CN116140991A - Hub motor end cover, flywheel and clamp spring assembly machine - Google Patents

Abstract

The invention provides an assembly machine for an end cover, a flywheel and a clamp spring of a hub motor, and belongs to the technical field of machinery. The assembly machine comprises a frame, wherein a first conveying line and a second conveying line are horizontally arranged on the frame, a first tool for horizontally supporting and positioning an end cover and a second tool for horizontally supporting and positioning a flywheel are respectively operated on the first conveying line and the second conveying line, a screwing mechanism and a clamping spring mechanism are further arranged on the frame, and the screwing mechanism and the clamping spring mechanism are sequentially distributed along the conveying direction of the first conveying line; the screwing mechanism is used for grabbing the flywheel and screwing the flywheel on the pipe body of the corresponding end cover; the clamping spring installing mechanism comprises a pressing mechanism and a clamping spring conveying line which is horizontally arranged, wherein the clamping spring conveying line comprises an outlet, a correcting mechanism for correcting the position of the clamping spring is arranged at the outlet, and the pressing mechanism is used for grabbing the corrected clamping spring and pressing the clamping spring into a clamping spring groove of the corresponding end cover. The invention can realize the automatic assembly of the end cover, the flywheel and the clamp spring.

Description

Hub motor end cover, flywheel and clamp spring assembly machine

Technical Field

The invention belongs to the technical field of machinery, and relates to an assembly machine for a hub motor, in particular to an assembly machine for an end cover, a flywheel and a clamp spring of the hub motor.

Background

The hub motor is designed by integrating a power system, a transmission system and a brake system of a vehicle.

The flywheel is an important component of the hub motor and is arranged on an end cover of the hub motor, specifically, as shown in fig. 1, the end cover 1 comprises a circular basin-shaped main body, a circle of flange holes which are axially penetrated along the main body are arranged at the edge of the main body, a circular ring-shaped guide part is coaxially formed at the top of the main body, and a pipe body 1a is coaxially formed at the bottom of the main body; the flywheel 2 comprises a ring body and a circle of teeth 2a formed outside the ring body, wherein the ring body is sleeved on the pipe body 1a and is in threaded connection with the pipe body 1a, a clamp spring groove for installing the clamp spring 3 is formed in the outer wall of the pipe body 1a, and the clamp spring 3 is pressed on the end face, far away from the main body, of the flywheel 2 so as to prevent the flywheel from falling off.

At present, the assembly of flywheel, end cover and jump ring three relies on the manual work to realize completely, and is not only efficient, and the human input is also many moreover, leads to the cost of labor high.

Disclosure of Invention

The invention aims at solving the problems in the prior art, and provides an assembly machine for an end cover, a flywheel and a clamp spring of a hub motor, which solves the technical problem of how to automatically assemble the flywheel and the clamp spring on the end cover.

The aim of the invention can be achieved by the following technical scheme: the assembly machine for the end cover, the flywheel and the clamp spring of the hub motor comprises a frame, and is characterized in that a first conveying line and a second conveying line are horizontally arranged on the frame, a first tool for horizontally supporting and positioning the end cover and a second tool for horizontally supporting and positioning the flywheel are respectively operated on the first conveying line and the second conveying line, and the first tool and the second tool are respectively distributed along the conveying direction of the first conveying line and the second conveying line; the frame is also provided with a screwing mechanism and a clamping spring installing mechanism which are sequentially distributed along the conveying direction of the conveying line I; the screwing mechanism is used for grabbing the flywheel and screwing the flywheel on the pipe body of the corresponding end cover; the clamping spring installing mechanism comprises a pressing mechanism and a clamping spring conveying line which is horizontally arranged, wherein the clamping spring conveying line comprises an outlet, a correcting mechanism for correcting the position of the clamping spring is arranged at the outlet, and the pressing mechanism is used for grabbing the corrected clamping spring and pressing the clamping spring into a clamping spring groove of the corresponding end cover.

The first conveying line, the second conveying line and the clamp spring conveying line are arranged to automatically convey the end cover, the flywheel and the clamp spring respectively, the screwing mechanism and the pressing mechanism are facilitated to automatically load the flywheel and the clamp spring in sequence, the whole process can be fully automated and operated in a production line except that parts are put in the early stage, so that the efficiency is high, the labor input can be reduced, and the labor cost is reduced.

In the wheel hub motor end cover, flywheel and clamp spring assembly machine, the first conveying line comprises a first driving mechanism and a first conveying rail in a shape of a Chinese character 'hui', the second conveying line comprises a second driving mechanism and a second conveying rail in a shape of a Chinese character 'hui', the first conveying rail and the second conveying rail are coaxially arranged, and the clamp spring conveying line and the second conveying rail are respectively arranged on the outer side and the inner side of the first conveying rail; the first tools are arranged on the first conveying track in a shape like a Chinese character 'Hui', two adjacent tools in the same row are contacted end to end, the second tools are arranged on the second conveying track in a shape like a Chinese character 'Hui', two adjacent tools in the same row are contacted end to end, and the first driving mechanism and the second driving mechanism are used for respectively pushing the first tools and the second tools to operate; and a gap is reserved on the first conveying track and the second conveying track for the first tool and the second tool to operate respectively. The first conveying line and the second conveying line are integrally in a shape like a Chinese character 'hui', and the clamp spring conveying line and the second conveying line are respectively arranged on the outer side and the inner side of the first conveying line, so that the distance between parts can be effectively reduced, the whole structure is compact, and the occupied space is reduced.

In the wheel hub motor end cover, the flywheel and the clamp spring assembly machine, the bracket is fixed on the frame and comprises the vertically arranged platy part, the length of the platy part extends along the distribution direction of the first conveying track and the second conveying track, and the screwing mechanism and the pressing mechanism are respectively arranged on two sides of the width of the platy part, so that the distance between each part is further reduced, the whole structure is more compact, and the space occupation is further reduced.

In the hub motor end cover, flywheel and clamp spring assembly machine, the screwing mechanism comprises a power column arranged vertically, a base arranged on the plate-shaped part in a sliding manner and a translation mechanism for driving the base to reciprocate and translate along the length direction of the plate-shaped part, and a power component for driving the power column to lift and rotate is arranged on the base; the lower end of the power column is provided with a concave cavity for the flywheel to extend into, a circle of through holes are radially formed in the side wall of the concave cavity in a penetrating mode, glass bead springs for supporting flywheel teeth are fixed in the through holes, and a linkage mechanism enabling the flywheel to rotate along with the power column is arranged between the flywheel and the power column. The use process is as follows: the power post moves to the second top of the conveying track, then the power post moves downwards to enable the flywheel to extend into the concave cavity, the glass bead spring is extruded and contracted to enable the flywheel tooth to pass through, after the flywheel tooth passes through, the glass bead spring extends out and presses the bottom wall of the flywheel tooth to upwards support the flywheel to prevent the flywheel from falling, then the power post drives the flywheel to move to the first top of the conveying track and moves downwards to enable the flywheel to be sleeved into the end cover tube body, then the power post rotates to enable the flywheel to be screwed into the tube body, after the flywheel and the tube body are assembled, the power post moves upwards, the glass bead spring is compressed and contracted to enable the power post to be smoothly separated, and the whole process is completely and automatically carried out.

In the hub motor end cover, flywheel and clamp spring assembly machine, a circle of supporting surfaces uniformly distributed along the circumference of the power column are formed in the concave cavity, and the supporting surfaces are positioned on the upper side of the glass bead spring and are used for being abutted against the tooth top wall of the flywheel. The supporting surface is matched with the glass bead spring to strengthen the axial positioning effect of the flywheel, ensure the stable proceeding of the screw connection process and further strengthen the use stability and convenience of the assembly machine.

In the hub motor end cover, flywheel and jump ring assembly machine, the linkage mechanism comprises a circle of tooth socket which is arranged on the inner wall of the concave cavity and into which the flywheel tooth extends, the shape and the size of the tooth socket are matched with those of the flywheel tooth, and the lower end of the tooth socket is provided with an opening. By adopting the design, the device has the advantages of simple structure and stable operation.

In another scheme, in the assembly machine for the end cover, the flywheel and the clamp spring of the hub motor, the linkage mechanism comprises a circle of protruding blocks formed on the inner wall of the concave cavity, and the protruding blocks are used for being inserted into gaps between two adjacent teeth on the flywheel.

In the hub motor end cover, flywheel and clamp spring assembly machine, a circle of notch is formed in the side wall of the concave cavity to divide the lower end of the power column into a circle of arc blocks, the inner side of each arc block is provided with the supporting surface and the tooth groove, and the supporting surface is in a circular arc shape coaxial with the arc blocks. The notch is arranged, so that the power column is convenient to process, and the flywheel positioning state can be checked through the notch, so that the assembly machine can work stably.

In the hub motor end cover, flywheel and clamp spring assembly machine, the power part is a power head.

In another scheme, in the hub motor end cover, flywheel and clamp spring assembly machine, the power component comprises a supporting seat, a driving piece and a motor, wherein the driving piece is fixed on the base and used for driving the supporting seat to lift, and the motor is fixed on the supporting seat and used for driving the power column.

In the hub motor end cover, flywheel and clamp spring assembly machine, the translation mechanism is a linear driving unit, the linear driving unit comprises a sliding block and a guide rod, the guide rod is fixedly connected with the plate-shaped part, and the base is fixed on the sliding block.

As another scheme, in the hub motor end cover, flywheel and clamp spring assembly machine, the translation mechanism comprises an electric push rod, and a main shaft of the electric push rod is fixedly connected with the base.

In the wheel hub motor end cover, flywheel and jump ring assembly machine, the first driving mechanism comprises a first driving piece and a first vertically arranged push plate, the first push plate is provided with four push plates and is respectively arranged at four corners of the first conveying track, the first driving piece and the first push plate are the same in number and correspond to each other in position one by one, and the first driving piece is used for driving the first corresponding push plate to translate along the running direction of the first corresponding tool. The first driving part is an air cylinder or an electric push rod.

In the wheel hub motor end cover, flywheel and jump ring assembly machine, the driving mechanism II comprises a driving piece II and a vertically arranged pushing plate II, the pushing plate II is four and is respectively arranged at four corners of the conveying track II, the driving piece II and the pushing plate II are the same in number and correspond to each other in position one by one, and the driving piece II is used for driving the corresponding pushing plate II to translate along the running direction of the corresponding tool II. The second driving part is an air cylinder or an electric push rod.

In the hub motor end cover, flywheel and jump ring assembly machine, the correction mechanism comprises a positioning frame fixed on the frame, a strip-shaped groove which is horizontally arranged and matched with the jump ring in size is formed in the top wall of the positioning frame, the length of the strip-shaped groove extends along the length direction of the plate-shaped part, one end of the strip-shaped groove is connected with the outlet of the jump ring conveying line, and the inner wall of the other end of the strip-shaped groove is an arc surface matched with the jump ring. During the use, slide into the bar groove from jump ring transfer chain export output jump ring and carry out the position correction to finally with the circular arc surface contact spacing and do further position adjustment, ensure that the jump ring is accurate to be removed to snatch the position, guarantee follow-up operation is gone on steadily.

In the hub motor end cover, flywheel and clamp spring assembly machine, the clamp spring conveying line comprises a supporting plate horizontally fixed on the frame and a supporting block fixed on the supporting plate, a conveying channel which is in a straight strip shape and is opposite to the strip-shaped groove is formed between the supporting plate and the supporting block, the height of the conveying channel is matched with the thickness of the clamp spring, and the outlet of the conveying channel is the outlet of the clamp spring conveying line; a material pipe is vertically fixed on the supporting block, the material pipe is communicated with the conveying channel through a material passing hole vertically penetrating through the supporting block, and the inner diameters of the material pipe and the material passing hole are matched with the outer diameter of the clamp spring; the support plate is also provided with a third driving piece and a driving plate, the conveying channel is arranged between the driving plate and the strip-shaped groove, one end of the driving plate stretches into the conveying channel, and the third driving piece is used for pushing the driving plate to reciprocate along the length direction of the conveying channel. During the use, pile up from top to bottom in the material pipe at a plurality of jump rings, be in the jump ring of below gets into conveying channel through the feed opening under the action of gravity, and then three drive plate movements of driving piece push away the jump ring to the bar inslot, and above-mentioned process cycle goes on, and the manual work only needs to put into the material pipe with the jump ring, and other processes go on fully automatically, not only efficient, but also can use manpower sparingly to throw into.

In the hub motor end cover, flywheel and jump ring assembly machine, a circular hole which is vertically and penetratingly arranged is formed in the bottom wall of the strip-shaped groove, the circular hole and the circular arc surface are coaxially arranged, and the inner diameter of the circular hole is larger than the inner diameter of the jump ring but smaller than the outer diameter of the jump ring; the correcting mechanism further comprises a correcting rod coaxially arranged in the round hole, the upper end of the correcting rod is a cone part matched with the inner hole of the clamp spring, the diameter of the cone part is gradually increased downwards, and a driving piece IV for driving the correcting rod to lift is fixedly arranged on the frame. When the clamping spring is pressed on the arc surface and stays, the driving piece IV drives the correction rod to move upwards to enable the conical part to extend into the clamping spring and jack up the clamping spring, so that the position of the clamping spring is further corrected by utilizing the conical degree of the conical part, the position accuracy of the clamping spring is further enhanced, and the follow-up installation is more stable.

In the hub motor end cover, flywheel and jump ring assembly machine, the pressing mechanism comprises a connecting seat arranged on the plate-shaped part in a sliding mode, a connecting frame arranged on the connecting seat in a sliding mode, a driving piece five for driving the connecting seat to slide along the length direction of the plate-shaped part and a driving piece six for driving the connecting frame to lift, and a grabbing structure for grabbing the corrected jump ring and a pressing structure for pressing the jump ring on the grabbing structure into the clamp ring groove of the end cover are arranged on the connecting frame. The pressing mechanism is divided into a sliding part, a material grabbing structure and a material pressing structure, so that the design is convenient, and the running stability can be improved.

In the hub motor end cover, flywheel and clamp spring assembly machine, the bottom wall of the strip-shaped groove vertically penetrates through a mounting hole, a round sleeve is inserted into the mounting hole, an inner hole of the round sleeve is the round hole, and a lifting structure for driving the round sleeve to lift is further arranged on the positioning frame; the grabbing structure comprises an expansion sleeve and a driving piece seven which are both arranged on the connecting frame, the outer wall of the expansion sleeve is matched with the clamp spring, the upper end of the expansion sleeve is fixedly connected with the connecting frame, an outer supporting rod is vertically arranged in the expansion sleeve, the upper end of the outer supporting rod extends out of the expansion sleeve and is connected with the driving piece seven, the lower end of the expansion sleeve is matched with the outer supporting rod through a conical surface, the driving piece seven is used for driving the outer supporting rod to lift, and the expansion sleeve can move to be coaxial with the correction rod. The use process is as follows: the expanding sleeve moves to be aligned with the correcting rod and enables the outer supporting rod to be pressed on the correcting rod, then the expanding sleeve and the correcting rod synchronously move downwards to enable the clamp spring to be pressed on the round sleeve, at the moment, the expanding sleeve part enters the inner hole of the clamp spring, then the round sleeve moves upwards to lift the clamp spring, then the outer supporting rod moves upwards to enable the expanding sleeve to expand to tightly hold the clamp spring, then the expanding sleeve moves to the end cover position, the outer supporting rod moves downwards to enable the expanding sleeve to shrink to loosen the clamp spring in the running process of the pressing structure, and smooth clamping of the clamp spring into the clamp spring groove of the end cover is ensured.

In the hub motor end cover, flywheel and clamp spring assembly machine, the driving piece IV is of a telescopic cylinder, so that the outer supporting rod can directly force the correction rod to move downwards for resetting during actual use, the design is convenient, and the overall working stability is ensured.

In the hub motor end cover, flywheel and clamp spring assembly machine, the material pressing structure comprises an extrusion frame and a driving piece eight for driving the extrusion frame to lift, and the driving piece eight is arranged on the connecting frame; the bottom wall of the extrusion frame is a pressing plate part which is horizontally arranged, and a yielding hole for the lower end of the expansion sleeve to pass through is vertically penetrated on the pressing plate part. The clamp plate portion both is used for promoting the jump ring card on the cover that rises and goes into the end cover jump ring groove, is used for restricting the circle cover again and drives the jump ring distance of shifting up, makes the jump ring once only remove in place, promptly in this application, the extrusion frame possesses a thing dual-purpose effect, in the simplified structure, convenient equipment simultaneously.

In the wheel hub motor end cover, flywheel and clamp spring assembly machine, the extrusion frame is approximately U-shaped, and eight driving parts are respectively connected to two ends of the extrusion frame to provide larger and stable acting force to install the clamp spring.

In the hub motor end cover, flywheel and clamp spring assembly machine, the material pipe comprises a circular pipe which is vertically arranged and made of elastic materials, one side of the circular pipe is provided with an opening, the circular pipe is sleeved with and fixed with hoops, and the hoops are multiple and are distributed along the axial direction of the circular pipe. The anchor ear is arranged on the circular tube, so that the inner diameter of the circular tube can be adjusted in a small extent to adjust friction between the clamp spring and the circular tube, smooth and orderly sliding of the clamp spring is ensured, and the working stability is further improved.

Compared with the prior art, the hub motor end cover, flywheel and clamp spring assembly machine has the following advantages:

1. the first conveying line, the second conveying line and the clamp spring conveying line are arranged to automatically convey the end cover, the flywheel and the clamp spring respectively, the screwing mechanism and the pressing mechanism are facilitated to automatically load the flywheel and the clamp spring in sequence, the whole process can be fully automated and operated in a production line except that parts are put in the early stage, so that the efficiency is high, the labor input can be reduced, and the labor cost is reduced.

2. The first conveying line and the second conveying line are integrally in a shape like a Chinese character 'hui', and the clamp spring conveying line and the second conveying line are respectively arranged on the outer side and the inner side of the first conveying line, so that the distance between parts can be effectively reduced, the whole structure is compact, and the occupied space is reduced.

3. The driving piece IV drives the correction rod to move upwards to enable the cone portion to extend into the clamp spring and jack up the clamp spring, so that the position of the clamp spring is further corrected by utilizing the taper of the cone portion, the position accuracy of the clamp spring is further enhanced, and the follow-up installation is more stable.

4. The clamp plate portion both is used for promoting the jump ring card on the cover that rises and goes into the end cover jump ring groove, is used for restricting the circle cover again and drives the jump ring distance of shifting up, makes the jump ring once only remove in place, promptly in this application, the extrusion frame possesses a thing dual-purpose effect, in the simplified structure, convenient equipment simultaneously.

Drawings

Fig. 1 shows a connection structure of the end cover, the flywheel and the clamp spring.

Fig. 2 is a schematic diagram of a perspective structure of the hub motor end cover, flywheel and clamp spring assembly machine.

Fig. 3 is a schematic diagram of the distribution structure of the first conveying line, the second conveying line and the clamp spring conveying line.

Fig. 4 is a schematic structural diagram of the first tooling.

Fig. 5 is a schematic structural diagram of a second tooling.

Fig. 6 is a schematic perspective view of the connection of the power column and flywheel.

FIG. 7 is a schematic cross-sectional view of the power column and flywheel connection.

Fig. 8 is a schematic structural view of the press-in mechanism.

Fig. 9 is a schematic perspective view of a clamp spring conveying line.

Fig. 10 is a schematic cross-sectional view of the clamp spring conveyor line.

Fig. 11 is a schematic perspective view of a material grabbing structure and a material pressing structure.

Fig. 12 is an enlarged schematic view of the structure at a in fig. 11.

Fig. 13 is a schematic cross-sectional structural view of the material grabbing structure and the material pressing structure.

In the figure, 1, an end cover; 1a, a tube body; 2. a flywheel; 2a, teeth; 3. clamping springs; 4. a frame; 5. a first conveying line; 5a, conveying track one; 5b, a first pushing plate; 5c, universal balls; 6. a second conveying line; 6a, conveying a second track; 6b, a second pushing plate; 7. a first tool; 7a, a bottom plate; 7b, a circular plate; 7c, positioning a first column; 8. a second tool; 8a, positioning blocks; 8b, positioning column II; 9. a bracket; 9a, a plate-like portion; 10. a power column; 10a, a cavity; 10b, a supporting surface; 10c, tooth grooves; 10d, arc blocks; 11. a base; 12. a power component; 13. a glass bead spring; 14. a linear driving unit; 15. a support plate; 16. a support block; 17. a conveying channel; 18. a material pipe; 18a, round tubes; 18b, hoops; 19. a third driving member; 20. a driving plate; 21. a positioning frame; 21a, a bar-shaped groove; 21b, an arc surface; 22. a correction lever; 22a, a taper; 23. a driving member IV; 24. a connecting seat; 25. a connecting frame; 26. a fifth driving member; 27. a driving piece six; 28. a round sleeve; 28a, a round hole; 29. a mounting plate; 30. a driving piece nine; 31. expanding sleeve; 32. a driving member seven; 33. an outer stay; 34. an extrusion frame; 34a, a platen portion; 35. and a driving member eight.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 2, the assembly machine for the end cover, the flywheel and the clamp spring of the hub motor comprises a frame 4, a first conveying line 5 and a second conveying line 6 are horizontally arranged on the frame 4, a first tool 7 for horizontally supporting and positioning the end cover 1 and a second tool 8 for horizontally supporting and positioning the flywheel 2 are respectively operated on the first conveying line 5 and the second conveying line 6, and the first tool 7 and the second tool 8 are respectively provided with a plurality of tools and are respectively distributed along the conveying directions of the first conveying line 5 and the second conveying line 6.

In particular the number of the elements,

as shown in fig. 3 and 4, the first tool 7 includes a bottom plate 7a horizontally arranged and a circular plate 7b horizontally arranged on the bottom plate 7a, and the circular plate 7b and the bottom plate 7a are coaxially arranged. The circular plate 7b is pressed on the bottom plate 7a, and the two are fixedly connected. Preferably, the circular plate 7b and the bottom plate 7a are fixedly connected by screws. The top wall of the circular plate 7b is coaxially provided with a circular groove matched with the guide part of the end cover 1, and a circle of positioning column I7 c matched with the flange hole of the end cover 1 is vertically fixed on the edge of the circular plate 7 b. When the end cover 1 is used, the edge of the end cover 1 is pressed on the circular plate 7b, at the moment, each positioning column is inserted into one of the flange holes, and the guide part is inserted into the circular groove, so that the end cover 1 can only move up and down relative to the circular plate 7 b.

As shown in fig. 3 and 5, the second tooling 8 comprises a positioning block 8a which is horizontally arranged, a positioning groove which is matched with the annular body of the flywheel 2 is coaxially formed on the upper side of the positioning block 8a, positioning columns two 8b are vertically fixed on the positioning block 8a, at least two positioning columns two are uniformly distributed along the circumferential direction of the annular body, and the positioning columns two 8b are matched with gaps between two adjacent teeth 2a on the flywheel 2. When the flywheel 2 is used, the teeth 2a of the flywheel 2 are pressed on the top wall of the positioning block 8a, the annular body of the flywheel 2 is inserted into the positioning groove, and the second positioning column 8b is inserted into one of the gaps, so that the flywheel 2 can only move up and down relative to the positioning block 8 a.

As shown in fig. 2 and 8, the frame 4 is further provided with a screwing mechanism and a clamping spring mechanism, and the screwing mechanism and the clamping spring mechanism are sequentially distributed along the conveying direction of the conveying line one 5. The screwing mechanism is used for grabbing the flywheel 2 and screwing the flywheel 2 on the pipe body 1a of the corresponding end cover 1; the clamping spring installing mechanism comprises a pressing mechanism and a clamping spring conveying line which is horizontally arranged, wherein the clamping spring conveying line comprises an outlet, a correcting mechanism for correcting the position of the clamping spring 3 is arranged at the outlet, and the pressing mechanism is used for grabbing the corrected clamping spring 3 and pressing the clamping spring 3 into a clamping spring groove corresponding to the end cover 1.

In the present embodiment of the present invention, in the present embodiment,

as shown in fig. 3, the first conveying line 5 includes a first driving mechanism and a first conveying rail 5a in a shape of a Chinese character 'hui', a plurality of first tools 7 are arranged on the first conveying rail 5a in a shape of a Chinese character 'hui', and two adjacent first tools 7 are in head-to-tail contact, at this time, two adjacent bottom plates 7a are in head-to-tail contact, and a space is reserved on the first conveying rail 5a for the first tools 7 to operate. The first driving mechanism is used for pushing the first tool 7 to operate.

The conveying line II 6 comprises a driving mechanism II and a conveying track II 6a which is in a shape like a Chinese character 'Hui', a plurality of tooling II 8 are arranged on the conveying track II 6a in a shape like a Chinese character 'Hui', and two adjacent tooling II 8 are in head-to-tail contact, at this time, two adjacent positioning blocks 8a are in head-to-tail contact, and a gap is reserved on the conveying track II 6a for the tooling II 8 to operate. The second driving mechanism is used for pushing the second tooling 8 to operate.

The first conveying track 5a and the second conveying track 6a are coaxially arranged, and the clamp spring conveying line and the second conveying track 6a are respectively arranged on the outer side and the inner side of the first conveying track 5 a. The distance between each spare part can be effectively reduced, and the whole structure becomes more compact, reduces space occupation. Further, the frame 4 is fixed with a bracket 9, the bracket 9 includes a vertically arranged plate-shaped portion 9a, the length of the plate-shaped portion 9a extends along the distribution direction of the first conveying track 5a and the second conveying track 6a, and the screwing mechanism and the pressing mechanism are respectively arranged on two sides of the width of the plate-shaped portion 9a, so that the distance between each part is further reduced, the whole structure is more compact, and the space occupation is further reduced.

The structure of the first driving mechanism is specifically as follows: the device comprises a first driving piece and a first vertically arranged push plate 5b, wherein the first push plate 5b is provided with four push plates and is respectively arranged at four corners of a first conveying track 5a, the first driving piece and the first push plate 5b are the same in number and correspond to each other in position one by one, and the first driving piece is used for driving the corresponding first push plate 5b to translate along the running direction of a corresponding first tool 7. Wherein, the first driving piece is an air cylinder or an electric push rod. Further, the first conveying track 5a is formed by surrounding four strip-shaped sections, fluent strips are horizontally fixed in each strip-shaped section, and the bottom plate 7a is pressed on the fluent strips, so that the first tool 7 can slide stably and smoothly. A plurality of universal balls 5c are fixed between every two adjacent strip sections, so that the tool I7 turns smoothly.

The structure of the driving mechanism II is specifically as follows: the two pushing plates 6b are arranged vertically, four pushing plates 6b are respectively arranged at four corners of the second conveying track 6a, the two driving members are the same in number and correspond to the two pushing plates 6b in position one by one, and the two driving members are used for driving the corresponding two pushing plates 6b to translate along the running direction of the corresponding second tool 8. The second driving part is an air cylinder or an electric push rod.

The screwing mechanism has the following structure: as shown in fig. 2, the power column 10 is provided vertically, the base 11 is provided slidably on the plate-like portion 9a, and the translation mechanism for driving the base 11 to reciprocate in the longitudinal direction of the plate-like portion 9 a. The base 11 is slidably connected to the plate-like portion 9a by a rail-slider structure, and naturally, the base 11 may be slidably connected to the plate-like portion 9a by a chute-slider structure. As shown in fig. 2, 6 and 7, a power unit 12 for driving the power column 10 to rise and fall and rotate is provided on the base 11; the lower end of the power column 10 is provided with a concave cavity 10a for the flywheel 2 to extend into, and the concave cavity 10a and the power column 10 are coaxial. A circle of through holes are radially formed in the side wall of the concave cavity 10a in a penetrating mode, glass bead springs 13 used for supporting teeth 2a of the flywheel 2 are fixed in the through holes, and a linkage mechanism enabling the flywheel 2 to rotate along with the power column 10 is arranged between the flywheel 2 and the power column 10. The use process is as follows: the power column 10 moves to the upper part of the second conveying track 6a, then the power column 10 moves downwards to enable the flywheel 2 to extend into the concave cavity 10a, the glass bead spring 13 is extruded and contracted to enable the flywheel 2 teeth 2a to pass, after the flywheel 2 teeth 2a pass through, the glass bead spring 13 extends out and presses the bottom wall of the flywheel 2 teeth 2a to support the flywheel 2 upwards so as to prevent the flywheel 2 from falling, then the power column 10 drives the flywheel 2 to move to the first conveying track 5a and moves downwards to enable the flywheel 2 to be sleeved into the pipe body 1a of the end cover 1, then the power column 10 rotates to enable the flywheel 2 to be screwed into the pipe body 1a, after the flywheel 2 and the pipe body 1a are assembled, the power column 10 moves upwards, the glass bead spring 13 is compressed and contracted to enable the power column 10 to be smoothly separated, and the whole process is completely automatic.

Further, a circle of supporting surfaces 10b uniformly distributed along the circumferential direction of the power column 10 are formed in the concave cavity 10a, and the supporting surfaces 10b are positioned on the upper side of the glass bead spring 13 and are used for being pressed against the top wall of the tooth 2a of the flywheel 2. The supporting surface 10b is matched with the glass bead spring 13 so as to strengthen the axial positioning effect of the flywheel 2, ensure the stable screwing process and further strengthen the use stability and convenience of the assembly machine.

The linkage mechanism has the following structure: comprises a circle of tooth sockets 10c which are arranged on the inner wall of the concave cavity 10a and are used for the teeth 2a of the flywheel 2 to extend into, the tooth slot 10c is matched with the tooth 2a of the flywheel 2 in shape and size, and the lower end of the tooth slot 10c is open. Further, a circle of notches are formed on the side wall of the cavity 10a to divide the lower end of the power column 10 into a circle of arc blocks 10d, the inner side of each arc block 10d is provided with the supporting surface 10b and the tooth groove 10c, and the supporting surface 10b is in a circular arc shape coaxial with the arc block 10 d. The notch is arranged, so that the power column 10 is convenient to process, and the positioning state of the flywheel 2 can be checked through the notch, so that the assembly machine can work stably. In the actual product, two tooth grooves 10c are formed in the inner side of each circular arc block 10 d.

The power unit 12 is a power head, which is an existing product that is available on the market.

The translation mechanism is a linear driving unit 14 as follows, the linear driving unit 14 is an existing product, and comprises a sliding block and a guide rod, the guide rod is fixedly connected with the plate-shaped part 9a, and the base 11 is fixed on the sliding block.

The clamp spring 3 conveying line is as follows: as shown in fig. 3, 8, 9 and 10, the conveyor comprises a support plate 15 horizontally fixed on the frame 4 and a support block 16 fixed on the support plate 15, a straight conveyor channel 17 is formed between the support plate 15 and the support block 16, and the length of the conveyor channel 17 extends along the length direction of the plate-shaped portion 9 a. The height of the conveying channel 17 is matched with the thickness of the clamp springs 3, namely, the conveying channel 17 can only accommodate one clamp spring 3, and the outlet of the conveying channel 17 is the outlet of a conveying line of the clamp springs 3. As shown in fig. 1, a material pipe 18 is vertically fixed on the supporting block 16, the material pipe 18 is communicated with the conveying channel 17 through a material passing hole vertically penetrating through the supporting block 16, the material pipe 18 and the material feeding hole are coaxially arranged, and the inner diameters of the material pipe 18 and the material passing hole are matched with the outer diameters of the clamp springs 3, so that only one clamp spring 3 enters the conveying channel 17 at a time; the supporting plate 15 is also provided with a third driving piece 19 and a driving plate 20, the conveying channel 17 is arranged between the driving plate 20 and the first conveying track 5a, one end of the driving plate 20 extends into the conveying channel 17, and the third driving piece 19 is used for pushing the driving plate 20 to reciprocate and translate along the length direction of the conveying channel 17. When the automatic feeding device is used, a plurality of clamp springs 3 are vertically piled in the material pipe 18, the clamp spring 3 at the lowest position enters the conveying channel 17 through the material hole under the action of gravity, then the driving piece III 19 drives the driving plate 20 to move so as to push out the clamp spring 3, the process is circularly carried out, the clamp spring 3 is manually put into the material pipe 18, other processes are completely and automatically carried out, the efficiency is high, and the labor input can be saved. In actual products, the driving plate 20 is positioned between the driving part III 19 and the conveying channel 17, the driving part III 19 is a cylinder, the cylinder body of the cylinder is fixed on the supporting plate 15, and the piston rod of the cylinder is fixedly connected with the driving plate 20. Naturally, the third driving member 19 may be an oil cylinder or an electric push rod.

Further illustratively, the tube 18 includes a tube 18a disposed vertically and formed of a resilient material, which may be a stainless steel material or a plastic material, and preferably the tube 18a is formed of a stainless steel material. The circular tube 18a is provided with an opening at one side, the circular tube 18a is sleeved and fixed with a plurality of hoops 18b, the hoops 18b are distributed along the axial direction of the circular tube 18a and used for adjusting the inner diameter of the circular tube 18a body 1a in a small scale to adjust friction between the clamp spring 3 and the circular tube 18a body 1a, so that smooth and orderly sliding of the clamp spring 3 is ensured, and the working stability is further improved.

The correction mechanism is as follows: including fixing the locating rack 21 on frame 4, the shaping has the bar groove 21a that the level set up and the size matches with jump ring 3 on the locating rack 21 roof, and bar groove 21a length extends along conveying channel 17 length direction, and conveying channel 17 export is linked up to this bar groove 21a one end, and bar groove 21a other end inner wall be with jump ring 3 matched circular arc face 21b. During the use, jump ring 3 slides into bar groove 21a through conveying channel 17 to finally with arc surface 21b contact spacing, ensure that jump ring 3 is accurate to be removed to snatch the position, guarantee follow-up operation and go on steadily.

Further, as shown in fig. 9 and 10, a circular hole 28a vertically penetrating is formed in the bottom wall of the strip-shaped groove 21a, the circular hole 28a and the circular arc surface 21b are coaxially arranged, and the inner diameter of the circular hole 28a is larger than the inner diameter of the clamp spring 3 but smaller than the outer diameter of the clamp spring 3; the correcting mechanism further comprises a correcting rod 22 coaxially arranged in the round hole 28a, the upper end of the correcting rod 22 is a cone 22a matched with the inner hole of the clamp spring 3, the diameter of the cone 22a is gradually increased downwards, and a driving piece four 23 for driving the correcting rod 22 to lift is fixedly arranged on the stand 4. When the clamp spring 3 is pressed on the arc surface 21b and stays in use, the driving part IV 23 drives the correction rod 22 to move upwards to enable the conical part 22a to extend into the clamp spring 3 and jack up the clamp spring, so that the position of the clamp spring 3 is further corrected by utilizing the taper of the conical part 22a, the position accuracy of the clamp spring 3 is further enhanced, and the subsequent installation is more stable.

In an actual product, the driving piece IV 23 is a telescopic cylinder, the cylinder body of the telescopic cylinder is fixed on the frame 4, and the piston rod of the telescopic cylinder is fixedly connected with the correction rod 22.

As shown in fig. 11, 12 and 13, the press-in mechanism has the following structure: comprises a connecting seat 24 arranged on the plate-shaped part 9a in a sliding way, a connecting frame 25 arranged on the connecting seat 24 in a sliding way, a driving piece five 26 for driving the connecting seat 24 to slide along the length direction of the plate-shaped part 9a and a driving piece six 27 for driving the connecting frame 25 to lift. The connecting frame 25 is provided with a grabbing structure for grabbing the corrected clamp spring 3 and a pressing structure for pressing the clamp spring 3 on the grabbing structure into a clamp spring groove of the end cover 1. The pressing mechanism is divided into a sliding part, a material grabbing structure and a material pressing structure, so that the design is convenient, and the running stability can be improved.

Wherein,,

the connecting seat 24 is slidably arranged on the plate-shaped portion 9a through a guide rail and slide block structure; the connecting frame 25 is slidably arranged on the connecting seat 24 through a guide rail and slide block structure, and in an actual product, the guide rail and the slide block are respectively fixedly connected with the connecting frame 25 and the connecting seat 24.

It is sufficient that the driving piece five 26 and the driving piece six 27 are cylinders or oil cylinders, wherein a piston rod of the driving piece five 26 is fixedly connected with the connecting seat 24; the piston rod of the driving piece six 27 is fixedly connected with the corresponding guide rail.

As shown in fig. 9 and 10, the bottom wall of the bar-shaped groove 21a is vertically perforated with a mounting hole, a round sleeve 28 is inserted into the mounting hole, the inner hole of the round sleeve 28 is the above-mentioned round hole 28a, preferably the top wall of the round sleeve 28 is flush with the bottom wall of the bar-shaped groove 21a, and the positioning frame 21 is further provided with a lifting structure for driving the round sleeve 28 to lift. Specifically, the lifting structure includes a horizontally disposed mounting plate 29 and a driving member nine 30 for driving the mounting plate 29 to lift. Wherein the round sleeve 28 is pressed on the top wall of the mounting plate 29 and fixedly connected with the mounting plate; the mounting plate 29 is arranged between the driving part nine 30 and the round sleeve 28, the driving part nine 30 is an air cylinder or an oil cylinder, the cylinder body of the driving part nine 30 is fixed on the positioning frame 21, and the piston rod of the driving part nine 30 is fixedly connected with the mounting plate 29. In an actual product, the round sleeve 28 is fixed in the middle of the mounting plate 29, and two driving parts nine 30 are respectively applied to two ends of the mounting plate 29 so as to improve the lifting stability of the round sleeve 28; the mounting plate 29 is provided with a relief hole through which the correction lever 22 passes.

The grabbing structure is as follows: as shown in fig. 12 and 13, the lifting device comprises a lifting sleeve 31 and a driving piece seven 32 which are both arranged on a connecting frame 25, wherein the outer wall of the lifting sleeve 31 is matched with a clamp spring 3, the upper end of the lifting sleeve 31 is fixedly connected with the connecting frame 25, an outer supporting rod 33 is vertically arranged in the lifting sleeve 31, the upper end of the outer supporting rod 33 extends out of the lifting sleeve 31 and is connected with the driving piece seven 32, the lower end of the lifting sleeve 31 is matched with the outer supporting rod 33 through a conical surface, and the driving piece seven 32 is used for driving the outer supporting rod 33 to lift. In this embodiment, the driving member seven 32 is a cylinder, the cylinder body is fixed on the connecting frame 25, and the cylinder piston rod is fixedly connected with the outer supporting rod 33. Through the movement of the connecting frame 25, the expansion sleeve 31 and the correction rod 22 can be coaxial, and the whole material grabbing process is as follows: the expanding sleeve 31 moves to be aligned with the correcting rod 22 and enables the outer supporting rod 33 to be pressed on the correcting rod 22, then the expanding sleeve 31 and the correcting rod 22 synchronously move downwards to enable the clamp spring 3 to be pressed on the round sleeve 28, at the moment, the expanding sleeve 31 partially enters an inner hole of the clamp spring 3, then the round sleeve 28 moves upwards to lift the clamp spring 3, then the outer supporting rod 33 moves upwards to enable the expanding sleeve 31 to expand and tightly hold the clamp spring 3, then the expanding sleeve 31 moves to the position of the end cover 1, and during the operation of the pressing structure, the outer supporting rod 33 moves downwards to enable the expanding sleeve 31 to shrink and loosen the clamp spring 3, so that smooth clamping of the clamp spring 3 into a clamp spring groove of the end cover 1 is ensured.

The pressing structure is as follows: comprises a squeezing frame 34 and a driving part eight 35 for driving the squeezing frame 34 to lift, and the driving part eight 35 is arranged on the connecting frame 25. Wherein, the bottom wall of the extrusion frame 34 is a pressing plate portion 34a horizontally arranged, and a relief hole for the lower end of the expansion sleeve 31 to pass through is vertically arranged on the pressing plate portion 34 a. During actual use, the pressing plate part 34a is used for pushing the clamp spring 3 on the expansion sleeve 31 to be clamped into the clamp spring groove of the end cover 1, and is also used for limiting the circle sleeve 28 to drive the clamp spring 3 to move upwards to a distance, so that the clamp spring 3 can move in place at one time, namely, in the application, the extrusion frame 34 has a dual-purpose effect, and the structure is simplified and meanwhile, the assembly is convenient.

Further, the pressing frame 34 is substantially U-shaped, and two driving members eight 35 are respectively connected to both ends of the pressing frame 34 to provide a larger and stable force for mounting the clamp spring 3. In this embodiment, the driving member eight 35 is a cylinder or an oil cylinder.

Example two

The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that: the linkage mechanism comprises a circle of protruding blocks formed on the inner wall of the concave cavity 10a, and the protruding blocks are used for being inserted into gaps between two adjacent teeth 2a on the flywheel 2.

Example III

The structure and principle of the third embodiment are basically the same as those of the first embodiment, except that: the power unit 12 includes a support base, a driving member fixed to the base 11 for driving the support base to be lifted, and a motor fixed to the support base for driving the power column 10.

Example IV

The structure and principle of the fourth embodiment are basically the same as those of the first embodiment, except that: the translation mechanism comprises an electric push rod, and a main shaft of the electric push rod is fixedly connected with the base 11.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The wheel hub motor end cover, flywheel and clamp spring assembly machine comprises a frame (4), and is characterized in that a first conveying line (5) and a second conveying line (6) are horizontally arranged on the frame (4), a first tool (7) for horizontally supporting and positioning the end cover (1) and a second tool (8) for horizontally supporting and positioning the flywheel (2) are respectively operated on the first conveying line (5) and the second conveying line (6), and the first tool (7) and the second tool (8) are multiple and are respectively distributed along the conveying directions of the first conveying line (5) and the second conveying line (6); the frame (4) is also provided with a screwing mechanism and a clamping spring installing mechanism, and the screwing mechanism and the clamping spring installing mechanism are sequentially distributed along the conveying direction of the conveying line I (5); the screwing mechanism is used for grabbing the flywheel (2) and screwing the flywheel (2) on the pipe body (1 a) of the corresponding end cover (1); the clamping spring installing mechanism comprises a pressing mechanism and a clamping spring conveying line which is horizontally arranged, wherein the clamping spring conveying line comprises an outlet, a correcting mechanism used for correcting the position of a clamping spring (3) is arranged at the outlet, and the pressing mechanism is used for grabbing the corrected clamping spring (3) and pressing the clamping spring (3) into a clamping spring groove of a corresponding end cover (1).

2. The wheel hub motor end cover, flywheel and clamp spring assembly machine according to claim 1, wherein the first conveying line (5) comprises a first driving mechanism and a first conveying rail (5 a) in a shape of a Chinese character 'hui', the second conveying line (6) comprises a second driving mechanism and a second conveying rail (6 a) in a shape of a Chinese character 'hui', the first conveying rail (5 a) and the second conveying rail (6 a) are coaxially arranged, and the clamp spring conveying line and the second conveying rail (6 a) are respectively arranged on the outer side and the inner side of the first conveying rail (5 a); the first tools (7) are arranged on the first conveying track (5 a) in a shape like a Chinese character 'hui', the two tools (7) which are arranged in the same row and are adjacent to each other in position are contacted end to end, the second tools (8) are arranged on the second conveying track (6 a) in a shape like a Chinese character 'hui', the two tools (8) which are arranged in the same row and are adjacent to each other in position are contacted end to end, and the first driving mechanism and the second driving mechanism are used for respectively pushing the first tools (7) and the second tools (8) to operate; and a gap is reserved on the first conveying track (5 a) and the second conveying track (6 a) for the first tool (7) and the second tool (8) to operate respectively.

3. The hub motor end cover, flywheel and jump ring assembly machine according to claim 2, characterized in that a bracket (9) is fixed on the frame (4), the bracket (9) comprises a vertically arranged plate-shaped part (9 a), the length of the plate-shaped part (9 a) extends along the distribution direction of a first conveying track (5 a) and a second conveying track (6 a), and a screwing mechanism and a pressing mechanism are respectively arranged on two sides of the width of the plate-shaped part (9 a).

4. The hub motor end cover, flywheel and jump ring assembly machine according to claim 3, characterized in that the screwing mechanism comprises a power column (10) arranged vertically, a base (11) arranged on the plate-shaped part (9 a) in a sliding manner and a translation mechanism for driving the base (11) to reciprocate and translate along the length direction of the plate-shaped part (9 a), and a power component (12) for driving the power column (10) to lift and rotate is arranged on the base (11); the lower end of the power column (10) is provided with a concave cavity (10 a) for the flywheel (2) to extend into, a circle of through holes are radially formed in the side wall of the concave cavity (10 a) in a penetrating mode, glass bead springs (13) used for supporting teeth (2 a) of the flywheel (2) are fixed in the through holes, and a linkage mechanism enabling the flywheel (2) to rotate along with the power column (10) is arranged between the flywheel (2) and the power column (10).

5. The hub motor end cover, flywheel and clamp spring assembly machine according to claim 3, wherein the correction mechanism comprises a positioning frame (21) fixed on the frame (4), a strip-shaped groove (21 a) which is horizontally arranged and is matched with the clamp spring (3) in size is formed in the top wall of the positioning frame (21), the length of the strip-shaped groove (21 a) extends along the length direction of the plate-shaped part (9 a), one end of the strip-shaped groove (21 a) is connected with the clamp spring conveying line outlet, and the inner wall of the other end of the strip-shaped groove (21 a) is an arc surface (21 b) matched with the clamp spring (3).

6. The wheel hub motor end cover, flywheel and clamp spring assembly machine according to claim 5, wherein the clamp spring conveying line comprises a supporting plate (15) horizontally fixed on the frame (4) and a supporting block (16) fixed on the supporting plate (15), a conveying channel (17) which is in a straight strip shape and is opposite to the strip-shaped groove (21 a) is formed between the supporting plate (15) and the supporting block (16), the height of the conveying channel (17) is matched with the thickness of the clamp spring (3), and the outlet of the conveying channel (17) is the outlet of the clamp spring conveying line; a material pipe (18) is vertically fixed on the supporting block (16), the material pipe (18) is communicated with the conveying channel (17) through a material passing hole vertically penetrating through the supporting block (16), and the inner diameters of the material pipe (18) and the material passing hole are matched with the outer diameter of the clamp spring (3); still be equipped with driving piece III (19) and drive plate (20) on backup pad (15), conveying passageway (17) are in between drive plate (20) and bar groove (21 a), and drive plate (20) one end stretches into conveying passageway (17), and driving piece III (19) are used for promoting drive plate (20) along the reciprocal translation of conveying passageway (17) length direction.

7. The hub motor end cover, flywheel and jump ring assembly machine according to claim 5, characterized in that a circular hole (28 a) vertically penetrating through the bottom wall of the strip-shaped groove (21 a) is formed on the bottom wall of the strip-shaped groove, the circular hole (28 a) and the circular arc surface (21 b) are coaxially arranged, and the inner diameter of the circular hole (28 a) is larger than the inner diameter of the jump ring (3) but smaller than the outer diameter of the jump ring (3); the correcting mechanism further comprises a correcting rod (22) coaxially arranged in the round hole (28 a), the upper end of the correcting rod (22) is a conical part (22 a) matched with the inner hole of the clamp spring (3), the diameter of the conical part (22 a) is gradually increased downwards, and a driving piece four (23) for driving the correcting rod (22) to lift is fixedly arranged on the frame (4).

8. The hub motor end cover, flywheel and jump ring assembly machine according to claim 7, characterized in that the pressing mechanism comprises a connecting seat (24) arranged on the plate-shaped part (9 a) in a sliding manner, a connecting frame (25) arranged on the connecting seat (24) in a sliding manner, a driving part five (26) for driving the connecting seat (24) to slide along the length direction of the plate-shaped part (9 a) and a driving part six (27) for driving the connecting frame (25) to lift, and a grabbing structure for grabbing the corrected jump ring (3) and a pressing structure for pressing the jump ring (3) on the grabbing structure into a jump ring groove of the end cover (1) are arranged on the connecting frame (25).

9. The hub motor end cover, flywheel and clamp spring assembly machine according to claim 8, wherein a mounting hole vertically penetrates through the bottom wall of the strip-shaped groove (21 a), a round sleeve (28) is inserted into the mounting hole, the inner hole of the round sleeve (28) is the round hole (28 a), and a lifting structure for driving the round sleeve (28) to lift is further arranged on the positioning frame (21); the grabbing structure comprises an expansion sleeve (31) and a driving piece seven (32) which are arranged on a connecting frame (25), the outer wall of the expansion sleeve (31) is matched with a clamp spring (3), the upper end of the expansion sleeve (31) is fixedly connected with the connecting frame (25), an outer supporting rod (33) is vertically arranged in the expansion sleeve (31), the upper end of the outer supporting rod (33) stretches out of the expansion sleeve (31) and is connected with the driving piece seven (32), the lower end of the expansion sleeve (31) is matched with the outer supporting rod (33) through a conical surface, the driving piece seven (32) is used for driving the outer supporting rod (33) to lift, and the expansion sleeve (31) can move to be coaxial with a correction rod (22).

10. The hub motor end cover, flywheel and jump ring assembly machine according to claim 9, characterized in that the material pressing structure comprises an extrusion frame (34) and a driving member eight (35) for driving the extrusion frame (34) to lift, and the driving member eight (35) is arranged on the connecting frame (25); the bottom wall of the extrusion frame (34) is a pressing plate part (34 a) which is horizontally arranged, and a yielding hole for the lower end of the expansion sleeve (31) to pass through is vertically arranged on the pressing plate part (34 a).

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