CN202255435U - Clamp used for internal-bracing sleeve - Google Patents

Abstract

A clamp for internally braced sleeves. The machine base top cover is installed on the machine base, and the machine base end cover is located in the central hole of the machine base top cover. The worm of the transmission mechanism is installed in the hole of the mounting table on the outer circumference of the machine base, and is vertically matched with the worm wheel of the feed mechanism; the shaft passes through the end cover of the machine base in the center hole of the top cover of the machine base, and one end is located The other end is located in the bearing seat in the center of the machine base. The feeding mechanism is installed in the machine base. The worm gear of the feed mechanism is sleeved on the shaft; the first sleeve and the second sleeve of the feed mechanism are located in the machine base and are sleeved on the shaft. The worm gear is sleeved on the shaft and located between the first sleeve and the second sleeve. The clamping mechanism is located on the upper surface of the top cover of the base and is sleeved on the shaft. The slopes at both ends of the elastic sleeve cooperate with the outer surfaces of the left-handed cone and the right-handed cone respectively. The intermittent stable movement of the worm shaft is realized by the torque limiting mechanism. The utility model has the characteristics of simple structure, safety and reliability and convenient use.

Description

A clamp for inner support sleeve

technical field

The invention relates to the field of measuring sleeve parts, in particular to a fixture for positioning and clamping the inner circle of the sleeve parts and measuring the shape of the sleeve parts. the

Background technique

At present, there are many kinds of fixtures for socket parts, such as self-centering spring socket fixtures, back-pull socket chucks and flexible self-centering fixtures. Among them, "Metal Processing" No. 3, 2010 "Processing Thin-walled Long Tube Parts with Self-Centering Spring Sleeve Fixtures" has greatly improved the axial positioning method of the sleeve-type parts fixture, which improves the sleeve The coaxiality requirements for the clamping of such parts, but the power transmission part is still the traditional tie rod. The pull rod directly drives the spring sleeve through linear motion to control the clamping and loosening of the sleeve-type parts fixture, leaving the sleeve-type parts fixture clamp The tight buffer operation space is relatively small, and the sleeve-type parts fixture disclosed in the article is a pneumatic fixture, and the force of the clamping part is controlled by adjusting the size of the gas pressure, which is not convenient for micro-operation of the sleeve-type parts fixture , which increases the possibility of damage to the shape of the part. the

Contents of the invention

In order to overcome the deficiencies in the prior art that are not suitable for micro-motion operations and easily damaged parts, the present invention proposes an inner support type sleeve-like parts fixture. the

The invention comprises a machine base, a top cover of the machine base, a shaft, an end cover of the machine base, a clamping mechanism, a feeding mechanism, a transmission mechanism and a torque limiting mechanism. The clamping mechanism includes a left-handed cone, a guide pin, a right-handed cone, a screw sleeve, an elastic sleeve and a pressure sleeve. The feeding mechanism includes a screw sleeve, a first sleeve and a second sleeve. The transmission mechanism includes a worm wheel, a worm, a handle bolt, a handle retaining ring, a hand wheel retaining ring, a handle, a spring, a driving friction wheel, a friction wheel end cover, a driven friction wheel, a bearing bracket, a first bearing limit sleeve, a second Two bearing limit sleeves and worm end caps. The torque limiting mechanism includes a handle, a handle retaining ring and a handle bolt, a spring, a driving friction wheel and a driven friction wheel. in:

The machine base top cover is installed on the machine base, and the machine base end cover is located in the central hole of the machine base top cover. The worm of the transmission mechanism is installed in the hole of the mounting table on the outer circumference of the machine base, and is vertically matched with the worm wheel of the feed mechanism; the shaft passes through the end cover of the machine base in the center hole of the top cover of the machine base, and one end is located The other end is located in the bearing seat in the center of the machine base. the

The feeding mechanism is installed in the machine base. The worm gear of the feed mechanism is set on the shaft; the second sleeve of the feed mechanism is set on the shaft at one end of the bearing seat. Both the first sleeve and the second sleeve are located in the machine base and fitted on the shaft. The worm gear is sleeved on the shaft and is located between the first sleeve and the second sleeve. the

The clamping mechanism is located on the upper surface of the top cover of the base and is sleeved on the shaft. The threaded sleeve is located on the shaft above the frame. Both the left-handed cone and the right-handed cone are set on the screw sleeve, and the left-handed cone is installed on the left thread part of the screw sleeve, and the right-handed cone is installed on the right thread part of the screw sleeve. The guide pin passes through the through holes on the left-handed cone, the right-handed cone and the top cover of the machine base, and the left-handed cone and the right-handed cone are positioned and connected to the top cover of the machine base. The elastic sleeve is set on the left-handed cone and the right-handed cone, and the elastic sleeve is fixed on the top cover of the machine base through the pressure sleeve. The transition fit between the elastic sleeve and the left-handed cone and the right-handed cone; the clearance fit between the guide pin and the left-handed cone and the right-handed cone. the

The worm of the transmission mechanism is loaded into the through hole on the transmission mechanism installation table on the outer circumference of the machine base through the bearing bracket. One end of the worm is located in the center hole of the worm end cover, and the other end of the worm is located in the center hole of the driving friction wheel. The driving friction wheel and the driven friction wheel are set on the worm with one end of the first bearing limiting sleeve, and are located between the outer circular surface of the worm and the inner circular surface of the first bearing limiting sleeve. And one end surface of the driving friction wheel is bonded to one end surface of the friction wheel end cover. The driving friction wheel and the driven friction wheel are meshed through the teeth on their mating end faces. The spring is sheathed on the worm and is located in the center hole of one end face of the driving friction wheel. The handle of the torque limiting mechanism is sleeved on one end of the driving friction wheel. the

A worm end cover is fixedly installed on one end surface of the bearing bracket in the transmission mechanism, and a friction wheel end cover is fixedly installed on the other end surface of the bearing bracket. The first bearing limiting sleeve is located between one bearing and the end cover of the friction wheel, and the second bearing limiting sleeve is located between the two bearings. The spring is sheathed on the worm and is located in the center hole of one end face of the driving friction wheel. the

40 teeth are evenly distributed on one end surface of the active friction wheel. The cross section of each tooth is a right triangle, and the tooth height is formed by the right angle sides of the right triangle. The angle between each tooth right-angle side and the hypotenuse is 70°. The right-angled side of the tooth section on the end surface of the active friction wheel is parallel to the axis of the active friction wheel. The diameter of the shaft hole at the other end of the driving friction wheel is the same as the outer diameter of the spring. the

There are 40 teeth evenly distributed on the end surface of the mating end of the driven friction wheel and the driving friction wheel, and the cross-section of each tooth is a right triangle, and the tooth height is formed by the right angle sides of the right triangle. The angle between each tooth right-angle side and the hypotenuse is 70°. The right-angled side of the tooth section on the end face of the driven friction wheel is parallel to the axis of the driving friction wheel. the

The teeth of the driven friction wheel mesh directly with the teeth of the driving friction wheel. the

Both the left-handed cone and the right-handed cone have a variable-diameter outer surface, that is, the outer surfaces of the left-handed and right-handed cones are inclined planes. The threaded through hole of the left-handed cone is a left-handed thread, and the threaded through hole of the right-handed cone is a right-handed thread. The left-handed cone is installed on the left thread part of the screw sleeve, and the right-handed cone is installed on the right thread part of the screw sleeve. Two guide pin holes penetrating through the surface of the disk are symmetrically distributed on both sides of the threaded through hole in the center of the left-handed cone and the right-handed cone. the

On the sleeve of the elastic sleeve, there are three deformation grooves. The length of the deformation groove runs through the length of the elastic sleeve. on the circumference. There are also three deformation grooves on the flange side of the elastic sleeve. The length of the deformation grooves runs through the flange side of the elastic sleeve. on the circumference of the edge. The positions of the deformation grooves on the elastic sleeve and the deformation grooves on the flange of the elastic sleeve are staggered on the circumference of the elastic sleeve, and the deformation grooves on the flange side of the elastic sleeve are respectively located on the two adjacent sides of the elastic sleeve. The bisector of the included angle of the deformation groove. Both ends of the inner hole of the elastic sleeve are variable-diameter holes, and the middle part is an equal-diameter hole, so that the surfaces of the inner holes at both ends of the elastic sleeve are inclined surfaces that expand outward; Cooperate. the

The clamping principle of the clamping part: the initial position is that the left-handed cone and the right-handed cone are in the middle of the screw sleeve. Since the elastic sleeve and the left-handed and right-handed cones are transition fit, when the sleeve is placed Parts, due to the uniform elastic deformation characteristics of the tapered surface of the elastic sleeve, the elastic sleeve, the left-handed cone and the right-handed cone will squeeze the sleeve parts evenly, and the worm wheel rotates counterclockwise to drive the screw sleeve. Rotating counterclockwise, the left-handed cone and the right-handed cone move up and down along the guide pins respectively, and the conical surface of the elastic sleeve is misaligned with the conical surfaces of the left-handed and right-handed cones, forcing the spring petals of the spring sleeve to move The heart shrinks evenly to clamp sleeve parts. the

The torque limiting mechanism is composed of handle, handle retaining ring, handle bolt, spring, driving friction wheel and driven friction wheel to ensure the intermittent and stable movement of the worm shaft, and compress sleeve parts between the elastic sleeve and the left-handed and right-handed cones. Finally, turn the handle to make the clamp clamp the sleeve parts and give a certain pre-tightening force. The appropriate pre-tightening force ensures the normal operation and size of the sleeve parts. Turning the handle bolt can adjust the size of the pre-tightening force. Controlling this example will not change the size of precision sleeve parts due to overfixing. the

The principle of the torque limiting mechanism of the feed part: it is completed by the cooperation of the right-angled triangle tooth shape of the active friction wheel and the driven friction wheel. Under the condition of setting the pre-tightening force, the clockwise rotation of the active friction wheel causes the oblique triangle tooth shape of the active friction wheel. The side and the hypotenuse of the driven friction wheel’s right-angled triangle tooth shape are staggered to push the active friction wheel back and compress the spring. After the active friction wheel rotates a tooth shape, the spring force pushes the active friction wheel forward. The hypotenuses of the shape are close together again, and the invalid rotation of 3-4 circles in this form can ensure that the sleeve parts are clamped with a given pre-tightening force, and the outer surface of the parts can be better protected. When the driving friction wheel rotates counterclockwise, the right-angled side of the right-angled triangle tooth shape of the driving friction wheel and the right-angled side of the right-angled triangle tooth shape of the driven friction wheel, so that the driven friction wheel rotates counterclockwise with the driving friction wheel to realize the opening of the sleeve Parts fixture, take out the part. The invention has the characteristics of simple structure, safety, reliability and convenient use. the

Description of drawings

Accompanying drawing 1 is the front view of the schematic diagram of the fixture structure of the inner supporting sleeve type parts;

Accompanying drawing 2 is the plan view of the schematic diagram of the fixture structure of the inner supporting sleeve type parts;

Accompanying drawing 3 is the structural representation of feed mechanism;

Accompanying drawing 4 is the structural representation of support;

Accompanying drawing 5 is the structural representation of active friction wheel;

Accompanying drawing 6 is the structural representation of machine base top cover;

Accompanying drawing 7 is the structural representation of pressure sleeve;

Accompanying drawing 8a, Fig. 8b are the structural representations of elastic sleeve; Wherein Fig. 8a is a three-dimensional schematic diagram, Fig. 8b is a sectional view;

Accompanying drawing 9a, Fig. 9b are the structure schematic diagrams of conical disk; Wherein Fig. 9a is main view, Fig. 9b is top view. In the picture:

1. Machine base 2. Machine base top cover 3. Compression sleeve 4. Elastic sleeve 5. Left-handed cone disc

6. Guide pin 7. Right-handed cone 8. Screw retaining ring 9. Screw sleeve 10. Shaft

11. Frame end cover 12. Worm gear 13. First sleeve 14. Retaining ring 15. Bearing end cover

16. Second sleeve 17. Worm 18. Handle bolt 19. Handle retaining ring 20. Handwheel retaining ring

21. Handle 22. Spring 23. Active friction wheel 24. Friction wheel end cover 25. Driven friction wheel

26. The first bearing limit sleeve 27. Round nut 28. Bearing bracket 29. Worm shaft sleeve

30. Second bearing limit sleeve 31. Bearing 32. Worm end cover

Detailed ways

This example is a fixture for inner-supported sleeve parts, which is used for clamping and testing sleeve parts. the

As shown in Figure 1 and Figure 2. This example includes a machine base 1, a machine base top cover 2, a shaft 10, a machine base end cover 11, a clamping mechanism, a feed mechanism, a transmission mechanism and a torque limiting mechanism, wherein the machine base top cover 2 is installed on the machine base 1, The base end cover 11 is located in the center hole of the base cover 2, and the bearing seat of the shaft 10 is located in the center hole of the base 1, and is fastened by the bearing end cover 15. The clamping mechanism is installed on the top cover 2 of the machine base, and the feeding mechanism is installed in the machine base 1. The clamping mechanism and the feeding mechanism respectively complete the introduction of clamping sleeve parts and external force. There is an installation platform of the transmission mechanism on the outer circumference of the machine base 1 , and the installation table is tangent to the circumferential surface of the machine base 1 . the

As shown in FIG. 4 , the base 1 is a circular shell for supporting the entire fixture. There is a boss in the center of the inner bottom of the machine base 1. There is a stepped hole in the center of the boss. There are 4 threaded through holes on the outer edge of the boss, which are used to install the bearing end cover 15 to fix the bearing. The small diameter of the stepped hole is the same as the outer diameter of the bearing assembled on the shaft 10, the large diameter of the stepped hole is the same as the outer diameter of the bearing end cover 15, and the bearing end cover 15 is embedded in the large hole and fixed by bolts. There is a connection hole for the base top cover 2 on the end face of the groove wall of the base 1 . The bottom of the base 1 has a radially outwardly extending flange through which the base is fixed to other equipment. On the outer peripheral surface of support 1, there is a boss protruding from the peripheral surface, and the surface of the boss forms the mounting table of the transmission mechanism, and the mounting table is tangent to the peripheral surface. There is a through hole on the mounting table, the center line of the through hole is perpendicular to the mounting table, and the vertical distance between the center line and the center line of the base 1 is the sum of the pitch circle radii of the worm screw 17 and the worm wheel 12 . The through holes described in the ring on the mounting table are evenly distributed with threaded connection holes of the bearing bracket 28, and the bearing bracket 28 of the feed mechanism passes through the through hole of the mounting table and is fixed to the support 1 by bolts. the

As shown in FIG. 6 , the base cover 2 is a circular plate whose outer diameter is the same as that of the base 1 . There is a mounting boss in the center of the inner surface of the top cover 2 of the base, and there are 2 guide pin holes symmetrically distributed on both sides of the bearing hole on the mounting boss, and 4 guide pins 6 are evenly distributed around each guide pin hole. Threaded hole. There is a groove in the center of the outer surface of the base top cover 2, and the diameter of the groove is the same as the outer diameter of the left-handed cone. There is a stepped through hole in the center of the base top cover 2, and in the central through hole of the base top cover 2, there is a mounting hole for the base end cover 11 on the plane formed by the steps. The major diameter of the stepped center through hole of the base top cover 2 is the same as the outer diameter of the base end cover 11, and the minor diameter of the through hole is the same as the outer diameter of the bearing seat. There are 6 installation holes of the machine base 1 at the outer edge of the machine base top cover 2, and inside the installation holes of the machine base 1, there are evenly distributed mounting holes of the pressure sleeve 3. the

The base end cover 11 is circular. There is a through hole matched with the shaft 10 at the center of the base end cover 11 . There is an axially protruding annular boss on one surface of the end cover 11 of the machine base, which is used for axial positioning of the outer ring of the bearing. There are 6 countersunk holes evenly distributed on the outer edge of the end cover 11 of the machine base, which are used to connect the end cover 11 of the machine base with the top cover 2 of the machine base. the

The shaft 10 is a stepped shaft, and the outer diameter of one end of the shaft 10 is the same as the inner diameter of the screw sleeve 9, and the end face has a screw hole for installing the screw sleeve retaining ring 8; the outer diameter of the other end of the shaft 10 is the same as that of the screw sleeve 9. The inner diameter of the second sleeve 16 is the same, and there are two screw holes on the end face, which are used to install the retaining ring 14; Fitting, the small diameter step fits into the inner hole of the housing. the

The feeding mechanism includes a shaft 10, a screw sleeve 9, a first sleeve 13, a second sleeve 16, and a bearing seat. Axle 10 passes the machine base end cover 11 in the center hole of machine base top cover 2, and one end is positioned at the screw sleeve 9, and the other end is positioned at the bearing block of machine base 1 center. Both the first sleeve 13 and the second sleeve 16 are located in the machine base 1 and are sleeved on the shaft 10 . The worm gear 12 is sleeved on the shaft 10 and located between the first sleeve 13 and the second sleeve 16 . Worm screw 17 cooperates vertically with worm wheel 12. the

The transmission mechanism includes a worm wheel 12, a worm screw 17, a handle bolt 18, a handle retaining ring 19, a hand wheel retaining ring 20, a handle 21, a spring 22, a driving friction wheel 23, a friction wheel end cover 24, a driven friction wheel 25, a bearing bracket 28, The worm shaft sleeve 29 , the first bearing limiting sleeve 26 , the second bearing limiting sleeve 30 and the worm end cover 32 . the

Bearing bracket 28 is packed in the through hole on the transmission mechanism mounting table surface on the outer circumference of machine base 1. A worm end cover 32 is fixedly installed on the end face of the bearing bracket 28, and a friction wheel end cover 24 is fixedly installed on the other end face of the bearing bracket 28; the inner diameter of the bearing bracket 28 is identical with the outer diameter of the bearing 31. The worm 17 is loaded into the bearing bracket 28 , one end of the worm 17 is located in the center hole of the worm end cover 32 , and the other end of the worm 17 is located in the center hole of the driving friction wheel 23 . A pair of bearings 31 are sleeved on the worm 17 and are respectively located at the end of the worm 17 close to the end cover 32 of the worm and the middle of the worm 17 . The first bearing limit sleeve 26 and the second bearing limit sleeve 30 are installed in the bearing bracket 28; Cooperate. The second bearing limiting sleeve 30 is located between two bearings 31 , and the first bearing limiting sleeve 26 is located between one bearing and the friction wheel end cover 24 . The driving friction wheel 23 and the driven friction wheel 25 are sleeved on the worm 17 with one end of the first bearing limiting sleeve 26 , and are located between the outer surface of the worm 17 and the inner surface of the first bearing limiting sleeve 26 . And an end surface of the flange edge on the outer circumference of the driving friction wheel 23 fits with an end surface of the friction wheel end cover 24; the driving friction wheel 23 and the driven friction wheel 25 engage with each other through the teeth on the end surfaces of the driving friction wheel 23. The spring 22 is sleeved on the worm 17 and located in the center hole of one end face of the driving friction wheel 23 . The handle 21 is sleeved on one end of the driving friction wheel 23 ; one end surface of the handle 21 is attached to the other end surface of the flange edge on the outer circumference of the driving friction wheel 23 . In the groove on the end surface of the handle 21 , a handwheel stop ring 20 is installed for fixing the spring 22 in the central hole on the end surface of the driving friction wheel 23 . The handle retaining ring 19 is placed in the groove on the end face of the handle 21, and the outer circular surface of the handle retaining ring 19 fits with the inner wall of the center groove of the handle 21 to fix the hand wheel retaining ring 20 in the concave groove on the end face of the handle 21. In the groove; the handle bolt 18 passes through the center hole of the handle retaining ring 19, is installed in the center hole of the end face of the worm 17, and the handle 21 is fastened on one end of the worm 17. the

The worm screw 17 is packed into a bearing bracket 28, and the bearing bracket 28 provides a rotating support for the worm screw 17. The distance between the two supporting bearings in the bearing bracket 28 is realized by the friction wheel end cover 24, the first bearing stop sleeve 26, the round nut 27, the worm shaft sleeve 29, the second bearing stop cover 30 and the worm end cover 32. Constant, the constant distance between the two support bearings ensures the stable rotation of the worm shaft, the round nut 27 is threaded with the worm shaft 17, and the internal parts of the friction wheel end cover 24 and the worm end cover 32 sleeve provide a sealed working environment. the

The torque limiting mechanism includes a handle 21 , a handle retaining ring 19 and a handle bolt 18 , a spring 22 , a driving friction wheel 23 and a driven friction wheel 25 . The torque limiting mechanism is used to ensure the stable movement of the worm 17 with the set slipping torque. When adjusting the slipping torque, turn the handle bolt 18 to adjust the position of the handle stop ring 19, and change the elongation of the spring 22, thereby realizing the adjustment of the slipping torque. When the torque of the rotating handle 21 exceeds the preset slipping torque, the external force of the rotating handle 21 cannot be transmitted to the worm 17, thereby ensuring the safety of the clamping of the sleeve parts and preventing damage to the sleeve parts due to misuse surface and shape. In a torque limiting mechanism:

The handle 21 is a hollow revolving body, and the inner hole is a stepped through hole, which is connected with the driving friction wheel 23 through a key at the small aperture end, and directly drives the driving friction wheel 23 to rotate. the

As shown in FIG. 5 , there is a radially protruding flange in the middle of the driving friction wheel 23 , and there is a through shaft hole in the center of the driving friction wheel 23 , and the diameter of the shaft hole is the same as the outer diameter of the worm 17 . 40 teeth are evenly distributed on the end surface of the active friction wheel 23; the cross section of each tooth is a right triangle, and the tooth height is formed by the right angle sides of the right triangle. In this embodiment, the tooth height is 1.44mm; The included angles of the hypotenuses are both 70°. The right-angled side of the tooth section on the end face of the active friction wheel 23 is parallel to the axis of the active friction wheel. The outer circular surface of the other end of the driving friction wheel 23 has a keyway, and the diameter of the shaft hole at this end is the same as the outer diameter of the spring 22 . the

The driven friction wheel 25 is also a hollow rotating body. The outer diameter of the driven friction wheel 25 is the same as the inner diameter of the first bearing limiting sleeve 26 , and the inner diameter of the driven friction wheel 25 is the same as the outer diameter of the worm 17 . There are 40 teeth evenly distributed on the end face of the driven friction wheel 25 and the driving friction wheel 23, and the cross-section of each tooth is a right triangle, and the tooth height is formed by the right angle sides of the right triangle. In this embodiment, the teeth The height is 1.44mm; the included angle between the right-angled side and the hypotenuse of each tooth is 70°. The right-angled side of the tooth section on the end face of the driven friction wheel 25 is parallel to the axis of the driving friction wheel. Driven friction wheel 25 is connected with worm screw 17 by key, thereby drives worm screw 17 to rotate. the

The teeth of the driven friction wheel mesh directly with the teeth of the driving friction wheel. the

The friction wheel end cover 24 is annular, and the center of the friction wheel end cover 24 has a through hole that fits with the worm screw 17. There are 6 countersunk holes evenly distributed on the outer edge of the friction wheel end cover 24, which are used to block the first A bearing limit sleeve 26 prevents it from moving along the axial direction of the worm screw 17 . The shape of the worm end cover 32 is similar to that of the machine base end cover 11, but the size is slightly different, and it is used for the axial positioning of the outer ring of the bearing. the

The bearing bracket 28 is in the shape of a sleeve, and one end has a radially protruding connecting flange, and 6 countersunk holes are evenly distributed on the flange, which are used to fix the bearing bracket 28 on the transmission mechanism on the machine base 1. There are 6 threaded holes evenly distributed along the circumferential direction on both end surfaces of the main body of the bearing bracket 28 for installing the table top, and are respectively used to fix the friction wheel end cover 24 and the worm end cover 32 on the bearing bracket 28 . the

The worm 17 is a stepped shaft, and there is a threaded hole on the end surface of the end with a small diameter, so that the handle retaining ring 19, the handle retaining ring 20, the spring 22, the driving friction wheel 23, and the driven friction wheel 25 are fixed in sequence through the handle bolt 18. On the small end of the worm screw 17 rod diameter, the driving friction wheel 23 is relatively matched with the driven friction wheel 25 toothed parts. The second step shaft rod at one end with a small rod diameter is a thread for installing a round nut 27, and the round nut 27 is used to fix the axial position of the inner ring of the bearing installed on the third step shaft rod, and the other end is a worm. the

The torque limiting mechanism is composed of the handle 21, the handle retaining ring 19, the handle bolt 18, the spring 22, the driving friction wheel 23, and the driven friction wheel 25 to ensure the stable movement of the worm shaft with a given torque, and it will rotate if it exceeds the predetermined torque. The external force of the handle 21 cannot be transmitted to the worm screw 17, thereby ensuring the safety of the clamping of the sleeve parts, and the surface and shape of the sleeve parts will not be damaged due to human misoperation. After the elastic sleeve 4, the left-handed cone 5, and the right-handed cone 7 press the sleeve parts in this example, the handle 21 is turned to make the clamp clamp the sleeve parts with a preset pre-tightening force. To ensure the normal operation of the sleeve parts, the size of the pre-tightening force can be adjusted by turning the handle bolt 18, so that the size of the precision sleeve parts will not be changed due to over-fixing. the

The principle of the torque limiting mechanism: it is completed by the right-angled triangle tooth shape motion of the driving friction wheel 23 and the driven friction wheel 25 . When the preload is set, the clockwise rotation of the active friction wheel 23 causes friction between the hypotenuse of the right-angled triangular tooth profile of the active friction wheel 23 and the hypotenuse of the right-angle triangular tooth profile of the driven friction wheel 25 to drive the active friction wheel 23 to retreat and compress. After the spring 22 and the driving friction wheel 23 rotate a tooth shape, the elastic force of the spring 22 pushes the driving friction wheel 23 forward, and the hypotenuses of the driving friction wheel 23 and the driven friction wheel 25 are closely attached to each other again, and the rotation is invalid in this form 3-4 circles can ensure that the sleeve parts are clamped with a given pre-tightening force, so as to ensure the safety of the sleeve parts. When the driving friction wheel 23 rotates counterclockwise, the right-angled side of the right-angled triangle tooth shape of the driving friction wheel 23 and the right-angled side of the right-angled triangle tooth shape of the driven friction wheel 25 offset, so that the driven friction wheel 25 rotates counterclockwise with the driving friction wheel 23 to realize Open the clamp for sleeve parts and take out the parts. the

The clamping mechanism includes a left-handed cone 5 , a guide pin 6 , a right-handed cone 7 , a screw retaining ring 8 , a screw 9 , an elastic sleeve 4 and a pressure sleeve 3 . The screw sleeve 9 is sleeved on the shaft 10 located above the machine base 1 . The left-handed cone 5 and the right-handed cone 7 are all sleeved on the screw sleeve 9. Guide pin 6 passes through the through hole on the left-handed cone 5, the right-handed cone 7 and the base top cover 2, and the left-handed cone 5, the right-handed cone 7 and the base top cover 2 are positioned and connected. The elastic sleeve 4 is set on the left-handed cone 5 and the right-handed cone 7, and is tightened by the pressure sleeve 3. The guide pin 6 passes through the guide pin hole on the base top cover 2 and is fixed on the base cover 2 by bolts. The guide pin 6 provides guidance for the movement of the left-handed cone 5 and the right-handed cone 7 . The bearing is installed in the bearing hole of the machine base top cover 2, the shaft 10 passes through the bearing inner hole, and the shaft 10 can rotate in the machine base top cover 2 through the bearing bracket shaft 10, where the bearing passes through the machine base end cover 11 and the first The sleeve 13 is fixed in position. The screw sleeve 9 is installed on the end of the shaft 10 with a large diameter, and the grooved end of the screw sleeve 9 is installed outside the end of the shaft 10 with a large shaft diameter. The screw sleeve retaining ring 8 is fixed on the end of the shaft 10 by screws to compress the screw sleeve 9. The screw sleeve retaining ring 8 ensures that the screw sleeve 9 cannot move up and down along the shaft 10. The left-handed cone 5 is installed on the left-threaded part of the screw sleeve 9, and the right-handed cone 7 is installed on the right-threaded part of the screw sleeve 9. Both the left-handed cone 5 and the right-handed cone 7 pass through the guide pin 6, and there is a clearance fit between them. . The compression sleeve 3 fixes the elastic sleeve 4 on the top cover of the machine base 2 through bolts. The transition fit between the elastic sleeve 4 and the left-handed cone 5 and the right-handed cone 7 is used for clamping the sleeve parts. . The frame end cover 11 , the first sleeve 13 , the second sleeve 16 , the retaining ring 14 and the bearing end cover 15 ensure that the worm wheel 12 is in a position accurately matched with the worm shaft 17 . the

In the clamping mechanism described:

Both the left-handed cone 5 and the right-handed cone 7 have a variable-diameter outer surface, that is, the outer surfaces of the left-handed cone 5 and right-handed cone 7 are sloped. The center of left-handed cone 5 and right-handed cone 7 has a threaded through hole, the diameter of this through hole is the same as the outer diameter of screw sleeve 9, and the threaded through hole of left-handed cone 5 is a left-handed thread, the right-handed cone 7 The threaded through hole is right-handed. Two guide pin holes penetrating through the disk surface are symmetrically distributed on both sides of the threaded through hole at the center of the left-handed cone 5 and the right-handed cone 7 . the

The outer diameter of guide pin 6 is identical with the inner diameter of the guide pin holes on the left-handed cone 5 and the right-handed cone 7, and one end of guide pin 6 has a radially protruding connecting flange, on which flanges are evenly distributed. Bolt hole. the

The screw sleeve 9 is a hollow rotating body whose inner diameter is the same as the outer diameter of the shaft 10, and is fixed on the shaft 10 by a key. The screw sleeve 9 is packed into the center hole of the left-handed cone 5 and the right-handed cone 7, and threaded with the left-handed cone 5 and the right-handed cone 7. The thread of the matching part of the screw sleeve 9 and the left-handed cone 5 is a left-handed thread, and the thread of the matching part of the screw sleeve 9 and the right-handed cone 7 is a right-handed thread. The outer circular surface of the middle part of the screw sleeve has a thread undercut. the

The pressure sleeve 3 is annular, and its inner hole is stepped. The minimum inner diameter and the maximum inner diameter of the pressure sleeve 3 are respectively in clearance fit with the outer diameter of the sleeve of the elastic sleeve 4 and the outer diameter of the flange side. The mounting holes of the organic seat top cover 2 are evenly distributed on the end face of one end of the pressure sleeve 3 . the

The elastic sleeve 4 is also in the shape of a ring, and is made into a centering and clamping three-lobe structure, so that the elastic sleeve 4 can produce uniform elastic deformation after being subjected to an external force, so as to realize automatic centering and compression of the workpiece. The specific structural features of the elastic sleeve 4 are described as follows: There is a radially protruding flange edge on the sleeve end surface of the elastic sleeve 4 . The outer diameter of the sleeve of the elastic sleeve 4 and the outer diameter of the flange are slightly smaller than the minimum inner diameter and the maximum inner diameter of the pressure sleeve 3 respectively. On the sleeve of the elastic sleeve 4, there are three deformation grooves. The length of the deformation grooves runs through the length of the elastic sleeve sleeve. on the circumference of the cylinder. On the flange side of the elastic sleeve 4, there are also three deformation grooves. The length of the deformation grooves runs through the flange side of the elastic sleeve. 4 on the circumference of the flange. The deformation grooves on the elastic sleeve sleeve and the deformation grooves on the flange side of the elastic sleeve are staggered on the circumference of the elastic sleeve 4, and the deformation grooves on the flange side of the elastic sleeve are respectively located on two adjacent sides of the elastic sleeve sleeve The bisector of the included angle of the deformation slots. Both ends of the inner hole of the elastic sleeve 4 are variable-diameter holes, and the middle part is an equal-diameter hole, so that the surfaces of the inner holes at both ends of the elastic sleeve 4 are inclined surfaces that expand outward. The slopes at both ends of the elastic sleeve 4 cooperate with the outer surfaces of the left-handed cone 5 and the right-handed cone 7 respectively. the

Both the screw retaining ring 8 and the retaining ring 14 are disc-shaped. There are screw sinking grooves in the center of the screw sleeve retaining ring 8; 2 screw sinking grooves are arranged on the end face of the retaining ring 14. The screw sleeve retaining ring 8 is installed in the screw sleeve 9 and is located at one end of the shaft 10 . The retaining ring 14 is installed in the bearing end cover 15 and located at the other end of the shaft 10 . the

When working, the initial position of the clamping mechanism is that the left-handed cone 5 and the right-handed cone 7 are in the middle of the screw sleeve 9. Originally, there is a transition fit between the elastic sleeve 4, the left-handed cone 5, and the right-handed cone 7. When putting in the sleeve parts, due to the uniform elastic deformation characteristics of the tapered surface of the elastic sleeve 4, the elastic sleeve 4, the left-handed cone 5 and the right-handed cone 7 jointly and evenly squeeze the sleeve parts, At this time, the power introduced by the handle 21 makes the worm wheel 12 rotate counterclockwise to drive the screw sleeve 9 to rotate counterclockwise. The left-handed cone 5 and the right-handed cone 7 move up and down along the guide pin 6 respectively, and the tapered surface of the elastic sleeve 4 Dislocation movement with the conical surface of the left-handed cone 5 and right-handed cone 7 forces the spring petals of the spring sleeve to shrink evenly to the center to clamp the sleeve parts to ensure the circumference of the sleeve parts. the

The motion process of this example includes two motion processes: placing and clamping the part and opening the fixture and taking out the part. the

When placing and clamping the parts, adjust the handle bolt 18 to set the required pretightening force in this example, and turn the handle 21 so that the left-handed cone 5 and the right-handed cone 7 are in the middle of the screw sleeve 9 . Place the sleeve parts between the elastic sleeve 4, the cone 5, and the right-handed cone 7, and turn the handle 21 clockwise. The rotation of the handle 21 drives the driving friction wheel 23 to rotate, and the torque limiting mechanism drives the worm shaft 17 to rotate. The rotation of the worm shaft 17 drives the worm wheel 12 to rotate, the rotation of the worm wheel 12 drives the shaft 10 to rotate, the rotation of the shaft 10 drives the screw sleeve 9 to rotate, and the rotation of the screw sleeve 9 drives the left-handed cone 5 and the right-handed cone 7 to extend the guide pin 6 respectively Moving downwards and upwards, the distance between the elastic sleeve 4, the cone 5, and the right-handed cone 7 will be reduced until the handle 21 is turned to hear 3-4 clicking sounds, so that the operation of the torque limiting mechanism reaches the preset value. Tightening force, thereby clamping sleeve parts. the

When opening the fixture and taking out the parts, turn the handle 21 counterclockwise, the rotation of the handle 21 drives the active friction wheel 23 to rotate, and the torque limiting mechanism drives the worm shaft 17 to rotate, the rotation of the worm shaft 17 drives the worm wheel 12 to rotate, and the rotation of the worm wheel 12 drives the 10 rotates, the rotation of the shaft 10 drives the screw sleeve 9 to rotate, and the rotation of the screw sleeve 9 drives the left-handed cone 5 and the right-handed cone 7 to move upward and downward respectively along the guide pin 6, then the elastic sleeve 4 and the left-handed cone 5 1. The distance between the right-handed cones 7 increases until the left-handed cones 5 and 7 are in the middle of the screw sleeve 9, and the sleeve parts are taken out. the

Claims (7)

1. A clamp for inner support type sleeve, it is characterized in that, comprises machine base, machine base top cover, axle, machine base end cover, clamping mechanism, feed mechanism, transmission mechanism and torque limiting mechanism; The clamping mechanism includes a left-handed cone, a guide pin, a right-handed cone, a screw sleeve, an elastic sleeve and a compression sleeve; the described feeding mechanism includes a screw sleeve, a first sleeve and a second sleeve; the described The transmission mechanism includes worm gear, worm screw, handle bolt, handle retaining ring, hand wheel retaining ring, handle, spring, driving friction wheel, friction wheel end cover, driven friction wheel, bearing bracket, first bearing limit sleeve, second bearing limit A bit sleeve and a worm end cover; the torque limiting mechanism includes a handle, a handle retaining ring and a handle bolt, a spring, a driving friction wheel and a driven friction wheel; wherein: a. The top cover of the machine base is installed on the machine base, and the end cover of the machine base is located in the center hole of the top cover of the machine base; the worm of the transmission mechanism is installed in the hole on the outer circumference of the machine base, and is connected with the feed mechanism. The worm gear fits vertically; the shaft passes through the end cover of the machine base in the center hole of the top cover of the machine base, one end is located in the screw sleeve of the feed mechanism, and the other end is located in the bearing seat in the center of the machine base; b. The feeding mechanism is installed in the machine base; the worm gear of the feeding mechanism is set on the shaft; the second sleeve of the feeding mechanism is set on the shaft at one end of the bearing seat; the first sleeve and the second sleeve are both located on the machine base Inside, and is set on the shaft; the worm gear is set on the shaft, and is located between the first sleeve and the second sleeve; c. The clamping mechanism is located on the upper surface of the top cover of the machine base and is set on the shaft; the screw sleeve is located on the shaft above the machine base; both the left-handed cone and the right-handed cone are set on the screw sleeve, and the left-handed cone In the left threaded part of the screw sleeve, the right-handed cone is installed on the right-handed part of the screw sleeve; the guide pin passes through the through holes on the left-handed cone, the right-handed cone and the top cover of the machine base, and the left-handed cone and the right-handed cone The disc and the top cover of the machine base are positioned and connected; the elastic sleeve is set on the left-handed cone disc and the right-handed cone disc, and the elastic sleeve is fixed on the top cover of the machine base through the pressure sleeve; Both are transition fit; between the guide pin and the left-handed cone and the right-handed cone are all clearance fits; d. The worm of the transmission mechanism is loaded into the through hole on the installation table of the transmission mechanism on the outer circumference of the machine base through the bearing bracket. One end of the worm is located in the center hole of the end cover of the worm, and the other end of the worm is located in the center hole of the driving friction wheel. Inside; the driving friction wheel and the driven friction wheel are set on the worm with one end of the first bearing limiting sleeve, and are located between the outer circular surface of the worm and the inner circular surface of the first bearing limiting sleeve; and one end surface of the driving friction wheel and the One end face of the end cover of the friction wheel fits; the driving friction wheel and the driven friction wheel mesh through the teeth on the matching end face; the spring is set on the worm and is located in the center hole of the end face of the driving friction wheel; the handle of the torque limiting mechanism is set on the One end of the active friction wheel. 2. A fixture for internally supported sleeve parts as claimed in claim 1, wherein a worm end cover is fixedly installed on one end surface of the bearing bracket in the transmission mechanism, and a friction wheel end is fixedly installed on the other end surface of the bearing bracket cover; the first bearing limiting sleeve is located between one bearing and the end cover of the friction wheel, and the second bearing limiting sleeve is located between the two bearings. the 3. A fixture for internally supported sleeve-like parts as claimed in claim 2, wherein the spring is sleeved on the worm and located in the center hole of one end face of the driving friction wheel. 4. The clamp of a kind of internal supporting sleeve type parts as claimed in claim 1, is characterized in that, 40 teeth are evenly distributed on the end surface of the driving friction wheel; the cross section of each tooth is a right triangle, and the The right-angled side forms the tooth height; the angle between the right-angled side and the hypotenuse of each tooth is 70°; the right-angled side of the tooth section on the end surface of the active friction wheel is parallel to the axis of the active friction wheel; the shaft hole diameter at the other end of the active friction wheel Same outer diameter as the spring. 5. A fixture for internally supported sleeve parts as claimed in claim 1, wherein 40 teeth are evenly distributed on the end faces of the driven friction wheel and the driving friction wheel, and the cross-section of each tooth and It is a right-angled triangle, and the tooth height is formed by the right-angled sides of the right-angled triangle; the included angle between each tooth’s right-angled side and the hypotenuse is 70°; 6. As claimed in claim 1, a clamp for internally supported sleeve parts, characterized in that, both the left-handed cone and the right-handed cone are discs with variable diameters on the outer surface, that is, the left-handed cone and the outer surface of the right-handed cone is a bevel; the threaded through hole of the left-handed cone is a left-handed thread, and the threaded through hole of the right-handed cone is a right-handed thread; The spiral cone is installed on the right-threaded part of the screw sleeve; two guide pin holes penetrating through the surface of the disk are symmetrically distributed on both sides of the threaded through hole in the center of the left-handed cone and the right-handed cone. 7. As claimed in claim 6, a clamp for internal supporting sleeve parts, wherein three deformation grooves are formed on the sleeve of the elastic sleeve, and the length of the deformation grooves runs through the length of the elastic sleeve sleeve , the direction of the deformation groove is consistent with the direction of the center line of the elastic sleeve, and is evenly distributed on the circumference of the elastic sleeve sleeve; on the flange side of the elastic sleeve, there are also three deformation grooves, the length of the deformation groove runs through the elastic The direction of the deformation groove is perpendicular to the centerline direction of the elastic sleeve, and is evenly distributed on the circumference of the flange edge of the elastic sleeve; the deformation groove on the elastic sleeve sleeve and the deformation groove on the flange edge of the elastic sleeve The positions on the circumference of the elastic sleeve are staggered, and the deformation grooves on the flange side of the elastic sleeve are respectively located on the bisector of the angle between two adjacent deformation grooves on the elastic sleeve; the two ends of the inner hole of the elastic sleeve are diameter reducing The middle part of the hole is an equal-diameter hole, so that the surfaces of the inner holes at both ends of the elastic sleeve are inclined surfaces that expand outward; the inclined surfaces at both ends of the elastic sleeve cooperate with the outer surfaces of the left-handed cone and the right-handed cone respectively. the

Images