CN111941054A - Automatic screw locking device - Google Patents

Abstract

The invention provides an automatic screw locking device, comprising: a plurality of cutter head assemblies connected to the same motor through a plurality of transmission assemblies; a clutch mechanism arranged on the transmission assembly and capable of causing the plurality of cutter head assemblies to rotate in linkage with the transmission assembly The first working state of the cutter head assembly, and the second working state of separating the cutter head assembly from its corresponding transmission assembly when the cutter head assembly is in a locked state. In this way, in the process that the same motor drives multiple cutter head assemblies to lock the screws, if some cutter head assemblies finish locking the screws first and remain locked with the screws, due to the clutch mechanism, this part of the cutter head assemblies and the corresponding transmission assemblies are connected. Therefore, it will not affect the motor to drive the remaining cutter head assemblies to continue to tighten the screws. Compared with the prior art, multiple screws can be locked in place at one time, which improves the reliability.

Description

An automatic screw locking device

technical field

The invention relates to the technical field of electric tools, in particular to an automatic screw locking device.

Background technique

Electric screwdrivers are electric tools for tightening and loosening screws. In actual production, it is often encountered that multiple screws need to be tightened at the same time. Generally, multiple independent electric screwdrivers must be set up. Since each electric screwdriver includes independent motors, transmission components and cutter head components, it not only takes up space large and expensive to produce.

In order to solve the above problems, Chinese patent document CN210849105U discloses an automatic locking and unloading screw device suitable for high-voltage pipe busbar fittings. As shown in FIG. 9, it includes a hollow main gear 01, and a plurality of hollow main gears 01 and The hollow secondary gears 02 are meshed with the hollow primary gear 01 respectively. The center of the hollow secondary gear 02 is provided with a bolt fixing sleeve 03. The second motor drives the hollow primary gear 01 to rotate, so as to drive multiple hollow secondary gears 02 to rotate in the same direction , and then make multiple bolt fixing sleeves 03 lock the bolts at the same time, because only one motor can realize the locking or dismantling of multiple bolts, so the structure is simpler, but the above scheme still has the following defects: due to the different bolts and nuts The number of thread turns will be different, and it is difficult to keep the initial thread opening position of the bolt and nut consistent, so that the number of turns of each bolt fixing sleeve 03 will be different when locking. When other bolt fixing sleeves 03 are locked in place, the bolt fixing sleeve 03 is blocked by the bolts and cannot rotate (that is, it is in a locked state), which results in that other hollow auxiliary gears 02 meshing with the hollow main gear 01 cannot rotate. , that is, other bolt fixing sleeves 03 cannot continue to lock. In addition, because the motor has the force that continues to drive the transmission assembly to rotate, the locked bolt fixing sleeve will generate reverse torque, resulting in damage to the transmission assembly and the motor. , reducing the service life.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the automatic locking and unloading screw device cannot lock multiple bolts in place at one time, the transmission assembly and the motor are easily damaged, and the service life is short, so as to provide a An automatic screw locking device that can lock multiple bolts in place.

To this end, the present invention provides an automatic screw locking device, including a cutter head assembly and a clutch mechanism, a plurality of cutter head assemblies are connected to the same motor through a plurality of transmission assemblies; A first working state in which a plurality of the cutter head assemblies rotate in conjunction with the transmission assembly, and a first working state in which the cutter head assemblies are separated from their corresponding transmission assemblies when the cutter head assemblies are in a locked state. 2. Working status.

The transmission assembly includes a rotating shaft and a transmission gear sleeved on the rotating shaft, the transmission gear has a central hole for the rotating shaft to pass through, and at least one installation extending radially and communicating with the central hole a hole, and the clutch mechanism is arranged in the installation hole.

The clutch mechanism includes a transmission part, an elastic part and a blocking part. The transmission member is movably installed in the installation hole through an elastic member, and the transmission member has a first position partially extending into the central hole to make the rotating shaft rotate in conjunction with the transmission gear, and a first position extending completely into the center hole. the second position where the rotating shaft is separated from the transmission gear; one end of the elastic piece is in contact with the transmission piece, and the other end is in contact with the blocking piece provided on the outer edge of the transmission gear, so The elastic member applies an elastic force to the transmission member to move it toward the first position.

The cross section of the rotating shaft includes an arc line segment and a straight line segment connecting two ends of the arc line segment, and the straight line segment can cooperate with the transmission member, so that the rotating shaft and the transmission gear rotate in conjunction with each other.

The blocking member is a bolt threadedly connected with the transmission gear.

The transmission gear is provided with a plurality of the installation holes evenly distributed along the circumferential direction thereof, and the clutch mechanism is arranged in the installation holes.

One end of the motor is provided with a power output shaft, and a main gear sleeved on the power output shaft and rotated in conjunction with the power output shaft, and the transmission assembly includes a secondary gear set connected with the main gear.

The transmission assembly further includes a first rotating shaft, a second rotating shaft, a first transmission gear and a second transmission gear, the first rotating shaft is sleeved with a first transmission gear arranged in linkage therewith, and the first rotating shaft is suitable for driving the knife The head assembly rotates; the second rotating shaft is sleeved with a first auxiliary gear and a second transmission gear meshed with the first transmission gear, the first auxiliary gear is connected with the main gear, and is connected with the first auxiliary gear. The two rotating shafts rotate in linkage, and the clutch mechanism is provided between the second transmission gear and the second rotating shaft.

The transmission assembly further includes a first rotating shaft, a second rotating shaft, a first transmission gear and a second transmission gear, the first rotating shaft is sleeved with a first transmission gear, and the first rotating shaft is suitable for driving the cutter head assembly to rotate, The clutch mechanism is arranged between the first transmission gear and the first rotating shaft; the second rotating shaft is sleeved with a first auxiliary gear and a second transmission gear that rotate in conjunction with the follower, and the first auxiliary gear is connected to the second rotating shaft. The main gear is connected, and the second transmission gear is meshed with the first transmission gear.

The auxiliary gear set includes second auxiliary gears which are arranged between two adjacent first auxiliary gears and are respectively meshed with the two auxiliary gears.

The technical scheme of the present invention has the following advantages:

1. The automatic screw locking device provided by the present invention includes a motor, a transmission assembly, a cutter head assembly and a clutch mechanism, and the clutch mechanism is arranged on the transmission assembly and has a first working state in which a plurality of cutter head assemblies and the transmission assembly are linked and rotated. , and a second working state in which the cutter head assembly is separated from its corresponding transmission assembly when the cutter head assembly is in a locked state. In this way, in the process that the same motor drives multiple cutter head assemblies to lock the screws, if some cutter head assemblies finish locking the screws first and remain locked with the screws, due to the clutch mechanism, this part of the cutter head assemblies and the corresponding transmission assemblies are connected. Therefore, it will not affect the motor to drive the remaining cutter head assemblies to continue to tighten the screws. Compared with the prior art, multiple screws can be locked in place at one time. In addition, the transmission assembly and the motor can continue to operate, and the service life is long.

2. In the automatic screw locking device provided by the present invention, the transmission gear has a central hole for the rotating shaft to pass through, and at least one installation hole extending radially and communicating with the central hole, and the clutch mechanism is arranged in the installation hole. Since the clutch mechanism is installed in the installation hole on the transmission gear, it occupies less space and makes the transmission assembly more miniaturized.

3. In the automatic screw locking device provided by the present invention, the clutch mechanism includes: a transmission part, which is movably installed in the installation hole through an elastic part; A position, and a second position where the entire shaft extends into the mounting hole and separates the rotating shaft from the transmission gear; the elastic piece has one end abutted against the transmission piece, and the other end abuts against the blocking piece provided on the outer edge of the transmission gear, and the elastic piece is directed toward the transmission piece. A resilient force is applied to move it toward the first position. When in normal working state, the shaft and the transmission gear are linked through the transmission member; when the cutter head assembly is in a locked state, one of the shaft and the transmission gear will stop rotating, and the other side that can continue to rotate will drive the transmission member to squeeze The elastic member is pressed and the transmission member is driven to move to the second position, so as to realize the separation between the rotating shaft and the transmission gear. The above-mentioned clutch mechanism has the advantage of simple structure.

4. In the automatic screw locking device provided by the present invention, the cross section of the rotating shaft includes an arc line segment and a straight line segment connecting both ends of the arc line segment. When the head assembly is in the locked state, the arc segment of the rotating shaft will squeeze the transmission member to move it to the second position. The structure of the rotating shaft has the advantage of simple structure.

5. In the automatic screw locking device provided by the present invention, the blocking member is a bolt that is threadedly connected to the transmission gear. During installation, the transmission member and the elastic member can be installed into the installation holes in sequence, and then the bolts are tightened, so that the installation is fast and convenient ; In addition, by adjusting the depth of the bolt screwed into the mounting hole, the force of the elastic piece on the transmission piece can be adjusted, so that the adjustment is fast and convenient,

6. In the automatic screw locking device provided by the present invention, the transmission gear is provided with a plurality of installation holes evenly distributed along its circumferential direction, and the installation holes are provided with a clutch mechanism, which makes each part of the transmission gear more balanced and the rotation more stable and reliable. .

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Fig. 1 is the perspective view of the screw automatic locking device of the present invention;

Fig. 2 is the first perspective view of the automatic screw locking device in Fig. 1 after removing the motor and the cutter head assembly;

3 is a second perspective view of the automatic screw locking device in FIG. 1 after removing the motor and the cutter head assembly;

4 is a third perspective view of the automatic screw locking device in FIG. 1 after removing the motor and the cutter head assembly;

Fig. 5 is the top view of Fig. 2;

Figure 6 is a perspective view of part of the transmission assembly;

7 is a cross-sectional view of the second rotating shaft, the second transmission gear and the clutch mechanism;

Fig. 8 is the exploded structure schematic diagram of the second rotating shaft, the second transmission gear and the clutch mechanism;

FIG. 9 is a perspective view of an automatic screw locking and unlocking device in the prior art.

Reference numeral description: 01, hollow main gear; 02, hollow auxiliary gear; 03, bolt fixing sleeve;

1. Tool head assembly; 2. Motor; 21. Power output shaft; 22. Main gear; 3. Clutch mechanism; 31. Transmission part; 32. Elastic part; 33. Bolt; 4. First shaft; 5. First Transmission gear; 6, the second shaft; 61, arc segment; 62, straight segment; 7, the first auxiliary gear; 8, the second transmission gear; 81, the center hole; 82, the installation hole; 9, the second auxiliary gear ; 91, the third axis.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example

This embodiment provides an automatic screw locking device, as shown in FIGS. 1-5 , including a motor 2 , a transmission assembly, a cutter head assembly 1 and a clutch mechanism 3 .

As shown in Figs. 1 and 2, one end of the motor 2 is provided with a power output shaft 21, and two main gears 22 sleeved on the power output shaft 21 and rotating in conjunction with the power output shaft 21. The same motor 2 passes through multiple A transmission assembly is connected with a plurality of cutter head assemblies 1 .

As shown in Figures 2-5, the transmission assembly includes a first rotating shaft 4, a first transmission gear 5, a second rotating shaft 6, a second transmission gear 8 and a secondary gear set.

As shown in FIG. 6 , the first rotating shaft 4 is sleeved with a first transmission gear 5 arranged in linkage with the first rotating shaft 4 , and the first rotating shaft 4 is suitable for driving the cutter head assembly 1 to rotate.

The second rotating shaft 6 is sleeved with a first auxiliary gear 7, and a second transmission gear 8 meshed with the first transmission gear 5. The first auxiliary gear 7 is connected with the main gear 22 and is connected with all The second rotating shaft 6 rotates in linkage, and the clutch mechanism is provided between the second transmission gear 8 and the second rotating shaft 6 . As shown in FIG. 7 , the second transmission gear 8 has the second rotating shaft 6 to pass through and two mounting holes 82 extending in the radial direction and communicating with the central hole 81 , the two mounting holes 82 are respectively located on both sides of the central hole 81 in the axial direction. In this embodiment, the cross section of the second rotating shaft 6 includes an arc line segment 61 and a straight line segment 62 connecting both ends of the arc line segment 61. The straight line segment 62 can cooperate with the transmission member 31 so that the The shaft rotates in conjunction with the transmission gear

The auxiliary gear set includes a first auxiliary gear 7 connected with the main gear 22, and a second auxiliary gear 9 arranged between two adjacent first auxiliary gears 7 and meshingly connected with the two. The gear 9 is sleeved on the third rotating shaft 91 and rotates in conjunction therewith.

The clutch mechanism 3 is provided on the transmission assembly, and has a first working state in which a plurality of the cutter head assemblies 1 and the transmission assembly are rotated in linkage, and when the cutter head assemblies 1 are in a locked state, The second working state in which the cutter head assembly 1 is separated from the corresponding transmission assembly.

As shown in Figures 7 and 8, the clutch mechanism 3 includes: a transmission member 31, which is movably installed in the mounting hole 82 through the elastic member 32, and the transmission member 31 has a part extending into the central hole 81, so that the The first position where the rotating shaft rotates in conjunction with the transmission gear, and the second position where the entire shaft extends into the mounting hole 82 to separate the rotating shaft from the transmission gear; the elastic member 32 has one end connected to the transmission gear. The other end abuts against the blocking member provided on the outer edge of the transmission gear, and the elastic member 32 applies an elastic force to the transmission member 31 to move it toward the first position. In this embodiment, the blocking member is a bolt 33 threadedly connected to the transmission gear

As an alternative embodiment, the first rotating shaft 4 is sleeved with a first transmission gear 5, the first rotating shaft 4 is suitable for driving the cutter head assembly 1 to rotate, and the first transmission gear 5 is connected to the first transmission gear 5. The clutch mechanism is provided between the rotating shafts 4 ; the second rotating shaft 6 is sleeved with a first auxiliary gear 7 and a second transmission gear 8 that rotate in conjunction with the follower, and the first auxiliary gear 7 is connected with the main gear 22 . , the second transmission gear 8 is meshed with the first transmission gear 5 .

As an alternative embodiment, the number of the mounting holes 82 is one, two, three or more, and the plurality of mounting holes 82 are evenly distributed along the circumferential direction of the second transmission gear 8 .

The automatic screw locking device provided by the present invention includes a motor 2, a transmission assembly, a cutter head assembly 1 and a clutch mechanism 3. The clutch mechanism 3 is arranged on the transmission assembly, and has a first mechanism for interlocking rotation of the plurality of cutter head assemblies 1 and the transmission assembly. A working state, and a second working state in which the cutter head assembly 1 is separated from its corresponding transmission assembly when the cutter head assembly 1 is in a locked state. In this way, when the same motor 2 drives multiple cutter head assemblies 1 to lock the screws, if some cutter head assemblies 1 finish locking the screws first and remain locked with the screws, due to the clutch mechanism, this part of the cutter head assemblies 1 and the screws are locked. The corresponding transmission components are separated, so it will not affect the motor to drive the remaining cutter head components to continue to tighten the screws. Compared with the prior art, multiple screws can be locked in place at one time. In addition, since the transmission components and the motor can continue to operate, long lasting.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. An automatic screw locking device, comprising:

the cutter head components (1) are connected with the same motor (2) through a plurality of transmission components;

and the clutch mechanism (3) is arranged on the transmission assembly, and has a first working state that the cutter head assembly (1) and the transmission assembly are in linkage rotation, and a second working state that the cutter head assembly (1) corresponds to the transmission assembly and is separated when the cutter head assembly (1) is in a locking state.

2. The automatic screw locking device according to claim 1, wherein the transmission assembly comprises a rotating shaft and a transmission gear sleeved on the rotating shaft, the transmission gear has a central hole (81) for the rotating shaft to pass through, and at least one mounting hole (82) extending in the radial direction and communicating with the central hole (81), and the clutch mechanism (3) is arranged in the mounting hole (82).

3. Automatic screw locking device according to claim 2, characterized in that said clutch mechanism (3) comprises:

the transmission piece (31) is movably arranged in the mounting hole (82) through an elastic piece (32), and the transmission piece (31) is provided with a first position and a second position, wherein part of the first position extends into the central hole (81) to enable the rotating shaft and the transmission gear to rotate in a linkage mode, and the second position is completely extended into the mounting hole (82) to enable the rotating shaft and the transmission gear to be separated;

and one end of the elastic piece (32) is abutted against the transmission piece (31), the other end of the elastic piece is abutted against a blocking piece arranged on the outer edge of the transmission gear, and the elastic piece (32) applies elastic acting force for enabling the transmission piece (31) to move towards the first position direction.

4. The automatic screw locking device according to claim 3, characterized in that the cross section of the rotating shaft comprises an arc segment (61) and a straight segment (62) connecting two ends of the arc segment (61), wherein the straight segment (62) can be matched with the transmission member (31) to enable the rotating shaft and the transmission gear to rotate in a linkage manner.

5. The automatic screw locking device according to claim 3 or 4, characterized in that the blocking member is a bolt (33) threadedly coupled with the transmission gear.

6. The automatic screw locking device according to any one of claims 2 to 5, wherein the transmission gear is provided with a plurality of mounting holes (82) uniformly distributed along the circumferential direction of the transmission gear, and the clutch mechanism is arranged in the mounting holes (82).

7. The automatic screw locking device according to claim 6, wherein one end of the motor (2) is provided with a power output shaft (21), and a main gear (22) sleeved on the power output shaft (21) and rotating along with the power output shaft in a linkage manner, and the transmission assembly comprises a secondary gear set connected with the main gear (22).

8. The automatic screw locking device of claim 7, wherein said drive assembly further comprises:

the cutter head component comprises a first rotating shaft (4) and a second rotating shaft (4), wherein the first rotating shaft (4) is sleeved with a first transmission gear (5) which is in linkage with the first rotating shaft, and the first rotating shaft (4) is suitable for driving the cutter head component (1) to rotate;

second pivot (6), the cover is equipped with first pinion (7), and with second drive gear (8) that first drive gear (5) meshing is connected, first pinion (7) with master gear (22) link to each other, and with second pivot (6) linkage rotates, second drive gear (8) with be equipped with between second pivot (6) clutching mechanism.

9. The automatic screw locking device of claim 7, wherein said drive assembly further comprises:

the cutter head component (1) is sleeved with a first rotating shaft (4), the first rotating shaft (4) is suitable for driving the cutter head component (1) to rotate, and the clutch mechanism is arranged between the first rotating shaft (4) and the first rotating shaft (5);

and the second rotating shaft (6) is sleeved with a first pinion (7) and a second transmission gear (8) which are driven by the follower to rotate in a linkage manner, the first pinion (7) is connected with the main gear (22), and the second transmission gear (8) is meshed with the first transmission gear (5).

10. Automatic screw locking device according to claim 8 or 9, characterized in that said set of pinions comprises second pinions (9) disposed between two adjacent first pinions (7) and respectively in meshing engagement therewith.

Images