Wrench tool for locking winch shaft through spring force

Abstract

The utility model relates to the technical field of wrench tools, and provides a wrench tool for locking a winch shaft through spring force, which comprises a wrench rod and a fixing sleeve sleeved on the wrench rod, a driving head is arranged at one end of the wrench rod, an anti-rotating head is arranged in the middle of the wrench rod, and an elastic component is arranged on the side wall of the other end of the wrench rod. The fixing sleeve is connected with the rolling and pulling device through a fixing screw. A positioning cylinder is arranged at the other end of the fixing sleeve, and a positioning ring groove and an anti-rotation part are arranged on the inner wall of the positioning cylinder; an axial elastic piece used for providing axial force is arranged between the positioning cylinder and the wrench rod. When the elastic part is clamped into the positioning ring groove, the axial elastic part is compressed, the anti-rotation head is separated from the anti-rotation part, and the wrench rod can rotate (so that the winch shaft can be rotated); when the elastic part retreats from the positioning ring groove in the direction opposite to the compression direction of the axial elastic part, the axial elastic part extends, so that the anti-rotation head is matched with the anti-rotation part, the wrench rod is limited to rotate relative to the fixing sleeve, and then the winch shaft is locked.

Description

Technical Field

[0001] The utility model relates to the technical field of wrench tools, in particular to a wrench tool for locking a capstan shaft through spring force. Background Art

[0002] Winding devices typically utilize the rotation of a capstan shaft to retract and release a wire rope, achieving actions such as lifting and pulling. Examples of such devices include winches and capstans. Currently, some manual winders typically have a wrench hole at the end of the capstan shaft. To retract the wire rope, a wrench is inserted into the hole and rotated, which in turn rotates the capstan shaft.

[0003] However, in some working conditions, the wire rope is always loaded. When the wrench is released, the capstan shaft will immediately reverse, and the wire rope will immediately pull back under the action of the load, making it impossible to stop the capstan shaft at any angle (that is, at any position of the wire rope). Therefore, how to provide a wrench tool that can lock the capstan shaft is a technical problem that needs to be solved in this field. Utility Model Content

[0004] The purpose of the utility model is to provide a wrench tool for locking a capstan shaft by spring force, so as to solve the above-mentioned defects of the prior art.

[0005] The utility model is achieved through the following technical solutions:

[0006] A wrench tool that locks a capstan shaft by spring force is used in a winding and pulling device that rotates and unwinds a wire rope by rotating the capstan shaft. The end of the capstan shaft is provided with a connecting portion, including a wrench rod and a fixing sleeve sleeved on the wrench rod; one end of the wrench rod is provided with a driving head for connecting to the connecting portion and transmitting torque, the middle part of the wrench rod is provided with an anti-rotation head, and the other end side wall of the wrench rod is provided with an elastic component;

[0007] One end of the fixing sleeve is provided with at least two fixing screws, which are connected to the winding and pulling device when in use; the other end of the fixing sleeve is provided with a positioning cylinder, the inner wall of which is provided with a positioning ring groove that can cooperate with the elastic component, and an anti-rotation part that can cooperate with the anti-rotation head;

[0008] An axial elastic member for providing axial force is provided between the positioning cylinder and the wrench rod. When the elastic member is inserted into the positioning ring groove, the axial elastic member is compressed, and the anti-rotation head is separated from the anti-rotation part; when the elastic member exits the positioning ring groove in the opposite direction of the compression of the axial elastic member, the axial elastic member stretches, so that the anti-rotation head cooperates with the anti-rotation part, thereby limiting the rotation of the wrench rod relative to the fixed sleeve.

[0009] Optionally, one end of the wrench rod away from the drive head is detachably connected to a handle sleeve.

[0010] Optionally, the handle sleeve is sleeved on the wrench rod, and the two are radially connected by a first fastener.

[0011] Optionally, one end of the axial elastic member abuts against an end of the handle sleeve, and the other end abuts against an end of the anti-rotation portion.

[0012] Optionally, the elastic component is provided on a side wall of the handle sleeve.

[0013] Optionally, the wrench rod is provided with thrust bearings at both ends of the axial elastic member.

[0014] Optionally, the anti-rotation head is provided with a skirt, which can abut against the end of the anti-rotation portion to limit the anti-rotation head from separating from the anti-rotation portion when the axial elastic member is extended.

[0015] Optionally, the elastic component includes a radial elastic member and a steel ball, a mounting hole is provided in the radial direction of the wrench rod, and the radial elastic member and the steel ball are sequentially arranged in the mounting hole.

[0016] Optionally, the fixing sleeve is provided with a stepped hole for passing the fixing screw, and the small diameter section of the stepped hole is provided with an internal thread that can be connected to the fixing screw. When in use, the fixing screw passes through the small diameter section and the large diameter section of the stepped hole in sequence and then is connected to the winding device.

[0017] The technical solution of this utility model has at least the following advantages and beneficial effects: in the utility model, the fixing sleeve is provided with at least two fixing screws, which are connected and fixed to the winding and pulling device when in use, so that the fixing sleeve and the winding and pulling device are relatively fixed; when the capstan shaft needs to be rotated, the wrench rod is pushed to make the elastic component fit into the positioning ring groove. At this time, the axial elastic component is compressed, the anti-rotation head is separated from the anti-rotation part, and the wrench rod can be rotated (thereby rotating the capstan shaft); when the capstan shaft needs to be locked, the wrench rod is pulled to make the elastic component withdraw from the positioning ring groove. At this time, the axial elastic component is extended, and under the action of the elastic force, the wrench rod continues to move axially, so that the anti-rotation head cooperates with the anti-rotation part, thereby limiting the rotation of the wrench rod relative to the fixing sleeve, thereby achieving locking of the capstan shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of a wrench tool for locking a capstan shaft through spring force provided by the present invention;

[0020] Figure 2 A top view of a wrench tool for locking a capstan shaft through spring force provided by the present invention;

[0021] Figure 3 for Figure 2 AA sectional view (wrench lever unlocked state);

[0022] Figure 4 for Figure 2 Enlarged view of point B;

[0023] Figure 5 for Figure 2 AA sectional view (wrench rod locked state);

[0024] Figure 6 Schematic diagram of the connection structure between the fixing sleeve and the positioning cylinder;

[0025] Figure 7 for Figure 6 CC cross-section diagram;

[0026] Figure 8 Schematic diagram of the connection structure of the wrench rod, anti-rotation head, handle sleeve and elastic member;

[0027] Figure 9 This is a schematic diagram of the anti-rotation structure;

[0028] Figure 10 It is a structural schematic diagram of a winding and pulling device in the prior art;

[0029] Icon: 1-wrench rod, 101-drive head, 2-fixing sleeve, 201-fixing screw, 202-step hole, 3-anti-rotation head, 301-skirt stop, 4-elastic component, 401-spring, 402-steel ball, 5-positioning cylinder, 501-anti-rotation part, 502-positioning ring groove, 6-axial elastic part, 7-thrust bearing, 8-handle sleeve, 9-first fastener, 10-second fastener, 11-winding device, 1101-wire rope, 1102-winch shaft, 1103-connecting part. DETAILED DESCRIPTION

[0030] refer to Figure 1 A wrench tool for locking the capstan shaft by spring force is used for a winding device 11 for rotating and unwinding a wire rope 1101 through a capstan shaft 1102. The end of the capstan shaft 1102 is provided with a connecting portion 1103 (reference Figure 7 ),refer to Figure 1 The wrench tool includes a wrench rod 1 and a fixing sleeve 2 sleeved on the wrench rod 1.

[0031] refer to Figure 3 and Figure 4Two fixing screws 201 are provided at one end of the fixing sleeve 2. When in use, the two fixing screws 201 are connected to the winding and pulling device 11 to achieve relative fixation of the fixing sleeve 2 and the winding and pulling device 11. It is easy to understand that at least two screws are required to define the relative position of the fixing sleeve 2 and the winding and pulling device 11. Therefore, in other embodiments, the number of fixing screws 201 can naturally be greater than two.

[0032] Furthermore, the fixing sleeve 2 of this embodiment is provided with a stepped hole 202 for passing the fixing screw 201, and the small diameter section of the stepped hole 202 is provided with an internal thread that can be connected to the fixing screw 201. When in use, the fixing screw 201 passes through the small diameter section and the large diameter section of the stepped hole 202 in sequence and is connected to the winding and pulling device 11. It is worth noting that such a setting ensures that even after the fixing screw 201 is separated from the winding and pulling device 11, it will not fall off the fixing sleeve 2, and even if the fixing screw 201 always remains hanging on the fixing sleeve 2, it is more convenient to use.

[0033] refer to Figure 8 One end of the wrench rod 1 is provided with a drive head 101, which is used to connect to the connecting portion 1103 at the end of the capstan shaft 1102 and transmit torque. For example, if the connecting portion 1103 at the end of the capstan shaft 1102 in this embodiment is a hexagonal hole, the drive head 101 is a hexagonal head that matches the hexagonal hole. Similarly, in other embodiments, the drive head 101 can be adapted to the shape of the connecting portion 1103.

[0034] refer to Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 8 The middle portion of the wrench rod 1 is provided with an anti-rotation head 3. As an option, in this embodiment, the anti-rotation head 3 is radially connected to the wrench rod 1 via a second fastener 10 (e.g., a screw, rivet, etc.), that is, the anti-rotation head 3 and the wrench rod 1 are separate. In some embodiments, the anti-rotation head 3 can of course be integrally formed with the wrench rod 1, or fixedly connected by other means (e.g., welding).

[0035] An elastic component 4 is provided on the side wall of the other end of the wrench rod 1, and a positioning cylinder 5 is provided on the other end of the fixing sleeve 2. The inner wall of the positioning cylinder 5 is provided with a positioning ring groove 502 that can cooperate with the elastic component 4, and an anti-rotation part 501 that can cooperate with the anti-rotation head 3; an axial elastic component 6 for providing axial force is provided between the positioning cylinder 5 and the wrench rod 1. When the elastic component 4 is inserted into the positioning ring groove 502, the axial elastic component 6 is compressed, and the anti-rotation head 3 is separated from the anti-rotation part 501; when the elastic component 4 exits the positioning ring groove 502 in the opposite direction of the compression of the axial elastic component 6, the axial elastic component 6 extends, so that the anti-rotation head 3 cooperates with the anti-rotation part 501, thereby limiting the rotation of the wrench rod 1 relative to the fixing sleeve 2.

[0036] For the convenience of description, the end of the anti-rotation part 501 close to the fixed sleeve 2 is defined as the first side, and the end of the anti-rotation part 501 away from the fixed sleeve 2 is defined as the second side. Based on the above, in actual applications, the anti-rotation head 3 is located on the first side of the anti-rotation part 501, the positioning ring groove 502 is located on the second side of the anti-rotation part 501, and the axial elastic part 6 is arranged between the anti-rotation part 501 and the positioning ring groove 502.

[0037] When it is necessary to rotate the capstan shaft 1102, the wrench rod 1 is pushed so that the elastic component 4 is stuck in the positioning ring groove 502. At this time, the axial elastic component 6 is compressed, the anti-rotation head 3 is separated from the anti-rotation portion 501, and the wrench rod 1 can be rotated (thus rotating the capstan shaft 1102); when it is necessary to lock the capstan shaft 1102, the wrench rod 1 is pulled so that the elastic component 4 exits the positioning ring groove 502. At this time, the axial elastic component 6 is extended and, under the action of the elastic force, the wrench rod 1 continues to move axially, so that the anti-rotation head 3 cooperates with the anti-rotation portion 501, thereby limiting the rotation of the wrench rod 1 relative to the fixed sleeve 2, thereby achieving the locking of the capstan shaft 1102. In addition, it should be understood that the length of the drive head 101 should be sufficient to avoid separation from the connecting portion 1103 of the capstan shaft 1102 during the process of pushing and pulling the wrench rod 1.

[0038] As an option, the anti-rotation portion 501 of this embodiment is a regular decagonal hole (refer to Figure 7 ), the cross-section of the anti-rotation head 3 perpendicular to the axis also forms a regular decagon. Of course, in some embodiments, the anti-rotation portion 501 may also be a hole with other polygonal structures. In other embodiments, the anti-rotation portion 501 and the anti-rotation head 3 may also have other structures, as long as they can cooperate to prevent rotation. For example, the anti-rotation portion 501 may be an internal gear and the anti-rotation head 3 may be an external gear; or the anti-rotation portion 501 may be a splined hole and the anti-rotation head 3 may be a splined hole.

[0039] In this embodiment, the axial elastic member 6 is a spring 401. Alternatively, the elastic member 4 includes a radial elastic member and a steel ball 402. A mounting hole is provided radially along the wrench rod 1, and the radial elastic member and the steel ball 402 are sequentially positioned within the mounting hole. It should be understood that in other embodiments, the elastic member 4 may also have other structures, such as a plunger with the spring 401.

[0040] In this embodiment, the anti-rotation head 3 is provided with a skirt 301 (refer to Figure 9 ), the skirt stop 301 can abut against the end of the anti-rotation part 501 to limit the anti-rotation head 3 from separating from the anti-rotation part 501 when the axial elastic member 6 is extended, that is, to limit the axial displacement distance of the wrench rod 1. In actual application, the length of the positioning tube 5 should be sufficient, and the limiting effect of the skirt stop 301 can be used to limit the steel ball 402 from sliding out of the positioning tube 5.

[0041] As an option, the end of the wrench rod 1 in this embodiment away from the drive head 101 is detachably connected to the handle sleeve 8. On this basis, the elastic component 4 is arranged on the side wall of the wrench sleeve, and one end of the axial elastic component 6 is abutted against the end of the anti-rotation part 501, and the other end of the axial elastic component 6 is abutted against the end of the wrench sleeve.

[0042] Furthermore, the handle sleeve 8 is sleeved onto the wrench rod 1, and the two are radially connected by a first fastener 9 (e.g., a screw, rivet, etc.). In this embodiment, two first fasteners 9 are provided along the axial direction to ensure a reliable connection. Of course, in other embodiments, one first fastener 9 may be provided, or the number of first fasteners 9 may be greater than two. Of course, in other embodiments, the handle sleeve 8 may also be detachably connected to the wrench rod 1 using other methods.

[0043] Since the axial force provided by the axial elastic member 6 may affect the smoothness of the rotation of the wrench rod 1, the present embodiment has made the following improvements. Figure 3 and Figure 8 The wrench rod 1 is provided with thrust bearings 7 at both ends of the axial elastic member 6. In this way, even if the elastic member applies an axial force, the rotation of the wrench rod 1 can be easily achieved by the rolling of the thrust bearings 7. In addition, it should be understood that the thrust bearings 7 can freely move axially on the wrench rod 1.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A wrench tool that locks a capstan shaft by spring force, used in a winding device that winds and unwinds a wire rope by rotating the capstan shaft. The end of the capstan shaft is provided with a connecting portion, characterized in that: The invention comprises a wrench rod and a fixing sleeve sleeved on the wrench rod; a driving head for connecting to the connecting portion and transmitting torque is provided at one end of the wrench rod, an anti-rotation head is provided at the middle of the wrench rod, and an elastic component is provided on the side wall of the other end of the wrench rod; One end of the fixing sleeve is provided with at least two fixing screws, which are connected to the winding and pulling device when in use; the other end of the fixing sleeve is provided with a positioning cylinder, the inner wall of which is provided with a positioning ring groove that can cooperate with the elastic component, and an anti-rotation part that can cooperate with the anti-rotation head; An axial elastic member for providing axial force is provided between the positioning cylinder and the wrench rod. When the elastic member is inserted into the positioning ring groove, the axial elastic member is compressed, and the anti-rotation head is separated from the anti-rotation part; when the elastic member exits the positioning ring groove in the opposite direction of the compression of the axial elastic member, the axial elastic member stretches, so that the anti-rotation head cooperates with the anti-rotation part, thereby limiting the rotation of the wrench rod relative to the fixed sleeve.

2. The wrench tool for locking the capstan shaft by spring force according to claim 1, characterized in that: One end of the wrench rod away from the driving head is detachably connected to a handle sleeve.

3. The wrench tool for locking the capstan shaft by spring force according to claim 2, characterized in that: The handle sleeve is sleeved on the wrench rod, and the two are radially connected by a first fastener.

4. The wrench tool for locking the capstan shaft by spring force according to claim 2, characterized in that: One end of the axial elastic member abuts against the end of the handle sleeve, and the other end abuts against the end of the anti-rotation portion.

5. The wrench tool for locking the capstan shaft by spring force according to claim 2, characterized in that: The elastic component is arranged on the side wall of the handle sleeve.

6. The wrench tool for locking a capstan shaft by spring force according to any one of claims 1 to 5, characterized in that: The wrench rod is sleeved with thrust bearings at both ends of the axial elastic member.

7. The wrench tool for locking a capstan shaft by spring force according to any one of claims 1 to 5, characterized in that: The anti-rotation head is provided with a skirt stopper, which can abut against the end of the anti-rotation portion to limit the anti-rotation head from separating from the anti-rotation portion when the axial elastic member is extended.

8. The wrench tool for locking a capstan shaft by spring force according to any one of claims 1 to 5, characterized in that: The elastic component includes a radial elastic component and a steel ball. A mounting hole is provided in the radial direction of the wrench rod. The radial elastic component and the steel ball are sequentially arranged in the mounting hole.

9. The wrench tool for locking a capstan shaft by spring force according to any one of claims 1 to 5, characterized in that: The fixing sleeve is provided with a stepped hole for passing the fixing screw, and the small diameter section of the stepped hole is provided with an internal thread that can be connected to the fixing screw. When in use, the fixing screw passes through the small diameter section and the large diameter section of the stepped hole in sequence and is connected to the winding device.

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