Connecting rod nut fastening wrench

Abstract

A connecting rod nut fastening wrench comprises a wrench part and a screwing part arranged at one end or two ends of the wrench part, the screwing part comprises a first C-shaped part and a second C-shaped part, the first C-shaped part is connected to the end of the wrench part, a plurality of tooth grooves are evenly distributed in the inner circumference of the first C-shaped part, a plurality of convex teeth are evenly distributed on the outer circumference of the second C-shaped part, and the tooth grooves are connected with the convex teeth. At least one bump is arranged on the inner circumference of the second C-shaped part; the second C-shaped part is used for being installed in the first C-shaped part, the protruding teeth are inserted into the tooth grooves, and the spanner is suitable for being used under the working condition that the operation space is narrow.

Description

Technical Field

[0001] The utility model relates to the technical field of wrench tools, in particular to a connecting rod nut fastening wrench. Background Art

[0002] Refer to Figure 5 , the three-phase connecting rod 40 of the GCB arc extinguishing chamber 30 is a power transmission component connecting the operating mechanism and the arc extinguishing chamber. The opening and closing operation time of the operating mechanism is only about 30 to 70 ms, and the operation function quantity is large. Therefore, the connection and fastening requirements for the nut 41 on the three-phase connecting rod 40 of the GCB arc extinguishing chamber 30 are high in precision and large in torque. Moreover, the nut 41 of the three-phase connecting rod 40 is in the form of a round nut, and four grooves for screwing are evenly distributed on the outer circumference of the nut. Since the space where the three-phase connecting rod 40 is located is narrow, the traditional wrench requires a space of 90° range for each screwing. If the operation space of the wrench is less than 90°, the nut cannot be screwed.

[0003] For example, Chinese patent document CN200970735Y discloses a special torque wrench for round nuts. Two convex blocks are arranged on the inner arm of the hook wrench, and these two convex blocks need to cooperate with the grooves on the round nut to be able to screw the round nut. In this process, the wrench needs to rotate 90° each time to make the convex blocks on the hook wrench hook the next groove on the round nut. Similarly, if the operation space of the wrench is less than 90°, the round nut cannot be tightened. Content of the Utility Model

[0004] The purpose of the utility model is to provide a connecting rod nut fastening wrench, which can facilitate the screwing operation of the nut on the three-phase connecting rod in a narrow space.

[0005] To achieve the above purpose, the utility model provides a connecting rod nut fastening wrench, which includes a wrench part and a screwing part arranged at one end or both ends of the wrench part. The characteristics are as follows: the screwing part includes a first C-shaped part and a second C-shaped part. The first C-shaped part is connected to the end of the wrench part. A plurality of tooth grooves (12) are evenly distributed on the inner circumference of the first C-shaped part. A plurality of convex teeth are evenly distributed on the outer circumference of the second C-shaped part, and at least one convex block is arranged on the inner circumference of the second C-shaped part; the second C-shaped part is used to be installed into the first C-shaped part, and the convex teeth are inserted into the tooth grooves.

[0006] The wrench part is a torque wrench.

[0007] A connecting part extending outwards is arranged in the middle of the outer circumference of the first C-shaped part. An installation hole is arranged at one end of the wrench part connected to the first C-shaped part, and the connecting part is inserted into the installation hole to connect the wrench part and the first C-shaped part.

[0008] A limiting hole is provided on the connecting part, a through hole corresponding to the limiting hole is provided on the wrench handle, and a fastening piece penetrates through the through hole on the wrench handle and the limiting hole on the connecting part.

[0009] A positioning step is further provided on the connecting part.

[0010] Three bumps are provided on the inner circumference of the second C-shaped part, and the three bumps are axisymmetric.

[0011] The utility model has the following technical effects compared with the prior art:

[0012] The second C-shaped part of the utility model is used to be installed on a nut, the bumps on the inner circumference of the second C-shaped part are used to be stuck into the grooves on the nut, the first C-shaped part is used to be installed outside the second C-shaped part, a plurality of convex teeth are adapted to a plurality of tooth grooves, and the wrench handle is used to rotate the first C-shaped part. In this way, when in use, since the first C-shaped part and the second C-shaped part are matched by the convex teeth and the tooth grooves, in a position with a narrow space, only by misaligning one or more teeth of the convex teeth and the tooth grooves, the nut can be screwed, so the wrench of the present application is more suitable for use in working conditions with a narrow operating space. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art:

[0014] Figure 1 It is a three-dimensional structure schematic diagram of the whole utility model;

[0015] Figure 2 It is a structure schematic diagram of the second C-shaped part and the first C-shaped part of the utility model separated;

[0016] Figure 3 It is a three-dimensional structure schematic diagram of the screwing part of the utility model;

[0017] Figure 4 It is a three-dimensional structure schematic diagram of the second C-shaped part of the utility model;

[0018] Figure 5 It is a state diagram when the utility model is in use.

[0019] Reference Signs:

[0020] Wrench handle 10, first C-shaped part 11, tooth groove 12, connecting part 13, limiting hole 14, positioning step 15;

[0021] Second C-shaped part 20, convex tooth 21, bump 22, axis 23;

[0022] GCB arc extinguishing chamber 30;

[0023] Three - phase connecting rod 40, nut 41. Detailed implementation mode

[0024] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0025] Please refer to Figures 1-4 , a connecting - rod nut tightening wrench, including a wrench part 10 and a screwing part arranged at one or both ends of the wrench part 10. The screwing part includes a first C - shaped part 11 and a second C - shaped part 20. The first C - shaped part 11 is connected to the end of the wrench part 10. A plurality of tooth grooves 12 are evenly distributed on the inner circumference of the first C - shaped part 11. A plurality of convex teeth 21 are evenly distributed on the outer circumference of the second C - shaped part 20. At least one convex block 22 is arranged on the inner circumference of the second C - shaped part 20. The second C - shaped part 20 is used to be installed into the first C - shaped part 11, and the convex teeth 21 are inserted into the tooth grooves 12. The second C - shaped part 20 is used to be installed on the nut 41. The convex block 22 on the inner circumference of the second C - shaped part 20 is used to be stuck into the groove on the nut 41. The first C - shaped part 11 is used to be installed outside the second C - shaped part 20. The plurality of convex teeth 21 are adapted to the plurality of tooth grooves 12. The wrench part 10 is used to rotate the first C - shaped part 11.

[0026] In this way, when in use, since the first C - shaped part 11 and the second C - shaped part 20 are matched by the convex teeth 21 and the tooth grooves 12, in a position with a narrow space, only by misaligning the convex teeth 21 and the tooth grooves 12 by one or more teeth, the nut 41 can be screwed. Therefore, the wrench of the present application is more suitable for working conditions with a narrow operating space.

[0027] Preferably, in order to facilitate applying torque to the nut 41 during installation, the wrench part 10 adopts a torque wrench. The torque wrench can be a pointer - type one or an electronic one.

[0028] Refer to Figure 3 , a connecting part 13 extending outward is arranged in the middle of the outer circumference of the first C - shaped part 11. An installation hole is arranged at one end of the wrench part 10 connected to the first C - shaped part 11. The connecting part 13 is inserted into the installation hole to connect the wrench part 10 and the first C - shaped part 11. When the sizes of the nuts 41 are different, it is convenient to replace the adapted screwing part.

[0029] Furthermore, a limiting hole 14 is arranged on the connecting part 13, and a through - hole corresponding to the limiting hole 14 is arranged on the wrench part 10. A fastener penetrates through the through - hole on the wrench part 10 and the limiting hole 14 on the connecting part 13. By installing the fastener, the screwing part and the wrench part 10 are prevented from falling off.

[0030] Further, a positioning step 15 is also provided on the connecting portion 13 to limit the screwing portion and the wrench portion 10, facilitating the alignment of the through hole on the wrench portion 10 and the limiting hole 14 on the connecting portion 13.

[0031] See Figure 4 , three bumps 22 are provided on the inner circumference of the second C-shaped portion 20, and the three bumps 22 are symmetric about the axis 23. When operating the nut 41, the three bumps 22 are all engaged in the three grooves on the nut 41. Compared with the prior art in which one bump is engaged in one groove on the nut, the stability is better, and the second C-shaped portion 20 is not easily separated from the nut 41 during the screwing operation.

[0032] The working principle or operation process of the present utility model is as follows:

[0033] See Figure 5 , in use, first put the second C-shaped portion 20 onto the connecting rod through the notch, and then move and fit the second C-shaped portion 20 onto the nut 41, and the three bumps 22 of the second C-shaped portion 20 are all engaged in the three grooves on the nut 41.

[0034] Connect the wrench portion 10 with the first C-shaped portion 11, put the first C-shaped portion 11 onto the connecting rod through the notch, and then move and fit the first C-shaped portion 11 onto the second C-shaped portion 20. Then, by operating the wrench portion 10, the nut 41 is screwed.

[0035] When the wrench portion 10 is interfered due to space limitation, hold the second C-shaped portion 20 with one hand, and horizontally move the wrench portion 10 and the first C-shaped portion 11 with the other hand to stagger the first C-shaped portion 11 from the second C-shaped portion 20, as shown in Figure 2 . Then, adjust the positions of the wrench portion 10 and the first C-shaped portion 11, fit the first C-shaped portion 11 onto the second C-shaped portion 20 again, and then perform the screwing operation.

Claims

1. A connecting rod nut tightening wrench, characterized in that: It includes a wrench part (10) and a screwing part arranged at one or both ends of the wrench part (10), and is characterized in that: the screwing part includes a first C-shaped part (11) and a second C-shaped part (20). The first C-shaped part (11) is connected to the end of the wrench part (10). A plurality of tooth grooves (12) are evenly distributed on the inner circumference of the first C-shaped part (11). A plurality of convex teeth (21) are evenly distributed on the outer circumference of the second C-shaped part (20). At least one convex block (22) is arranged on the inner circumference of the second C-shaped part (20); the second C-shaped part (20) is used to be installed inside the first C-shaped part (11), and the convex teeth (21) are inserted into the tooth grooves (12).

2. A connecting rod nut tightening wrench according to claim 1, characterized in that: The wrench part (10) is a torque wrench.

3. A connecting rod nut tightening wrench according to claim 1, characterized in that: A connecting part (13) extending outwards is arranged in the middle of the outer circumference of the first C-shaped part (11). An installation hole is arranged at one end of the wrench part (10) connected to the first C-shaped part (11). The connecting part (13) is inserted into the installation hole to connect the wrench part (10) and the first C-shaped part (11).

4. A connecting rod nut tightening wrench according to claim 3, characterized in that: A limit hole (14) is arranged on the connecting part (13), and a through hole corresponding to the limit hole (14) is arranged on the wrench part (10). A fastener penetrates through the through hole on the wrench part (10) and the limit hole (14) on the connecting part (13).

5. A connecting rod nut tightening wrench according to claim 3 or 4, characterized in that: A positioning step (15) is further arranged on the connecting part (13).

6. A connecting rod nut tightening wrench according to claim 1, characterized in that: Three convex blocks (22) are arranged on the inner circumference of the second C-shaped part (20), and the three convex blocks (22) are symmetrical about the axis (23).

Images