Small-spanner-distance double offset ring spanner with adjustable force arm

Abstract

The utility model discloses a small-spanner-distance double offset ring spanner capable of adjusting a force arm, which comprises a mounting seat, a rotating column is rotatably connected in the mounting seat, a quincunx through hole is formed in the rotating column, a handle is fixedly connected at the bottom end of the mounting seat, an adjusting rod is slidably connected in the handle, and the small-spanner-distance double offset ring spanner further comprises a quick adjusting mechanism. The rapid adjusting mechanism comprises a T-shaped groove, rectangular frames, fixing blocks and fixing grooves, the T-shaped groove is formed in the adjusting rod, the rectangular frames are fixedly connected to the front inner wall and the rear inner wall of a longitudinal groove of the T-shaped groove respectively, the fixing blocks are slidably connected to the interiors of the rectangular frames respectively, and the fixing grooves are formed in the front inner wall and the rear inner wall of the handle respectively. According to the small-wrench-distance double offset ring spanner with the adjustable force arm, the length of the force arm can be conveniently adjusted according to the fastening degree of a nut and specific working requirements, the applied torque can be accurately changed, and meanwhile rapid and continuous one-way rotation of the double offset ring spanner is achieved.

Description

Technical Field

[0001] This utility model relates to the field of box wrench adjustment technology, specifically a small-pitch box wrench with adjustable lever arm. Background Technology

[0002] Power towers are tall structures used to support high-voltage transmission lines, mostly composed of materials such as angle steel and steel pipes. Their function is to erect high-voltage power lines at a certain height, preventing the lines from contacting the ground, reducing the impact of electromagnetic radiation on ground organisms, ensuring the safe and stable operation of the transmission lines, and enabling long-distance, high-capacity power transmission. The installation of power towers typically involves using cranes and other equipment to lift the various components to the designated location for assembly. Bolts are then tightened using wrenches to secure the components, gradually completing the tower's construction. Finally, the transmission lines are erected and connected.

[0003] While existing box wrenches can provide good torque transmission and bolt gripping force during power tower assembly, they require the wrench to be fully placed over the bolt head. In narrow spaces or where there are obstacles around the bolt head, the wrench distance is often less than 30 degrees. This requires operators to repeatedly remove the box wrench, adjust the angle, and then place it over the nut for tightening. When tightening nuts with different tightness, it is necessary to change to box wrenches with different lever arm lengths to change the torque and tighten the nuts more effortlessly.

[0004] Existing box wrenches require repeated removal and re-attaching to change the rotation angle when tightening or loosening nuts, resulting in low operating efficiency and limited applicability as the torque cannot be flexibly adjusted according to actual needs. Therefore, we propose a small-pitch box wrench with adjustable lever arm. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a small-pitch box wrench with adjustable lever arm. It can conveniently adjust the lever arm length according to the tightness of the nut and specific work requirements, accurately change the applied torque, and realize the rapid and continuous unidirectional rotation of the box wrench, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable lever arm small-pitch box wrench, including a mounting base, a rotating column rotatably connected inside the mounting base, a box-shaped through hole inside the rotating column, a handle fixedly connected to the bottom end of the mounting base, an adjusting rod slidably connected inside the handle, and a quick adjustment mechanism;

[0007] Quick adjustment mechanism: It includes a T-slot, a rectangular frame, a fixing block, and a fixing groove. The adjusting rod has a T-slot inside. The rectangular frame is fixedly connected to the front and rear inner walls of the longitudinal groove of the T-slot. The fixing block is slidably connected to the inside of the rectangular frame. The front and rear inner walls of the handle have fixing grooves. The fixing block is installed in conjunction with the adjacent fixing groove on the same side. It can conveniently adjust the lever arm length and accurately change the applied torque according to the tightness of the nut and specific working requirements. At the same time, it realizes the rapid and continuous unidirectional rotation of the box wrench.

[0008] Furthermore, the quick adjustment mechanism also includes a baffle and a spring. The baffle is fixedly sleeved on the outside of the fixed block, and the outside of the baffle is slidably connected to the inner wall of the rectangular frame on the same side. The spring is movably sleeved on the outside of the fixed block, and the spring is located between the side of the baffle near the center of the handle and the inner wall of the rectangular frame near the center of the handle, so as to realize the rebound of the fixed block.

[0009] Furthermore, the quick adjustment mechanism also includes a pull rod, a connecting rod, and a pull block. The pull rod is slidably connected inside the T-slot, and the top of the pull rod is rotatably connected to a connecting rod. The top of the connecting rod is rotatably connected to the end of the fixed block on the same side near the center of the handle. The bottom of the pull rod is fixedly connected to a pull block, and the pull block has an anti-slip groove on its outside for easy operation.

[0010] Furthermore, a ratchet is fixedly sleeved on the outside of the rotating column, and a rotating shaft is rotatably connected between the upper and lower inner walls of the mounting base. A rotating block is fixedly sleeved on the outside of the rotating shaft, and ratchet teeth are respectively provided at the top of the rotating block. The ratchet and ratchet teeth are installed in cooperation to realize unidirectional transmission.

[0011] Furthermore, the outer bottom end of the rotating block is provided with grooves, and the top of the handle is provided with a telescopic rod. The telescopic end of the telescopic rod is fixedly connected to a ball, which is installed in conjunction with the groove to control the engagement and disengagement of the ratchet and the ratchet wheel.

[0012] Furthermore, a second spring is movably sleeved on the outside of the telescopic rod. The second spring is located between the upper surface of the handle and the outer bottom end of the ball, ensuring that the ball is tightly pressed against the inner wall of the groove.

[0013] Furthermore, the front end of the rotating shaft is provided with an adjustment plate, and the front side of the mounting base is provided with a fan-shaped groove corresponding to the adjustment plate, which facilitates switching the rotation direction.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This adjustable lever arm small-pitch box wrench has the following advantages:

[0015] 1. The telescopic rod drives the ball to extend into the corresponding groove. The second spring presses the ball, causing the ratchet on one side of the rotating block to engage with the ratchet wheel. When rotating towards the engaged ratchet side, the ratchet is pushed open and the second spring retracts to avoid it. However, when rotating in the opposite direction, the ratchet wheel will be stuck by the ratchet and cannot rotate. This allows the wrench to rotate continuously in one direction, either clockwise or counterclockwise. When tightening or loosening nuts, you only need to swing the wrench back and forth. Unlike traditional wrenches, you do not need to readjust the position after each rotation, which greatly improves work efficiency.

[0016] 2. By pulling the connecting rod downwards, the fixed block connected to the top rotates and slides centripetally inside the corresponding rectangular frame. The fixed block will drive the baffle to slide centripetally inside the rectangular frame. The fixed block is pulled out from the fixed slot. Pull the adjusting rod to adjust to the desired position. Release the pull block. When the spring returns, it will push the baffle to slide the fixed block to the centrifugal side. The fixed block is inserted into the corresponding fixed slot, realizing the quick adjustment of the lever arm of the box wrench. It can conveniently adjust the lever arm length according to the tightness of the nut and specific work requirements, accurately change the applied torque, and adapt to the torque requirements of different nuts, thereby achieving fast and continuous operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention in cross-section from the top.

[0019] Figure 3 This is a schematic diagram of the structure of the present invention from a front sectional view;

[0020] Figure 4 This is an enlarged structural diagram of point A of this utility model.

[0021] In the diagram: 1 Mounting base, 2 Rotary column, 3 Plum blossom-shaped through hole, 4 Handle, 5 Adjusting rod, 6 Quick adjustment mechanism, 61 T-slot, 62 Rectangular frame, 63 Fixing block, 64 Fixing groove, 65 Baffle, 66 Spring 1, 67 Pull rod, 68 Connecting rod, 69 Pull block, 7 Ratchet, 8 Rotating shaft, 9 Rotating block, 10 Ratchet, 11 Groove, 12 Telescopic rod, 13 Ball, 14 Spring 2, 15 Adjusting plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This embodiment provides a technical solution: an adjustable lever arm small-pitch box wrench, including a mounting base 1, a rotating column 2 rotatably connected inside the mounting base 1, a box-shaped through hole 3 inside the rotating column 2 (the rotating column 2 and the box-shaped through hole 3 form a box-shaped sleeve structure), a handle 4 fixedly connected to the bottom end of the mounting base 1, an adjusting rod 5 slidably connected inside the handle 4, and a quick adjustment mechanism 6, a ratchet 7 fixedly fitted outside the rotating column 2, a rotating shaft 8 rotatably connected between the upper and lower inner walls of the mounting base 1, a rotating block 9 fixedly fitted outside the rotating shaft 8, ratchet teeth 10 respectively provided at the top of the rotating block 9, the ratchet 7 and ratchet teeth 10 being installed together, grooves 11 respectively provided at the bottom of the rotating block 9, a telescopic rod 12 provided at the top of the handle 4, a ball 13 fixedly connected to the telescopic end of the telescopic rod 12, the ball 13 being installed together with the groove 11, and a spring 2 movably fitted outside the telescopic rod 12. 14. Spring 14 is located between the upper surface of handle 4 and the outer bottom of ball 13. Adjustment plate 15 is provided at the front end of rotating shaft 8. Fan-shaped groove corresponding to adjustment plate 15 is opened on the front side of mounting base 1. When the nut needs to be tightened or loosened during the assembly of the power tower, firstly, adjust plate 15 is rotated according to the tightening or loosening of the nut, so that telescopic rod 12 drives ball 13 to extend into the interior of corresponding groove 11. Then, through the pressing of spring 14, the outer side of ball 13 is pressed against the inner wall of groove 11, so that ratchet 10 on one side of rotating block 9 is engaged with ratchet 7. Then, plum blossom-shaped through hole 3 is put on the outside of the nut to be adjusted. When rotating towards the engaged ratchet 10 side, ratchet 10 is pushed open and spring 14 retracts to avoid it. However, when rotating in the opposite direction, ratchet 7 will be stuck by ratchet 10 and cannot rotate, thus realizing the tightening or loosening of the nut in a space with a plate distance of less than 30 degrees.

[0024] The quick adjustment mechanism 6 includes a T-slot 61, a rectangular frame 62, a fixing block 63, and a fixing groove 64. The adjusting rod 5 has a T-slot 61 inside. Rectangular frames 62 are fixedly connected to the front and rear inner walls of the longitudinal groove of the T-slot 61. Fixing blocks 63 are slidably connected inside the rectangular frames 62. Fixing grooves 64 are provided on the front and rear inner walls of the handle 4. The fixing blocks 63 are fitted with adjacent fixing grooves 64 on the same side. The quick adjustment mechanism 6 also includes a baffle 65 and a spring 66. Baffles 65 are fixedly fitted onto the outside of the fixing blocks 63. The outside of each baffle 65 is slidably connected to the inner wall of the rectangular frame 62 on the same side. Springs 66 are movably fitted onto the outside of each fixing block 63. Springs 66 are located between the side of the baffle 65 closest to the center of the handle 4 and the inner wall of the rectangular frame 62 closest to the center of the handle 4. The quick adjustment mechanism 6 also includes a pull rod 67, a connecting rod 68, and a pull block 69. The pull rod 67 is slidably connected inside the T-slot 61. The top of the pull rod 67... Each link 68 is rotatably connected to a fixed block 63 on the same side, near the center of the handle 4. A pull block 69 is fixedly connected to the bottom of the pull rod 67. The pull block 69 has an anti-slip groove on its outside. When tightening bolts or nuts with different tightness, different torques are required, and a longer handle box wrench is needed. Pulling the pull block 69 causes the pull rod 67 to pull the link 68 downward, causing the fixed block 63, which is rotatably connected at its top, to slide centripetally inside the corresponding rectangular frame 62. The fixed block 63 will drive the baffle 65 to slide centripetally inside the rectangular frame 62, causing the spring 66 to contract. This will then pull the fixed block 63 out of the fixed groove 64. After that, pull the adjusting rod 5 to adjust to the desired position, and then release the pull block 69. The spring 66 will rebound, pushing the baffle 65 to slide the fixed block 63 to the centrifugal side until the fixed block 63 is inserted into the corresponding fixed groove 64, thereby adjusting the lever arm of the box wrench.

[0025] The working principle of the adjustable lever arm small-pitch box wrench provided by this utility model is as follows: During the assembly of the power tower, when it is necessary to tighten or loosen the nut, firstly, rotate the adjusting plate 15 according to the tightening or loosening of the nut, so that the telescopic rod 12 drives the ball 13 to extend into the corresponding groove 11. Then, through the pressing of the second spring 14, the outside of the ball 13 is pressed against the inner wall of the groove 11, so that the ratchet 10 on one side of the rotating block 9 engages with the ratchet 7. Then, the box-shaped through hole 3 is placed on the outside of the nut to be adjusted. When rotating towards the engaged ratchet 10, the ratchet 10 is pushed open and the second spring 14 retracts to avoid it. However, when rotating in the opposite direction, the ratchet 7 will be stuck by the ratchet 10 and cannot rotate. Thus, the nut can be tightened in a space with a plate distance of less than 30 degrees. To adjust the torque required when tightening bolts or nuts of varying tightness, a longer handle box wrench is needed. Pulling the pull block 69 causes the pull rod 67 to pull the connecting rod 68 downwards. This causes the connecting rod 68 to pull the fixed block 63, which is rotatably connected at the top, to slide centripetally inside the corresponding rectangular frame 62. The fixed block 63 then drives the baffle 65 to slide centripetally inside the rectangular frame 62, causing the spring 66 to contract. This pulls the fixed block 63 out of the fixing slot 64. The adjusting rod 5 is then pulled to the desired position. Releasing the pull block 69 causes the spring 66 to rebound, pushing the baffle 65 and causing the fixed block 63 to slide centrifugally until it inserts into the corresponding fixing slot 64, thus adjusting the lever arm of the box wrench.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A small-pitch box wrench with adjustable lever arm, comprising a mounting base (1), wherein a rotating post (2) is rotatably connected inside the mounting base (1), and a box-shaped through hole (3) is provided inside the rotating post (2), and a handle (4) is fixedly connected to the bottom end of the mounting base (1), wherein an adjusting rod (5) is slidably connected inside the handle (4), characterized in that: It also includes a quick adjustment mechanism (6); Quick adjustment mechanism (6): It includes a T-slot (61), a rectangular frame (62), a fixing block (63) and a fixing groove (64). The adjustment rod (5) has a T-slot (61) inside. The rectangular frame (62) is fixedly connected to the front and rear inner walls of the longitudinal groove of the T-slot (61). The fixing block (63) is slidably connected to the inside of the rectangular frame (62). The front and rear inner walls of the handle (4) have fixing grooves (64) in place. The fixing block (63) is installed in conjunction with the adjacent fixing groove (64) on the same side.

2. The adjustable lever arm small-pitch box wrench according to claim 1, characterized in that: The quick adjustment mechanism (6) also includes a baffle (65) and a spring (66). The baffle (65) is fixedly sleeved on the outside of the fixed block (63). The outside of the baffle (65) is slidably connected to the inner wall of the rectangular frame (62) on the same side. The spring (66) is movably sleeved on the outside of the fixed block (63). The spring (66) is located between the side of the baffle (65) near the center of the handle (4) and the inner wall of the rectangular frame (62) near the center of the handle (4).

3. The adjustable lever arm small-pitch box wrench according to claim 1, characterized in that: The quick adjustment mechanism (6) also includes a pull rod (67), a connecting rod (68), and a pull block (69). The pull rod (67) is slidably connected inside the T-slot (61). The top of the pull rod (67) is rotatably connected to the connecting rod (68). The top of the connecting rod (68) is rotatably connected to the end of the fixed block (63) on the same side near the center of the handle (4). The bottom of the pull rod (67) is fixedly connected to the pull block (69). The pull block (69) has an anti-slip groove on its outside.

4. The adjustable lever arm small-pitch box wrench according to claim 1, characterized in that: The rotating column (2) is fixedly fitted with a ratchet (7), and the upper and lower inner walls of the mounting base (1) are rotatably connected with a rotating shaft (8). The rotating shaft (8) is fixedly fitted with a rotating block (9), and the top of the rotating block (9) is respectively provided with a ratchet (10). The ratchet (7) and the ratchet (10) are installed together.

5. The adjustable lever arm small-pitch box wrench according to claim 4, characterized in that: The outer bottom of the rotating block (9) is provided with grooves (11), and the top of the handle (4) is provided with a telescopic rod (12). The telescopic end of the telescopic rod (12) is fixedly connected to a ball (13), and the ball (13) is installed in conjunction with the groove (11).

6. The adjustable lever arm small-pitch box wrench according to claim 5, characterized in that: The telescopic rod (12) is movably fitted with a second spring (14), which is located between the upper surface of the handle (4) and the outer bottom end of the ball (13).

7. The adjustable lever arm small-pitch box wrench according to claim 4, characterized in that: The front end of the rotating shaft (8) is provided with an adjustment plate (15), and the front side of the mounting base (1) is provided with a fan-shaped groove corresponding to the adjustment plate (15).

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