Telescopic wrench with adjustable length

Abstract

The utility model provides a length-adjustable telescopic wrench, which belongs to the technical field of wrenches and comprises a wrench telescopic cylinder, one end of the wrench telescopic cylinder is fixedly connected with a rubber grip, an extension rod is movably connected in the wrench telescopic cylinder, one end of the extension rod is in threaded connection with a ratchet wrench head, and the top end of the wrench telescopic cylinder is in threaded connection with an operation cylinder. An operation frame is embedded in the top of one side of the operation cylinder, a movable seat is slidably connected into the operation frame, a hoop is fixedly connected to one side of the movable seat, four-claw clamping blocks are fixedly connected to the four corners of the inner wall of the operation cylinder, the tops of the four-claw clamping blocks are sleeved with the hoop, a drag hook is hinged to the middle of the movable seat, a retaining ring is hinged to the bottom of the inner wall of the operation frame, and a groove is formed in the middle of the drag hook. According to the telescopic wrench with the adjustable length, the replaceable wrench head is pulled out of the mounting hole to be replaced and remounted by disassembling the anti-falling screw rod between the first assembling hole and the second assembling hole, and the wrench can be repeatedly used.

Description

Technical Field

[0001] This utility model belongs to the field of wrench technology, specifically relating to an adjustable-length telescopic wrench. Background Technology

[0002] Existing telescopic wrenches, after adjusting the extension length, are prone to accidental activation of the operation button, causing the wrench size to change and requiring readjustment, which is very inconvenient during use. The "Adjustable Length Telescopic Wrench" disclosed in application number "CN202220918445.8" is an increasingly mature technology. It features an anti-slip sleeve on the right side of the handle surface and a limit mechanism inside the wrench head. The limit mechanism includes a groove inside the wrench head, with a movable rod slidably connected to the inner surface of the groove. After adjusting the wrench size, pressing and pushing the button causes the limit rod to enter the groove of the limit wheel, thus restricting the rotation of the main rotating rod and avoiding the problem of accidental activation of the adjustment part causing a change in wrench size requiring repeated adjustment. However, this device still has the following drawbacks: the internal parts are too complex during use, and repairs are difficult when parts break or are damaged. During prolonged use, the bolt heads are prone to wear due to twisting bolts and other objects, affecting the wrench's clamping tightness, but replacement is inconvenient, shortening the wrench's service life. Utility Model Content

[0003] The purpose of this utility model is to provide an adjustable-length telescopic wrench, which aims to solve the problems in the prior art where parts are difficult to repair after breakage, bolt heads are easily worn due to prolonged twisting of bolts and other items during use, affecting the wrench's clamping tightness, and making replacement inconvenient and shortening the wrench's service life.

[0004] To achieve the above objectives, this utility model provides the following technical solution: It includes a telescopic wrench cylinder, one end of which is fixedly connected to a rubber handle; an extension rod is movably connected inside the telescopic wrench cylinder; a ratchet wrench head is threaded onto one end of the extension rod; an operating cylinder is threaded onto the top of the telescopic wrench cylinder; an operating frame is embedded in the top of one side of the operating cylinder; a movable seat is slidably connected inside the operating frame; a hoop is fixedly connected to one side of the movable seat; four-jaw blocks are fixedly connected to the four corners of the inner wall of the operating cylinder; the hoop is fitted onto the top of the four-jaw blocks; a pull hook is hinged to the middle of the movable seat; a buckle is hinged to the bottom of the inner wall of the operating frame; a groove is formed in the middle of the pull hook; and the buckle is connected to the groove of the pull hook.

[0005] In one embodiment of the adjustable-length telescopic wrench of this utility model, guide grooves are provided on both sides of the inner wall of the operating cylinder, and guide blocks are provided on both sides of the hoop, with the guide blocks slidably connected in the guide grooves.

[0006] In this solution, by pulling down the movable seat, the guide block moves in the guide groove, causing the hoop to press down on the four-jaw clamp, which then retracts to clamp the extension rod, thus limiting the extension length of the extension rod.

[0007] In one embodiment of the adjustable-length telescopic wrench of this utility model, the top of the four-jaw block is provided with an arc-shaped anti-slip pad, and the inner side of the arc-shaped anti-slip pad is provided with several protrusions.

[0008] In this solution, the extension rod is prevented from loosening by using the arc-shaped anti-slip pad on the four-jaw clamp.

[0009] In one embodiment of the adjustable-length telescopic wrench of this utility model, a rubber pressing pad is provided on the top side of the movable seat, and the surface of the rubber pressing pad is provided with a strip groove.

[0010] In this design, the movable seat is easily moved by a rubber pressing pad.

[0011] In one embodiment of the adjustable-length telescopic wrench of this utility model, the bottom end of the movable seat is provided with a closing groove, and the bottom end of the hook is provided with a hook-shaped block, which engages with the closing groove.

[0012] In this solution, the buckle is flipped over, and the hook is flipped over to insert the buckle into the groove. The hook block is then engaged with the closing groove to fix the position of the movable seat.

[0013] In one embodiment of the adjustable-length telescopic wrench of this utility model, the ratchet wrench head has a mounting hole in the middle, a replaceable wrench head is inserted into the mounting hole, the top of the replaceable wrench head has a first assembly hole, the middle of the replaceable wrench head has a second assembly hole, and an anti-loosening screw is threaded between the first assembly hole and the second assembly hole.

[0014] In this solution, when replacing a worn replaceable wrench head, the anti-loosening screw between the first assembly hole and the second assembly hole is removed, the replaceable wrench head is pulled out of the mounting hole for replacement and reinstallation.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1) By pulling down the movable seat, the guide block moves in the guide groove, causing the hoop to press down on the four-jaw clamp. The four-jaw clamp retracts and clamps the extension rod, limiting the extension length. The arc-shaped anti-slip pad on the four-jaw clamp prevents the clamped extension rod from loosening. Flip the buckle and flip the hook to insert the buckle into the groove and engage the hook block with the closing groove to fix the position of the movable seat. When disassembling the operating cylinder, the ratchet wrench head can be removed and the operating cylinder can be pulled out from the outside of the extension rod for replacement.

[0017] 2) By removing the anti-detachment screw between the first assembly hole and the second assembly hole, the replaceable wrench head can be pulled out from the mounting hole for replacement and reinstallation, allowing the wrench to be reused and facilitating equipment maintenance. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the ratchet wrench head of this utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the operating cylinder of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the operation frame of this utility model.

[0023] In the diagram: 1. Telescopic wrench sleeve; 101. Operating sleeve; 2. Rubber grip; 3. Extension rod; 4. Ratchet wrench head; 401. Mounting hole; 402. Replaceable wrench head; 403. First assembly hole; 404. Second assembly hole; 405. Anti-loosening screw; 5. Operating frame; 6. Moving base; 61. Closure groove; 7. Hoop ring; 8. Four-jaw chuck block; 9. Hook; 91. Groove; 92. Hook-shaped block; 10. Snap ring; 11. Guide groove; 12. Guide block; 13. Arc-shaped anti-slip pad; 14. Rubber pressing pad; 15. Strip groove. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4This utility model provides the following technical solution: an adjustable-length telescopic wrench, including a wrench telescopic cylinder 1, a rubber handle 2 fixedly connected to one end of the wrench telescopic cylinder 1, an extension rod 3 movably connected inside the wrench telescopic cylinder 1, a ratchet wrench head 4 threaded to one end of the extension rod 3, an operating cylinder 101 threadedly connected to the top of the wrench telescopic cylinder 1, an operating frame 5 embedded on the top side of the operating cylinder 101, a movable seat 6 slidably connected inside the operating frame 5, a hoop 7 fixedly connected to one side of the movable seat 6, four-pronged locking blocks 8 fixedly connected to the four-pronged locking blocks 8 at the four corners of the inner wall of the operating cylinder 101, the hoop 7 sleeved on the top of the four-pronged locking blocks 8, a pull hook 9 hinged in the middle of the movable seat 6, a buckle 10 hinged to the bottom of the inner wall of the operating frame 5, a groove 91 opened in the middle of the pull hook 9, and the buckle 10 connected to the groove 91 of the pull hook 9.

[0026] For a specific embodiment of an adjustable-length telescopic wrench, please refer to... Figure 3 The inner wall of the operating cylinder 101 is provided with guide grooves 11 on both sides, and guide blocks 12 are provided on both sides of the hoop 7. The guide blocks 12 are slidably connected in the guide grooves 11.

[0027] Please see Figure 3 By pulling down the movable seat 6, the guide block 12 moves in the guide groove 11, causing the hoop 7 to press down on the four-jaw clamp 8. The four-jaw clamp 8 retracts and clamps the extension rod 3, limiting the extension length of the extension rod 3.

[0028] For a specific embodiment of an adjustable-length telescopic wrench, please refer to... Figure 3 The top of the four-claw block 8 is provided with an arc-shaped anti-slip pad 13, and the inner side of the arc-shaped anti-slip pad 13 is provided with several protrusions.

[0029] Please see Figure 3 The extension rod 3 is prevented from loosening by using the arc-shaped anti-slip pad 13 on the four-claw block 8.

[0030] For a specific embodiment of an adjustable-length telescopic wrench, please refer to... Figure 4 The top side of the movable seat 6 is provided with a rubber pressing pad 14, and the surface of the rubber pressing pad 14 is provided with a strip groove 15.

[0031] Please see Figure 4 The rubber pressing pad 14 facilitates the movement of the movable seat 6 when it is pushed.

[0032] For a specific embodiment of an adjustable-length telescopic wrench, please refer to... Figure 4 The bottom of the movable seat 6 is provided with a closing groove 61, and the bottom of the hook 9 is provided with a hook-shaped block 92, which engages with the closing groove 61.

[0033] Please see Figure 4Flip the buckle 10 and flip the hook 9 to insert the buckle 10 into the groove 91, and engage the hook block 92 with the closing groove 61 to fix the position of the movable seat 6.

[0034] For a specific embodiment of an adjustable-length telescopic wrench, please refer to... Figure 2 The ratchet wrench head 4 has a mounting hole 401 in the middle, and a replaceable wrench head 402 is inserted into the mounting hole 401. The top of the replaceable wrench head 402 has a first assembly hole 403, and the middle of the replaceable wrench head 402 has a second assembly hole 404. An anti-loosening screw 405 is threaded between the first assembly hole 403 and the second assembly hole 404.

[0035] Please see Figure 2 When replacing the worn replaceable wrench head 402, remove the anti-loosening screw 405 between the first assembly hole 403 and the second assembly hole 404, pull the replaceable wrench head 402 out of the mounting hole 401 for replacement and reinstallation.

[0036] This utility model provides an adjustable-length telescopic wrench. The specific usage is as follows: After adjusting the length of the extension rod 3, pull down the moving seat 6. The guide block 12 moves within the guide groove 11, causing the clamping ring 7 to press down on the four-jaw clamp 8. The four-jaw clamp 8 retracts and clamps the extension rod 3, limiting its extension length. The arc-shaped anti-slip pad 13 on the four-jaw clamp 8 prevents the clamped extension rod 3 from loosening. Flip the retaining ring 10 and the pull hook 9 to release the retaining ring 10. Insert the hook block 92 into the groove 91 and engage it with the closing groove 61 to fix the position of the moving seat 6. When disassembling the operating cylinder 101, the ratchet wrench head 4 can be disassembled and the operating cylinder 101 can be pulled out from the outside of the extension rod 3 for replacement. When replacing the worn replaceable wrench head 402, remove the anti-loosening screw 405 between the first assembly hole 403 and the second assembly hole 404, pull the replaceable wrench head 402 out of the mounting hole 401 for replacement and reinstallation.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A telescopic adjustable length spanner comprising a spanner telescopic barrel (1) characterised in that: The wrench telescopic cylinder (1) one end fixedly connected with rubber handle (2), the wrench telescopic cylinder (1) in the movable connection has extension rod (3), the extension rod (3) one end screw has ratchet wrench head (4), the wrench telescopic cylinder (1) top screw connection has operating cylinder (101), the operating cylinder (101) one side top inlaying has operating frame (5), the operating frame (5) in sliding connection has moving seat (6), the moving seat (6) one side fixedly connected with hoop (7), the operating cylinder (101) inner wall four corners fixedly connected with four jaw clamping block (8), the hoop (7) is set on four jaw clamping block (8) top, the moving seat (6) middle part articulates and is equipped with drag hook (9), the operating frame (5) inner wall bottom articulates has buckle ring (10), the drag hook (9) middle part is equipped with recess (91), the buckle ring (10) is connected with drag hook (9) recess (91).

2. A telescoping adjustable length wrench according to claim 1 wherein: The operating cylinder (101) inner wall both sides are equipped with guide slot (11), the hoop (7) both sides are equipped with guide block (12), the guide block (12) slidingly connects in guide slot (11).

3. An adjustable length telescopic spanner as claimed in claim 1 wherein: The four jaw clamping block (8) top is equipped with arc-shaped antiskid pad (13), the arc-shaped antiskid pad (13) inboard is equipped with several protrusions.

4. An adjustable length telescopic spanner as claimed in claim 1 wherein: The moving seat (6) top side is equipped with rubber pressing pad (14), the rubber pressing pad (14) surface is equipped with strip-shaped groove (15).

5. An adjustable length telescopic spanner as claimed in claim 1 wherein: The moving seat (6) bottom end is equipped with closure groove (61), the drag hook (9) bottom end is equipped with hook-shaped block (92), the hook-shaped block (92) is connected with closure groove (61) and is clamped.

6. An adjustable length telescopic spanner as claimed in claim 1 wherein: The ratchet wrench head (4) middle part is equipped with mounting hole (401), the mounting hole (401) is inserted and connected with replaceable wrench head (402), the replaceable wrench head (402) top end is equipped with first assembly hole (403), the replaceable wrench head (402) middle part is equipped with second assembly hole (404), the first assembly hole (403) and second assembly hole (404) are connected with anti-drop screw (405) between screw threads.

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