Ratchet wrench capable of controlling bilateral stretching

Abstract

The ratchet wrench comprises a ratchet wrench body and a bidirectional telescopic structure, the ratchet wrench body comprises a telescopic conversion limiting deflector rod, a handle, a connecting block and a connecting shaft, and a left-hand internal thread and a right-hand internal thread are arranged at the two ends of the connecting shaft respectively; the bidirectional telescopic structure comprises a right-handed rotation driving bolt, a left-handed rotation driving bolt, a gasket, a limiting stop block, a positioning pin, a gasket and an inner hexagon bolt, and the right-handed rotation driving bolt and the left-handed rotation driving bolt are connected to the two ends of the head of the ratchet wrench body through right-handed rotation internal threads and left-handed rotation internal threads correspondingly; the gasket, the positioning pin, the gasket and the inside hexagonal bolt are respectively combined with the right-handed rotation driving bolt and the left-handed rotation driving bolt to form two positioning clamping grooves; the distance between the two clamping grooves can be controlled by adjusting the telescopic conversion limiting deflector rod. According to the device, the stability in the stretching and retracting process is ensured, accurate adjustment of the distance between the MAX cab rear wall longitudinal beam U-shaped pieces is ensured, the operation efficiency is improved, and time and labor are saved.

Description

Technical Field

[0001] This utility model relates to a ratchet wrench with controllable extension and retraction on both sides, used for adjusting the spacing of welded U-shaped parts after bending the cab, and belongs to the field of mechanical technology. Background Technology

[0002] The machining of the U-shaped components of the rear longitudinal beams of the MAX cab is a critical process. Traditional methods for adjusting the spacing of these U-shaped components rely heavily on operator experience and feel, typically using hammers, tapping, or pry bars. Hammers require selecting appropriate weights based on the material, size, and adjustment range of the U-shaped components. Tapping the edges or surface alters the spacing, and metal rods can be used for precise control of force and position. Pry bars are inserted into the gaps to utilize leverage. This lack of a precise adjustment mechanism often results in U-shaped component spacing exceeding the ideal tolerance range, severely impacting the quality of subsequent welding processes. Adjusting the spacing requires repeated trial and error, which is time-consuming, labor-intensive, and inconsistent. This traditional method is insufficient for large-scale, high-precision production, necessitating a specialized tool for precise, efficient, and convenient adjustment of the U-shaped component spacing in the MAX cab rear longitudinal beams to improve product quality and reliability. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a ratchet wrench with controllable extension and retraction on both sides, which addresses the shortcomings of the existing technology, improves operating efficiency, and ensures the smoothness and accuracy of the extension and retraction process.

[0004] To solve this technical problem, this utility model provides a controllable double-sided telescopic ratchet wrench, including a ratchet wrench body and a bidirectional telescopic structure. The ratchet wrench body includes a telescopic conversion limit lever, a handle, a connecting block, and a connecting shaft. The two ends of the connecting shaft are respectively provided with a left-hand internal thread and a right-hand internal thread. The bidirectional telescopic structure includes a right-hand drive bolt, a left-hand drive bolt, a washer, a limit block, a positioning pin, a washer, and an internal hex bolt. The right-hand drive bolt and the left-hand drive bolt are respectively connected to the two ends of the ratchet wrench body head through right-hand internal threads and left-hand internal threads. The washer, positioning pin, washer, and internal hex bolt are combined with the right-hand drive bolt and the left-hand drive bolt to form two positioning slots. Adjusting the telescopic conversion limit lever and rotating the handle causes the left-hand drive bolt and the right-hand drive bolt to screw in or out, thereby controlling the distance between the two slots and realizing the reduction or expansion of the distance between the U-shaped parts.

[0005] The handle end is connected to the connecting block via a pin, and the handle is connected to the connecting shaft via the connecting block. A ratchet limiting mechanism is provided between the connecting block and the connecting shaft. The telescopic conversion limiting lever is installed on the side of the connecting block via a pin, and the ratchet wrench body is in contact with the internal ratchet limiting mechanism.

[0006] The ratchet limiting mechanism includes a ratchet, which is interference-fitted and fixed in the middle of the connecting shaft. The connecting block has a cavity, and the ratchet, telescopic conversion limiting lever, and spring pin are disposed in the cavity. The telescopic conversion limiting lever is connected to the connecting block by a pin. When the telescopic conversion limiting lever is pushed upward, the spring pin will press against the groove below the telescopic conversion limiting lever, so that the lower part of the telescopic conversion limiting lever contacts the connecting block. When the handle is turned downward, the ratchet rotates clockwise, and the screwing in of the left-hand and right-hand internal threads in the head of the ratchet wrench body will cause the groove spacing to widen. When the telescopic conversion limiting lever is pushed downward, the handle rotates upward, and the spring pin presses against the groove above the telescopic conversion limiting lever, so that the upper part of the telescopic conversion limiting lever contacts the connecting block. When the handle is turned upward, the ratchet rotates counterclockwise, and the unscrewing of the left-hand and right-hand internal threads in the head of the ratchet wrench body will cause the groove spacing to narrow.

[0007] One end of the right-hand drive bolt is provided with a thread structure that matches the right-hand internal thread, and the other end is provided with a fixing block. The fixing block and the limiting block form a groove.

[0008] The left-hand drive bolt and the right-hand drive bolt have the same structure and are symmetrical.

[0009] The limiting block and the fixing block are provided with through holes, and are fixed together to form a slot by positioning pins.

[0010] The limiting block and the fixing block have clamping surfaces on their opposing working surfaces to increase the friction of the slot.

[0011] A gasket is provided between the limiting block and the fixing block.

[0012] The gasket has three through holes. After being positioned by the positioning pin, the U-shaped piece is fixed in the slots at both ends.

[0013] The number of shims can be increased or decreased according to the thickness of the U-shaped part to increase the spacing of the slots so that the U-shaped part can be placed exactly in the slots.

[0014] Beneficial effects: This utility model eliminates the need for operators to manually adjust the spacing of the U-shaped parts of the rear longitudinal beam of the cab. The number of shims can be increased or decreased arbitrarily according to the thickness of the U-shaped parts, so that the U-shaped parts fit perfectly into the slots, improving applicability. The bidirectional telescopic device ensures the smoothness and precision of the telescopic process, guaranteeing the accurate adjustment of the spacing of the U-shaped parts of the rear longitudinal beam of the MAX cab, improving operational efficiency and saving time and effort. When the spacing is within the qualified range, it facilitates subsequent rapid welding. Attached Figure Description

[0015] Figure 1 This is a schematic front view of the structure of this utility model;

[0016] Figure 2 This is an isometric view of the main body of the ratchet wrench of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the bidirectional telescopic connection component of this utility model;

[0018] Figure 4 This is a schematic diagram of the ratchet limiting mechanism of this utility model;

[0019] Figure 5 This is an assembly diagram of the ratchet of this utility model;

[0020] Figure 6 This is a partial bottom view cross-sectional diagram of the connecting block of this utility model;

[0021] Figure 7 This is a schematic front view of the bolt of this utility model;

[0022] Figure 8 This is a schematic left view of the bolt structure of this utility model;

[0023] Figure 9 This is a bottom view illustrating the structure of the bolt of this utility model;

[0024] Figure 10 This is a schematic front view of the structure of the limiting block of this utility model;

[0025] Figure 11 This is a schematic left view of the structure of the limiting block of this utility model;

[0026] Figure 12 This is a bottom view showing the structure of the limiting block of this utility model;

[0027] Figure 13 This is a schematic diagram of the U-shaped component structure.

[0028] In the diagram: 1. Ratchet wrench body; 2. Right-hand drive bolt; 3. Left-hand drive bolt; 4. Washer; 5. Limit stop; 6. Locating pin; 7. Washer; 8. Socket headstock bolt; 9. Slot; 11. Telescopic conversion limit lever; 12. Handle; 13. Connecting block; 14. Connecting shaft; 15. Right-hand internal thread; 16. Left-hand internal thread; 17. Ratchet; 18. Pin; 19. Spring pin; 21. Threaded structure; 22. Fixing block. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figures 1-13 As shown, this utility model provides a controllable double-sided telescopic ratchet wrench, including a ratchet wrench body 1 and a bidirectional telescopic structure. The ratchet wrench body 1 includes a telescopic conversion limit lever 11, a handle 12, a connecting block 13, and a connecting shaft 14. The two ends of the connecting shaft 14 are respectively provided with a left-hand internal thread 16 and a right-hand internal thread 15. The bidirectional telescopic structure includes a right-hand drive bolt 2, a left-hand drive bolt 3, a washer 4, a limit stop 5, a positioning pin 6, a washer 7, and an internal hex bolt 8. The moving bolt 2 and the left-hand drive bolt 3 are connected to both ends of the ratchet wrench body 1 via the right-hand internal thread 15 and the left-hand internal thread 16, respectively. The gasket 4, the positioning pin 6, the washer 7, and the internal hex bolt 8 are combined with the right-hand drive bolt 2 and the left-hand drive bolt 3 to form two positioning slots 9. Adjusting the telescopic conversion limit lever 11 and rotating the handle 12 will cause the left-hand drive bolt 3 and the right-hand drive bolt 2 to screw in or out, thereby controlling the distance between the two slots 9 and realizing the reduction or expansion of the distance between the U-shaped parts.

[0031] The end of the handle 12 is connected to the connecting block 13 via a pin 18. The handle 12 is connected to the connecting shaft 14 via the connecting block 13. A ratchet limiting mechanism is provided between the connecting block 13 and the connecting shaft 14. The telescopic conversion limiting lever 11 is installed on the side of the connecting block 13 via a pin 18. The ratchet wrench body 1 is in contact with the ratchet limiting mechanism inside.

[0032] The ratchet limiting mechanism includes a ratchet 17, which is interference-fitted and fixed at the middle position of the connecting shaft 14. The connecting block 13 has a cavity, and the ratchet 17, telescopic conversion limiting lever 11, and spring pin 19 are disposed within the cavity. The telescopic conversion limiting lever 11 is connected to the connecting block 13 via a pin 18. When the telescopic conversion limiting lever 11 is pushed upwards, the spring pin 19 abuts against the groove below the telescopic conversion limiting lever 11, causing the lower part of the telescopic conversion limiting lever 11 to contact the connecting block 13. Turning the handle downwards activates the ratchet... 17. Rotating clockwise causes the left-hand internal thread 16 and the right-hand internal thread 15 inside the head of the ratchet wrench body 1 to screw in, which in turn widens the distance between the two slots 9. 12. Pushing the telescopic conversion limit lever 11 downwards causes the handle 12 to rotate upwards, and the spring pin 19 presses against the groove above the telescopic conversion limit lever 11, making the upper part of the telescopic conversion limit lever 11 contact the connecting block 13. 13. Rotating the handle upwards causes the ratchet 17 to rotate counterclockwise, and the unscrewing of the left-hand internal thread 16 and the right-hand internal thread 15 inside the head of the ratchet wrench body 1 causes the distance between the two slots 9 to narrow.

[0033] One end of the right-hand drive bolt 2 is provided with a thread structure 21 that matches the right-hand internal thread 15, and the other end is provided with a fixing block 22. The fixing block 22 and the limiting block 5 form a groove 9.

[0034] The left-hand drive bolt 3 and the right-hand drive bolt 2 have the same structure and are symmetrical.

[0035] The limiting block 5 and the fixing block 22 are provided with through holes, and are fixed to form a slot 9 by positioning pin 6.

[0036] The limiting block 5 and the fixing block 22 have clamping surfaces on their opposite working surfaces to increase the friction of the slot 9, which has a good anti-slip effect and makes it easy to fix the U-shaped part in the slot 9 after tightening.

[0037] A gasket 4 is provided between the limiting block 5 and the fixing block 22. The gasket 4 and the limiting block 5 are fixed by an internal hex bolt 8, and the washer 7 is used to prevent it from falling off.

[0038] The gasket 4 has three through holes. After being positioned by the positioning pin 6, the U-shaped piece is fixed in the slots 9 at both ends.

[0039] The number of gaskets 4 can be increased or decreased according to the thickness of the U-shaped part to increase the spacing of the slots 9 so that the U-shaped part can be placed into the slots 9.

[0040] The working process of this utility model is as follows:

[0041] Adjust the number of shims 4 according to the thickness of the U-shaped part, fix the limit block 5 after positioning with the positioning pin 6, and then place the U-shaped part in the end slots 9 for fixation. In use, the ratchet 17 engages with the telescopic conversion limit lever 11. To increase the spacing, the telescopic conversion limit lever 11 is pushed upwards, and the spring pin 19 presses against the groove below the telescopic conversion limit lever 11, causing the lower part of the telescopic conversion limit lever 11 to contact the connecting block 13. Turning the handle downwards causes the ratchet 17 to rotate clockwise, and the left-hand internal thread 16 and right-hand internal thread 15 inside the head of the ratchet wrench body 1 screw in, widening the spacing between the two slots 9. To narrow the spacing, the telescopic conversion limit lever 11 is pushed downwards, and the handle 12 can rotate upwards. The spring pin 19 presses against the groove above the telescopic conversion limit lever 11, causing the upper part of the telescopic conversion limit lever 11 to contact the connecting block 13. Turning the handle upwards causes the ratchet 17 to rotate counterclockwise, and the left-hand internal thread 16 and right-hand internal thread 15 inside the head of the ratchet wrench body 1 screw out, narrowing the spacing between the two slots 9. Once the U-shaped part spacing is adjusted to the acceptable range, subsequent welding work can be carried out.

[0042] This invention ensures precise adjustment of the spacing of the U-shaped parts of the rear longitudinal beam of the MAX cab, eliminating the need for operators to manually adjust them, thus improving operational efficiency and saving time and effort. When the spacing is within the acceptable range, it facilitates rapid subsequent welding. The number of shims can be increased or decreased arbitrarily according to the thickness of the U-shaped parts, so that they fit perfectly into the slot 9, increasing the applicability of the device.

[0043] The above-described embodiments of this utility model are merely illustrative examples and are not the only ones. All modifications within the scope of this utility model or equivalent to this utility model are encompassed by this utility model.

Claims

1. A ratchet wrench with controllable extension and retraction on both sides, characterized in that: The device includes a ratchet wrench body (1) and a bidirectional telescopic structure. The ratchet wrench body (1) includes a telescopic conversion limit lever (11), a handle (12), a connecting block (13), and a connecting shaft (14). The connecting shaft (14) has left-hand internal threads (16) and right-hand internal threads (15) at both ends. The bidirectional telescopic structure includes a right-hand drive bolt (2), a left-hand drive bolt (3), a washer (4), a limit stop (5), a positioning pin (6), a washer (7), and an internal hex bolt (8). 3) The ratchet wrench body (1) is connected to both ends of the head of the ratchet wrench body (1) by right-hand internal thread (15) and left-hand internal thread (16). The gasket (4), positioning pin (6), washer (7) and internal hex bolt (8) are combined with right-hand drive bolt (2) and left-hand drive bolt (3) to form two positioning slots (9). Adjust the telescopic conversion limit lever (11) and rotate the handle (12) to drive the left-hand drive bolt (3) and right-hand drive bolt (2) to screw in or out, thereby controlling the distance between the two slots (9) and realizing the reduction or expansion of the distance between the U-shaped parts.

2. The ratchet wrench with controllable bilateral extension and retraction according to claim 1, characterized in that: The end of the handle (12) is connected to the connecting block (13) via a pin (18). The handle (12) is connected to the connecting shaft (14) via the connecting block (13). A ratchet limiting mechanism is provided between the connecting block (13) and the connecting shaft (14). The telescopic conversion limiting lever (11) is installed on the side of the connecting block (13) via a pin (18). The ratchet wrench body (1) is in contact with the ratchet limiting mechanism inside.

3. The ratchet wrench with controllable bilateral extension and retraction according to claim 2, characterized in that: The ratchet limiting mechanism includes a ratchet (17), which is interference-fitted and fixed in the middle position of the connecting shaft (14). The connecting block (13) has a cavity. The ratchet (17), the telescopic conversion limiting lever (11), and the spring pin (19) are set in the cavity. The telescopic conversion limiting lever (11) is connected to the connecting block (13) by a pin (18). When the telescopic conversion limiting lever (11) is pushed upward, the spring pin (19) will press against the groove below the telescopic conversion limiting lever (11), so that the lower part of the telescopic conversion limiting lever (11) contacts the connecting block (13). When the handle (12) is turned downward, the ratchet (17)... 17) Rotate clockwise, the left-hand internal thread (16) and right-hand internal thread (15) inside the head of the ratchet wrench body (1) screw in, causing the gap of the slot (9) to widen; push down the telescopic conversion limit lever (11), the handle (12) rotates upward, the spring pin (19) presses against the groove above the telescopic conversion limit lever (11), so that the top of the telescopic conversion limit lever (11) contacts the connecting block (13); rotate the handle (12) upward, the ratchet (17) rotates counterclockwise, the left-hand internal thread (16) and right-hand internal thread (15) inside the head of the ratchet wrench body (1) screw out, causing the gap of the slot (9) to narrow.

4. The ratchet wrench with controllable bilateral extension and retraction according to claim 1, characterized in that: The right-hand drive bolt (2) has a thread structure (21) at one end that matches the right-hand internal thread (15), and a fixing block (22) at the other end. The fixing block (22) and the limiting block (5) form a groove (9).

5. The ratchet wrench with controllable bilateral extension and retraction according to claim 1, characterized in that: The left-hand drive bolt (3) has the same structure as the right-hand drive bolt (2), and is a left-right symmetrical structure.

6. The ratchet wrench with controllable bilateral extension and retraction according to claim 4, characterized in that: The limiting block (5) and the fixing block (22) are provided with through holes and are fixed to form a slot (9) by positioning pins (6).

7. The ratchet wrench with controllable bilateral extension and retraction according to claim 4, characterized in that: The limiting block (5) and the fixing block (22) have clamping surfaces on their opposite working surfaces to increase the friction of the slot (9).

8. The ratchet wrench with controllable bilateral extension and retraction according to claim 4, characterized in that: A gasket (4) is provided between the limiting block (5) and the fixing block (22).

9. The ratchet wrench with controllable bilateral extension and retraction according to claim 1, characterized in that: The gasket (4) has three through holes. After being positioned by the positioning pin (6), the U-shaped piece is fixed in the slots (9) at both ends.

10. The controllable double-sided extension and retraction ratchet wrench according to any one of claims 1-9, characterized in that: The number of gaskets (4) can be increased or decreased according to the thickness of the U-shaped part to increase the spacing of the slot (9) so that the U-shaped part can be placed into the slot (9).

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