An ultra-thin hydraulic wrench

Abstract

The utility model discloses an ultrathin hydraulic wrench, including wrench casing, the ratchet wheel and the stop retreat pawl of installation in wrench casing, set up in the hydraulic cavity of wrench casing, the piston rod of slidable installation in the hydraulic cavity and with the pawl of piston rod connection drive ratchet wheel rotation, the wrench casing still is equipped with reaction arm, its characterized in that the wrench casing adopts aluminium profile outer casing, the stop retreat pawl, the outer surface of pawl and ratchet wheel and the inner surface of ratchet wheel all are equipped with the polytetrafluoroethylene layer of improving wear resistance and lubricity. The utility model discloses by wrench casing and reaction arm all are made of aluminium profile, can reduce the thickness of wrench casing, thereby reduce the thickness of wrench whole, expand the scope of use, can also reduce the weight of whole simultaneously, thereby improve the convenience of carrying, improve the wear resistance between the stop retreat pawl and pawl and ratchet wheel through the polytetrafluoroethylene layer, reduce the abrasion when using, prolong the service life.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic wrench technology, specifically to an ultra-thin hydraulic wrench. Background Technology

[0002] A hydraulic wrench is a common tool used for tightening and loosening large-diameter bolts, powered by a hydraulic system. It is widely used in industries such as wind power, petrochemicals, rail transportation, and heavy machinery. Existing technology typically employs a one-piece structure, resulting in a relatively large overall thickness. In practical work, situations often arise where the space occupied by the bolt is extremely confined. Traditional hydraulic wrenches, due to size limitations, cannot be inserted or rotated, forcing operators to resort to manual hammering or extending the lever arm—primitive methods that are inefficient, labor-intensive, and lack precise torque control, posing serious safety and quality hazards. Over time, wear easily occurs between the pawl and ratchet, affecting normal use. Furthermore, friction during bolt removal / installation tool insertion into the ratchet can cause slippage, hindering normal operation and often requiring lubrication during assembly. Therefore, an ultra-thin hydraulic wrench is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide an ultra-thin hydraulic wrench to solve the above problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ultra-thin hydraulic wrench, comprising a wrench housing, a ratchet and a stop pawl installed within the wrench housing, a hydraulic cavity disposed within the wrench housing, a piston rod slidably installed within the hydraulic cavity, and a pawl connected to the piston rod to drive the ratchet to rotate; a reaction arm is also installed on the wrench housing; characterized in that the wrench housing is made of aluminum profile; the stop pawl, the pawl, and the outer surface of the ratchet and the inner surface of the ratchet are all provided with a polytetrafluoroethylene layer to improve wear resistance and lubricity.

[0005] Preferably, the reaction arm is adjustablely mounted on the wrench housing; the reaction arm includes a fixed mounting base, an action arm adjustablely mounted on the fixed mounting base, a pin connecting the fixed mounting base and the action arm, and a locking structure mounted on the pin to lock the action arm after adjustment.

[0006] Preferably, the mounting bracket is screwed onto the wrench housing.

[0007] Preferably, the locking structure includes a locking member movably mounted on the pin to limit the movement of the actuating arm, a return spring mounted between the fixed mounting base and the locking member, and a plurality of locking bosses provided on the locking member.

[0008] Preferably, the actuating arm is provided with a locking groove that matches the locking boss.

[0009] Preferably, the pin is further provided with a boss to prevent the locking element from rotating.

[0010] Preferably, the wrench housing is also provided with an oil inlet / outlet channel communicating with the hydraulic cavity; a rear cover is also installed at the hydraulic cavity.

[0011] Preferably, a spring is installed between the wrench housing and the anti-reverse pawl and the pawl.

[0012] The beneficial effects of this utility model are as follows: by making both the wrench housing and the reaction arm from aluminum profiles, the thickness of the wrench housing can be reduced, thereby reducing the overall thickness of the wrench. This allows the wrench to be used directly in confined spaces, precisely control torque, improve efficiency, expand the range of applications, and at the same time reduce the overall weight, thereby improving portability. By applying a polytetrafluoroethylene (PTFE) layer to both the outer and inner surfaces of the anti-reverse pawl, the wear resistance of the anti-reverse pawl and the pawl and the ratchet, the smoothness of the pawl pushing the ratchet and the installation / removal of bolts into the ratchet is improved, reducing wear during use and extending service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a structural schematic diagram of one embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of a partial structure of this utility model.

[0016] Figure 4 This is a structural schematic diagram of the locking component of this utility model.

[0017] Figure 5 This is a partial structural schematic diagram of the working arm of this utility model.

[0018] Figure 6 This is a schematic diagram of the structure of the pin of this utility model.

[0019] Legend: 1. Wrench housing; 101. Hydraulic cavity; 102. Piston rod; 103. Oil inlet / outlet channel; 104. Rear cover; 2. Ratchet; 3. Pad; 4. Reaction arm; 401. Fixed mounting base; 402. Actuating arm; 403. Pin; 404. Locking structure; 405. Locking element; 406. Return spring; 407. Locking boss; 408. Locking groove; 409. Boss; 5. Anti-reverse pad; 6. Spring; 7. PTFE layer. Detailed Implementation

[0020] The following description, in conjunction with the accompanying drawings, further illustrates an ultra-thin hydraulic wrench according to this utility model.

[0021] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0022] In one embodiment, see Appendix Figure 1 As shown, this embodiment of an ultra-thin hydraulic wrench includes a wrench housing 1, a ratchet 2 and a stop pawl 5 installed inside the wrench housing 1, a hydraulic cavity 101 disposed inside the wrench housing 1, a piston rod 102 slidably installed inside the hydraulic cavity 101, and a pawl 3 connected to the piston rod 102 to drive the ratchet 2 to rotate; a reaction arm 4 is also installed on the wrench housing 1; characterized in that the wrench housing 1 is made of aluminum profile shell; the outer surface of the stop pawl 5, the pawl 3, and the ratchet 2, and the inner surface of the ratchet 2 are all provided with a polytetrafluoroethylene layer 7 to improve wear resistance and lubricity; by making both the wrench housing 1 and the reaction arm 4 from aluminum profile, the thickness of the wrench housing 1 can be reduced, thereby reducing the overall thickness of the wrench, allowing the wrench to be used directly in confined spaces, precisely controlling torque, improving efficiency, expanding the range of applications, and also reducing the overall weight, thereby improving portability; By providing a polytetrafluoroethylene layer 7 on the outer surface of the anti-reverse pawl 5, pawl 3, and ratchet 2, as well as on the inner surface of the ratchet 2, the wear resistance between the anti-reverse pawl 5 and pawl 3 and the ratchet 2 is improved. At the same time, the smoothness of the pawl 3 pushing the ratchet 2 and the bolt installation / disassembly assembly into the ratchet 2 is improved, reducing wear during use and extending service life.

[0023] See appendix Figure 1As shown, springs 6 are installed between the wrench housing 1 and the anti-reverse pawl 5 and pawl 3; the wrench housing 1 is also provided with an oil inlet / outlet channel 103 communicating with the hydraulic cavity 101; a rear cover 104 is also installed at the hydraulic cavity 101; by using the anti-reverse pawl 5 to limit the ratchet 2, it is prevented that when the pawl 3 pushes the ratchet 2 to rotate forward, the ratchet 2 will reverse when the pawl 3 disengages from the ratchet 2.

[0024] In one embodiment, see Appendix Figure 2-6 As shown, the reaction arm 4 is adjustablely mounted on the wrench housing 1; the reaction arm 4 includes a fixed mounting base 401, an action arm 402 adjustablely mounted on the fixed mounting base 401, a pin 403 connecting the fixed mounting base 401 and the action arm 402, and a locking structure 404 mounted on the pin 403 to lock the action arm 402 after adjustment; the fixed mounting base 401 is screwed onto the wrench housing 1; by adjusting the angle of the reaction arm 4 on the wrench housing 1, it is easier to find a reliable reaction point in complex and confined spaces, greatly improving the practicality and applicability of the wrench.

[0025] See appendix Figure 4-5 As shown, the locking structure 404 includes a locking member 405 movably mounted on a pin 403 to limit the movement of the actuating arm 402, a return spring 406 mounted between the fixed mounting base 401 and the locking member 405, and a plurality of locking bosses 407 disposed on the locking member 405; the locking bosses 407 are evenly distributed circumferentially on the locking member 405; the actuating arm 402 is provided with a locking groove 408 adapted to the locking bosses 407; the pin 403 is also provided with a boss 409 to prevent the locking member 405 from rotating; by pushing the locking member 405 along the pin 403... The moving disengagement arm 402 compresses the return spring 406. At this time, the arm 402 rotates along the pin 403 to adjust the angle. After adjustment, the locking member 405 is released. The elasticity of the return spring 406 pushes the locking member 405 to move along the pin 403, and the locking boss 407 on the locking member 405 is installed into the locking groove 408 on the arm 402 to match, thus locking the arm 402 to prevent it from rotating. The boss 409 on the pin 403 limits the radial movement of the locking member 405 to prevent it from rotating.

[0026] In the angle adjustment process of this utility model, the locking member 405 is pushed to move in the opposite direction along the pin 403 and the boss 409 provided on the pin 403 to disengage from the actuating arm 402 and compress the return spring 406. At this time, the actuating arm 402 rotates along the pin 403 to adjust the angle. After the adjustment is completed, the locking member 405 is released. The elasticity of the return spring 406 itself pushes the locking member 405 to move along the pin 403 and the boss 409 provided on the pin 403, so that the locking boss 407 on the locking member 405 is installed into the locking groove 408 on the actuating arm 402 to match, thereby locking the actuating arm 402 to prevent it from rotating.

[0027] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. An ultra-thin hydraulic wrench, comprising a wrench housing (1), a ratchet (2) and a stop pawl (5) installed within the wrench housing (1), a hydraulic cavity (101) disposed within the wrench housing (1), a piston rod (102) slidably installed within the hydraulic cavity (101), and a pawl (3) connected to the piston rod (102) to drive the ratchet (2) to rotate; a reaction arm (4) is also installed on the wrench housing (1); characterized in that... The wrench housing (1) is made of aluminum profile; the outer surface of the anti-reverse pawl (5), pawl (3) and ratchet (2) and the inner surface of the ratchet (2) are all provided with a polytetrafluoroethylene layer (7) to improve wear resistance and lubrication.

2. The ultra-thin hydraulic wrench according to claim 1, characterized in that: The reaction arm (4) is adjustablely mounted on the wrench housing (1); the reaction arm (4) includes a fixed mounting base (401), an action arm (402) adjustablely mounted on the fixed mounting base (401), a pin (403) for mounting the fixed mounting base (401) and the action arm (402), and a locking structure (404) mounted on the pin (403) for locking the action arm (402) after adjustment.

3. The ultra-thin hydraulic wrench according to claim 2, characterized in that: The fixed mounting base (401) is screwed onto the wrench housing (1) by threads.

4. The ultra-thin hydraulic wrench according to claim 2, characterized in that: The locking structure (404) includes a locking member (405) that is movably mounted on a pin (403) to limit the action arm (402), a return spring (406) mounted between the fixed mounting base (401) and the locking member (405), and a plurality of locking bosses (407) provided on the locking member (405).

5. The ultra-thin hydraulic wrench according to claim 4, characterized in that: The actuating arm (402) is provided with a locking groove (408) that is adapted to the locking boss (407).

6. The ultra-thin hydraulic wrench according to claim 3, characterized in that: The pin (403) is also provided with a boss (409) to prevent the locking element (405) from rotating.

7. The ultra-thin hydraulic wrench according to claim 1, characterized in that: The wrench housing (1) is also provided with an oil inlet / outlet channel (103) communicating with the hydraulic cavity (101); a rear cover (104) is also installed at the hydraulic cavity (101).

8. The ultra-thin hydraulic wrench according to claim 7, characterized in that: Springs (6) are installed between the wrench housing (1) and the anti-reverse pawl (5) and pawl (3).

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