Open ratchet wrench

Abstract

The utility model relates to the field of ratchet wrenches, in particular to an open ratchet wrench, which is characterized by comprising an open ratchet wrench body, one end of the open ratchet wrench body is an open ratchet wrench end with a first opening and is provided with a ratchet, a ratchet operation cavity with a second opening is arranged in the ratchet, and the open ratchet wrench further comprises a hollow operation tube. A hollow operation cavity with a third opening is formed in the hollow operation pipe, the hollow operation pipe is coaxially arranged on the ratchet wheel and connected with the ratchet wheel into a whole, and the third opening corresponds to the second opening. According to the open ratchet wrench, the hollow operation pipe with the U-shaped open cross section is combined with the open ratchet wrench body in a fitting mode, a tensioner can be conveniently installed in a narrow space in a labor-saving mode, large torsion can be applied in the narrow space, and the problem that an existing conventional hollow tool is difficult to apply force when used is solved.

Description

Technical Field

[0001] The utility model relates to the field of ratchet wrenches, and particularly to an open-end ratchet wrench. Background Art

[0002] At present, when installing some wire rope guardrails, hollow tools are usually required to assist in operating the wire rope tensioner. However, due to the limitations of its special use scenario, the operating space is relatively narrow, and the force application end of the hollow tool wrench is short. When turning a high-load tensioner, a large force is required, and it is not easy to apply force. The open-end ratchet wrench has the characteristics of labor-saving and small reciprocating movement. However, since the existing open-end ratchet wrenches are basically external structures, they cannot extend into the installation holes of the columns for operation and are not suitable for tensioners that can be hidden inside the columns. Therefore, how to better combine the functions of the two is the technical problem to be solved in this application. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an open-end ratchet wrench that combines a hollow operating tube with a U-shaped cross-section in the form of a fitting with the open-end ratchet wrench body, which can realize the relatively convenient and labor-saving installation of the tensioner in a narrow space and can apply a large torque in a narrow space to solve the problem that it is not easy to apply force when using existing conventional hollow tools.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is as follows: An open-end ratchet wrench includes an open-end ratchet wrench body. One end of the open-end ratchet wrench body is an open-end ratchet wrench end with a first opening and is provided with a ratchet. A ratchet operating cavity with a second opening is arranged inside the ratchet. It also includes a hollow operating tube. A hollow operating cavity with a third opening is arranged inside the hollow operating tube. The hollow operating tube is coaxially arranged on the ratchet and connected as a whole. The third opening corresponds to the second opening.

[0005] Further, the hollow operating tube is fixedly arranged on the ratchet.

[0006] Further, the opening width of the first opening and the opening width of the second opening are both larger than the opening width of the third opening.

[0007] Further, a number of external teeth are arranged on the outer peripheral surface of the ratchet. The external teeth are adapted to and meshed and clamped with the internal teeth of the pawl on the open-end ratchet wrench body. The ratchet is detachably connected to the plate body of the open-end ratchet wrench body through a first connecting mechanism.

[0008] Further, the first connecting mechanism includes a first snap spring and a first limiting plate. One end of the ratchet is fixedly provided with the first limiting plate, and a first clamping groove adapted to the first snap spring is provided on the outer peripheral surface of the other end of the ratchet. The first snap spring is detachably clamped in the first clamping groove, and the first limiting plate and the first snap spring respectively abut against both ends of the plate body.

[0009] Further, a connecting clamping block adapted to the ratchet operating cavity is fixedly provided on the outer peripheral surface of the hollow operating tube, and the hollow operating tube is sleeved in the ratchet operating cavity through the connecting clamping block. The connecting clamping block is detachably connected to the ratchet through a second connecting mechanism.

[0010] Further, the inner peripheral surface of the ratchet operating cavity and the outer peripheral surface of the connecting clamping block are both polygonal surfaces.

[0011] Further, the second connecting mechanism includes a second snap spring and a second limiting plate. One end of the connecting clamping block is fixedly provided with the second limiting plate, and a second clamping groove adapted to the second snap spring is provided on the outer peripheral surface of the other end of the connecting clamping block. The second snap spring is detachably clamped in the second clamping groove, and the second limiting plate and the second snap spring respectively abut against both ends of the ratchet.

[0012] Further, two symmetrical flat sections are provided in the hollow operating cavity.

[0013] Further, both ends of the hollow operating tube extend outwards and respectively protrude from the corresponding side end faces on the ratchet wrench body, and the protruding lengths of the two are the same.

[0014] As can be seen from the above description, an open ratchet wrench provided by the present utility model has the following beneficial effects:

[0015] First, it can realize the disassembly and replacement of ratchets of different specifications, which is convenient for the user to carry after disassembly.

[0016] Second, by combining the hollow operating tube with a U-shaped cross-section opening with the ratchet wrench body in the form of a fitting, the characteristics of the ratchet wrench body, such as labor-saving and small reciprocating movement, can be combined with the characteristics of the hollow operating tube that can be inserted into the column mounting hole for operation.

[0017] Third, it can realize the installation and tensioning of the tensioner more conveniently and labor-savingly in a narrow space, and can apply a large torque in a narrow space to solve the problem that the existing conventional hollow tools are not easy to exert force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an open ratchet wrench in Embodiment 1 of the present utility model.

[0019] Figure 2 It is a three-dimensional structural decomposition schematic diagram of an open ratchet wrench in Embodiment 1 of the present utility model.

[0020] Figure 3 Schematic structural diagram of the hollow operation tube in the first embodiment of the present utility model

[0021] Figure 4 Schematic diagram of the use state of an open ratchet wrench in the first embodiment of the present utility model

[0022] Figure 5 Schematic three - dimensional structure diagram of the integral molding of the ratchet and the hollow operation tube in the second embodiment of the present utility model

[0023] In the figure: 1 - open ratchet wrench body; 11 - open ratchet wrench end; 12 - first opening; 13 - ratchet; 131 - second opening; 132 - ratchet operation cavity; 133 - external teeth; 134 - first card slot; 14 - pawl; 141 - internal teeth; 15 - plate body; 2 - hollow operation tube; 21 - third opening; 22 - hollow operation cavity; 23 - connecting block; 231 - second card slot; 24 - flat section; 3 - first connecting mechanism; 31 - first snap ring; 32 - first limiting plate; 4 - second connecting mechanism; 41 - second snap ring; 42 - second limiting plate; 5 - column; 51 - mounting hole; 6 - tensioner; 7 - steel wire rope Specific embodiments

[0024] The present utility model will be further described below through specific embodiments

[0025] Embodiment 1

[0026] As Figures 1 to 4 shown, an open ratchet wrench according to the present utility model includes an open ratchet wrench body 1 and a hollow operation tube 2

[0027] One end of the open ratchet wrench body 1 is an open ratchet wrench end 11 with a first opening 12 and is provided with a ratchet 13. A ratchet operation cavity 132 with a second opening 131 is arranged inside the ratchet 13. A hollow operation cavity 22 with a third opening 21 is arranged inside the hollow operation tube 2. The hollow operation tube 2 is coaxially arranged on the ratchet 13 and connected as a whole. The third opening 21 corresponds to the second opening 131, so that the hollow operation tube 2 can follow the ratchet 13 to perform small-amplitude reciprocating motion synchronously. In addition, the opening width of the first opening 12 and the opening width of the second opening 131 are both greater than the opening width of the third opening 21. When the hollow operation tube 2 rotates to make the second opening 131 and the third opening 21 correspond to and coincide with the first opening 12, a side channel for the steel wire rope 7 to be inserted can be formed. Correspondingly, the first opening 12, the second opening 131 and the third opening 21 can be set with corresponding opening sizes according to the actual outer diameter of the steel wire rope 7. During operation, one end of the hollow operation tube 2 can be inserted from the mounting hole 51 of the column 5 to operate the tensioner 6 inside the column 5. In addition, the length of the hollow operation tube 2 can be set according to actual needs.

[0028] Correspondingly, both ends of the hollow operation tube 2 extend outwards and respectively protrude from the corresponding side end faces on the open ratchet wrench body 1 and the protruding lengths of the two are the same, so that it is easier to achieve balanced force during use.

[0029] In addition, the open ratchet wrench body 1 can adopt the structure in the prior art and has the function of one-way locking and only screwing in one direction, so it will not be elaborated here.

[0030] Preferably, the hollow operation tube 2 is in the shape of a hollow cylinder. The second opening 131 is arranged on the outer peripheral surface of the hollow operation tube 2 and penetrates through both ends thereof. Two flat cut surfaces 24 are symmetrically arranged inside the hollow operation cavity 22, so that the cross section of the hollow operation tube 2 is in the shape of a U-shaped opening. Through the arrangement of the two flat cut surfaces 24, it is convenient to be clamped with the double cut surfaces on the tensioner 6 to smoothly screw the tensioner 6.

[0031] In addition, a number of external teeth 133 are provided on the outer peripheral surface of the ratchet wheel 13. The external teeth 133 are adapted to and meshed and clamped with the internal teeth 141 of the ratchet pawl 14 on the open-end ratchet wrench body 1. The ratchet wheel 13 is detachably connected to the plate body 15 of the open-end ratchet wrench body 1 through a first connection mechanism 3. The first connection mechanism 3 includes a first snap ring 31 and a first limit plate 32. The first limit plate 32 is fixedly provided at one end of the ratchet wheel 13. Preferably, the first limit plate 32 is in an arc shape. A first card slot 134 adapted to the first snap ring 31 is provided on the outer peripheral surface of the other end of the ratchet wheel 13. The first snap ring 31 is detachably clamped in the first card slot 134. The first limit plate 32 and the first snap ring 31 respectively abut against both ends of the plate body 15. In this way, it is convenient to realize the quick disassembly and assembly between the ratchet wheel 13 and the plate body 15. Thus, the ratchet wheel 13 of different specifications can be disassembled and replaced, which is convenient for the user to carry after disassembly.

[0032] A connection block 23 adapted to the ratchet operation cavity 132 is fixedly provided on the outer peripheral surface of the hollow operation tube 2, and the hollow operation tube 2 is sleeved in the ratchet operation cavity 132 through the connection block 23. The inner peripheral surface of the ratchet operation cavity 132 and the outer peripheral surface of the connection block 23 are both in a polygonal shape. Preferably, the polygonal shape is a hexagonal shape. In this way, a stable clamping between the hollow operation tube 2 and the ratchet wheel 13 can be realized, so that the hollow operation tube 2 can follow the ratchet wheel 13 to perform small-amplitude reciprocating movements synchronously. The connection block 23 is detachably connected to the ratchet wheel 13 through a second connection mechanism 4. The second connection mechanism 4 includes a second snap ring 41 and a second limit plate 42. The second limit plate 42 is fixedly provided at one end of the connection block 23. Preferably, the second limit plate 42 is in an arc shape. A second card slot 231 adapted to the second snap ring 41 is provided on the outer peripheral surface of the other end of the connection block 23. The second snap ring 41 is detachably clamped in the second card slot 231. The second limit plate 42 and the second snap ring 41 respectively abut against both ends of the ratchet wheel 13. In this way, it is convenient to realize the quick disassembly and assembly between the hollow operation tube 2 and the ratchet wheel 13. Thus, the hollow operation tube 2 or operation tools of different specifications or different types can be disassembled and replaced, with a long service life, and it is convenient for the user to carry after disassembly. In addition, through the setting of the second connection mechanism 4, it is convenient to stably install the hollow operation tube 2 on the ratchet wheel 13 to limit the movement of the hollow operation tube 2 in the open-end ratchet wrench body 1 and ensure its safety and reliability during operation.

[0033] In addition, the other end of the open-end ratchet wrench body 1 is an open-end wrench end.

[0034] By combining the hollow operating tube 2 with a U-shaped cross-section opening in the form of a fitting with the open ratchet wrench body 1, the characteristics of the open ratchet wrench body 1, such as labor-saving and small reciprocating movement, can be combined with the characteristics of the hollow operating tube 2 that can be inserted into the installation hole 51 of the column 5 for operation. It is possible to install the tensioner 6 conveniently and labor-savingly in a narrow space, and a large torque can be applied in a narrow space to solve the problem that it is not easy to exert force when using existing conventional hollow tools.

[0035] The usage method of an open ratchet wrench according to the present utility model is as follows:

[0036] First, rotate the third opening 21 of the hollow operating tube 2 and the second opening 131 of the ratchet 13 to correspond to and coincide with the first opening 12 of the open ratchet wrench body 1. In this way, the open ratchet 13 wrench can successively engage the steel wire rope 7 in the hollow operating cavity 22 through the first opening 12, the second opening 131, and the third opening 21. Then, move the open ratchet 13 wrench towards the tensioner 6 side, and insert one end of the hollow operating tube 2 into the installation hole 51 of the column 5 until the two flat sections 24 of the hollow operating tube 2 are stuck on the double sections of the tensioner 6. Then, the open ratchet 13 wrench can be rotated to screw the tensioner 6. After the installation is completed, withdraw one end of the open ratchet 13 wrench from the installation hole 51 of the column 5. Then, re-rotate and adjust the position of the hollow operating tube 2 so that the third opening 21 of the hollow operating tube 2 and the second opening 131 of the ratchet 13 correspond to and coincide with the first opening 12 of the open ratchet wrench body 1 again. At this time, the open ratchet 13 wrench can be removed from the steel wire rope 7.

[0037] Embodiment 2

[0038] As Figure 5 shown, the difference between this embodiment and Embodiment 1 is that the hollow operating tube 2 is fixedly arranged on the ratchet 13. In actual production, the hollow operating tube 2 can be integrally formed with the ratchet 13, that is, the hollow operating tube 2 includes the ratchet 13, and the third opening 21 coincides with the second opening 131.

[0039] Other technical features are the same as those in Embodiment 1 specifically.

[0040] It should be understood that in the development process of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those ordinary technical personnel who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine work of design, manufacturing, and production.

[0041] The above are only several specific embodiments of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantive modification made to the present utility model using this concept shall fall within the act of infringing the protection scope of the present utility model.

Claims

1. An open-end ratchet wrench, comprising an open-end ratchet wrench body, one end of the open-end ratchet wrench body is an open-end ratchet wrench end with a first opening and is provided with a ratchet, and a ratchet operation cavity with a second opening is arranged inside the ratchet, and it is characterized in that: It further includes a hollow operating tube, within which there is a hollow operating cavity with a third opening. The hollow operating tube is coaxially arranged on the ratchet and connected integrally, and the third opening corresponds to the second opening.

2. The open ratchet wrench according to claim 1, wherein: The hollow operating tube is fixedly arranged on the ratchet.

3. The open ratchet wrench according to claim 1, characterized in that: The opening width of the first opening and the opening width of the second opening are both greater than the opening width of the third opening.

4. The open ratchet wrench according to claim 1, wherein: A number of external teeth are provided on the outer peripheral surface of the ratchet, and the external teeth are adapted to and meshed and clamped with the internal teeth of the pawl on the open ratchet wrench body. The ratchet is detachably connected to the plate body of the open ratchet wrench body through a first connecting mechanism.

5. The open ratchet wrench according to claim 4, characterized in that: The first connecting mechanism includes a first snap ring and a first limiting plate. The first limiting plate is fixedly arranged at one end of the ratchet, and a first clamping groove adapted to the first snap ring is provided on the outer peripheral surface at the other end of the ratchet. The first snap ring is detachably clamped in the first clamping groove, and the first limiting plate and the first snap ring respectively abut against both ends of the plate body.

6. The open ratchet wrench according to claim 1, characterized in that: A connecting clamping block adapted to the ratchet operating cavity is fixedly arranged on the outer peripheral surface of the hollow operating tube, and the hollow operating tube is sleeved in the ratchet operating cavity through the connecting clamping block. The connecting clamping block is detachably connected to the ratchet through a second connecting mechanism.

7. The open ratchet wrench according to claim 6, characterized in that: The inner peripheral surface of the ratchet operating cavity and the outer peripheral surface of the connecting clamping block are both polygonal surfaces.

8. The open ratchet wrench according to claim 6, wherein: The second connecting mechanism includes a second snap ring and a second limiting plate. The second limiting plate is fixedly arranged at one end of the connecting clamping block, and a second clamping groove adapted to the second snap ring is provided on the outer peripheral surface at the other end of the connecting clamping block. The second snap ring is detachably clamped in the second clamping groove, and the second limiting plate and the second snap ring respectively abut against both ends of the ratchet.

9. The open ratchet wrench according to claim 1, characterized in that: Two symmetrically arranged flat cutting surfaces are provided in the hollow operating cavity.

10. A kind of open ratchet wrench according to claim 1, characterized in that: Both ends of the hollow operating tube extend outwards and respectively protrude from the corresponding side end surfaces on the open ratchet wrench body, and the protruding lengths of the two are the same.

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