Ratchet wrench with replaceable accessories

Abstract

A ratchet wrench with replaceable accessories relates to the technical field of wrenches. Comprising a wrench body with a ratchet wheel hole and a wrench head detachably and rotatably arranged in the ratchet wheel hole. Ratchets are arranged on the outer ring of the wrench head; an arc-shaped groove matched with the pawl is formed in the side wall of the ratchet wheel hole; the wrench is characterized in that a mounting hole communicated with the arc-shaped groove is formed in the outer side of the wrench body; the mounting holes are matched with the pawls, and the pawls can enter the arc-shaped grooves from the mounting holes; a connecting column which is detachably and fixedly connected is arranged in the mounting hole; a spring is arranged between the connecting column and the pawl, and the pawl is pushed into the front end of the arc-shaped groove through the spring. According to the scheme, the screw on the side face of the wrench body can be unscrewed, and the damaged pawl or spring is taken out and replaced with a new pawl or spring.

Description

Technical Field

[0001] The utility model relates to the technical field of wrenches, in particular to a ratchet wrench with replaceable accessories. Background Art

[0002] After a traditional wrench works forward at a certain angle, it is necessary to withdraw the wrench from the bolt, retreat a certain angle, and then put it on the bolt to continue working. This kind of wrench not only has low working efficiency, but also has relatively high requirements for the working space.

[0003] In response to this problem, the applicant of this case developed and designed a ratchet ring spanner, including a wrench body with a ratchet hole and a wrench head arranged in the ratchet hole. The inner hole of the wrench head is provided with a plum blossom hole adapted to a nut, and the outer ring of the wrench head is provided with ratchet teeth, so that the outer ring of the wrench head forms a ratchet shape; a circular arc groove is arranged on the side wall of the ratchet hole facing the wrench handle on the wrench body, and a one-way ratchet pawl mechanism is arranged in the circular arc groove. The one-way ratchet pawl mechanism includes a pawl and a spring. The pawl meshes with the ratchet teeth on the outer ring of the wrench head; a concave hole is arranged on the arc surface of the circular arc groove, and the concave hole deviates from the axis of the wrench body and is located on one side of the circular arc groove; one end of the spring is arranged in the concave hole, and the other end presses the pawl against the other side of the circular arc groove; so that the spring is in a bent working state.

[0004] The working principle of the ratchet wrench is that after the ratchet and the pawl are subjected to positive force, through the cooperation of the ratchet and the pawl, the ratchet rotates with the wrench body to screw the screw. Because the number of teeth of the ratchet is several times that of the pawl, in daily use, the pawl is generally the first to fail and be damaged; the disassembly and replacement of the existing structure of the ratchet wrench are relatively troublesome. It is necessary to separate the ratchet from the wrench body in advance to disassemble the internal pawl structure. The disassembly process is relatively cumbersome and is likely to cause damage to the ratchet. Therefore, designing a ratchet wrench with efficient and simple pawl replacement can improve the efficiency of customer use, maintenance and repair, and increase the service life of the wrench. Summary of the Utility Model

[0005] The utility model aims at the above problems and provides a ratchet wrench with replaceable accessories, which has a delicate structure and improves the efficiency of disassembly, maintenance and replacement.

[0006] The technical solution of the utility model is as follows:

[0007] A ratchet wrench with replaceable accessories, including a wrench body with a ratchet hole and a wrench head detachably and rotatably arranged in the ratchet hole; the outer ring of the wrench head is provided with ratchet teeth; an arc groove adapted to a pawl is arranged on the side wall of the ratchet hole; characterized in that an installation hole communicated with the arc groove is arranged on the outer side of the wrench body; the installation hole is adapted to the pawl, and the pawl can enter the arc groove from the installation hole;

[0008] A connecting column is arranged in the installation hole and is detachably and fixedly connected;

[0009] A spring is provided between the connecting column and the pawl, and the pawl is pushed into the front end of the arc-shaped groove by the spring.

[0010] Specifically, a first limit post adapted to the spring is provided at the tail of the pawl.

[0011] Specifically, a second limit post adapted to the spring is provided at the front end of the connecting column.

[0012] Specifically, a tool rotation groove is provided at the tail end of the connecting column.

[0013] Specifically, the tool rotation groove is in a shape of a straight line, a cross or a polygon.

[0014] Specifically, the wrench head is limited in the ratchet hole by a circlip.

[0015] Advantages of the present utility model:

[0016] The working principle of the ratchet wrench is that after the ratchet and the pawl are subjected to positive force, through the cooperation of the ratchet and the pawl, the ratchet rotates with the wrench body to screw the screw. Since the number of teeth of the ratchet is several times that of the pawl, in daily use, the pawl is generally the first to fail and be damaged. In this case, the screw on the side of the wrench body can be unscrewed, the damaged pawl or spring can be taken out, and a new pawl and spring can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the three-dimensional split structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the three-dimensional structure of the connecting column and the pawl;

[0019] Figure 3 is a schematic diagram of the structure of the pawl in the installed state;

[0020] Figure 4 is a schematic diagram of the three-dimensional structure of the wrench section;

[0021] In the figure, 100 is the wrench body, 110 is the arc-shaped groove,

[0022] 200 is the wrench head, 210 is the wrench hole, 220 is the ratchet teeth,

[0023] 300 is the pawl,

[0024] 400 is the connecting column,

[0025] 500 is the spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] The following refers to Figures 1-4 Describe according to the present utility model;

[0030] A ratchet wrench with replaceable accessories, including a wrench body 100 having a ratchet hole and a wrench head 200 detachably and rotatably arranged in the ratchet hole; a wrench hole 210 adapted to a fastener is provided inside the wrench head 200, and a ratchet tooth 220 is provided on the outer ring of the wrench head 200; an arc-shaped groove 110 adapted to a pawl 300 is provided on the side wall of the ratchet hole; the pawl 300 cooperates with the ratchet tooth 220 of the wrench head 200;

[0031] An installation hole communicating with the arc-shaped groove 110 is provided on the outer side of the wrench body 100; the installation hole is adapted to the pawl 300, and the pawl 300 can enter the arc-shaped groove 110 from the installation hole;

[0032] A connecting column 400 detachably and fixedly connected thereto by a thread is provided in the installation hole;

[0033] A spring 500 is provided between the connecting column 400 and the pawl 300, and the pawl 300 is pushed into the front end of the arc-shaped groove 110 ( Figure 3 In, the bottom end of the arc-shaped groove 110).

[0034] In addition to facilitating the replacement of the pawl, this case can also meet the usual addition and maintenance of lubricating grease. After removing the connecting column 400, the spring 500 and the pawl 300 are taken out at the same time. Lubricating grease is added to the pawl 300 and the arc-shaped groove 110 respectively to achieve efficient maintenance of the wrench head 200 and the pawl 300, solving the pain point that it is difficult to normally supplement lubricating grease in the original structure.

[0035] A first limit post adapted to the spring 500 is provided at the tail of the pawl 300. An arc-shaped back adapted to the arc-shaped groove 110 is provided on the back (the side without teeth) of the pawl 300 to improve the stability of the pawl 300 after being inserted into the arc-shaped groove 110.

[0036] A second limit post adapted to the spring 500 is provided at the front end of the connecting column 400.

[0037] Such as Figure 2 As shown, annular bosses protruding outward along the outer circumference are respectively provided at the free ends of the first limit post and the second limit post. After the spring 500 is sleeved on the corresponding limit post, the reliability of the connection of the spring 500 is improved through the restriction of the annular bosses.

[0038] A tool rotation groove is provided at the tail end of the connecting column 400.

[0039] The tool rotation groove is in a shape of a straight line, a cross or a polygon.

[0040] The wrench head 200 is limited in the ratchet hole by a circlip.

[0041] Regarding the content disclosed in this case, the following points need to be explained:

[0042] (1). The attached drawings of the embodiments disclosed in this case only involve the structures related to the disclosed embodiments, and other structures can refer to the usual designs;

[0043] (2). Without conflict, the disclosed embodiments and the features in the embodiments in this case can be combined with each other to obtain new embodiments;

[0044] The above is only the specific implementation manners disclosed in this case, but the protection scope of this disclosure is not limited thereto. The protection scope disclosed in this case shall be subject to the protection scope of the claims.

Claims

1. A ratchet wrench with replaceable accessories, comprising a wrench body (100) having a ratchet hole and a wrench head (200) detachably and rotatably arranged in the ratchet hole; the wrench head (200) is provided with ratchet teeth (220) on its outer ring; the side wall of the ratchet hole is provided with an arc groove (110) adapted to a ratchet pawl (300); characterized in that: The outer side of the lever body (100) is provided with a mounting hole connected to the arc-shaped groove (110); the mounting hole is adapted to the ratchet pawl (300), and the ratchet pawl (300) can enter the arc-shaped groove (110) from the mounting hole; A detachably fixed connection column (400) is provided in the installation hole; A spring (500) is provided between the connecting column (400) and the ratchet (300), and the ratchet (300) is pushed into the front end of the arc-shaped groove (110) by the spring (500).

2. The ratchet wrench with replaceable accessories according to claim 1, characterized in that: The tail of the pawl (300) is provided with a first limiting column adapted to the spring (500).

3. The ratchet wrench with replaceable accessories according to claim 1, characterized in that: A second limiting column adapted to the spring (500) is provided at the front end of the connecting column (400).

4. The ratchet wrench with replaceable accessories according to claim 1 or 3, characterized in that: A tool rotation groove is provided at the rear end of the connecting column (400).

5. The ratchet wrench with replaceable accessories according to claim 4, characterized in that: The tool rotation groove is in a straight line shape, a cross shape or a polygon shape.

6. The ratchet wrench with replaceable accessories according to claim 1, characterized in that: The wrench head (200) is restrained in the ratchet hole by a retaining spring.

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