Novel three-section type torque wrench

Abstract

The utility model provides a novel three-section type torque wrench which comprises an inner hexagonal sleeve, an inner-layer handle, a middle-layer handle, an outer-layer handle, a middle-layer locking groove, a middle-layer locking block, an outer-layer locking groove and an outer-layer locking block, the outer-layer handle is arranged outside the middle-layer handle in a sleeved mode, the middle-layer handle is arranged outside the inner-layer handle in a sleeved mode, and the outer-layer locking block is arranged outside the middle-layer handle in a sleeved mode. The front end of the inner-layer handle extends out of the middle-layer handle and is connected to the side surface of the inner hexagonal sleeve; the middle-layer locking groove and the outer-layer locking groove are formed in the inner wall face of the middle-layer handle and the inner wall face of the outer-layer handle at equal intervals respectively, and the middle-layer locking block and the outer-layer locking block are both installed on the inner-layer handle. The utility model has the advantages of small and reasonable integral design, quickness, safety, time saving, convenience in carrying and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of railway maintenance tools, in particular to a novel three-section torque wrench. Background Art

[0002] The splint joint bolts are an important component of railway maintenance splints. They are crucial to the connection between the splint and the rails. In recent years, the problem of bolt breakage has occurred frequently, especially in winter, causing hidden dangers to maintenance equipment, seriously affecting the safe operation of trains, and increasing the maintenance cost of maintenance equipment.

[0003] Given the critical role of joint bolts in railway maintenance equipment, broken joint bolts pose a significant safety hazard to railway operations. Railway maintenance departments are required to promptly replace any broken or loose joint bolts. Given the large number of joint bolts on railway lines, when maintenance personnel discover a broken joint bolt during operation, conventional torque wrenches are inconvenient to carry and cannot be replaced promptly. This poses a safety hazard and can easily lead to overdue replacements, impacting train operations.

[0004] During the process of replacing the joint bolts, due to the long handle of the ordinary torque wrench, there are safety hazards such as the front and rear personnel being injured, and the use of ordinary torque wrenches affecting the replacement time. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes a new three-section torque wrench to solve the problems in the above background technology such as the inconvenience in replacing joint bolts, the safety hazard of being injured, and the use of ordinary torque wrenches affecting the replacement time, thereby improving the efficiency of replacing joint bolts, reducing safety hazards, and ensuring the safety of train operation.

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

[0007] A novel three-section torque wrench comprises an inner hexagon socket, an inner handle, a middle handle, an outer handle, a middle locking groove, a middle locking block, an outer locking groove and an outer locking block, wherein:

[0008] The outer handle is sleeved on the outside of the middle handle, and the middle handle is sleeved on the outside of the inner handle. The front end of the inner handle extends out of the middle handle and is connected to the side of the hexagonal sleeve.

[0009] The middle lock groove and the outer lock groove are respectively equidistantly arranged on the inner wall surfaces of the middle handle and the outer handle, and the middle lock block and the outer lock block are both installed on the inner handle;

[0010] The inner diameter of the outer handle is greater than the outer diameter of the middle handle, the inner diameter of the middle handle is greater than the outer diameter of the inner handle, and the difference between the inner diameter of the outer handle and the outer diameter of the middle handle is equal to the difference between the inner diameter of the middle handle and the outer diameter of the inner handle;

[0011] The front end of the outer handle is provided with an outer collar, and the inner surface of the outer collar is in contact with the outer surface of the middle handle. The front end of the middle handle is provided with a middle collar, the inner surface of the middle collar has a circular cross-section, and the inner surface of the middle collar is in line contact with the surface of the inner handle.

[0012] The outer locking block and the inner locking block are both perpendicular to the axial direction of the inner hexagonal sleeve, and the outer handle and the middle handle are tilted to one side so that the outer locking groove is covered with the outer end of the outer locking block, and the middle locking groove is covered with the outer end of the middle locking block.

[0013] Furthermore, a through slot is provided on the side of the middle handle, and the outer end of the outer locking block passes through the through slot.

[0014] Furthermore, the middle locking block is provided on both sides of the outer locking block, and the outer locking groove and the middle locking groove are both arranged in an annular structure.

[0015] Furthermore, the middle locking block and the outer locking block are both arranged at the rear end of the inner handle.

[0016] Furthermore, a sliding rod is passed through the inner handle, and a triangular top block is provided at the front end of the sliding rod, and the front end of the top block extends into the inner hexagonal sleeve. The inner ends of the middle locking block and the outer locking block are rotatably mounted on the tail end of the sliding rod, and strip holes are provided on the middle locking block and the outer locking block. A mounting rod is passed through the strip hole, and the mounting rod is fixedly connected to the inner handle, and a front top spring is provided between the rear end of the sliding rod and the rear end of the inner handle.

[0017] The utility model has the following beneficial effects:

[0018] To address the inconvenience of replacing existing railway engineering joint bolts, the potential safety hazard of injury, and the time-consuming replacement process caused by using ordinary torque wrenches, the new three-section torque wrench proposed in this application improves the efficiency of replacing joint bolts, reduces safety hazards, and ensures safe train operation. The overall design is compact and reasonable, and the tools required for replacing joint bolts have been modified to achieve the advantages of speed, safety, and time saving without affecting the actual function. The overall material is easy to carry and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 This utility model Figure 2 A magnified view of point A in the figure;

[0022] Figure 4 This utility model Figure 2 Enlarged view of point B in .

[0023] In the figure: 1. Hexagon socket; 2. Inner handle; 3. Middle handle; 4. Outer handle; 5. Middle locking groove; 6. Middle locking block; 7. Outer locking groove; 8. Outer locking block; 9. Outer collar; 10. Middle collar; 11. Through groove; 12. Sliding rod; 13. Top block; 14. Strip hole; 15. Mounting rod; 16. Front top spring. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figures 1 to 4 As shown, a typical embodiment of the present invention provides a novel three-section torque wrench, including a hexagonal socket 1, an inner handle 2, a middle handle 3, an outer handle 4, a middle locking groove 5, a middle locking block 6, an outer locking groove 7 and an outer locking block 8, wherein:

[0026] The outer handle 4 is sleeved on the outside of the middle handle 3, which is sleeved on the outside of the inner handle 2. The front end of the inner handle 2 extends out of the middle handle 3 and is connected to the side of the hexagonal socket 1. The middle handle 3 and the outer handle 4 are both tubular structures with an open front end and a closed rear end. The inner handle 2 is fixedly connected to the hexagonal socket 1.

[0027] The middle locking groove 5 and outer locking groove 7 are equidistantly defined on the inner wall surfaces of the middle handle 3 and outer handle 4, respectively, and are evenly distributed along the axial direction. The middle locking block 6 and outer locking block 8 are both mounted on the inner handle 2. The middle locking block 6 enters the middle locking groove 5 through its outer end to lock the inner handle 2 and the middle handle 3. The outer handle 4 enters the outer locking groove 7 through its outer end to lock the middle handle 3 and the outer handle 4.

[0028] The inner diameter of the outer handle is greater than the outer diameter of the middle handle 3, the inner diameter of the middle handle 3 is greater than the outer diameter of the inner handle 2, and the difference between the inner diameter of the outer handle 4 and the outer diameter of the middle handle 3 is equal to the difference between the inner diameter of the middle handle 3 and the outer diameter of the inner handle 2. In the locked state, the length of the outer end of the middle locking block 6 extending beyond the inner handle 2 is the same as the length of the outer end of the outer locking block 8 extending beyond the middle handle 3.

[0029] The front end of the outer handle 4 is provided with an outer collar 9, the inner surface of which is in contact with the outer surface of the middle handle 3. The front end of the middle handle 3 is provided with a middle collar 10, the inner surface of which is a circular cross-section. The inner surface of the middle collar 10 is in line contact with the surface of the inner handle 2, while the inner surface of the outer collar 9 is in surface contact with the outer surface of the middle handle 3. At this time, the rear end of the middle handle 3 can swing, and when the middle handle 3 swings, the outer handle 4 can swing synchronously with it.

[0030] The outer locking block 8 and the inner locking block are both perpendicular to the axial direction of the hexagonal sleeve 1. The outer handle 4 and the middle handle 3 are tilted to one side so that the outer locking groove 7 is covered with the outer end of the outer locking block 8, and the middle locking groove 5 is covered with the outer end of the middle locking block 6.

[0031] In this embodiment, when the middle handle 3 and the inner handle 2 are parallel, the middle locking block 6 is separated from the middle locking groove 5, and the outer locking block 8 is separated from the outer locking groove 7. At this point, the middle handle 3 can be flexibly pulled from the outside of the inner handle 2, or the outer handle 4 can be pulled from the outside of the middle handle 3 to adjust the wrench to the appropriate length. During the process of turning the bolt or nut, the middle handle 3 and the outer handle 4 swing outward from the inner handle 2 in the direction of turning the bolt or nut, so that the middle locking groove 5 fits over the outer end of the middle locking block 6, and the outer locking groove 7 fits over the outer end of the outer locking block 8. This, in turn, secures the inner handle 2 to the middle handle 3, and the middle handle 3 to the outer handle 4 in the longitudinal direction. Furthermore, during the process of turning the nut or bolt, the overall length of the wrench handle portion remains unchanged.

[0032] On this basis, a through slot 11 is formed on the side of the middle handle 3, and the outer end of the outer locking block 8 passes through the through slot 11. Specifically, when the middle handle 3 moves on the inner handle 2, the through slot 11 moves outside the outer locking block 8, and the through slot 11 provides space for the outer end of the outer locking block 8 to be inserted into the outer locking groove 7.

[0033] A middle locking block 6 is provided on either side of the outer locking block 8. The outer locking groove 7 and the middle locking groove 5 are both arranged in an annular structure. Specifically, in this embodiment, there are two outer locking blocks 8, which are symmetrically distributed on either side of the inner handle 2. Each outer locking block 8 is provided with a middle locking block 6 on both sides, and the middle locking blocks 6 are located on both sides of the through groove 11.

[0034] The middle locking block 6 and the outer locking block are both arranged at the rear end of the inner handle 2. Such arrangement enables the middle handle 3 and the outer handle 4 to have a maximum distance for rearward displacement, thereby maximizing the overall length of the wrench.

[0035] Among them, a sliding rod 12 is passed through the inside of the inner handle 2, and a triangular top block 13 is provided at the front end of the sliding rod 12. The front end of the top block 13 extends into the inner hexagonal sleeve 1, and the inner ends of the middle locking block 6 and the outer locking block 8 are rotatably mounted on the tail end of the sliding rod 12. A strip hole 14 is opened on the middle locking block 6 and the outer locking block 8. A mounting rod 15 is passed through the strip hole 14, and the mounting rod 15 is fixedly connected to the inner handle 2. A front top spring 16 is provided between the rear end of the sliding rod 12 and the rear end of the inner handle 2.

[0036] In the initial state, the front top spring 16 makes the slide rod 12 located at the frontmost position in the inner sleeve. At this time, the top block 13 extends into the hexagonal sleeve 1, and the inner locking block and the outer locking block 8 are both in a state where the outer ends are tilted forward. The mounting rod 15 is located at the rear end of the cavity of the strip hole 14, and the outer ends of the inner locking block and the outer locking block 8 are respectively inserted into the inner lock groove and the outer lock groove 7. At this time, the length of the handle part of the wrench is fixed.

[0037] When the hexagon socket 1 is put on the rotating bolt or nut, the top block 13 is squeezed backward and drives the slide bar 12 to move backward to compress the front top spring 16. During this process, the slide bar 12 pulls the inner and outer locking blocks 8 backward, causing the strip hole 14 to move backward outside the mounting rod 15 until the mounting rod 15 is put on the front end of the cavity of the strip hole 14. Then, after the hexagon socket 1 is put on the rotating bolt or nut, the inner and outer locking blocks 8 are separated from the inner and outer locking grooves 7 respectively.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new three-section torque wrench, characterized in that: It comprises an inner hexagonal sleeve (1), an inner handle (2), a middle handle (3), an outer handle (4), a middle locking groove (5), a middle locking block (6), an outer locking groove (7) and an outer locking block (8), wherein: The outer handle (4) is sleeved on the outside of the middle handle (3), and the middle handle (3) is sleeved on the outside of the inner handle (2). The front end of the inner handle (2) extends out of the middle handle (3) and is connected to the side of the hexagonal sleeve (1); The middle locking groove (5) and the outer locking groove (7) are respectively arranged at equal distances on the inner wall surfaces of the middle handle (3) and the outer handle (4), and the middle locking block (6) and the outer locking block (8) are both installed on the inner handle (2); The inner diameter of the outer layer handle (4) is greater than the outer diameter of the middle layer handle (3), the inner diameter of the middle layer handle (3) is greater than the outer diameter of the inner layer handle (2), and the difference between the inner diameter of the outer layer handle (4) and the outer diameter of the middle layer handle (3) is equal to the difference between the inner diameter of the middle layer handle (3) and the outer diameter of the inner layer handle (2); The front end of the outer layer handle (4) is provided with an outer layer ring (9), and the inner surface of the outer layer ring (9) is in contact with the outer surface of the middle layer handle (3). The front end of the middle layer handle (3) is provided with a middle layer ring (10), the cross section of the inner surface of the middle layer ring (10) is a circular surface, and the inner surface of the middle layer ring (10) is in line contact with the surface of the inner layer handle (2); The outer locking block (8) and the inner locking block are both perpendicular to the axial direction of the inner hexagonal sleeve (1), and the outer handle (4) and the middle handle (3) are tilted to one side so that the outer locking groove (7) is covered with the outer end of the outer locking block (8), and the middle locking groove (5) is covered with the outer end of the middle locking block (6).

2. A novel three-section torque wrench according to claim 1, characterized in that: A through slot (11) is provided on the side of the middle layer handle (3), and the outer end of the outer layer locking block (8) passes through the through slot (11).

3. A novel three-section torque wrench according to claim 1, characterized in that: The middle layer locking block (6) is provided on both sides of the outer layer locking block (8), and the outer layer locking groove (7) and the middle layer locking groove (5) are both arranged in an annular structure.

4. A novel three-section torque wrench according to claim 1, characterized in that: The middle locking block (6) and the outer locking block (8) are both arranged at the rear end of the inner handle (2).

5. A novel three-section torque wrench according to claim 1, characterized in that: A slide bar (12) is provided inside the inner handle (2), and a triangular top block (13) is provided at the front end of the slide bar (12). The front end of the top block (13) extends into the inner hexagonal sleeve (1). The inner ends of the middle locking block (6) and the outer locking block (8) are rotatably mounted on the tail end of the slide bar (12). The middle locking block (6) and the outer locking block (8) are both provided with a strip hole (14). A mounting rod (15) is provided in the strip hole (14), and the mounting rod (15) is fixedly connected to the inner handle (2). A front top spring (16) is provided between the rear end of the slide bar (12) and the rear end of the inner handle (2).

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