Torque wrench structure and key dismounting device

Abstract

The utility model relates to a torque wrench structure and key blocking dismounting equipment, including screwing subassembly and drive assembly, the screwing subassembly includes the rotary connection, nut positioning part and elastic adjusting part, drive assembly and rotary connection transmission connection, nut positioning part is provided with the bolt positioning slot of accommodating key blocking bolt, rotary connection is provided with the guide hole for accommodating nut positioning part, guide hole and nut positioning part sliding connection, the bottom of guide hole and the bottom of nut positioning part set up elastic adjusting part, and elastic adjusting part is used for providing elastic adjusting for nut positioning part. The utility model will torque wrench through the rotary connection and nut sliding fit, in the two part structure sets up elastic adjusting part and carries out self -adaptation adjustment, and the elastic force of elastic adjusting part will always push torque wrench to the nut direction and eliminate axial clearance automatically, and the impact force is buffered and damped in the process of abutting and pushing tightly and screwing process.

Description

Technical Field

[0001] This utility model relates to the field of railway freight car wheelset maintenance technology, specifically to a torque wrench structure and a key removal device. Background Technology

[0002] In freight car components, the stop key is a small wedge-shaped part near the bearing on the bogie. It is installed in the side frame guide frame. When the bogie is under tension, the stop key can be used to connect the side frame to the wheelset to prevent the wheelset from falling off.

[0003] When wheelset maintenance is required, the key bolts need to be loosened and then the key retracted. For a long time, in actual operation, railway vehicle maintenance workshops have needed to first loosen the bolts of the key restrained on the bogie side frame, and then push the key away from the limit position to disengage the key from the wheelset and release the key's restriction on the wheelset.

[0004] In the existing technology, the bolts of the stop key are disassembled by a robotic arm in conjunction with a torque wrench. However, in order to prevent the bolt and nut from coming off the torque wrench during the loosening process, the torque wrench needs to be aligned and tightly engaged with the bolt and nut. However, since the robotic arm cannot adjust the force during the engagement process, the torque wrench and the bolt will be rigidly engaged, resulting in stress concentration. This can easily cause deformation of the bogie or the torque wrench body, affecting its service life. Utility Model Content

[0005] The first aspect of this utility model aims to solve the technical problem of stress concentration in the torque wrench during the loosening process of the nut removal process. It provides a torque wrench structure that, by setting an elastic adjustment element, not only ensures that the torque wrench is always in contact with the bolt, but also avoids stress concentration in the torque wrench during the contact tightening process and the turning process.

[0006] To achieve the above objectives, this utility model provides a torque wrench structure, including a tightening component and a driving component. The tightening component includes a rotary connecting part, a nut positioning part, and an elastic adjusting component. The driving component and the rotary connecting part are connected in a transmission manner. The nut positioning part has a bolt positioning groove for accommodating a key bolt. The rotary connecting part has a guide hole for accommodating the nut positioning part. The guide hole and the nut positioning part are slidably connected. An elastic adjusting component is provided between the bottom of the guide hole and the bottom of the nut positioning part, providing elastic adjustment for the nut positioning part. This design constructs a torque wrench by axially slidingly engaging the rotary connecting part and the nut positioning part. An elastic adjusting component is provided in these two parts for adaptive adjustment. The elastic force of the elastic adjusting component always keeps the torque wrench pressed against the nut, automatically eliminating axial clearance. Simultaneously, the bolt positioning groove of the torque wrench fits tightly against the nut and the rotary connecting part, buffering and damping some of the impact force during the contact tightening and turning processes.

[0007] Preferably, the inner wall of the guide hole of the rotary connector is provided with a guide groove along the axial direction, and the outer wall of the nut positioning part is provided with a guide protrusion along the axial direction, with the guide groove accommodating the guide protrusion. Through the engaging engagement of the guide protrusion and the guide groove, the rotary connector can drive the nut positioning part to rotate synchronously when rotating.

[0008] Preferably, the width of the guide groove is greater than the width of the guide ridge, and a buffer gap is formed between the guide groove and the guide ridge. In the torque wrench, the rotational transmission and the key bolt are rigidly coupled, and the impact load is directly transmitted through the guide ridge and guide groove, causing localized overload of the rotating connection. This solution provides a buffer space for torque fluctuations through the buffer gap, allowing the impact energy to be released through the buffer gap and reducing damage to the torque wrench.

[0009] Preferably, the elastic adjusting member is a compression spring, and the two ends of the elastic adjusting member are connected to the bottom of the guide hole and the bottom of the nut positioning part, respectively.

[0010] Preferably, the bolt positioning groove includes a nut hole and a screw through hole located at the lower end of the nut hole. The nut hole fits with the outer contour of the nut, and the screw through hole is used to accommodate the screw. The nut hole and the bolt / nut fit together to form a rotational constraint, which can drive the nut to rotate synchronously. Furthermore, the screw through hole at the bottom of the bolt positioning groove can prevent the screw from interfering with the tightening movement.

[0011] The second aspect of this invention aims to solve the technical problem of excessive weight in torque wrenches. Further, the drive assembly includes a mounting base and a drive motor, a drive sprocket, a chain, and a driven sprocket mounted on the mounting base. The drive motor is coaxially connected to the drive sprocket, the chain is drive-driven to the drive and driven sprockets, and the driven chain is coaxially connected to the rotating connection part. Because the disassembly position of the disassembly device is too low, a distance needs to be maintained between the drive motor and the tightening assembly for clearance. This solution uses sprocket drive, which can meet the requirements of long-distance transmission, is lightweight, and has a flexible structure. In addition, the chain is composed of multiple links hinged by pins, possessing a certain degree of elasticity and buffering capacity. When subjected to impact loads, it can absorb some of the impact energy through slight deformation of the chain links, reducing damage to the drive assembly.

[0012] Preferably, it also includes a reaction arm, which is installed outside the rotating connection. When the torque wrench tightens the bolt, one end of the reaction arm acts on the bogie or wheelset, causing the reaction arm to abut against the fixed support position. When the torque wrench begins to apply tightening torque, the reaction torque is transmitted to the fixed support position through the reaction arm, thus preventing the reaction force from being transmitted to the operating robot arm.

[0013] A key removal device includes a torque wrench structure.

[0014] Preferably, it also includes a key-pushing mechanism and a robotic arm connection, which are connected to a torque wrench structure. After the torque wrench structure loosens the bolt, the key-pushing mechanism allows the key to retract, disengaging the bogie from the wheelset. The robotic arm connection connects to a robotic arm that drives the disassembly equipment to move with multiple degrees of freedom.

[0015] The beneficial effects of this utility model are as follows: the torque wrench is constructed by axial sliding cooperation of two parts, a rotating connecting part and a nut positioning part, and an elastic adjustment component is set in these two parts for adaptive adjustment. The elastic force of the elastic adjustment component will always press the torque wrench towards the nut, automatically eliminating axial clearance and ensuring that the bolt positioning groove of the torque wrench is tightly fitted with the nut and the rotating connecting part; the elastic adjustment component can also absorb part of the impact force during the tightening process for buffering and shock absorption, and by setting the elastic adjustment component, an upward lifting force can be applied to the loosened nut, so that the bolt automatically disengages from the limit position of the stop key, making it convenient for the stop key to be retracted. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the torque wrench structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the torque wrench structure of this utility model.

[0018] Figure 3 This is a partial enlarged view of the torque wrench structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the key disassembly device of this utility model.

[0020] The reference numerals in the attached drawings include: 1. Tightening assembly; 11. Rotary connection; 111. Guide hole; 112. Guide groove; 12. Nut positioning part; 121. Bolt positioning groove; 122. Guide protrusion; 13. Elastic adjustment element; 2. Drive assembly; 21. Mounting base; 22. Drive motor; 23. Drive sprocket; 24. Chain; 25. Driven sprocket; 3. Reaction arm; 4. Key push mechanism; 5. Robot arm connection part. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0022] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" are defined based on the contours of the corresponding components. Terms such as "first" and "second" used in this disclosure are for distinguishing one element from another and do not imply sequence or importance.

[0023] Example 1

[0024] like Figures 1-3 As shown, this embodiment provides a torque wrench structure, including a tightening assembly 1 and a driving assembly 2. The tightening assembly 1 includes a rotary connecting part 11, a nut positioning part 12, and an elastic adjusting member 13. The driving assembly 2 and the rotary connecting part 11 are connected in a transmission manner. The nut positioning part 12 has a bolt positioning groove 121 for accommodating a key bolt. The rotary connecting part 11 has a guide hole 111 for accommodating the nut positioning part 12. The guide hole 111 and the nut positioning part 12 are slidably connected. An elastic adjusting member 13 is provided between the bottom of the guide hole 111 and the bottom of the nut positioning part 12. The elastic adjusting member 13 is used to provide elastic adjustment for the nut positioning part 12.

[0025] The torque wrench is constructed by axially slidingly engaging two parts: a rotating connecting part 11 and a nut positioning part 12. An elastic adjusting element 13 is provided in these two parts for adaptive adjustment. The elastic force of the elastic adjusting element 13 will always press the torque wrench towards the nut, automatically eliminating axial clearance. At the same time, the bolt positioning groove 121 of the torque wrench is tightly fitted with the nut and the rotating connecting part 11, buffering and damping some of the impact force during the contact tightening process and the turning process.

[0026] Furthermore, by setting the elastic adjustment element 13, an upward lifting force can be applied to the loosened nut, so that the bolt automatically disengages from the limit position of the stop key, making it convenient for the stop key to be retracted.

[0027] The inner wall of the guide hole 111 of the rotary connecting part 11 is provided with a guide groove 112 along the axial direction, and the outer wall of the nut positioning part 12 is provided with a guide protrusion 122 along the axial direction. The guide groove 112 accommodates the guide protrusion 122. Through the engagement between the guide protrusion 122 and the guide groove 112, the rotary connecting part 11 can drive the nut positioning part 12 to rotate synchronously when it rotates.

[0028] The width of the guide groove 112 is greater than the width of the guide rib 122, forming a buffer gap between the guide groove 112 and the guide rib 122. The torque wrench has a rigid fit with the key bolt during rotational transmission, and impact loads are directly transmitted through the guide rib 122 and the guide groove 112, causing localized overload of the rotating connection 11. This design provides a buffer space for torque fluctuations through the buffer gap, allowing impact energy to be released and reducing damage to the torque wrench.

[0029] The elastic adjusting member 13 is a compression spring, and its two ends are connected to the bottom of the guide hole 111 and the bottom of the nut positioning part 12, respectively.

[0030] The bolt positioning groove 121 includes a nut hole and a screw through hole located at the lower end of the nut hole. The nut hole mates with the outer contour of the nut, and the screw through hole is used to accommodate the screw. The nut hole and the bolt / nut fit together to form a rotational constraint, which can drive the nut to rotate synchronously. Furthermore, the bottom of the bolt positioning groove 121 is provided with a screw through hole to accommodate the screw, which can prevent the screw from interfering with the tightening movement.

[0031] In order to limit the adjustment range of the nut positioning part 12 within the rotary connection part 11 and to prevent the nut positioning part 12 from disengaging from the rotary connection part, such as Figures 1-2 As shown, in this embodiment, a pin hole is provided on the side wall at the bottom of the nut positioning part 12, such as... Figure 2 As shown; the outer wall of the rotating connection part 11 is provided with positioning strip holes along the axial direction, such as Figure 1 As shown; when one end of the pin is inserted into the pin hole and the other end of the pin extends into the positioning strip hole, the nut positioning part 11 can constrain the nut positioning part in the axial lifting and lowering adjustment range under the cooperation of the pin and the positioning strip hole; and the height of the positioning strip hole on the outer wall of the rotating connection part 11 is related to the initial preload of the elastic adjustment member 13.

[0032] Example 2

[0033] Based on Example 1, such as Figure 2 As shown, the drive assembly 2 in this embodiment includes a mounting base 21 and a drive motor 22, a drive sprocket 23, a chain 24 and a driven sprocket 25 mounted on the mounting base 21. The drive motor 22 is coaxially connected to the drive sprocket 23, the chain 24 is drive-connected to the drive sprocket 23 and the driven sprocket 25, and the driven chain is coaxially connected to the rotating connection part 11.

[0034] Because the disassembly position of the disassembly device is too low, a distance needs to be left between the drive motor 22 and the twisting component 1 for avoidance. This solution uses sprocket drive, which can meet the transmission requirements over long distances. It is lightweight and has a flexible structure. In addition, the chain 24 is made up of multiple chain links hinged by pins. It has a certain elasticity and buffering capacity. When subjected to impact loads, it can absorb some impact energy through the slight deformation of the chain links, reducing damage to the drive component 2.

[0035] Preferably, it also includes a reaction arm 3, which is installed outside the rotary connection 11. When the torque wrench tightens the bolt, one end of the reaction arm 3 acts on the bogie or wheelset, causing the reaction arm 3 to abut against the fixed support position. When the torque wrench begins to apply tightening torque, the reaction torque is transmitted to the fixed support position through the reaction arm 3, thus preventing the reaction force from being transmitted to the operating robot arm.

[0036] like Figure 4 As shown, this embodiment provides a key removal device, including a torque wrench structure. It also includes a key pushing mechanism 4 and a robotic arm connecting part 5. The key pushing mechanism 4 and the robotic arm connecting part 5 are connected to the torque wrench structure.

[0037] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A torque wrench structure, characterized in that: The assembly includes a screwing component (1) and a drive component (2). The screwing component (1) includes a rotary connecting part (11), a nut positioning part (12), and an elastic adjusting member (13). The drive component (2) and the rotary connecting part (11) are connected in a transmission manner. The nut positioning part (12) has a bolt positioning groove (121) for accommodating a key bolt. The rotary connecting part (11) has a guide hole (111) for accommodating the nut positioning part (12). The guide hole (111) and the nut positioning part (12) are slidably connected. An elastic adjusting member (13) is provided between the bottom of the guide hole (111) and the bottom of the nut positioning part (12). The elastic adjusting member (13) is used to provide elastic adjustment for the nut positioning part (12).

2. The torque wrench structure according to claim 1, characterized in that: The guide hole (111) of the rotary connection part (11) has a guide groove (112) on the inner wall along the axial direction, and the nut positioning part (12) has a guide protrusion (122) on the outer wall along the axial direction. The guide groove (112) accommodates the guide protrusion (122).

3. The torque wrench structure according to claim 2, characterized in that: The width of the guide groove (112) is greater than the width of the guide protrusion (122), and a buffer gap is formed between the guide groove (112) and the guide protrusion (122).

4. The torque wrench structure according to claim 1, characterized in that: The elastic adjusting member (13) is a compression spring, and the two ends of the elastic adjusting member (13) are connected to the bottom of the guide hole (111) and the bottom of the nut positioning part (12), respectively.

5. The torque wrench structure according to claim 1, characterized in that: The bolt positioning groove (121) includes a nut hole and a screw through hole located at the lower end of the nut hole. The nut hole fits with the outer contour of the nut, and the screw through hole is used to accommodate the screw.

6. The torque wrench structure according to claim 1, characterized in that: The drive assembly (2) includes a mounting base (21) and a drive motor (22), a drive sprocket (23), a chain (24) and a driven sprocket (25) mounted on the mounting base (21). The drive motor (22) is coaxially connected to the drive sprocket (23), the chain (24) is drive-connected to the drive sprocket (23) and the driven sprocket (25), and the driven chain is coaxially connected to the rotating connection part (11).

7. The torque wrench structure according to claim 1, characterized in that: It also includes a reaction arm (3), which is installed outside the rotary connection (11).

8. A device for disassembling a key, characterized in that: Includes the torque wrench structure as described in any one of claims 1-7.

9. A key disassembly device according to claim 8, characterized in that: It also includes a key push mechanism (4) and a robot arm connection part (5), and the key push mechanism (4) and the robot arm connection part (5) are connected to a torque wrench structure.

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