Bolt torque verification device for windscreen wiper arm of motor train unit

Abstract

The utility model discloses a motor train unit wiper arm bolt torque verification device which is characterized in that the motor train unit wiper arm bolt torque verification device comprises a torque, a connecting piece and a screwing head, one end of the torque is provided with a connecting opening, one end of the connecting piece is inserted into the connecting opening and is detachably and fixedly connected with the torque, the other end of the connecting piece is fixedly connected with the screwing head, and the screwing head is fixedly connected with the connecting opening. A first center hole and a second center hole with opposite opening directions are formed in the two ends of the screwing head correspondingly, the radial section of the first center hole and the radial section of the second center hole are both in a regular hexagon shape, and the size of the first center hole is smaller than that of the second center hole. The torque is perpendicular to the axial center line of the first center hole and the axial center line of the second center hole. When in use, the first center hole or the second center hole is sleeved on the head of a bolt to be verified, verification operation can be effectively and quickly carried out in limited positions between a wiper arm and a vehicle body and between wiper arms, and the torque verification device has the effect of improving the torque verification operation efficiency of the bolt of the motor wiper arm of the motor train unit.

Description

Technical Field

[0001] This utility model belongs to the field of EMU maintenance and repair, specifically relating to a device for testing the torque of the wiper arm bolts of EMUs. Background Technology

[0002] Currently, the CRH6A EMU has two windshield wipers and four wiper arms, located in the two lead cars. When the wiper system is inspected in the maintenance depot, it requires climbing a 3-meter ladder to install a 50mm high hex socket into the wiper arm mounting bolts. The socket is then combined with the hex socket using torque testing, resulting in a combined height of 72mm. Since the distance between the two wiper arms is 50.5mm and the gap between the wiper arms and the EMU body is 65mm, the currently available torque testing tools cannot be used perfectly parallel, resulting in tilting and making it extremely easy for bolts to strip, thus preventing the operation from being completed. When bolts strip, the entire wiper system needs to be disassembled to replace the wiper arm mounting bolts, which takes approximately 3 hours, resulting in a long processing time and low torque testing efficiency.

[0003] Therefore, a new technology is needed to solve the problem of low efficiency in the torque verification of the installation bolts for the rain wiper arms of high-speed trains in the existing technology. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a device for verifying the torque of wiper arm bolts on high-speed trains. This device can effectively and quickly perform verification operations within limited positions between the wiper arm and the train body, and between wiper arms, thereby improving the efficiency of verifying the torque of wiper arm bolts on high-speed trains.

[0005] The present invention adopts the following technical solution:

[0006] A torque verification device for wiper arm bolts on high-speed trains includes a torque unit, a connector, and a screw-tightening head. One end of the torque unit has a connection opening, and one end of the connector is inserted into the connection opening and detachably fixedly connected to the torque unit. The other end of the connector is fixedly connected to the screw-tightening head. The screw-tightening head has a first center hole and a second center hole with opposite opening orientations at both ends. The radial cross-section of the first center hole and the second center hole is a regular hexagon. The size of the first center hole is smaller than the size of the second center hole. The torque unit is perpendicular to the axial center lines of the first center hole and the second center hole.

[0007] As a further improvement to the technical solution of this utility model, the two ends of the screwing head are respectively provided with a first section and a second section, the first center hole is provided on the first section, the second center hole is provided on the second section, and the outer peripheral dimension of the second section in the direction perpendicular to the center line is greater than the outer peripheral dimension of the first section.

[0008] As a further improvement to the technical solution of this utility model, the first segment and the second segment are fixedly connected to form the screwing head, and the connecting member is fixedly connected to the second segment.

[0009] As a further improvement to the technical solution of this utility model, the cross-sections of the first segment and the second segment in the direction perpendicular to the center line are both regular hexagonal.

[0010] As a further improvement to the technical solution of this utility model, the wall thickness of the first central hole and the second central hole are equal.

[0011] As a further improvement to the technical solution of this utility model, the sum of the lengths of the first segment and the second segment is no greater than 40 mm.

[0012] As a further improvement to the technical solution of this utility model, the end of the connector away from the screw head is provided with a connecting post, the connecting post is perpendicular to the center line, one end of the torque is provided with a handle, and the other end face is provided with a connecting hole, the opening of the connecting hole forms the connecting opening, and the connecting post can be detachably inserted into the connecting hole.

[0013] As a further improvement to the technical solution of this utility model, it also includes a fixing member, one end of which passes through the torque side and extends into the connecting hole to be detachably and fixedly connected to the connecting post.

[0014] As a further improvement to the technical solution of this utility model, the side of the torque is provided with an insertion hole that communicates with the connecting hole, and the connecting post is provided with a fixing hole corresponding to the insertion hole. One end of the fixing member passes through the insertion hole and extends into the fixing hole to be detachably fixedly connected to the connecting post, and the other end protrudes out of the outside of the torque.

[0015] As a further improvement to the technical solution of this utility model, the cross-section of the connecting column is adapted to the cross-section of the connecting hole and both are quadrilateral.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In use, the tightening head is parallel to the mounting bolt, and the first or second center hole is placed on the head of the bolt to be checked. Then, the bolt is tightened by applying torque to check the torque. This method can effectively and quickly perform checks within the limited positions between the wiper arm and the car body, and between wiper arms. The torque checking device for wiper arm bolts of EMU trains has a simple structure, is easy to use, can shorten maintenance time, reduce labor costs, and improve the efficiency of torque checking of wiper arm bolts of EMU trains. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 This is an exploded view of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the screw head and the connector.

[0021] Figure label:

[0022] 1-Torque; 11-Handle; 12-Connecting hole; 13-Socket;

[0023] 2-Connector; 21-Connecting post; 211-Fixing hole;

[0024] 3-Screwing head; 31-First section; 311-First center hole;

[0025] 4-Factors. Detailed Implementation

[0026] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0027] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0028] Reference Figures 1 to 2A torque verification device for wiper arm bolts on high-speed trains includes a torque 1, a connecting member 2, and a tightening head 3. The length of the torque 1 can be selected according to the actual use. One end of the torque 1 has a connection opening. One end of the connecting member 2 is inserted into the connection opening and detachably fixed to the torque 1. The other end is fixedly connected to the tightening head 3 by welding. The two ends of the tightening head 3 have a first center hole 311 and a second center hole with opposite opening orientations. The radial cross-section of the first center hole 311 and the second center hole is a regular hexagon. The size of the first center hole 311 is smaller than the size of the second center hole. The torque 1 is perpendicular to the axial center lines of the first center hole 311 and the second center hole. Torque 1 is an open-type torque 1. The first center hole 311 and the second center hole can be adapted to bolt heads of different sizes. In use, the tightening head 3 is parallel to the mounting bolt, the first center hole 311 or the second center hole is placed on the bolt head to be checked, and then the torque 1 is applied to tighten the bolt for verification. It can effectively and quickly perform verification work in the limited positions between the wiper arm and the car body, and between wiper arms. The torque verification device for wiper arm bolts of EMU trains has a simple structure, is easy to use, can shorten maintenance time, reduce labor costs, and improve the efficiency of torque verification work for EMU wiper arm bolts. Among them, the first center hole 311 and the second center hole are both internal hexagonal holes. The first center hole 311 can be used to tighten M6 wiper arm bolts, and the second center hole can be used to tighten M8 wiper arm bolts. The tightening head 3 is parallel to the mounting bolt, which can reduce the risk of bolt stripping.

[0029] Using conventional tools, it takes 60 minutes for two people to complete the torque verification of a set of trains. However, using the torque verification device for the wiper arm bolts of this solution, it only takes 10 minutes for two people to complete the torque verification of a set of trains, saving 50 minutes of working time. This greatly reduces the verification time, effectively improves verification efficiency, and reduces labor costs.

[0030] Specifically, the two ends of the screw head 3 have a first section 31 and a second section, respectively. The first center hole 311 is disposed on the first section 31, and the second center hole is disposed on the second section. The outer perimeter of the cross section of the second section perpendicular to the center line is larger than the outer perimeter of the cross section of the first section 31, which makes it easier to distinguish the positions of the first center hole 311 and the second center hole, and makes it easier to fit the first center hole 311 or the second center hole onto the head of the bolt to be checked.

[0031] Specifically, the first segment 31 and the second segment are fixedly connected to form the screw head 3, and the connector 2 is fixedly connected to the second segment. The sum of the lengths of the first segment 31 and the second segment is not greater than 40 mm. The sum of the lengths of the first segment 31 and the second segment is preferably 30 mm. The smaller sum of the lengths of the first segment 31 and the second segment is suitable for EMUs with different gaps between the wiper arm and the car body, avoiding wear between the wiper arm and the car body surface. Its structure does not interfere with the EMU components, achieving the effect of quickly verifying the torque 1 of the wiper arm bolt. For the CRH6A EMU, due to the manufacturing process of the car body, the gap between the wiper arm and the car body is usually 65mm, and the gap between wiper arms is 50.5mm. The height of the commonly used knob fixture is generally around 72mm, which is much larger than the above-mentioned gap dimensions of the train set. However, the sum of the lengths of the first section 31 and the second section of the wiper arm bolt torque verification device in this solution is much smaller than the size between the wiper arm and the car body, and it can effectively meet the needs of different sized installation bolts. Within the limited operating conditions, it can ensure the quality of the verification operation.

[0032] Specifically, the first segment 31 and the second segment both have a regular hexagonal cross-section perpendicular to the centerline, and the wall thickness of the first center hole 311 and the second center hole are equal. The first center hole 311 and the second center hole are interconnected for ease of casting.

[0033] Specifically, the connector 2 has a connecting post 21 protruding from one end away from the screw head 3. The connecting post 21 is perpendicular to the center line. One end of the torque 1 has a handle part 11, and the other end face has a connecting hole 12. The connecting hole 12 is a countersunk hole. The opening of the connecting hole 12 forms the connecting opening, and the connecting post 21 can be inserted into the connecting hole 12.

[0034] Specifically, the device for verifying the torque of the wiper arm bolts on high-speed trains in this solution also includes a fixing member 4. One end of the fixing member 4 passes through the side of the torque 1 and extends into the connecting hole 12 to be detachably and fixedly connected to the connecting column 21, thereby fixing the connecting column 21 to the torque 1. In this case, the fixing member 4 can preferably be a bolt or screw, which fixes the connecting column 21 to the torque 1 together by a threaded connection, making it easy to disassemble and assemble.

[0035] Specifically, the torque 1 has a socket 13 on its side that communicates with the connecting hole 12. The socket 13 can be a threaded hole to facilitate a threaded connection with the fixing member 4. The connecting post 21 has a fixing hole 211 corresponding to the socket. One end of the fixing member 4 passes through the socket 13 and extends into the fixing hole 211 to be detachably fixed to the connecting post 21, while the other end protrudes outward from the torque 1. The cross-section of the connecting post 21 matches the cross-section of the connecting hole 12 and is quadrilateral, which can limit the shaking of the connecting post 21 within the connecting hole 12. The cross-section of the connecting post 21 and the cross-section of the connecting hole 12 are preferably rectangular. The connection structure between the connecting member 2 and the torque 1 is relatively stable, making it less likely that the tool will fall into the wiper fluid drain and become stuck, thus clogging the drain.

[0036] Specifically, connector 2 can be made of M8 10mm thick and 41mm long. The 10mm thick 10mm long ...

[0037] Specifically, depending on the actual use, the fastener 4 can also be configured such that one end is elastically connected to the connecting post 21. That is, one end of the fastener 4 is inserted into the fixing hole 211 on the connecting post 21 and elastically connected to the connecting post 21 within the fixing hole 211. A conventional elastic connection structure can be used within the fixing hole 211 to elastically connect the connecting post 21 and the fastener 4. The length of the fastener 4 is less than the depth of the fixing hole 211. In use, pressing the fastener 4 into the connecting hole 12 or the fixing hole 211 will pull the connecting post 21 out of or into the connecting hole 12. Afterward, the connecting post 2 and the torque 1 can be disassembled and reassembled. When the fastener 4 is released after pressing, the elastic connection structure can drive one end of the fastener 4 to extend out of the fixing hole 211, and when the fixing hole 211 is aligned with the insertion hole 13, it will pass through the insertion hole 13 and extend out of the insertion hole 13.

[0038] Other aspects of the device for verifying the torque of the wiper arm bolts on high-speed trains described in this utility model are found in the prior art and will not be repeated here.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A device for verifying the torque of wiper arm bolts on high-speed trains, characterized in that: The device includes a torque, a connector, and a screw head. One end of the torque has a connection opening. One end of the connector is inserted into the connection opening and detachably fixed to the torque. The other end is fixedly connected to the screw head. The screw head has a first center hole and a second center hole with opposite opening directions at both ends. The radial cross-section of the first center hole and the second center hole is a regular hexagon. The size of the first center hole is smaller than the size of the second center hole. The torque is perpendicular to the axial center line of the first center hole and the second center hole.

2. The device for verifying the torque of wiper arm bolts on high-speed trains according to claim 1, characterized in that: The screw head has a first section and a second section at its two ends, respectively. The first center hole is disposed on the first section, and the second center hole is disposed on the second section. The outer circumferential dimension of the second section in the direction perpendicular to the center line is larger than the outer circumferential dimension of the first section.

3. The device for verifying the torque of wiper arm bolts on high-speed trains according to claim 2, characterized in that: The first segment and the second segment are fixedly connected to form the screw head, and the connector is fixedly connected to the second segment.

4. The device for verifying the torque of wiper arm bolts on high-speed trains according to claim 3, characterized in that: Both the first segment and the second segment have a regular hexagonal cross-section perpendicular to the center line.

5. The device for verifying the torque of wiper arm bolts on high-speed trains according to claim 4, characterized in that: The wall thickness of the first central hole and the second central hole are equal.

6. The device for verifying the torque of windshield wiper arm bolts on high-speed trains according to claim 5, characterized in that: The sum of the lengths of the first segment and the second segment is no greater than 40 mm.

7. The device for verifying the torque of wiper arm bolts on high-speed trains according to claim 1, characterized in that: The connector has a connecting post protruding from one end away from the screw head. The connecting post is perpendicular to the center line. One end of the torque has a handle, and the other end has a connecting hole. The opening of the connecting hole forms the connecting opening, and the connecting post can be detachably inserted into the connecting hole.

8. The device for verifying the torque of wiper arm bolts on high-speed trains according to claim 7, characterized in that: It also includes a fastener, one end of which passes through the torque side and extends into the connection hole to be detachably and fixedly connected to the connection post.

9. The device for verifying the torque of wiper arm bolts on high-speed trains according to claim 8, characterized in that: The torque has a socket on its side that communicates with the connecting hole, and the connecting post has a fixing hole corresponding to the socket. One end of the fixing member passes through the socket and extends into the fixing member to be detachably fixed to the connecting post, while the other end protrudes out of the torque.

10. The device for verifying the torque of wiper arm bolts on high-speed trains according to claim 9, characterized in that: The cross-section of the connecting column is adapted to the cross-section of the connecting hole and both are quadrilateral.

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