T-shaped wrench for disassembling CRH2 type motor train unit bottom plate bolt
By designing the rotating sleeve of the T-type wrench to movable connection with the longitudinal rod and the elastic stress plate, the problem of low disassembly and assembly of the bottom plate bolts of the CRH2 type EMU is solved, and efficient disassembly and safety improvement is achieved.
Patent Information
- Application Number
- CN202422217843.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The CRH2 EMU has low disassembly and assembly efficiency. Existing tools such as ratchet wrench are slow. The large swing amplitude of the 12911 wrench sleeve can easily lead to slip wire failure, affecting maintenance costs and safety.
A T-type wrench is designed to achieve height adjustment and stable support through the movable connection between the docking sleeve and the longitudinal rod through the docking sleeve, combining the elastic force plate and the rotating bearing, achieving height adjustment and stable support, adapting to different usage habits, and improving disassembly efficiency.
It improves the efficiency of dismantling the bottom plate bolts of the CRH2 type EMU, reduces slip wire failures, is suitable for different workers, and improves the applicability and safety of the tools.
Smart Images
Figure CN223265558U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of wrenches, and in particular to a T-shaped wrench for removing bottom plate bolts of a CRH2 EMU. Background Art
[0002] In the field of EMU maintenance, the maintenance of CRH2 EMUs is of vital importance. However, there are currently many problems in the process of disassembling and assembling the bottom plate bolts of CRH2 EMUs.
[0003] On the one hand, the CRH2 train's floorplate has a large number of bolts. Especially during the EMU's secondary overhaul, the floorplate disassembly and assembly workload is substantial, and the bolts are frequently removed and installed. This places higher demands on the efficiency and reliability of the disassembly and assembly tools. On the other hand, during on-site operations, the commonly used ratchet wrench, while relatively common, has significant shortcomings. Using a ratchet wrench for disassembly and installation is slow, significantly impacting work progress. Especially in the summer, when filter pack operations are enormous and often take long, the inefficiency of the ratchet wrench becomes a bottleneck in the work process.
[0004] Furthermore, while the 12911 wrench offers certain advantages in speed, it also has serious drawbacks. The large swing of the socket during use can easily lead to bolt stripping, and the fixed height of the socket makes it difficult to adapt to the varying usage habits of workers. Bolt stripping not only increases maintenance costs but also impacts the normal operation and safety of EMU trains. Utility Model Content
[0005] The present application provides a T-type wrench for removing the bottom plate bolts of a CRH2 EMU, so as to solve the problem of low usage efficiency.
[0006] The present application provides a T-type wrench for removing the bottom plate bolts of a CRH2 type EMU, comprising a longitudinal rod (1), a square joint (2) provided at the top of the longitudinal rod (1), a rotating sleeve (13) provided at the bottom end of the longitudinal rod (1), and a docking sleeve (14) provided inside the rotating sleeve (13); the inner wall of the docking sleeve (14) is provided with multiple groups of limiting inner convex strips (15), and the multiple groups of limiting inner convex strips (15) are distributed in an annular manner on the inner wall of the docking sleeve (14); the outer wall of the longitudinal rod (1) is provided with multiple groups of limiting wall sliding grooves (16), and the multiple groups of limiting wall sliding grooves (16) are distributed in an annular manner on the outer wall of the longitudinal rod (1); two groups of rotating bearings (17) are installed at both ends of the rotating sleeve (13), and the two groups of rotating bearings (17) are provided at the inner wall of the rotating sleeve (13). The bearings (17) are symmetrically distributed at both ends of the rotating sleeve (13); the internal movable connection of the rotating bearing (17) is provided with multiple groups of bearing balls (18); the multiple groups of bearing balls (18) are annularly distributed inside the rotating bearing (17); the top of the limiting inner convex strip (15) is fixedly connected with two groups of elastic force-bearing plates (19); the two groups of elastic force-bearing plates (19) are symmetrically distributed on the top of the limiting inner convex strip (15); one end of the elastic force-bearing plate (19) is provided with a snap-fitting protrusion (20); the outer wall of the longitudinal rod (1) is provided with multiple groups of snap-fitting grooves (21); the multiple groups of snap-fitting grooves (21) are linearly distributed on the outer wall of the longitudinal rod (1); the bottom of the longitudinal rod (1) is fixedly connected with a limiting bottom plate (23).
[0007] Preferably, a transverse sleeve rod (3) is provided on the outer side of the longitudinal rod (1), two groups of transverse adjustment rods (4) are movably connected to the outer side of the transverse sleeve rod (3), the two groups of transverse adjustment rods (4) are symmetrically distributed on the outer side of the transverse sleeve rod (3), and a telescopic slot (5) is provided inside the transverse sleeve rod (3).
[0008] Preferably, two groups of embedded tubes (6) are provided on the outer side of the transverse adjustment rod (4), and the two groups of embedded tubes (6) are symmetrically distributed on the outer side of the transverse adjustment rod (4); and two groups of embedded tube sliding grooves (7) are opened on the inner wall of the telescopic slot (5), and the two groups of embedded tube sliding grooves (7) are symmetrically distributed on the inner wall of the telescopic slot (5).
[0009] Preferably, the embedded tube (6) is movably connected to an elastic positioning column (8), and a positioning spring (9) is provided at one end of the elastic positioning column (8).
[0010] Preferably, the outer wall of the transverse sleeve rod (3) is provided with a plurality of groups of positioning wall holes (10), and the plurality of groups of positioning wall holes (10) are linearly distributed on the outer wall of the transverse sleeve rod (3).
[0011] Preferably, one end of the lateral adjustment rod (4) is fixedly connected to a handle block (11), and multiple groups of anti-slip rings (12) are provided on the outside of the handle block (11), and the multiple groups of anti-slip rings (12) are distributed in a ring shape on the outside of the handle block (11).
[0012] Preferably, a rubber outer pad (22) is provided on the outer side of the elastic force-bearing plate (19).
[0013] Beneficial effects:
[0014] Taking into account the problem of low utilization efficiency, the rotating sleeve is moved and adjusted to a comfortable height through the active connection between the docking sleeve and the longitudinal rod in the rotating sleeve, and the two sets of elastic force-bearing plates on the top of the docking sleeve are pressed so that the engaging protrusions on the inner sides of the elastic force-bearing plates are pressed into the corresponding engaging grooves. The height of the docking sleeve is limited by the engaging protrusions, and the docking sleeve limits the rotating sleeve through the connection between the rotating bearing and the rotating sleeve, thereby supporting and stabilizing the wrench, greatly improving the applicability of the wrench, and further greatly improving the disassembly and use efficiency of the device.
[0015] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0017] Figure 1 The utility model is a schematic diagram of the overall structure of a T-type wrench for removing the bottom plate bolts of a CRH2 EMU.
[0018] Figure 2 The utility model is a schematic side view of the structure of a T-type wrench for removing the bottom plate bolts of a CRH2 EMU.
[0019] Figure 3 The utility model is a schematic diagram of the transverse rod structure of a T-type wrench for removing the bottom plate bolts of a CRH2 EMU.
[0020] Figure 4 The utility model is a schematic diagram of the longitudinal rod structure of a T-type wrench for removing the bottom plate bolts of a CRH2 type EMU.
[0021] Description of reference numerals:
[0022] 1. Longitudinal rod; 2. Square joint; 3. Horizontal sleeve rod; 4. Horizontal adjustment rod; 5. Telescopic slot; 6. Embedded tube; 7. Embedded tube slide; 8. Elastic positioning column; 9. Positioning spring; 10. Positioning wall hole; 11. Hand grip; 12. Anti-slip ring; 13. Rotating sleeve; 14. Docking sleeve; 15. Restricting inner convex strip; 16. Restricting wall slide; 17. Rotating bearing; 18. Bearing ball; 19. Elastic force plate; 20. Engaging protrusion; 21. Engaging groove; 22. Rubber outer pad; 23. Restricting bottom plate. DETAILED DESCRIPTION
[0023] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.
[0025] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0026] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.
[0027] In the description of this application, 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, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt, or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.
[0029] The utility model provides Figure 1-4The T-shaped wrench for removing the bottom plate bolts of the CRH2 type EMU shown in the figure comprises a longitudinal rod 1, a square joint 2 is provided at the top of the longitudinal rod 1, a rotating sleeve 13 is provided at the bottom end of the longitudinal rod 1, and a docking sleeve 14 is provided inside the rotating sleeve 13; the inner wall of the docking sleeve 14 is provided with multiple groups of limiting inner convex strips 15, and the multiple groups of limiting inner convex strips 15 are distributed in a ring shape on the inner wall of the docking sleeve 14; the outer wall of the longitudinal rod 1 is provided with multiple groups of limiting wall grooves 16, and the multiple groups of limiting wall grooves 16 are distributed in a ring shape on the outer wall of the longitudinal rod 1; two groups of rotating bearings 17 are installed at both ends of the rotating sleeve 13, and the two groups of rotating bearings 17 are installed at both ends of the rotating sleeve 13. The rotating bearings 17 are symmetrically distributed at both ends of the rotating sleeve 13. The internal movably connected rotating bearings 17 are equipped with multiple sets of bearing balls 18, which are distributed in an annular shape inside the rotating bearings 17. Two sets of elastic force plates 19 are fixedly connected to the top of the limiting inner convex strip 15. The two sets of elastic force plates 19 are symmetrically distributed on the top of the limiting inner convex strip 15. A snap-fitting protrusion 20 is provided at one end of the elastic force plate 19. The outer wall of the longitudinal rod 1 is provided with multiple sets of snap-fitting grooves 21, which are linearly distributed on the outer wall of the longitudinal rod 1. The bottom of the longitudinal rod 1 is fixedly connected to a limiting bottom plate 23.
[0030] Among them, the longitudinal rod 1 is the main rod of the wrench; the rotating sleeve 13 is convenient for the user to hold by using two sets of rotating bearings 17 and the docking of the docking sleeve 14 with the longitudinal rod 1, which does not affect the rotation when removing the bolts. At the same time, the use of multiple sets of bearing balls 18 in the rotating bearings 17 can effectively reduce the friction resistance of the longitudinal rod 1 during rotation, thereby improving the rotation disassembly efficiency; the multiple sets of limiting inner ridges 15 are movably connected with the multiple sets of limiting wall grooves 16, thereby realizing the docking of the docking sleeve 14 with the longitudinal rod 1, and preventing the docking sleeve 14 from slipping; the two sets of elastic force plates 19 can allow the limiting inner ridges 15 to be pressed into the engaging grooves 21 when pressed by force, thereby fixing the position of the rotating sleeve 13 in this way, further realizing the height adjustment of the rotating sleeve 13, so as to adapt to the usage habits of different people, making it more convenient for different people to use the wrench, thereby improving the usage efficiency; the limiting base plate 23 can limit the rotating sleeve 13 to prevent the rotating sleeve 13 from detaching from the longitudinal rod 1.
[0031] A transverse sleeve rod 3 is provided on the outside of the longitudinal rod 1, and two groups of transverse adjustment rods 4 are movably inserted on the outside of the transverse sleeve rod 3. The two groups of transverse adjustment rods 4 are symmetrically distributed on the outside of the transverse sleeve rod 3, and a telescopic slot 5 is opened inside the transverse sleeve rod 3.
[0032] Among them, the transverse sleeve rod 3 is movably connected to the two groups of transverse adjustment rods 4 through the telescopic slot 5, so that the distance between the two groups of transverse adjustment rods 4 can be movably adjusted, and then the space size of the on-site construction environment can be adapted through this adjustment method.
[0033] Two groups of embedded tubes 6 are provided on the outside of the transverse adjustment rod 4, and the two groups of embedded tubes 6 are symmetrically distributed on the outside of the transverse adjustment rod 4. Two groups of embedded tube slide grooves 7 are opened on the inner wall of the telescopic slot 5, and the two groups of embedded tube slide grooves 7 are symmetrically distributed on the inner wall of the telescopic slot 5.
[0034] Among them, the two groups of embedded tubes 6 are accommodated as internal components and can be movably connected with the two groups of embedded tube slide grooves 7, thereby ensuring the stability of the lateral adjustment rod 4 and the lateral sleeve rod 3 during the movably connected adjustment.
[0035] An elastic positioning column 8 is movably connected inside the embedded tube 6 , and a positioning spring 9 is provided at one end of the elastic positioning column 8 .
[0036] The elastic positioning column 8 can freely expand and contract by the rebound force of the positioning spring 9, so that it can be retracted into the embedded tube 6 when compressed, and can be ejected by the rebound force of the spring.
[0037] The outer wall of the transverse sleeve rod 3 is provided with a plurality of positioning wall holes 10 , and the plurality of positioning wall holes 10 are linearly distributed on the outer wall of the transverse sleeve rod 3 .
[0038] Among them, when the multiple groups of positioning wall holes 10 are opened and coincide with the position of the elastic positioning column 8, the elastic positioning column 8 can be allowed to pop out, thereby fixing the position of the lateral adjustment rod 4, and the multiple groups of positioning wall holes 10 can be used to fix the different positions of the lateral adjustment rod 4. At the same time, this fixing method is convenient for users to adjust.
[0039] One end of the transverse adjustment rod 4 is fixedly connected to a handle block 11 , and multiple groups of anti-slip rings 12 are provided on the outside of the handle block 11 . The multiple groups of anti-slip rings 12 are distributed in a ring shape on the outside of the handle block 11 .
[0040] The gripping block 11 is a user's gripping component, which can increase the user's gripping strength and prevent slipping by using the outer anti-slip ring 12 .
[0041] A rubber outer pad 22 is provided on the outer side of the elastic force-bearing plate 19 .
[0042] The rubber outer pad 22 is made of rubber material, which can effectively prevent the user from slipping when pressing, and at the same time improve the comfort during use through its elasticity.
[0043] Working principle: When using the T-type wrench for removing the bottom plate bolts of the CRH2 EMU, the user inserts the square connector 2 vertically into the bolt, and then presses the two sets of elastic positioning columns 8 on the outer side of one end of the transverse adjustment rod 4 into the embedded tube 6 according to the size of the on-site construction environment. The positioning spring 9 behind the elastic positioning column 8 retracts so that the elastic positioning column 8 is inside, so that the transverse adjustment rod 4 can slide freely in the telescopic groove 5 of the transverse sleeve rod 3. After the transverse adjustment rod 4 is extended or contracted to the appropriate length, the user holds the rotating sleeve 13 and moves the rotating sleeve 13 to a comfortable height through the active connection between the docking sleeve 14 in the rotating sleeve 13 and the longitudinal rod 1, and then uses The user presses the two sets of elastic force plates 19 on the top of the docking sleeve 14, so that the locking protrusions 20 on the inner side of the elastic force plates 19 are pressed into the corresponding locking grooves 21. The height of the docking sleeve 14 is limited by the locking protrusions 20, and the docking sleeve 14 limits the rotating sleeve 13 through the connection between the rotating bearing 17 and the rotating sleeve 13, thereby supporting and stabilizing the wrench. Then the user holds the hand block 11 at one end of the transverse adjustment rod 4 with his other hand to rotate the transverse sleeve rod 3, and the transverse sleeve rod 3 drives the square joint 2 on the longitudinal rod 1 to rotate in the rotating bearing 17, thereby realizing the disassembly function of a T-type wrench for disassembling the bottom plate bolts of the CRH2 EMU.
[0044] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A T-type wrench for removing the bottom plate bolts of a CRH2 type EMU, comprising a longitudinal rod (1), characterized in that: The top of the longitudinal rod (1) is provided with a square joint (2), the bottom end of the longitudinal rod (1) is provided with a rotating sleeve (13), and the interior of the rotating sleeve (13) is provided with a docking sleeve (14); The inner wall of the docking sleeve (14) is provided with a plurality of groups of limiting inner convex strips (15), and the plurality of groups of limiting inner convex strips (15) are distributed in an annular manner on the inner wall of the docking sleeve (14); the outer wall of the longitudinal rod (1) is provided with a plurality of groups of limiting wall sliding grooves (16), and the plurality of groups of limiting wall sliding grooves (16) are distributed in an annular manner on the outer wall of the longitudinal rod (1); two groups of rotating bearings (17) are installed at both ends of the rotating sleeve (13), and the two groups of rotating bearings (17) are symmetrically distributed at both ends of the rotating sleeve (13); the internal movable connection of the rotating bearing (17) is provided with a plurality of groups of bearing balls (18), and the plurality of groups of bearing balls (18) are distributed in an annular manner inside the rotating bearing (17); Two groups of elastic force-bearing plates (19) are fixedly connected to the top of the limiting inner convex strip (15), and the two groups of elastic force-bearing plates (19) are symmetrically distributed on the top of the limiting inner convex strip (15). One end of the elastic force-bearing plate (19) is provided with a snap-fitting protrusion (20). The outer wall of the longitudinal rod (1) is provided with multiple groups of snap-fitting grooves (21), and the multiple groups of snap-fitting grooves (21) are linearly distributed on the outer wall of the longitudinal rod (1). The bottom of the longitudinal rod (1) is fixedly connected to a limiting bottom plate (23).
2. A T-type wrench for removing the bottom plate bolts of a CRH2 EMU according to claim 1, characterized in that: A transverse sleeve rod (3) is provided on the outside of the longitudinal rod (1), and two groups of transverse adjustment rods (4) are movably inserted on the outside of the transverse sleeve rod (3). The two groups of transverse adjustment rods (4) are symmetrically distributed on the outside of the transverse sleeve rod (3), and a telescopic slot (5) is provided inside the transverse sleeve rod (3).
3. A T-type wrench for removing the bottom plate bolts of a CRH2 EMU according to claim 2, characterized in that: Two groups of embedded tubes (6) are provided on the outer side of the transverse adjustment rod (4), and the two groups of embedded tubes (6) are symmetrically distributed on the outer side of the transverse adjustment rod (4). Two groups of embedded tube sliding grooves (7) are opened on the inner wall of the telescopic slot (5), and the two groups of embedded tube sliding grooves (7) are symmetrically distributed on the inner wall of the telescopic slot (5).
4. A T-type wrench for removing the bottom plate bolts of a CRH2 EMU according to claim 3, characterized in that: The embedded tube (6) is movably connected to an elastic positioning column (8), and one end of the elastic positioning column (8) is provided with a positioning spring (9).
5. A T-type wrench for removing the bottom plate bolts of a CRH2 EMU according to claim 2, characterized in that: The outer wall of the transverse sleeve rod (3) is provided with a plurality of groups of positioning wall holes (10), and the plurality of groups of positioning wall holes (10) are linearly distributed on the outer wall of the transverse sleeve rod (3).
6. A T-type wrench for removing the bottom plate bolts of a CRH2 EMU according to claim 2, characterized in that: One end of the transverse adjustment rod (4) is fixedly connected to a hand grip block (11), and a plurality of groups of anti-slip rings (12) are provided on the outside of the hand grip block (11). The plurality of groups of anti-slip rings (12) are distributed in a ring shape on the outside of the hand grip block (11).
7. A T-type wrench for removing the bottom plate bolts of a CRH2 EMU according to claim 1, characterized in that: A rubber outer pad (22) is provided on the outer side of the elastic force-bearing plate (19).