A bolt tightening auxiliary device

Abstract

The utility model discloses a kind of bolt tightening auxiliary devices, including base, mounting seat and anti-rotation device, the mounting seat is set on the base by one-way bearing one-way rotation, annular support area for supporting workpiece is equipped on the mounting seat, positioning hole corresponding with bolt hole on workpiece is equipped on the support area;The anti-rotation device includes sleeve and the limiting arm being set at the outside of the sleeve, the sleeve is equipped with the limiting hole for the screw cap of bolt insertion, when the screw cap of bolt insertion the limiting hole, the sleeve is relatively fixed in circumferential direction with screw;The limiting arm is used for abutting the outside of the mounting seat, to resist the torque suffered by the sleeve. The device ingeniously realizes the dual needs of flexible rotation and stable positioning.

Description

Technical Field

[0001] This utility model relates to the technical field of railway vehicle equipment maintenance devices, and in particular to a bolt tightening auxiliary device. Background Technology

[0002] A unit cylinder, also known as a single-unit brake cylinder, is a core component of the braking system in railway vehicles. It primarily functions by clamping the brake disc to achieve braking. The quality of unit cylinder maintenance is crucial for ensuring railway transportation safety and service quality. Because a unit cylinder has numerous bolts (typically 12), maintenance personnel frequently need to adjust their operating position or move the unit cylinder when tightening different bolts, resulting in low operational efficiency. Furthermore, bolt torque often fails to meet maintenance requirements, leading to rework of the unit cylinder, significantly reducing maintenance efficiency and increasing costs. Utility Model Content

[0003] In view of this, the present invention proposes a bolt tightening auxiliary device, which aims to improve the maintenance efficiency of unit cylinders and reduce maintenance costs.

[0004] A bolt tightening auxiliary device, comprising:

[0005] Base;

[0006] The mounting base is rotatably mounted on the base via a one-way bearing. The mounting base has an annular support area for supporting the workpiece, and the support area has positioning holes corresponding to the bolt holes on the workpiece.

[0007] An anti-rotation device includes a sleeve and a limiting arm disposed on the outside of the sleeve. The sleeve is provided with a limiting hole for inserting a bolt nut. When the bolt nut is inserted into the limiting hole, the sleeve and the screw are fixed relative to each other in the circumferential direction. The limiting arm is used to abut against the outside of the mounting base to resist the torque on the sleeve.

[0008] As a further optional solution, the mounting base also includes an identification area located outside the support area, the identification area being outside the coverage area of ​​the workpiece, and the identification area having sequential markings corresponding one-to-one with the positioning holes.

[0009] As a further optional option, the sequence identifier is a numerical number.

[0010] As a further optional solution, the mounting base includes a base body, the top of which is recessed to accommodate a cavity, and an annular support plate is provided on the outer periphery of the base body. The support area and the marking area are located on the top surface of the annular support plate.

[0011] As a further optional solution, the bottom of the base is integrally connected to a mounting cylinder, which is fixedly sleeved with the inner ring of the one-way bearing.

[0012] As a further optional solution, the bottom of the seat is provided with a connecting body, the connecting body including a first shaft segment and a second shaft segment, a positioning step is formed between the first shaft segment and the second shaft segment, the second shaft segment passes through the one-way bearing and is keyed to the inner ring of the one-way bearing; the positioning step abuts against one end of the inner ring of the one-way bearing, and a baffle is bolted to the end of the second shaft segment, the baffle pressing against the other end of the inner ring of the one-way bearing.

[0013] As a further optional solution, the connector and the base are connected by bolts or welding.

[0014] As a further alternative, the diameter of the sleeve is smaller than the diameter of the positioning hole.

[0015] As a further optional solution, the limiting hole is hexagonal in shape.

[0016] Compared with the prior art, the bolt tightening auxiliary device of this application has at least the following advantages:

[0017] The mounting base can be rotatably mounted on the base. When it is necessary to tighten bolts at different positions of the workpiece (unit cylinder), maintenance personnel do not need to frequently adjust their own operating position or move the heavy unit cylinder. They can simply rotate the mounting base to rotate the position of the bolt to be tightened to an easy-to-operate position. This significantly reduces auxiliary actions during operation, effectively improves the continuity and efficiency of bolt tightening operations, and reduces the physical exertion of workers.

[0018] Furthermore, in the reverse direction (non-permissible rotation direction), the mounting base is locked by a one-way bearing and cannot rotate, providing a stable counterforce support foundation for the anti-rotation device. Because the one-way bearing restricts the reverse rotation of the mounting base, making it a fixed fulcrum, the anti-rotation device remains stable, effectively preventing the bolt from rotating synchronously with the nut. This ensures that the torque is fully applied to the threaded pair for precise locking, completely avoiding problems such as insufficient torque or improper installation caused by the bolt rotating with the nut.

[0019] This device ingeniously fulfills the dual requirements of "flexible rotation when adjusting position" and "stable positioning when tightening". Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a bolt tightening auxiliary device according to one embodiment (anti-rotation device not shown).

[0021] Figure 2 This is a cross-sectional schematic diagram of an embodiment of a bolt tightening auxiliary device;

[0022] Figure 3 This is an exploded view of a bolt tightening auxiliary device and a workpiece in one embodiment;

[0023] Figure 4 This is a cross-sectional schematic diagram of another embodiment of a bolt tightening auxiliary device;

[0024] In the diagram: 100, workpiece; 200, bolt;

[0025] 1. Base;

[0026] 2. Mounting base; 21. Base body; 211. Receiving cavity; 22. Annular support plate; 22a. Support area; 22b. Marking area; 221. Positioning hole; 222. Sequence marker; 23. Mounting cylinder; 24. Connector; 241. First shaft section; 242. Second shaft section; 243. Positioning step; 25. Baffle;

[0027] 3. One-way bearing;

[0028] 4. Anti-rotation device; 41. Sleeve; 411. Limiting hole; 42. Limiting arm. Detailed Implementation

[0029] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0034] refer to Figure 1-3 This utility model discloses a bolt tightening auxiliary device, including a base 1, a mounting base 2, and an anti-rotation device 4. The mounting base 2 is unidirectionally rotatable on the base 1 via a one-way bearing 3. The mounting base 2 has an annular support area 22a for supporting the workpiece, and the support area 22a has positioning holes 221 corresponding to the bolt holes on the workpiece. The anti-rotation device 4 includes a sleeve 41 and a limiting arm 42 disposed on the outside of the sleeve 41. The sleeve 41 has a limiting hole 411 for inserting the bolt nut. When the bolt nut is inserted into the limiting hole 411, the sleeve 41 and the bolt are fixed relative to each other in the circumferential direction. The limiting arm 42 is used to abut against the outside of the mounting base 2 to resist the torque on the sleeve 41.

[0035] When applying, such as Figure 2 As shown, the workpiece 100 (such as a unit cylinder) is placed on the mounting base 2, so that the bolt holes on the workpiece correspond to the positioning holes 221 on the mounting base 2. Then, the bolt 200 is inserted from bottom to top into the positioning holes 221 and the bolt holes on the workpiece. The nut of the bolt 200 can pass through the positioning hole 221 of the mounting base 2 but cannot pass through the bolt holes of the workpiece 100. Then, the nut (not shown) is screwed into the bolt above the workpiece 100 to achieve the pre-installation of the bolt. During this process, the mounting base 2 can be rotatably set on the base 1. When installing bolts in different positions, maintenance personnel do not need to frequently adjust their own operating position or move the heavy unit cylinder. They can simply rotate the mounting base 2 to rotate the position of the bolt to be tightened to an easy-to-operate position. This significantly reduces the auxiliary actions during the operation, effectively improves the continuity and efficiency of the bolt tightening operation, and reduces the physical exertion of the workers.

[0036] When tightening nuts or bolts, the anti-rotation device 4 is moved under the bolt to be tightened, and the limiting hole 411 on the sleeve 41 is inserted into the corresponding nut of the bolt. In this embodiment, the bolt is a hexagonal bolt, so the shape of the limiting hole 411 is a hexagonal hole, so that the sleeve 41 and the bolt are relatively fixed in the circumferential direction. At the same time, the limiting arm 42 abuts against the outside of the mounting base 2. When tightening the nut, the bolt tends to rotate with the nut, but because the one-way bearing 3 restricts the mounting base 2 from rotating in the opposite direction, the mounting base 2 becomes a fixed fulcrum. The mounting base 2 provides a stable reaction force support base for the limiting arm 42 of the anti-rotation device 4, so that the anti-rotation device 4 and the bolt remain stable, effectively preventing the bolt from rotating synchronously with the nut, ensuring that the torque is fully applied to the threaded pair to achieve precise locking, and completely avoiding the problem of insufficient torque or improper installation caused by the bolt rotating with the nut.

[0037] The diameter of the sleeve 41 is smaller than the diameter of the positioning hole 221. This allows the sleeve 41 to enter the positioning hole 221, facilitating its connection with the bolt nut.

[0038] It should be noted that the above description uses a unit cylinder as an example workpiece. In fact, this device is also applicable to other workpieces with structures that require tightening multiple bolts. Therefore, it should not be assumed that this device can only be applied to unit cylinders.

[0039] In some embodiments, such as Figure 1 and Figure 2 As shown, the mounting base 2 also includes an identification area 22b located outside the support area 22a. The identification area 22b is located outside the coverage area of ​​the workpiece, and the identification area 22b is provided with sequential identifiers 222 that correspond one-to-one with the positioning holes 221. Specifically, the sequential identifiers 222 are numerical numbers.

[0040] When tightening bolts, it is preferable to install the workpiece symmetrically to improve torque balance; for example, after tightening the first bolt, the second bolt should be a bolt in a symmetrical position. Figure 1 and Figure 2 As shown, by setting the sequence label 222 in the label area 22b, the installation sequence can be intuitively reminded to the maintenance personnel, which helps to avoid missing bolts and is more user-friendly for less experienced maintenance personnel.

[0041] Among them, such as Figure 2 As shown, when the workpiece is placed on the mounting base 2, the workpiece will not obstruct the marking area 22b, making it easy for maintenance personnel to clearly observe the sequence marking 222.

[0042] In some embodiments, such as Figure 2As shown, the mounting base 2 includes a base body 21, the top of the base body 21 is recessed with an accommodating cavity 211, and the outer periphery of the base body 21 is provided with an annular support plate 22. The support area 22a and the marking area 22b are located on the top surface of the annular support plate 22.

[0043] The purpose of the receiving cavity 211 is to avoid interference between the workpiece and the mounting base 2. The receiving cavity 211 can simply be a sufficiently large space to accommodate the non-planar contour protruding on the workpiece; the receiving cavity 211 can also be a structure that matches the protruding contour on the workpiece.

[0044] In some embodiments, such as Figure 2 As shown, a mounting sleeve 23 is integrally connected to the bottom of the base 21, and the mounting sleeve 23 is fixedly sleeved with the inner ring of the one-way bearing 3. The mounting sleeve 23 and the one-way bearing 3 are interference-fitted.

[0045] In other embodiments, such as Figure 4 As shown, the bottom of the base 21 is provided with a connecting body 24, which includes a first shaft segment 241 and a second shaft segment 242. A positioning step 243 is formed between the first shaft segment 241 and the second shaft segment 242. The second shaft segment 242 passes through the one-way bearing 3 and is keyed to the inner ring of the one-way bearing 3. The positioning step 243 abuts against one end of the inner ring of the one-way bearing 3. A baffle 25 is bolted to the end of the second shaft segment 242, and the baffle 25 presses against the other end of the inner ring of the one-way bearing 3. The connecting body 24 is bolted or welded to the base 1.

[0046] In this embodiment, the mounting base 2 is vertically fixed by the connecting body 24 and the baffle 25; the mounting base 2 and the one-way bearing 3 are circumferentially fixed by a key (such as a flat key). In this embodiment, the mounting base 2 can be disassembled by removing the baffle 25, thus allowing the replacement of mounting bases 2 of different sizes to correspond to workpieces (unit cylinders) of different sizes.

[0047] In summary, this application provides a bolt tightening auxiliary device, in which the mounting base 2 is rotatably mounted on the base 1 in one direction. When it is necessary to tighten bolts at different positions of the workpiece (unit cylinder), maintenance personnel do not need to frequently adjust their own operating position or move the heavy unit cylinder. They can simply rotate the mounting base 2 to rotate the position of the bolt to be tightened to a position that is easy to operate. This significantly reduces the auxiliary actions during the operation process, effectively improves the continuity and efficiency of bolt tightening operations, and reduces the physical exertion of the workers.

[0048] Furthermore, in the reverse direction (non-permissible rotation direction), the mounting base 2 is locked by the one-way bearing 3 and cannot rotate, providing a stable counterforce support foundation for the anti-rotation device 4. Because the one-way bearing 3 restricts the reverse rotation of the mounting base 2, making it a fixed fulcrum, the anti-rotation device 4 remains stable, effectively preventing the bolt from rotating synchronously with the nut. This ensures that the torque is fully applied to the threaded pair for precise locking, completely avoiding problems such as insufficient torque or improper installation caused by the bolt rotating with the nut.

[0049] This device ingeniously fulfills the dual requirements of "flexible rotation when adjusting position" and "stable positioning when tightening".

[0050] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A bolt tightening auxiliary device, characterized in that, include: Base; The mounting base is rotatably mounted on the base via a one-way bearing. The mounting base has an annular support area for supporting the workpiece, and the support area has positioning holes corresponding to the bolt holes on the workpiece. An anti-rotation device includes a sleeve and a limiting arm disposed on the outside of the sleeve. The sleeve is provided with a limiting hole for inserting a bolt nut. When the bolt nut is inserted into the limiting hole, the sleeve and the screw are fixed relative to each other in the circumferential direction. The limiting arm is used to abut against the outside of the mounting base to resist the torque on the sleeve.

2. The bolt tightening auxiliary device according to claim 1, characterized in that: The mounting base also includes an identification area located outside the support area. The identification area is located outside the coverage area of ​​the workpiece, and the identification area is provided with sequential markings that correspond one-to-one with the positioning holes.

3. The bolt tightening auxiliary device according to claim 2, characterized in that: The sequence identifier is a numerical number.

4. The bolt tightening auxiliary device according to claim 2 or 3, characterized in that: The mounting base includes a base body, the top of which is recessed to accommodate a cavity, and an annular support plate is provided on the outer periphery of the base body. The support area and the marking area are located on the top surface of the annular support plate.

5. The bolt tightening auxiliary device according to claim 4, characterized in that: The bottom of the base is integrally connected to a mounting cylinder, which is fixedly sleeved with the inner ring of the one-way bearing.

6. The bolt tightening auxiliary device according to claim 4, characterized in that: The bottom of the seat is provided with a connecting body, which includes a first shaft segment and a second shaft segment. A positioning step is formed between the first shaft segment and the second shaft segment. The second shaft segment passes through the one-way bearing and is keyed to the inner ring of the one-way bearing. The positioning step abuts against one end of the inner ring of the one-way bearing. A baffle is bolted to the end of the second shaft segment. The baffle is pressed against the other end of the inner ring of the one-way bearing.

7. The bolt tightening auxiliary device according to claim 6, characterized in that: The connector and the base are connected by bolts or welding.

8. The bolt tightening auxiliary device according to claim 1, characterized in that: The diameter of the sleeve is smaller than the diameter of the positioning hole.

9. The bolt tightening auxiliary device according to claim 1, characterized in that: The limiting hole is hexagonal in shape.

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