A bolt extractor with a relay drawing function

Abstract

The application discloses a bolt puller with relay pulling function, comprising a pulling sleeve and a pushing sleeve, wherein one end of the pulling sleeve is connected with an external driver along the axial direction of the pulling sleeve, and the other end of the pulling sleeve is provided with a plurality of axial thrust plates matched with bolts to be pulled; the pushing sleeve is slidably sleeved on the pulling sleeve, and the pushing sleeve is connected with a telescopic shaft of the external driver; compared with the prior art, the application splits a long pulling stroke into a plurality of pulling sections through the arrangement of the plurality of axial thrust plates, and then realizes the pulling-out operation of long bolts through relay pulling of the plurality of axial thrust plates, fundamentally solves the defects that the nail puller has a short stroke and cannot be applied to long bolt pulling, simultaneously realizes automatic pulling operation, reduces the demand for manual operation as much as possible, improves the pulling efficiency, and reduces the pulling difficulty of the bolts.

Description

Technical Field

[0001] This application relates to the field of rail transit equipment technology, specifically to a bolt puller with a relay pulling function. Background Technology

[0002] Rail transit is an important mode of transportation. Since the length of the rails is fixed, during the laying process, adjacent rails are generally connected by clamps, and connecting bolts are installed between the clamps and the rails. In routine maintenance, bolts are usually removed by manual knocking or by using a bolt puller. Manual knocking is inefficient, and the bolt puller in the current technology has a limited stroke due to structural limitations. Since the bolt needs to penetrate the rail and the clamps on both sides, the length of the bolt is generally greater than the maximum stroke of the bolt puller. As a result, only half of the bolt length can be pulled out by the bolt puller, and the remaining length must be pulled out manually, which is quite difficult. Utility Model Content

[0003] The main purpose of this application is to provide a bolt puller with a relay pulling function, which aims to solve the problem of high pulling difficulty in the prior art.

[0004] This application achieves the above objectives through the following technical solutions:

[0005] A bolt puller with a relay pulling function includes:

[0006] A pulling sleeve, along the axial direction of the pulling sleeve, one end of the pulling sleeve is connected to an external driver, and the other end is provided with several axial thrust plates adapted to the bolt to be pulled.

[0007] A push sleeve is slidably mounted on the pull sleeve, and the push sleeve is connected to the telescopic shaft of an external driver.

[0008] Optionally, the pull sleeve includes a pull sleeve and a connecting sleeve connected by threads, wherein the connecting sleeve is connected to the housing of the external driver; the push sleeve is slidably fitted onto the pull sleeve; and a reset module is also provided inside the connecting sleeve.

[0009] Optionally, the reset module includes a reset spring, one end of which abuts against the pull-out sleeve, and the other end of which abuts against the telescopic shaft of the external driver.

[0010] Optionally, along the radial direction of the drawing sleeve, the top and bottom ends of the drawing sleeve are provided with mutually opposing sliding grooves, and a driving block is slidably disposed inside the drawing sleeve. The driving block is connected to the telescopic shaft of an external driver, and the top and bottom of the driving block pass through the two sliding grooves respectively and are connected to the push sleeve.

[0011] Optionally, the drive block is provided with a stepped hole, and a connecting screw is inserted into the stepped hole. The connecting screw is threadedly connected to the telescopic shaft of the external driver.

[0012] Optionally, each axial thrust plate is provided with a connector for engaging the pull-out bolt, and the connector is V-shaped.

[0013] Optionally, each axial thrust plate is provided with a connection port, and an adjusting block is inserted into the connection port. The adjusting block is provided with a plug interface for locking the pull-out bolt, and the plug interface is arranged in a V-shape.

[0014] Optionally, a snap-fit ​​groove is provided on the outer peripheral surface of the adjusting block, and the axial thrust plate is inserted into the insertion interface.

[0015] Optionally, the top of the pull-out sleeve and the top of the push sleeve are both open along the radial direction to allow for quick assembly and disassembly of the bolt to be pulled out in the radial direction.

[0016] Optionally, the bolt puller may also include a pad having a insertion hole adapted to the bolt to be pulled out.

[0017] Compared with the prior art, this application has the following beneficial effects:

[0018] This application includes a pull sleeve and a push sleeve. Along the axial direction of the pull sleeve, one end of the pull sleeve is connected to an external driver, and the other end is provided with several axial thrust plates adapted to the bolt to be pulled. The push sleeve is slidably sleeved on the pull sleeve, and the push sleeve is connected to the telescopic shaft of the external driver.

[0019] In use, the nut of the bolt to be pulled out is first pulled out by manual tapping. Then, the exposed nut is inserted into the pulling sleeve. At the same time, the nut and the first-stage axial thrust plate are in contact with each other along the pulling direction. Meanwhile, the free end of the push sleeve abuts against the side of the track. Driven by the external driver, the push sleeve moves to one side of the track. However, due to the limiting effect of the track, the pulling sleeve and the external driver will move in opposite directions, thereby pulling out the bolt to be pulled out and realizing the quick removal of the bolt.

[0020] When the end of the stroke is reached, remove the entire nail puller and reset the push sleeve. Then, install the bolt to be pulled into the pull sleeve again. Since the bolt to be pulled has been partially pulled out, engage the bolt to be pulled with the second-stage axial thrust plate. Repeat the above-mentioned pulling operation to achieve the second-stage pulling out. By doing so, the long bolt can be completely pulled out through the relay pulling of multiple axial thrust plates.

[0021] Compared with the prior art, this application divides the pulling stroke of a long bolt into multiple pulling segments by setting multiple axial thrust plates, and then realizes the pulling operation of long bolts through the relay pulling of multiple axial thrust plates, fundamentally solving the defect that the bolt puller has a short stroke and cannot be used for pulling long bolts.

[0022] Secondly, this application can achieve the above technical solution by adding multiple axial thrust plates inside the drawing sleeve. It requires minimal structural modification to the entire drawing device, which not only helps to reduce equipment costs but also reduces the difficulty of modifying existing equipment and maximizes the applicability of the equipment. Attached Figure Description

[0023] Figure 1 A schematic diagram of a bolt puller with a relay pulling function provided in Embodiment 1 of this application;

[0024] Figure 2 An exploded view of a bolt puller with a relay pulling function provided in Embodiment 1 of this application;

[0025] Figure 3 A cross-sectional view of a bolt puller with a relay pulling function provided in Embodiment 1 of this application;

[0026] Figure 4 Exploded view of another feasible technical solution for a bolt puller with relay pulling function provided in this application;

[0027] Figure 5 A schematic diagram showing the connection between a bolt puller with relay pulling function and an external driver provided in this application;

[0028] Figure 6 An exploded view of a bolt puller with relay pulling function connected to an external driver, as provided in this application;

[0029] Figure 7 A working state diagram of a bolt puller with relay pulling function provided in this application;

[0030] Figure 8 A working state diagram of another feasible technical solution for a bolt puller with relay pulling function provided in this application;

[0031] Figure 9 A structural schematic diagram of another feasible technical solution for a bolt puller with relay pulling function provided in this application;

[0032] Figure 10 This is a schematic diagram of the starting state of the first pull-out.

[0033] Figure 11This is a schematic diagram of the end state after the first pull-out.

[0034] Figure 12 This is a schematic diagram showing the starting state of the second pull-out.

[0035] Figure 13 This is a schematic diagram of the end state of the second pull-out.

[0036] Reference numerals: 1-Pull-out sleeve, 2-Axial thrust plate, 3-Push-out sleeve, 4-Reset spring, 5-Slide groove, 6-Drive block, 7-Step hole, 8-Connecting screw, 9-Insertion interface, 10-Connecting port, 11-Adjusting block, 12-Snap-fit ​​groove, 13-Auxiliary grip, 101-Pull-out sleeve, 102-Connecting sleeve, 103-External driver, 201-Padded block, 202-Insertion hole.

[0037] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] Implementation Method 1

[0043] Reference Figures 1 to 13 This embodiment, as an optional embodiment of this application, discloses a bolt puller with a relay pulling function, including a pulling sleeve 1 and a pushing sleeve 3. The pulling sleeve 1 includes a pulling tube 101 and a connecting tube 102. Along the axial direction of the pulling tube 101, one end of the pulling tube 101 is threadedly connected to one end of the connecting tube 102, and the pulling tube 101 and the connecting tube 102 are coaxially arranged.

[0044] The free end of the connecting sleeve 102 is connected to the housing of the external driver 103 by screws. It should be noted that the telescopic shaft of the external driver 103 is coaxially connected to the pull sleeve 1.

[0045] Furthermore, the other end of the pull-out sleeve 101 is used to install the bolt to be pulled out. The top of this end of the pull-out sleeve 101 is fully open, that is, along the axial direction of the pull-out sleeve 101, the top of the pull-out sleeve 101 is completely removed to fully expose the cavity inside the pull-out sleeve 101. Along the axial direction of the pull-out sleeve 101, several axial thrust plates 2 are provided inside the pull-out sleeve 101. The axial thrust plates 2 are integrally connected to the inner wall of the pull-out sleeve 101. The axial thrust plates 2 are generally semi-circular in structure, and their top surface is flush with the open end face of the top of the pull-out sleeve 101.

[0046] Each of the axial thrust plates 2 is provided with a plug interface 9 for holding the bolt to be pulled out. The projections of each plug interface along the axial direction of the pulling sleeve 1 are completely coincident to ensure the compatibility between each axial thrust plate 2 and the bolt to be pulled out.

[0047] The insertion interface 9 has an overall U-shaped structure, and the top of the insertion interface 9 is an open structure, so that the bolt to be pulled out can be directly inserted from the radial direction;

[0048] It should be noted that the spacing between each level of axial thrust plate 2 can be the same or different, and the number of axial thrust plates 2 is preferably 2-4 levels;

[0049] In the above structure, the integral connection between each axial thrust plate 2 and the drawing sleeve 1 can effectively improve the connection strength of each axial thrust plate 2, avoid breakage during the drawing process, and improve the service life of the equipment.

[0050] Furthermore, the insertion interface 9 is generally V-shaped, with a large opening at the top, and the top of the insertion interface 9 is an open structure, so that the bolt to be pulled out can be directly inserted from the radial direction.

[0051] The V-shaped insertion interface 9 effectively improves the compatibility with the bolts to be pulled. If the diameter of the bolt to be pulled is small, it is inserted deeper into the insertion interface 9; otherwise, it is offset towards the top of the insertion interface 9. Thus, a single insertion interface 9 can accommodate various bolts of different specifications. A single set of equipment can be used to pull out various bolts. Workers no longer need to carry a large number of operating devices, reducing their workload and eliminating the need to change different pulling sleeves 1, which helps improve work efficiency.

[0052] Meanwhile, the V-shaped connector 9 can also be used to pull out cable connectors, meaning it can be used not only to pull out rail connection bolts but also to pull out rail cable connection bolts, thus meeting the usage requirements of different pulling scenarios.

[0053] Furthermore, each axial thrust plate 2 is provided with a connection port 10, and an adjustment block 11 is inserted into the connection port 10. A snap-fit ​​groove 12 is provided on the outer peripheral surface of the adjustment block 11. The edge of the connection port 10 on the axial thrust plate 2 is snapped into the insertion interface 9. At the same time, an insertion interface 9 is provided on the adjustment block 11. The insertion interface 9 is used to snap into the insertion interface 9 of the receiving and pulling bolt. The insertion interface 9 is arranged in a V-shape.

[0054] With the quick-release adjustment block 11, staff can quickly change different connectors 9, further expanding the variety of connectors 9 while minimizing the amount of equipment carried, thereby meeting different pulling requirements.

[0055] Secondly, the adjusting block 11 can provide a certain degree of protection for the axial thrust plate 2. That is, in the event of severe wear of the insertion interface 9, the normal use of the equipment can be ensured by quickly replacing the adjusting block 11 without having to replace the pull plate sleeve, thereby reducing the operating cost of the equipment and extending the service life of the pull sleeve 101.

[0056] Furthermore, the push sleeve 3 is cylindrical in shape. The push sleeve 3 is sleeved on one end of the pull sleeve 101 where the axial thrust plate 2 is provided, and the push sleeve 3 is slidably sleeved with the pull sleeve 1. That is, the inner diameter of the push sleeve 3 is slightly larger than the outer diameter of the pull sleeve 101, and the push sleeve 3 is sleeved on the outer surface of the pull sleeve 1.

[0057] Meanwhile, the top of the push sleeve 3 is also open, and its open area is directly opposite to the open area of ​​the pull sleeve 101, so that they can cooperate to facilitate quick assembly and disassembly of the bolt to be pulled in the radial direction.

[0058] The above-mentioned structural design can prevent the push sleeve 3 from occupying the internal space of the pull sleeve 1, thereby affecting the setting of the axial thrust plate 2 and ensuring the normal operation of the equipment;

[0059] Furthermore, an auxiliary handle 13 is provided at the bottom of the push sleeve 3 to facilitate the operator in straightening the push sleeve 3 and to help maintain the stability of the entire nail puller.

[0060] Along the axis of the drawing sleeve 101, a driving block 6 is slidably arranged in the middle region. At the same time, a sliding groove 5 is provided at the top and bottom of the middle region of the drawing sleeve 101. The two sliding grooves 5 are arranged opposite each other. The top and bottom of the driving block 6 extend outward through the sliding groove 5 into the drawing sleeve 101, and the extension sections at the top and bottom are respectively fixedly connected to the inner wall of the push sleeve 3.

[0061] Preferably, the top and bottom of the drive block are fixedly connected to the push sleeve 3 by welding.

[0062] The telescopic shaft of the external driver is coaxial with the pulling sleeve 1, and the free end of the telescopic shaft passes through the connecting sleeve 102 and is inserted into the pulling sleeve 101; a stepped hole 7 is provided on the driving block 6, and a connecting screw 8 is inserted into the stepped hole 7, and the connecting screw 8 is threadedly connected to the telescopic shaft of the external driver.

[0063] The above structure ensures that the jacking sleeve 3 is connected to the power of the external drive, while cleverly avoiding the impact on the axial thrust plate 2.

[0064] Furthermore, a reset module is also provided inside the connecting sleeve 102. The reset module includes a reset spring 4. One end of the reset spring 4 abuts against the pull-out sleeve 101, and the other end abuts against the push plate on the telescopic shaft of the external driver.

[0065] Reference Figure 8Furthermore, the bolt puller also includes a pad 201, which is provided with a insertion hole 202 adapted to the bolt to be pulled out. When in use, the pad 201 is placed on the bolt to be pulled out. Along its axial direction, one end face of the pad 201 is in contact with the track clamp, and the other end face is in contact with the push sleeve.

[0066] The spacing between the push sleeve and the clamping plate can be increased by setting the pad block, that is, after the first pulling stroke is completed, the bolt pulling operation can also be achieved through the first-stage axial thrust plate.

[0067] Secondly, the use of pads allows for the pulling of long bolts even with fewer axial thrust plates; this helps to shorten the length of the pulling sleeve, simplify its structure, and thus reduce the cost of the entire equipment.

[0068] When using this application, the nut of the bolt to be pulled out is first pulled out by manual tapping. Then, the exposed nut is inserted into the pulling sleeve. Along the pulling direction, the nut and the first-stage axial thrust plate are in contact with each other. At the same time, the free end of the push sleeve abuts against the side of the track. Driven by the external driver, the push sleeve moves to one side of the track. However, due to the limiting effect of the track, the pulling sleeve and the external driver will move in opposite directions, thereby pulling out the bolt to be pulled out and realizing the rapid removal of the bolt.

[0069] When the end of the stroke is reached, remove the entire nail puller and reset the push sleeve. Then, install the bolt to be pulled into the pull sleeve again. Since the bolt to be pulled has been partially pulled out, engage the bolt to be pulled with the second-stage axial thrust plate. Repeat the above-mentioned pulling operation to achieve the second-stage pulling out. By doing so, the long bolt can be completely pulled out through the relay pulling of multiple axial thrust plates.

[0070] Compared with the prior art, this application divides the pulling stroke of a long bolt into multiple pulling segments by setting multiple axial thrust plates, and then realizes the pulling operation of long bolts through the relay pulling of multiple axial thrust plates, fundamentally solving the defect that the bolt puller has a short stroke and cannot be used for pulling long bolts.

[0071] Secondly, this application achieves the above technical solution by adding multiple axial thrust plates inside the drawing sleeve, which minimizes the structural changes to the entire drawing device. This not only helps reduce equipment costs but also reduces the difficulty of modifying existing equipment, thereby maximizing the applicability of the equipment.

[0072] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A bolt puller with a relay pulling function, characterized in that, include: Pulling sleeve (1), along the axial direction of the pulling sleeve (1), one end of the pulling sleeve (1) is connected to an external driver, and the other end is provided with several axial thrust plates (2) adapted to the bolt to be pulled. Push sleeve (3), which is slidably mounted on the pull sleeve (1), and the push sleeve (3) is connected to the telescopic shaft of the external driver.

2. A bolt puller with relay pulling function according to claim 1, characterized in that, The pull sleeve (1) includes a pull sleeve (101) and a connecting sleeve (102) connected by threads, wherein the connecting sleeve (102) is connected to the housing of the external driver; the push sleeve (3) is slidably sleeved on the pull sleeve (101); a reset module is also provided inside the connecting sleeve (102).

3. A bolt puller with relay pulling function according to claim 2, characterized in that, The reset module includes a reset spring (4), one end of which abuts against the pull-out sleeve (101), and the other end abuts against the telescopic shaft of the external driver.

4. A bolt puller with relay pulling function according to claim 2, characterized in that, Along the radial direction of the pull-out sleeve (101), the top and bottom ends of the pull-out sleeve (101) are provided with mutually opposite sliding grooves (5). A drive block (6) is slidably arranged inside the pull-out sleeve (101). The drive block (6) is connected to the telescopic shaft of the external driver. The top and bottom of the drive block (6) pass through the two sliding grooves (5) respectively and are connected to the push sleeve (3).

5. A bolt puller with relay pulling function according to claim 4, characterized in that, The drive block (6) is provided with a stepped hole (7), and a connecting screw (8) is inserted into the stepped hole (7). The connecting screw (8) is threadedly connected to the telescopic shaft of the external driver.

6. A bolt puller with relay pulling function according to claim 1, characterized in that, Each of the axial thrust plates (2) is provided with a plug interface (9) for holding the pull-out bolt, and the plug interface (9) is arranged in a V-shape.

7. A bolt puller with relay pulling function according to claim 1, characterized in that, Each axial thrust plate (2) is provided with a connection port (10), and an adjustment block (11) is inserted into the connection port (10). The adjustment block (11) is provided with a plug interface (9) for locking the pull-out bolt. The plug interface (9) is V-shaped.

8. A bolt puller with relay pulling function according to claim 7, characterized in that, The outer circumferential surface of the adjusting block (11) is provided with a snap-fit ​​groove (12), and the axial thrust plate (2) is inserted into the insertion interface (9).

9. A bolt puller with relay pulling function according to claim 2, characterized in that, Along the radial direction of the pull-out sleeve (101), the top of the pull-out sleeve (101) and the top of the push sleeve (3) are both open to allow for quick assembly and disassembly of the bolt to be pulled out in the radial direction.

10. A bolt puller with relay pulling function according to claim 1, characterized in that, The bolt puller also includes a pad (201) with a insertion hole (202) adapted to the bolt to be pulled out.

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