Retreating and pulling device

By designing a pull-out device, the pull-out rod applies impact force along the roller axis direction to the sliding sleeve, which solves the problem of difficult removal of the sliding sleeve in roller assembly, and achieves the guarantee of rapid removal and welding accuracy.

CN222588707UActive Publication Date: 2025-03-11HENGYANG HELI INDAL VEHICLE
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Patent Information

Application Number
CN202420616980.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-28
Publication Date
2025-03-11
Estimated Expiration
2034-03-28

AI Technical Summary

Technical Problem

During the roller assembly process, the roller expands due to high temperature welding, making it difficult to quickly remove the slip sleeve. The prior art relies on manual strikes, resulting in the welding accuracy that cannot be guaranteed.

Method used

A withdrawal device is designed to apply impact force along the roller axis direction to the slide sleeve through the withdrawal rod to gradually separate the slide sleeve and the roller.

Benefits of technology

The sliding sleeve is quickly and conveniently removed, avoiding radial impact on the rollers, and ensuring welding accuracy.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a withdrawing device, which relates to the technical field of product assembly and is characterized in that a roller to be welded is positioned and mounted at a first end of a sliding sleeve, a withdrawing rod is mounted at a second end of the sliding sleeve, and at least one part of the withdrawing rod extends out of the sliding sleeve; after the rolling wheel is welded, the withdrawing and pulling rod is subjected to external acting force, the withdrawing and pulling rod further applies impact force to the sliding sleeve, the direction of the impact force is in the axis direction of the rolling wheel from the first end to the second end of the sliding sleeve, and the sliding sleeve can be gradually separated from the rolling wheel by continuously applying the impact force. In one embodiment, the sliding sleeve can be impacted by the withdrawing rod to be separated through the movement of the withdrawing rod relative to the sliding sleeve. In one embodiment, the withdrawing and pulling block can be installed on the withdrawing and pulling rod in a sliding mode, the withdrawing and pulling block impacts the withdrawing and pulling rod, and therefore the sliding sleeve is separated.
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Description

Technical Field

[0001] The utility model relates to the technical field of product assembly, and further relates to a withdrawal device. Background Art

[0002] When assembling the roller, a sleeve is required for positioning. First, the roller is positioned in the sleeve, and the roller is placed in the corresponding welding position through the sleeve. After the roller is positioned with the sleeve, the roller is welded to the corresponding position. Due to the thermal expansion and contraction effect of the parts, the roller expands due to the high temperature of welding, causing the roller to expand in the sleeve, making it difficult to quickly pull out the sleeve.

[0003] The current method of removing the sliding sleeve requires manual knocking on the sliding sleeve left and right until it becomes loose before demoulding, which can easily cause the rollers for welding to detach synchronously and cannot effectively ensure the welding accuracy.

[0004] For those skilled in the art, how to remove the sliding sleeve quickly and conveniently is a technical problem that needs to be solved at present. Utility Model Content

[0005] The core of the utility model is to provide a withdrawal device, which can separate the sliding sleeve and the roller from each other by means of the impact force of the withdrawal rod on the sliding sleeve, and the impact force of the separation is along the axial direction of the roller, which can avoid radial impact force on the roller and prevent loosening. The specific scheme is as follows:

[0006] A withdrawal device, comprising:

[0007] A sliding sleeve, a first end of which is used to accommodate and position the roller to be welded;

[0008] A withdrawal rod is mounted on the second end of the sliding sleeve; at least a portion of the withdrawal rod extends out of the sliding sleeve;

[0009] When the roller welding is completed, the pull-out rod is used to bear the external force, and the pull-out rod can transmit the impact force to the sleeve, and the direction of the impact force is along the axis direction of the roller, from the first end of the sleeve toward the second end.

[0010] Optionally, the withdrawal rod is slidably assembled on the sliding sleeve, and the first end of the withdrawal rod can contact a roller placed in the sliding sleeve to adjust the position of the roller;

[0011] When the withdrawal rod moves from the first end to the second end, a withdrawal impact force can be applied to the sliding sleeve.

[0012] Optionally, a withdrawal block is slidably mounted on the withdrawal rod, and the withdrawal block is located outside the sliding sleeve; when the withdrawal block moves along the withdrawal rod and impacts the second end of the withdrawal rod, the withdrawal rod can apply a withdrawal impact force to the sliding sleeve.

[0013] Optionally, a first enlarged portion is provided at the first end of the withdrawal rod, and a second enlarged portion is provided at the second end;

[0014] The first enlarged portion is used to contact the second step surface provided at the second end of the sliding sleeve to transmit the impact force; the second enlarged portion is used to withstand the impact force generated by the withdrawal block.

[0015] Optionally, at least one of the first enlarged portion or the second enlarged portion is assembled to the withdrawal rod by means of threads or snaps.

[0016] Optionally, a first step surface is provided in the inner cavity of the first end of the sliding sleeve to limit the maximum penetration position of the roller; when the roller contacts the first step surface, a portion of the roller is exposed from the sliding sleeve.

[0017] Optionally, the outer surface of the second end of the sliding sleeve is enlarged to provide a step protrusion, or a ring groove depression, so as to withstand the pulling force.

[0018] Optionally, a guide chamfer is provided in the inner cavity of the first end of the sliding sleeve.

[0019] Optionally, the cross-sectional dimensions of the withdrawal rods are equal;

[0020] The withdrawal rod is a cylindrical rod, or the outer surface of the withdrawal rod is provided with a spline for guiding.

[0021] The utility model provides a withdrawal device, wherein the first end of the sliding sleeve is used to position and install the roller to be welded, and the second end of the sliding sleeve is provided with a withdrawal rod, and at least a part of the withdrawal rod extends out of the sliding sleeve; when the roller welding is completed, the withdrawal rod is subjected to external force, and the withdrawal rod then applies an impact force to the sliding sleeve, and the direction of the impact force is along the axis direction of the roller, from the first end of the sliding sleeve toward the second end, and the sliding sleeve can be gradually separated from the roller by continuously applying the impact force. In one embodiment, the sliding sleeve can be separated by the withdrawal rod impacting the withdrawal rod through the movement of the withdrawal rod relative to the sliding sleeve. In one embodiment, a withdrawal block can be slidably installed on the withdrawal rod, and the withdrawal block impacts the withdrawal rod, thereby separating the sliding sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1A schematic structural diagram of a first embodiment of the withdrawal device provided by the utility model;

[0024] Figure 2 A schematic structural diagram of a second embodiment of the withdrawal device provided by the utility model;

[0025] Figure 3 A schematic structural diagram of a third embodiment of the withdrawal device provided by the utility model;

[0026] Figure 4 A schematic structural diagram of a fourth embodiment of the withdrawal device provided by the utility model;

[0027] Figure 5 It is a cross-sectional view of a specific embodiment of the withdrawal rod.

[0028] The figure includes:

[0029] The sliding sleeve 1 , the first step surface 11 , the second step surface 12 , the step protrusion 13 , the withdrawal rod 2 , the first enlarged portion 21 , the second enlarged portion 22 , and the withdrawal block 3 . DETAILED DESCRIPTION

[0030] The core of the utility model is to provide a withdrawal device, which can separate the sliding sleeve and the roller from each other by means of the impact force of the withdrawal rod on the sliding sleeve, and the impact force of the separation is along the axial direction of the roller, which can avoid radial impact force on the roller and prevent loosening.

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the withdrawal device of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] The utility model provides a withdrawal device, comprising a sliding sleeve 1 and a withdrawal rod 2. The first end of the sliding sleeve 1 is used to accommodate and position the roller to be welded. Figure 1 As shown, the left end is the first end and the right end is the second end. The first end of the sleeve 1 is provided with a channel communicating with the outside world, and the channel is used to accommodate a roller, the axial direction of the roller is parallel to the axial direction of the sleeve 1, and the outer periphery of the roller is in contact with the inner cavity surface of the sleeve 1 to achieve circumferential positioning.

[0033] The withdrawal rod 2 is installed at the second end of the sliding sleeve 1; at least a part of the withdrawal rod 2 extends out of the sliding sleeve 1, and the part of the withdrawal rod 2 extending out of the sliding sleeve 1 can withstand external forces.

[0034] When welding the roller, first place the roller in the sleeve 1, with a part of the roller extending out of the sleeve 1, place the roller in the position to be welded through the sleeve 1, and weld and fix the roller in place. After the roller welding is completed, an impact force is applied from the outside to the pull-out rod 2, and the pull-out rod 2 bears the external impact, and the pull-out rod 2 then transmits the impact force to the sleeve 1. The direction of the impact force is along the axis of the roller, from the first end of the sleeve 1 to the second end, that is, the impact received by the sleeve 1 is in the direction away from the roller, parallel to the axial direction of the roller, which can prevent the roller from being impacted in the radial direction and prevent the welding position of the roller from being damaged. In addition, the sleeve 1 itself does not directly bear the impact from the outside, which can prevent the sleeve from being radially displaced due to the impact of external force, and can prevent the sleeve 1 from being damaged.

[0035] Based on the above technical solution, combined with Figure 1 , Figure 2 , Figure 3 As shown, the withdrawal rod 2 of the present invention is slidably assembled on the sliding sleeve 1, and the first end of the withdrawal rod 2 extends into the inner cavity of the sliding sleeve 1. In addition, the withdrawal rod 2 can also be provided with an inner cavity, and the sleeve is surrounded by the sliding sleeve 1, and such a structure should also be included in the protection scope of the present invention.

[0036] The withdrawal rod 2 can move along the axial direction of the sleeve 1, that is, the axial direction of the roller. Figure 1 The middle left end) can contact the roller placed in the sleeve 1 to adjust the position of the roller, that is, the first end of the pull-out rod 2 contacts the roller, thereby limiting the axial position of the roller and adjusting the size of the roller exposed outside the sleeve 1.

[0037] When the withdrawal rod 2 moves from the first end to the second end, it can exert an impact force on the sliding sleeve 1 to withdraw the sleeve. Figure 1 , Figure 2 , Figure 3 As shown, when the withdrawal rod 2 moves from left to right relative to the sliding sleeve 1, the first end of the withdrawal rod 2 exerts an impact force on the sliding sleeve 1. The magnitude of the impact force is related to the movement speed of the withdrawal rod 2. The greater the speed, the greater the impact force. The way in which the withdrawal rod 2 moves relative to the sliding sleeve 1 to generate impact does not require other structures. Figure 3 , the impact is completed only by the withdrawal rod 2. Figure 3 In the case shown, the external force borne by the withdrawal rod 2 is the force applied to the withdrawal rod 2 by the operator or other tools, which causes the withdrawal rod 2 to produce axial displacement and eventually contact the sliding sleeve 1 to form an impact.

[0038] The withdrawal rod 2 is slidably mounted with a withdrawal block 3, which is annular and located outside the sleeve 1; when the withdrawal block 3 moves along the withdrawal rod 2 and impacts the second end of the withdrawal rod 2, the withdrawal rod 2 can exert an impact force to pull out the sleeve 1. In this embodiment, the impact force is mainly generated by the withdrawal block 3, and the withdrawal rod 2 does not need to move relative to the sleeve 1. At this time, the withdrawal rod 2 is mainly used to adjust the position of the roller in the sleeve 1.

[0039] Combination Figure 4 As shown, there is a schematic diagram of the structure in which the withdrawal rod 2 is fixed on the sleeve 1, which can be fixed as a whole by welding. In this embodiment, the withdrawal rod 2 cannot be displaced relative to the sleeve 1, and it is necessary to use other structures to apply an impact force to the withdrawal rod 2. At this time, an instantaneous impact force can be applied to the withdrawal rod 2 with the help of other structures, so that the sleeve 1 and the withdrawal rod 2 are impacted together.

[0040] Combination Figure 1 , Figure 2 , Figure 3 As shown, the first end of the withdrawal rod 2 is provided with a first enlarged portion 21, and the second end is provided with a second enlarged portion 22. The outer diameters of the first enlarged portion 21 and the second enlarged portion 22 are both larger than the outer diameter of the withdrawal rod 2. The withdrawal rod 2 can be inserted into the channel provided at the second end of the sliding sleeve 1, and the first enlarged portion 21 and the second enlarged portion 22 cannot pass through the channel. A second step surface 12 is provided at the second end of the sliding sleeve 1. When the withdrawal rod 2 moves from the first end to the second end, the first enlarged portion 21 contacts the second step surface 12 provided at the second end of the sliding sleeve 1 to conduct the impact force; the second enlarged portion 22 is used to withstand the impact force generated by the withdrawal block 3.

[0041] At least one of the first enlarged portion 21 or the second enlarged portion 22 is assembled on the withdrawal rod 2 by means of a thread or a buckle. Figure 1 , Figure 2 , Figure 3 As shown, in the structure shown, the second enlarged portion 22 is threadedly connected to the withdrawal rod 2 as an example, the second enlarged portion 22 is provided with an internal thread, and the withdrawal rod 2 is provided with an external thread, and the two form a threaded connection. In this embodiment, the first enlarged portion 21 and the withdrawal rod 2 are integrally formed. Of course, the relative positions of the first enlarged portion 21 and the second enlarged portion 22 can be exchanged. The first enlarged portion 21 and the second enlarged portion 22 can simultaneously adopt a detachable connection method.

[0042] Combination Figure 1 , Figure 3As shown, a first step surface 11 is provided in the inner cavity of the first end of the sleeve 1 to limit the maximum depth of the roller. It should be ensured that when the roller contacts the first step surface 11, a part of the roller is exposed from the sleeve 1 to ensure that the roller protruding outward can be welded and will not affect the sleeve 1; and the first bulge 21 can push the roller outward to adjust the degree of roller protrusion. Of course, the utility model should also include a structure without a first step surface. In this case, the roller is completely pushed by the first bulge 21 to achieve position limitation.

[0043] Combination Figure 1 , Figure 3 As shown, the outer surface of the second end of the sleeve 1 is enlarged to provide a step protrusion 13, or an annular groove depression; the protrusion 13 or the annular groove depression can be a complete circumferential arrangement structure, or can be a plurality of independent split structures. The protrusion 13 or the annular groove depression can be used to withstand the pulling force. In some cases, the sleeve 1 can be pulled outward by the protrusion 13 or the annular groove depression to provide assistance for outward pulling.

[0044] Combination Figure 1 As shown, a guide chamfer is provided in the inner cavity of the first end of the sliding sleeve 1 to facilitate the placement of the roller.

[0045] In the embodiment of the utility model, the cross-sectional dimensions of the withdrawal rod 2 are equal; the withdrawal rod 2 is a cylindrical rod, or the outer surface of the withdrawal rod 2 is provided with a spline for guiding. Figure 5 As shown, the cross-sectional structure of the spline for guiding is shown in the figure, and a channel for sliding with the spline needs to be provided on the sleeve 1. Of course, the pull-out rod 2 can be a cylindrical rod structure with a smooth appearance.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A withdrawal device, characterized in that: include: A sliding sleeve (1), a first end of which is used to accommodate and position a roller to be welded; A withdrawal rod (2) is mounted on the second end of the sliding sleeve (1); at least a portion of the withdrawal rod (2) extends out of the sliding sleeve (1); When the roller welding is completed, the pull-out rod (2) is used to bear the external force, and the pull-out rod (2) can transmit the impact force to the sleeve (1), and the direction of the impact force is along the axis direction of the roller, from the first end of the sleeve (1) toward the second end.

2. The withdrawal device according to claim 1, characterized in that: The withdrawal rod (2) is slidably mounted on the sliding sleeve (1), and the first end of the withdrawal rod (2) can contact a roller placed in the sliding sleeve (1) to adjust the position of the roller; When the withdrawal rod (2) moves from the first end to the second end, it can exert a withdrawal impact force on the sliding sleeve (1).

3. The extraction device according to claim 1 or 2, characterized in that: A withdrawal block (3) is slidably mounted on the withdrawal rod (2), and the withdrawal block (3) is located outside the sliding sleeve (1); when the withdrawal block (3) moves along the withdrawal rod (2) and impacts the second end of the withdrawal rod (2), the withdrawal rod (2) can exert a withdrawal impact force on the sliding sleeve (1).

4. The extraction device according to claim 3, characterized in that: The first end of the withdrawal rod (2) is provided with a first enlarged portion (21), and the second end is provided with a second enlarged portion (22); The first enlarged portion (21) is used to contact a second step surface (12) provided at the second end of the sliding sleeve (1) to transmit impact force; and the second enlarged portion (22) is used to withstand the impact force generated by the withdrawal block (3).

5. The extraction device according to claim 4, characterized in that: At least one of the first enlarged portion (21) or the second enlarged portion (22) is assembled to the withdrawal rod (2) by means of a thread or a snap fit.

6. The extraction device according to claim 3, characterized in that: A first step surface (11) is provided in the inner cavity of the first end of the sliding sleeve (1) for limiting the maximum penetration position of the roller; when the roller contacts the first step surface (11), a portion of the roller is exposed outside the sliding sleeve (1).

7. The extraction device according to claim 3, characterized in that: The outer surface of the second end of the sliding sleeve (1) is enlarged to provide a step protrusion (13), or a ring groove depression, for bearing the pulling force.

8. The withdrawal device according to claim 3, characterized in that: The inner cavity of the first end of the sliding sleeve (1) is provided with a guide chamfer.

9. The extraction device according to claim 3, characterized in that: The cross-sectional dimensions of the withdrawal rods (2) are equal; The withdrawal rod (2) is a cylindrical rod, or the outer surface of the withdrawal rod (2) is provided with a spline for guiding.