A repair device for the threaded conduit under rail vehicles

Abstract

This invention discloses a thread repair device for undercarriage conduits of rail vehicles, belonging to the technical field of rail transit vehicle body component repair. The invention includes a sleeve that can be fitted onto the outside of the conduit to be repaired; one end of the sleeve has a square hole for connecting to a wrench, and the other end is fitted with a die; a guide support mandrel is installed inside the sleeve for extending into the conduit to support it; and a support component that can be erected between any three conduits; the support component has a guide tube in the middle that can be fitted onto the outside of the conduit to allow the die to repair the thread, the guide tube, and the guide support mandrel to support the conduit from both the outside and inside. This invention can stably support the conduit to be repaired, improve the strength of the conduit itself, and avoid thread damage caused by pipe shaking during threading. It has the advantages of simple structure, convenient use, time and labor saving, improved threading quality, and reduced maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of rail transit vehicle body component repair technology, and in particular to a rail vehicle undercarriage pipe thread repair device. Background Technology

[0002] The stainless steel rail vehicle is equipped with electrical equipment such as a power distribution cabinet on the vehicle, and inverters, batteries and other equipment are hoisted under the vehicle. The equipment on the vehicle and under the vehicle are connected by cables. In order to avoid damage to the cables and other equipment by the steel structure of the underframe, a large number of cable conduits are welded on the steel structure of the underframe. The cable conduits are made of stainless steel and have threads at the bottom.

[0003] During vehicle production, welding, adjustment, and pipe installation can all damage the threads of conduits. Operators need to repair the threads on-site. Since conduits are usually grouped in sets of 3-5 with a spacing of less than 150mm, the operating space is small when repairing the threads, which can easily cause further damage to the threads. This can lead to damaged conduit threads that cannot meet the usage requirements, requiring the conduit to be cut off and replaced with a new one. Due to the limited space, cutting off the conduit can also damage the floor and other components, which is time-consuming and labor-intensive.

[0004] The existing thread repair process involves manual repair by the operator using a die and die wrench. Due to the small spacing and inconsistent height of the conduits, the die can only be twisted slightly and readjusted after a certain angle. If the force is not applied properly, the die will deflect from the conduit, which will affect the quality of the repaired thread and cause intermittent problems, affecting its use. When the conduit is thin, the threading process may also cause shaking, denting and deformation, which will affect the thread repair effect.

[0005] Therefore, in view of the above problems, it is necessary for the present invention to provide a rail vehicle undercarriage conduit thread repair device that can not only work with a ratchet wrench to continuously repair threads, but also ensure that the die axis is parallel to the conduit axis during operation, thus avoiding thread damage caused by conduit shaking and denting. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects of the existing technology and provide a device for repairing the thread of the undercarriage pipe of a rail vehicle.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention discloses a device for repairing the threaded conduit of a rail vehicle undercarriage, comprising:

[0009] A sleeve that can be fitted over the outside of the conduit to be repaired;

[0010] One end of the sleeve has a square hole for connecting to a wrench, and the other end is fitted with a die. A guide support spindle is installed inside the sleeve to extend into and support the conduit to be repaired.

[0011] A support component capable of being installed between any three conduits;

[0012] The support component has a conduit in the middle that can be sleeved on the outside of the tube to be repaired, so that the die repair thread, the conduit, and the guide support mandrel support the tube to be repaired from the outside and inside.

[0013] Furthermore, the sleeve has an internal cavity with a threaded hole. One end of the guide support mandrel is threadedly connected to the threaded hole via a screw, and the other end of the guide support mandrel has at least one mating section that can extend into the conduit to be repaired.

[0014] Furthermore, an adjusting sleeve is fitted at the end of the sleeve located in the accommodating cavity, and the die is fitted inside the adjusting sleeve. The sleeve is circumferentially distributed with set screws, which penetrate the sleeve and are threadedly connected to the adjusting sleeve. The end of the set screw abuts against a positioning groove formed on the outer diameter of the die.

[0015] Furthermore, the mating section has a through hole, and a pin is inserted into the through hole to drive the guide support spindle to rotate.

[0016] Furthermore, the two ends of the conduit are threaded with movable sleeves, and the inner wall of the movable sleeves mates with the outer wall of the conduit to be repaired.

[0017] Furthermore, the support component also includes positive and negative threaded screws symmetrically distributed on both sides of the conduit. The two ends of the positive and negative threaded screws are threaded to limit blocks. One side of the limit block is provided with a groove for engaging with an adjacent conduit, and the other side is connected to the conduit through a connecting arm.

[0018] Furthermore, the groove is a V-shaped groove, and the two inclined surfaces of the V-shaped groove are successively formed with arc surfaces of different diameters for fitting against the outer wall of the conduit to be repaired.

[0019] Furthermore, the connecting arm includes a body portion and an extension rod threadedly connected to the body portion. Both the extension rod and the end of the body portion are formed with joints, which are connected to the limiting block and the conduit respectively by bolts.

[0020] Furthermore, the wrench is a ratchet wrench.

[0021] In the above technical solution, the present invention provides a repair device for the threaded conduit of a rail vehicle undercarriage, which has the following advantages:

[0022] 1. The sleeve designed in this invention has a guide support mandrel installed inside. The guide support mandrel can not only ensure that the die and the thread match quickly and accurately, but also support the tube body and avoid damage to the thread when the force is too large. Secondly, the bottom end of the sleeve is equipped with a ratchet wrench, which can provide the operator with a stable operating angle and ensure stable and continuous force application, improve the threading quality, and help reduce maintenance costs.

[0023] 2. The bracket component designed in this invention connects the three conduits into one unit, which effectively improves the strength of the conduit to be repaired and avoids the problem of thread damage caused by the shaking of the conduit during the threading process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1 This is an isometric view of a rail vehicle undercarriage thread repair device disclosed in this invention;

[0026] Figure 2 This is a front view of a rail vehicle undercarriage thread repair device disclosed in this invention;

[0027] Figure 3 This is an isometric drawing of a sleeve for a track vehicle undercarriage thread repair device disclosed in this invention;

[0028] Figure 4 This is a top view of a sleeve for a track vehicle undercarriage thread repair device disclosed in this invention;

[0029] Figure 5 This is an isometric view of a guide support mandrel for a track vehicle undercarriage thread repair device disclosed in this invention;

[0030] Figure 6 This is a front view of the die of a rail vehicle undercarriage thread repair device disclosed in this invention;

[0031] Figure 6a This is a cross-sectional view of the die of a rail vehicle undercarriage thread repair device disclosed in this invention;

[0032] Figure 7 This is an isometric view of a bracket component for a rail vehicle undercarriage thread repair device disclosed in this invention;

[0033] Figure 8This is a top view of a bracket component for a track vehicle undercarriage thread repair device disclosed in this invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Sleeve; 2. Guide support mandrel; 3. Support assembly; 4. Conduit to be repaired;

[0036] 101. Connecting post; 102. Ratchet wrench; 103. Adjusting sleeve; 104. Die; 1041. Positioning groove; 105. Set screw;

[0037] 201. Screw; 202. Mating section; 203. Pin;

[0038] 301, Limiting block; 3011, Groove; 3012, Arc surface; 302, Positive and negative threaded screw; 303, Movable sleeve; 304, Guide tube; 305, Connecting arm; 306, Extension rod. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] See Figure 1 , 2 As shown;

[0041] An invention relates to a device for repairing the threaded conduit under a rail vehicle, comprising:

[0042] Sleeve 1, which can be fitted onto the outside of the conduit 4 to be repaired;

[0043] One end of the sleeve 1 has a square hole for connecting to a wrench, and the other end is fitted with a die 104. A guide support spindle 2 is installed inside the sleeve 1 to extend into and support the conduit 4 to be repaired.

[0044] Support component 3, capable of being installed between any three conduits;

[0045] The bracket component 3 has a conduit 304 in the middle that can be sleeved on the outside of the tube 4 to be repaired, so that the die 104 repairs the thread, the conduit 304 and the guide support mandrel 2 support the tube 4 to be repaired from the outside and inside.

[0046] Specifically, the track vehicle undercarriage conduit thread repair device includes a sleeve 1, a guide support mandrel 2, and a bracket component 3. One end of the sleeve 1 has a square hole for connection to a wrench, which is a ratchet wrench 102 in the prior art. The other end of the sleeve 1 is fitted with a die 104. The guide support mandrel 2 passes through the die 104 and is installed inside the sleeve 1. When the die 104 is threaded, the guide support mandrel 2 extends into the conduit 4 to be repaired to support the conduit 4. In addition, to avoid shaking due to the strength of the conduit itself, the bracket component 3 connects three adjacent conduits into one unit to prevent the conduit 4 to be repaired from shaking under force during the threading process of the die 104. The middle part of the bracket component 3 is fitted onto the outside of the conduit 4 through a guide tube 304, thereby realizing the thread repair of the die 104. The guide tube 304 and the guide support mandrel 2 support the conduit 4 from the outside and inside.

[0047] See Figure 3 , 4 As shown in Figure 5:

[0048] Preferably, the sleeve 1 has an internal accommodating cavity. Specifically, the sleeve 1 is a cylindrical structure. One end of the sleeve 1 has an integrally formed connecting post 101 with a square hole. The other end of the sleeve 1 has an accommodating cavity to accommodate the guide support mandrel 2. The accommodating cavity has a threaded hole. One end of the guide support mandrel 2 is threadedly connected to the threaded hole via a screw 201. The other end of the guide support mandrel 2 has at least one mating section 202 that can extend into the conduit 4 to be repaired. Specifically, the mating section 202 can be multiple sections; in this embodiment, only three sections are used as an example (e.g., Figure 5 As shown), the multi-section mating section 202 is distributed in a form with the diameter increasing sequentially, so that the guide support mandrel 2 can be matched with the pipe 4 to be repaired with different diameters, thereby improving the versatility of the guide support mandrel 2. The top of the mating section 202 is formed with a spherical surface, which facilitates the smooth entry of the support mandrel into the pipe 4 to be repaired.

[0049] See Figure 3 , 4 As shown:

[0050] Preferably, the sleeve 1 is fitted with an adjusting sleeve 103 at the end of the receiving cavity, and a die 104 is fitted inside the adjusting sleeve 103. The sleeve 1 is evenly distributed with set screws 105 around its circumference. The set screws 105 pass through the sleeve 1 and are threadedly connected to the adjusting sleeve 103. The end of the set screw 105 abuts against the positioning groove 1041 opened on the outer diameter of the die 104. In this structure, the set screws 105 fix the connection between the sleeve 1, the adjusting sleeve 103 and the die 104, making it convenient to replace the adjusting sleeve 103 with different ones to adapt to different dies 104.

[0051] See Figure 6 ,6a As shown, in order to ensure the positioning accuracy of the die 104, a tapered positioning groove 1041 is opened on the outer diameter of the die 104 corresponding to the position of the set screw 105;

[0052] See Figure 4 , 5 As shown:

[0053] To facilitate the installation of the guide support mandrel 2, in a preferred embodiment, the mating section 202 of the guide support mandrel 2 is provided with a through hole, and a pin 203 is inserted and pulled into the through hole to drive the guide support mandrel 2 to rotate.

[0054] See Figure 7 As shown:

[0055] Preferably, the conduit 304 is threaded to both ends with a movable sleeve 303. The inner wall of the movable sleeve 303 fits with the outer wall of the tube 4 to be repaired. The outer wall of the movable sleeve 303 has an external thread. In this structure, the conduit 304 straightens the tube 4 to be repaired through the movable sleeve 303. At the same time, the movable sleeve 303 is threaded to the conduit 304, which facilitates the extension of the overall length of the conduit 304, thereby adapting to tubes 4 of different lengths to be repaired. The movable sleeve 303 has a through hole, through which a pin 203 is inserted and pulled, and the pin 203 drives it to rotate and adjust its position.

[0056] See Figure 3 As shown:

[0057] Preferably, the support component 3 further includes positive and negative threaded rods 302 symmetrically distributed on both sides of the conduit 304. The two ends of the positive and negative threaded rods 302 are threadedly connected to limit blocks 301. One side of the limit block 301 is provided with a groove 3011 that engages with the adjacent conduit, and the other side is connected to the conduit 304 through a connecting arm 305. The connecting arm 305 includes a body and an extension rod 306 threadedly connected to the body. Both the extension rod 306 and the end of the body are formed with joints. The joints are connected to the limit block 301 and the conduit 304 respectively by bolts. Specifically, in this structure, the limiting block 301 is screwed to the positive and negative threaded screw 302. The bottom end of the positive and negative threaded screw 302 is provided with a square hole for cooperating with a wrench. When in use, the wrench drives the positive and negative threaded screw 302 to rotate, adjusting the distance between the two limiting blocks 301, so that the bracket component 3 adapts to the distance between the conduit 4 to be repaired and the adjacent conduit, so that the bracket component 3 is supported between the three conduits, assisting in supporting the conduit 4 to be repaired, which helps to improve the strength of the conduit 4 to be repaired.

[0058] See Figure 7 , 8 As shown:

[0059] Preferably, the groove 3011 is a V-shaped groove, and the two inclined surfaces of the V-shaped groove are successively formed with arc surfaces 3012 of different diameters for fitting with the outer wall of the conduit 4 to be repaired. In this structure, in order to ensure that the groove 3011 of the limiting block 301 can contact the surface of the conduit 4 to be repaired, the two inclined surfaces are successively formed with arc surfaces 3012 of different diameters. By fitting the arc surface 3012 with the outer wall of the conduit 4 to be repaired, it is beneficial to improve the support stability of the bracket component 3. The diameter of the stainless steel conduit commonly used under rail vehicles is 34 / 32 / 40mm, and the arc surface 3012 can be adapted to the diameter of the conduit.

[0060] In the above technical solution, the present invention provides a device for repairing the thread of the undercarriage conduit of a rail vehicle:

[0061] Instructions for use: First, the support component 3 is fitted onto the outside of the conduit 4 to be repaired through the conduit 304. The forward and reverse threaded screw 302 is driven to rotate and the position of the limit block 301 is adjusted so that the support component 3 is supported between the three conduits. The sleeve 1 is fitted onto the end of the conduit 4 to be repaired. The guide support mandrel 2 extends into the conduit 4 to be repaired. As the guide support mandrel 2 gradually enters the conduit 4 to be repaired, the die 104 matches the thread. After matching, the ratchet wrench 102 is adjusted to continuously and stably apply force to achieve thread repair.

[0062] Beneficial effects:

[0063] 1. The sleeve designed in this invention has a guide support mandrel installed inside. The guide support mandrel can not only ensure that the die and the thread match quickly and accurately, but also support the tube body and avoid damage to the thread when the force is too large. Secondly, the bottom end of the sleeve is equipped with a ratchet wrench, which can provide the operator with a stable operating angle and ensure stable and continuous force application, improve the threading quality, and help reduce maintenance costs.

[0064] 2. The bracket component designed in this invention connects the three conduits into one unit, which effectively improves the strength of the conduit to be repaired and avoids the problem of thread damage caused by the shaking of the conduit during the threading process.

[0065] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for repairing the threaded conduit of a rail vehicle, characterized in that, include: A sleeve (1) that can be fitted onto the outside of the conduit (4) to be repaired; The sleeve (1) has a square hole at one end for connecting to a wrench, and a die (104) at the other end. A guide support spindle (2) is installed inside the sleeve (1) to extend into the conduit (4) to support it. A bracket component (3) that can be installed between any three conduits; The bracket component (3) has a conduit (304) in the middle that can be sleeved on the outside of the tube (4) to be repaired, so that the die (104) repairs the thread, the conduit (304) and the guide support mandrel (2) support the tube (4) to be repaired from the outside and inside.

2. The device for repairing the threaded conduit of a rail vehicle according to claim 1, characterized in that... ； The sleeve (1) has a cavity inside, and a threaded hole is provided in the cavity. One end of the guide support spindle (2) is threadedly connected to the threaded hole through a screw (201). The other end of the guide support spindle (2) has at least one mating section (202) that can extend into the inside of the tube (4) to be repaired.

3. The device for repairing the threaded conduit of a rail vehicle according to claim 2, characterized in that... ； The sleeve (1) is fitted with an adjusting sleeve (103) at the end of the accommodating cavity. The die (104) is fitted inside the adjusting sleeve (103). The sleeve (1) is circumferentially distributed with set screws (105). The set screws (105) pass through the sleeve (1) and are threadedly connected to the adjusting sleeve (103). The end of the set screw (105) abuts against the positioning groove (1041) opened on the outer diameter of the die (104).

4. The device for repairing the threaded conduit of a rail vehicle according to claim 2, characterized in that... ； The mating section (202) has a through hole, and a pin (203) is inserted and connected to the through hole, which drives the guide support spindle (2) to rotate.

5. A device for repairing the threaded conduit of a rail vehicle according to claim 1, characterized in that... ； The conduit (304) has a movable sleeve (303) threaded to both ends, and the inner wall of the movable sleeve (303) fits with the outer wall of the conduit (4) to be repaired.

6. The device for repairing the threaded conduit of a rail vehicle according to claim 1, characterized in that... ； The support component (3) also includes positive and negative threaded screws (302) symmetrically distributed on both sides of the conduit (304). The two ends of the positive and negative threaded screws (302) are threadedly connected to limit blocks (301). One side of the limit block (301) is provided with a groove (3011) that engages with the adjacent conduit, and the other side is connected to the conduit (304) through a connecting arm (305).

7. A device for repairing the threaded conduit of a rail vehicle according to claim 6, characterized in that... ； The groove (3011) is a V-shaped groove, and the two inclined surfaces of the V-shaped groove are successively formed with arc surfaces (3012) of different diameters, which are used to fit with the outer wall of the pipe (4) to be repaired.

8. A device for repairing the threaded conduit under a rail vehicle according to claim 6. Its characteristics are: The connecting arm (305) includes a body and an extension rod (306) threadedly connected to the body. Both the extension rod (306) and the end of the body have joints. The joints are connected to the limiting block (301) and the conduit (304) respectively by bolts.

9. A device for repairing the threaded conduit of a rail vehicle according to claim 1, characterized in that... ； The wrench is a ratchet wrench (102).

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