A high-speed motor train unit skirt locking spring breaking device

Abstract

This utility model discloses a device for breaking open the retaining spring of a high-speed train skirt lock, including a frame structure; a handle assembly that can rotate relative to the frame structure, and the handle assembly has a first handle protrusion extending into the frame structure; the handle assembly can move along the axial direction of the frame structure to drive the first handle protrusion into the skirt lock; the jaws of the retaining spring pliers can pass through the frame structure and extend into the skirt lock, and the jaws of the retaining spring pliers are connected to the retaining spring and drive the retaining spring to deform, thereby driving the retaining spring to contact both sides of the first handle protrusion and simultaneously driving the retaining spring to disengage from the groove of the bushing; the retaining spring is removed by the cooperation of the retaining spring pliers and the breaking device. The device of this utility model can break open the lock without damaging the skirt lock itself, thereby removing the lock cylinder, cleaning iron filings, smoothing scratches, replacing the retaining spring, and reassembling the skirt lock for continued use, reducing the scrap rate of skirt locks and improving economic efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of skirt lock disassembly for equipment cabin skirts of high-speed trains, and particularly to a device for breaking the snap ring of a skirt lock on a high-speed train. Background Technology

[0002] The skirt lock structure in the equipment compartment of the CRH380 EMU frequently experiences jamming during routine maintenance, preventing the skirt from locking or unlocking. Investigation revealed that during rotation, the cylindrical edge of the lock cylinder often scrapes against the inner surface of the bushing, generating metal filings. These filings enter the tiny gap between the cylindrical surface and the bushing, causing jamming. Currently, with existing technology, the only solution is to replace the entire skirt lock. However, these locks are imported and expensive; frequent jamming increases maintenance costs and labor time.

[0003] Meanwhile, since the threaded part of the stuck skirt lock is not damaged, it is still worth using. The jamming can be eliminated by removing the iron filings between the cylindrical surface of the lock cylinder and the inner surface of the bushing, and the skirt lock can continue to be used. However, because a retaining spring is installed, the lock cylinder cannot be removed from the bushing for processing. Therefore, the crux of the problem lies in the removal of the retaining spring. At present, the technology for installing retaining springs is relatively mature, and retaining springs can be purchased separately at low prices. However, for this kind of embedded retaining spring without ears with a small exposed area, there is not much information on the removal method.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a device for breaking the locking springs of high-speed train skirts. Utility Model Content

[0005] The purpose of this invention is to provide a device for breaking the retaining spring of a high-speed train skirt lock. This device can break the retaining spring without damaging the skirt lock itself, then remove the lock cylinder, clean the iron filings, smooth the scratches, replace the retaining spring, and reassemble the skirt lock for continued use, thereby reducing the scrap rate of skirt locks and improving economic efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a device for breaking the retaining spring of a high-speed train skirt lock. This device is used in conjunction with retaining spring pliers and an electric grinder to break the retaining spring inside the skirt lock. The device includes:

[0008] A frame structure that mates with the upper end face of the bushing of the skirt panel lock;

[0009] A handle assembly capable of rotating relative to the frame structure, and the handle assembly having a first handle protrusion extending into the interior of the frame structure;

[0010] The handle assembly is movable along the axial direction of the frame structure to drive the first handle protrusion into the interior of the skirt lock.

[0011] The clamp head of the snap ring pliers can pass through the frame structure and extend into the skirt lock. The clamp head of the snap ring pliers is connected to the snap ring and drives the snap ring to deform. The deformation of the snap ring drives the snap ring to contact both sides of the first handle protrusion and at the same time drives the snap ring to disengage from the bushing groove.

[0012] The snap ring is removed by the cooperation of the snap ring pliers and the breaking device.

[0013] Furthermore, the electric polishing pen is used to polish the inner wall of the retaining ring to process the retaining ring grooves located on both sides of the retaining ring opening;

[0014] The electric polishing pen is equipped with a rotating file with a diameter of 1 mm;

[0015] The total width of the retaining ring is 1.7 mm, and the width of the retaining ring outside the groove is 0.9 mm;

[0016] The depth of the retaining ring groove processed by the electric polishing pen through the rotary file is greater than 0.5 mm and less than 0.9 mm;

[0017] The clamps of the snap ring pliers can be inserted into the snap ring groove and engaged with the snap ring for positioning.

[0018] Furthermore, the frame structure includes a ring-shaped frame body and an arc-shaped plate formed on the upper part of the frame body;

[0019] One end of the arc-shaped plate extends to the center of the frame body, and this position has a mounting hole;

[0020] The central area of ​​the arc-shaped plate is machined with an arc-shaped cutout, and the pliers head of the snap ring clamp can pass through the arc-shaped cutout and extend into the skirt lock.

[0021] Furthermore, the handle assembly includes a first handle and a second handle;

[0022] The first handle is provided with a handle connecting rod at its end, and the second handle is rotatably connected to the first handle through the handle connecting rod. The handle connecting rod is connected to the mounting hole, and a spring is installed between the handle connecting rod and the arc plate.

[0023] The lower end of the handle connecting rod has an arc-shaped first handle protrusion, and both ends of the arc-shaped surface of the first handle protrusion are machined with sloping surfaces.

[0024] When the snap ring pliers drive the snap ring to retract and deform, the snap ring contacts the ramp surface at the corresponding position and drives the handle assembly to move along the axial direction of the frame structure through the ramp surface to extend into the skirt lock.

[0025] The second handle is fitted with a cylindrical pin.

[0026] The above technical solution provides a high-speed train skirt locking spring breaking device, which has the following beneficial effects:

[0027] The device of this invention can dismantle the retaining spring without damaging the skirt lock itself, then remove the lock cylinder, clean the iron filings, smooth the scratches, replace the retaining spring, and reassemble the skirt lock for continued use, reducing the scrap rate of skirt locks and improving economic efficiency. Attached Figure Description

[0028] 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0029] Figure 1 This is a schematic diagram of the structure of a high-speed train skirt locking spring breaking device disclosed in an embodiment of the present utility model;

[0030] Figure 2 This is an exploded view of the structure of a high-speed train skirt locking spring breaking device disclosed in an embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the structure of a high-speed train skirt lock snap ring breaking device installed on the upper end of the skirt lock according to an embodiment of the present utility model;

[0032] Figure 4 This is a schematic diagram of a high-speed train skirt lock snap ring breaking device and snap ring pliers, both of which are installed on the skirt lock according to an embodiment of the present utility model.

[0033] Figure 5 This is a schematic diagram showing the fit between the clamp head of the snap ring pliers and the snap ring groove when using a snap ring breaking device for a high-speed train skirt panel lock, as disclosed in an embodiment of this utility model.

[0034] Figure 6 This is a cross-sectional view of a high-speed train skirt lock spring breaking device and skirt lock operation disclosed in an embodiment of the present utility model;

[0035] Figure 7This is a schematic diagram of step S6 in the operation method of a high-speed train skirt locking spring breaking device disclosed in this embodiment of the present utility model, in which the handle is pressed down to drive the cylindrical pin into the corresponding space.

[0036] Figure 8 This is a schematic diagram of step S7 of the operation method of the high-speed train skirt lock spring breaking device disclosed in this embodiment of the present utility model, in which the first handle is rotated 180° and the tail of the spring is clamped by the cylindrical pin and the protrusion of the first handle.

[0037] Figure 9 This is a schematic diagram of the angle between the two points of contact between the retaining ring and the edge of the groove and the line connecting the center of the retaining ring in step S7 of the operation method of the high-speed train skirt lock retaining ring dismantling device disclosed in this embodiment of the utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100. Demolition device; 200. Skirt panel lock; 300. Spring clip button;

[0040] 210. Snap ring; 220. Bushing; 230. Space between the tail of the snap ring and the groove;

[0041] 211. Snap ring groove;

[0042] 310. Pliers head;

[0043] 1. Frame structure; 2. Handle assembly;

[0044] 101. Frame body; 102. Curved plate;

[0045] 10201, Curved section of the arc-shaped plate; 10202, Mounting hole;

[0046] 201. First handle; 202. Second handle; 203. Cylindrical pin; 204. Spring;

[0047] 20101, Handle connecting rod; 20102, First handle protrusion; 20103, Sloping surface. Detailed Implementation

[0048] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0049] See Figures 1 to 9 As shown;

[0050] This embodiment provides a high-speed train skirt lock retaining spring breaking device 100, which is used in conjunction with retaining spring pliers 300 and an electric grinder to break the retaining spring 210 inside the skirt lock 200. The breaking device 100 includes:

[0051] A frame structure 1 that mates with the upper end face of the bushing 220 of the skirt lock 200;

[0052] A handle assembly 2 that is rotatable relative to the frame structure 1, and the handle assembly 2 having a first handle protrusion 20102 extending into the interior of the frame structure 1;

[0053] The handle assembly 2 can move along the axial direction of the frame structure 1 to drive the first handle protrusion 20102 into the skirt lock 200.

[0054] The jaws 310 of the snap ring pliers 300 can pass through the frame structure 1 and extend into the skirt lock 200. The jaws 310 of the snap ring pliers 300 are connected to the snap ring 210 and drive the snap ring 210 to deform. Through the deformation of the snap ring 210, the snap ring 210 is driven to contact both sides of the first handle protrusion 20102 and at the same time, the snap ring 210 is driven to disengage from the groove of the bushing 220.

[0055] The snap ring 210 is removed by using snap ring pliers 300 and the breaking device 100.

[0056] Specifically, this embodiment discloses a breaking device 100 for use with a snap ring pliers 300 and an electric grinder in the prior art to break the snap ring 210 inside a skirt lock 200. First, the breaking device 100 of this embodiment includes a frame structure 1 and a handle assembly 2. The frame structure 1 is engaged with the end of the bushing 220 of the skirt lock 200, and the handle assembly 2 has a first handle protrusion 20102 that can extend into the bushing 220. At the same time, the snap ring pliers 300 of this embodiment are connected to the snap ring 210 and force the snap ring 210 to deform so that the snap ring 210 can be removed by the snap ring pliers 300 and the breaking device 100 working together.

[0057] Preferably, in order to enable the snap ring pliers 300 to engage with the snap ring 210, the snap ring 210 in this embodiment first needs to be polished with an electric grinder to process the snap ring groove 211 that engages with the pliers head 310 of the snap ring pliers 300. Specifically, the electric grinder in this embodiment is used to polish the inner wall of the snap ring 210 to process the snap ring groove 211 located on both sides of the snap ring opening.

[0058] The electric polishing pen in this embodiment is equipped with a rotating file with a diameter of 1 mm;

[0059] Based on the structure of the snap ring 210 of the skirt lock 200, the total width of the snap ring 210 in this embodiment is 1.7mm, and the width of the snap ring 210 outside the groove is 0.9mm. The snap ring groove 211, processed by a rotary file with an electric grinder, has a depth greater than 0.5mm and less than 0.9mm. The jaws 310 of the snap ring pliers 300 can be embedded in the snap ring groove 211 and engage with the snap ring 210. In this embodiment, the snap ring groove 211, ground by an electric grinder, will not damage the groove of the bushing 220. Since the jaws 310 are located between the first handle protrusion 20102 and the snap ring groove 211, the jaws 310 are simultaneously constrained by both the first handle protrusion 20102 and the snap ring groove 211. This ensures that the jaws 310 of the snap ring pliers 300 can stably engage with the snap ring groove 211 during the retraction of the snap ring 210, providing conditions for subsequent disassembly of the snap ring 210.

[0060] Preferably, the frame structure 1 of this embodiment includes a ring-shaped frame body 101 and an arc-shaped plate 102 formed on the upper part of the frame body 101; one end of the arc-shaped plate 102 extends to the center of the frame body 101, and the position has a mounting hole 10202; the middle region of the arc-shaped plate 102 has an arc-shaped plate cutout 10201, and the clamp head 310 of the snap ring clamp 300 can pass through the arc-shaped plate cutout 10201 and extend into the skirt lock 200.

[0061] Preferably, the handle assembly 2 in this embodiment is mounted on the arc plate 102 of the frame structure 1. Specifically, the handle assembly 2 in this embodiment includes a first handle 201 and a second handle 202.

[0062] In this embodiment, the first handle 201 is provided with a handle connecting rod 20101 at its end, and the second handle 202 is rotatably connected to the first handle 201 through the handle connecting rod 20101. The handle connecting rod 20101 is connected to the mounting hole 10202, and a spring 204 is installed between the handle connecting rod 20101 and the arc plate 102.

[0063] The lower end of the handle connecting rod 20101 has a first handle protrusion 20102 with an arc-shaped structure, and both ends of the arc-shaped surface of the first handle protrusion 20102 are machined with a ramp surface 20103; when the snap ring clamp 300 drives the snap ring 210 to retract and deform, the snap ring 210 contacts the ramp surface 20103 at the corresponding position and drives the handle assembly 2 to move along the axial direction of the frame structure 1 through the ramp surface 20103 to extend into the skirt lock 200; in addition, the second handle 202 in this embodiment is equipped with a cylindrical pin 203.

[0064] This utility model also discloses a method for breaking the locking spring of a high-speed train skirt panel, which is based on the aforementioned high-speed train skirt panel locking spring breaking device 100.

[0065] Furthermore, the main steps include:

[0066] S1. First, use an electric grinder to machine the retaining ring groove 211 at the designated position of the retaining ring 210;

[0067] S2. Install the demolition device 100 on the skirt lock 200. At this time, the cylindrical pin 203 does not enter the internal space of the bushing 220. Meanwhile, there is a 0.5mm gap between the inner surface of the snap ring 210 and the first handle protrusion 20102.

[0068] S3. Insert the pliers 310 of the snap ring pliers 300 into the bushing 220 of the skirt lock 200 and embed it into the snap ring groove 211. At this time, the pliers 310 is located between the first handle protrusion 20102 and the snap ring groove 211.

[0069] S4. Tighten the snap ring clamp 300 and drive the snap ring 210 to retract. At this time, the diameter of the snap ring 210 gradually decreases, and the snap ring 210 will contact the edge of the first handle protrusion 20102. The first handle protrusion 20102 is pressed down by the structure of the ramp surfaces 20103 at both ends of the first handle protrusion 20102. At this time, the first handle 201, the second handle 202 and the cylindrical pin 203 descend synchronously.

[0070] S5. When the retaining ring 210 is retracted to its limit, the tail of the retaining ring 210 disengages from the groove, and the cylindrical pin 203 is located above the space 230 between the tail of the retaining ring and the groove.

[0071] S6. Press down the handle assembly 2 to drive the cylindrical pin 203 into the space 230 between the tail of the retaining ring and the groove. At this time, the first handle protrusion 20102 descends to a position that is not in the same horizontal space as the retaining ring 210, and the retaining ring clamp 300 is removed. At this time, although the retaining ring 210 has a tendency to spring back, the tail is stuck by the cylindrical pin 203 and cannot spring back.

[0072] S7. Rotate the first handle 201 180°. At this time, the tail of the retaining ring 210 is clamped by the protrusion 20102 of the first handle and the cylindrical pin 203. At this time, the angle between the two points of contact between the retaining ring 210 and the edge of the groove and the line connecting the center of the retaining ring 210 is less than 180°. At this time, more than 50% of the retaining ring 210 has been dislodged from the groove. According to the mechanical properties, the retaining ring 210 can be easily removed by lifting the breaking device 100.

[0073] The dismantling device 100 of this embodiment is applicable to the dismantling of embedded earless small retaining rings. The first handle protrusion 20102 of its handle assembly 2 and the retaining ring pliers 300 work together to apply sufficient force to the retaining ring 210 to drive it to retract. During the dismantling of the retaining ring 210, the first handle protrusion 20102 and the cylindrical pin 203 jointly clamp and surround the tail of the retaining ring 210, so that the tail of the retaining ring will not come out when pulled. At the same time, in order to avoid interference between the retaining ring and the first handle protrusion 20102 during the retraction of the retaining ring 210, a ramp surface 20103 is designed on the edge of the first handle protrusion 20102. According to the mechanical characteristics, during the retraction of the retaining ring 210, the retaining ring 210 presses down on the first handle protrusion 20102 through the ramp surface 20103, thereby driving the cylindrical pin 203 to move downward to the position where it is about to enter the space 230 between the tail of the retaining ring and the groove. In this embodiment, the cylindrical pin 203 and the second handle 202 can be designed as separate units. The upper end of the cylindrical pin 203 is installed through the mounting groove machined in the second handle 202. Considering that the cylindrical pin 203 may be damaged or deformed after multiple disassemblies, only the cylindrical pin 203 needs to be replaced, without replacing the entire device, which facilitates the daily maintenance and repair of the device.

[0074] The above technical solution provides a high-speed train skirt locking spring breaking device and its usage method, which has the following beneficial effects:

[0075] The device of this utility model can dismantle the snap ring without damaging the skirt lock 200 itself, then remove the lock cylinder, clean the iron filings, smooth the scratches, replace the snap ring 210, and reassemble the skirt lock for continued use, thereby reducing the scrap rate of the skirt lock 200 and improving economic efficiency.

[0076] The foregoing description only illustrates certain exemplary embodiments of the present invention. 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 above 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 breaking the locking spring of a high-speed train skirt panel, characterized in that, The breaking device (100) is used in conjunction with snap ring pliers (300) and a grinder to break the snap ring (210) inside the skirt panel lock (200). The breaking device (100) includes: A frame structure (1) that mates with the upper end face of the bushing (220) of the skirt lock (200); A handle assembly (2) capable of rotating relative to the frame structure (1), and the handle assembly (2) having a first handle protrusion (20102) extending into the interior of the frame structure (1). The handle assembly (2) is capable of moving along the axial direction of the frame structure (1) to drive the first handle protrusion (20102) into the interior of the skirt lock (200); The jaws (310) of the snap ring pliers (300) can pass through the frame structure (1) and extend into the skirt lock (200). The jaws (310) of the snap ring pliers (300) are connected to the snap ring (210) and drive the snap ring (210) to deform. The deformation of the snap ring (210) drives the snap ring (210) to contact both sides of the first handle protrusion (20102) and at the same time drives the snap ring (210) to disengage from the groove of the bushing (220). The snap ring (210) is removed by the cooperation of the snap ring pliers (300) and the breaking device (100).

2. The high-speed train skirt locking spring breaking device according to claim 1, characterized in that, The electric polishing pen is used to polish the inner wall of the retaining ring (210) to process the retaining ring grooves (211) located on both sides of the retaining ring opening. The electric polishing pen is equipped with a rotating file with a diameter of 1 mm; The total width of the retaining ring (210) is 1.7 mm, and the width of the retaining ring (210) outside the groove is 0.9 mm; The depth of the retaining ring groove (211) processed by the electric polishing pen through the rotary file is greater than 0.5 mm and less than 0.9 mm; The pliers (310) of the snap ring pliers (300) can be inserted into the snap ring groove (211) and engage with the snap ring for positioning.

3. The high-speed train skirt locking spring breaking device according to claim 1, characterized in that, The frame structure (1) includes a ring-shaped frame body (101) and an arc-shaped plate (102) formed on the upper part of the frame body (101). One end of the arc-shaped plate (102) extends to the center of the frame body (101), and the position has a mounting hole (10202). The arc-shaped plate (102) has an arc-shaped plate cutout (10201) processed in the middle area, and the clamp head (310) of the snap ring clamp (300) can pass through the arc-shaped plate cutout (10201) and extend into the skirt lock (200).

4. The high-speed train skirt locking spring breaking device according to claim 3, characterized in that, The handle assembly (2) includes a first handle (201) and a second handle (202); The first handle (201) is provided with a handle connecting rod (20101) at its end, and the second handle (202) is rotatably connected to the first handle (201) through the handle connecting rod (20101). The handle connecting rod (20101) is connected to the mounting hole (10202), and a spring (204) is installed between the handle connecting rod (20101) and the arc plate (102). The lower end of the handle connecting rod (20101) has a first handle protrusion (20102) with an arc structure, and both ends of the arc surface of the first handle protrusion (20102) are machined with slope surfaces (20103). When the snap ring clamp (300) drives the snap ring (210) to retract and deform, the snap ring (210) contacts the ramp surface (20103) at the corresponding position and drives the handle assembly (2) to move along the axial direction of the frame structure (1) through the ramp surface (20103) to extend into the skirt lock (200); The second handle (202) is fitted with a cylindrical pin (203).

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