Shaping device for double-row wires after single-edge cutting

Abstract

The utility model belongs to the technical field of gear switch forming equipment, and particularly relates to a shaping device after single-side cutting of double-row wires, which comprises an upper shaping die and a lower shaping die, and the output end of the upper shaping die is provided with a shaping groove for normalizing the cutting position of the double-row wires; the shaping lower die is arranged below the shaping upper die and used for abutting against the output end of the shaping upper die. Wherein the shaping upper die and the shaping lower die can be closed, so that the cut-off position of the double-row wire in the shaping groove is deformed along a preset path, and the shaping groove and the shaping lower die form a shaping cavity for accommodating the cut-off position of the double-row wire. And the rapid mold closing action of the upper mold and the lower mold can replace the procedures of manual bending, positioning and the like, so that the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gear switch forming equipment technical field especially relates to a double -row wire single -edge cutting after shaping device. BACKGROUND

[0002] In gear switch manufacturing, the shaping process of double-row hard wire has the following technical defects:

[0003] Hard wire (such as copper aluminum composite material) needs to be adapted to the shape of the shell through bending, pressing and other processes, but manual operation is difficult to control the uniformity of force, which can easily lead to scratches, microcracks or size deviation on the surface of the wire, affecting the fitting accuracy with the gear contact. For example, aluminum wire is low in hardness and easy to oxidize, and the contact resistance may increase due to the residual surface oxide layer when pressed manually.

[0004] Hard wire (such as copper wire) is prone to stress concentration due to high hardness and poor ductility when bent manually, which can cause damage to the insulation layer or internal microcracks, reducing electrical reliability. In addition, the rebound effect of hard materials is significant, and the gap between the wire and the shell after manual shaping is difficult to control stably, affecting the stability of the switch under complex working conditions.

[0005] The existing technology relies on manual sampling of wire size and electrical performance, with a high risk of missed detection. For example, uneven thickness of the insulation layer of hard wire or excessive contact resistance can cause short circuit, and the traditional process cannot monitor and feedback correction in real time.

[0006] In summary, the quality of the gear switch of the prior art is affected by the shaping effect of the wire, and the traditional manual operation for wire shaping is low in efficiency and poor in shaping effect, which affects the overall quality of the gear switch, and needs to be improved. INVENTION CONTENTS

[0007] The utility model aims at providing a double -row wire single -edge cutting after shaping device, which aims at solving the technical problem that the quality of the gear switch of the prior art is affected by the shaping effect of the wire, and the traditional manual operation for wire shaping is low in efficiency and poor in shaping effect, which affects the overall quality of the gear switch.

[0008] To achieve the above-mentioned purpose, the utility model embodiment provides a double -row wire single -edge cutting after shaping device, which comprises a shaping upper die and a shaping lower die, the output end of the shaping upper die is provided with a shaping groove for shaping the cutting position of the double-row wire; The shaping lower die is arranged below the shaping upper die and is used for abutting the output end of the shaping upper die; wherein the shaping upper die and the shaping lower die can be closed, so that the cutting position of the double-row wire located in the shaping groove is deformed along the preset path, and the shaping groove and the shaping lower die form a shaping cavity for accommodating the cutting position of the double-row wire.

[0009] Optionally, the shaping upper die comprises a mounting plate, a driving member, a shaping cutter head and a shaping block, the driving member is fixedly arranged on the mounting plate, the shaping block is fixedly arranged on the mounting plate and located on the driving path of the driving member, the shaping cutter head is slidingly connected to the shaping block, both ends of the shaping cutter head extend to the outside of the shaping block, one end of the shaping cutter head is fixedly connected to the output end of the driving member, the other end of the shaping cutter head is arranged in a pyramid cutter head structure, and the shaping groove is formed in the shaping block.

[0010] Optionally, the moving path of the shaping cutter head passes through the shaping groove, and the shaping cutter head can separate and tightly fit the double-row wires located in the shaping groove.

[0011] Optionally, the shaping cutter head comprises a connecting part, a ridge rod and a separation cutter tip, the connecting part, the ridge rod and the separation cutter tip are sequentially distributed in a linear direction, the connecting part, the ridge rod and the separation cutter tip are integrally formed by casting from a metal material, the connecting part is connected to the output end of the driving member, the ridge rod is slidingly connected to the shaping block, the separation cutter tip is formed at one end of the ridge rod away from the connecting part, the separation cutter tip is arranged in a tapered structure, the end of the separation cutter tip away from the ridge rod is gradually narrowed, and the ridge rod is adapted to the target shape of the double-row wires.

[0012] Optionally, the end of the separation cutter tip is arranged in a straight blade structure, the tip of the separation cutter tip is aligned with the middle position of the shaping groove, and the separation cutter tip is pushed by the ridge rod to act on the centerline position of the double-row wires in the shaping groove.

[0013] Optionally, the driving member is a driving cylinder, the output end of the driving member is provided with a connecting block, one end of the connecting block is fixedly connected to the output spindle of the driving member, the other end of the connecting block is provided with a connecting protrusion, the connecting part near the end of the driving member is provided with a connecting clamping groove for clamping and adapting the connecting protrusion, the connecting clamping groove penetrates the connecting part from the side wall of the connecting part, and the connecting part can be clamped on the connecting protrusion from the side through the connecting clamping groove.

[0014] Optionally, the shaping lower die comprises a base, a limiting seat and an elastic assembly, the base is provided with a mounting sliding groove, the limiting seat is arranged at the end of the mounting sliding groove, and the elastic assembly is slidingly connected in the mounting sliding groove; when the output end of the shaping upper die moves to the base, the output end of the shaping upper die enters the mounting sliding groove first and abuts against the elastic assembly, the output end of the shaping upper die can drive the elastic assembly to move along the length direction of the mounting sliding groove, and the elastic assembly always abuts against the output end of the shaping upper die during the movement.

[0015] Optionally, the mounting sliding groove penetrates the base from the side wall of the base towards the end of the shaping upper die, the limiting seat is two groups, and the two groups of limiting seats are fixedly installed on the two sides of the mounting sliding groove, respectively, and the elastic assembly is slidingly connected between the two groups of limiting seats.

[0016] Optionally, the elastic assembly comprises two groups of symmetrically arranged elastic parts, the elastic driving directions of the two groups of elastic parts are always opposite to each other, the middle positions of the two groups of elastic parts are arranged in alignment with the output end of the shaping upper die, when the output end of the shaping upper die moves into the mounting sliding groove, the output end of the shaping upper die enters between the two groups of elastic parts and can overcome the two groups of elastic parts to move along the mounting sliding groove, and during the movement, the two groups of elastic parts always abut against the output end of the shaping upper die and the bottom of the deformed part of the double-row lead wire.

[0017] Optionally, the elastic part comprises a sliding block and a compression spring, the sliding block is slidingly connected in the mounting sliding groove, and the two ends of the compression spring are connected with the sliding block and the side wall of the limiting seat, respectively.

[0018] The double-row wire single-edge cutting and shaping device provided by the embodiment of the utility model has at least one of the following technical effects: the cutting position of the double-row wire is strictly limited in the preset deformation path through the closed cavity formed by the shaping groove of the shaping upper die and the lower die, the size deviation caused by manual operation is avoided, compared with the gear switch in the prior art, the quality of the gear switch is affected by the wire shaping effect, the efficiency of the traditional manual operation for wire shaping is low, the shaping effect is poor, the overall quality of the gear switch is affected, the cavity structure of the shaping mechanism provided by the embodiment of the utility model can inhibit material rebound through multi-point constraint on the wire, ensures the adaptability of the wire and the shell shape after shaping, and significantly improves the matching reliability of the gear contact. The guiding effect of the shaping groove makes the wire deformation process uniform in stress, reduces the surface scratches or micro cracks caused by local stress concentration of the hard wire, thereby reducing the contact resistance fluctuation. At the same time, the mold closing pressure is transmitted through the rigidity of the mold, avoiding the insulation layer crushing or breaking caused by uneven manual force. The rapid mold closing action of the shaping upper die and the lower die can replace the manual bending, positioning and other processes, and the efficiency is improved. In addition, the cavity structure can be compatible with multiple specifications of wire switching, and the cost of changing type is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor intensity.

[0020] Figure 1 The section view of the double-row wire single-edge cutting and shaping device provided by the embodiment of the utility model.

[0021] Figure 2 For Figure 1 The shaping action schematic view of the double-row wire single-edge cutting and shaping device in the embodiment of the utility model.

[0022] Figure 3 The structure schematic view of the shaping upper die provided by the embodiment of the utility model.

[0023] Figure 4 The structure schematic view of the shaping block provided by the embodiment of the utility model.

[0024] Figure 5 The structure schematic view of the shaping lower die provided by the embodiment of the utility model.

[0025] Figure 6 The top view of the shaping lower die provided by the embodiment of the utility model.

[0026] In the drawings, various reference signs are used.

[0027] 100 - shaping upper die 200 - shaping lower die 300 - shaping groove

[0028] 110 - mounting plate 120 - driving member 130 - shaping tool bit

[0029] 140 - shaping block 131 - connecting portion 132 - prismatic rod

[0030] 133 - separating tool tip 121 - connecting block 210 - base

[0031] 220 - limiting seat 230 - elastic assembly 211 - mounting sliding groove

[0032] 231 - elastic portion. DETAILED DESCRIPTION

[0033] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The following will be described by referring to the accompanying drawings. Figures 1-6 The described embodiments are exemplary, and are intended to be illustrative of embodiments of the present application, and are not to be construed as limiting the present application.

[0034] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the embodiments of the present application and simplify the description, and therefore cannot be construed as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0035] In addition, the terms "first", "second" are used only for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0036] In the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] In one embodiment of the present application, as shown in Figures 1-6 The output end of the shaping upper die 100 is provided with a shaping groove 300 for shaping the cut position of the double-row wire; the shaping lower die 200 is arranged below the shaping upper die 100 and is used for abutting against the output end of the shaping upper die 100; wherein the shaping upper die 100 and the shaping lower die 200 can be closed to make the cut position of the double-row wire located in the shaping groove 300 deform along a preset path, and the shaping groove 300 and the shaping lower die 200 form a shaping cavity for accommodating the cut position of the double-row wire.

[0038] In the present embodiment, the shaping upper die 100 is arranged on an external driving structure, and under the driving action of the external driving structure, the shaping upper die 100 and the shaping lower die 200 can be closed to make the output end of the shaping upper die 100 abut against the shaping lower die 200.

[0039] Specifically, the cut position of the double-row wire is strictly limited in the preset deformation path through the closed cavity formed by the shaping groove 300 of the shaping upper die 100 and the lower die, avoiding the size deviation caused by manual operation. Compared with the gear switch in the prior art, the quality of the gear switch is affected by the wire shaping effect, and the traditional manual operation has low efficiency and poor shaping effect, which affects the overall quality of the gear switch. The cavity structure of the shaping mechanism provided in the embodiments of the present application can suppress material rebound through multi-point constraint of the wire, ensure the adaptation of the shaped wire and the shell shape, and significantly improve the cooperation reliability of the gear contact. The guiding effect of the shaping groove 300 makes the wire deformation process uniform in stress, reduces the surface scratches or micro-cracks caused by local stress concentration of hard wires, and thus reduces the contact resistance fluctuation. At the same time, the closing pressure is transmitted through the rigidity of the mold, avoiding the insulation layer crushing or breaking caused by uneven manual force. The rapid closing action of the shaping upper die 100 and the lower die can replace the manual bending, positioning and other processes, and the efficiency is improved. In addition, the cavity structure can be compatible with multiple specifications of wire switching, reducing the cost of changing type.

[0040] AsFigures 1-6 As shown in the other embodiment of the utility model, the shaping upper die 100 includes mounting plate 110, driving part 120, shaping cutter head 130 and shaping block 140, the driving part 120 is fixedly arranged on the mounting plate 110, the shaping block 140 is fixedly arranged on the mounting plate 110 and is located on the driving path of the driving part 120, the shaping cutter head 130 is slidably connected on the shaping block 140, both ends of the shaping cutter head 130 extend to the outside of the shaping block 140, one end of the shaping cutter head 130 is fixedly connected with the output end of the driving part 120, the other end of the shaping cutter head 130 is in the form of pyramid cutter head structure, and the shaping groove 300 is formed on the shaping block 140. In this embodiment, the cross-sectional shape of the shaping cutter head 130 is the same as the target shape of the double-row wire cutting position to be shaped.

[0041] As shown in the other embodiment of the utility model, Figures 1-6 As shown in the other embodiment of the utility model, the moving path of the shaping cutter head 130 passes through the shaping groove 300, and the shaping cutter head 130 can separate the double-row wire in the shaping groove 300 and tightly adhere in the shaping groove 300. Specifically, in the shaping process, the shaping cutter head 130 first contacts the middle of the double-row wire cutting position, that is, the shaping cutter head 130 abuts between the two groups of wires, one group of wires is complete wire, and the other group of wires is partially cut wire. After the shaping cutter head 130 contacts the middle position of the double-row wire, the shaping cutter head 130 can drive the double-row wire to move together in the driving direction under the continuous driving of the driving part 120 until the wire abuts against the shaping lower die 200 and is limited by the shaping lower die 200 and cannot continue to move. At this time, the shaping cutter head 130 continues to move and can press the double-row wire to the inner wall direction of the shaping groove 300.

[0042] As shown in the other embodiment of the utility model, Figures 1-6As shown in another embodiment of the utility model, the shaping cutter head 130 includes connecting part 131, edge rod 132 and separate cutter tip 133, the connecting part 131, the edge rod 132 and the separate cutter tip 133 are sequentially distributed along the linear direction, the connecting part 131, the edge rod 132 and the separate cutter tip 133 are integrally formed by casting from metal material, the connecting part 131 is connected with the output end of the driving part 120, the edge rod 132 is slidingly connected with the shaping block 140, the separate cutter tip 133 is formed on the end of the edge rod 132 away from the connecting part 131, the separate cutter tip 133 is provided in the shape of a cone, the end of the separate cutter tip 133 away from the edge rod 132 is gradually narrowed, and the edge rod 132 is adapted to the target shape of the double-row wire. In this embodiment, the cross-sectional shape of the edge rod 132 is the same as the target shape of the double-row wire to be shaped at the cutting position, when the entire part of the separate cutter tip 133 passes through the middle position of the double-row wire and enters the shaping lower die 200, the edge rod 132 continues to abut against the double-row wire and drives the double-row wire to deform towards the inner wall of the shaping groove 300.

[0043] As Figures 1-6 shown in another embodiment of the utility model, the end of the separate cutter tip 133 is provided in the shape of a straight blade, the tip of the separate cutter tip 133 is aligned with the middle position of the shaping groove 300, and the separate cutter tip 133 is pushed by the edge rod 132 to act on the middle line position of the double-row wire in the shaping groove 300. Specifically, the length of the blade of the separate cutter tip 133 is greater than the length of the cut part of the double-row wire, and when the separate cutter tip 133 contacts the middle position of the double-row wire, the separate cutter tip 133 can cut the double-row wire along the middle line position, so that the ends of the cut part of the single-sided wire can form wire segments that can freely deform.

[0044] As Figures 1-6 shown in another embodiment of the utility model, the driving part 120 is a driving cylinder, the output end of the driving part 120 is provided with a connecting block 121, one end of the connecting block 121 is fixedly connected with the output spindle of the driving part 120, the other end of the connecting block 121 is provided with a connecting protrusion, the end of the connecting part 131 close to the driving part 120 is provided with a connecting clamping groove for clamping and adapting the connecting protrusion, wherein the connecting clamping groove penetrates the connecting part 131 from the side wall of the connecting part 131, and the connecting part 131 can be clamped on the connecting protrusion from the side through the connecting clamping groove. Specifically, the shaping block 140 is screwed and locked on the mounting plate 110 by a pre-tightening screw, when it is necessary to replace the wire type, an operator can directly disassemble and lock the screw of the shaping block 140, and integrally disassemble the shaping block 140 and the shaping cutter head 130 from the side to the connecting protrusion, so that the shaping block 140 and the shaping cutter head 130 can be conveniently disassembled and assembled.

[0045] As Figures 1-6 shown, in another embodiment of the utility model, the shaping lower die 200 including base 210, limiting seat 220 and elastic component 230, the base 210 on be provided with installation sliding slot 211, limiting seat 220 set up in the end of installation sliding slot 211, elastic component 230 slidingly connected in installation sliding slot 211, when the output end of shaping upper die 100 moves to the base 210, the output end of shaping upper die 100 first enters in installation sliding slot 211 and with elastic component 230 abuts, the output end of shaping upper die 100 can drive elastic component 230, make elastic component 230 along the length direction of installation sliding slot 211 moves, elastic component 230 always keeps close abutment state with the output end of shaping upper die 100 in the moving process. Specifically, after closing, elastic component 230 as the bottom wall of shaping cavity and moves with the drive of separating knife tip 133, in the shaping process, the deformation part of double-row wire always abuts with elastic component 230, and then effectively prevents the deformation part of double-row wire from offsetting to the direction of shaping lower die 200 with the extrusion of shaping cutter head 130, ensures that double-row wire can be deformed into the same structure with the target shape structure.

[0046] As Figures 1-6 shown, in another embodiment of the utility model, the installation sliding slot 211 from the side wall of base 210 penetrates base 210 towards the end of shaping upper die 100, the number of limiting seat 220 is two groups, two groups of limiting seat 220 are fixedly installed on the two sides of installation sliding slot 211, and elastic component 230 is slidingly connected between two groups of limiting seat 220.

[0047] As Figures 1-6 shown, in another embodiment of the utility model, the elastic component 230 includes two groups of symmetrically arranged elastic parts 231, the elastic driving direction of two groups of elastic parts 231 always opposes each other, the middle position of two groups of elastic parts 231 is aligned with the output end of shaping upper die 100, when the output end of shaping upper die 100 moves to the installation sliding slot, the output end of shaping upper die 100 enters between two groups of elastic parts 231 and can overcome two groups of elastic parts 231 and move along installation sliding slot 211, and in the moving process, two groups of elastic parts 231 always abut with the output end of shaping upper die 100 and the bottom of the deformation part of double-row wire. Two groups of elastic parts 231 can make two deformation parts of double-row wire always abut with corresponding elastic parts 231, realize sufficient close abutment, and improve the shaping effect.

[0048] As Figures 1-6As shown in another embodiment of the utility model, the elastic part 231 includes a sliding block and a compression spring, the sliding block is slidingly connected in the mounting sliding groove 211, and the two ends of the compression spring are respectively connected with the sliding block and the side wall of the limiting seat 220.

[0049] The above merely describes the preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A double-row wire rod single-edge cutting and shaping device, characterized by, The shaping upper die is provided with a shaping groove for shaping the double-row wire cutting position at the output end. The shaping lower die is arranged below the shaping upper die and abuts against the output end of the shaping upper die. The shaping upper die and the shaping lower die can be closed to deform the double-row wire cutting position in the shaping groove along a preset path, and the shaping groove and the shaping lower die form a shaping cavity for accommodating the double-row wire cutting position. The shaping upper die comprises a mounting plate, a driving member, a shaping tool bit and a shaping block.

2. The double-row wire rod single-edge cutting and shaping device according to claim 1, characterized in that: The driving member is fixedly arranged on the mounting plate.

3. The double-row wire rod single-edge cutting and shaping device according to claim 2, characterized in that: The shaping block is fixedly arranged on the mounting plate and located on the driving path of the driving member.

4. The double-row wire rod single-edge cutting and shaping device according to claim 3, characterized in that: The shaping tool bit is slidably connected to the shaping block.

5. The double-row wire rod single-edge cutting and shaping device according to claim 4, characterized in that: The shaping tool bit is fixedly connected to the output end of the driving member.

6. The double-row wire rod single-edge cutting and shaping device according to claim 4, characterized in that: The other end of the shaping tool bit is in the form of a pyramid tool bit. The shaping groove is formed on the shaping block. The moving path of the shaping tool bit passes through the shaping groove. The shaping tool bit can separate the double-row wires in the shaping groove and tightly fit in the shaping groove. The shaping tool bit comprises a connecting part, a prismatic rod and a separating blade tip. The connecting part, the prismatic rod and the separating blade tip are sequentially arranged in a linear direction. The connecting part, the prismatic rod and the separating blade tip are integrally formed by casting from a metal material. The connecting part is connected to the output end of the driving member. The prismatic rod is slidably connected to the shaping block. The separating blade tip is formed at the end of the prismatic rod away from the connecting part. The separating blade tip is in the form of a taper structure. The end of the separating blade tip is in the form of a straight blade structure. The tip of the separating blade tip is aligned with the middle position of the shaping groove. The separating blade tip can act on the centerline position of the double-row wires in the shaping groove through the prismatic rod. The driving member is a driving cylinder. The output end of the driving member is provided with a connecting block. One end of the connecting block is fixedly connected to the output shaft of the driving member. The other end of the connecting block is provided with a connecting protrusion. The connecting part is provided with a connecting clamping groove for clamping and adapting the connecting protrusion. The connecting clamping groove penetrates the connecting part from the side wall of the connecting part. The connecting part can be clamped on the connecting protrusion from the side through the connecting clamping groove.

7. The double-row wire rod single-edge cutting and shaping device according to claim 1, characterized in that: The shaping lower die comprises a base, limiting seats and elastic components, the base is provided with a mounting sliding groove, the limiting seats are arranged at the ends of the mounting sliding groove, and the elastic components are slidingly connected in the mounting sliding groove; when the output end of the shaping upper die moves to the base, the output end of the shaping upper die enters the mounting sliding groove first and abuts against the elastic components, the output end of the shaping upper die can drive the elastic components to move along the length direction of the mounting sliding groove, and the elastic components always abut against the output end of the shaping upper die during the movement.

8. The double-row wire rod single-edge cutting and shaping device according to claim 7, characterized in that: The mounting sliding groove penetrates the base from the side wall of the base towards the end of the shaping upper die, the limiting seats are two groups, the two groups of limiting seats are fixedly arranged on the two sides of the mounting sliding groove respectively, and the elastic components are slidingly connected between the two groups of limiting seats.

9. The double-row wire rod single-edge cutting and shaping device according to claim 8, characterized in that: The elastic components comprise two groups of symmetrically arranged elastic parts, the elastic driving directions of the two groups of elastic parts are always opposite to each other, the middle positions of the two groups of elastic parts are arranged in alignment with the output end of the shaping upper die, when the output end of the shaping upper die moves into the mounting sliding groove, the output end of the shaping upper die enters between the two groups of elastic parts and can overcome the two groups of elastic parts to move along the mounting sliding groove, and during the movement, the two groups of elastic parts always abut against the output end of the shaping upper die and the deformed part of the double-row lead wire.

10. The double-row wire rod single-edge cutting and shaping device according to claim 9, characterized in that: The elastic part comprises a sliding block and a compression spring, the sliding block is slidingly connected in the mounting sliding groove, and the two ends of the compression spring are connected with the sliding block and the side wall of the limiting seat respectively.

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