Vehicle suspension system with protection function

Abstract

The invention discloses a vehicle suspension system with a protection function, and relates to the technical field of vehicle suspensions. The device comprises a cross beam, a supporting sliding frame, a hub supporting table, an outer side hub, an inner side hub, a supporting blade spring and a differential mechanism transmission mechanism. According to the system, the outer side hub and the inner side hub are always attached to the road surface through double-wheel independent vertical movement and an elastic compensation structure, and damage caused by single-wheel pressure bearing is avoided; the orthogonal sliding fit of the transmission sliding disc is adopted, so that the continuous transmission of power is ensured when the hubs are staggered; through cooperative control of the magnetic axis type linear motor and the locking electromagnet, the adjustable wheel tread and the rear wheel auxiliary steering function are achieved. The suspension system can effectively improve the bearing capacity, impact resistance and driving stability of the vehicle, and is suitable for complex road conditions and heavy-load transportation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle suspension, in particular to a vehicle suspension system with protection function. BACKGROUND

[0002] In the existing vehicle suspension and wheel arrangement structure, single wheel or fixed coaxial double wheel support mode is usually adopted. When the vehicle is running on uneven road, if the road protrusion is located below one side of the wheel, the other wheel on the same side may be suspended, resulting in that the suspended wheel completely loses the supporting effect, and the weight of the vehicle is instantaneously concentrated on the single wheel hub. This condition not only increases the risk of tire burst and wheel hub damage, but also significantly reduces the stability and safety of the vehicle. In addition, the wheel track of the traditional vehicle is generally a fixed value, and when facing different transportation conditions (such as high gravity goods transportation), the wheel track cannot be flexibly adjusted, resulting in insufficient vehicle rollover resistance. The steering function of the rear wheel is not realized in most vehicles, which makes the vehicle poor in maneuverability when turning, especially in narrow road sections or when carrying heavy loads, which is difficult to operate and has high risk. SUMMARY

[0003] In order to overcome the defects of the prior art, the present application provides the following technical scheme: a vehicle suspension system with protection function, comprising a cross beam, a lower surface of the cross beam is fixedly provided with two parallel sliding rails, the cross beam is slidably installed with two symmetrical support sliding frames through the two sliding rails; the distance between the two support sliding frames can be adjusted, and a wheel hub support table is rotatably installed on each support sliding frame; a lower surface of the wheel hub support table is rotatably installed with an outer side wheel hub and an inner side wheel hub, the outer side wheel hub and the inner side wheel hub are respectively rotatably installed on two wheel hub support frames, the two wheel hub support frames can independently move vertically, so as to make the outer side wheel hub and the inner side wheel hub always in contact with the road surface; wherein a lower surface of the wheel hub support table is elastically installed with two support leaf springs, the two support leaf springs are elastically matched with the two wheel hub support frames, for absorbing the impact force transmitted to the outer side wheel hub and the inner side wheel hub by the road surface.

[0004] Preferably, an upper surface of the wheel hub support table is fixedly installed with a wheel hub support table rotating seat, the wheel hub support table rotating seat is rotatably installed on the support sliding frame; and a magnetic shaft type linear motor is fixedly installed on each support sliding frame, an actuating rod end of the magnetic shaft type linear motor is movably connected with the wheel hub support table through an adjusting connecting rod, for driving the wheel hub support table to swing on the support sliding frame.

[0005] Preferably, four support sliding rods are fixedly installed on each wheel hub support frame, all the support sliding rods are slidably installed on the wheel hub support table, and the axis of the support sliding rod is arranged vertically to the upper surface of the wheel hub support table, a limiting sleeve ring is fixedly sleeved on the top end of each support sliding rod, for preventing the support sliding rod from separating from the wheel hub support table.

[0006] Preferably, the upper surface of each hub support frame is fixedly provided with a support protrusion, which is in contact with the corresponding support vane spring.

[0007] Preferably, the outer side transmission sliding disc and the inner side transmission sliding disc are respectively rotatably installed on the corresponding two hub support frames on the hub support table, the outer side transmission sliding disc is fixedly and synchronously rotated with the outer side hub through an outer side rotating shaft, the inner side transmission sliding disc is fixedly and synchronously rotated with the inner side hub through an inner side rotating shaft, and the outer side transmission sliding disc and the inner side transmission sliding disc are transmissionally matched through an intermediate transmission sliding disc; the inner side transmission sliding disc and the intermediate transmission sliding disc are slidably matched along the radial direction of the inner side transmission sliding disc, the intermediate transmission sliding disc and the outer side transmission sliding disc are slidably matched along the radial direction of the intermediate transmission sliding disc, and the sliding directions of the inner side transmission sliding disc and the intermediate transmission sliding disc and the sliding directions of the outer side transmission sliding disc and the intermediate transmission sliding disc are vertically arranged.

[0008] Preferably, the central frame is fixedly installed on the middle part of the cross beam, the differential mechanism is fixedly installed on the central frame, the driving gears are fixedly installed on the two output shafts of the differential mechanism, the driven gears are in circumferential surface meshing transmission with the driving gears, the driving gears and the driven gears are rotatably installed on the central frame, the shaft center positions of the driven gears are inserted with the spline shafts in a spline sliding matching mode, one end of each spline shaft is fixedly installed with a first universal joint, one end of the inner side rotating shaft away from the inner side transmission sliding disc is fixedly installed with a second universal joint, and the second universal joint and the first universal joint are transmissionally connected through the connecting shaft.

[0009] Preferably, the cross beam is further provided with two symmetrically arranged locking electromagnet sliding grooves, each locking electromagnet sliding groove is slidably installed with a locking electromagnet, the locking electromagnet is in contact with the upper surface of the support sliding frame, and the locking electromagnet and the opposite surface of the support sliding frame are provided with teeth capable of being mutually meshed and clamped.

[0010] Preferably, the locking electromagnet is fixedly installed with two parallel locking electromagnet guide rods, the locking electromagnet guide rods are slidably installed on the locking electromagnet fixing frame, the locking electromagnet fixing frame is fixedly installed on the cross beam, the locking electromagnet fixing frame is magnetically matched with the locking electromagnet, and the locking electromagnet guide rods are circumferentially sleeved with the locking electromagnet extrusion springs, and the two ends of each locking electromagnet extrusion spring are fixedly matched with the locking electromagnet fixing frame and the locking electromagnet respectively.

[0011] Compared with the prior art, the present application has the following beneficial effects: (1) When the traditional double-wheel vehicle encounters a road bump, the wheel hub on one side is often suspended in the air, so that the wheel hub on the other side bears the entire load, which easily leads to tire burst or wheel hub damage. The present application keeps the outer wheel hub and the inner wheel hub in contact with the road surface at all times, compensates the load between the two wheel hubs by the elasticity of the support leaf spring, effectively avoids the risk of single-point overload, and significantly improves the overall load capacity and operation reliability of the vehicle; (2) When the vehicle is running at high speed or transporting heavy loads, the road impact will directly act on the wheel hub and the suspension system. In the prior art, due to rigid transmission, the vehicle vibrates greatly and is easily damaged. The present application sets the support leaf spring between the wheel hub support frame and the wheel hub support table, can effectively absorb the road impact force, reduce the transmission of impact energy to the vehicle body and goods, and thus improve the driving comfort and structural durability, and is particularly suitable for use in heavy loads or complex road conditions; (3) In the traditional structure, when the wheel hub is radially misaligned due to uneven road surface, it often causes the transmission system to be blocked or even interrupted. The present application compensates for the misalignment between the wheel hubs through the orthogonal sliding fit between the outer transmission sliding disc, the middle transmission sliding disc and the inner transmission sliding disc, maintains the continuity and stability of the transmission, enables the power to be transmitted to the two wheel hubs without interruption, and thus improves the driving efficiency and the off-road adaptability of the vehicle; (4) The present application arranges a magnetic shaft type linear motor on the support sliding frame, drives the wheel hub support table to swing through adjusting the connecting rod, and realizes the adjustment of the wheel track of the vehicle before driving by cooperating with the control of the locking electromagnet. When the vehicle has a high center of gravity, the wheel track on both sides can be appropriately increased to enhance the lateral stability of the vehicle and prevent rollover accidents. At the same time, this function can also flexibly change the running posture of the vehicle to adapt to different working conditions; (5) In a conventional vehicle, the rear wheels only have supporting and driving functions and cannot participate in steering, so the vehicle has difficulty in turning in narrow sections or under heavy load. The present application can realize independent swinging of the wheel hub support tables on both sides by independently controlling the magnetic shaft type linear motors on both sides, so that the outer wheel hub and the inner wheel hub deflect towards the same side to achieve the effect of auxiliary steering of the rear wheels. This not only reduces the turning radius, but also improves the handling performance and passing capacity of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present application.

[0013] Figure 2 is an installation position diagram of the central frame of the present application.

[0014] Figure 3 is a schematic diagram of the structure at point A in the present application Figure 2

[0015] Figure 4 is a schematic diagram of the structure at the wheel hub support table rotating seat of the present application.

[0016] Figure 5 ​Structure diagram of the support slide rod in the application. Figure 4 Structure diagram of the support slide rod in the application.

[0017] Figure 6 Structure diagram of the support slide rod in the application.

[0018] Figure 7 Structure diagram of the support slide rod in the application.

[0019] Figure 8 Structure diagram of the support slide rod in the application.

[0020] In the figure: 101-beam; 102-center frame; 103-slide rail; 104-support slide frame; 105-magnetic shaft type linear motor; 106-adjusting connecting rod; 107-hub support table; 108-hub support frame; 109-support leaf spring; 110-hub support table rotating seat; 111-limiting sleeve ring; 112-support slide rod; 113-outer hub; 114-inner hub; 115-support protrusion; 116-outer rotating shaft; 117-outer transmission sliding disc; 118-intermediate transmission sliding disc; 119-inner transmission sliding disc; 120-inner rotating shaft; 121-differential; 122-spline shaft; 123-driving gear; 124-passive gear; 125-connection shaft; 126-first universal coupling; 127-second universal coupling; 128-locking electromagnet fixing frame; 129-locking electromagnet guide rod; 130-locking electromagnet extrusion spring; 131-locking electromagnet sliding groove; 132-locking electromagnet. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be further described below in combination with the accompanying drawings. Figures 1-8 The technical solutions of the present application will be further described below in combination with the accompanying drawings.

[0022] The present application provides a vehicle suspension system with protection function, which comprises a beam 101, the lower surface of the beam 101 is fixedly provided with two parallel slide rails 103, the beam 101 is slidably installed with two symmetrical support slide frames 104 through the two slide rails 103; the distance between the two support slide frames 104 can be adjusted, and the hub support table 107 is rotatably installed on each support slide frame 104; the lower surface of the hub support table 107 is rotatably installed with an outer hub 113 and an inner hub 114, the outer hub 113 and the inner hub 114 are respectively rotatably installed on two hub support frames 108, the two hub support frames 108 can independently vertically move, so as to make the outer hub 113 and the inner hub 114 always contact with the road surface; wherein the lower surface of the hub support table 107 is elastically installed with two support leaf springs 109, the two support leaf springs 109 elastically cooperate with the two hub support frames 108, so as to absorb the impact force transmitted by the road surface to the outer hub 113 and the inner hub 114.

[0023] The upper surface of the hub support table 107 is fixedly installed with a hub support table rotating seat 110, which is rotatably installed on the support sliding frame 104; and each support sliding frame 104 is fixedly installed with a magnetic shaft type linear motor 105, the actuating rod end of which is movably connected with the hub support table 107 through an adjusting connecting rod 106, for driving the hub support table 107 to swing on the support sliding frame 104. Each hub support frame 108 is fixedly installed with four support sliding rods 112, all of which are slidably installed on the hub support table 107, and the axis of the support sliding rod 112 is arranged perpendicularly to the upper surface of the hub support table 107, and the top end of each support sliding rod 112 is fixedly sleeved with a limiting sleeve ring 111, for preventing the support sliding rod 112 from separating from the hub support table 107. The upper surface of each hub support frame 108 is fixedly provided with a support protrusion 115, which is in contact with the corresponding support leaf spring 109. Corresponding two hub support frames 108 on each hub support table 107 are respectively rotatably installed with an outer side transmission sliding disc 117 and an inner side transmission sliding disc 119, wherein the outer side transmission sliding disc 117 is fixedly and synchronously rotated with the outer side hub 113 through an outer side rotating shaft 116, the inner side transmission sliding disc 119 is fixedly and synchronously rotated with the inner side hub 114 through an inner side rotating shaft 120, and the outer side transmission sliding disc 117 and the inner side transmission sliding disc 119 are transmissionally matched through an intermediate transmission sliding disc 118; wherein the inner side transmission sliding disc 119 and the intermediate transmission sliding disc 118 are slidably matched along the radial direction of the former, the intermediate transmission sliding disc 118 and the outer side transmission sliding disc 117 are slidably matched along the radial direction of the former, and the sliding direction of the inner side transmission sliding disc 119 and the intermediate transmission sliding disc 118 and the sliding direction of the outer side transmission sliding disc 117 and the intermediate transmission sliding disc 118 are perpendicularly arranged.

[0024] The middle part of the crossbeam 101 is fixedly installed with a center frame 102, the center frame 102 is fixedly installed with a differential 121, two output shafts of the differential 121 are fixedly installed with driving gears 123, the circumferential surface of the driving gears 123 is engaged with transmission of driven gears 124, the driving gears 123 and the driven gears 124 are rotatably installed on the center frame 102, the axial position of the driven gears 124 is inserted with a spline shaft 122 through the cooperation of spline sliding, one end of the spline shaft 122 is fixedly installed with a first universal joint 126, one end of the inner rotating shaft 120 away from the inner transmission sliding disc 119 is fixedly installed with a second universal joint 127, the second universal joint 127 and the first universal joint 126 are transmissionally connected through a connecting shaft 125. The crossbeam 101 is also provided with two symmetrically arranged locking electromagnets sliding grooves 131, each of the locking electromagnets sliding grooves 131 is slidably installed with a locking electromagnet 132, the locking electromagnet 132 is in contact with the upper surface of the supporting sliding frame 104, and the locking electromagnet 132 and the opposite surface of the supporting sliding frame 104 are provided with teeth capable of being meshed and clamped. The locking electromagnet 132 is fixedly installed with two parallel locking electromagnet guide rods 129, the locking electromagnet guide rods 129 are slidably installed on the locking electromagnet fixed frame 128, the locking electromagnet fixed frame 128 is fixedly installed on the crossbeam 101, wherein the locking electromagnet fixed frame 128 is magnetically matched with the locking electromagnet 132, and the locking electromagnet guide rods 129 are circumferentially sleeved with locking electromagnet compression springs 130, the two ends of the locking electromagnet compression springs 130 are fixedly matched with the locking electromagnet fixed frame 128 and the locking electromagnet 132 respectively.

[0025] The working principle of the vehicle suspension system with protection function is as follows: the cross beam 101 is fixedly installed on the vehicle girder, and in operation, the outer hub 113 and the inner hub 114 are in contact with the road surface at the same time, so that the vehicle as a whole is supported by the two outer hubs 113 and inner hubs 114, which can provide greater support force compared with using one, and improve the load capacity of the vehicle. At present, the outer hub 113 and the inner hub 114 of the traditional double-wheel vehicle are fixedly arranged coaxially, when encountering a road bump, and the bump contacts one of the outer hub 113 or the inner hub 114, at this time, one hub is suspended, which will cause the gravity of the vehicle to be applied to one hub (only one side is explained here, the principle of the other side is the same), which will cause the hub to be unable to withstand strong load, and thus tire burst or hub damage is prone to occur. In the working process of the present application, the outer hub 113 and the inner hub 114 are always in contact with the road surface, so the above problem will not occur. Specifically, for example, when the outer hub 113 is pressed against the bump, the inner hub 114 will be tightly attached to the ground under the action of the corresponding support blade spring 109, and vice versa, the outer hub 113 is tightly attached to the ground, which can effectively ensure that the gravity is evenly distributed on the outer hub 113 and the inner hub 114. At the same time, the outer hub 113 and the inner hub 114 can also serve as driving wheels, the output shaft of the engine is connected with the input shaft of the differential 121, the output shaft of the differential 121 drives the driving gear 123 to rotate, the driving gear 123 drives the driven gear 124 to rotate, the driven gear 124 drives the spline shaft 122 to rotate, the spline shaft 122 drives the first universal joint 126, the first universal joint 126, the second universal joint 127 to rotate, the second universal joint 127 drives the inner shaft 120 to rotate, the inner shaft 120 drives the inner hub 114 to rotate and the inner transmission sliding disc 119 to rotate, wherein the inner transmission sliding disc 119 drives the outer transmission sliding disc 117 to rotate through the intermediate transmission sliding disc 118, the outer transmission sliding disc 117 drives the outer hub 113 to rotate through the outer shaft 116, at this time, the outer hub 113 and the inner hub 114 will rotate at the same time, when encountering uneven road surface, the outer transmission sliding disc 117, the intermediate transmission sliding disc 118 and the inner transmission sliding disc 119 will slide radially relative to each other to maintain normal transmission of power, so that the outer hub 113 and the inner hub 114 are always in a rotating state and always in contact with the road surface to provide power for the vehicle. It should be noted that when the inner hub 114 moves up and down, the inner shaft 120 also moves, so the inner shaft 120, the second universal joint 127, the connecting shaft 125 and the first universal joint 126 pull the spline shaft 122 to slide in the axial direction of the driven gear 124.

[0026] When the center of gravity of the goods pulled by the vehicle is high, in order to ensure the safety of the vehicle form, the wheel track between the two wheel hubs of the vehicle can be slightly increased, so as to improve the stability. Specifically, before the vehicle drives, the magnetic shaft type linear motor 105 (the actuating rod has a self-locking function) is controlled, and the actuating rod of the magnetic shaft type linear motor 105 will drive the wheel hub support table 107 to swing on the support sliding frame 104 through the adjusting connecting rod 106. At this time, the outer wheel hub 113 and the inner wheel hub 114 on the wheel hub support table 107 will follow the swing, and at this time, the outer wheel hub 113 and the inner wheel hub 114 on the two wheel hub support tables 107 are controlled to be outward eight or inward eight (depending on the driving direction of the vehicle next), and then the locking electromagnet fixing frame 128 is started, the locking electromagnet fixing frame 128 generates magnetic force to attract the locking electromagnet 132, the locking electromagnet 132 compresses the locking electromagnet compression spring 130, so that the locking electromagnet 132 is separated from the support sliding frame 104. Then start the vehicle, let the vehicle form (move towards the opening direction of the eight, that is, the vehicle can be driven), at this time, the outer wheel hub 113 and the inner wheel hub 114 on both sides will roll along the swing direction of themselves, which will cause the distance between the two wheel hub support tables 107 to change (at this time, the distance needs to be changed, and if the distance is changed, the reverse movement can be realized), when the movement is appropriate, stop the vehicle movement, and then control the magnetic shaft type linear motor 105, so that the wheel hub support table 107 swings to the initial position, that is, the rolling direction of the outer wheel hub 113 and the inner wheel hub 114 is consistent with the driving direction of the vehicle. Then power off the locking electromagnet fixing frame 128, and the locking electromagnet 132 is re-contacted with the support sliding frame 104 under the action of the locking electromagnet compression spring 130, so that the support sliding frame 104 cannot slide on the cross beam 101. At the same time, through the independent control of the two magnetic shaft type linear motors 105 on the support sliding frames 104, the outer wheel hub 113 and the inner wheel hub 114 on the wheel hub support tables 107 on both sides can be independently controlled to swing, for example, towards the same side (non-eight), which can realize the function of rear wheel auxiliary steering, so as to improve the turning performance of the vehicle.

Claims

1. A vehicle suspension system having a protection function, characterized by: The beam (101) is provided with two parallel sliding rails (103) on the lower surface, and the beam (101) is slidably installed with two symmetrical support sliding frames (104) through the two sliding rails (103); the distance between the two support sliding frames (104) can be adjusted, and a hub support table (107) is rotatably installed on each support sliding frame (104); The lower surface of the hub support table (107) is rotatably installed with an outer hub (113) and an inner hub (114), and the outer hub (113) and the inner hub (114) are rotatably installed on two hub support frames (108), respectively, and the two hub support frames (108) can independently move vertically to keep the outer hub (113) and the inner hub (114) in contact with the road surface; wherein the lower surface of the hub support table (107) is elastically installed with two support blade springs (109), and the two support blade springs (109) are elastically matched with the two hub support frames (108) to absorb the impact force transmitted to the outer hub (113) and the inner hub (114) by the road surface.

2. A vehicle suspension system with a protection function according to claim 1, characterized in that: The upper surface of the hub support table (107) is fixedly installed with a hub support table rotating seat (110), and the hub support table rotating seat (110) is rotatably installed on the support sliding frame (104); and each support sliding frame (104) is fixedly installed with a magnetic shaft type linear motor (105), and the actuating rod end of the magnetic shaft type linear motor (105) is movably connected with the hub support table (107) through an adjusting connecting rod (106) to drive the hub support table (107) to swing on the support sliding frame (104).

3. A vehicle suspension system with a protection function according to claim 2, characterized in that: Each hub support frame (108) is fixedly installed with four support sliding rods (112), and all the support sliding rods (112) are slidably installed on the hub support table (107), and the axis of the support sliding rod (112) is arranged vertically to the upper surface of the hub support table (107), and the top end of each support sliding rod (112) is fixedly sleeved with a limiting sleeve ring (111) to prevent the support sliding rod (112) from separating from the hub support table (107).

4. A vehicle suspension system with a protection function according to claim 3, characterized in that: The upper surface of each hub support frame (108) is fixedly provided with a support protrusion (115), and the support protrusion (115) is in contact with the corresponding support blade spring (109).

5. A vehicle suspension system with a protection function according to claim 4, characterized in that: Each hub support table (107) is provided with two corresponding hub support frames (108), and each hub support frame (108) is provided with an outer transmission sliding disc (117) and an inner transmission sliding disc (119) which are rotatably installed on the hub support frame (108), respectively. The outer transmission sliding disc (117) is fixedly and synchronously rotated with the outer hub (113) through an outer rotating shaft (116), and the inner transmission sliding disc (119) is fixedly and synchronously rotated with the inner hub (114) through an inner rotating shaft (120). The outer transmission sliding disc (117) and the inner transmission sliding disc (119) are transmissionally matched through a middle transmission sliding disc (118). The inner transmission sliding disc (119) and the middle transmission sliding disc (118) are slidably matched along the radial direction of the inner transmission sliding disc (119), the middle transmission sliding disc (118) and the outer transmission sliding disc (117) are slidably matched along the radial direction of the middle transmission sliding disc (118), and the sliding directions of the inner transmission sliding disc (119) and the middle transmission sliding disc (118) are perpendicular to the sliding directions of the outer transmission sliding disc (117) and the middle transmission sliding disc (118).

6. A vehicle suspension system with a protection function according to claim 5, characterized in that: The center frame (102) is fixedly installed on the middle part of the cross beam (101), and the differential (121) is fixedly installed on the center frame (102). The two output shafts of the differential (121) are fixedly installed with driving gears (123), and the circumferential surface of the driving gear (123) is meshingly transmissionally provided with a driven gear (124). The driving gear (123) and the driven gear (124) are rotatably installed on the center frame (102), and the axis position of the driven gear (124) is inserted with a spline shaft (122) in a spline sliding matching mode. One end of the spline shaft (122) is fixedly installed with a first universal joint (126), and the end of the inner rotating shaft (120) away from the inner transmission sliding disc (119) is fixedly installed with a second universal joint (127). The second universal joint (127) and the first universal joint (126) are transmissionally connected through a connecting shaft (125).

7. A vehicle suspension system having a protection function according to claim 6, characterised in that: The cross beam (101) is further provided with two symmetrically arranged locking electromagnet sliding grooves (131), and each locking electromagnet sliding groove (131) is slidably installed with a locking electromagnet (132). The locking electromagnet (132) is in contact with the upper surface of the support sliding frame (104), and the locking electromagnet (132) and the opposite surface of the support sliding frame (104) are provided with teeth which can be mutually meshingly clamped.

8. A vehicle suspension system with a protection function according to claim 7, characterized in that: The locking electromagnet (132) is fixedly installed with two parallel locking electromagnet guide rods (129), the locking electromagnet guide rods (129) are slidably installed on the locking electromagnet fixing frame (128), and the locking electromagnet fixing frame (128) is fixedly installed on the cross beam (101). The locking electromagnet fixing frame (128) is magnetically matched with the locking electromagnet (132), and the locking electromagnet guide rods (129) are circumferentially sleeved with locking electromagnet extrusion springs (130), and the two ends of the locking electromagnet extrusion springs (130) are fixedly matched with the locking electromagnet fixing frame (128) and the locking electromagnet (132), respectively.

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