A physical stop mechanism

Abstract

The application relates to a physical stop mechanism, which comprises a support installed on a lifting flat layer, a stop component slidably arranged on the lifting flat layer, the sliding direction of the stop component being perpendicular to the plane where the lifting flat layer is located, and a driving component installed on the support and used for driving the stop component to rise above the top surface of the lifting flat layer or to be retracted below the top surface of the lifting flat layer; when a sub-car travels from one side, the stop component on the side is retracted below the top surface of the lifting flat layer, and the stop component on the opposite side is raised above the top surface of the lifting flat layer. The application has the effect of guaranteeing the safety of bidirectional travel of the sub-car without hindering the bidirectional travel of the sub-car.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of safety stop, in particular to a physical stop mechanism. BACKGROUND

[0002] With the rapid development of the national economy, the number of cars owned at home and abroad is rapidly increasing, and the problem of parking difficulty is becoming increasingly apparent. The lifting parking robot is an effective way to solve the problem of parking difficulty.

[0003] The lifting parking robot includes a mother car for lifting and a child car slidingly connected to the mother car for carrying the car. The lifting platform includes two parallel guide rails, and a plurality of support rods are vertically installed between the two guide rails. The child car includes a walking mechanism that can slide along the guide rail and a clamping force arm installed on both sides of the walking mechanism for clamping and lifting the tire of the car. In use, the walking mechanism of the child car slides along the guide rail to extend into the bottom of the car, the clamping force arm of the child car extends to lift the tire of the car, and the walking mechanism walks in the direction to drive the child car and the car back to the mother car, and then the mother car moves to the parking house or other access position.

[0004] At present, the child car can only walk in one direction on the lifting platform, that is, it can only enter the parking space or the elevator from one side of the mother car. In order to ensure the safety of the child car, a fixed stop plate is usually installed on the other side of the lifting platform to prevent the child car from sliding off the lifting platform. However, this one-way access method requires the mother car to rotate 180 degrees in some parking spaces to allow the child car to enter the parking space or the elevator to access the vehicle. This greatly affects the efficiency of accessing the vehicle. Therefore, in order to improve the efficiency of the child car accessing the vehicle, the lifting parking robot is upgraded so that the child car is configured to walk bidirectionally on the lifting platform.

[0005] The inventor believes that there is an urgent need to design a physical stop mechanism that does not hinder the bidirectional walking of the child car while ensuring the safety of the bidirectional walking of the child car. SUMMARY

[0006] In order to ensure the safety of the bidirectional walking of the child car without hindering the bidirectional walking of the child car, the present application provides a physical stop mechanism.

[0007] The physical stop mechanism provided by the present application adopts the following technical scheme:

[0008] A physical stop mechanism, comprising:

[0009] a bracket installed on the lifting platform;

[0010] a stop component slidably arranged on the lifting platform, the sliding direction of the stop component being perpendicular to the plane on which the lifting platform is located;

[0011] a driving assembly mounted on the bracket for driving the stop assembly to rise above the top surface of the lifting flat or to retract below the top surface of the lifting flat;

[0012] When the sub-car moves from one side, the stop assembly on the side retracts below the top surface of the lifting flat, and the stop assembly on the other side rises above the top surface of the lifting flat.

[0013] By adopting the above technical scheme, when the sub-car moves from one side, the driving assembly on the side is started to drive the stop assembly to retract below the top surface of the lifting flat, and the stop assembly on the other side rises above the top surface of the lifting flat, so as to block the movement of the sub-car and the vehicle, reduce the inertia of the sub-car and the vehicle, and reduce the probability of the sub-car separating from the lifting flat, thereby ensuring the safety of the bidirectional movement of the sub-car without hindering the bidirectional movement of the sub-car.

[0014] Preferably, the bracket is located in a mounting space formed between the bottom surface and the top surface of the lifting flat; the bracket comprises a support beam arranged between two support rods and a mounting plate mounted on the support beam, the driving assembly is mounted on the mounting plate and located in the mounting space, and the driving assembly is arranged vertically to the support beam.

[0015] By adopting the above technical scheme, the driving assembly and the bracket are both mounted in the mounting space formed by the lifting flat, the height of the mounting space is limited by the thickness of the guide rail of the lifting flat, the installation of the driving assembly is ingeniously realized in the limited space, the top surface of the driving assembly does not protrude from the top surface of the lifting flat, and the bidirectional movement of the sub-car on the lifting flat is ensured.

[0016] Preferably, the stop assembly comprises a sliding block guide rail mounted on the inner side of the guide rail and a sliding block slidingly connected in the sliding block guide rail, the driving assembly drives the sliding block to slide along the sliding block guide rail, and the driving direction of the driving assembly is vertically arranged to the sliding direction of the sliding block.

[0017] By adopting the above technical scheme, the movement of the driving assembly in the horizontal direction can drive the sliding block to move in the vertical direction to extend above the top surface of the lifting flat, so as to stop the movement of the sub-car when the sub-car lifts the vehicle and returns; the sliding of the sliding block in the vertical direction is realized in the limited mounting space, the structure is small and the operation is convenient; the sliding block guide rail is vertically arranged, which can guide the movement of the sliding block and limit the movement direction of the sliding block, so that the sliding block can only slide up and down in the vertical direction.

[0018] Preferably, the driving assembly comprises a linear driving member mounted on the support and a driving block mounted on the linear driving member away from the mounting plate, the driving block is used to extend into the bottom of the sliding block and to lift the sliding block with the driving of the linear driving member, the sliding guide rail is provided with an avoiding hole for the driving block to pass through.

[0019] By adopting the above technical scheme, the linear driving member drives the driving block to gradually slide in the direction of the sliding block, the driving block extends into the bottom of the sliding block through the avoiding hole, and the sliding block is gradually lifted with the driving of the linear driving member. The horizontal displacement of the linear driving member is converted into the vertical displacement of the sliding block through the transmission of the driving block, the scheme is simple, the sliding block can be lifted only by controlling the linear driving member, the operation is simple, and the installation demand of the small installation space on the lifting and leveling is also met.

[0020] Preferably, the side of the driving block towards the sliding block is formed with a lifting slope surface, the lifting slope surface forms an acute angle with the bottom surface of the driving block, and the bottom of the sliding block is formed with a supporting inclined surface consistent with the inclination of the lifting slope surface to facilitate the insertion of the driving block and to be gradually lifted with the movement of the driving block.

[0021] By adopting the above technical scheme, the lifting slope surface is arranged, and the bottom of the sliding block is cut into a supporting inclined surface consistent with the inclination of the lifting slope surface, so that the driving block extends into the bottom of the sliding block along the supporting inclined surface of the sliding block, and the sliding block is gradually lifted with the forward movement of the driving block, so that the movement of the sliding block is more smooth and smooth.

[0022] Preferably, the top surface of the driving block is a horizontal supporting surface connected with the lifting slope surface.

[0023] By adopting the above technical scheme, when the sliding block extends to the height set for stopping, with the continuous forward movement of the driving block, the height of the sliding block no longer rises, but moves horizontally on the horizontal supporting surface. The horizontal supporting surface supports the sliding block, so that the support of the driving block on the sliding block is more stable, and the stopping effect of the sliding block is more stable.

[0024] Preferably, a stop block for limiting the movement distance of the driving block is mounted on the horizontal supporting surface, the stop block is located on the side of the driving block away from the sliding block, and the linear driving member stops when the stop block abuts against the side wall of the sliding block.

[0025] By adopting the above technical scheme, the arrangement of the stop block can avoid the excessive extension of the driving block, causing the driving block to be separated from the sliding block. If the driving block is separated from the sliding block, the sliding block will slide down under the action of gravity and abut against the linear driving member, which will cause the driving block to be unable to be pulled back smoothly, affecting the normal use of the physical stopping mechanism.

[0026] Preferably, the linear driving member comprises a linear electric push rod, and the driving block is connected with a piston rod of the linear electric push rod.

[0027] By adopting the technical scheme, the volume is small and the operation is simple, and the device is suitable for installation at a position with small space on the lifting flat.

[0028] Preferably, the stop component further comprises a connecting member for stably connecting the sliding block in the sliding block guide rail.

[0029] By adopting the technical scheme, the connecting member can reduce the probability of the sliding block being pulled out of the sliding block guide rail after the driving block is retracted, and guarantee the stable connection of the sliding block and the sliding block guide rail.

[0030] Preferably, the connecting member comprises a first connecting rod installed on the side wall of the sliding block guide rail, a second connecting rod installed on both sides of the sliding block, and an extension spring installed between the first connecting rod and the second connecting rod, and both sides of the sliding block guide rail are provided with sliding holes for the second connecting rod to extend out and slide up and down.

[0031] By adopting the technical scheme, when the sliding block is driven to rise by the driving block, the second connecting rod gradually moves upward in the sliding hole until the second connecting rod is blocked by the top end of the sliding hole, at this time, the sliding block moves to the highest position, and the extension spring is in a stretched state; when the driving block is retracted, the sliding block falls under the action of gravity and the restoring force of the extension spring until the second connecting rod abuts against the bottom end of the sliding hole to limit the position of the sliding block in the sliding block guide rail.

[0032] In summary, the present application has at least one of the following beneficial technical effects:

[0033] 1. The present application sets the stop component which can extend and retract along the direction perpendicular to the horizontal plane of the lifting flat and the driving component for driving the stop component, when the stop component is needed, the stop component can be conveniently controlled to rise to block the sub-car, when the sub-car needs to walk, the stop component can be conveniently controlled to fall below the top surface of the lifting flat, so that the sub-car can walk smoothly, and the support can guarantee that the physical stop mechanism of the present application is below the top surface of the lifting flat when the sub-car walks, so as not to hinder the walking of the sub-car.

[0034] 2. The lifting slope is provided to facilitate the driving block to extend into the bottom of the sliding block, and gradually lift the sliding block as the driving block moves forward, so that the movement of the sliding block is more smooth and smooth.

[0035] 3. The horizontal support surface is provided to stably support the sliding block when the sliding block moves to the highest height, and guarantee the stability of the stop of the sliding block. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the physical stop mechanism of the present application installed at one end of the lifting flat.

[0037] Figure 2 is a schematic diagram of the overall structure of the present application.

[0038] Figure 3 is a schematic diagram of the partial section made for embodying the movement process of the driving block pushing the slider.

[0039] Legend: 1, support; 11, support beam; 12, mounting plate; 121, horizontal plate; 122, vertical plate; 13, rib plate; 2, stop assembly; 21, slider guide rail; 211, avoiding hole; 212, sliding hole; 22, bent plate; 23, slider; 231, top support inclined surface; 24, connecting piece; 241, first connecting rod; 242, second connecting rod; 243, telescopic spring; 3, driving assembly; 31, linear driving piece; 311, linear electric push rod; 312, piston rod; 313, contact plate; 32, driving block; 321, lifting slope surface; 322, horizontal support surface; 33, stop block; 4, lifting flat; 41, guide rail; 42, support rod; 43, mounting space. DETAILED DESCRIPTION

[0040] The following will be described in detail with reference to the accompanying drawings. Figures 1-3 The present application will be further described in detail.

[0041] The embodiment of the present application discloses a physical stop mechanism. It is used for being installed on a lifting flat 4, and at least two groups are provided, and the two groups of physical stop mechanisms are respectively located at two ends of the lifting flat 4. Referring to Figure 1 , Figure 2 and Figure 3 , the physical stop mechanism comprises a support 1 installed on the lifting flat 4, a stop assembly 2 slidingly arranged on the lifting flat and a driving assembly 3 installed on the support 1. The sliding direction of the stop assembly 2 is perpendicular to the plane where the lifting flat 4 is located. The driving assembly 3 is used for driving the stop assembly 2 to rise above the top surface of the lifting flat 4 or to retract below the top surface of the lifting flat 4. When the sub-car travels from one side, the stop assembly 2 on this side is retracted below the top surface of the lifting flat 4, so as to guarantee that the sub-car smoothly drives out and retreats; the stop assembly 2 on the opposite side is raised above the top surface of the lifting flat 4, and when the sub-car gradually retreats, the sub-car moving to the position will stop moving because of the blocking of the stop assembly 2, thereby reducing the probability that the sub-car is separated from the other side of the lifting flat 4 due to the inertia when traveling, and guaranteeing the safety of the sub-car when traveling on the lifting flat 4 in two directions.

[0042] Referring to Figure 1 and Figure 2The bracket 1 comprises a support beam 11 installed between two support rods 42 and a mounting plate 12 installed on the support beam 11. The two ends of the support beam 11 are fixed on the support rods 42 by bolts. The mounting plate 12 is an L-shaped plate, and the horizontal plate 121 in the mounting plate 12 is fixed on the bottom surface of the support beam 11 by bolts. The driving assembly 3 is fixed on the vertical plate 122 of the mounting plate 12, so that the driving assembly 3 is vertically arranged with the support beam 11 in the horizontal direction. The support beam 11 is lower than the top surface of the lifting flat layer 4. The height between the bottom surface and the top surface of the lifting flat layer 4 forms a mounting space 43 for mounting the bracket 1 and the driving assembly 3, and the height of the mounting space 43 is limited by the thickness of the guide rail 41. In the limited space, the stable mounting of the bracket 1 and the driving assembly 3 is realized, and the movement of the parent vehicle and the child vehicle is avoided to be blocked. In order to guarantee the support strength of the horizontal plate 121 and the vertical plate 122, the rib plate 13 is fixedly connected between the horizontal plate 121 and the vertical plate 122. One side of the rib plate 13 is welded with the horizontal plate 121, and the other side is welded with the vertical plate 122.

[0043] With reference to Figure 2 The stop assembly 2 comprises a sliding block guide rail 21 installed on the inner side of the guide rail 41 and a sliding block 23 slidingly connected in the sliding block guide rail 21. The cross section of the sliding block guide rail 21 is U-shaped to surround the sliding block 23. In order to facilitate the installation of the sliding block guide rail 21, the bending plates 22 are integrally formed on both sides of the sliding block guide rail 21, and the bending plates 22 are fixedly connected with the inner side of the guide rail 41 by bolts. The sliding block guide rail 21 is below the top surface of the lifting flat layer 4. The driving assembly 3 drives the sliding block 23 to slide along the sliding block guide rail 21. The driving direction of the driving assembly 3 is vertically arranged with the sliding direction of the sliding block 23.

[0044] With reference to Figure 2 The driving assembly 3 is located between the bracket 1 and the sliding block 23. The driving assembly 3 comprises a linear driving member 31 installed on the mounting plate 12 and a driving block 32 installed on the end of the linear driving member 31 away from the mounting plate 12. The linear driving member 31 drives the driving block 32 to move linearly, so that the driving block 32 extends into the bottom of the sliding block 23, and with the continuous driving of the linear driving member 31, the sliding block 23 is lifted up by the driving block 32, so that the top surface of the sliding block 23 extends above the top surface of the lifting flat layer 4 to block the movement of the child vehicle, thereby guaranteeing the safety of the child vehicle. The avoiding hole 211 is formed in the sliding block guide rail 21 for the driving block 32 to pass through.

[0045] With reference to Figure 2 and Figure 3, in order to facilitate the drive block 32 into the bottom of the slider 23, the drive block 32 is formed with a lifting slope 321 on the side of the drive block 32 towards the slider 23, and the lifting slope 321 forms an acute angle with the bottom surface of the drive block 32. The bottom of the slider 23 is cut at an angle near the side of the drive block 32, so that the bottom of the slider 23 forms a bracing slope 231 consistent with the slope of the lifting slope 321. As the drive block 32 gradually moves forward, the slider 23 gradually rises along the slope of the lifting slope 321 above the top surface of the lifting platform 4.

[0046] Referring to Figure 2 and Figure 3 , a horizontal support surface 322 connected with the lifting slope 321 is formed on the top surface of the drive block 32. When the slider 23 is lifted to the highest position, the bottom surface of the slider 23 is placed on the horizontal support surface 322, and the side surface of the slider 23 is surrounded by the slider guide rail 21, which ensures the stability of the slider 23 in the stop state and reduces the probability of shaking of the slider 23 after being hit by the quilt car. Preferably, the length of the horizontal support surface 322 should be not less than the length of the bottom surface of the slider 23, so as to ensure that the bottom surface of the slider 23 is placed on the horizontal support surface 322.

[0047] Referring to Figure 2 and Figure 3 , a stop block 33 for limiting the movement distance of the drive block 32 is installed on the horizontal support surface 322, and the stop block 33 is located on the side of the drive block 32 away from the slider 23. When the drive block 32 moves to the stop block 33 abutting against the side wall of the slider 23, the linear drive member 31 stops driving the drive block 32. In order to avoid the drive block 32 from being excessively extended, causing the drive block 32 to be separated from the slider 23, at this time the slider 23 will slide down under the action of gravity and abut against the linear drive member 31, which will cause the drive block 32 to be unable to be pulled back smoothly, affecting the normal use of the physical stop mechanism of the present application. The stop block 33 can be fixed on the drive block 32 by welding, bolt connection or other means, or can be integrally formed with the drive block 32, and the present application only takes the example of the stop block 33 being integrally formed with the drive block 32 for description.

[0048] Referring to Figure 2The linear driving member 31 can be any device that can drive the driving block 32 to move linearly. For example, the linear driving member 31 can be a linear motor, a linear slide assembly, or a linear electric push rod 311. When the linear driving member 31 uses a linear motor or a linear slide assembly, the base of the linear motor or the linear slide assembly is fixed to the bottom surface of the lifting flat layer 4, and the sliding block is connected to the driving block 32. When the linear driving member 31 uses a linear electric push rod 311, the driving block 32 is fixedly connected to the piston rod 312 of the linear electric push rod 311 by bolts or screws. Considering that the distance between the lifting flat layer 4 and the ground is relatively low, if a linear motor or a linear slide assembly is used, the height of the bottom surface of the lifting flat layer 4 from the ground should be greater than the thickness of the base, so it is extremely likely that the installation conditions cannot be met. Therefore, the linear driving member 31 of the present application is described by using a linear electric push rod 311 as an example. In order to facilitate the installation of the driving block 32, the end of the piston rod 312 is fixed with a contact plate 313, and the driving block 32 is fixedly connected to the contact plate 313 by bolts.

[0049] Referring to Figure 2 The stop assembly 2 further comprises a connecting member 24 for stably connecting the sliding block 23 in the sliding block guide rail 21, so as to reduce the probability that the driving block 32 is retracted and the sliding block 23 is disengaged from the sliding block guide rail 21.

[0050] In a specific structural embodiment, two connecting members 24 are provided, and the two connecting members 24 are located on both sides of the sliding block 23. The connecting member 24 comprises a first connecting rod 241 mounted on the two opposite side walls of the sliding block guide rail 21, a second connecting rod 242 mounted on both sides of the sliding block 23, and an extension spring 243 mounted between the first connecting rod 241 and the second connecting rod 242. The sliding block guide rail 21 is provided with a sliding hole 212 for the second connecting rod 242 to extend out and slide. The sliding hole 212 is formed along the length direction of the sliding block guide rail 21. The extension spring 243 is arranged along the axis direction of the sliding hole 212. The first connecting rod 241 is fixed to the bottom of the sliding hole 212. In the normal state, the sliding block 23 is located below the top surface of the lifting flat layer 4, and the extension spring 243 is in a relaxed state. When stopping is needed, the linear driving member 31 pushes the driving block 32 to move forward to gradually lift the sliding block 23, and the extension spring 243 is gradually stretched. When the second connecting rod 242 moves to the end of the sliding hole 212 away from the first connecting rod 241, the sliding block 23 moves to the highest position and is also moved into position. When passing on this side, the linear driving member 31 pulls the driving block 32 to retract, and the extension spring 243 is contracted under the action of the restoring force to drive the sliding block 23 to gradually slide down. When the second connecting rod 242 is placed at the bottom end of the sliding hole 212, the sliding block 23 stops sliding down and limits the sliding block 23 to stop at the position at this time, so that the sliding block 23 stays at the fixed position of the sliding block guide rail 21 and does not disengage from the sliding block guide rail 21. At this time, the length of the sliding hole 212 can be explained as the movement stroke of the sliding block 23.

[0051] In another structural embodiment (not shown in the figure), the connecting piece 24 is provided with two opposite ones, two connecting pieces 24 are respectively located at the inner side of the slider guide rail 21. The connecting piece 24 includes a slide rail fixed on the inner side of the slider guide rail 21, a connecting block fixed on both sides of the slider 23 and slidably connected to the slide rail, and a connecting spring connected between the bottom of the slide rail and the connecting block.

[0052] The implementation principle of the physical stop mechanism in the embodiment of the application is as follows: when the physical stop mechanism on the side needs to be stopped: the linear drive 31 is started, the driving block 32 is extended into the avoiding hole 211, and with the movement of the driving block 32, the slider 23 gradually rises along the lifting slope surface 321 and moves to the horizontal support surface 322, the slider 23 is lifted above the top surface of the lifting layer 4 to stop the child car. At this time, the second connecting rod 242 is stopped at the top end of the sliding hole 212, and the extension spring 243 is in a stretched state.

[0053] When the child car needs to walk from the side, the physical stop on the side needs to be released: the linear drive 31 is started to make the piston rod 312 drive the driving block 32 to retract, the slider 23 falls under the action of gravity and the restoring force of the extension spring 243, until the second connecting rod 242 is blocked by the bottom end of the sliding hole 212, so that the second connecting rod 242 is placed at the bottom end of the two sliding holes 212, reducing the probability of disengagement of the slider 23 and the slider guide rail 21.

[0054] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A physical stop mechanism, comprising: a bracket (1) for being mounted on a lifting flat (4); the bracket (1) comprises a support beam (11) for being arranged between two support rods (42) and a mounting plate (12) mounted on the support beam (11); a stop assembly (2) slidably arranged on the lifting flat (4), a sliding direction of the stop assembly (2) being perpendicular to a plane in which the lifting flat (4) is located; a driving assembly (3) mounted on the bracket (1) and used for driving the stop assembly (2) to rise above a top surface of the lifting flat (4) or to retract below the top surface of the lifting flat (4); when a sub-car travels on one side, the stop assembly (2) on the side retracts below the top surface of the lifting flat (4); the stop assembly (2) on the opposite side rises above the top surface of the lifting flat (4); the stop assembly (2) comprises a slider guide rail (21) mounted on an inner side of a guide rail (41) and a slider (23) slidably connected in the slider guide rail (21); the driving assembly (3) drives the slider (23) to slide along the slider guide rail (21); the driving assembly (3) comprises a linear driving member (31) mounted on the bracket (1) and a driving block (32) mounted on a side of the linear driving member (31) away from the mounting plate (12); the driving block (32) is used for extending into a bottom of the slider (23) and being driven by the linear driving member (31) to lift the slider (23) up; the slider guide rail (21) is provided with an avoiding hole (211) through which the driving block (32) passes; a lifting slope surface (321) is formed on a side of the driving block (32) facing the slider (23); the lifting slope surface (321) forms an acute angle with a bottom surface of the driving block (32); a top supporting inclined surface (231) with a same inclination as the lifting slope surface (321) is formed on the bottom of the slider (23) to facilitate the insertion of the driving block (32) and being gradually lifted up along the movement of the driving block (32); the stop assembly (2) further comprises a connecting member (24) for stably connecting the slider (23) in the slider guide rail (21); the connecting member (24) comprises a first connecting rod (241) mounted on a side wall of the slider guide rail (21), a second connecting rod (242) mounted on both sides of the slider (23) and an extension spring (243) mounted between the first connecting rod (241) and the second connecting rod (242); both sides of the slider guide rail (21) are provided with slide holes (212) through which the second connecting rod (242) extends and slides up and down.

2. The physical stop mechanism of claim 1, wherein: the bracket (1) is located in a mounting space (43) formed between a bottom surface and a top surface of the lifting flat (4); the driving assembly (3) is mounted on the mounting plate (12) and located in the mounting space (43); the driving assembly (3) is arranged vertically to the support beam (11).

3. The physical stop mechanism of claim 1, wherein: The driving direction of the driving assembly (3) is vertically arranged with the sliding direction of the sliding block (23).

4. The physical stop mechanism of claim 3, wherein: The sliding block guide rail (21) is provided with an avoiding hole (211) for the driving block (32) to pass through.

5. The physical stop mechanism of claim 1, wherein: The top surface of the driving block (32) is a horizontal supporting surface (322) connected with the lifting slope surface (321).

6. The physical stop mechanism of claim 5, wherein: The horizontal supporting surface (322) is provided with a stop block (33) for limiting the moving distance of the driving block (32), and the stop block (33) is located on the side of the driving block (32) away from the sliding block (23), and the linear driving part (31) stops when the driving block (32) moves to the stop block (33) and the side wall of the sliding block (23) abuts.

7. The physical stop mechanism of claim 1, wherein: The linear driving part (31) comprises a linear electric push rod (311), and the driving block (32) is connected with the piston rod (312) of the linear electric push rod (311).

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