Limiting structure of sliding door

Abstract

The invention relates to the technical field of automobile door structures, in particular to a sliding door limiting structure which comprises a limiting concave part and a limiting convex part, one of the limiting concave part and the limiting convex part is installed on a frame vertical beam, the other one of the limiting concave part and the limiting convex part is installed on a sliding door, and the limiting concave part and the limiting convex part are connected when the sliding door is in a closed state. The damping movement mechanism comprises an adjusting part and a sliding part, the sliding part is in sliding connection with the limiting concave part through the adjusting part, and the sliding part abuts against the limiting convex part. The problem that knocking abnormal sound is easily generated in the sliding door limiting structure area in the vehicle running process can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile door structures, and more particularly to a sliding door limiting structure. Background Art

[0002] With the increasing popularity of MPVs (Multi-Purpose Vehicles) in the passenger car market, their unique sliding door design has become a core feature that distinguishes them from traditional sedans and SUVs (Sports Utility Vehicles). Compared to rotating doors, sliding doors open and close by moving parallel to the body's side rails. While this method of movement provides greater entry and exit space, it also places higher demands on the door's positional reliability when closed. Currently, the industry generally uses a sliding door with a concave and convex block structure as the core retaining mechanism. Specifically, a concave locating block is positioned on the inside of the door, while a convex guide block is positioned in a corresponding position on the door frame. The interlocking constraint between these two ensures spatial positioning of the sliding door when closed.

[0003] While the aforementioned existing technical solutions offer advantages such as simple implementation and guaranteed initial assembly accuracy, they exhibit significant technical deficiencies during actual vehicle use. This primarily manifests as a knocking noise in the sliding door's retaining structure when the vehicle travels over bumpy roads. This noise progressively worsens as the impact portion of the retaining structure deforms over time. Analysis revealed that the technical root of this problem lies in the incompatibility between the dynamic characteristics of the sliding door system and the traditional retaining structure. The sliding connection formed by the sliding door's guide rail and slider system to the vehicle body lacks the fully rigid hinged connection of a rotary door. During vehicle operation, inertial loads and road excitation generate multi-dimensional micro-displacements, with the most significant displacement amplitude in the direction perpendicular to the door's plane. However, the contact surface morphology and material combination of the existing concave-convex block structure are difficult to effectively adapt to these dynamic operating conditions. The engineering plastic layer is susceptible to plastic deformation under long-term alternating impact loads, resulting in an asymmetric expansion of the fit clearance and the formation of stress concentration areas. The cumulative effect of this structural damage not only exacerbates the abnormal noise problem, but also reduces the positioning accuracy of the sliding door system and affects the sealing performance of the entire vehicle. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defect of the sliding door in the prior art that it will produce multi-dimensional micro-floating displacement due to inertial load and road excitation during vehicle driving, and to provide a sliding door limiting structure that can effectively avoid the problem of knocking noise in the sliding door limiting structure area during vehicle driving.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A sliding door limiting structure is provided, including a limiting concave part and a limiting convex part, one of the limiting concave part and the limiting convex part is installed on the vertical beam of the frame, and the other is installed on the sliding door, the limiting concave part and the limiting convex part are connected when the sliding door is in a closed state, and also includes a damping motion mechanism, the damping motion mechanism includes an adjusting part and a sliding part, the sliding part is arranged on both sides of the cavity inside the limiting concave part and is slidably connected to the limiting concave part, the sliding parts are all in contact with the limiting convex part, and the adjusting part pushes the sliding part to slide in the limiting concave part.

[0006] During operation of the above solution, when the sliding door is closed, the protruding and concave retaining members form a basic positioning fit. The concave retaining member, mounted on the vertical beam of the vehicle frame, forms a composite sliding pair with the adjusting member via a sliding member. When unaffected by external forces, the adjusting member maintains the initial equilibrium position of the sliding member, while the sliding member forms a surface contact constraint with the protruding retaining member on one side of the sliding door. This maintains the rigid positioning function of the traditional concave-convex block structure, ensuring basic positioning accuracy when the door is statically closed. However, when the vehicle is driven and generates vibration excitation, the sliding door system experiences dynamic displacement relative to the vehicle body due to mass inertia. At this point, the damping mechanism enters the active compensation phase: the stopper applies a dynamic load to the slider, pushing it to slightly displace within the stopper recess in the direction of the adjustment portion's constraint. When the stopper exerts pressure on one side of the slider, the adjustment portion on that side compresses and deforms to absorb the impact, while the adjustment portion on the other side stretches and deforms, maintaining contact with the stopper recess. The entire adjustment process converts the impact's kinetic energy into heat or potential energy through the deformation of the adjustment portion, effectively buffering vibrations of varying amplitudes. After the dynamic displacement is eliminated, the self-restoring properties of the adjustment portion drive the slider back to its initial equilibrium position. The entire operating process maintains the traditional bump-and-concave structure while introducing a slider and adjustment portion. By maintaining contact with the stopper recess on both sides, the slider avoids direct collision and noise caused by impact loads. The adjustment portion dynamically absorbs dynamic loads and road excitation during driving, preventing collision and noise between the slider and the stopper recess. This effectively reduces vibration and noise during driving while maintaining the positioning accuracy of the sliding door.

[0007] Furthermore, the sliding part includes a sliding arm and a touch plate, the touch plate abuts against the limiting protrusion, and slideways are provided on both sides of the cavity of the limiting concave part. The adjustment part is provided in the slideways on both sides and abuts against the sliding arm; the touch plate is made of pressure-resistant and impact-resistant material, and can expand the contact area and transfer the load to the sliding arm when it contacts the limiting protrusion, so that the sliding arm slides in the slideway and absorbs the kinetic energy of the impact through the adjustment part.

[0008] Furthermore, the regulating part is a liquid medium filled in the slide, and the damping motion mechanism also includes an infusion loop, which is arranged in the limiting recess, and the infusion loop connects the slides on both sides; oil is a relatively high-quality regulating part. When the sliding part is subjected to dynamic load, the liquid medium can convert kinetic energy into heat energy through the effects of molecular friction and viscous resistance, which can effectively suppress high-frequency vibrations and reduce amplitude.

[0009] Furthermore, the connecting node between the infusion loop and the slide is located on the side of the slide, and the end of the sliding arm away from the touch plate is provided with a reduced diameter portion; due to the volume size and structure of the limiting recess, arranging the connecting node on the side of the slide can increase the volume utilization rate of the limiting recess, and the liquid medium in the slide must enter the infusion loop. The effective activity space of the liquid medium is only the space between the inner wall of the slide and the outer wall of the sliding arm. The sliding arm is provided with a reduced diameter portion, which increases the effective flow space of the liquid medium by reducing the volume of the sliding arm, reduces the flow shear resistance of the liquid medium, improves the fluidity of the liquid medium, and is more conducive to the liquid medium flowing back and forth between the infusion loop and the slide.

[0010] Furthermore, it also includes a first seal, which is installed on the side of the slide close to the touch plate and abuts against the sliding arm; there is a reciprocating sliding motion between the sliding arm and the slide, and the first seal is set to achieve reciprocating sealing to ensure that the liquid medium in the slide will not leak.

[0011] Furthermore, it also includes a second seal, the slide is a through hole, and the infusion loop also includes a processed perforation, the processed perforation connects the infusion loop with the outside, and the second seal closes the slide and the processed perforation; the processed perforation and the through-hole-shaped slide are inevitably formed when processing the infusion loop and the slide, and they do not participate in the process of active compensation of the damping motion mechanism, but the sealing of the processed perforation and the through hole will directly affect the effect of the liquid medium in absorbing kinetic energy. Therefore, a second seal is set for sealing. Since the oil pressure in the infusion loop is actually not large, the second sealing ring and the processed perforation and through hole can be effectively sealed by interference fit to the liquid medium.

[0012] Furthermore, sliding gap grooves are provided on both sides of the cavity of the limiting recessed part, and the touch panel is installed in the sliding gap groove. There is a gap between the bottom surface of the touch panel and the bottom surface of the sliding gap groove when the sliding door is in the open state; the sliding part can slide, and first of all, the touch panel needs to have a certain sliding space, and sliding gap grooves are dug out on both sides of the recessed block cavity to facilitate the sliding of the sliding part.

[0013] Furthermore, the adjusting part is an elastic part, one end of which is connected to the end face of the sliding arm, and the other end is connected to the bottom face of the slide; the adjusting part can also be an elastic part, which converts the kinetic energy of the vibration into the elastic potential energy of the elastic part through the elastic part. After the dynamic displacement is eliminated, the elastic part releases the potential energy and restores the deformation, which can also effectively reduce the vibration and abnormal noise during driving. When the elastic part is used as the adjusting part, there is no need to set up an infusion loop, but the elastic parts on both sides need to be in a compressed state when the sliding door is in a closed state to achieve the basic adjustment function.

[0014] Furthermore, a limiting protrusion is provided on the side of the sliding arm close to the touch plate, and a limiting groove is provided on the side of the slide, and the limiting protrusion abuts against the limiting groove; when the adjusting part is an elastic part, although there is no need to set a complex infusion loop in the limiting recess, a limiting structure is required to prevent the elastic part from completely popping out the sliding part when the sliding door is in the open state.

[0015] Furthermore, the limiting convex part includes a convex block and a first bottom plate, the first bottom plate is fixedly connected to the convex block, the limiting concave part includes a concave block and a second bottom plate, the second bottom plate is fixedly connected to the concave block, and the damping motion mechanism is installed in the concave block; the first bottom plate and the second bottom plate are both made of metal materials, the convex block and the concave block are both plastic, and the limiting convex part and the limiting concave part are both made of a composite molding process of metal and plastic.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The damping motion mechanism includes an adjustment part and a sliding part. The sliding part is slidably connected to the limiting concave part through the adjustment part, and the sliding part abuts against the limiting convex part. The damping motion mechanism constructs a sliding door limiting system with adaptive characteristics, effectively eliminating the multi-dimensional dynamic loads generated during vehicle driving and reducing vibration and abnormal noise during driving.

[0017] 2. The regulating part is a liquid medium. When the sliding part is subjected to dynamic load, the liquid medium can convert kinetic energy into heat energy through the effects of molecular friction and viscous resistance, which can effectively suppress high-frequency vibration and reduce the amplitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded view of a sliding door limit structure; Figure 2 A schematic diagram of the internal structure of a limiting concave member of a sliding door limiting structure when the adjusting portion is a liquid medium; Figure 3 A schematic diagram of the structure of a concave block of a sliding door limiting structure; Figure 4 This is a structural schematic diagram of a sliding door limiting structure with a sliding member having a reduced diameter portion; Figure 5 A schematic diagram of the internal structure of a limiting concave member of a sliding door limiting structure when the adjusting portion is an elastic member; Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0019] In the accompanying drawings: 100, limiting concave part; 110, slideway; 120, sliding gap groove; 130, concave block; 140, second bottom plate; 200, limiting convex part; 210, convex block; 220, first bottom plate; 300, damping motion mechanism; 310, adjustment part; 320, sliding part; 321, sliding arm; 322, touch plate; 323, reduced diameter part; 330, infusion loop; 331, processed perforation; 400, first sealing part; 500, second sealing part; 600, limiting protrusion; 700, limiting groove. DETAILED DESCRIPTION

[0020] The present invention is further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] Example 1 This embodiment is the first embodiment of a sliding door limiting structure. Figures 1 to 4As shown, it includes a limiting concave part 100 and a limiting convex part 200, one of the limiting concave part 100 and the limiting convex part 200 is installed on the vertical beam of the frame and the other is installed on the sliding door. The limiting concave part 100 and the limiting convex part 200 are connected when the sliding door is closed. It also includes a damping motion mechanism 300, and the damping motion mechanism 300 includes an adjusting part 310 and a sliding part 320. The sliding part 320 is arranged on both sides of the cavity inside the limiting concave part 100 and is slidably connected to the limiting concave part 100. The sliding parts 320 are all in contact with the limiting convex part 200, and the adjusting part 310 pushes the sliding part 320 to slide in the limiting concave part.

[0023] Specifically, the sliding member 320 includes a sliding arm 321 and a touch plate 322, the touch plate 322 abuts against the limiting protrusion 200, and slideways 110 are provided on both sides of the cavity of the limiting concave member 100. The adjustment part 310 is provided in the slideways 110 on both sides and abuts against the sliding arm 321; the touch plate 322 is made of pressure-resistant and impact-resistant material, and when it contacts the limiting protrusion 200, it can expand the contact area and transfer the load to the sliding arm 321, so that the sliding arm 321 slides in the slideway 110 and absorbs the kinetic energy of the impact through the adjustment part 310.

[0024] Specifically, sliding gap grooves 120 are provided on both sides of the cavity of the limiting recess 100, and the touch plate 322 is installed in the sliding gap groove 120. There is a gap between the bottom surface of the touch plate 322 and the bottom surface of the sliding gap groove 120 when the sliding door is in the open state; the sliding member 320 can slide, and first of all, the touch plate 322 needs to have a certain sliding space. The sliding gap grooves 120 are dug out on both sides of the cavity of the recess block 130 to facilitate the sliding of the sliding member 320.

[0025] Specifically, the limiting protrusion 200 includes a protrusion 210 and a first bottom plate 220, the first bottom plate 220 is fixedly connected to the protrusion 210, the limiting concave part 100 includes a concave block 130 and a second bottom plate 140, the second bottom plate 140 is fixedly connected to the concave block 130, and the damping motion mechanism 300 is installed in the concave block 130; the first bottom plate 220 and the second bottom plate 140 are both made of metal materials, the protrusion 210 and the concave block 130 are both plastic, and the limiting protrusion 200 and the limiting concave part 100 both adopt a composite molding process of metal and plastic.

[0026] The working principle of the sliding door limit structure of this embodiment is as follows: When the vehicle generates vibration excitation while driving on the road, the sliding door system generates dynamic displacement in the vertical direction relative to the door plane due to the action of mass inertia, and the damping motion mechanism 300 actively compensates for the dynamic displacement: the limiting protrusion 200 moves to one side in the cavity of the concave block 130, and applies a dynamic load to the touch plate 322 on this side, pushing the sliding arm 321 to generate a slight displacement inside along the constraint direction of the adjustment part 310, and the abutting adjustment part 310 on this side is then compressed and deformed to absorb the impact dynamic load, while the adjustment part 310 on the other side is extended, so that the touch plate 322 remains in contact with the protrusion 210. When the protrusion moves to the other side in the cavity of the concave block 130, the originally compressed adjustment part 310 releases pressure, gradually recovering from the compressed state to the initial state and then to the extended state, while the originally extended adjustment part 310 gradually becomes compressed.

[0027] The beneficial effects of this embodiment are as follows: the adjustment portion 310 converts the impact kinetic energy into heat energy or potential energy dissipation through the viscoelastic deformation of compression and extension, which can effectively buffer vibration shocks of different amplitudes, thereby dynamically absorbing the dynamic load and road excitation during vehicle driving to avoid abnormal noise caused by the collision between the sliding member 320 and the limiting recess 100, and effectively reduce abnormal vibration and noise during driving while retaining the positioning accuracy of the sliding door.

[0028] Example 2 This embodiment is a second embodiment of a sliding door limiting structure. Figures 2 to 4 As shown, the difference from Example 1 is that: Specifically, the adjustment part 310 is a liquid medium filled in the slide 110, and the liquid medium can be hydraulic oil. The damping motion mechanism 300 also includes an infusion loop 330, which is arranged in the limiting recess 100, and the infusion loop 330 connects the slides 110 on both sides; oil is a relatively high-quality adjustment part 310. When the sliding part 320 is subjected to a dynamic load, the liquid medium can convert kinetic energy into heat energy through the effects of molecular friction and viscous resistance, which can effectively suppress high-frequency vibrations and reduce the amplitude.

[0029] Specifically, the connection node between the infusion loop 330 and the slide 110 is located on the side of the slide 110, and a reduced diameter portion 323 is provided at the end of the sliding arm 321 away from the touch plate 322; due to the size and structure of the limiting recess 100, setting the connection node on the side of the slide 110 can increase the volume utilization rate of the limiting recess 100. The liquid medium in the slide 110 needs to enter the infusion loop 330, and the effective activity space of the liquid medium is only the space between the inner wall of the slide 110 and the outer wall of the sliding arm 321. The sliding arm 321 is provided with a reduced diameter portion 323. By reducing the volume of the sliding arm 321, the effective flow space of the liquid medium is increased, the flow shear resistance of the liquid medium is reduced, the fluidity of the liquid medium is improved, and it is more conducive to the liquid medium to flow back and forth between the infusion loop 330 and the slide 110.

[0030] Specifically, it also includes a first seal 400, which is installed on the side of the slide 110 close to the touch plate 322 and abuts against the sliding arm 321; there is a reciprocating sliding motion between the sliding arm 321 and the slide 110, and the first seal 400 is set to achieve reciprocating sealing to ensure that the liquid medium in the slide 110 will not leak.

[0031] Specifically, it also includes a second seal 500, the slide 110 is a through hole, and the infusion loop 330 also includes a processed perforation 331. The processed perforation 331 connects the infusion loop 330 with the outside, and the second seal 500 closes the slide 110 and the processed perforation 331; the processed perforation 331 and the through-hole-shaped slide 110 are inevitably formed when processing the infusion loop 330 and the slide 110. They do not participate in the active compensation process of the damping motion mechanism 300, but the sealing of the processed perforation 331 and the through hole will directly affect the effect of the liquid medium in absorbing kinetic energy. Therefore, the second seal 500 is set for sealing. Since the oil pressure in the infusion loop 330 is actually not large, the second sealing ring and the processed perforation 331 and the through hole can be effectively sealed by interference fit to the liquid medium.

[0032] The working principle of the sliding door limit structure of this embodiment is as follows: The damping motion mechanism 300 actively compensates for dynamic displacement: the limiting protrusion 200 moves to one side in the cavity of the concave block 130 and applies a dynamic load to the touch plate 322 on that side, pushing the sliding arm 321 to slide inward in the slide 110. The space of the slide 110 is reduced and squeezes the liquid medium. The liquid medium flows under pressure and flows from the liquid medium-filled space of the slide 110 through the infusion loop 330 to the slide 110 on the other side, and generates a driving force on the sliding arm 321 on the other side, pushing the sliding arm 321 on the other side to slide to the outside of the slide 110, so that the touch plate 322 moves in the moving direction of the protrusion 210 to keep the touch plate 322 on this side in contact with the protrusion 210.

[0033] Beneficial effects of this embodiment: When a liquid medium is selected as the regulating part 310, the friction between liquid molecules and the viscous resistance effect convert kinetic energy into heat energy, which can effectively suppress high-frequency vibration and reduce the amplitude.

[0034] Example 3 This embodiment is the first embodiment of a sliding door limiting structure. Figure 5 and 6 As shown, the difference from Example 1 is that: Specifically, the adjustment part 310 is an elastic part, which can be a spring. One end of the adjustment part 310 is connected to the end face of the sliding arm 321, and the other end is connected to the bottom face of the slide 110; the adjustment part 310 can also be an elastic part, which converts the kinetic energy of the vibration into the elastic potential energy of the elastic part through the elastic part. After the dynamic displacement is eliminated, the elastic part releases the potential energy and restores the deformation, which can also effectively reduce the vibration and abnormal noise during driving. When an elastic part is used as the adjustment part 310, there is no need to set the infusion loop 330, but the elastic parts on both sides need to be in a compressed state when the sliding door is in a closed state to achieve the basic adjustment function.

[0035] Specifically, a limiting protrusion 600 is provided on the side of the sliding arm 321 close to the touch plate 322, and a limiting groove 700 is provided on the side of the slide 110, and the limiting protrusion 600 abuts against the limiting groove 700; when the adjustment part 310 is an elastic part, although it is not necessary to set a complex infusion loop 330 in the limiting recess 100, a limiting structure is required to prevent the elastic part from completely popping out the sliding part 320 when the sliding door is in the open state.

[0036] The working principle of the sliding door limit structure of this embodiment is as follows: In the initial state, the elastic members are in an incompletely compressed state. The connection between the limiting protrusion 600 and the limiting groove 700 blocks the entire sliding member 320 to prevent it from being ejected. When the protrusion 210 is inserted into the cavity of the concave block 130, the two sides of the protrusion 210 abut against the touch plate 322 and compress the elastic member, pushing the sliding arm 321 to slide in the slideway 110 and continue to compress the elastic member. In this initial state, the elastic force of the elastic member can keep the touch plate 322 in stable contact with the protrusion 210, and the vehicle generates vibration excitation when it travels on the road. When excited, the damping motion mechanism 300 actively compensates for the dynamic displacement of the vibration: the limiting protrusion 200 moves to one side in the cavity of the recessed block 130, and applies a dynamic load to the touch plate 322 on this side, pushing the sliding arm 321 to produce a slight displacement along the constraint direction of the adjustment part 310 inside. The elastic part on this side continues to be compressed, converting the kinetic energy absorption into potential energy storage, while the elastic potential energy of the other side is relatively stretched and released, and the touch plate 322 is ejected in the direction away from the slide 110, so that it remains in contact with the protrusion 210.

[0037] The beneficial effects of this embodiment include the use of an elastic member as the adjustment portion 310. The reciprocating compression and extension of the elastic member converts impact kinetic energy into elastic potential energy, effectively suppressing vibration and reducing amplitude while also reducing component manufacturing costs. In the specific content of the above-mentioned specific embodiments, the various technical features can be combined in any non-contradictory manner. To simplify the description, not all possible combinations of the above-mentioned technical features are described. However, as long as these technical features do not conflict with each other, they should be considered to be within the scope of this specification.

[0038] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A sliding door limiting structure, comprising a limiting concave member (100) and a limiting convex member (200), wherein one of the limiting concave member (100) and the limiting convex member (200) is mounted on a vehicle frame vertical beam, and the other is mounted on the sliding door, wherein the limiting concave member (100) and the limiting convex member (200) are connected when the sliding door is in a closed state, and wherein: The damping motion mechanism (300) is also included. The damping motion mechanism (300) includes an adjusting portion (310) and a sliding member (320). The sliding member (320) is arranged on both sides of the cavity of the limiting concave member (100) and is slidably connected to the limiting concave member (100). The sliding members (320) are in contact with the limiting convex member (200). The adjusting portion (310) pushes the sliding member (320) to slide in the limiting concave member.

2. A sliding door limiting structure according to claim 1, characterized in that: The sliding member (320) includes a sliding arm (321) and a touch plate (322), the touch plate (322) abuts against the limiting convex member (200), and slideways (110) are provided on both sides of the cavity of the limiting concave member (100), and the adjusting portion (310) is provided in the slideways (110) on both sides and abuts against the sliding arm (321).

3. The sliding door limiting structure according to claim 2, characterized in that: The regulating portion (310) is a liquid medium filled in the slideway (110). The damping motion mechanism (300) further includes an infusion loop (330). The infusion loop (330) is arranged in the limiting recess (100). The infusion loop (330) is connected to the slideways (110) on both sides.

4. The sliding door limiting structure according to claim 3, characterized in that: The connection node between the infusion loop (330) and the slideway (110) is located on the side of the slideway (110), and a reduced diameter portion (323) is provided at one end of the sliding arm (321) away from the touch plate (322).

5. The sliding door limiting structure according to claim 3, characterized in that: It also includes a first sealing member (400), which is installed on a side of the slideway (110) close to the touch plate (322) and abuts against the sliding arm (321).

6. The sliding door limiting structure according to claim 3, characterized in that: The invention also includes a second sealing member (500), the slideway (110) is a through hole, the infusion loop (330) further includes a processed through hole (331), the processed through hole (331) connects the infusion loop (330) with the outside, and the second sealing member (500) seals the slideway (110) and the processed through hole (331).

7. The sliding door limiting structure according to claim 2, characterized in that: Sliding gap grooves (120) are provided on both sides of the cavity of the position-limiting recess (100), the touch panel (322) is installed in the sliding gap groove (120), and a gap exists between the bottom surface of the touch panel (322) and the bottom surface of the sliding gap groove (120) when the sliding door is in an open state.

8. The sliding door limiting structure according to claim 2, characterized in that: The adjusting portion (310) is an elastic member, one end of which is connected to the end surface of the sliding arm (321), and the other end of which is connected to the bottom surface of the slideway (110).

9. The sliding door limiting structure according to claim 8, characterized in that: A limiting protrusion (600) is provided on one side of the sliding arm (321) close to the touch plate (322), and a limiting groove (700) is provided on the side of the slideway (110), and the limiting protrusion (600) abuts against the limiting groove (700).

10. A sliding door limiting structure according to any one of claims 1 to 9, characterized in that: The position-limiting convex component (200) includes a convex block (210) and a first bottom plate (220), wherein the first bottom plate (220) is fixedly connected to the convex block (210); the position-limiting concave component (100) includes a concave block (130) and a second bottom plate (140), wherein the second bottom plate (140) is fixedly connected to the concave block (130); and the damping motion mechanism (300) is installed in the concave block (130).

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