A constant-reaction sliding door limiting block

Abstract

The application relates to a constant-reaction-force sliding door limiting block, wherein a door contact part is movably arranged on a vehicle body connecting part; a constant-reaction-force maintaining part is arranged in the vehicle body connecting part and connected with the door contact part through an elastic member; the constant-reaction-force maintaining part comprises a force transmission structure and a directional deformation energy absorption structure; the force transmission structure has protrusions in the moving direction, and grooves are formed between two adjacent protrusions; when the reaction force generated by compressing the elastic member by the door contact part is greater than the maximum energy absorption capacity, the directional deformation energy absorption structure is sequentially locked with the protrusions and deformed to absorb energy, so that the reaction force is gradually reduced until the reaction force is locked in the groove and does not exceed the maximum energy absorption capacity; when the reaction force is less than or equal to the maximum energy absorption capacity, the directional deformation energy absorption structure is locked in the groove, deformed to absorb energy when connected with the protrusion, and reset when connected with the groove, so that the final output value of the reaction force is constant, and the quality problem of the sliding door caused by the excessive or insufficient limiting reaction force is solved.

Description

Technical Field

[0001] This application relates to the field of automotive door components technology, and in particular to a sliding door limit block with constant reaction force. Background Technology

[0002] Currently, unlike traditional rotating hinged doors, sliding doors are connected to the car body via upper, middle, and lower hinge rollers and guide rails. The interaction between the rollers and guide rails is a highly flexible constraint, which means that after the sliding door is closed, it is prone to wobbling relative to the car body, leading to problems such as abnormal noises. To solve this problem, it is necessary to add limits and constraints to the sliding door when it is closed. One of the most important constraints is to install a sliding door limit block on the B-pillar of the car body to limit the sliding door's forward and backward movement.

[0003] Most existing sliding door limit blocks are non-adjustable, or have a small adjustment range and poor operability. This leads to a problem: the reaction force of the limit block varies with the gap between the sliding door and the B-pillar of the vehicle. A larger gap results in a smaller reaction force, insufficient door restraint, and vibrations and noises during driving; a smaller gap results in a larger reaction force, requiring more effort to manually close the sliding door or making a loud clicking sound when the electric unlocking mechanism clicks. Both situations affect the performance and perceived quality of the sliding door, leading to customer complaints.

[0004] Therefore, this patent addresses the above problems by proposing a sliding door limit block with constant reaction force, which solves the quality problems of sliding doors caused by excessive or insufficient limit reaction force. Summary of the Invention

[0005] This application provides a sliding door limit block with constant reaction force to solve the quality problems of sliding doors caused by excessive or insufficient limit reaction force in related technologies.

[0006] Firstly, a sliding door limit block with constant reaction force is provided, comprising:

[0007] Body connection parts;

[0008] The door contact portion is movably mounted on the body connecting portion;

[0009] A constant reaction force maintaining part is disposed within the body connection part and connected to the door contact part via an elastic element; the constant reaction force maintaining part includes a force transmission structure and a directional deformation energy absorption structure; the force transmission structure has protrusions spaced apart in the moving direction, and a groove is formed between two adjacent protrusions.

[0010] During the movement of the door contact portion, the directional deformation energy-absorbing structure deforms and absorbs energy when connected to the protrusion, and resets when connected to the groove, so that the final output value of the reaction force remains constant.

[0011] In some embodiments, the vehicle body connection portion includes a first cylindrical body with an opening at the top and a closed bottom.

[0012] The door contact portion includes a second cylinder that is closed at the top and open at the bottom, and the top of the first cylinder moves within the second cylinder.

[0013] The force transmission structure is arranged along the axial direction of the first cylinder and is connected to the inner bottom wall of the first cylinder.

[0014] The top of the directional deformation energy-absorbing structure is located above the force transmission structure, and the bottom is connected to the force transmission structure; the elastic element is provided between the top of the directional deformation energy-absorbing structure and the top wall of the second cylinder.

[0015] In some embodiments, the directional deformation energy-absorbing structure includes a disc spring and a pressure plate. The smaller diameter end of the disc spring is located on top and contacts the pressure plate. The outer edge of the larger diameter end is provided with a plurality of circumferentially distributed first locking holes. A second locking hole communicating with the first locking holes is provided in the radial direction of the disc spring. The diameter of the second locking hole is larger than that of the first locking hole.

[0016] During the movement of the door contact portion, the second locking hole is used to allow the protrusion to pass through, and the first locking hole is used to block the protrusion.

[0017] In some embodiments, the force transmission structure includes a plurality of circularly distributed cylindrical members, the diameter of which is equal to the diameter of the larger of the two ends of the disc spring;

[0018] The cylindrical component includes vertically evenly spaced beads, with a connecting cylinder between adjacent beads; the bottom of the lowest bead is also provided with a connecting cylinder; the diameter of the beads is larger than the diameter of the connecting cylinder.

[0019] In some embodiments, the pressure plate has an adjusting screw hole at its center; the top wall of the second cylinder has a third through hole;

[0020] The directional deformation energy-absorbing structure also includes an adjustable locking pin, which is connected to the adjusting screw hole.

[0021] In some embodiments, the vehicle body connection portion includes a solid column, a first vertical slide rail is provided inside the solid column along its axial direction, and a transverse mounting hole is provided on the outside of the solid column that is perpendicularly connected to the first vertical slide rail; one end of the solid column is provided with a first through hole that is connected to the first vertical slide rail.

[0022] The force transmission structure is located inside the first vertical slide and is coaxially arranged with the first vertical slide;

[0023] One end of the door contact portion passes through the first through hole and is connected to the force transmission structure through the elastic element;

[0024] The directional deformation energy-absorbing structure is located inside the transverse mounting hole and is connected to the protrusion or groove on the outside of the force transmission structure.

[0025] In some embodiments, the force transmission structure includes a cylindrical block, the interior of which is provided with a second vertical slide, and the top is provided with a second through hole; the outer surface of the cylindrical block is provided with the protrusion or groove on the side connected to the directional deformation energy absorption structure.

[0026] The elastic element is located in the second vertical slide rail; the door contact portion includes a sliding cylinder; one end of the sliding cylinder is provided with a limiting ring, which contacts the elastic element, and the other end is provided with a second through hole and a first through hole in sequence.

[0027] In some embodiments, the protrusion has an intersecting first horizontal plane and a first inclined plane, with the first horizontal plane located above the first inclined plane;

[0028] The directional deformation energy-absorbing structure includes a cover plate, a stop spring, and a stop block arranged axially along the transverse mounting hole. The stop block has a second horizontal surface and a second inclined surface, with the second horizontal surface located below the second inclined surface; the first inclined surface and the second inclined surface abut against each other.

[0029] In some embodiments, the end of the lateral mounting hole furthest from the force transmission structure is provided with an internal thread;

[0030] The directional deformation energy-absorbing structure also includes an adjusting nut that is threadedly connected to the internal thread, and a ball bearing is provided between the adjusting nut and the cover plate; the end face of the adjusting nut away from the cover plate is provided with a circular scale.

[0031] The stop block is also provided with a round block at the end away from the force transmission structure, and the round block is provided with a slot.

[0032] The solid column is provided with a vertically movable locking pin, which passes through the horizontal mounting hole and is inserted into the slot; the outer surface of the solid column is provided with a scale pointer.

[0033] In some embodiments, a stop roller is slidably provided between the first inclined surface and the second inclined surface.

[0034] The beneficial effects of the technical solution provided in this application include:

[0035] This application provides a sliding door limiting block with constant reaction force. The door contact portion is movable and mounted on the vehicle body connection portion; the constant reaction force maintaining portion is located within the vehicle body connection portion and connected to the door contact portion via an elastic element; the constant reaction force maintaining portion includes a force transmission structure and a directional deformation energy absorption structure; the force transmission structure has protrusions spaced apart in the moving direction, with a groove formed between adjacent protrusions; through this arrangement, during the movement of the door contact portion, when the reaction force generated by the compression of the elastic element exceeds the maximum energy absorption capacity, the directional deformation energy absorption structure successively abuts against and deforms against multiple protrusions to absorb energy, gradually reducing the reaction force until it is locked in the groove, at which point the reaction force does not exceed the maximum energy absorption capacity; when the reaction force is less than or equal to the maximum energy absorption capacity, the directional deformation energy absorption structure is locked in the groove. The directional deformation energy absorption structure deforms and absorbs energy when connected to the protrusions and resets when connected to the groove, ensuring a constant final output value of the reaction force, thus solving the sliding door quality problem caused by excessive or insufficient limiting reaction force. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the overall structure of the limiting block in Embodiment 2 provided in this application.

[0038] Figure 2 This is a schematic diagram of the internal structure of the limiting block in Embodiment 2 provided in this application.

[0039] Figure 3 Provided for the embodiments of this application Figure 2 Enlarged view of point A in the middle;

[0040] Figure 4 A schematic diagram of the limiting block with a stop roller provided in Embodiment 2 of this application;

[0041] Figure 5 This is a schematic diagram of the overall structure of the limiting block provided in Embodiment 1 of this application;

[0042] Figure 6 This is a schematic diagram of the internal structure of the limiting block provided in Embodiment 1 of this application;

[0043] Figure 7 A schematic diagram of the fit between the disc spring and the force transmission structure provided in the embodiments of this application;

[0044] Figure 8Provided for the embodiments of this application Figure 7 A schematic diagram in the B direction.

[0045] In the diagram: 1. Elastic element; 2. Directional deformation energy absorption structure; 200. Cover plate; 201. Stop spring; 202. Stop block; 203. Adjusting nut; 204. Round block; 205. Disc spring; 206. Stop roller; 207. First locking hole; 208. Second locking hole; 209. Pressure plate; 210. Adjustable locking pin; 3. Force transmission structure; 4. Solid column; 400. Locking pin rod; 5. First vertical slide; 6. Horizontal mounting hole; 7. First cylinder; 8. Second cylinder; 9. Sliding cylinder. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] First, we should have an understanding of the existing finite block technology:

[0048] Existing technology 1: The limiting block body is composed of a single structure, and its height is not adjustable. Its height fixed to the vehicle body is also not adjustable, and the amount of interference with the vehicle body is directly determined by the gap between the sliding door and the vehicle body. The limiting reaction force output to the sliding door varies drastically due to changes in the vehicle body's dimensions, resulting in some vehicles having excessively large limiting forces, causing heavy manual closing force and slamming locks when unlocking electrically; while others have insufficient limiting forces, causing vibration and abnormal noise from the sliding door during driving.

[0049] Existing technology 2: A helical spring is installed inside the limiting block. When the door is closed, the helical spring is compressed, thereby generating a limiting force on the door. The limiting force (spring compression reaction force) changes linearly with the change of body size, and cannot automatically adapt to the deviation of body size to output a constant limiting force.

[0050] Existing technology three: The connection between the limit block head and the base is a screw-fit connection. Twisting the limit block head can adjust the limit block's engagement height, thereby adjusting the limiting reaction force. This adjustment is done manually and blindly (the interference cannot be visually observed), requiring repeated closing of the tailgate to determine the limit block's engagement state. This results in a significant amount of time being spent on repeated adjustments. Even then, the adjusted limiting force value varies depending on the worker's experience. Especially with faster production cycles, workers may not have enough time to determine if the limit block is properly engaged, leading to inaccurate adjustments to the required height.

[0051] Existing technology four: The limiting block is disassembled into a fixed, immovable base and a sliding mating part. When the door is closed, the sliding mating part receives the pushing force of the door and slides relative to the fixed base (there is a certain sliding resistance between the two, requiring external force to slide; it cannot slide freely). This ensures that the sliding mating part is in just contact with the door. When the door is opened, rotating the sliding part in the opposite direction raises it to a certain height, achieving the ideal interference with the door, thus realizing the designed limiting force. After the door is adjusted, if the mating part needs to have interference with the door, it still needs to be manually rotated in the opposite direction. The automation level is not high enough, and the efficiency is low. In addition, the amount of reverse rotation is difficult to control accurately, and the output force value has a certain deviation.

[0052] The existing technologies 1 and 2 for sliding door limit blocks are not adjustable, and the output limit reaction force varies with the vehicle body dimensions. This results in some vehicles having excessively large limit forces, leading to heavy manual closing force and electric unlocking failures; while others have insufficient limit forces, causing sliding door vibration and abnormal noise during driving. Existing technologies 3 and 4 for sliding door limit blocks offer manual and semi-automatic adjustment. Technology 3 relies on blind adjustment based on experience, making it difficult to achieve the designed interference and limit forces. Technology 4 requires manual turning and locking, which is complex, affects production cycle time, and introduces errors, resulting in deviations in the interference and limit force output.

[0053] To address the above issues, the limiting block involved in this application has an internal structure similar to a stop valve that can directly sense the limiting force. When the limiting reaction force exceeds the design value, the structure similar to a stop valve opens, the limiting force falls back to the design value, and then the structure similar to a stop valve locks. This cycle ensures that the limiting force is always kept within the design range.

[0054] The limit block involved in this application automatically senses changes in force value through an internal structure similar to a stop valve, and automatically adjusts the force value. Its force value output does not require manual operation, thereby ensuring the accuracy of the force value and the automation of production.

[0055] The following is a step-by-step explanation; please refer to the following instructions:

[0056] A sliding door limit block with constant reaction force, comprising:

[0057] Body connection parts;

[0058] The door contact area is movable on the body connecting part;

[0059] The constant reaction force maintenance part is located in the body connection part and is connected to the door contact part through the elastic element 1; the constant reaction force maintenance part includes a force transmission structure 3 and a directional deformation energy absorption structure 2; the force transmission structure 3 has protrusions arranged at intervals in the moving direction, and a groove is formed between two adjacent protrusions.

[0060] During the movement of the door contact part, the directional deformation energy-absorbing structure 2 deforms and absorbs energy when connected to the protrusion, and resets when connected to the groove, so that the final output value of the reaction force is constant.

[0061] The above settings ensure that during the movement of the door contact part, when the reaction force generated by the compression elastic element 1 of the door contact part exceeds the maximum energy absorption capacity, the directional deformation energy absorption structure 2 successively abuts against and deforms against multiple protrusions to absorb energy, thereby gradually reducing the reaction force until it is locked in the groove. At this point, the reaction force does not exceed the maximum energy absorption capacity. When the reaction force is less than or equal to the maximum energy absorption capacity, the directional deformation energy absorption structure 2 is locked in the groove. The directional deformation energy absorption structure 2 deforms and absorbs energy when connected to the protrusion and resets when connected to the groove, so that the final output value of the reaction force is constant, thus solving the quality problem of sliding doors caused by excessive or insufficient limiting reaction force.

[0062] Furthermore, it should be understood that the maximum energy absorption capacity of the directional deformation energy-absorbing structure 2 can be set according to needs, and the maximum energy absorption capacity will vary depending on different requirements. Therefore, the simple structural design, without any digital circuitry, automatically adjusts the limit reaction force based on the maximum energy absorption capacity, so that the final force output does not require manual operation, thereby ensuring the accuracy of the force value and the automation of production.

[0063] To implement the above two structural methods, this application includes, but is not limited to, the following two specific embodiments.

[0064] Example 1, Reference Figures 5-8

[0065] The vehicle body connection includes a first cylinder 7 with an open top and a closed bottom; the directional deformation energy absorption structure 2 includes a disc spring 205 and a pressure plate 209, with the smaller diameter end of the disc spring 205 located at the top and in contact with the pressure plate 209; the outer edge of the larger diameter end is provided with a plurality of circumferentially distributed first locking holes 207; a second locking hole 208 communicating with the first locking holes 207 is provided in the radial direction of the disc spring 205; the diameter of the second locking hole 208 is larger than that of the first locking hole 207;

[0066] During the movement of the door contact portion, the second locking hole 208 is used to allow the protrusion to pass through, and the first locking hole 207 is used to block the protrusion. The door contact portion includes a second cylindrical body 8 that is closed at the top and open at the bottom, and the top of the first cylindrical body 7 moves within the second cylindrical body 8; the force transmission structure 3 is arranged along the axial direction of the first cylindrical body 7 and is connected to the inner bottom wall of the first cylindrical body 7; the top of the directional deformation energy absorption structure 2 is located above the force transmission structure 3, and the bottom is connected to the force transmission structure 3; an elastic element 1 is provided between the top of the directional deformation energy absorption structure 2 and the inner top wall of the second cylindrical body 8.

[0067] The force transmission structure 3 includes multiple cylindrical members arranged in a circle, the diameter of which is equal to the diameter of the larger diameter end of the disc spring 205.

[0068] The cylindrical component includes vertically evenly spaced beads, with a connecting cylinder between adjacent beads; the bottom of the lowest bead is also provided with a connecting cylinder; the diameter of the beads is larger than the diameter of the connecting cylinder.

[0069] The pressure plate 209 has an adjustment screw hole at its center; the top wall of the second cylinder 8 has a third through hole; the directional deformation energy absorption structure 2 also includes an adjustable locking pin 210, which is connected to the adjustment screw hole.

[0070] During the closing process of the sliding door, the second cylinder 8 is pushed to compress the elastic element 1, generating a limiting reaction force F1. This reaction force compresses the disc spring 205 through the pressure plate 209 inside the limiting block. The disc spring has keyholes around its circumference, including a first locking hole 207 and a second locking hole 208 that are interconnected. Each keyhole fits onto a beaded stop rod, which is a cylindrical component. See details for the fitting process. Figure 8 .

[0071] Initially, the disc spring 205 is in an uncompressed state, and the first locking hole 207 engages with the connecting cylinder, blocking the beads in a limited position. When F1 exceeds the set F0, the disc spring 205 is compressed, and the second locking hole 208 moves radially outward. The diameter of the second locking hole 208 is larger than the diameter of the beads, and the disc spring 205 slides through the second locking hole 208 to the next bead. The compression of the disc spring decreases, and it returns radially to its original position, restoring the engagement relationship between the first locking hole 207 and the connecting cylinder, and is limited again. At this time, the limiting force F1 falls back below F0.

[0072] The beaded stop rod is designed with several spherical pins at the top and bottom to ensure that the limiting force remains near F0 when the compression of the limiting block changes.

[0073] The structural parameters of the sliding door limit block must meet the following formula:

[0074] F0=K1(λ1+ΔH=F2;

[0075]

[0076]

[0077] In the above formula, F2 is the disc spring load in N, E is the elastic modulus in MPa, μ is Poisson's ratio, D is the outer diameter of the disc spring in mm, d is the inner diameter of the disc spring in mm, h0 is the cone height of the disc spring in mm, t is the thickness of the disc spring in mm, f is the deformation in mm, K1 is the calculation coefficient, and ΔS is the lateral distance between the large keyhole and the stop rod before compression in mm.

[0078] When the sliding door closes and reopens once, the limit block force value is automatically adjusted. At this point, the adjustable lock pin 210 can be screwed to the bottom through the third through hole at the top to lock the disc spring 205, preventing the disc spring 205 from sliding into the next level bead when the door vibrates, thus affecting the limit force.

[0079] The advantage of this scheme is its simple structure and the fact that force is transmitted in a straight line, making it more direct and efficient.

[0080] Example 2, please refer to Figures 1-4 .

[0081] The body connection part includes a solid column 4, with a fixed rubber block at the bottom of the solid column 4; a first vertical slide 5 along its axial direction is provided inside the solid column 4, and a transverse mounting hole 6 perpendicularly communicating with the first vertical slide 5 is provided on the outside of the solid column 4; a first through hole communicating with the first vertical slide 5 is provided at one end of the solid column 4; a force transmission structure 3 is located inside the first vertical slide 5 and is coaxially arranged with the first vertical slide 5; one end of the door contact part passes through the first through hole and is connected to the force transmission structure 3 through an elastic element 1;

[0082] The directional deformation energy-absorbing structure 2 is located inside the transverse mounting hole 6 and is connected to the protrusion or groove on the outside of the force transmission structure 3.

[0083] The above description of the door contact parts, located within the body connection section, illustrates the specific installation location of each component.

[0084] The force transmission structure 3 includes a cylindrical block with a second vertical slide inside and a second through hole at the top. A protrusion or groove is provided on the side of the outer surface of the cylindrical block that is connected to the directional deformation energy absorption structure 2. The elastic element 1 is located in the second vertical slide. The door contact part includes a sliding cylinder 9. One end of the sliding cylinder 9 is provided with a limiting ring that contacts the elastic element 1. The other end is sequentially provided with a second through hole and a first through hole and is connected to a buffer rubber block.

[0085] The protrusion has an intersecting first horizontal surface and a first inclined surface, with the first horizontal surface located above the first inclined surface; the directional deformation energy absorption structure 2 includes a cover plate 200, a stop spring 201, and a stop block 202 arranged axially along the transverse mounting hole 6, with the stop block 202 having a second horizontal surface and a second inclined surface, with the second horizontal surface located below the second inclined surface; the first inclined surface and the second inclined surface abut against each other.

[0086] The above structure, similar to ratchet teeth, ensures unidirectional movement. When the stop spring 201 deforms and is compressed, the stop block 202 enters the transverse mounting hole 6, moving downwards. This downward movement causes the stop spring 201 to lose its supporting force, resetting the stop block 202. This process gradually reduces the reaction force. The connection with the protrusion refers to the first and second inclined surfaces abutting against each other; the connection with the groove refers to the second horizontal surface abutting against the first horizontal surface.

[0087] Furthermore, to provide adjustable capabilities and adaptability to different needs, the following settings are also available:

[0088] The end of the transverse mounting hole 6 furthest from the force transmission structure 3 has an internal thread.

[0089] The directional deformation energy absorption structure 2 also includes an adjusting nut 203 that is threadedly connected to the internal thread, and a ball bearing is provided between the adjusting nut 203 and the cover plate 200; the end face of the adjusting nut 203 away from the cover plate 200 is provided with a circular scale.

[0090] The end of the stop block 202 away from the force transmission structure 3 is also provided with a round block 204, and the round block 204 is provided with a slot.

[0091] The solid column 4 is provided with a vertically movable locking pin 400, which passes through the horizontal mounting hole 6 and is inserted into the slot; the outer surface of the solid column 4 is provided with a scale pointer.

[0092] During adjustment, remove the locking pin 400, then rotate the adjusting nut 203 and adjust it to the desired value according to the scale pointer and circular scale to change the maximum energy absorption capacity of the stop block 202 protrusion.

[0093] Furthermore, a stop roller 206 is slidably provided between the first inclined surface and the second inclined surface; this changes the cooperation between the first inclined surface and the second inclined surface from sliding to rolling, reducing the force loss transmitted by the helical teeth.

[0094] During the closing process of the sliding door, the door contact part is compressed, which in turn compresses the elastic element 1 to generate a limiting reaction force F1. This reaction force pushes the force transmission structure 3, including the cylindrical block, downward within the solid column 4. Through the cooperation of the first and second inclined surfaces, it pushes the circular block 204 to slide laterally. The circular block 204 compresses the stop spring 201 to generate a lateral stopping force F2. When F1 exceeds the set F0, the wedge-shaped stop block 202 slides down and embeds into the groove formed by the two protrusions of the next stage, ensuring that the limiting force F1 falls back below F0. The stiffness coefficient λ and structural parameters of each spring in the sliding door limiting block satisfy the following formula, ensuring that the limiting block outputs a constant reaction force F0 when the engagement height changes.

[0095] F0=K1(λ1+ΔH=F2

[0096] F2=K2(λ1+N)sinαcosα

[0097]

[0098] Where F0 is the design limiting force / N, ΔH is the remainder of the compression amount of the door contact part divided by M, K1 and K2 are the stiffness coefficients of elastic element 1 and stop spring 201, respectively, λ1 and λ2 are the pre-compression amounts of the three springs / mm, and α, M, and N are the helical tooth angle and dimensions, see Figure 4 .

[0099] When the sliding door is closed and reopened, the limit block force value is adaptively completed. At this time, the locking pin 400 can be inserted into the corresponding slot. The slots of the round block 204 are distributed along the axis to lock the stop block 202 and prevent the stop valve from sliding into the next level of helical teeth when the door vibrates, thus affecting the limit force.

[0100] Rotating the adjusting nut 203 changes λ2, and thus F0. The nut's circumference is marked with evenly spaced graduations. By compressing the door contact area with a force gauge, the limiting force F0 corresponding to different graduations can be calibrated. The calibration results are imprinted on the nut's graduations. (See...) Figure 3 In subsequent use, the output force value F0 of the limit block can be adjusted by adjusting the nut according to the scale. In this way, the same limit block can be applied to door covers with different needs, greatly enhancing its versatility.

[0101] When the limit block needs to be re-adapted, unscrew the adjusting nut 203, remove the directional deformation energy-absorbing structure 2, invert the door contact part, let it slide back to the original position by gravity, and then reinstall it.

[0102] The advantages of this solution are that the limiting force is easy to adjust and it has good versatility.

[0103] Both of the above embodiments can solve the problems mentioned above, but in practical applications, Embodiment 1 is the best form to implement.

[0104] Based on the above description, this invention provides a sliding door limit block with a constant output of limiting reaction force according to design requirements. In this way, the limiting force on the sliding door is not affected by the vehicle body size, thus solving quality problems such as large manual closing force, electric unlocking lock malfunction, and abnormal vibration and noise of the sliding door during driving caused by the deviation of the limiting force.

[0105] The limiting block involved in this invention has a high degree of automation and versatility. The limiting force value is automatically output by the internally pre-designed structural parameters without manual adjustment, and the force value output is accurate, which improves production efficiency. In addition, the force value of the limiting block can still be visually adjusted within a certain range after the product is formed to meet the needs of different scenarios and force values, thus having a high degree of versatility.

[0106] This application also proposes a vehicle using this structure, and the above limiting structure can also be applied to other applicable fields.

[0107] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0108] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0109] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A sliding door limit block with constant reaction force, characterized in that, It includes: Body connection parts; The door contact portion is movably mounted on the body connecting portion; The constant reaction force maintenance part is set in the body connection part and connected to the door contact part through the elastic element (1); the constant reaction force maintenance part includes a force transmission structure (3) and a directional deformation energy absorption structure (2); the force transmission structure (3) has protrusions spaced apart in the moving direction, and a groove is formed between two adjacent protrusions; During the movement of the door contact portion, the directional deformation energy-absorbing structure (2) deforms and absorbs energy when connected to the protrusion, and resets when connected to the groove, so that the final output value of the reaction force is constant.

2. The sliding door limit block with constant reaction force as described in claim 1, characterized in that: The vehicle body connection part includes a first cylinder (7) with an opening at the top and a closed bottom; The door contact portion includes a second cylinder (8) that is closed at the top and open at the bottom, and the top of the first cylinder (7) moves within the second cylinder (8); The force transmission structure (3) is arranged along the axial direction of the first cylinder (7) and is connected to the inner bottom wall of the first cylinder (7); The top of the directional deformation energy-absorbing structure (2) is located above the force transmission structure (3), and the bottom is connected to the force transmission structure (3); the elastic element (1) is provided between the top of the directional deformation energy-absorbing structure (2) and the inner top wall of the second cylinder (8).

3. The sliding door limiting block with constant reaction force as described in claim 2, characterized in that: The directional deformation energy absorption structure (2) includes a disc spring (205) and a pressure plate (209). The smaller diameter end of the disc spring (205) is located on top and contacts the pressure plate (209). The outer edge of the larger diameter end is provided with a plurality of circumferentially distributed first locking holes (207). A second locking hole (208) communicating with the first locking holes (207) is provided in the radial direction of the disc spring (205). The diameter of the second locking hole (208) is larger than that of the first locking hole (207). During the movement of the door contact portion, the second locking hole (208) is used to allow the protrusion to pass through, and the first locking hole (207) is used to block the protrusion.

4. The sliding door limit block with constant reaction force as described in claim 3, characterized in that: The force transmission structure (3) includes a plurality of cylindrical members arranged in a circle, the diameter of which is equal to the diameter of the larger end of the disc spring (205); The cylindrical component includes vertically evenly spaced beads, with a connecting cylinder between adjacent beads; the bottom of the lowest bead is also provided with a connecting cylinder; the diameter of the beads is larger than the diameter of the connecting cylinder.

5. The sliding door limit block with constant reaction force as described in claim 3, characterized in that: The pressure plate (209) has an adjusting screw hole at its center; the top wall of the second cylinder (8) has a third through hole; The directional deformation energy-absorbing structure (2) also includes an adjustable locking pin (210), which is connected to the adjusting screw hole.

6. The sliding door limit block with constant reaction force as described in claim 1, characterized in that: The vehicle body connection part includes a solid column (4), a first vertical slide rail (5) is provided inside the solid column (4) along its axial direction, and a transverse mounting hole (6) is provided on the outside of the solid column (4) that is perpendicularly connected to the first vertical slide rail (5); one end of the solid column (4) is provided with a first through hole that is connected to the first vertical slide rail (5); The force transmission structure (3) is located inside the first vertical slide (5) and is coaxially arranged with the first vertical slide (5); One end of the door contact portion passes through the first through hole and is connected to the force transmission structure (3) through the elastic element (1); The directional deformation energy-absorbing structure (2) is located inside the transverse mounting hole (6) and is connected to the protrusion or groove on the outside of the force transmission structure (3).

7. The sliding door limit block with constant reaction force as described in claim 6, characterized in that: The force transmission structure (3) includes a cylindrical block, the interior of which is provided with a second vertical slide, and the top is provided with a second through hole; the outer surface of the cylindrical block is provided with the protrusion or groove on the side connected to the directional deformation energy absorption structure (2); The elastic element (1) is located in the second vertical slide; the door contact part includes a sliding cylinder (9); one end of the sliding cylinder (9) is provided with a limiting ring, which contacts the elastic element (1), and the other end is provided with a second through hole and a first through hole in sequence.

8. The sliding door limit block with constant reaction force as described in claim 6, characterized in that: The protrusion has an intersecting first horizontal plane and a first inclined plane, with the first horizontal plane located above the first inclined plane; The directional deformation energy absorption structure (2) includes a cover plate (200), a stop spring (201), and a stop block (202) arranged axially along the transverse mounting hole (6). The stop block (202) has a second horizontal surface and a second inclined surface, with the second horizontal surface located below the second inclined surface; the first inclined surface and the second inclined surface abut against each other.

9. The sliding door limit block with constant reaction force as described in claim 8, characterized in that: The transverse mounting hole (6) has an internal thread at the end away from the force transmission structure (3); The directional deformation energy absorption structure (2) also includes an adjusting nut (203) that is threadedly connected to the internal thread, and a ball is provided between the adjusting nut (203) and the cover plate (200); the end face of the adjusting nut (203) away from the cover plate (200) is provided with a circular scale; The stop block (202) is further provided with a round block (204) at one end away from the force transmission structure (3), and the round block (204) is provided with a slot; The solid column (4) is provided with a vertically movable locking pin (400), which passes through the horizontal mounting hole (6) and is inserted into the slot; a scale pointer is provided on the outer surface of the solid column (4).

10. The sliding door limiting block with constant reaction force as described in claim 8, characterized in that: A stop roller (206) is slidably provided between the first inclined surface and the second inclined surface.

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