A sliding door concave-convex position limiter

Abstract

The utility model relates to the technical field of automobile parts, and specifically is a sliding door concave-convex positioner. The chassis and the shell enclose a containing cavity extending along the sliding door direction, the cavity is equipped with the slider that can reciprocate, the slider is returned by the spring, and the upper and lower sides of the shell are equipped with the buffer block. The shell is provided with a contact mounting port and is installed with a contact assembly, the contact assembly includes the contact a, the contact b, the contact c and the contact d arranged from top to bottom, and the trigger part on the slider actuates each contact in turn with displacement to realize conduction or disconnection. The contacts are respectively connected to the vehicle port by the blue wire, the yellow wire, the white wire and the black wire through the wire harness assembly and are electrically connected with the vehicle. The shell and the chassis form a guide structure to constrain the linear motion of the slider, and the chassis, the shell and the contact mounting port are combined mounting structures. The scheme realizes the sliding door stroke detection and the door lock signal output in a single module, has the advantages of high environmental adaptability, stable electrical contact, end buffering, convenient assembly and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a sliding door recess and protrusion limiter. Background Technology

[0002] Door limiters are crucial components of car doors, connecting both the door and the body. They control the degree to which the door opens, significantly influencing the customer's door opening and closing experience. An existing door limiter structure (publication number: CN209620936U) suffers from the following inconveniences during use: Sliding doors are widely used in multi-purpose passenger vehicles, vans, and urban delivery vehicles. To ensure the safety and reliability of the opening and closing process, vehicles typically need to detect the sliding door's travel position and output status signals such as door opening, closing, and door lock / unlock to the vehicle controller; at the same time, a buffer is also needed at the end of the closing process to reduce impact and rebound. Existing technologies generally employ two implementation paths: one uses distributed position sensors (such as reed switches, Hall effect sensors, or photoelectric sensors) arranged separately in conjunction with the door lock actuator; the other uses mechanical limit switches or elastic contact structures to achieve on / off switching, and then leads the signal to the vehicle control system via wiring harnesses.

[0003] However, the above solutions suffer from the following common problems under long-term service and complex operating conditions: dispersed structure and poor fault tolerance. Limit detection and door lock control are mostly separate components, installed in various locations on the door and vehicle body. Accumulated tolerances result in a narrow travel recognition window and poor assembly consistency, easily leading to "positioning failure" or false triggering. The sliding door guide rail area is susceptible to dust, mud, salt spray, and temperature differences. Separate sensors or exposed contacts have long sealing paths and weak protection, easily leading to failure modes such as poor contact, short circuits, and condensation corrosion. Mechanical contacts are often single contact groups or structures with unclear travel switching, making them prone to vibration and sparking under vibration and shock conditions, resulting in vibration signals or premature contact erosion. Existing devices mostly only detect the position signal; door locking / unlocking is often achieved through another set of switches or sensors, resulting in long control links, complex wiring harnesses, and inconvenient vehicle layout and diagnostics. Many structures rely solely on hard limits or single-stage rubber pads, resulting in large impacts and significant rebound at the end of door closing, affecting NVH and lifespan, and negatively impacting contact stability. The large number of components, connectors, and wiring harnesses makes assembly and after-sales disassembly complex. Water ingress or damage to individual parts often necessitates extensive disassembly and inspection, resulting in high replacement costs. Furthermore, the contacts and wiring harnesses are frequently non-modular, lacking convenient assembly / disassembly ports or standardized interfaces, hindering platformization and versatility. Utility Model Content

[0004] The main purpose of this utility model is to provide a sliding door concave-convex limiter, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A sliding door recess limiter includes a chassis, a housing, and a vehicle receiving port. The chassis and housing cooperate to form a receiving cavity extending in the opening and closing direction of the sliding door. A reciprocating slider is provided in the receiving cavity. A spring is provided in the return direction of the slider. Buffer blocks are provided on the upper and lower sides of the housing. The housing is provided with a contact mounting port and a contact assembly installed therein. The contact assembly includes contacts a, b, c, and d arranged from top to bottom in the sliding slider movement direction. The slider has a trigger part that sequentially actuates each contact to make the contact assembly sequentially conduct or disconnect. The contact assembly is connected to a wiring harness assembly, and contacts a, b, c, and d correspond to blue, yellow, white, and black wires, respectively, and are connected to the vehicle receiving port for electrical connection with the vehicle control system.

[0006] Furthermore, the spring is a compression spring arranged along the direction of slider movement, and it abuts against the slider, the outer shell, and the chassis respectively.

[0007] Furthermore, the buffer block is made of an elastomer and contacts the inner limiting surface of the housing at the end of the slider's stroke.

[0008] Furthermore, the receiving port is a multi-core connector and is fixedly connected to the wiring harness assembly.

[0009] Furthermore, a guide structure is provided between the outer shell and the chassis to constrain the slider to move only in a straight line along the opening and closing directions.

[0010] Furthermore, the chassis, housing, and contact mounting ports are modularly assembled for easy disassembly.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The chassis and outer shell form a housing cavity, with the slider, spring, buffer block, contact assembly, and wiring harness assembly all concentrated within the same housing. Limit detection and signal output are performed on the same reference component, ensuring a unified assembly reference and significantly reducing the risk of tolerance overlap and misalignment caused by multiple dispersed installations on the door / body, resulting in better consistency.

[0012] The contact assembly is mounted inside the contact mounting port on the housing, and the entire assembly is surrounded by the housing and chassis. Compared to exposed switches / sensors, the dust and water exposure area and path of the contacts are significantly shortened; maintenance / replacement is completed at the mounting port, eliminating the need for exposed long wire terminations and reducing the impact of the environment on contact stability.

[0013] A guide structure is installed between the outer casing and the chassis to constrain the slider to move linearly only in the opening / closing direction; the slider is equipped with a trigger unit, causing contacts a / b / c / d to sequentially turn on or off as the displacement occurs. The slider's movement trajectory is stable, and the contact action position is clear, reducing jitter and false triggering; segmented triggering can open different state windows, making it easier for the controller to determine stability.

[0014] Four contacts (a, b, c, and d) are set within the same contact component, and multi-stage signal output is achieved by sequential triggering of sliders. A single module can simultaneously output multiple signals such as open / close travel and door lock related signals, reducing independent sensors and wiring harness branches, resulting in shorter control links and more centralized diagnostics.

[0015] Buffer blocks, made of elastomers, are installed on the upper and lower sides of the outer casing. These blocks contact the limiting surface inside the casing at the end of the stroke to absorb energy. The slider returns to its original position under the preload of the spring. The impact at the end of closing is absorbed by the elastic buffer and the spring return, reducing rebound and impact peak, improving NVH, and facilitating stable conduction of the contacts at the end.

[0016] The chassis, housing, and contact mounting ports feature a modular installation structure for easy assembly and disassembly. The wiring harness assembly connects to the vehicle via a multi-core connector. Wear parts such as contacts and sliders can be quickly replaced through the mounting ports, and the entire unit can be replaced as a sub-assembly. Connection to the vehicle body is plug-and-play, minimizing after-sales downtime and reducing maintenance costs.

[0017] Contacts a / b / c / d are electrically connected to blue / yellow / white / black wires respectively, and are uniformly integrated into the vehicle receiving port wiring and quality inspection visualization, reducing the probability of incorrect wiring; port standardization facilitates platformization and cross-model reuse, enabling rapid assembly and rapid replacement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the outer shell and chassis structure of this utility model; Figure 3 This is an enlarged view of point A in this utility model; Figure 4 This is the right view of the present invention; Figure 5 This is the left view of the present invention; In the diagram: 1. Chassis; 2. Housing; 3. Vehicle receiving port; 4. Wiring harness assembly; 5. Buffer block; 6. Contact; 7. Spring; 8. Slider; 9. Contact mounting port; 41. Blue wire; 42. Yellow wire; 43. White wire; 44. Black wire; 61. Contact a; 62. Contact b; 63. Contact c; 64. Contact d. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0022] Please see Figure 1-5 This utility model provides a technical solution: A sliding door recess limiter includes a chassis 1, a housing 2, and a vehicle receiving port 3. The chassis 1 and the housing 2 cooperate to form a receiving cavity extending in the opening and closing direction of the sliding door. A reciprocating slider 8 is provided in the receiving cavity. A spring 7 is provided in the return direction of the slider 8. Buffer blocks 5 are provided on the upper and lower sides of the housing 2. The housing 2 is provided with a contact mounting port 9 and a contact 6 assembly installed therein. The contact 6 assembly includes contacts a61, b62, c63, and d64 arranged from top to bottom in the movement direction of the slider 8. The slider 8 has a trigger part that sequentially actuates each contact to make the contact 6 assembly sequentially conduct or disconnect. The contact 6 assembly is connected to a wiring harness assembly 4, and contacts a61, b62, c63, and d64 correspond to blue wire 41, yellow wire 42, white wire 43, and black wire 44, respectively, and are connected to the vehicle receiving port 3 for electrical connection with the vehicle control system.

[0023] Furthermore, the spring 7 is a compression spring arranged along the movement direction of the slider 8, and it abuts against the slider 8, the outer shell 2, and the chassis 1 respectively.

[0024] Furthermore, the buffer block 5 is made of an elastomer and contacts the inner limiting surface of the housing 2 at the end of the stroke of the slider 8.

[0025] Furthermore, the receiving port 3 is a multi-core connector and is fixedly connected to the wiring harness assembly 4.

[0026] Furthermore, a guide structure is provided between the outer shell 2 and the chassis 1 to constrain the slider 8 to move only in a straight line along the opening and closing directions.

[0027] Furthermore, the chassis 1, the outer shell 2, and the contact mounting port 9 are assembled in a modular manner for easy disassembly.

[0028] like Figures 1 to 5 As shown, the sliding door retainer in this embodiment includes a base 1 and a housing 2, which are connected by screws or snap-fits to form a receiving cavity. A slider 8 is installed within the receiving cavity, and the slider 8 can reciprocate linearly along the opening / closing direction of the sliding door. Linear guide surfaces or guide ribs are provided on both sides of the slider 8 between the housing 2 and the base 1 to ensure that the slider 8 moves only in the stated direction. A spring 7 is arranged in the return direction of the slider 8. The spring 7 is a compression spring, with one end abutting against the slider 8 and the other end abutting against the housing 2 or the base 1, forming a preload to enable the slider 8 to return to its original position.

[0029] Buffer blocks 5 are respectively provided on the upper and lower sides of the outer shell 2. The buffer blocks 5 are elastic components. When the slider 8 approaches the end of its stroke, the buffer blocks 5 and the inner limiting surface of the outer shell 2 are gradually compressed to absorb kinetic energy. Combined with the return action of the spring 7, the buffer is buffered in stages to suppress the impact and rebound at the end of the closing.

[0030] The outer casing 2 has a contact mounting port 9. Contacts 6 are mounted at the contact mounting port 9 and extend into the receiving cavity. Contacts 6 are elastic contact pieces or equivalent structures. Four independent contacts 6 are arranged from top to bottom along the movement direction of the slider 8: contact a61, contact b62, contact c63, and contact d64. A triggering part is formed on the slider 8 to sequentially actuate the contacts. The triggering part can be a stepped flange or a beveled push block. When the slider 8 moves linearly under the guide, the triggering part sequentially presses against contacts a61, b62, c63, and d64, achieving conduction or disconnection according to the displacement stage. To ensure clear action, the center distance between contacts a61 and d64 matches the displacement stroke of the slider 8, ensuring that the operating ranges of each contact do not interfere with each other.

[0031] The wiring harness assembly 4 is electrically connected to the contact 6. For ease of identification and assembly, contact a61 is led out via blue wire 41, contact b62 via yellow wire 42, contact c63 via white wire 43, and contact d64 via black wire 44. Blue wire 41, yellow wire 42, white wire 43, and black wire 44 converge within the housing 2 to form the wiring harness assembly 4, which is then connected to the vehicle receiving port 3. The vehicle receiving port 3 is preferably a multi-core connector, whose shape and positioning structure are adapted to the vehicle wiring harness, enabling a one-click electrical connection.

[0032] When the sliding door is in use and moves open or close relative to this limiter, the actuator on the door side pushes the slider 8 to move linearly along the guide. During the displacement, the triggering part acts sequentially on contacts a61, b62, c63, and d64, and the on / off state of each stage is sent to the receiving port 3 via the wiring harness assembly 4 through the blue wire 41, yellow wire 42, white wire 43, and black wire 44 and enters the vehicle control system. The vehicle control system can map different combinations of contacts a61 to d64 to one or more of the following: door opening permission, door closing permission, lock trigger, and unlock trigger, realizing the linkage between sliding door travel recognition and door lock control. At the end of the closing phase, the buffer block 5 is compressed and absorbs energy, and with the return action of the spring 7, the slider 8 is stably held at the end, and the contact 6 maintains reliable conduction or disconnection, avoiding vibration.

[0033] The foregoing description and illustrations of this utility model illustrate its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sliding door recess and protrusion limiter, comprising a chassis (1), a housing (2), and a vehicle receiving port (3), characterized in that: The chassis (1) and the outer shell (2) cooperate to form a receiving cavity extending in the opening and closing direction of the sliding door. A reciprocating slider (8) is provided in the receiving cavity. A spring (7) is provided in the return direction of the slider (8). Buffer blocks (5) are provided on the upper and lower sides of the outer shell (2). The outer shell (2) is provided with a contact mounting port (9) and a contact (6) assembly installed therein. The contact (6) assembly includes contact a (61) arranged from top to bottom in the movement direction of the slider (8). Contacts b (62), c (63), and d (64) are provided. The slider (8) has a trigger part that actuates each contact in sequence to make the contact (6) assembly turn on or off in sequence. The contact (6) assembly is connected to the wiring harness assembly (4), and contacts a (61), b (62), c (63), and d (64) correspond to the blue wire (41), yellow wire (42), white wire (43), and black wire (44) respectively and are connected to the vehicle receiving port (3) and electrically connected to the vehicle control system.

2. The sliding door recessed limiter according to claim 1, characterized in that: The spring (7) is a compression spring arranged along the movement direction of the slider (8), and it abuts against the slider (8), the outer shell (2), and the chassis (1) respectively.

3. The sliding door recessed limiter according to claim 1, characterized in that: The buffer block (5) is made of an elastomer and contacts the inner limiting surface of the housing (2) at the end of the stroke of the slider (8).

4. The sliding door recessed limiter according to claim 1, characterized in that: The receiving port (3) is a multi-core connector and is fixedly connected to the wiring harness assembly (4).

5. A sliding door recessed limiter according to claim 1, characterized in that: A guide structure is provided between the outer shell (2) and the chassis (1) to constrain the slider (8) to move only in a straight line along the opening and closing directions.

6. A sliding door recessed limiter according to claim 1, characterized in that: The chassis (1), outer shell (2) and contact mounting port (9) are assembled for easy disassembly.

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