A door stopper and a vehicle

Abstract

The application provides a vehicle door stopper and a vehicle, which comprises a cylinder body, first and second fixed seats are respectively arranged at two ends of the cylinder body, a cylinder rod is fixedly connected with a valve body assembly through the first fixed seat, the valve body assembly is slidably arranged in the cylinder body, the valve body assembly comprises second, compensation and third valve seats which are sequentially connected from left to right, a first stepped pressure limiting valve is elastically connected in the second valve seat, a second stepped pressure limiting valve is elastically connected in the third valve seat, the first and second stepped pressure limiting valves are the same in structure, a communication hole is arranged in the center of each of the first and second stepped pressure limiting valves, and a first pressure inclined surface and a second pressure inclined surface are arranged on the outer surfaces of the front ends of the first and second stepped pressure limiting valves. The application reduces the damping force or the limiting force in the stopper, and improves the use experience of users.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more specifically, to a door limiter and an automobile. Background Technology

[0002] Currently available hydraulic continuously variable door limiters can stop the door at any position within its opening range. When the door is stationary, the limiter restricts the door's movement, and the resistance generated internally is the limiting force. After the door moves, the limiter dampens the door's movement, and the resistance generated internally is the damping force. To ensure occupant safety, the limiting force is relatively large. Due to its internal structure, the damping force equals the limiting force. Therefore, the door is continuously subjected to a large damping force after opening and closing, resulting in poor door opening and closing comfort. Summary of the Invention

[0003] The purpose of this application is to provide a door limiter and a car, which, through a first-stage pressure-limiting valve and a second-stage pressure-limiting valve, reduces the damping force inside the limiter by providing different levels of pressure-bearing area during the operation of the limiter; the specific solution is as follows:

[0004] A door limiter includes a cylinder body, with a first fixed seat and a second fixed seat fixedly disposed at both ends of the cylinder body; one end of a cylinder rod passes through the first fixed seat and is fixedly connected to a valve body assembly; the valve body assembly is slidably disposed inside the cylinder body; the valve body assembly includes a second valve seat, a compensation component, and a third valve seat connected sequentially from left to right; a first graded pressure limiting valve is elastically connected inside the second valve seat; a second graded pressure limiting valve is elastically connected inside the third valve seat; the first graded pressure limiting valve and the second graded pressure limiting valve have the same structure, both having a connecting hole at their center, and both having a first pressure ramp and a second pressure ramp on their front outer surfaces.

[0005] Optionally, the second valve seat and the third valve seat have the same structure, with a plurality of first oil holes circumferentially arranged in the middle of the side wall and a plurality of second oil holes circumferentially arranged at the right end of the side wall; wherein, the first oil holes are opened and closed by a first stage pressure limiting valve or a second stage pressure limiting valve; the front end of the first stage pressure limiting valve and the second stage pressure limiting valve are also provided with an annular member, which fits against the inner surface of the second valve seat or the third valve seat, and a first sealing member is provided at the fitting point.

[0006] Optionally, the valve body assembly further includes a first valve seat; the first valve seat is disposed on the left side of the valve body assembly; the first valve seat is fixedly connected to the cylinder rod, forming a first chamber between them; a plurality of oil drain holes are provided circumferentially on the side wall of the first chamber; a second chamber is formed between the first valve seat, the second valve seat and the first stage pressure limiting valve, wherein the first stage pressure limiting valve is disposed on the right side of the second chamber; a first channel is provided between the second chamber and the first chamber, and a first check valve is provided on the first channel.

[0007] Optionally, the valve body assembly further includes a fourth valve seat; the fourth valve seat is disposed on the right side of the valve body assembly; a third chamber is formed between the third valve seat, the fourth valve seat, and the second stage pressure limiting valve; wherein the second stage pressure limiting valve is disposed at the left opening of the third chamber; a second channel communicating with the third chamber is disposed on the right side of the fourth valve seat, and a second one-way valve 6 is disposed at the right outlet of the second channel, and the second one-way valve is snapped and fixed on the fourth valve seat.

[0008] Optionally, the outer surface of the middle portion of the second valve seat and the third valve seat are provided with a second sealing element and a third sealing element, and the outer surface of the second fixed seat is provided with a fourth sealing element.

[0009] Optionally, the compensation component includes a compensation housing, a first compensation seat and a second compensation seat disposed on both sides inside the compensation housing, and a compensation spring disposed between the first compensation seat and the second compensation seat; the left and right sides of the compensation housing are respectively engaged and fixed with the second valve seat and the third valve seat; the first compensation seat is engaged and disposed inside the compensation housing through the second valve seat; the second compensation seat is slidably disposed inside the compensation housing, and its right end can contact and limit the third valve seat.

[0010] Optionally, a stop component is provided at the right end of the cylinder rod, the stop component including an annular retaining block, a retaining spring and a stop spring; the annular retaining block is sleeved on the cylinder rod and connected to the cylinder rod by the retaining spring; a stop spring is provided between the annular retaining block and the first valve seat.

[0011] Optionally, a transition surface is provided between the first pressure ramp and the second pressure ramp; the first pressure ramp, the second pressure ramp, and the transition surface together seal the pressure relief chamber opening of the second valve seat or the third valve seat; when the cylinder rod moves to the left, and the surface pressure of the first pressure ramp of the first stage pressure relief valve reaches the first stage pressure, the first stage pressure relief valve moves to the left, and the pressure relief chamber of the second valve seat communicates with the first oil hole; when the surface pressure of the second pressure ramp of the first stage pressure relief valve reaches the second stage pressure, the first stage pressure relief valve continues to move to the left, and the pressure relief chamber communicates the first oil hole with the second oil hole.

[0012] Optionally, the other end of the cylinder rod is provided with a first connector; a fixing rod is provided on the second fixing seat, and a second connector is provided on the free end of the fixing rod; both the first connector and the second connector are ball joints, and the ball joints are threaded to the cylinder rod or the fixing rod.

[0013] An automobile includes a door, a body, and a door limiter, wherein the door and the body are connected by the door limiter.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention, through the overall structural design of the valve body assembly, reduces the damping force inside the limiter when it is working. Furthermore, through the cooperative design of the first and second stage pressure limiting valves with the second and third valve seats, and the first and second pressure ramps set on the outer surfaces of the front ends of the first and second stage pressure limiting valves, the limiting force of the limiter is reduced, thus improving the user experience. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the door limiter;

[0017] Figure 2 for Figure 1 AA cross-section view;

[0018] Figure 3 for Figure 2 Enlarged image.

[0019] In the picture:

[0020] 1. Cylinder block;

[0021] 1a. Cylinder rod;

[0022] 2. First fixed seat;

[0023] 3. Second fixing seat;

[0024] 4. Valve body assembly;

[0025] 40. First valve seat;

[0026] 41. Second valve seat;

[0027] 42. Compensation components;

[0028] 420. Compensation shell;

[0029] 421. First compensation seat;

[0030] 422. Second compensation seat;

[0031] 423. Compensating spring;

[0032] 43. Third valve seat;

[0033] 44. Fourth valve seat;

[0034] 45. First-stage pressure relief valve;

[0035] 46. ​​First compression spring;

[0036] 47. Second-stage pressure relief valve;

[0037] 48. Second compression spring;

[0038] 49. Connecting hole;

[0039] 400. First pressure inclined plane;

[0040] 401. Second pressure inclined plane;

[0041] 402. Pressure relief chamber;

[0042] 403, First oil hole;

[0043] 404, Second oil hole;

[0044] 405. Ring-shaped component;

[0045] 406. Oil drain hole;

[0046] 5. First check valve;

[0047] 6. Second check valve;

[0048] 7. Second sealing element;

[0049] 8. Third sealing element;

[0050] 9. Fourth sealing element;

[0051] 10. Stop components;

[0052] 101. Circular locking block;

[0053] 102. Snap ring;

[0054] 103. Stop spring;

[0055] 11. First connecting component;

[0056] 12. Fixing rod;

[0057] 13. Second connector. Detailed Implementation

[0058] To make the purpose, technical solution, and advantages of this application clearer, the following will be described in conjunction with the appendix. Figure 1-3This application will be described in further detail. It is obvious that the described embodiments are merely some, not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments described herein without inventive effort are within the scope of protection of this application.

[0059] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0060] Example 1

[0061] A door limiter includes a cylinder body 1, with a first fixed seat 2 and a second fixed seat 3 fixedly disposed at both ends of the cylinder body 1; a cylinder rod 1a is fixedly connected to a first connecting member 11 at one end, and the other end passes through the first fixed seat 2 and is fixedly connected to a valve body assembly 4; two lip-shaped sealing rings are disposed on the inner surface of the first fixed seat 2 that fits against the cylinder rod 1a; the valve body assembly 4 is slidably disposed inside the cylinder body 1; the valve body assembly 4 includes a first valve seat 40, a second valve seat 41, a compensation member 42, a third valve seat 43, and a fourth valve seat 44 connected sequentially from left to right; a first graded pressure limiting valve 45 is disposed inside the second valve seat 41; a first compression spring 46 is disposed between the first graded pressure limiting valve 45 and the first valve seat 40; a second graded pressure limiting valve 47 is disposed inside the third valve seat 43; a second compression spring 48 is disposed between the second graded pressure limiting valve 47 and the second valve seat 41; the first graded pressure limiting valve 45 and the second graded pressure limiting valve 46 are connected in a sliding manner inside the cylinder body 1; the first graded pressure limiting valve 40 and the second graded pressure limiting valve 41 ... The pressure valves 47 have the same structure but are arranged in opposite directions. Both have a connecting hole 49 at their center, and both have a first pressure ramp 400 and a second pressure ramp 401 on their right outer surfaces. A transition surface is also provided between the first pressure ramp 400 and the second pressure ramp 401. The first pressure ramp 400, the second pressure ramp 401, and the transition surface are together sealed at the opening of the pressure relief chamber 402 of the second valve seat 41 or the third valve seat 43. When the cylinder rod 1a moves to the left, and the surface pressure of the first pressure ramp 400 of the first stage pressure relief valve 45 reaches the first stage pressure, the first stage pressure relief valve 45 moves to the left to compress the first compression spring 46, and the pressure relief chamber 402 of the second valve seat 41 is connected to the first oil hole 403. When the surface pressure of the second pressure ramp 401 of the first stage pressure relief valve 45 reaches the second stage pressure, the first stage pressure relief valve 45 continues to move to the left, and the first oil hole 403 is connected to the second oil hole 404 through the pressure relief chamber.

[0062] Furthermore, the second valve seat 41 and the third valve seat 43 have the same structure and are arranged in opposite directions. Both have a plurality of first oil holes 403 arranged circumferentially in the middle of their sidewalls, and a plurality of second oil holes 404 arranged circumferentially in the sidewall near the compensation component 42. The first oil holes 403 are opened and closed by a first grade pressure limiting valve 45 or a second grade pressure limiting valve 47. The right end of the first grade pressure limiting valve 45 and the second grade pressure limiting valve 47 is also provided with an annular member 405. The annular member 405 is in contact with the inner surface of the second valve seat 41 or the third valve seat 43, and a first sealing member is provided at the contact point. The first sealing member is an O-ring.

[0063] Furthermore, the first valve seat 40 is fixedly connected to the cylinder rod 1a, forming a first chamber between them; a plurality of oil drain holes 406 are circumferentially arranged on the side wall of the first chamber; a second chamber is formed between the first valve seat 40, the second valve seat 41, and the first stage pressure limiting valve 45; wherein the first stage pressure limiting valve 45 is located on the right side of the second chamber; a first channel is provided between the second chamber and the first chamber, and a first check valve 5 is provided on the first channel; a third chamber is provided between the third valve seat 43, the fourth valve seat 44, and the second stage pressure limiting valve 47, wherein the second stage pressure limiting valve 47 is located at the left opening of the third chamber, and a second channel communicating with the third chamber is provided on the right side of the fourth valve seat 44, and a second check valve 6 is provided at the right outlet of the second channel, and the second check valve 6 is snapped and fixed on the fourth valve seat 44.

[0064] Specifically, when the cylinder rod 1a moves the valve body assembly 4 to the left under the action of external force, the first check valve 5 closes, and oil pressure (resistance) is generated in the left oil chamber of the valve body assembly 4. During the movement, when the surface pressure of the first pressure ramp 400 of the first stage pressure limiting valve 45 reaches the first-level pressure, the first stage pressure limiting valve 45 moves to the left inside the second valve seat at the same time and compresses the first compression spring 46. The pressure relief chamber 402 of the second valve seat is connected to the first oil hole 403. When the surface pressure of the second pressure ramp 401 of the second valve seat reaches the second-level pressure, the first stage pressure limiting valve 45 continues to move to the left, and the pressure relief chamber 402 connects the first oil hole 403 to the second oil hole 404. The oil in the cavity passes sequentially through the first oil hole 403, the pressure relief chamber 402, and the second oil hole 404 of the second valve seat 41, the gap between the compensation component 42 and the cylinder 1, the second oil hole 404 and the pressure relief chamber 402 of the third valve seat 43, the center hole of the second stage pressure limiting valve 47, and finally enters the right side chamber of the valve body assembly 4 through the second one-way valve 6. The advantage of this design is that during the leftward movement of the cylinder rod 1a, the first stage pressure limiting valve 45 opens and the second stage pressure limiting valve 47 closes. At the same time, through the first pressure ramp 400 and the second pressure ramp 401 of the first stage pressure limiting valve 45, the overall oil pressure force (resistance) on the first stage pressure limiting valve 45 is reduced, thereby improving the user's door opening experience.

[0065] It should be further explained that when the cylinder rod 1a drives the valve body assembly 4 to move to the left, since the cylinder rod 1a occupies part of the volume in the left oil chamber, the right compensation seat of the compensation component 42 will move to the right, so that the oil on the right side of the compensation component 42 is replenished into the right chamber.

[0066] Conversely, when cylinder rod 1a moves valve body assembly 4 to the right, the second check valve 6 closes, and oil pressure (resistance) is generated in the right oil chamber of valve body assembly 4. During the movement of valve body assembly 4, when the surface pressure of the first pressure ramp 400 of the second stage pressure limiting valve 47 reaches the first stage pressure, the second stage pressure limiting valve 47 moves to the right simultaneously inside the third valve seat, and the pressure relief chamber 402 of the third valve seat communicates with the first oil hole 403; when the surface pressure of the second pressure ramp 401 of the third valve seat reaches the second stage pressure, the second stage pressure limiting valve... 47. Continuing to move to the right, the first oil hole 403 and the second oil hole 404 are connected through the pressure relief chamber 402; the oil in the right oil chamber passes sequentially through the gaps between the fourth valve seat 44 and the third valve seat 43 and the cylinder body 1, the first oil hole 403 of the third valve seat 43, the pressure relief chamber 402 and the second oil hole 404, the gap between the compensation component 42 and the cylinder body 1, the second oil hole 404 of the second valve seat 41, the center hole of the first stage pressure limiting valve 45, the first one-way valve 5, and finally enters the left oil chamber through the drain hole 406 of the first chamber; this design The advantages are that when the cylinder rod 1a retracts, the first stage pressure relief valve 45 closes and the first one-way valve 5 opens, the second stage pressure relief valve 47 opens and the first one-way valve 5 closes. Through the mutual linkage between the valve bodies, the oil circuits of the right oil chamber and the left oil chamber are connected. At the same time, a further benefit is that, through the first stage pressure relief valve 45 and the second stage pressure relief valve 47 with the same structure, as well as the second valve seat 41 and the third valve seat 43 with the same structure, whether the cylinder rod 1a is extended or retracted, the resistance or limiting force inside the limiter can be reduced through the two pressure ramps on the front outer surfaces of the first stage pressure relief valve 45 and the second stage pressure relief valve 47. Moreover, since two pressure ramps are used, they have different force-bearing areas. During use, the user will feel the different resistance and tactile sensations, which improves the overall user experience. Furthermore, since two pressure ramps with a certain inclination are used, the pressure-bearing area of ​​the first stage pressure relief valve 45 and the second stage pressure relief valve 47 is increased, which reduces the opening pressure of the pressure relief valve, that is, reduces the damping force or limiting force inside the limiter.

[0067] To further improve the sealing effect, a second sealing element 7 and a third sealing element 8 are provided on the outer surface of the middle part of the second valve seat 41 and the third valve seat 43, respectively; a fourth sealing element 9 is provided on the outer surface of the second fixed seat 3; wherein the second sealing element 7 is a lip seal ring, the third sealing element 8 is a rubber seal ring, and the fourth sealing element 9 is an O-ring seal ring.

[0068] Furthermore, the compensation component 42 includes a compensation housing 420, a first compensation seat 421 and a second compensation seat 422 disposed on both sides inside the compensation housing 420, and a compensation spring 423 disposed between the first compensation seat 421 and the second compensation seat 422; the left and right sides of the compensation housing 420 are respectively engaged and fixed to the second valve seat 41 and the third valve seat 43, and the first compensation seat 421 is engaged and fixed to the left side of the compensation housing 420 through the second valve seat 41; the second compensation seat 422 is slidably disposed on the right side of the compensation housing 420, and its right end can contact and limit the movement of the third valve seat 43. This design compensates for the volume difference between the left and right oil chambers of the valve body assembly 4 when it moves by sliding the second compensation seat 422 inside the compensation housing 420.

[0069] Furthermore, a stop component 10 is provided at the right end of the cylinder rod 1a. The stop component 10 includes an annular retaining block 101, a retaining spring 102, and a stop spring 103. The annular retaining block 101 is sleeved on the cylinder rod 1a and connected to the cylinder rod 1a by the retaining spring 102. A stop spring 103 is provided between the annular retaining block 101 and the first valve seat 40. Through the design of the stop component 10, when the cylinder rod 1a is stretched to its maximum length, the resistance of the cylinder rod 1a can be used to raise the limit switch and indicate to the user that it has reached its maximum opening position.

[0070] The second fixed base 3 is provided with a fixed rod 12, and the free end of the fixed rod 12 is provided with a second connector 13; the first connector 11 and the second connector 13 are both ball joints, and the ball joints are both threaded to the cylinder rod 1a or the fixed rod 12.

[0071] The present invention also provides an automobile using the above embodiments, including a door, a body, and the door limiter, wherein the door and the body are connected by the door limiter.

[0072] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

Claims

1. A door limiter, characterized in that, The cylinder (1) includes a cylinder body (1), with a first fixed seat (2) and a second fixed seat (3) fixedly installed at both ends of the cylinder body (1); one end of the cylinder rod (1a) passes through the first fixed seat (2) and is fixedly connected to the valve body assembly (4); the valve body assembly (4) is slidably installed inside the cylinder body (1); the valve body assembly (4) includes a second valve seat (41), a compensation component (42) and a third valve seat (43) connected sequentially from left to right. The second valve seat (41) is internally elastically connected to a first stage pressure limiting valve (45); the third valve seat (43) is internally elastically connected to a second stage pressure limiting valve (47); the first stage pressure limiting valve (45) and the second stage pressure limiting valve (47) have the same structure and are arranged in opposite directions. Both have a connecting hole (49) in the center and a first pressure inclined surface (400) and a second pressure inclined surface (401) on the outer surface of their right ends. The second valve seat (41) and the third valve seat (43) have the same structure but are arranged in opposite directions. Both have a number of first oil holes (403) arranged in the circumferential direction in the middle of their side walls, and a number of second oil holes (404) arranged in the circumferential direction on the right side of their side walls. The first oil holes (403) are opened and closed by a first grade pressure relief valve (45) or a second grade pressure relief valve (47). The front end of the first grade pressure relief valve (45) and the second grade pressure relief valve (47) is also provided with an annular part (405). The annular part (405) is in contact with the inner surface of the second valve seat (41) or the third valve seat (43), and a first sealing element is provided at the contact point. A transition surface is provided between the first pressure ramp (400) and the second pressure ramp (401); the first pressure ramp (400), the second pressure ramp (401) and the transition surface are jointly closed at the opening of the pressure relief chamber (402) of the second valve seat (41) or the third valve seat (43); when the cylinder rod (1a) moves to the left, and the surface pressure of the first pressure ramp (400) of the first stage pressure relief valve (45) reaches the first stage pressure, the first stage pressure relief valve (45) compresses the first compression spring (46) and moves to the left, and the pressure relief chamber (402) of the second valve seat (41) is connected to the first oil hole (403); when the surface pressure of the second pressure ramp (401) of the first stage pressure relief valve (45) reaches the second stage pressure, the first stage pressure relief valve (45) continues to move to the left, and the first oil hole (403) is connected to the second oil hole (404) through the pressure relief chamber (402).

2. The door limiter according to claim 1, characterized in that, The valve body assembly (4) further includes a first valve seat (40); the first valve seat (40) is disposed on the left side of the valve body assembly (4) and is fixedly connected to the cylinder rod (1a), forming a first chamber between the two; a plurality of oil drain holes (406) are provided circumferentially on the side wall of the first chamber; a second chamber is formed between the first valve seat (40), the second valve seat (41) and the first grade pressure limiting valve (45), wherein the first grade pressure limiting valve (45) is disposed on the right side of the second chamber; a first channel is provided between the second chamber and the first chamber, and a first check valve (5) is provided on the first channel.

3. The door limiter according to claim 2, characterized in that, The valve body assembly (4) further includes a fourth valve seat (44); the fourth valve seat (44) is disposed on the right side of the valve body assembly (4); a third chamber is formed between the third valve seat (43), the fourth valve seat (44) and the second stage pressure limiting valve (47); wherein the second stage pressure limiting valve (47) is disposed at the left opening of the third chamber; a second channel communicating with the third chamber is disposed on the right side of the fourth valve seat (44), and a second one-way valve (6) is disposed at the right outlet of the second channel, and the second one-way valve (6) is snapped and fixed on the fourth valve seat (44).

4. The door limiter according to claim 3, characterized in that, The second valve seat (41) and the third valve seat (43) are provided with a second seal (7) and a third seal (8) on their middle outer surfaces, and the second fixed seat (3) is provided with a fourth seal (9) on its outer surface.

5. The door limiter according to claim 4, characterized in that, The compensation component (42) includes a compensation housing (420), a first compensation seat (421) and a second compensation seat (422) disposed on both sides inside the compensation housing (420), and a compensation spring (423) disposed between the first compensation seat (421) and the second compensation seat (422); the left and right sides of the compensation housing (420) are respectively snapped and fixed to the second valve seat (41) and the third valve seat (43); the first compensation seat (421) is snapped and disposed inside the compensation housing (420) through the second valve seat (41); the second compensation seat (422) is slidably disposed inside the compensation housing (420), and its right end can contact and limit the third valve seat (43).

6. The door limiter according to claim 5, characterized in that, A stop component (10) is provided at the right end of the cylinder rod (1a). The stop component (10) includes an annular locking block (101), a retaining spring (102), and a stop spring (103). The annular locking block (101) is sleeved on the cylinder rod (1a) and connected to the cylinder rod (1a) by the retaining spring (102). A stop spring (103) is provided between the annular locking block (101) and the first valve seat (40).

7. The door limiter according to claim 1, characterized in that, The other end of the cylinder rod (1a) is provided with a first connector (11); the second fixed seat (3) is provided with a fixed rod (12), and the free end of the fixed rod (12) is provided with a second connector (13); the first connector (11) and the second connector (13) are both ball joints, and the ball joints are both threaded to the cylinder rod (1a) or the fixed rod (12).

8. An automobile, comprising a door, a body, and a door limiter as described in any one of claims 1-7, wherein the door and the body are connected by the door limiter.

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