Flow-limiting valve for cylinder body oil cup seat and brake device

Abstract

The utility model provides a flow-limiting valve for a cylinder body oil cup seat, which comprises a first oil inlet valve seat, a second oil inlet valve seat and a first sealing leather ring, and a first oil passing channel is arranged on the inner side of the first oil inlet valve seat; the second oil inlet valve seat is arranged on the first oil inlet valve seat in a sleeving manner, a second oil passing channel communicated with the first oil passing channel is formed in the second oil inlet valve seat, and a third oil passing channel is further formed in the second oil inlet valve seat; the first sealing leather ring is arranged between the first oil inlet valve seat and the second oil inlet valve seat, and a first receding groove is formed in the position, corresponding to the third oil passing channel, of the first sealing leather ring. A horn mouth communicated with the second oil passing channel is formed in the end face, away from the second oil inlet valve seat, of the second oil inlet valve seat. According to the flow-limiting valve structure, the impact of oil on the oil cup cover is reduced, meanwhile, the horn mouth is further arranged, the oil flowing into the oil cup can be dispersed, and the risk of oil leakage of the oil cup cover is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of brake braking systems, in particular to a flow limiting valve for cylinder oil cup seat and brake device. BACKGROUND

[0002] The existing general structure total pump, please refer to Figure 12 , there may be the following problems:

[0003] First, there is a problem in the product with large cylinder diameter at present, when the driver steps on the brake, the brake total pump brakes, the oil in the oil supplement cavity will return to the oil cup through the oil supplement return, but since the action is short-term and instantaneous, the oil will surge instantly, impact the oil cup cover, thereby causing the oil cup cover to loosen and leak oil;

[0004] Second, if the total pump brakes continuously in a short period, the brake force will be smaller and smaller, because when the product brakes for the first time, the oil returns to the pressure cavity along the gap of the leather ring, and when the product has not returned to the position completely, the oil is affected by the gap between the piston and the cylinder, and the oil is not supplemented by the space, so that the brake force of the second braking is smaller than that of the first braking in a short period, and the brake force becomes smaller and smaller with the increase of the number of braking in a short period.

[0005] Therefore, the present application provides a flow limiting valve for cylinder oil cup seat and brake device. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at solving one of the technical problems in the prior art. To this end, the utility model provides a flow limiting valve for cylinder oil cup seat, which is provided with a first oil inlet valve seat, a second oil inlet valve seat and a first sealing leather ring, so that the oil returning to the oil cup per unit time is reduced due to the effect of the flow limiting valve when the product brakes, thereby reducing the impact of the oil on the oil cup cover and avoiding the risk of oil leakage of the oil cup cover.

[0007] The utility model further provides a brake device.

[0008] The flow limiting valve for cylinder oil cup seat comprises:

[0009] The first oil inlet valve seat is provided with a first oil passage on the inner side;

[0010] A second oil inlet valve seat is sleeved on the first oil inlet valve seat, a second oil passage communicating with the first oil passage is arranged on the second oil inlet valve seat, and a third oil passage is further arranged on the second oil inlet valve seat;

[0011] A first sealing ring is arranged between the first oil inlet valve seat and the second oil inlet valve seat, and a first avoiding groove is arranged on the first sealing ring corresponding to the third oil passage;

[0012] The third oil passage is arranged at least two, and is arranged away from the central axis of the second oil inlet valve seat, and a horn communicating with the second oil passage is arranged on the end surface of the second oil inlet valve seat away from the second oil inlet valve seat.

[0013] The flow limiting valve of the utility model through setting first oil inlet valve seat, second oil inlet valve seat and first sealing ring, when product brake, because of flow limiting valve function, make the oil liquid in unit time flow back to oil cup reduce, and further reduce the impact of oil liquid to oil cup cover, avoid the risk of oil cup cover leakage, furthermore, set third oil hole on second oil inlet valve seat, set first avoiding groove on first sealing ring, make the oil liquid more easily flow back to pressure chamber, can prevent the problem of continuous brake oil liquid quantity reduction.

[0014] In some embodiments of the utility model, the first sealing ring comprises a vertical sealing part sleeved on the outer side of the first oil inlet valve seat, a horizontal sealing part arranged at one end of the vertical sealing part, and an inclined sealing part arranged at the outer edge of the horizontal sealing part; the inclined sealing part is trumpet-shaped, and the opening faces the first oil inlet valve seat.

[0015] In some embodiments of the utility model, the flow limiting valve further comprises a top rod and a spring, the top rod is arranged in the first oil inlet valve seat, and the spring is arranged between the top rod and the second oil inlet valve seat, and the top rod abuts against the first oil inlet valve seat through the spring.

[0016] In some embodiments of the utility model, the top rod has an abutting part abutting the bottom of the mounting cavity and completely covering the opening of the first oil passage, and a stepped part arranged above the abutting part and used for spring sleeving, one end of the spring is sleeved on the stepped part and contacts the abutting part, and the other end contacts the second oil inlet valve seat.

[0017] In some embodiments of the utility model, a first groove is arranged at the bottom of the abutting part, and the first groove passes through the central axis of the top rod.

[0018] According to the utility model provides a kind of brake device, including flow limiting valve, wherein flow limiting valve adopts a kind of structure of flow limiting valve for cylinder oil cup seat.

[0019] In some embodiments of the utility model, the brake device includes brake cylinder body, brake cavity is arranged in brake cylinder body, and installation groove is arranged outside, brake cavity includes first cavity portion and second cavity portion from opening inwards in proper order, the inside diameter of first cavity portion is bigger than the inside diameter of second cavity portion, oil inlet hole is still arranged on brake cylinder body for connecting installation groove with first cavity portion, flow limiting valve is arranged in installation groove.

[0020] In some embodiments of the utility model, the first cavity portion has a transition inclined surface between the transition first cavity portion and the second cavity portion.

[0021] In some embodiments of the utility model, the brake device further includes a piston assembly, the piston assembly includes a first piston, a first elastic mechanism arranged on one end of the first piston, a second piston arranged on the other end of the first elastic mechanism, a second elastic mechanism arranged on one end of the second piston, a first main ring cover arranged on the outer wall of the first piston, a first auxiliary ring cover arranged on one end of the first piston and limited by the first elastic mechanism, a second main ring cover arranged on the outer wall of the second piston, and a second auxiliary ring cover arranged on the second piston and limited by the second elastic mechanism, wherein the other end of the second elastic mechanism abuts against the bottom of the brake cavity, and the second auxiliary ring cover and the second auxiliary ring cover are both provided with a second avoiding groove.

[0022] In some embodiments of the utility model, the flow limiting valve is limited at the bottom of the installation groove by a C-shaped snap ring. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitation on the utility model.

[0024] Among them:

[0025] Figure 1 It is the sectional view of the flow limiting valve in the embodiment 1 of the utility model;

[0026] Figure 2 It is the sectional view of the flow limiting valve in the embodiment 2 of the utility model; Figure 2 The partial enlarged view of the utility model;

[0027] Figure 3 It is the structure schematic view of the first sealing ring of the utility model;

[0028] Figure 4 It is the sectional view of the flow limiting valve in the embodiment 2 of the utility model;

[0029] Figure 5 It is the structure schematic view of the utility model;

[0030] Figure 6 This is a schematic diagram of the braking device of this utility model;

[0031] Figure 7 This is a utility model Figure 6 A magnified view of a portion of the image;

[0032] Figure 8 This is a schematic diagram of the piston assembly of this utility model;

[0033] Figure 9 This is a utility model Figure 8 A magnified view of a portion of the image;

[0034] Figure 10 This is a schematic diagram of the oil flow during braking using the braking device of this utility model;

[0035] Figure 11 This is a schematic diagram of the oil flow after braking by the braking device of this utility model;

[0036] Figure 12 This is a schematic diagram of a conventional main pump in existing technology.

[0037] Label Explanation:

[0038] 10. First oil inlet valve seat; 11. First oil passage; 20. Second oil inlet valve seat; 21. Second oil passage; 22. Third oil passage; 23. Flared mouth; 30. First sealing ring; 31. Vertical sealing part; 32. Horizontal sealing part; 321. First clearance groove; 33. Inclined sealing part; 40. Push rod; 41. Abutment part; 411. First groove; 42. Stepped part; 50. Spring; 60. Brake cylinder body; 61. Brake cavity; 611. First cavity part; 6111. Transition inclined surface; 612. Second cavity section; 62. Mounting groove; 63. Oil inlet; 70. Piston assembly; 71. First piston; 72. First elastic mechanism; 721. First pressure plate; 722. First fixing rod; 723. First fixing seat; 724. First spring; 73. Second piston; 74. Second elastic mechanism; 741. Second pressure plate; 742. Second spring; 75. First main rubber ring; 76. First auxiliary rubber ring; 761. Second clearance groove; 77. Second main rubber ring; 78. Second auxiliary rubber ring; 80. Snap ring. Detailed Implementation

[0039] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Example

[0040] Please see Figures 1 to 3This is a flow-limiting valve for a cylinder oil cup seat, as an embodiment 1 of the present invention. It includes: a first oil inlet valve seat 10, a second oil inlet valve seat 20, and a first sealing ring 30. A first oil passage 11 is provided on the inner side of the first oil inlet valve seat. The second oil inlet valve seat 20 is sleeved on the first oil inlet valve seat 10. A second oil passage 21 communicating with the first oil passage 11 is provided on the second oil inlet valve seat 20, and a third oil passage 22 is also provided. The first sealing ring 30 is provided between the first oil inlet valve seat 10 and the second oil inlet valve seat 20. A first clearance groove 321 is provided on the first sealing ring 30 corresponding to the third oil passage 22. At least two third oil passages 22 are provided and are located away from the central axis of the second oil inlet valve seat 20. A flared opening 23 communicating with the second oil passage 21 is provided on the end face of the second oil inlet valve seat 20 away from the second oil inlet valve seat 20. The flow-limiting valve of this utility model, by setting a first oil inlet valve seat 10, a second oil inlet valve seat 20 and a first sealing ring 30, reduces the amount of oil flowing back to the oil cup per unit time when the product is braked, thereby reducing the impact of the oil on the oil cup cover. At the same time, a flared mouth 23 is also provided to disperse the oil flowing into the oil cup, avoiding the risk of oil leakage from the oil cup cover. Furthermore, a third oil passage hole is provided on the second oil inlet valve seat 20 and a first clearance groove 321 is provided on the first sealing ring, making it easier for the oil to flow back into the pressure chamber, which can appropriately prevent the problem of reduced oil volume during continuous braking.

[0041] Please refer to the details. Figure 3 The first sealing ring 30 includes a vertical sealing portion 31 fitted onto the outside of the first oil inlet valve seat 10, a horizontal sealing portion 32 disposed at one end of the vertical sealing portion 31, and an inclined sealing portion 33 disposed at the outer edge of the horizontal sealing portion 32; the inclined sealing portion 33 is funnel-shaped and its opening faces the first oil inlet valve seat 10. A first clearance groove 321 is disposed at the edge of the horizontal sealing ring and extends toward the inclined sealing portion 33.

[0042] At least two third oil passages 22 are provided, and at least two corresponding first clearance grooves 321 are provided. When there are three or more third oil passages 22 and first clearance grooves 321, they are arranged in a circular array. Preferably, one ring of third oil passages 22 is provided, arranged in a cylindrical array, and one ring of first clearance grooves 321 is provided to ensure the efficiency of oil flowing from the oil cup into the brake cylinder 50 and spring 60. Example

[0043] Please see Figures 4 to 5This is a flow-limiting valve for a cylinder oil cup seat, as an embodiment 2 of the present invention. The difference between this embodiment and embodiment 1 is that the flow-limiting valve also has a push rod 40 and a spring. Specifically, the flow-limiting valve further includes a push rod 40 and a spring. The push rod 40 is disposed inside the first oil inlet valve seat 10, and the spring is disposed between the push rod 40 and the second oil inlet valve seat 20. Through the spring, the push rod 40 abuts against the first oil inlet valve seat 10. The push rod 40 has an abutting part 41 that abuts against the bottom of the mounting cavity and completely covers the opening of the first oil passage 11, and a stepped part 42 disposed above the abutting part 41 for the spring to be sleeved. One end of the spring is sleeved on the stepped part 42 and contacts the abutting part 41, and the other end contacts the second oil inlet valve seat 20.

[0044] Please refer to the details. Figure 5 The first oil inlet valve seat 10 is provided with a mounting cavity for mounting the push rod 40 and the spring. The mounting cavity is connected to the first oil passage 11 and the second oil passage 21. The bottom of the abutment part 41 is provided with a first groove 411. The first groove 411 passes through the central axis of the push rod 40. The first groove 411 can prevent the bottom of the abutment part 41 from being too tightly fitted with the bottom of the mounting cavity, so that the push rod 40 can be pushed open relatively easily. Example

[0045] Please see Figures 1 to 11 This is a braking device according to Embodiment 3 of the present invention, including a flow limiting valve, wherein the flow limiting valve adopts the structure of a flow limiting valve for a cylinder oil cup seat in Embodiment 1. The braking device includes a brake cylinder 50, a spring; 60, a brake cavity 61 is provided inside the brake cylinder 50, the spring; 60, and a mounting groove 62 is provided on the outside. The brake cavity 61 includes a first cavity portion 611 (oil replenishment cavity) and a second cavity portion 612 (pressure cavity) in sequence from the opening inward. The inner diameter of the first cavity portion 611 is larger than the inner diameter of the second cavity portion 612. The brake cylinder 50, the spring; 60 is also provided with an oil inlet hole 63 for connecting the mounting groove 62 and the first cavity portion 611. The flow limiting valve is provided in the mounting groove 62. In this embodiment, the first cavity portion 611 and the second cavity portion 612 of the brake chamber 61 are designed with different diameters. The difference in cross-sectional area between the first cavity portion 611 and the second cavity portion 612 is used to overcome the fatigue problem caused by continuous braking. When the return oil hole is sealed, the excess fluid generated per unit distance will be replenished to the second cavity portion 612 through the gap between the rubber rings, thereby achieving the expected purpose of not reducing the amount of brake fluid after multiple braking. At the same time, a third flow channel is provided on the second oil inlet valve core, which, together with the first clearance position, can improve the efficiency of the oil in the oil cup flowing back to the pressure chamber or the replenishment chamber, further improving the braking effect during continuous braking.

[0046] If there is a push rod 40 and a spring, when braking, the brake fluid in the first chamber is squeezed, generating pressure to overcome the elastic potential energy of the spring and push open the push rod 40, and the brake fluid flows into the oil pump through the second oil passage 21.

[0047] Please refer to the details. Figure 6 The first cavity 611 has a transition inclined surface 6111 that connects the first cavity 611 and the second cavity 612, so that the connection between the first cavity 611 and the second cavity 612 is smoother. An oil inlet 63 is provided on the transition inclined surface 6111.

[0048] Please refer to the details. Figure 6 , 7 The vertical sealing part 31 is located between the first inlet valve seat 10 and the second inlet valve seat 20, and the horizontal sealing part 32 is located between the end faces of the first inlet valve seat 10 and the second inlet valve seat 20 to ensure the sealing between the first inlet valve seat 10 and the second inlet valve seat 20. When the flow limiting valve is installed in the mounting groove 62, the inclined sealing part 33 abuts against the inner side wall of the mounting groove 62. By setting the first sealing ring 30, it can be ensured that when the brake fluid returns to the oil pump, the brake fluid only flows in through the first oil passage 11 and the second oil passage 21. After braking, the brake fluid in the oil pump flows into the first brake chamber 61 or the second brake chamber 61 through the third oil passage 22 or the second flow passage and the first flow passage. Specifically, during braking, the brake fluid is squeezed, generating pressure inside the horizontal sealing part 32 and the inclined sealing part 33. The outer edge of the inclined sealing part 33 is tightly fitted with the inner wall of the mounting groove 62, ensuring the sealing between the first sealing ring 30 and the mounting groove 62. After braking, the brake fluid in the pump needs to flow back into the first cavity part 611, that is, the brake fluid flows through the third passage and generates pressure on the first sealing ring 30. The inclined sealing part 33 contracts inward, creating a gap between the outer edge of the first sealing ring 30 and the mounting groove 62. The first clearance groove 321 makes it easier for the inclined part of the first sealing ring to contract, ensuring the stability of the brake fluid return.

[0049] Please refer to the details. Figure 8 , 9The master pump structure also includes a piston assembly 70, which includes a first piston 71, a first elastic mechanism 72 with one end disposed on the first piston 71, a second piston 73 disposed at the other end of the first elastic mechanism, a second elastic mechanism 74 with one end disposed on the second piston 73, a first main rubber ring 75 sleeved on the outer wall of the first piston 71, a first auxiliary rubber ring 76 disposed at one end of the first piston 71 and limited by the first elastic mechanism 72, a second main rubber ring 77 sleeved on the outer wall of the second piston 73, and a first auxiliary rubber ring 76 disposed on the second piston 73 and limited by the first elastic mechanism 72. The second elastic mechanism 74 limits the second auxiliary ring 78. The other end of the second elastic mechanism 74 abuts against the bottom of the brake cavity 61. Both the first auxiliary ring 76 and the second auxiliary ring 78 are provided with a second relief groove 761. The second relief groove 761 makes it easier for the brake fluid to flow back into the second brake cavity (for a detailed explanation of the principle, refer to the first sealing ring 30). Combined with the differential diameter design of this utility model, it makes it easier for the brake fluid in the first brake cavity to flow into the second brake cavity, so as to better solve the fatigue problem caused by continuous braking in the existing structure. The first elastic mechanism 72 includes a first pressure plate 721 for restricting the first set of rubber rings 76 onto the first piston 71, a first fixing rod 722 with one end screwed to the first piston 71 and for restricting the first pressure plate 721 onto the first piston 71, a first fixing seat 723 disposed on and slidably connected to the first fixing rod 722, and a first spring 724 disposed between the first pressure plate 721 and the first fixing seat and located on the outer wall of the first fixing rod 722. The second fixing rod passes through the first fixing seat 723 and the first pressure plate 721, and is screwed to one end of the first piston 71. After being installed in place, the first pressure plate 721 causes the first set of rubber rings 76 to be restricted to the first piston 71. The rubber ring 76 is easier to install, eliminating the need for it to be fitted onto the outer wall of the first piston 71, which greatly improves the installation efficiency of the first rubber ring 76. The second elastic mechanism 74 includes a second pressure plate 741 for restricting the second rubber ring 78 onto the second piston 73 and fitted onto the outer wall of the second piston 73, and a second spring 742 disposed between the second pressure plate 741 and the bottom of the brake chamber. The second rubber ring 78 is also fitted onto the second pressure plate 741. The second rubber ring 78 can be fixed to the outer wall of the second piston 73, which also improves the installation efficiency of the second rubber ring 78, thereby improving the installation efficiency of the piston assembly 70.

[0050] Please refer to the details. Figure 7 The oil valve device is secured to the bottom of the mounting groove 62 by a C-shaped retaining ring 80. The retaining ring can secure the oil valve device to the bottom of the mounting groove 62 more quickly and stably, improving assembly efficiency.

[0051] In summary, the flow-limiting valve of this utility model, by setting a first oil inlet valve seat, a second oil inlet valve seat, and a first sealing ring, reduces the amount of oil flowing back to the oil cup per unit time when the product is braked, thereby reducing the impact of the oil on the oil cup cover. At the same time, a flared mouth is also provided to disperse the oil flowing into the oil cup, avoiding the risk of oil leakage from the oil cup cover. Furthermore, a third oil passage hole is provided on the second oil inlet valve seat, and a first clearance groove is provided on the first sealing ring, making it easier for the oil to flow back into the pressure chamber, which can appropriately prevent the problem of reduced oil volume during continuous braking.

[0052] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A flow-limiting valve for a cylinder block oil cup seat, characterized in that, include: A first oil inlet valve seat, wherein a first oil passage is provided on the inner side of the first oil inlet valve seat; The second oil inlet valve seat is sleeved on the first oil inlet valve seat. The second oil inlet valve seat is provided with a second oil passage that communicates with the first oil passage, and also has a third oil passage. A first sealing ring is disposed between the first oil inlet valve seat and the second oil inlet valve seat, and a first clearance groove is provided on the first sealing ring corresponding to the third oil passage. At least two third oil passages are provided, and they are located away from the central axis of the second oil inlet valve seat. A flared opening that communicates with the second oil passage is provided on the end face of the second oil inlet valve seat away from the second oil inlet valve seat.

2. A flow restriction valve for a cylinder oil cup holder according to claim 1, characterized in that The first sealing ring includes a vertical sealing portion fitted on the outside of the first oil inlet valve seat, a horizontal sealing portion disposed at one end of the vertical sealing portion, and an inclined sealing portion disposed at the outer edge of the horizontal sealing portion; the inclined sealing portion is funnel-shaped and the opening faces the first oil inlet valve seat. The first clearance groove is disposed at the edge of the horizontal sealing ring and extends toward the inclined sealing part; At least two third oil passages are provided, and at least two corresponding first clearance slots are provided. When there are three or more third oil passages and three or more first clearance slots, they are arranged in a circular array.

3. A flow restrictor valve for a cylinder oil cup holder according to claim 1, wherein The flow limiting valve also includes a push rod and a spring. The push rod is disposed inside the first oil inlet valve seat, and the spring is disposed between the push rod and the second oil inlet valve seat. The push rod abuts against the first oil inlet valve seat through the spring.

4. A flow restrictor valve for a cylinder oil cup holder according to claim 3, wherein The push rod has an abutting part that abuts against the bottom of the mounting cavity and completely covers the opening of the first oil passage, and a stepped part that is disposed above the abutting part and used for spring sleeve. One end of the spring is sleeved on the stepped part and contacts the abutting part, and the other end contacts the second oil inlet valve seat.

5. A flow restrictor valve for a cylinder oil cup holder according to claim 4, wherein The bottom of the abutment portion is provided with a first groove, which passes through the central axis of the top rod.

6. A brake device characterized by comprising: The flow limiting valve for cylinder oil cup seat as described in any one of claims 1-2 is adopted.

7. A brake device according to claim 6, characterised in that The braking device includes a brake cylinder body, a brake cavity is provided inside the brake cylinder body, and a mounting groove is provided on the outer side. The brake cavity includes a first cavity part and a second cavity part in sequence from the opening inward. The inner diameter of the first cavity part is larger than the inner diameter of the second cavity part. The brake cylinder body is also provided with an oil inlet hole for connecting the mounting groove and the first cavity part. The flow limiting valve is provided in the mounting groove.

8. A brake device according to claim 7, characterised in that The first cavity portion has a transition inclined surface that connects the first cavity portion and the second cavity portion.

9. A brake device according to claim 7, wherein The braking device also includes a piston assembly, which includes a first piston, a first elastic mechanism with one end disposed on the first piston, a second piston disposed at the other end of the first elastic mechanism, a second elastic mechanism with one end disposed on the second piston, a first main rubber ring sleeved on the outer wall of the first piston, a first auxiliary rubber ring disposed at one end of the first piston and limited by the first elastic mechanism, a second main rubber ring sleeved on the outer wall of the second piston, and a second auxiliary rubber ring disposed on the second piston and limited by the second elastic mechanism. The other end of the second elastic mechanism abuts against the bottom of the braking cavity. Both the first auxiliary rubber ring and the second auxiliary rubber ring are provided with a second clearance groove.

10. A brake device according to claim 7, wherein The flow restriction valve is restricted by a C-shaped snap ring at the bottom of the installation groove.

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