Hydraulic control mechanism, clutch system and vehicle

Abstract

The utility model discloses a hydraulic control mechanism, clutch system and vehicle relates to vehicle technical field, the hydraulic control mechanism includes hydraulic oil cylinder, bleed screw and sealing element, hydraulic oil cylinder has the accommodation cavity that is used for accommodating hydraulic oil, the outer surface of hydraulic oil cylinder is equipped with the mounting hole that is communicated with the accommodation cavity, and the sealing element is equipped with the bleed screw. The deflation screw is arranged in the mounting hole, the deflation screw is matched with the hole wall of the mounting hole through threads, the deflation screw is provided with an exhaust channel used for being communicated with the containing cavity, the sealing piece is elastic and arranged on the peripheral face of the deflation screw so as to surround the deflation screw, and the hydraulic control mechanism has an exhaust state. The containing cavity is communicated with the outside through the exhaust channel, and the sealing piece abuts against the outer surface of the hydraulic oil cylinder so as to seal a thread gap between the deflation screw and the installation hole. According to the technical scheme, in the exhaust process of the hydraulic control mechanism, hydraulic oil is prevented from seeping out of the thread gap between the deflation screw and the mounting hole.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a hydraulic operating mechanism, a clutch and a vehicle. Background Art

[0002] In a vehicle, a hydraulic operating mechanism can be used to drive a clutch or a brake. The hydraulic operating mechanism includes a hydraulic cylinder having a receiving chamber for receiving hydraulic oil. When the hydraulic oil in the receiving chamber is replaced, gas will follow the hydraulic oil into the receiving chamber. In order to discharge the gas outside the receiving chamber, a mounting hole connected to the receiving chamber is provided on the outer surface of the hydraulic cylinder. The hydraulic operating mechanism also includes a bleed screw provided in the mounting hole. It can be understood that the bleed screw is threadedly matched with the hole wall of the mounting hole. The bleed screw has an exhaust passage for communicating with the receiving chamber. The user can open the bleed screw, and sleeve one end of the hose on the bleed screw, and connect the other end to the collection container. In this way, the gas and hydraulic oil can pass through the exhaust passage and the hose from the receiving chamber in sequence to reach the collection container. The collection container is used to collect the hydraulic oil discharged from the exhaust passage. However, during the exhaust process, the hydraulic oil will seep out from the thread gap between the bleed screw and the mounting hole. The leaked hydraulic oil is difficult to collect, so that the leaked hydraulic oil pollutes the environment. Utility Model Content

[0003] The main purpose of the utility model is to provide a hydraulic operating mechanism, a clutch system and a vehicle, aiming to prevent hydraulic oil from leaking out from the thread gap between the bleed screw and the mounting hole during the exhaust process of the hydraulic operating mechanism.

[0004] To achieve the above-mentioned purpose, the hydraulic operating mechanism proposed by the utility model comprises:

[0005] A hydraulic cylinder having a receiving chamber for receiving hydraulic oil, wherein an outer surface of the hydraulic cylinder is provided with a mounting hole communicating with the receiving chamber;

[0006] a bleed screw, disposed in the mounting hole, the bleed screw being threadably matched with a hole wall of the mounting hole, and having an exhaust passage for communicating with the receiving cavity; and

[0007] A sealing member having elasticity, wherein the sealing member is arranged on the outer peripheral surface of the bleed screw to surround the bleed screw;

[0008] The hydraulic operating mechanism has an exhaust state, in which the accommodating chamber is connected to the outside through the exhaust passage, and the sealing member presses against the outer surface of the hydraulic cylinder to seal the thread gap between the bleed screw and the mounting hole.

[0009] In one embodiment, the sealing member includes an elastic body surrounding the bleed screw and an elastic oil-resistant layer provided on the elastic body. In the length direction of the bleed screw, the elastic oil-resistant layer includes a first oil-resistant portion provided on the elastic body on a side close to the outer surface of the hydraulic cylinder. In the exhaust state, the first oil-resistant portion presses against the outer surface of the hydraulic cylinder. The first oil-resistant portion seals the thread gap between the bleed screw and the mounting hole.

[0010] In one embodiment, the elastic oil-resistant layer further includes a second oil-resistant portion provided on the inner circumference of the elastic body, the first oil-resistant portion is connected to the second oil-resistant portion, and the elastic body is connected to the outer circumference of the bleed screw via the second oil-resistant portion.

[0011] In one embodiment, the outer peripheral surface of the elastic body is exposed to the outside.

[0012] In one embodiment, the elastic modulus of the elastic oil-resistant layer is greater than the elastic modulus of the elastic body;

[0013] And / or, the thickness of the elastic body is greater than the thickness of the elastic oil-resistant layer.

[0014] In one embodiment, the elastic body is made of natural rubber, and / or the elastic oil-resistant layer is made of fluororubber.

[0015] In one embodiment, in the exhaust state, the compression amount of the seal in the length direction of the deflation screw is greater than or equal to 2 mm.

[0016] In one embodiment, a limiting ring is provided on the outer circumference of the bleed screw. In the length direction of the bleed screw, the limiting ring is provided on the side of the seal away from the outer surface of the hydraulic cylinder. The limiting ring is used to squeeze the seal together with the hydraulic cylinder.

[0017] The utility model also provides a clutch system, which comprises:

[0018] Clutch; and

[0019] The aforementioned hydraulic operating mechanism is drivingly connected to the clutch.

[0020] The utility model also provides a vehicle, which comprises the above-mentioned clutch system.

[0021] In the technical solution of the utility model, in the exhaust state, the receiving chamber is connected to the outside through the exhaust channel, and the sealing member presses against the outer surface of the hydraulic cylinder to seal the thread gap between the bleed screw and the mounting hole. In this way, the hydraulic operating mechanism can prevent hydraulic oil from leaking from the thread gap between the bleed screw and the mounting hole during the exhaust process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of an embodiment of the hydraulic operating mechanism provided by the utility model applied to a clutch system;

[0024] Figure 2 for Figure 1 A sectional view of a part of the structure of the hydraulic operating mechanism;

[0025] Figure 3 for Figure 2 A magnified view of the structure in the middle;

[0026] Figure 4 for Figure 2 Schematic diagram of the structure of the air bleed bolt, limit ring, and seal.

[0027] Description of Figure Numbers:

[0028] 100. Hydraulic operating mechanism; 110. Clutch pedal; 120. Master cylinder; 130. Oil pot; 140. Oil pipe; 150. Slave cylinder; 160. Shift fork; 200. Hydraulic cylinder; 210. Accommodating chamber; 300. Bleed bolt; 310. Exhaust channel; 400. Sealing element; 410 Elastic body; 420 Elastic oil-resistant layer; 421 First oil-resistant portion; 422 Second oil-resistant portion; 500 Limiting ring.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] The utility model provides a vehicle, which includes a clutch system. Figure 1 As shown, the clutch system includes a clutch and a hydraulic operating mechanism 100 drivingly connected to the clutch. For the clutch system, the hydraulic operating mechanism 100 generally includes a clutch pedal 110, a master cylinder 120 drivingly connected to the clutch pedal 110, an oil pot 130 communicating with the master cylinder 120, an oil pipe 140 communicating with the master cylinder 120, a slave cylinder 150 communicating with the master cylinder 120 through the oil pipe 140, and a shift fork 160 drivingly connected to the slave cylinder 150, wherein the shift fork 160 is used for drivingly connecting to the clutch. The driver can step on the clutch pedal 110 to push the hydraulic oil in the master cylinder 120 to reach the slave cylinder 150 through the oil pipe 140, so that the hydraulic oil pushes the piston in the slave cylinder 150, thereby driving the shift fork 160, and finally realizing the separation of the clutch.

[0034] Of course, it should be understood that the application of the hydraulic operating mechanism 100 is not limited to the clutch system, and the hydraulic operating mechanism 100 can also be applied to the brake system. In some embodiments, the vehicle also includes a brake system, and the brake system includes a brake and the hydraulic operating mechanism 100. It can be understood that for the brake system, the pedal of the hydraulic operating mechanism 100 is a brake pedal, and the hydraulic operating mechanism 100 is connected to the brake through the brake wheel cylinder so that the brake generates braking force.

[0035] Without loss of generality, the clutch system is taken as an example for introduction below.

[0036] like Figure 1 As shown, the hydraulic operating mechanism 100 is provided with a bleed screw in the slave cylinder 150. The user can open the bleed screw to discharge the gas in the slave cylinder 150. It should be understood that the setting position of the bleed screw is exemplary and is not intended to limit the scope of protection of the present disclosure. In some alternative embodiments, the bleed screw can also be provided in the master cylinder 120. Without loss of generality, the following description will be given by taking the bleed screw provided in the slave cylinder 150 as an example. It should be pointed out that the bleed screw can be replaced by the bleed bolt 300.

[0037] Refer to Figures 2 to 4The utility model also proposes a hydraulic operating mechanism 100, which includes a hydraulic cylinder 200, a bleed screw and a seal 400. For the clutch system, the hydraulic operating mechanism 100 can be configured as a slave cylinder 150 or a master cylinder 120. Here, the slave cylinder 150 is taken as an example for introduction. The hydraulic cylinder 200 has a receiving chamber 210 for receiving hydraulic oil, and the outer surface of the hydraulic cylinder 200 is provided with a mounting hole connected to the receiving chamber 210. The bleed screw is arranged in the mounting hole, and the bleed screw is threadedly matched with the hole wall of the mounting hole, and the bleed screw has an exhaust channel 310 connected to the receiving chamber 210. The seal 400 is elastic, and the seal 400 is arranged on the outer peripheral surface of the bleed screw to surround the bleed screw. The hydraulic operating mechanism 100 has an exhaust state. In the exhaust state, the receiving chamber 210 is connected to the outside through the exhaust channel 310, and the sealing member 400 presses against the outer surface of the hydraulic cylinder 200 to seal the thread gap between the bleed screw and the mounting hole. It can be understood that the hydraulic operating mechanism 100 also has a sealing state. In the sealing state, the receiving chamber 210 is not connected to the exhaust channel 310, that is, the hydraulic oil and gas will not be discharged from the exhaust channel 310 to the outside of the receiving chamber 210. In this way, in the sealing state, the user can rotate the bleed screw to partially screw the bleed screw out of the mounting hole, so that the hydraulic operating mechanism 100 enters the exhaust state. In the exhaust state, the user can rotate the bleed screw to partially screw the bleed screw into the mounting hole, so that the hydraulic operating mechanism 100 enters the sealing state. Since the seal 400 presses against the outer surface of the hydraulic cylinder 200 when the hydraulic operating mechanism 100 is in the exhaust state, and the seal 400 seals the thread gap, then when the hydraulic operating mechanism 100 is in the sealing state, the seal 400 also presses against the outer surface of the hydraulic cylinder 200, and the seal 400 seals the thread gap. It can be understood that the compression amount of the seal 400 in the sealing state is greater than the compression amount of the seal 400 in the exhaust state. In the process of changing from the sealing state to the exhaust state, the tightening degree of the bleed screw relative to the hydraulic cylinder 200 changes from tight to loose, and in this process, the hydraulic oil is more likely to seep out from the thread gap. Therefore, the hydraulic operating mechanism 100 of the present application realizes the sealing of the thread gap when changing between the exhaust state, the sealing state, and the exhaust state and the sealing state through the elastic seal 400. Thus, in the sealed state, when the user opens the bleed screw to put the hydraulic operating mechanism 100 into the exhaust state, the hydraulic oil will not leak out from the thread gap to the outer surface of the hydraulic cylinder 200, so as to ensure that the path of the hydraulic oil flowing through the bleed screw is the exhaust channel 310, thereby facilitating the user to collect the hydraulic oil. Thus, on the one hand, the waste of hydraulic oil is avoided, and on the other hand, the leakage of hydraulic oil is avoided, thereby avoiding environmental pollution.

[0038] Since the hydraulic oil seals the thread gap in the exhaust state, the seal 400 can contact the hydraulic oil. In order to reduce the degree of erosion of the seal 400 by the hydraulic oil, in some embodiments, the seal 400 includes an elastic body 410 surrounding the bleed screw, and an elastic oil-resistant layer 420 provided on the elastic body 410. In the length direction of the bleed screw, the elastic oil-resistant layer 420 includes a first oil-resistant portion 421 provided on the elastic body 410 near the outer surface of the hydraulic cylinder 200. In the exhaust state, the first oil-resistant portion 421 presses against the outer surface of the hydraulic cylinder 200, and the first oil-resistant portion 421 seals the thread gap between the bleed screw and the mounting hole. In this way, the seal 400 contacts the hydraulic oil through the first oil-resistant portion 421. It can be understood that the first oil-resistant portion 421 has oil-resistant properties, so that the first oil-resistant portion 421 can reduce the degree of erosion of the seal 400 by the hydraulic oil. In some alternative embodiments, the entire seal 400 can also be configured as an oil-resistant seal 400.

[0039] Since the seal 400 is disposed on the outer circumference of the bleed screw, hydraulic oil may also appear between the seal 400 and the bleed screw. In order to reduce the degree of erosion of the inner circumference of the seal 400 by the hydraulic oil, in some embodiments, the elastic oil-resistant layer 420 further includes a second oil-resistant portion 422 disposed on the inner circumference of the elastic body 410, the first oil-resistant portion 421 is connected to the second oil-resistant portion 422, and the elastic body 410 is connected to the outer circumference of the bleed screw through the second oil-resistant portion 422. In this way, the inner circumference of the seal 400 is the inner circumference of the second oil-resistant portion 422. It can be understood that the second oil-resistant portion 422 has oil-resistant properties, so that the second oil-resistant portion 422 can reduce the degree of erosion of the seal 400 by the hydraulic oil.

[0040] In some embodiments, the material of the elastic body 410 is configured as natural rubber. Natural rubber has good elasticity, so that the seal 400 has good elasticity. In some alternative embodiments, the material of the elastic body 410 is configured as butadiene rubber. In some embodiments, the material of the elastic oil-resistant layer 420 is configured as fluororubber. Fluororubber has the characteristics of high temperature resistance, oil resistance, and chemical corrosion resistance. It can be understood that when the material of the elastic oil-resistant layer 420 is configured as fluororubber, the materials of the first oil-resistant part 421 and the second oil-resistant part 422 above are respectively configured as fluororubber. In some alternative embodiments, the material of the elastic oil-resistant layer 420 is configured as hydrogenated nitrile rubber. In one embodiment, the material of the elastic body 410 is configured as natural rubber, and the material of the elastic oil-resistant layer 420 is configured as fluororubber. In this way, the seal 400 has both good elasticity and good oil resistance.

[0041] In some embodiments, the elastic modulus of the elastic oil-resistant layer 420 is greater than the elastic modulus of the elastic body 410. That is, under the same force, the elastic deformation of the elastic oil-resistant layer 420 is smaller than the elastic deformation of the elastic body 410. For example, the material of the elastic oil-resistant layer 420 is configured as fluororubber, and the material of the elastic body 410 is configured as natural rubber. In some other embodiments, the elastic modulus of the elastic oil-resistant layer 420 is smaller than the elastic module of the elastic body 410.

[0042] In some embodiments, the thickness of the elastic body 410 is greater than the thickness of the elastic oil-resistant layer 420. It should be noted that the length direction of the bleed screw is the thickness direction of the elastic body 410. This makes the elastic body 410 thicker, so that the seal 400 can be elastically deformed.

[0043] In some embodiments, the volume of the elastic body 410 is greater than the volume of the elastic oil-resistant layer 420, and the thickness of the elastic body 410 is greater than the thickness of the elastic oil-resistant layer 420, so that the elastic body 410 has a greater influence on the seal 400 in the length direction of the bleed screw than the elastic oil-resistant layer 420. The material of the elastic body 410 is configured as natural rubber, and the material of the elastic oil-resistant layer 420 is configured as fluororubber. It can be understood that fluororubber has higher oil resistance than natural rubber, but weaker elasticity than natural rubber. This makes the overall elasticity of the seal 400 closer to natural rubber with good elasticity while having oil resistance. In this way, it is easy to achieve equivalent sealing in the process of the hydraulic operating mechanism 100 changing from the sealing state to the exhaust state.

[0044] In some embodiments, the outer peripheral surface of the elastic body 410 is exposed to the outside. The outer peripheral surface of the elastic body 410 is less likely to contact the hydraulic oil, which can reduce the material used for the elastic oil-resistant layer 420 and save costs.

[0045] In some embodiments, in the exhaust state, the compression amount of the seal 400 in the length direction of the deflation screw is greater than or equal to 2 mm. In this way, in the exhaust state, the seal 400 still has an equivalent sealing compression amount of more than 2 mm, leaving the user with more than 2 mm of margin for unscrewing the deflation screw. For example, Figure 2 In the sealed state, the compression amount of the seal 400 is L, and the range of L is 3mm to 3.5mm. In the sealed state, the pitch of the bleed screw is 0.5mm to 1mm.

[0046] In some embodiments, a limiting ring 500 is provided on the outer circumference of the bleed screw. In the length direction of the bleed screw, the limiting ring 500 is provided on the side of the seal 400 away from the outer surface of the hydraulic cylinder 200, and the limiting ring 500 is used to squeeze the seal 400 together with the hydraulic cylinder 200. The limiting ring 500 allows the seal 400 to be compressed more evenly. In some alternative embodiments, the seal 400 is provided on the side of the head of the bleed screw close to the outer surface of the hydraulic cylinder 200, and the head of the bleed screw is used to squeeze the seal 400 together with the hydraulic cylinder 200.

[0047] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hydraulic operating mechanism, characterized in that: include A hydraulic cylinder having a receiving chamber for receiving hydraulic oil, wherein an outer surface of the hydraulic cylinder is provided with a mounting hole communicating with the receiving chamber; A bleed screw is arranged in the mounting hole, the bleed screw is matched with the hole wall of the mounting hole through a thread, and the bleed screw has an exhaust passage for communicating with the receiving cavity; as well as A sealing member having elasticity, wherein the sealing member is arranged on the outer peripheral surface of the bleed screw to surround the bleed screw; The hydraulic operating mechanism has an exhaust state, in which the accommodating chamber is connected to the outside through the exhaust passage, and the sealing member presses against the outer surface of the hydraulic cylinder to seal the thread gap between the bleed screw and the mounting hole.

2. The hydraulic operating mechanism according to claim 1, characterized in that: The sealing component includes an elastic main body surrounding the bleed screw and an elastic oil-resistant layer provided on the elastic main body. In the length direction of the bleed screw, the elastic oil-resistant layer includes a first oil-resistant portion provided on the side of the elastic main body close to the outer surface of the hydraulic cylinder. In the exhaust state, the first oil-resistant portion presses against the outer surface of the hydraulic cylinder. The first oil-resistant portion seals the thread gap between the bleed screw and the mounting hole.

3. The hydraulic operating mechanism according to claim 2, characterized in that: The elastic oil-resistant layer further includes a second oil-resistant portion provided on the inner circumferential surface of the elastic body, the first oil-resistant portion is connected to the second oil-resistant portion, and the elastic body is connected to the outer circumferential surface of the bleed screw via the second oil-resistant portion.

4. The hydraulic operating mechanism according to claim 2, characterized in that: The outer peripheral surface of the elastic body is exposed to the outside.

5. The hydraulic operating mechanism according to claim 2, characterized in that: The elastic modulus of the elastic oil-resistant layer is greater than the elastic modulus of the elastic body; And / or, the thickness of the elastic body is greater than the thickness of the elastic oil-resistant layer.

6. The hydraulic operating mechanism according to claim 2, characterized in that: The elastic body is made of natural rubber, and / or the elastic oil-resistant layer is made of fluororubber.

7. The hydraulic operating mechanism according to any one of claims 1 to 6, characterized in that: In the exhaust state, the compression amount of the seal in the length direction of the bleed screw is greater than or equal to 2 mm.

8. The hydraulic operating mechanism according to claim 1, characterized in that: A limiting ring is provided on the outer circumference of the bleed screw. In the length direction of the bleed screw, the limiting ring is provided on the side of the seal away from the outer surface of the hydraulic cylinder. The limiting ring is used to squeeze the seal together with the hydraulic cylinder.

9. A clutch system, characterized in that: include: clutch; as well as The hydraulic operating mechanism according to any one of claims 1 to 8, being drivingly connected to the clutch.

10. A vehicle, characterized in that: Comprising a clutch system as claimed in claim 9.

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