A tractor brake cylinder and tractor

Abstract

This utility model provides a tractor brake cylinder and a tractor. The brake cylinder includes a housing, a hydraulic braking assembly and a pressure plate lever disposed inside the housing. The hydraulic braking assembly includes a brake piston, a brake push rod, and a hydraulic brake rocker arm. A hydraulic oil passage is provided at the end of the housing, and the brake piston is disposed in the hydraulic oil passage. The brake piston drives the hydraulic brake rocker arm to rotate through the brake push rod. The hydraulic brake rocker arm drives the pressure plate lever to move, thereby causing the tractor's brake pressure plate to twist. This tractor brake cylinder, through the cooperation of the housing, the hydraulic braking assembly, and the pressure plate lever, allows the brake fluid to act indirectly on the brake pressure plate instead of directly on it, thus effectively reducing the braking system pressure and extending its service life. The tractor brake cylinder has a compact overall structure, achieves tractor braking through mechanical cooperation, and is low in cost and highly reliable.

Description

Technical Field

[0001] This application relates to the field of tractor technology, and in particular to a brake cylinder for a tractor and a tractor. Background Technology

[0002] The tractor braking system is a core component ensuring the safe operation of agricultural machinery, and its performance directly affects operational safety and equipment reliability. Currently, widely used hydraulic braking systems primarily use a plunger pump to convert mechanical energy into hydraulic energy, and then deliver hydraulic oil to the wheel-side brakes via the master cylinder to complete the braking operation. Traditional tractor brakes rely on hydraulic oil directly acting on the friction pads to generate braking torque; this design places high demands on the output pressure of the brake pump.

[0003] Therefore, it is necessary to design a brake cylinder for tractors to solve the problem of high output pressure requirements for brake pumps. Utility Model Content

[0004] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides a brake cylinder for a tractor and a tractor, which effectively solves the problem that the existing hydraulic braking system has high requirements for the output pressure of the brake pump due to its structural design.

[0005] According to a first aspect of the present invention, a brake cylinder for a tractor is provided, wherein the brake cylinder includes a housing, a hydraulic braking assembly disposed inside the housing, and a pressure plate lever. The hydraulic braking assembly includes a brake piston, a brake push rod, and a hydraulic brake rocker arm. A hydraulic oil passage is provided at the end of the housing, and the brake piston is disposed in the hydraulic oil passage. The brake piston drives the hydraulic brake rocker arm to rotate through the brake push rod, and the hydraulic brake rocker arm drives the pressure plate lever to move so that the brake pressure plate of the tractor is twisted.

[0006] Preferably, the tractor brake cylinder further includes a manual brake rocker arm, and the hydraulic braking assembly further includes a brake cylinder shaft. One end of the hydraulic brake rocker arm is disposed on the brake cylinder shaft, the brake cylinder shaft passes through the housing, and the manual brake rocker arm is disposed at the end of the brake cylinder shaft located outside the housing.

[0007] Preferably, the end of the hydraulic brake rocker arm is sleeved on the brake cylinder shaft, and the end of the hydraulic brake rocker arm is fixedly connected to the brake cylinder shaft by a first connecting pin.

[0008] Preferably, the end of the manual brake rocker arm is sleeved on the brake cylinder shaft, and the end of the manual brake rocker arm is fixedly connected to the brake cylinder shaft by a second connecting pin.

[0009] Preferably, the hydraulic brake rocker arm has a through hole in the middle for the pressure plate tie rod to pass through.

[0010] Preferably, the pressure plate pull rod is disposed in the through hole via a connecting clamping assembly, the connecting clamping assembly including a ball sleeve, a connecting nut and a locking nut, the ball sleeve, the connecting nut and the locking nut being sequentially sleeved on the pressure plate pull rod.

[0011] Preferably, the housing includes a main body and an upper shell that are detachably connected to each other, and the interior of the upper shell is provided with a displacement space for the movement of the pressure plate lever.

[0012] Preferably, one end of the pressure plate tie rod is disposed in the displacement space, and the other end of the pressure plate tie rod is located outside the main body.

[0013] Preferably, the hydraulic oil passage has multiple separate vent ports, sensor interfaces and oil inlets, and one end of the brake piston abuts against the vent ports, the sensor interfaces and the oil inlets.

[0014] According to a second aspect of the present invention, a tractor is provided, wherein the tractor includes a tractor brake cylinder as described above.

[0015] According to this utility model, the tractor brake cylinder, through the cooperation of the housing, hydraulic braking assembly, and pressure plate tie rod, allows the brake fluid to act indirectly on the brake pressure plate rather than directly on it. This is achieved through indirect control via the hydraulic braking assembly, thereby effectively reducing the braking system pressure and extending its service life. The tractor brake cylinder has a compact overall structure, achieves tractor braking through mechanical coordination, and is low in cost and highly reliable.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a tractor brake cylinder according to an embodiment of the present invention is shown;

[0019] Figure 2 A side view of a tractor brake cylinder according to an embodiment of the present invention is shown;

[0020] Figure 3 A top view of a tractor brake cylinder according to an embodiment of the present invention is shown;

[0021] Figure 4 A first cross-sectional view of a tractor brake cylinder according to an embodiment of the present invention is shown;

[0022] Figure 5 A second cross-sectional view of a tractor brake cylinder according to an embodiment of the present invention is shown.

[0023] Reference numerals: 1-Housing; 101-Main body; 102-Upper shell; 103-Connecting screw; 104-Displacement space; 105-Oil inlet; 106-Exhaust port; 107-Sensor interface; 2-Pressure plate pull rod; 3-Brake piston; 4-Brake push rod; 5-Hydraulic brake rocker arm; 6-Manual brake rocker arm; 7-Brake cylinder shaft; 801-Ball sleeve; 802-Connecting nut; 803-Locking nut; 9-First connecting pin; 10-Second connecting pin. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] According to a first aspect of this utility model, a brake cylinder for a tractor is provided, such as... Figures 1 to 5 As shown, this tractor brake cylinder is used in a tractor to enable the tractor's braking system to brake. The tractor brake cylinder includes a housing 1, a hydraulic braking assembly, and a pressure plate lever 2.

[0029] In the following description, reference will be made to Figures 1 to 5 This section describes the detailed structure of the tractor's brake cylinder housing 1, hydraulic brake assembly, and pressure plate lever 2.

[0030] like Figures 1 to 5 As shown, in this embodiment, housing 1 is the outer shell of the tractor's brake cylinder, used to house the hydraulic braking assembly and pressure plate lever 2, and to receive hydraulic oil, causing the pressure plate lever 2 to move. The hydraulic braking assembly is located inside housing 1. This hydraulic braking assembly allows the brake oil to not act directly on the brake pressure plate (not shown; the brake pressure plate is a component in the existing tractor braking system, and those skilled in the art will know its structure, so it will not be described in detail here), but rather indirectly controlled through the hydraulic braking assembly. This structure effectively reduces the pressure in the braking system.

[0031] Specifically, the hydraulic braking assembly includes a brake piston 3, a brake push rod 4, and a hydraulic brake rocker arm 5. A hydraulic oil passage is provided at the end of the housing 1 for the inflow of hydraulic oil. The brake piston 3 is disposed within the hydraulic oil passage. A protrusion is provided at the center of the end of the brake piston 3 near the hydraulic oil passage, abutting against the hydraulic oil passage to create a gap for hydraulic oil flow between the end of the brake piston 3 near the hydraulic oil passage and the hydraulic oil passage. A first recess is provided at the end of the brake piston 3 opposite to the hydraulic oil passage for the brake push rod 4 to abut against. The end of the brake push rod 4 is disposed inside this first recess. When the brake piston 3 is pushed towards the hydraulic oil passage by the hydraulic oil... Figure 4When the brake lever 4 moves to the right, its end abuts against the brake piston 3, thus the brake lever 4 is pushed towards the right by the brake piston 3. Figure 4 Move to the right in the middle.

[0032] Furthermore, the first end of the hydraulic brake rocker arm 5 is pivotally disposed inside the housing 1, and the second end of the hydraulic brake rocker arm 5 forms a second recess, with the end of the brake push rod 4 facing away from the brake piston 3 disposed inside the second recess. When the brake push rod 4 is directed towards the brake piston 3... Figure 4 When the right side is pushed, the second end of the hydraulic brake rocker arm 5 is pushed by a force, causing the first end of the hydraulic brake rocker arm 5 to pivot around the rotation inside the housing 1, thereby causing the hydraulic brake rocker arm 5 to move towards... Figure 4 The pressure plate lever 2 moves upwards. Since the pressure plate lever 2 is located in the middle of the hydraulic brake rocker arm 5, it will move upwards along with the hydraulic brake rocker arm 5. Figure 4 The brake moves upward, and then the brake pressure plate is twisted under the action of the pressure plate lever 2. When the brake pressure plate is twisted, the steel ball deviates from the ball groove and generates pressure. The brake friction pads are pressed together under the pressure to achieve parking brake.

[0033] This tractor brake cylinder, through the cooperation of housing 1, hydraulic braking components, and pressure plate lever 2, allows the brake fluid to act indirectly on the brake pressure plate rather than directly on it. This effectively reduces the pressure on the braking system and extends its service life. The tractor brake cylinder has a compact overall structure and achieves tractor braking through mechanical coordination, resulting in low cost and high reliability.

[0034] Preferably, such as Figures 1 to 5 As shown, in this embodiment, the tractor brake cylinder further includes a manual brake rocker arm 6, thus the tractor brake cylinder includes two braking modes: hydraulic braking and manual braking. Hydraulic braking corresponds to the tractor's foot pedal, and manual braking corresponds to the tractor's handbrake. Specifically, the hydraulic braking assembly may also include a brake cylinder shaft 7. One end of the hydraulic brake rocker arm 5 is disposed on the brake cylinder shaft 7, which passes through the housing 1. The manual brake rocker arm 6 is disposed at the end of the brake cylinder shaft 7 located outside the housing 1. When the user uses the manual brake, the manual brake rocker arm 6 is rotated via, for example, the handbrake structure of a tractor. The manual brake rocker arm 6 rotates the brake cylinder shaft 7, which in turn rotates the hydraulic brake rocker arm 5, thereby causing the pressure plate lever 2 to move towards... Figure 4 The upward movement of the tractor enables braking.

[0035] Preferably, such as Figure 4 and Figure 5As shown, in this embodiment, the end of the hydraulic brake rocker arm 5 is sleeved on the brake cylinder shaft 7, and the end of the hydraulic brake rocker arm 5 is fixedly connected to the brake cylinder shaft 7 through the first connecting pin 9.

[0036] Preferably, such as Figure 4 and Figure 5 As shown, in this embodiment, the end of the manual brake rocker arm 6 is sleeved on the brake cylinder shaft 7, and the end of the manual brake rocker arm 6 is fixedly connected to the brake cylinder shaft 7 via a second connecting pin 10. Thus, when braking is achieved, the hydraulic brake rocker arm 5, the manual brake rocker arm 6, and the brake cylinder shaft 7 move together.

[0037] Preferably, such as Figure 4 As shown, in this embodiment, the hydraulic brake rocker arm 5 has a through hole in its middle for the pressure plate tie rod 2 to pass through. The pressure plate tie rod 2 is installed in the through hole.

[0038] Preferably, such as Figure 4 and Figure 5 As shown, in this embodiment, the pressure plate pull rod 2 is disposed in the through hole through a connecting clamping assembly. The connecting clamping assembly may include a ball sleeve 801, a connecting nut 802, and a locking nut 803. The ball sleeve 801, the connecting nut 802, and the locking nut 803 are sequentially sleeved on the pressure plate pull rod 2, and the pressure plate pull rod 2 is fixedly installed in the middle of the hydraulic brake rocker arm 5.

[0039] Preferably, such as Figures 1 to 5 As shown, in this embodiment, the housing 1 may include a main body 101 and an upper shell 102 that are detachably connected to each other. The main body 101 and the upper shell 102 are detachably connected by connecting screws 103. Multiple connecting screws 103 are respectively disposed at both ends of the main body 101 and the upper shell 102 to strengthen the fixation. Furthermore, the upper shell 102 has a displacement space 104 inside for the movement of the pressure plate pull rod 2. The displacement space 104 ensures that the interior of the housing 1 has sufficient space for the pressure plate pull rod 2 to move.

[0040] Preferably, such as Figures 1 to 5 As shown, in this embodiment, one end of the pressure plate tie rod 2 is disposed in the displacement space 104, and the other end of the pressure plate tie rod 2 is located outside the main body 101. The connecting end of the pressure plate tie rod 2 is located outside the main body 101 so that it can be connected to other components in the tractor's braking system.

[0041] Preferably, such as Figure 4 As shown, in this embodiment, the hydraulic oil passage has an oil inlet 105, an exhaust port 106 and a sensor interface 107 that are separated from each other, and one end of the brake piston 3 simultaneously abuts against the three interfaces: the oil inlet 105, the exhaust port 106 and the sensor interface 107.

[0042] The operating principle of the tractor's brake cylinder is as follows: When hydraulic braking is required, brake hydraulic oil enters the brake cylinder through the oil inlet 105 of the housing 1. Under the action of oil pressure, the brake piston 3 moves towards... Figure 4 As the brake piston moves to the right, the brake push rod 4 follows the brake piston 3 toward... Figure 4 The movement to the right causes the hydraulic brake rocker arm 5 to rotate around the brake cylinder shaft 7, so that the pressure plate lever 2 moves in the same direction as the hydraulic brake rocker arm 5. Figure 4 The brake disc moves upward, and under the action of the pressure plate lever 2, the brake disc twists. When the brake disc twists, the steel balls deviate from the ball grooves, generating pressure. The brake friction pads are pressed together under the pressure, achieving parking brake. When manual braking is required, the user drives the manual brake rocker arm 6 to rotate through, for example, the handbrake mechanism of a tractor. The manual brake rocker arm 6 drives the brake cylinder shaft 7 to rotate, and the brake cylinder shaft 7 drives the hydraulic brake rocker arm 5 to rotate, which in turn drives the pressure plate lever 2 to move upward. Figure 4 The brake moves upward, and the brake pressure plate is twisted under the action of the pressure plate lever 2. When the brake pressure plate is twisted, the steel ball deviates from the ball groove and generates pressure. The brake friction pads are pressed together under the pressure to achieve parking brake.

[0043] This tractor brake cylinder, through the cooperation of its housing, hydraulic braking components, and pressure plate linkage, allows the brake fluid to act indirectly on the brake pressure plate rather than directly on it. This effectively reduces the pressure on the braking system and extends its service life. The tractor brake cylinder has a compact overall structure and achieves tractor braking through mechanical coordination, resulting in low cost and high reliability.

[0044] Furthermore, according to a second aspect of the present invention, a tractor is provided, the tractor including the tractor brake cylinder as described above.

[0045] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A brake cylinder for a tractor, characterized in that, The tractor brake cylinder includes a housing, a hydraulic brake assembly and a pressure plate lever disposed inside the housing. The hydraulic brake assembly includes a brake piston, a brake push rod and a hydraulic brake rocker arm. A hydraulic oil passage is provided at the end of the housing. The brake piston is disposed in the hydraulic oil passage. The brake piston drives the hydraulic brake rocker arm to rotate through the brake push rod. The hydraulic brake rocker arm drives the pressure plate lever to move so that the tractor's brake pressure plate is twisted.

2. The tractor brake cylinder according to claim 1, characterized in that, The tractor brake cylinder also includes a manual brake rocker arm, and the hydraulic brake assembly also includes a brake cylinder shaft. One end of the hydraulic brake rocker arm is disposed on the brake cylinder shaft, the brake cylinder shaft passes through the housing, and the manual brake rocker arm is disposed at the end of the brake cylinder shaft located outside the housing.

3. The tractor brake cylinder according to claim 2, characterized in that, The end of the hydraulic brake rocker arm is sleeved on the brake cylinder shaft, and the end of the hydraulic brake rocker arm is fixedly connected to the brake cylinder shaft through a first connecting pin.

4. The tractor brake cylinder according to claim 2, characterized in that, The end of the manual brake rocker arm is sleeved on the brake cylinder shaft, and the end of the manual brake rocker arm is fixedly connected to the brake cylinder shaft by a second connecting pin.

5. The tractor brake cylinder according to claim 1, characterized in that, The hydraulic brake rocker arm has a through hole in the middle for the pressure plate tie rod to pass through.

6. The tractor brake cylinder according to claim 5, characterized in that, The pressure plate pull rod is disposed in the through hole via a connecting clamping assembly. The connecting clamping assembly includes a ball sleeve, a connecting nut, and a locking nut, which are sequentially sleeved on the pressure plate pull rod.

7. The tractor brake cylinder according to claim 1, characterized in that, The housing includes a main body and an upper shell that are detachably connected to each other, and the interior of the upper shell is provided with a displacement space for the movement of the pressure plate lever.

8. The tractor brake cylinder according to claim 7, characterized in that, One end of the pressure plate tie rod is located in the displacement space, and the other end of the pressure plate tie rod is located outside the main body.

9. The tractor brake cylinder according to claim 1, characterized in that, The hydraulic oil passage has multiple separate exhaust ports, sensor interfaces and oil inlets, and one end of the brake piston abuts against the exhaust ports, the sensor interfaces and the oil inlets.

10. A tractor, characterized in that, The tractor includes a tractor brake cylinder according to any one of claims 1 to 9.

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