A brake and an engineering machine

Abstract

The utility model relates to engineering machinery technical field especially, and it is a kind of brake and engineering machinery, brake includes casing, friction subassembly, piston and return piece, casing is spaced apart with bearing seat and end cover, friction subassembly includes the first brake shoe, friction plate and second brake shoe that are sequentially arranged, first brake shoe is towards bearing seat, second brake shoe is towards end cover, piston is between second brake shoe and end cover, piston and end cover between form piston cavity, casing is provided with the oil channel of the communication piston cavity, hydraulic oil enters piston cavity through oil channel can drive piston and push against bearing seat, make bearing seat push against first brake shoe and move and with second brake shoe jointly and tightly resist friction plate, return piece is used to provide the force that forces piston away from friction plate;Engineering machinery includes the brake described above.The brake effectively reduces the wear and tear of bearing seat, piston and other components, and effectively guarantees the reliable return of piston.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a brake and engineering machinery. Background Technology

[0002] In the field of agricultural machinery, tractors and other equipment are widely used in agricultural production operations, and the performance of their braking systems directly affects operational safety and efficiency. However, existing agricultural machinery braking technology has significant shortcomings and urgently needs improvement.

[0003] Specifically, another key problem exists in the structural design of existing braking systems. The bearing housing and piston together form the friction pair of the brake pads. During long-term, high-intensity operation, continuous friction occurs between the brake pads and the bearing housing and piston, leading to gradual wear on both surfaces. As the wear intensifies, the fit between the bearing housing and piston decreases, significantly reducing braking effectiveness. Currently, the main solution is to replace the severely worn bearing housing and piston as a whole. However, this solution is not only costly to maintain but also involves a complex replacement process requiring specialized technicians, increasing the maintenance burden on farmers. Furthermore, most agricultural machinery brakes lack a return mechanism, preventing effective separation of the friction pads and piston during braking. When braking is complete, the friction pads and piston struggle to quickly disengage, leaving the braking system in a semi-braking state. This incomplete disengagement not only increases the frictional resistance of the braking system but also generates abnormally high temperatures during braking. Prolonged high-temperature feedback accelerates the aging of braking materials, reduces braking performance, and may even pose safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide a brake that reduces wear on the bearing housing and piston, and effectively ensures reliable piston return.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A brake, comprising:

[0007] The housing is provided with bearing seats and end caps spaced apart.

[0008] A friction assembly is located between the bearing housing and the end cover. The friction assembly includes a first brake pad, a friction pad, and a second brake pad arranged in sequence. The first brake pad faces the bearing housing, and the second brake pad faces the end cover.

[0009] A piston is located between the second brake pad and the end cap, and a piston cavity is formed between the piston and the end cap. The housing has an oil passage that communicates with the piston cavity. Hydraulic oil enters the piston cavity through the oil passage and drives the piston to push against the bearing seat, so that the bearing seat pushes against the first brake pad and the second brake pad together to press against the friction pad.

[0010] A return element is used to provide a force that forces the piston away from the friction plate.

[0011] Preferably, the return member includes a spring, with a first end connected to the end cap and a second end connected to the piston.

[0012] Preferably, a connector is fixedly provided at the end of the piston facing away from the second brake pad, the end cap and the connector together form an installation space, the spring is disposed in the installation space, and the first end of the spring is connected to the connector.

[0013] Preferably, the end cap is provided with a limiting part, and the side end face of the piston facing away from the second brake pad can abut against the limiting part.

[0014] Preferably, the housing has a perforation, and the bearing seat, the end cap, the friction assembly and the piston are all disposed in the perforation.

[0015] Preferably, the perforation includes a first hole, a second hole, and a third hole arranged in a stepped manner, with the diameters of the first hole, the second hole, and the third hole increasing sequentially. A first stepped surface connects the first hole and the second hole, and a second stepped surface connects the second hole and the third hole.

[0016] The bearing housing includes a first seat portion and a second seat portion with stepped outer peripheries. The diameter of the first seat portion is smaller than that of the second seat portion. A third stepped surface connects the first seat portion and the second seat portion. The first seat portion is inserted into a first hole portion, and the second seat portion is inserted into the second hole portion. The third stepped surface abuts against the first stepped surface. The end cap includes a first cover portion and a second cover portion with stepped outer peripheries. The diameter of the first cover portion is smaller than that of the second cover portion. A fourth stepped surface connects the first cover portion and the second cover portion. The first cover portion is inserted into the second hole portion, and the second cover portion is inserted into the third hole portion. The fourth stepped surface abuts against the second stepped surface.

[0017] The first brake pad, the friction pad, the second brake pad, and the piston are all disposed within the second hole.

[0018] Preferably, the outer peripheral walls of the first brake pad, the friction pad, and the second brake pad are all in contact with the inner peripheral wall of the second hole.

[0019] Preferably, the friction plate has a through hole for the axle to pass through, the axle has a first meshing tooth on its outer circumference, and the inner wall of the through hole has a second meshing tooth that meshes with the first meshing tooth.

[0020] Preferably, the housing is provided with a first hinge joint, a second hinge joint, and a third hinge joint; wherein,

[0021] The first hinge joint is used to hinge with the pull-down rod;

[0022] The second hinge joint is used to hinge with the lifting cylinder;

[0023] The third hinge joint is used to hinge with the swing arm.

[0024] This utility model also provides an engineering machine, including the above-mentioned brake, which reduces wear on components such as bearing seats and pistons, and effectively ensures reliable piston return, thereby effectively improving braking performance.

[0025] Construction machinery, including the brake described in any of the above, also includes a chassis, with the housing fixedly mounted on the chassis.

[0026] Beneficial effects:

[0027] The brake provided by this utility model includes a friction assembly comprising a first brake pad, a friction pad, and a second brake pad arranged sequentially. The first brake pad faces the side where the bearing housing is located, and the second brake pad faces the side where the end cover is located. During braking, hydraulic oil enters the piston chamber through the oil passage, thereby driving the piston to push the bearing housing towards the side where the friction pad is located. This causes the bearing housing to push the first brake pad towards the side where the friction pad is located, i.e., closer to the second brake pad. This results in the first and second brake pads working together to tightly press against the friction pad, achieving friction and locking of the friction pad. Replacing the friction pairs on both sides of the friction pad with the first and second brake pads effectively reduces wear on the bearing housing and piston surfaces. When the friction pairs need to be replaced, only the first and second brake pads need to be replaced, eliminating the need to replace the entire bearing housing and piston, thus reducing maintenance costs. Furthermore, by incorporating a return mechanism, after braking is complete, the return mechanism provides a return force, forcing the piston away from the friction pad, releasing the piston's push against the second brake pad, ensuring effective separation between the piston and the friction pair, avoiding abnormally high temperatures, and ensuring braking performance.

[0028] This utility model also provides an engineering machine that includes the above-mentioned brake, which reduces wear on components such as bearing seats and pistons, and effectively ensures reliable piston return, thereby effectively improving braking performance. Attached Figure Description

[0029] Figure 1 A schematic diagram of the brake provided by this utility model;

[0030] Figure 2 A cross-sectional schematic diagram of the brake provided by this utility model.

[0031] In the picture:

[0032] 1. Housing; 101. Oil passage; 11. Bearing housing; 111. First seat portion; 112. Second seat portion; 113. Third stepped surface; 12. End cap; 121. First cover portion; 122. Second cover portion; 123. Fourth stepped surface; 13. Limiting portion; 141. First hole portion; 142. Second hole portion; 143. Third hole portion; 144. First stepped surface; 145. Second stepped surface; 15. First hinge joint; 16. Second hinge joint; 17. Third hinge joint;

[0033] 2. Friction assembly; 21. First brake pad; 22. Friction pad; 221. Through hole; 23. Second brake pad;

[0034] 3. Piston; 31. Connector;

[0035] 4. Return parts. Detailed Implementation

[0036] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "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. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] This embodiment provides a brake. (Refer to...) Figures 1 to 2As shown, the brake includes a housing 1, a friction assembly 2, a piston 3, and a return member 4. The housing 1 has a bearing seat 11 and an end cap 12 spaced apart. The friction assembly 2 is located between the bearing seat 11 and the end cap 12, and includes a first brake pad 21, a friction pad 22, and a second brake pad 23 arranged sequentially. The first brake pad 21 faces the bearing seat 11, and the second brake pad 23 faces the end cap 12. The piston 3 is located between the second brake pad 23 and the end cap 12, forming a piston 3 chamber. The housing 1 has an oil passage 101 communicating with the piston 3 chamber. Hydraulic oil enters the piston 3 chamber through the oil passage 101, driving the piston 3 to push against the bearing seat 11, causing the bearing seat 11 to push against the first brake pad 21 and the second brake pad 23, which together press against the friction pad 22. The return member 4 provides a force to force the piston 3 away from the friction pad 22.

[0041] In this embodiment, the friction assembly 2 includes a first brake pad 21, a friction pad 22, and a second brake pad 23 arranged sequentially. The first brake pad 21 faces the side where the bearing seat 11 is located, and the second brake pad 23 faces the side where the end cover 12 is located. When braking is performed, hydraulic oil enters the piston 3 chamber through the oil passage 101, thereby driving the piston 3 to push the bearing seat 11 towards the side where the friction pad 22 is located. This causes the bearing seat 11 to push the first brake pad 21 towards the direction of the friction pad 22, i.e., towards the side close to the second brake pad 23. Consequently, the first brake pad 21 and the second brake pad 23 work together to tightly press against the friction pad 22, achieving friction and locking of the friction pad 22. Replacing the friction pairs on both sides of the friction pad 22 with the first brake pad 21 and the second brake pad 23 effectively reduces the wear of the friction pad 22 on the surfaces of the bearing seat 11 and the piston 3. When the friction pairs need to be replaced, only the first brake pad 21 and the second brake pad 23 need to be replaced, without having to replace the entire bearing seat 11 and the piston 3, thus reducing maintenance costs. In addition, by setting the return member 4, after braking is completed, the return member 4 provides a return force, forcing the piston 3 away from the friction pad 22, releasing the piston 3 from pushing against the second brake pad 23, ensuring effective separation between the piston 3 and the friction pair, avoiding the generation of abnormal high temperature, and ensuring braking performance.

[0042] Specifically, in this embodiment, the first brake pad 21 is fixedly connected to the bearing housing 11, and the second brake pad 23 is fixedly connected to the piston 3. Specifically, the first brake pad 21 and the bearing housing 11, as well as the second brake pad 23 and the piston 3, can be fixedly connected by bolts.

[0043] In this embodiment, the first brake pad 21 and the second brake pad 23 are both made of steel, that is, the first brake pad 21 and the second brake pad 23 together form a pair of steel pads.

[0044] In this embodiment, the return member 4 includes a spring, with its first end connected to the end cap 12 and its second end connected to the piston 3. Specifically, during braking, hydraulic oil enters the piston 3 chamber through the oil passage 101, thereby driving the piston 3 to push against the bearing seat 11 towards the side where the friction plate 22 is located, at which time the spring deforms; after braking is completed, the hydraulic oil in the piston 3 chamber is depressurized, and at this time, under the action of the elastic force of the spring, the piston 3 can be driven to move away from the friction plate 22 and finally return to its original position.

[0045] In this embodiment, a connector 31 is fixedly provided at the end of the piston 3 facing away from the second brake pad 23. The end cap 12 and the connector 31 together form an installation space. The spring is disposed in the installation space, and the first end of the spring is connected to the connector 31. Specifically, the installation space is designed to reliably accommodate the spring, preventing the spring from being exposed, and the connector 31 also provides a dedicated connection area for the spring, thereby realizing the connection between the spring and the piston 3.

[0046] Optionally, the connector 31 and the piston 3 are fixedly connected by bolts.

[0047] In this embodiment, the end cap 12 is provided with a limiting part 13, and the end face of the piston 3 facing away from the second brake pad 23 can abut against the limiting part 13. Specifically, when the piston 3 is in the return state, the end face of the piston 3 facing away from the second brake pad 23 remains in contact with the limiting part 13 to ensure that the position of the piston 3 is reliable and stable.

[0048] In this embodiment, the housing 1 has a through hole, and the bearing seat 11, end cap 12, friction assembly 2 and piston 3 are all disposed in the through hole. Specifically, the axle passes through the through hole and extends into the housing 1, and in the process, the axle passes through the end cap 12, piston 3, friction assembly 2 and bearing seat 11.

[0049] Specifically, the perforation includes a first hole portion 141, a second hole portion 142, and a third hole portion 143 arranged in a stepped manner. The diameters of the first hole portion 141, the second hole portion 142, and the third hole portion 143 increase sequentially. A first stepped surface 144 connects the first hole portion 141 and the second hole portion 142, and a second stepped surface 145 connects the second hole portion 142 and the third hole portion 143.

[0050] The bearing housing 11 includes a first seat portion 111 and a second seat portion 112 arranged in a stepped shape on their outer periphery. The diameter of the first seat portion 111 is smaller than that of the second seat portion 112. A third stepped surface 113 connects the first seat portion 111 and the second seat portion 112. The first seat portion 111 is inserted into a first hole portion 141, and the second seat portion 112 is inserted into a second hole portion 142. The third stepped surface 113 abuts against the first stepped surface 144. The end cap 12 includes a first cap portion 121 and a second cap portion 122 arranged in a stepped shape on their outer periphery. The diameter of the first cap portion 121 is smaller than that of the second cap portion 122. A fourth stepped surface 123 connects the first cap portion 121 and the second cap portion 122. The first cap portion 121 is inserted into a second hole portion 142, and the second cap portion 122 is inserted into a third hole portion 143. The fourth stepped surface 123 abuts against the second stepped surface 145. When installing the bearing housing 11, the first seat portion 111 is inserted into the first hole portion 141, the second seat portion 112 is inserted into the second hole portion 142, and the third stepped surface 113 abuts against the first stepped surface 144 when the bearing housing 11 is fully installed, thereby achieving the positioning and fixing of the bearing housing 11. When installing the end cover 12, the first cover portion 121 is inserted into the second hole portion 142, the second cover portion 122 is inserted into the third hole portion 143, and the fourth stepped surface 123 abuts against the second stepped surface 145 when the bearing housing 11 is fully installed, thereby achieving the positioning and fixing of the end cover 12. Further, the first brake pad 21, the friction pad 22, the second brake pad 23, and the piston 3 are all disposed in the second hole portion 142. Specifically, the friction assembly 2 is located between the second seat portion 112 and the first cover portion 121, the first brake pad 21 is correspondingly disposed with the second seat portion 112, and the second brake pad 23 is correspondingly disposed with the first cover portion 121.

[0051] In this embodiment, the bearing housing 11 and the housing 1, as well as the end cover 12 and the housing 1, are fixedly connected by bolts.

[0052] In this embodiment, the outer peripheral walls of the first brake pad 21, friction pad 22, and second brake pad 23 are all in contact with the inner peripheral wall of the second hole 142. This arrangement ensures that the first brake pad 21, friction pad 22, and second brake pad 23 move strictly along the axial direction of the second hole 142, i.e., the axial direction of the perforation, preventing the first brake pad 21, friction pad 22, and second brake pad 23 from moving freely and affecting the tight contact effect.

[0053] Optionally, the thickness of the first brake pad 21 and the second brake pad 23 can be adaptively adjusted according to a preset braking distance.

[0054] In this embodiment, the friction plate 22 has a through hole 221 for the axle to pass through. The axle has a first meshing tooth on its outer periphery, and the inner wall of the through hole 221 has a second meshing tooth that meshes with the first meshing tooth. Specifically, when the axle and the friction plate 22 are assembled, the axle passes through the through hole 221, and the first meshing tooth meshes with the second meshing tooth. This arrangement can prevent misalignment between the axle and the friction plate 22.

[0055] In this embodiment, the housing 1 is provided with a first hinge joint 15, a second hinge joint 16, and a third hinge joint 17. The first hinge joint 15 is used to hinge with the pull-down rod; the second hinge joint 16 is used to hinge with the lifting cylinder; and the third hinge joint 17 is used to hinge with the swing arm. Specifically, the first hinge joint 15 has a first hinge hole, and the pull-down rod is hinged to the first hinge hole via a first hinge shaft. The second hinge joint 16 has a second hinge hole, and the cylinder body of the lifting cylinder is hinged to the second hinge hole via a second hinge shaft. The third hinge joint 17 has a third hinge hole, and the swing arm is hinged to the third hinge hole via a third hinge shaft. The housing 1 is integrally formed with the first hinge joint 15, the second hinge joint 16, and the third hinge joint 17, enabling direct connection with the pull-down rod, the lifting cylinder, and the swing arm, reducing the number of external connecting parts, simplifying the overall structure of the housing 1, and improving functionality and integration.

[0056] This embodiment also provides a piece of engineering machinery, including the brake of any of the above-mentioned types, and a chassis, with the housing 1 fixedly mounted on the chassis. The engineering machinery, including the aforementioned brake, reduces wear on components such as the bearing housing 11 and the piston 3, and effectively ensures the reliable return of the piston 3, thereby effectively improving braking performance.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A brake, characterized in that, include: The housing (1) is provided with a bearing seat (11) and an end cap (12) spaced apart. The friction assembly (2) is located between the bearing seat (11) and the end cover (12). The friction assembly (2) includes a first brake pad (21), a friction pad (22) and a second brake pad (23) arranged in sequence. The first brake pad (21) faces the bearing seat (11) and the second brake pad (23) faces the end cover (12). The piston (3) is located between the second brake pad (23) and the end cap (12). A piston cavity is formed between the piston (3) and the end cap (12). The housing (1) has an oil passage (101) that communicates with the piston cavity. Hydraulic oil enters the piston cavity through the oil passage (101) and drives the piston (3) to push against the bearing seat (11), so that the bearing seat (11) pushes against the first brake pad (21) and the second brake pad (23) together to press against the friction pad (22). Return member (4) is used to provide a force that forces the piston (3) away from the friction plate (22).

2. The brake according to claim 1, characterized in that, The return component (4) includes a spring, the first end of which is connected to the end cap (12) and the second end of which is connected to the piston (3).

3. The brake according to claim 2, characterized in that, The piston (3) is fixedly provided with a connector (31) at one end facing away from the second brake pad (23). The end cap (12) and the connector (31) together form an installation space. The spring is located in the installation space, and the first end of the spring is connected to the connector (31).

4. The brake according to claim 1, characterized in that, The end cap (12) is provided with a limiting part (13), and the end face of the piston (3) facing away from the second brake pad (23) can abut against the limiting part (13).

5. The brake according to claim 1, characterized in that, The housing (1) has a through hole, and the bearing seat (11), the end cap (12), the friction assembly (2) and the piston (3) are all located in the through hole.

6. The brake according to claim 5, characterized in that, The perforation includes a first hole (141), a second hole (142), and a third hole (143) arranged in a stepped manner. The diameters of the first hole (141), the second hole (142), and the third hole (143) increase sequentially. A first stepped surface (144) connects the first hole (141) and the second hole (142), and a second stepped surface (145) connects the second hole (142) and the third hole (143). The bearing housing (11) includes a first seat portion (111) and a second seat portion (112) arranged in a stepped shape on their outer periphery. The diameter of the first seat portion (111) is smaller than that of the second seat portion (112). A third stepped surface (113) connects the first seat portion (111) and the second seat portion (112). The first seat portion (111) is inserted into the first hole portion (141), and the second seat portion (112) is inserted into the second hole portion (142). The third stepped surface (113) abuts against the first stepped surface (144). The end cap (12) includes a first cap portion (121) and a second cap portion (122) with a stepped outer periphery. The diameter of the first cap portion (121) is smaller than that of the second cap portion (122). A fourth stepped surface (123) connects the first cap portion (121) and the second cap portion (122). The first cap portion (121) is inserted into the second hole portion (142), and the second cap portion (122) is inserted into the third hole portion (143). The fourth stepped surface (123) abuts against the second stepped surface (145). The first brake pad (21), the friction pad (22), the second brake pad (23) and the piston (3) are all disposed in the second hole (142).

7. The brake according to claim 6, characterized in that, The outer peripheral walls of the first brake pad (21), the friction pad (22), and the second brake pad (23) are all in contact with the inner peripheral wall of the second hole (142).

8. The brake according to claim 1, characterized in that, The friction plate (22) has a through hole (221) for the axle to pass through. The axle has a first meshing tooth on its outer circumference and a second meshing tooth that meshes with the first meshing tooth on the inner wall of the through hole (221).

9. The brake according to claim 1, characterized in that, The housing (1) is provided with a first hinge joint (15), a second hinge joint (16), and a third hinge joint (17); wherein, The first hinge joint (15) is used to hinge with the pull rod; The second hinge joint (16) is used to hinge with the lifting cylinder; The third hinge joint (17) is used to hinge with the swing arm.

10. An engineering machinery, characterized in that, The device includes the brake as described in any one of claims 1-9, and also includes a chassis, wherein the housing (1) is fixedly disposed on the chassis.

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