A new type of hydraulic motor braking device

Abstract

The utility model relates to hydraulic motor technical field especially relates to a new type hydraulic motor brake device, including motor cover, brake spring support ring, brake spring, brake piston, partition and friction plate. Through the interference fit of brake spring and support ring, again with the clearance fit between motor cover, the fixation and follow -up rotation of spring have been realized, effectively avoided the shearing damage, prolonged the service life, reduced the processing and assembly cost simultaneously. The utility model has the advantages of simple structure, convenient installation, stable brake effect, is applicable to all kinds of hydraulic motor brake system.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic motor technology, and in particular to a novel hydraulic motor braking device. Background Technology

[0002] When a hydraulic motor is in operation, it needs to be controlled by a braking system to start and stop. When the motor cuts off the oil circuit, the clamping force of the brake spring will cause the brake piston to press against the friction plate, thereby generating friction and forming a reverse torque to achieve the purpose of braking.

[0003] Currently, the braking system structure on the market consists of a motor cover, brake spring, brake piston, separator, and friction pads, but this structure has the following problems:

[0004] After a period of use, the brakes often become weak, requiring the brake springs to be replaced.

[0005] The motor cover requires machining multiple spring mounting holes to fix the brake spring, resulting in long machining time and high cost.

[0006] There is friction between the brake spring and the brake piston. When the brake piston rotates (one end of the spring is fixed to the motor cover), it will cause shear damage to the spring, shortening its service life.

[0007] During assembly, brake springs are prone to falling off or slipping, which reduces production efficiency. Utility Model Content

[0008] The purpose of this invention is to provide a novel hydraulic motor braking device to extend the service life of the brake spring, reduce processing costs, and improve installation efficiency.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a novel hydraulic motor braking device, comprising a motor cover, a brake spring, a brake piston, a separator, and a friction plate, and further comprising a brake spring support ring, wherein the brake spring support ring and the brake spring are interference-fitted, and the brake spring support ring and the motor cover are assembled together as a whole and disposed in the inner cavity of the brake piston.

[0010] As a further improvement of this utility model, the brake spring support ring is annular, with outward flanges at both axial ends to limit the axial displacement of the brake spring.

[0011] As a further improvement of this utility model, the brake spring support ring is made of plastic.

[0012] As a further improvement of this utility model, the inner side of the brake spring support ring is provided with positioning grooves with openings evenly distributed along the circumference, for interference fit with the brake spring.

[0013] As a further improvement of this utility model, the outer diameter of the brake spring is 11+0.1 / 0mm, and the diameter of the hole on the brake spring support ring that mates with the spring is 11+0 / -0.5mm.

[0014] As a further improvement of this utility model, the outer diameter of the brake spring support ring forms a radial gap of 0.8-1.2mm at the mating point between the motor cover and the support ring.

[0015] As a further improvement of this utility model, the maximum interference between the brake spring and the brake spring support ring is 0.6 mm.

[0016] As a further improvement of this utility model, the outer diameter of the brake spring support ring and the inner diameter of the brake piston are in clearance fit, with a clearance range of 0.1-0.3mm.

[0017] The beneficial effects of this utility model are as follows: 1. The brake spring and the support ring form an integral structure, which can rotate together with the brake piston during braking, avoiding the spring from being subjected to shear force. In the existing structure, the spring is generally replaced every 3 months, while the structure of this utility model can extend the service life to 5 months or more; 2. It eliminates the process of machining spring mounting holes on the motor cover, reducing manufacturing costs; 3. The assembly process is simple, and there is no need to use grease to fix the spring, avoiding the problem of spring falling off and improving assembly efficiency; 4. The support ring is made of plastic, which has a certain degree of elasticity, is easy to assemble, and has good wear resistance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the braking system structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the braking system structure in the prior art;

[0020] Figure 3 This is a schematic diagram of the brake spring support ring structure for mounting the brake spring according to this utility model;

[0021] Figure 4 This is a schematic diagram of the brake spring support ring structure of this utility model.

[0022] Figure 5 This is a top view of the present invention;

[0023] Figure 6 This is a partial view of the braking structure of this utility model;

[0024] In the diagram: 1. Motor cover; 2. Brake spring support ring; 3. Brake spring; 4. Brake piston; 5. Separator; 6. Friction plate; 7. Positioning groove. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0028] Please see Figures 1 to 6 This utility model provides a novel hydraulic motor braking device, including a motor cover 1, a brake spring 3, a brake piston 4, a separator 5, and a friction plate 6. It also includes a brake spring support ring 2, which is interference-fitted with the brake spring 3. The brake spring support ring 2 and the motor cover 1 are integrally disposed within the brake piston 4. This ensures that the brake spring 3 is securely mounted on the brake spring support ring 2, preventing displacement of the brake spring 3 during device operation and reducing the torque exerted on the brake spring 3 by the rotation of the brake piston 4 during braking, thereby extending the spring's service life. The brake spring support ring 2 and the motor cover 1 are clearance-fitted, facilitating the installation and removal of both components. Simultaneously, during device operation, a certain relative space between them is allowed to accommodate possible minor deformations or displacements.

[0029] The brake spring support ring 2 is annular with outward-flared flanges at both axial ends to limit the axial displacement of the brake spring 3. The brake spring support ring 2 is made of plastic. Plastic has good insulation, corrosion resistance, and a certain degree of elasticity. Its elastic properties can, to some extent, buffer the vibration and impact forces of the brake spring 3 during operation, helping to extend the service life of the brake spring 3. At the same time, compared to metal, plastic is lighter, reducing the overall weight of the braking device and lowering costs, thus reducing manufacturing costs.

[0030] The inner side of the brake spring support ring 2 is provided with locating grooves 7, evenly distributed along the circumference, for interference fit with the brake spring 3. By reasonably setting the position and number of these locating grooves 7, the installation layout of the brake spring 3 on the brake spring support ring 2 can be changed, thereby flexibly adjusting the distribution of the clamping force of the brake spring 3 on the brake piston 4. For example, when it is necessary to focus on enhancing the braking effect in a certain area, the brake spring 3 can be installed at the corresponding mounting hole, so that the area receives greater clamping force, thereby improving the braking performance of the entire braking device.

[0031] The outer diameter of the brake spring 3 is 11+0.1 / 0 mm, and the diameter of the hole on the brake spring support ring 2 that mates with the spring is 11+0 / -0.5 mm. This interference fit ensures sufficient clamping force between the brake spring 3 and the brake spring support ring 2, preventing the brake spring 3 from dislodging from the mounting hole of the brake spring support ring 2 during operation, while also preventing installation difficulties due to excessive interference fit, thus ensuring ease and stability in assembly.

[0032] The outer diameter of the brake spring support ring 2 forms a radial clearance of 0.8-1.2 mm with the motor cover 1 and the support ring mating area. The outer diameter of the brake spring support ring 2 is 120 mm, and the inner diameter of the motor cover 1 and the support ring mating area is 121 mm. This clearance design ensures that the brake spring support ring 2 can be smoothly installed into the motor cover 1. At the same time, the appropriate clearance between the two prevents jamming caused by thermal expansion and contraction or minor deformation during device operation, ensuring that the brake spring support ring 2 can move relatively freely within the motor cover 1 and maintain the normal operation of the device.

[0033] The maximum interference fit between the brake spring 3 and the brake spring support ring 2 is 0.6mm. This maximum interference fit limit ensures that, while maintaining a tight fit between the brake spring 3 and the brake spring support ring 2, excessive interference fit will not damage either the brake spring 3 or the brake spring support ring 2. In actual production and assembly processes, controlling the interference fit within a certain range helps ensure the stability and consistency of product quality, while also facilitating assembly operations and improving production efficiency.

[0034] During assembly, first insert the brake spring 3 into the brake spring support ring 2. Since the two are interference-fitted, the brake spring 3 can be securely fixed to the brake spring support ring 2. Then, place the brake spring support ring 2 and the brake spring 3 together on the brake piston 4, and finally install the motor cover 1. Because the brake spring support ring 2 and the motor cover 1 are clearance-fitted, the assembly process is convenient and efficient, and avoids the problem of the brake spring 3 falling off or slipping. The existing structure requires first fixing the brake spring 3 into the positioning groove on the motor cover 1 with grease, and then inverting the motor cover 1 for installation. During this process, the brake spring is prone to falling off, and significant shaking is not allowed during installation, resulting in low installation efficiency. The existing structure only requires placing the brake spring and brake support ring together on the brake piston.

[0035] During braking, the rotating cylinder drives the friction pads 6 to rotate. The friction between the friction pads 6 and the brake piston 4 causes the brake piston 4 to rotate. The brake spring 3 and the brake spring support ring 2, as a whole, rotate together with the brake piston 4, eliminating shear damage and extending the service life of the brake spring 3. At the same time, the multiple positioning grooves on the brake spring support ring 2 can adjust the distribution of the clamping force, enhancing the braking effect.

[0036] This utility model effectively solves the problems of short service life of brake springs, high processing cost of motor cover and low assembly efficiency in the prior art by adding a brake spring support ring, and has significant practical value.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A novel hydraulic motor braking device, comprising a motor cover (1), a brake spring (3), a brake piston (4), a separator (5), and a friction plate (6), characterized in that: It also includes a brake spring support ring (2), which is an interference fit with the brake spring (3) and a clearance fit with the motor cover (1). After the brake spring support ring (2) and the motor cover (1) are assembled, they are set as a whole in the inner cavity of the brake piston (4).

2. The novel hydraulic motor braking device according to claim 1, characterized in that: The brake spring support ring (2) is annular, with outward flanges at both ends of its axial direction to limit the axial displacement of the brake spring (3).

3. The novel hydraulic motor braking device according to claim 2, characterized in that: The brake spring support ring (2) is made of plastic.

4. The novel hydraulic motor braking device according to claim 1, characterized in that: The inner side of the brake spring support ring (2) is provided with a positioning groove (7) with an opening evenly distributed along the circumference, which is used to interfere with the brake spring (3).

5. The novel hydraulic motor braking device according to claim 1, characterized in that: The outer diameter of the brake spring (3) is 11+0.1 / 0 mm, and the diameter of the hole on the brake spring support ring (2) that mates with the spring is 11+0 / -0.5 mm.

6. The novel hydraulic motor braking device according to claim 1, characterized in that: The outer diameter of the brake spring support ring (2) forms a radial gap of 0.8-1.2 mm at the mating point between the motor cover (1) and the support ring.

7. The novel hydraulic motor braking device according to claim 1, characterized in that: The maximum interference between the brake spring (3) and the brake spring support ring (2) is 0.6 mm.

8. The novel hydraulic motor braking device according to claim 1, characterized in that: The outer diameter of the brake spring support ring (2) and the inner diameter of the brake piston (4) are in clearance fit, with a clearance range of 0.1-0.3 mm.

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