Hydraulic motor with brake assembly and good heat dissipation performance

Abstract

The utility model discloses a hydraulic motor with a brake assembly, which has better heat dissipation performance and is characterized in that the brake assembly is arranged in a motor front cover, the brake assembly is arranged in a brake containing cavity, the brake containing cavity is communicated with a flushing oil port, a first cooling gap is arranged between the motor front cover and an output shaft, and a bearing is arranged on the inner side of the motor front cover; a second cooling gap is arranged in the bearing, a third cooling gap is arranged between the motor front cover and the rotor assembly, a fourth cooling gap is arranged between the rotor assembly and the stator, an oil drainage port is arranged on the motor rear cover, and cooling hydraulic oil enters from a flushing oil port. The cooling hydraulic oil sequentially passes through the brake assembly, the first cooling gap, the second cooling gap, the third cooling gap and the fourth cooling gap and is finally discharged from the oil drainage port, and the cooling hydraulic oil has the advantages that the cooling hydraulic oil can take away heat generated by the brake assembly and heat generated by the stator and the rotor, the temperature of the hydraulic motor is reduced, and therefore the safety of the hydraulic motor is improved; continuous work can be achieved, and work efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic motors, in particular to a hydraulic motor with a brake assembly and good heat dissipation performance. Background Art

[0002] Hydraulic motors are core components in heavy-duty vehicle powertrains, and their performance and reliability are directly related to the overall vehicle's operating efficiency and safety. Continuous advancements in engineering technology are driving higher demands on the braking performance of hydraulic motors, aiming to achieve more precise braking control, improved thermal stability, and lower maintenance costs.

[0003] Traditional hydraulic motor braking systems often utilize a combination of drum brakes and friction disc brakes to achieve dual service and parking brake functions. Due to its structural characteristics, the drum brake is positioned in front of the rotor and stator, providing the necessary braking torque during driving. However, this dry braking method can easily generate significant heat due to friction during prolonged or intense braking. This not only reduces braking efficiency but can also cause sparks, increasing the risk of fire and posing a threat to vehicle and personnel safety. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a hydraulic motor with a brake assembly having good heat dissipation performance. The utility model reduces the working temperature of the hydraulic motor by passing cooling hydraulic oil through the heat-prone parts of the entire hydraulic motor.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a hydraulic motor with a brake assembly with good heat dissipation performance, comprising a stator, a rotor assembly, a motor front cover and a motor rear cover, the rotor assembly being connected to the output shaft, a distribution shaft being provided in the motor rear cover, a brake assembly being provided in the motor front cover, the brake assembly comprising a friction plate assembly, a service brake control device and a parking brake control device, the friction plate assembly comprising a plurality of dynamic friction plates and a plurality of static friction plates, characterized in that the brake assembly is arranged in a brake cavity, the brake cavity is connected to a flushing oil port, a first cooling gap is provided between the motor front cover and the output shaft, a bearing is provided on the inner side of the motor front cover, a second cooling gap is provided in the bearing, a third cooling gap is provided between the motor front cover and the rotor assembly, a fourth cooling gap is provided between the rotor assembly and the stator, and an oil drain port is provided on the motor rear cover, cooling hydraulic oil enters from the flushing oil port, passes through the brake assembly, the first cooling gap, the second cooling gap, the third cooling gap and the fourth cooling gap in sequence, and is finally discharged from the oil drain port.

[0006] A further preselected solution of the present invention is that a fifth cooling gap is provided between the outer end of the brake assembly and the brake cavity, and a sixth cooling gap is provided between the inner end of the brake assembly and the brake cavity.

[0007] A further preselected solution of the present invention is that a plurality of annular grooves and a plurality of radial grooves are distributed on the static friction plate, and the annular grooves and the radial grooves are interconnected.

[0008] A further preselected solution of the present invention is: a first clamping plate, a second clamping plate and a disc spring are provided in the brake assembly, and a seventh cooling gap is provided between the second clamping plate and the disc spring.

[0009] A further preselected solution of the present invention is: the cooling hydraulic oil enters the fifth cooling gap from the flushing oil port, part of the cooling hydraulic oil in the fifth cooling gap enters the first cooling gap through the seventh cooling gap, and part of the cooling hydraulic oil enters the inner end of the radial groove through the outer end of the radial groove and enters the first cooling gap through the sixth cooling gap.

[0010] A further preselected solution of the present invention is that when the cooling hydraulic oil flows through the radial grooves, the annular grooves are also filled with the cooling hydraulic oil simultaneously.

[0011] Compared with existing technologies, the present invention sequentially routes the cooling hydraulic oil through the brake assembly, the first cooling gap, the second cooling gap, the third cooling gap, and the fourth cooling gap, ultimately discharging it from the oil drain port. This removes heat generated by the brake assembly, the stator, and the rotor, lowering the temperature of the hydraulic motor, thereby improving its safety, enabling continuous operation, and enhancing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a cross-sectional view of a hydraulic motor;

[0013] Figure 2 It is a three-dimensional diagram of the dynamic friction plate and the static friction plate;

[0014] Figure 3 for Figure 1 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1-Figure 3The figure shows a hydraulic motor with a brake assembly 7 and excellent heat dissipation performance. The motor includes a stator 1, a rotor assembly 2, a motor front cover 3, and a motor rear cover 4. The rotor assembly 2 is connected to an output shaft 5. A valve distribution shaft 6 is disposed within the motor rear cover 4. The brake assembly 7 is disposed within the motor front cover 3. The brake assembly 7 includes a friction plate assembly, a service brake control device, and a parking brake control device. The brake assembly 7 is used to provide braking force, including service braking and parking braking. Service braking provides braking force while the vehicle is in motion, that is, from a running vehicle to a stopped state; parking braking provides braking force while the vehicle is stopped, that is, the vehicle is continuously stopped.

[0017] The friction plate assembly includes a dynamic friction plate 8 and a static friction plate 9. The dynamic friction plate 8 is fixed to the output shaft 5. Rotation of the output shaft 5 drives the dynamic friction plate 8, while the static friction plate 9 does not rotate. When the dynamic friction plates 8 and the static friction plates 9 press against each other, the static friction plates 9 hinder the rotation of the dynamic friction plate 8, thereby hindering the rotation of the output shaft 5, achieving a braking effect. The brake assembly 7 is disposed in a brake chamber 10. A flushing port 11 is connected to the brake chamber 10. A first cooling gap 13 is provided between the motor front cover 3 and the output shaft 5. A bearing 12 is disposed inside the motor front cover 3. A second cooling gap 14 is provided within the bearing 12. The rotation of the bearing 12 generates heat, which requires cooling hydraulic oil to remove. A third cooling gap 15 is provided between the motor front cover 3 and the rotor assembly 2. A fourth cooling gap 16 is provided between the rotor assembly 2 and the stator 1. Heat is generated between the rotor assembly 2 and the stator 1, which requires cooling hydraulic oil to remove the heat. An oil drain port 17 is provided on the motor rear cover 4. The cooling hydraulic oil enters from the flushing oil port 11, passes through the brake assembly 7, the first cooling gap 13, the second cooling gap 14, the third cooling gap 15, the fourth cooling gap 16 in sequence, and is finally discharged from the oil drain port 17.

[0018] A fifth cooling gap 18 is defined between the outer end of the brake assembly 7 and the brake chamber 10, and a sixth cooling gap 19 is defined between the inner end of the brake assembly 7 and the brake chamber 10. Cooling hydraulic oil is split into two paths to remove heat. The static friction plate 9 is provided with multiple annular grooves 20 and multiple radial grooves 21, which are interconnected. Cooling hydraulic oil flows through these grooves, helping to remove heat from the brake assembly 7. A first clamping plate 22, a second clamping plate 23, and a disc spring 24 are provided within the brake assembly 7. A seventh cooling gap 25 is defined between the second clamping plate 23 and the disc spring 24. Cooling hydraulic oil enters the fifth cooling gap from the flushing port 11. Some of the cooling hydraulic oil in the fifth cooling gap 18 flows through the seventh cooling gap 25 into the first cooling gap 13. Some of the cooling hydraulic oil flows through the outer ends of the radial grooves 21 into the inner ends of the radial grooves 21 and then through the sixth cooling gap 19 into the first cooling gap 13. Within the brake assembly 7, the cooling hydraulic oil is split into two paths to remove heat, improving heat dissipation. When the cooling hydraulic oil flows through the radial groove 21 , the annular groove 20 is also filled with the cooling hydraulic oil, thereby enhancing the heat dissipation effect.

[0019] The above describes in detail a hydraulic motor with a brake assembly and excellent heat dissipation performance provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the present invention and its core concepts. It should be noted that those skilled in the art may, without departing from the principles of the present invention, make various improvements and modifications to the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A hydraulic motor with a brake assembly having good heat dissipation performance, comprising a stator, a rotor assembly, a motor front cover, and a motor rear cover. The rotor assembly is connected to the output shaft, a valve shaft is disposed within the motor rear cover, and a brake assembly is disposed within the motor front cover. The brake assembly comprises a friction plate assembly, a service brake control device, and a parking brake control device. The friction plate assembly comprises a plurality of dynamic friction plates and a plurality of static friction plates. The brake assembly is arranged in the brake cavity, and the brake cavity is connected to a flushing oil port. A first cooling gap is arranged between the motor front cover and the output shaft, a bearing is arranged on the inner side of the motor front cover, a second cooling gap is arranged in the bearing, a third cooling gap is arranged between the motor front cover and the rotor assembly, a fourth cooling gap is arranged between the rotor assembly and the stator, and an oil drain port is arranged on the motor rear cover. The cooling hydraulic oil enters from the flushing oil port, passes through the brake assembly, the first cooling gap, the second cooling gap, the third cooling gap, the fourth cooling gap in turn, and is finally discharged from the oil drain port.

2. A hydraulic motor with a brake assembly having good heat dissipation performance according to claim 1, characterized in that A fifth cooling gap is provided between the outer end of the brake assembly and the brake cavity, and a sixth cooling gap is provided between the inner end of the brake assembly and the brake cavity.

3. A hydraulic motor with a brake assembly having good heat dissipation performance according to claim 2, characterized in that A plurality of annular grooves and a plurality of radial grooves are distributed on the static friction plate, and the annular grooves and the radial grooves are communicated with each other.

4. A hydraulic motor with a brake assembly having good heat dissipation performance according to claim 3, characterized in that The brake assembly is provided with a first clamping plate, a second clamping plate and a disc spring, and a seventh cooling gap is provided between the second clamping plate and the disc spring.

5. A hydraulic motor with a brake assembly having good heat dissipation performance according to claim 4, characterized in that The cooling hydraulic oil enters the fifth cooling gap from the flushing oil port, part of the cooling hydraulic oil in the fifth cooling gap enters the first cooling gap through the seventh cooling gap, and part of the cooling hydraulic oil enters the inner end of the radial groove through the outer end of the radial groove and enters the first cooling gap through the sixth cooling gap.

6. A hydraulic motor with a brake assembly having good heat dissipation performance according to claim 5, characterized in that When the cooling hydraulic oil flows through the radial grooves, the cooling hydraulic oil is also filled into the annular grooves simultaneously.

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