Hydraulic motor with front brake module and engineering vehicle

Abstract

The hydraulic motor comprises a motor front cover, a motor rear cover, a stator and a rotor assembly connected with a rotating shaft, a variable-speed valve element assembly is transversely arranged in the center of a flow distribution shaft, and the variable-speed valve element assembly comprises a variable-speed valve element moving channel, a variable-speed valve element and a hydraulic controller. A first adjusting groove, a second adjusting groove, a third adjusting groove and a fourth adjusting groove are formed in the inner wall of the speed change valve element moving channel, and a first groove and a second groove are distributed in the speed change valve element; when the motor rotates at a low speed, the speed change valve element is moved to enable the first groove to communicate with the first adjusting groove and the second adjusting groove, and the second groove communicates with the third adjusting groove and the fourth adjusting groove. When the motor rotates at a high speed, the speed change valve element is moved to enable the first groove to be communicated with the first adjusting groove and the second groove to be communicated with the second adjusting groove and the third adjusting groove, and the hydraulic motor has the advantages that an invalid structure in the center position in the flow distribution shaft is fully utilized, so that the size of the hydraulic motor is reduced.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a hydraulic motor with a front brake module and an engineering vehicle. Background Art

[0002] As an efficient and stable power conversion device, hydraulic motor plays a vital role in the fields of industry, agriculture, aerospace, etc. Its basic principle is to convert the pressure energy of the liquid into mechanical energy, thereby driving the rotor to rotate and realize power output. With the continuous development of modern technology, the design of hydraulic motors is also constantly optimized to meet more complex and diverse application requirements.

[0003] In the design of hydraulic motors, the braking function is an important consideration. In order to ensure that the equipment can brake quickly and stably when it stops and prevent accidental damage caused by inertia, a braking module is usually added to the front side of the motor front cover or the rear side of the motor rear cover. This design method effectively improves the safety and reliability of hydraulic motors.

[0004] However, in the design of hydraulic motors with brake modules placed in front, in order to control the supply of hydraulic oil to adjust the speed of the motor, the traditional design method is to set a speed change valve core inside the motor rear cover. Although this method can control the motor speed, it also brings some problems. The speed change valve core occupies a large space in the motor rear cover, making the motor rear cover bulky, which in turn leads to an increase in the volume of the entire hydraulic motor. This not only increases the manufacturing cost, but also limits the installation and application of hydraulic motors in small spaces.

[0005] In addition, with the development of modern manufacturing, the miniaturization and lightweight of equipment has become a trend. For hydraulic motors, reducing their size and weight is not only conducive to reducing costs, but also can improve the flexibility and portability of equipment, making it more adaptable to various complex working environments. Therefore, how to optimize the design of hydraulic motors and reduce their size and weight has become an important direction for the development of current hydraulic motor technology.

[0006] In view of the above problems, the present application proposes a novel hydraulic motor design scheme with a front brake module, which reduces the space occupied by the variable speed valve core by optimizing its layout and structural design, thereby reducing the volume of the motor rear cover and the entire hydraulic motor. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a hydraulic motor and an engineering vehicle with a brake module in front. The utility model transforms the hydraulic motor with a brake module in front, moves the speed change valve core in the motor rear cover to the distribution shaft, and makes full use of the invalid structure in the central position of the distribution shaft, thereby reducing the volume of the hydraulic motor.

[0008] The technical solution adopted by the utility model to solve the above technical problems is: a hydraulic motor with a brake module in front, comprising a motor front cover, a motor rear cover, a stator and a rotor assembly connected to a rotating shaft, a brake module is arranged on the front side of the motor front cover, the rotating shaft passes through the motor front cover and is connected to the brake module, a distribution shaft is arranged in the motor rear cover, a speed change valve core assembly is arranged in the distribution shaft, the speed change valve core assembly comprises a speed change valve core moving channel, a speed change valve core and a hydraulic controller, a first regulating groove, a second regulating groove, a third regulating groove and a fourth regulating groove are arranged on the inner wall of the speed change valve core moving channel, wherein the first regulating groove is connected to the oil inlet, the fourth regulating groove is connected to the oil outlet, and the speed change valve core is distributed with a first groove and a second groove; when the motor rotates at a low speed, the speed change valve core is moved so that the first groove is connected to the first regulating groove and the second regulating groove, and the second groove is connected to the third regulating groove and the fourth regulating groove; when the motor rotates at a high speed, the speed change valve core is moved so that the first groove is connected to the first regulating groove, and the second groove is connected to the second regulating groove and the third regulating groove.

[0009] A further preferred solution of the utility model is: an oil replenishing valve core is arranged in the speed change valve core, the oil replenishing valve core comprises a speed change spring seat, a spring and a valve core, the spring is sleeved on the outside of the spring seat, an oil replenishing groove is arranged in the second groove, and a connecting channel is arranged in the valve core.

[0010] A further preferred scheme of the utility model is: a hydraulic cavity is arranged on the right side of the speed change valve core, a low-pressure hydraulic area is arranged on the left side of the speed change valve core moving channel, a return spring is arranged between the right end of the hydraulic valve core and the inner wall of the speed change valve core moving channel, and after the high-pressure hydraulic oil is rushed into the hydraulic cavity, the liquid pressure generated by the hydraulic oil overcomes the thrust of the return spring and pushes the speed change valve core to move to the left; after the high-pressure hydraulic oil stops rushing into the hydraulic cavity, the return spring pushes the speed change valve core to move to the right and reset.

[0011] A further preferred solution of the utility model is: a limiting protrusion is provided at the end of the speed change valve core, a return spring rests on the limiting protrusion, a limiting step is provided on the inner wall of the speed change valve core moving channel, and after the speed change valve core moves, the limiting step blocks the movement of the limiting protrusion.

[0012] A further preferred solution of the utility model is that the first adjusting groove, the second adjusting groove, the third adjusting groove and the fourth adjusting groove are stepped grooves.

[0013] A further preferred solution of the utility model is: a sealing cover is arranged on the outer side of the hydraulic cavity, a sealing ring is arranged around the outer circumference of the sealing cover, and a limiting ring is arranged on the outer end of the sealing cover.

[0014] The utility model sets a speed change valve core assembly in the distribution shaft, and the speed change valve core assembly is transversely arranged at the central position of the distribution shaft. The speed change valve core assembly includes a speed change valve core moving channel, a speed change valve core and a hydraulic controller. The hydraulic controller moves back and forth in the speed change valve core moving channel by controlling the speed change valve core, and controls the low-speed operation or high-speed operation of the hydraulic motor by the positional relationship between the two grooves and the four adjustment grooves on the speed change valve core. Compared with the existing design, the utility model makes full use of the invalid structure at the central position of the distribution shaft, moves the speed change valve core assembly originally set on the motor rear cover to the center of the distribution shaft, and can greatly reduce the volume of the motor rear cover, thereby reducing the volume of the entire motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the hydraulic motor when it rotates at a low speed;

[0016] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0017] Figure 3 It is a structural schematic diagram of the hydraulic motor when it rotates at high speed;

[0018] Figure 4 for Figure 3 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] like Figure 1-Figure 4As shown, a hydraulic motor with a brake module 6 in front includes a motor front cover 1, a motor rear cover 2, a stator 3 and a rotor assembly 5 connected to a rotating shaft 4. The front side of the motor front cover 1 is provided with a brake module 6, and the rotating shaft 4 passes through the motor front cover 1 and is connected to the brake module 6. A distribution shaft 7 is provided in the motor rear cover 2. The distribution shaft 7 of a conventional hydraulic motor often adopts a hollow structure or passes through the rotating shaft 4, and these structures have no practical use. The utility model is provided with a speed change valve core assembly transversely at the central position of the distribution shaft 7, and the speed change valve core assembly includes a speed change valve core moving channel 8, a speed change valve core 9 and a hydraulic controller 10. The inner wall of the moving channel 8 of the speed change valve core 9 is provided with a first regulating groove 11, a second regulating groove 12, a third regulating groove 13 and a fourth regulating groove 14, and each regulating groove is connected to three oil circuits. The first regulating groove 11 is connected to the oil inlet, and the fourth regulating groove 14 is connected to the oil outlet (the motor can rotate forward and reverse, so the first regulating groove can also be connected to the oil outlet, and the fourth regulating groove can also be connected to the oil inlet), and the first groove 15 and the second groove 16 are distributed on the speed change valve core 9; when the motor rotates at a low speed, the speed change valve core 9 is moved to make the first groove 15 connect to the first regulating groove 11 and the second regulating groove 12, and the second groove 16 connect to the third regulating groove 13 and the fourth regulating groove 14. At this time, the first regulating groove 11 and the second regulating groove 12 of the motor are both hydraulic oil inlet channels, and the third regulating groove 13 and the fourth regulating groove 14 are hydraulic oil outlet channels, that is, six in and six out; when the motor rotates at a high speed, the speed change valve core 9 is moved to make the first groove 15 connect to the first regulating groove 11, and the second groove 16 connect to the second regulating groove 12 and the third regulating groove 13. At this time, the first regulating groove 11 and the fourth regulating groove 14 are independent of each other, and the second regulating groove 12 and the third regulating groove 13 do not participate in the entry or discharge of hydraulic oil, that is, three in and three out.

[0021] An oil replenishing valve core is arranged in the speed change valve core 9, and the oil replenishing valve core includes a speed change spring seat 18, a spring 19 and a valve core 20. The spring 19 is sleeved on the outside of the spring seat 18, an oil replenishing groove 17 is arranged in the second groove 16, and a connecting channel 21 is arranged in the valve core 20. The speed change valve core 9 is used to replenish oil inside the speed change valve core 9 when the speed change valve core 9 moves, so as to avoid the pressure difference in the speed change valve core 9 affecting the operation. A hydraulic cavity 22 is arranged on the right side of the speed change valve core 9, a low-pressure hydraulic area 23 is arranged on the left side of the moving channel 8 of the speed change valve core 9, and a return spring 24 is arranged between the right end of the hydraulic valve core and the inner wall of the moving channel 8 of the speed change valve core 9. After the hydraulic cavity 22 is charged with high-pressure hydraulic oil, the hydraulic pressure generated by the hydraulic oil overcomes the thrust of the return spring 24 and pushes the speed change valve core 9 to move to the left; after the hydraulic cavity 22 stops charging with high-pressure hydraulic oil, the return spring 24 pushes the speed change valve core 9 to move to the right and reset. A limiting protrusion 25 is provided at the end of the speed change valve core 9, and the return spring 24 abuts against the limiting protrusion 25. A limiting step 26 is provided on the inner wall of the moving channel 8 of the speed change valve core 9. After the speed change valve core 9 moves, the limiting step 26 blocks the movement of the limiting protrusion 25. It is used to protect the speed change valve core 9 and limit the movement of the speed change valve core 9 within a certain range to avoid collision caused by excessive movement. The first regulating groove 11, the second regulating groove 12, the third regulating groove 13 and the fourth regulating groove 14 adopt stepped grooves, which cooperate with the first groove 15 and the second groove 16 to quickly realize speed switching. A cover 27 is provided on the outside of the hydraulic cavity 22, and a sealing ring 28 surrounds the outer periphery of the cover 27. A limiting ring 29 is provided on the outer end of the cover 27 to firmly fix the cover 27 on the outside of the hydraulic cavity. At the same time, the sealing ring seals the cover 27 to avoid leakage of hydraulic oil to the outside.

[0022] An engineering vehicle comprises a hydraulic motor with a brake module in front. The hydraulic motor with the above structure can reduce the size of the motor, making the application range of the motor wider.

[0023] The above is a detailed introduction to the hydraulic motor and engineering vehicle with a front brake module provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A hydraulic motor with a front brake module, comprising a motor front cover, a motor rear cover, a stator and a rotor assembly connected to a rotating shaft, a brake module is arranged on the front side of the motor front cover, the rotating shaft passes through the motor front cover and is connected to the brake module, and a distribution shaft is arranged in the motor rear cover, characterized in that A speed change valve core assembly is laterally arranged at the central position of the distribution shaft, and the speed change valve core assembly includes a speed change valve core moving channel, a speed change valve core and a hydraulic controller, and a first regulating groove, a second regulating groove, a third regulating groove and a fourth regulating groove are arranged on the inner wall of the speed change valve core moving channel, wherein the first regulating groove is connected to the oil inlet, the fourth regulating groove is connected to the oil outlet, and a first groove and a second groove are distributed on the speed change valve core; when the motor rotates at a low speed, the speed change valve core is moved so that the first groove is connected to the first regulating groove and the second regulating groove, and the second groove is connected to the third regulating groove and the fourth regulating groove; when the motor rotates at a high speed, the speed change valve core is moved so that the first groove is connected to the first regulating groove, and the second groove is connected to the second regulating groove and the third regulating groove.

2. A hydraulic motor in front of a brake module according to claim 1, characterized in that The speed change valve core is provided with an oil replenishing valve core, which includes a speed change spring seat, a spring and a valve core. The spring is sleeved on the outside of the spring seat, an oil replenishing groove is provided in the second groove, and a connecting channel is provided in the valve core.

3. A hydraulic motor in front of a brake module according to claim 1, characterized in that A hydraulic cavity is provided on the right side of the speed change valve core, a low-pressure hydraulic area is provided on the left side of the speed change valve core moving channel, and a return spring is provided between the right end of the hydraulic valve core and the inner wall of the speed change valve core moving channel. After the high-pressure hydraulic oil is rushed into the hydraulic cavity, the liquid pressure generated by the hydraulic oil overcomes the thrust of the return spring and pushes the speed change valve core to move to the left; after the high-pressure hydraulic oil stops rushing into the hydraulic cavity, the return spring pushes the speed change valve core to move to the right and reset.

4. A hydraulic motor in front of a brake module according to claim 3, characterized in that The end of the speed change valve core is provided with a limit protrusion, the return spring abuts against the limit protrusion, and the inner wall of the speed change valve core moving channel is provided with a limit step. After the speed change valve core moves, the limit step blocks the limit protrusion from moving.

5. A hydraulic motor in front of a brake module according to claim 1, characterized in that The first adjusting groove, the second adjusting groove, the third adjusting groove and the fourth adjusting groove are stepped grooves.

6. A hydraulic motor in front of a brake module according to claim 3, characterized in that A sealing cover is arranged on the outer side of the hydraulic cavity, a sealing ring is arranged around the outer circumference of the sealing cover, and a limiting ring is arranged on the outer end of the sealing cover.

7. An engineering vehicle, characterized in that It comprises a hydraulic motor in front of a brake module as described in any one of claims 1-6.

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