Cycloidal hydraulic motor with braking function and braking method therefor

Abstract

A cycloidal hydraulic motor with a braking function and a braking method therefor, the cycloidal hydraulic motor with a braking function comprising a rotor-stator pair (1), an output shaft (2), a connecting housing (4), an elastic member (5) and a piston (6), wherein the rotor-stator pair (1) comprises a rotor (101) and a stator (102); the output shaft (2) is connected to the rotor (101) by means of a linkage shaft (3); the connecting housing (4) is located on the left side of the stator (102), the connecting housing (4) is sleeved on the linkage shaft (3); the elastic member (5) and the piston (6) are both mounted in the connecting housing (4); and the left side and the right side of the elastic member (5) abut against the right side surface of the connecting housing (4) and the left side surface of the piston (6), respectively.

Description

Cycloid hydraulic motor with braking function and braking method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on and claims the priority of Chinese patent application with application number 202311542439.2 and application date of November 17, 2023. The entire content of the Chinese patent application is hereby incorporated into this disclosure as a reference. Technical Field

[0003] The present disclosure relates to the technical field of hydraulic motors, and in particular to a cycloid hydraulic motor with a braking function and a braking method thereof. Background Art

[0004] The cycloid hydraulic motor is an internal meshing cycloid gear type hydraulic motor with the advantages of simple structure, good low-speed performance, and strong short-term overload capacity. The cycloid hydraulic motor needs to be equipped with a brake when in use. There are two main types of existing cycloid hydraulic motors: cycloid hydraulic motors without brakes and cycloid hydraulic motors with brakes. The braking torque of the cycloid hydraulic motor without brakes is small and cannot meet the requirements of some uses that require braking torque. The existing cycloid hydraulic motor with a brake has a braking method: a force is applied to the linkage shaft or the output shaft through a friction pair to achieve braking. Although this structure can provide a larger braking torque, the addition of friction in the cycloid hydraulic motor will cause the radial size of the cycloid hydraulic motor to become larger, resulting in an increase in the volume of the entire cycloid hydraulic motor, which is not convenient for installation on equipment with a small installation space.

[0005] Summary of the Invention

[0006] The technical problem to be solved by the present disclosure is: in order to solve the technical problem that the existing cycloid hydraulic motor with brake is large in size and inconvenient to install, the present disclosure provides a cycloid hydraulic motor with braking function and a braking method thereof. By adjusting the braking mode of the cycloid hydraulic motor, the size of the cycloid hydraulic motor can be reduced, making it convenient to install and use on equipment with a small installation space.

[0007] The technical solution adopted by the present disclosure to solve its technical problems is: a cycloid hydraulic motor with braking function and a braking method thereof, comprising: a rotor-stator pair, an output shaft, a connecting shell, an elastic member and a piston, the rotor-stator pair comprising: a rotor and a stator, the rotor being located in the stator, the output shaft being connected to the rotor via a linkage shaft, the connecting shell being located on the left side of the stator, and the connecting shell being sleeved on the linkage shaft, the elastic member and the piston being both installed in the connecting shell, the left and right sides of the elastic member respectively abutting against the right side surface of the connecting shell and the left side surface of the piston; when the motor is in working state, the piston can move to the left to press the elastic member; when the motor is braking, the elastic member can push the piston to the right to prevent the rotation of the rotor.

[0008] Therefore, when the motor brakes, the elastic member and the piston cooperate with each other to apply force to the rotor, preventing the rotor from rotating, thereby achieving motor braking. Compared with the braking method of applying force to the linkage shaft or output shaft through the friction pair, this braking method omits the friction pair, can reduce the radial size of the motor, and is convenient for installation on equipment with narrow installation space. At the same time, this braking method acts directly on the rotor and can provide greater braking force.

[0009] Furthermore, it also includes: a shell, a connecting plate, a balancing plate, a distribution plate and a rear cover are arranged in sequence from left to right, the connecting shell is located between the shell and the connecting plate, and the stator is located between the balancing plate and the distribution plate.

[0010] Furthermore, the left side of the rotor abuts against the right side of the balancing disk, and a first annular groove is formed on the left side of the rotor.

[0011] Furthermore, the piston includes: a first piston part and a second piston part, the second piston part is sleeved on the first piston part, the right side of the first piston part is located in the connecting plate, the left side of the second piston part abuts against the right side of the elastic member, and the right side of the second piston part is provided with a second annular groove;

[0012] When the motor brakes, the right side surface of the first piston portion abuts against the left end surface of the balancing disk.

[0013] Furthermore, a plurality of first mounting grooves and second mounting grooves are provided in the connecting shell, and the first mounting groove and the second mounting groove are separated by a partition, the elastic member and the second piston part are both located in the first mounting groove, and the left side of the elastic member abuts against the right side of the first mounting groove, the first mounting groove is connected to the second annular groove, and the left side of the first piston part is located in the second mounting groove.

[0014] Furthermore, the second mounting groove has a first side wall, a second side wall and a third side wall, the outer peripheral wall on the left side of the first piston part abuts against the first side wall, and there is a gap between the inner peripheral wall of the first piston part and the second side wall.

[0015] Furthermore, when the motor is in operation, there is a gap between the left side surface of the first piston portion and the third side wall.

[0016] Furthermore, a plurality of grooves are formed on the right side of the first piston portion, and the plurality of grooves are distributed in a ring shape with equal intervals.

[0017] Furthermore, a third annular groove is opened on the right side of the connecting plate, the first annular groove and the second annular groove are both connected to the third annular groove, and the second mounting groove is connected to the third annular groove through the groove.

[0018] Furthermore, the connecting plate is provided with an oil inlet channel, an inlet end of the oil inlet channel is located on the outer peripheral surface of the connecting plate, and an outlet end of the oil inlet channel is communicated with the second annular groove.

[0019] Furthermore, a third through hole is formed on the connecting shell, and the first mounting groove is connected to the interior of the shell through the third through hole.

[0020] Furthermore, the rear cover is provided with an oil inlet and an oil replenishing port, the oil inlet is communicated with the first annular groove, and the oil replenishing port is communicated with the interior of the housing through a flow channel.

[0021] The present disclosure also provides a braking method for a cycloid hydraulic motor with a braking function, comprising the following steps:

[0022] S1. The motor starts, and the hydraulic oil pushes the piston to the left. When the piston moves to the left, the elastic member is compressed. At this time, the rotor can rotate and can drive the output shaft to rotate through the linkage shaft;

[0023] S2. When the hydraulic oil stops flowing, the elastic force of the elastic member pushes the piston to the right. At this time, the pressing force on the rotor increases, and the rotor stops rotating, so that the output shaft cannot rotate, thereby achieving braking of the output shaft.

[0024] Furthermore, when the motor is started, the hydraulic oil flows from the oil inlet into the rotor and the second annular groove in sequence, pushing the piston to move leftward and realizing the rotation of the output shaft.

[0025] Furthermore, before the motor is started, hydraulic oil flows from the oil inlet channel into the second annular groove, pushing the piston to move leftward to release the brake on the rotor in advance;

[0026] After the motor is started, the hydraulic oil flows into the rotor from the oil inlet, which can quickly realize the rotation of the output shaft.

[0027] Compared with the related art, the present invention has the following advantages:

[0028] When the motor brakes, the elastic member and the piston cooperate with each other to apply force to the rotor, preventing the rotor from rotating, thereby achieving motor braking. Compared with the braking method of applying force to the linkage shaft or output shaft through the friction pair, this braking method omits the friction pair, can reduce the radial size of the motor, and is convenient for installation and use on equipment with narrow installation space. At the same time, this braking method acts directly on the rotor and can provide greater braking force. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present disclosure is further described below with reference to the accompanying drawings and embodiments.

[0030] FIG1 is a schematic structural diagram of a cycloid hydraulic motor with a braking function in working state according to Example 1;

[0031] FIG2 is a schematic structural diagram of an elastic member and a piston of a cycloid hydraulic motor with a braking function in a working state according to Example 1;

[0032] FIG3 is a schematic structural diagram of the rotor-stator pair disclosed in the present invention;

[0033] FIG4 is a schematic structural diagram of a connection housing disclosed herein;

[0034] FIG5 is a schematic structural diagram of a piston disclosed herein;

[0035] FIG6 is a schematic structural diagram of the connecting plate of Example 1

[0036] FIG7 is a schematic structural diagram of a balancing disk disclosed herein;

[0037] FIG8 is a schematic structural diagram of the rear cover of the present invention;

[0038] FIG9 is a schematic structural diagram of a cycloid hydraulic motor with a braking function in a braking state according to Example 1;

[0039] FIG10 is a schematic structural diagram of an elastic member and a piston in a braking state of a cycloid hydraulic motor with a braking function according to Example 1;

[0040] FIG11 is a schematic structural diagram of the elastic member and the piston of the cycloid hydraulic motor with a braking function in the working state of Example 2.

[0041] In the figure: 1. rotor-stator pair; 101. rotor; 1011. first annular groove; 1012. oil passage; 102. stator; 1021. seventh through hole; 2. output shaft; 3. linkage shaft; 4. connecting housing; 401. partition; 402. first mounting groove; 403. second mounting groove; 4031. first side wall; 4032. second side wall; 4033. third side wall; 404. third through hole; 405. fourth through hole; 406. fourth side wall; 5. elastic member; 6. piston; 601. first piston portion; 6011. groove; 607. 012, first sealing ring; 6013, second sealing ring; 602, second piston part; 6021, second annular groove; 6022, second through hole; 7, housing; 701, oil outlet channel; 8, connecting plate; 801, third annular groove; 802, oil inlet channel; 803, damping hole; 804, fifth through hole; 9, balancing plate; 901, first through hole; 902, sixth through hole; 10, distribution plate; 11, rear cover; 12, oil inlet; 13, oil replenishment port; 14, bearing; 15, eighth through hole; 16, third sealing ring; 17, retaining ring. DETAILED DESCRIPTION

[0042] The present disclosure will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present disclosure in a schematic manner.

[0043] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise specified, "multiple" means two or more.

[0044] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0045] Example 1:

[0046] As shown in Figures 1 to 10, a cycloid hydraulic motor with a braking function includes: a rotor-stator pair 1, an output shaft 2, a connecting shell 4, an elastic member 5 and a piston 6. The rotor-stator pair 1 includes: a rotor 101 and a stator 102. The rotor 101 is located in the stator 102. The output shaft 2 is connected to the rotor 101 through a linkage shaft 3. The connecting shell 4 is located on the left side of the stator 102, and the connecting shell 4 is sleeved on the linkage shaft 3. The elastic member 5 and the piston 6 are both installed in the connecting shell 4. The left and right sides of the elastic member 5 are respectively in contact with the right side surface of the connecting shell 4 and the left side surface of the piston 6; when the motor is in working state, the piston 6 can move to the left to press the elastic member 5; when the motor is braked, the elastic member 5 can push the piston 6 to move to the right to prevent the rotor 101 from rotating. Therefore, when the motor brakes, the elastic member 5 and the piston 6 cooperate with each other to apply a force to the rotor 101 to prevent the rotation of the rotor 101, thereby achieving the braking of the motor. Compared with the braking method of applying a force to the linkage shaft 3 or the output shaft 2 through the friction pair, this braking method omits the friction pair (the diameter of the friction pair is generally larger), can reduce the radial size of the motor, and is convenient for installation on equipment with a narrow installation space. At the same time, this braking method acts directly on the rotor 101, can provide greater braking force, and further improve the braking effect.

[0047] When the motor is working, the movement state of the rotor 101 in the stator 102 is rotation and swing. When the motor brakes, the elastic member 5 and the piston 6 apply a force to the rotor 101, and the rotor 101 is subjected to the pressing force of the piston 6 to achieve braking. At this time, if the rotor 101 wants to overcome the pressing force and rotate, it needs to overcome both the rotation and swinging friction forces at the same time. Therefore, by braking the rotor 101, a greater braking force can be provided.

[0048] In this embodiment, the elastic member 5 is a spring.

[0049] In this embodiment, the motor further comprises: a housing 7, a connecting plate 8, a balancing disc 9, a distribution disc 10, and a rear cover 11, arranged in sequence from left to right. The connecting housing 4 is located between the housing 7 and the connecting plate 8, the stator 102 is located between the balancing disc 9 and the distribution disc 10, the left side of the rotor 101 abuts against the right side of the balancing disc 9, and the left side of the rotor 101 is provided with a first annular groove 1011. Thus, the elastic member 5 and the piston 6 cooperate to apply a force to the balancing disc 9, thereby generating friction between the balancing disc 9 and the rotor 101, thereby preventing the rotor 101 from rotating, thereby generating a braking torque to achieve motor braking.

[0050] In this embodiment, the piston 6 includes: a first piston portion 601 and a second piston portion 602, the second piston portion 602 is sleeved on the first piston portion 601, the right side of the first piston portion 601 is located in the connecting plate 8, the left side of the second piston portion 602 abuts against the right side of the elastic member 5, and the right side of the second piston portion 602 is provided with a second annular groove 6021. When the motor brakes, the right side of the first piston portion 601 abuts against the left end face of the balancing disk 9. A plurality of first mounting grooves 402 and second mounting grooves 403 are provided in the connecting housing 4, and the first mounting grooves 402 and the second mounting grooves 403 are provided between them. Separated by the partition 401, the elastic member 5 and the second piston portion 602 are both located in the first mounting groove 402, and the left side of the elastic member 5 abuts against the right side of the first mounting groove 402, the first mounting groove 402 is connected to the second annular groove 6021, the left side of the first piston portion 601 is located in the second mounting groove 403, the second mounting groove 403 has a first side wall 4031, a second side wall 4032 and a third side wall 4033, the outer peripheral wall of the left side of the first piston portion 601 abuts against the first side wall 4031, and there is a gap between the inner peripheral wall of the first piston portion 601 and the second side wall 4032.

[0051] When the motor is in working state, there is a gap between the left side of the first piston part 601 and the third side wall 4033, and a plurality of grooves 6011 are provided on the right side of the first piston part 601. The plurality of grooves 6011 are distributed in an annular shape with equal intervals, and a third annular groove 801 is provided on the right side of the connecting plate 8. The first annular groove 1011 and the second annular groove 6021 are both connected to the third annular groove 801, and the second mounting groove 403 and the third annular groove 801 are connected through the groove 6011. Thus, the presence of a gap (e.g., gap A) between the left side of the first piston portion 601 and the third side wall 4033 ensures that the left side of the first piston portion 601 does not contact the third side wall 4033. When the motor is operating, the first annular groove 1011 is filled with high-pressure oil, which enters the third annular groove 801 through the balancing plate 9, generating pressure on the right side of the piston 6. If gap A were not present, the pressure at both ends of the first piston portion 601 would be unbalanced, affecting motor operation. Since gap A always exists, high-pressure oil will also exist in gap A, thereby balancing the pressure at both ends of the first piston portion 601. In addition, the design of the groove 6011 can reduce the contact area between the first piston portion 601 and the balancing plate 9, preventing the left side of the first piston portion 601 from being unable to separate from the third side wall 4033 due to close contact, thereby affecting the braking effect of the motor, and preventing the piston 6 from being tightly contacted with the balancing plate 9, which would cause deformation of the balancing plate 9. In addition, the gap between the inner peripheral arm of the first piston part 601 and the second side wall 4032 can ensure that the hydraulic oil can flow between the second annular groove 6021 and the second mounting groove 403, and the hydraulic oil can enter the gap A to balance the pressure on the left and right sides of the first piston part 601.

[0052] In this embodiment, the width of the second piston portion 602 is D1, the distance between the right side of the partition 401 and the connecting plate 8 is D2, and when the motor is braking, the distance between the left side of the first piston portion 601 and the third sidewall 4033 is D3. Here, D1 < D2, D2 - D1 = 1 mm, and D2 - D1 < D3. This ensures that there is always a gap between the left side of the first piston portion 601 and the third sidewall 4033 when the motor is operating.

[0053] In other words, when the piston 6 abuts the balancing disc 9, due to the presence of the groove 6011, the abutment between the piston 6 and the balancing disc 9 is not a complete annular surface, but is composed of segmented arc-shaped contact surfaces. In this way, the first piston part 601 and the balancing disc 9 can be prevented from sticking to each other.

[0054] Specifically, a first sealing ring 6012 is disposed between the left outer wall of the first piston portion 601 and the first sidewall 4031. A second sealing ring 6013 is disposed between the right outer wall of the first piston portion 601 and the connecting plate 8. A third sealing ring 16 and a retaining ring 17 are disposed, from left to right, between the fourth sidewall 406 of the connecting housing 4 and the balancing disc 9. Thus, the provision of the first sealing ring 6012, the second sealing ring 6013, and the third sealing ring 16 ensures that hydraulic oil entering the second mounting groove 403 does not flow into the first mounting groove 402. This not only balances the pressure on the left and right sides of the first piston portion 601, but also prevents the motor's braking effect from being affected by the communication between the second mounting groove 403 and the first mounting groove 402.

[0055] In this embodiment, the gap between the inner wall of the first piston portion 601 and the second side wall 4032 is very small, and therefore, has almost no impact on the radial dimension of the motor.

[0056] In this embodiment, a third through hole 404 is further defined in the connecting housing 4, through which the first mounting groove 402 communicates with the interior of the housing 7. The rear cover 11 defines an oil inlet 12 and an oil replenishment port 13. The oil inlet 12 communicates with the first annular groove 1011, and the oil replenishment port 13 communicates with the interior of the housing 7 via a flow channel. Specifically, the output shaft 2 is mounted on the housing 7 via a bearing 14, and the low-pressure oil within the motor returns to the oil replenishment port 13 via the flow channel, eliminating the need for an additional oil drain port. Furthermore, connecting the oil replenishment port 13 prevents internal pressure buildup in the motor and reduces the pressure on the shaft seal (located between the two bearings 14).

[0057] Specifically, when the motor brakes, the elastic member 5 always applies a rightward force to the piston 6, so that the piston 6 always presses the balancing disc 9, causing the balancing disc 9 to produce elastic deformation and always press the rotor 101. The friction between the balancing disc 9 and the rotor 101 prevents the rotation of the rotor 101, thereby generating a braking force; when the motor is working, hydraulic oil is supplied to the second annular groove 6021, and the piston 6 moves to the left under the action of the hydraulic oil. The piston 6 no longer squeezes the balancing disc 9, and the balancing disc 9 restores its elastic deformation. The balancing disc 9 no longer presses the rotor 101, the friction between the balancing disc 9 and the rotor 101 disappears, and the braking force is released.

[0058] Specifically, the rotor 101 is provided with an oil passage 1012 to achieve communication between the oil inlet 12 and the first annular groove 1011; the balancing plate 9 is provided with a first through hole 901 to achieve communication between the first annular groove 1011 and the third annular groove 801; the connecting plate 8 is provided with a damping hole 803 to achieve communication between the third annular groove 801 and the second annular groove 6021; the second piston portion 602 is provided with a second through hole 6022 to achieve communication between the second annular groove 6021 Communication with the first mounting groove 402; an oil outlet channel 701 is provided on the shell 7, a fourth through hole 405 is provided on the connecting shell 4, a fifth through hole 804 is provided on the connecting plate 8, a sixth through hole 902 is provided on the balancing plate 9, a seventh through hole 1021 is provided on the stator 102, and an eighth through hole 15 is provided on the distribution plate 10. The oil outlet channel 701, the fourth through hole 405, the fifth through hole 804, the sixth through hole 902, the seventh through hole 1021 and the eighth through hole 15 together constitute a flow channel.

[0059] Specifically, the high-pressure oil in the second annular groove 6021 enters the interior of the housing 7 through the second through hole 6022 and the third through hole 404 to flush the interior of the motor.

[0060] This embodiment also provides a braking method for a cycloid hydraulic motor with a braking function, comprising the following steps:

[0061] S1. The motor starts, and the hydraulic oil pushes the piston 6 to move leftward. When the piston 6 moves leftward, the elastic member 5 is compressed. At this time, the rotor 101 can rotate and can drive the output shaft 2 to rotate through the linkage shaft 3;

[0062] S2. When the hydraulic oil is stopped, the elastic force of the elastic member 5 pushes the piston 6 to the right. At this time, the pressing force on the rotor 101 increases, and the rotor 101 stops rotating, making the output shaft 2 unable to rotate, thereby achieving braking of the output shaft 2.

[0063] In this embodiment, when the motor is started, the hydraulic oil flows from the oil inlet 12 into the rotor 101 and the second annular groove 6021 in sequence, pushing the piston 6 to move leftward and realizing the rotation of the output shaft 2.

[0064] Example 2:

[0065] As shown in Figure 11, the difference from Example 1 is that the connecting plate 8 is provided with an oil inlet channel 802, the inlet end of the oil inlet channel 802 is located on the outer peripheral surface of the connecting plate 8, and the outlet end of the oil inlet channel 802 is connected to the second annular groove 6021; before the motor is started, the hydraulic oil flows from the oil inlet channel 802 into the second annular groove 6021, pushing the piston 6 to move to the left, so as to release the brake on the rotor 101 in advance; after the motor is started, the hydraulic oil flows from the oil inlet port 12 into the rotor 101, which can quickly realize the rotation of the output shaft 2.

[0066] In other words, the brake on the rotor 101 can be released in advance through the oil inlet channel 802, and the output shaft 2 can be immediately rotated after the high-pressure oil is introduced into the motor, which is beneficial to improving the working efficiency of the motor.

[0067] When the motor needs to be braked, the oil supply to the oil inlet 12 is stopped first to stop the motor. When the motor stops working completely, the oil supply to the oil inlet channel 802 is stopped to achieve delayed braking of the motor (that is, the braking start time is later than the stop time of the rotor 101). In this way, the entire motor can be protected. This braking method has better stability and does not require sacrificing the volume of the motor, thereby improving the working efficiency of the motor.

[0068] When the motor is switched from the working state to the braking state, the high-pressure oil in the second annular groove 6021 enters the interior of the housing 7 through the second through hole 6022 and the third through hole 404, realizing the function of delayed braking, which can prevent the rotor 101 from being damaged. At the same time, it can also relieve the pressure inside the housing 7 to prevent the high-pressure oil from being trapped in the second annular groove 6021, thereby extending the service life of the motor.

[0069] To sum up, when the motor is braked, the present invention applies a force to the rotor 101 through the mutual cooperation of the elastic member 5 and the piston 6 to prevent the rotation of the rotor 101, thereby achieving braking of the motor. Compared with the braking method of applying a force to the linkage shaft 3 or the output shaft 2 through the friction pair, this braking method omits the friction pair, can reduce the radial size of the motor, and is convenient for installation on equipment with a small installation space. At the same time, this braking method acts directly on the rotor 101, and can provide greater braking force.

[0070] The above description is intended to serve as a guide for the preferred embodiments of the present disclosure. Based on the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A cycloid hydraulic motor with a braking function, comprising: A rotor-stator pair (1), the rotor-stator pair (1) comprising: A rotor (101) and a stator (102), wherein the rotor (101) is located inside the stator (102); An output shaft (2), the output shaft (2) being connected to the rotor (101) via a linkage shaft (3); A connecting shell (4), the connecting shell (4) being located on the left side of the stator (102), and the connecting shell (4) being sleeved on the linkage shaft (3); An elastic member (5) and a piston (6), wherein the elastic member (5) and the piston (6) are both installed in the connecting housing (4), and the left and right sides of the elastic member (5) are respectively in contact with the right side surface of the connecting housing (4) and the left side surface of the piston (6); When the motor is in operation, the piston (6) can move leftward to press the elastic member (5); When the motor is braked, the elastic member (5) can push the piston (6) to move rightward to prevent the rotor (101) from rotating.

2. The cycloid hydraulic motor with braking function according to claim 1, wherein: The invention also comprises: a housing (7), a connecting plate (8), a balancing plate (9), a distribution plate (10) and a rear cover (11) which are arranged in sequence from left to right; the connecting housing (4) is located between the housing (7) and the connecting plate (8); and the stator (102) is located between the balancing plate (9) and the distribution plate (10).

3. The cycloid hydraulic motor with braking function according to claim 2, wherein: The left side surface of the rotor (101) abuts against the right side surface of the balancing disk (9), and a first annular groove (1011) is provided on the left side surface of the rotor (101).

4. The cycloid hydraulic motor with braking function according to claim 3, wherein: The piston (6) comprises: a first piston part (601) and a second piston part (602), wherein the second piston part (602) is sleeved on the first piston part (601), the right side of the first piston part (601) is located in the connecting plate (8), the left side of the second piston part (602) is in contact with the right side of the elastic member (5), and the right side of the second piston part (602) is provided with a second annular groove (6021); When the motor brakes, the right side surface of the first piston part (601) abuts against the left end surface of the balancing disk (9).

5. The cycloid hydraulic motor with braking function according to claim 4, wherein: A plurality of first mounting grooves (402) and second mounting grooves (403) are provided in the connecting shell (4); the first mounting grooves (402) and the second mounting grooves (403) are separated by a partition (401); the elastic member (5) and the second piston portion (602) are both located in the first mounting groove (402); the left side of the elastic member (5) abuts against the right side of the first mounting groove (402); the first mounting groove (402) is communicated with the second annular groove (6021); and the left side of the first piston portion (601) is located in the second mounting groove (403).

6. The cycloid hydraulic motor with braking function according to claim 5, wherein: The second mounting groove (403) has a first side wall (4031), a second side wall (4032) and a third side wall (4033), the outer peripheral wall on the left side of the first piston part (601) abuts against the first side wall (4031), and there is a gap between the inner peripheral wall of the first piston part (601) and the second side wall (4032).

7. The gerotor hydraulic motor with braking function according to claim 6, wherein: When the motor is in operation, there is a gap between the left side surface of the first piston portion (601) and the third side wall (4033).

8. The gerotor hydraulic motor with braking function according to claim 7, wherein: The right side surface of the first piston part (601) is provided with a plurality of grooves (6011), and the plurality of grooves (6011) are distributed in a ring shape at equal intervals.

9. The gerotor hydraulic motor with braking function according to claim 8, wherein: A third annular groove (801) is provided on the right side surface of the connecting plate (8); the first annular groove (1011) and the second annular groove (6021) are both connected to the third annular groove (801); and the second mounting groove (403) is connected to the third annular groove (801) via the groove (6011).

10. The gerotor hydraulic motor with braking function according to claim 9, wherein: The connecting plate (8) is provided with an oil inlet channel (802), the inlet end of the oil inlet channel (802) is located on the outer peripheral surface of the connecting plate (8), and the outlet end of the oil inlet channel (802) is connected to the second annular groove (6021).

11. The gerotor hydraulic motor with braking function according to claim 10, wherein: The connecting shell (4) is also provided with a third through hole (404), and the first mounting groove (402) is connected to the interior of the shell (7) through the third through hole (404).

12. The gerotor hydraulic motor with braking function according to claim 11, wherein: The rear cover (11) is provided with an oil inlet (12) and an oil replenishing port (13); the oil inlet (12) is connected to the first annular groove (1011); and the oil replenishing port (13) is connected to the interior of the housing (7) through a flow channel.

13. The braking method of a cycloid hydraulic motor with a braking function according to any one of claims 1 to 12, comprising the following steps: S1, the motor is started, and the hydraulic oil pushes the piston (6) to move leftward. When the piston (6) moves leftward, the elastic member (5) is compressed. At this time, the rotor (101) can rotate and can drive the output shaft (2) to rotate through the linkage shaft (3); S2. When the hydraulic oil stops flowing, the elastic force of the elastic member (5) pushes the piston (6) to the right. At this time, the pressing force on the rotor (101) increases, and the rotor (101) stops rotating, so that the output shaft (2) cannot rotate, thereby achieving braking of the output shaft (2).

14. The braking method of a cycloid hydraulic motor with a braking function according to claim 13, wherein: When the motor is started, hydraulic oil flows from the oil inlet (12) into the rotor (101) and the second annular groove (6021) in sequence, pushing the piston (6) to move leftward and realizing the rotation of the output shaft (2).

15. The braking method of a cycloid hydraulic motor with a braking function according to claim 13 or 14, wherein: Before the motor is started, hydraulic oil flows from the oil inlet channel (802) into the second annular groove (6021), pushing the piston (6) to move leftward, so as to release the brake on the rotor (101) in advance; After the motor is started, hydraulic oil flows into the rotor (101) from the oil inlet (12), so that the output shaft (2) can be quickly rotated.

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