Radial plunger type hydraulic motor and working machine

Abstract

The radial plunger type hydraulic motor comprises a brake disc and a force application assembly which is arranged in a brake cavity and applies force to the brake disc, and the force application assembly comprises a brake piston, an elastic piece and a thickness-selectable pad increasing piece. The elastic piece is arranged between the brake piston and the cavity wall of the brake cavity in the axial direction; the pad increasing piece is arranged at at least one end of the two axial ends of the elastic piece so that the elastic piece can abut against the brake piston and / or the cavity wall through the pad increasing piece. At least one of the two axial ends of the elastic piece is provided with the pad increasing piece, so that when the radial plunger type hydraulic motor is assembled, the initial compression amount of the elastic piece is confirmed according to the braking force required by braking of the radial plunger type hydraulic motor, the accurate initial compression amount of the elastic piece can be ensured by arranging the pad increasing piece, and the axial size of the pad increasing piece is adjusted; therefore, the axial error of the radial plunger type hydraulic motor before the elastic piece is installed is made up, and when the radial plunger type hydraulic motor is braked, the braking effect is improved, and accurate braking is achieved.

Description

Technical Field

[0001] The present application relates to the field of hydraulic technology, and in particular to a radial piston hydraulic motor and an operating machine. Background Art

[0002] In a radial piston hydraulic motor, the power output can be braked by a brake disc, which is compressed by a series of parts such as a disc spring and a brake piston, and the brake is released by hydraulic pressure. When assembling a radial piston hydraulic motor, due to the inevitable axial errors of the components, the braking effect is poor when the radial piston hydraulic motor is braked. Utility Model Content

[0003] In view of this, the embodiments of the present application are directed to providing a radial piston hydraulic motor to solve the problem of poor braking effect when braking the radial piston hydraulic motor in the prior art.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A radial piston hydraulic motor comprises a brake disc and a force applying component arranged in a brake chamber and applying force to the brake disc, wherein the force applying component comprises:

[0006] Brake piston;

[0007] An elastic member, arranged between the brake piston and the cavity wall of the brake cavity in the axial direction;

[0008] A cushioning member with optional thickness is arranged at at least one of the two axial ends of the elastic member, so that the elastic member abuts against the brake piston and / or the cavity wall through the cushioning member.

[0009] Optionally, the thickness of the cushioning member may be selected according to the interval between the brake piston and the cavity wall to ensure a predetermined compression amount of the elastic member.

[0010] Optionally, the cushioning member is arranged between the brake piston and the elastic member.

[0011] Optionally, a positioning groove for the cushioning member to be embedded in is provided on the brake piston.

[0012] Optionally, the cushioning member is a first gasket, and a surface of the first gasket that abuts against the bottom wall of the positioning groove is provided with a chamfer.

[0013] Optionally, the radial piston hydraulic motor includes a housing and a cylinder body rotating in the housing, the cylinder body is a power output component of the radial piston hydraulic motor, and the force-applying assembly is arranged at an end opposite to the power output end of the cylinder body.

[0014] Optionally, the radial piston hydraulic motor includes a second gasket with an optional thickness to ensure that the total thickness of the brake disc and the second gasket is within a predetermined tolerance range.

[0015] The second gasket is arranged between the brake disc and the brake piston; or the brake piston is provided with a brake pin for applying thrust to the brake disc, and the second gasket is arranged between the brake disc and the brake pin.

[0016] Optionally, it includes a shaft portion extending into the cylinder body, the shaft portion is fixed to the shell, or the shaft portion is integrally formed with a part of the shell, the dynamic brake pad of the brake disc is connected to the cylinder body and rotates synchronously with the cylinder body, and the static brake pad of the brake disc is sleeved on the shaft portion and is circumferentially limited by the shaft portion through a spline arranged on the shaft portion.

[0017] Optionally, it includes a shaft portion connected to or integrally arranged with the cylinder body, the cylinder body and the shaft portion rotate together, the dynamic brake pad of the brake disc is connected to the shaft portion and rotates synchronously with the shaft portion, and the static brake pad of the brake disc is circumferentially limited with the shell by a spline arranged on the shell.

[0018] A working machine comprises the radial piston hydraulic motor described in any one of the above items.

[0019] According to the radial piston hydraulic motor provided by the present application, a cushion member with optional thickness is provided at at least one of the two axial ends of the elastic member. In this way, when assembling the radial piston hydraulic motor, the initial compression amount of the elastic member is confirmed according to the braking force required when the radial piston hydraulic motor is braked. By providing the cushion member, the accurate initial compression amount of the elastic member can be ensured, and the axial size of the cushion member is adjusted to compensate for the axial error of the radial piston hydraulic motor before the elastic member is installed, thereby improving the braking effect and achieving precise braking when the radial piston hydraulic motor is braked. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 A cross-sectional view of a radial piston hydraulic motor provided in an embodiment of the present application along the axis center of the shaft;

[0022] Figure 2 for Figure 1 Enlarged view of the area A with dashed line in the middle;

[0023] Figure 3 A cross-sectional view of a radial piston hydraulic motor according to another embodiment of the present invention is shown along the axial center of the shaft. DETAILED DESCRIPTION

[0024] The present application provides a radial piston hydraulic motor and also provides a working machine including the radial piston hydraulic motor.

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] like Figure 1-Figure 3 As shown, an embodiment of the present application provides a radial piston hydraulic motor. The radial piston hydraulic motor is a device that converts hydraulic energy into mechanical energy. The hydraulic system delivers hydraulic oil to the radial piston hydraulic motor to push the piston 101 to move, so that the power output end of the motor outputs power. The radial piston hydraulic motor can be installed in an operating machine and can output power to the operating machine so that the operating machine can complete mechanical movement. The radial piston hydraulic motor mainly includes a housing 4, a cylinder body 1, a shaft 2, a bearing 5 and a brake device 3. Figure 1 In the illustrated embodiment, the cylinder body 1 is arranged on the inner side of the housing 4, and the shaft portion 2 extends into and passes through the cylinder body 1 in the axial direction. When the radial piston hydraulic motor is working, the cylinder body 1 rotates relative to the housing 4 and the shaft portion 2, and the housing 4 and the shaft portion 2 are fixed. The cylinder body 1 is the power output end of the radial piston hydraulic motor; the bearing 5 is arranged between the housing 4 and the cylinder body 1 to realize the rotation of the cylinder body 1 relative to the housing 4; the braking device 3 is partially arranged between the cylinder body 1 and the shaft portion 2 to realize the braking of the cylinder body 1.

[0027] Specifically, the inner side surface of the housing 4 is provided with a cam surface 403 that cooperates with the plunger 101 of the cylinder body 1, and the plunger 101 is provided in the cylinder body 1 to radially reciprocate in the working chamber 102 under the guidance of the cam surface 403. When the radial piston hydraulic motor is working, the high-pressure hydraulic oil enters the working chamber 102 through the oil inlet and the distribution plate 12 of the radial piston hydraulic motor. The hydraulic oil entering the working chamber will push the plunger 101 to move in the working chamber, and the top of the plunger 101 contacts the cam surface 403 (usually the plunger 101 includes a roller, and the roller contacts the cam surface 403), so that the cylinder body 1 will rotate relative to the cam surface 403. The cylinder body 1 is provided with a power output part connected to an external mechanism, such as a spline or a bolt hole, as a power output part of the radial piston hydraulic motor.

[0028] In the radial piston hydraulic motor of the above structure, the cylinder body 1 is the power output part of the radial piston hydraulic motor. Compared with the radial piston hydraulic motor that outputs power from the shaft 2, the present application outputs power through the cylinder body 1, has high power output efficiency, and the sealing difficulty of the cylinder body 1 outputting the power motor is low.

[0029] In some embodiments, the housing 4 mainly includes a front housing 401 provided with a cam surface 403 and a rear housing 402 accommodating a distributor plate 12, wherein at least a part of the cylinder body 1 is arranged in the front housing 401, and the working chamber 102 of the cylinder body 1 accommodating the plunger 101 is located in the area where the front housing 401 is located; the rear housing 402 accommodates the distributor plate 12, and the distributor plate 12 is positioned by the positioning pin 13, so as to realize the relative rotation of the cylinder body 1 relative to the distributor plate 12, realize the delivery of high-pressure hydraulic oil to the working chamber 102, and output of low-pressure hydraulic oil from the working chamber 102. By setting the housing 4 as described above, the structure of the radial piston hydraulic motor is made compact, and the overall volume of the radial piston hydraulic motor is reduced. In addition, the positioning pin 13 can be used to easily and accurately realize the positioning of the distributor plate 12.

[0030] Furthermore, the rear housing 402 includes a first accommodating chamber 4021, a second accommodating chamber 4022 and a limiting portion, wherein the first accommodating chamber 4021 is used to accommodate the valve plate 12, and the second accommodating chamber 4022 is used to accommodate the force-applying assembly 301, which is a component for applying braking force to the brake disc 302, so that the installation of the valve plate 12 and the force-applying assembly 301 is convenient, and the layout of the radial piston hydraulic motor is more compact. The shaft portion 2 is fixed to the rear housing 402 to limit the rotation and / or movement of the shaft portion 2.

[0031] In some embodiments, the shaft portion 2 is a hollow shaft, and the shaft-like portion of other equipment can pass through the middle of the hollow shaft. As can be seen from the above, when the cylinder body 1 outputs power, the shaft portion 2 is fixed, so that the shaft-like portion of other equipment passes through the middle of the hollow shaft without affecting the arrangement and setting of the radial piston hydraulic motor, and will not affect the power output of the radial piston hydraulic motor. The shaft-like portion of the equipment passing through the hollow shaft can also facilitate the arrangement of other equipment, thereby reducing the footprint of the equipment and making the overall layout of other equipment and the radial piston hydraulic motor more compact.

[0032] Exemplarily, other devices having a shaft-like portion may be a pump, a motor, an engine, an electric machine, a fan, or the like.

[0033] In addition, the shaft portion 2 may also be a solid shaft, so that the solid shaft does not allow the shaft-shaped portion of other equipment to pass through the middle of the solid shaft.

[0034] In some embodiments, the bearings 5 ​​include at least two, which are respectively arranged on both sides of the working chamber 102 and abut against the working chamber 102. Taking two bearings 5 ​​as an example, the bearings 5 ​​arranged on both sides of the working chamber 102 are respectively a first bearing 501 and a second bearing 502.

[0035] In some embodiments, the braking device 3 includes a brake disc 302 and a force-applying assembly 301 for applying force to the brake disc 302. The brake disc 302 is arranged between the shaft 2 and the cylinder body 1, and is at least partially arranged on the radial inner side of the piston 101. This facilitates the arrangement of the brake disc 302 and makes the overall structure of the radial piston hydraulic motor more compact. Setting the brake disc 302 between the shaft 2 and the cylinder body 1 can also efficiently achieve braking of the cylinder body 1.

[0036] Furthermore, the brake disc 302 includes a plurality of dynamic brake pads 3021 and a plurality of static brake pads 3022, and the plurality of dynamic brake pads 3021 rotate synchronously with the cylinder body 1 when the cylinder body 1 rotates, and the plurality of static brake pads 3022 are arranged on the shaft portion 2 in the rotation direction. In this way, when it is necessary to brake the rotating cylinder body 1, the force-applying component 301 is used to apply thrust to the static brake pads 3022, so that the plurality of static brake pads 3022 are respectively in contact with the plurality of dynamic brake pads 3021, thereby applying braking force to the dynamic brake pads 3021 connected to the cylinder body 1, thereby achieving the effect of braking the rotating cylinder body 1.

[0037] Furthermore, the force-applying assembly 301 includes a brake pin 3011, a brake piston 3012 and a disc spring 3013, wherein the brake pin 3011 passes through a portion of the rear housing 402 and is capable of axially compressing and loosening the brake disc 302; the brake piston 3012 is connected to the brake pin 3011 and has a force-bearing surface that withstands hydraulic pressure, and when the force-bearing surface is subjected to hydraulic pressure, the brake piston 3012 drives the brake pin 3011 to move away from the brake disc 302; the disc spring 3013 applies a force toward the brake disc 302 to the brake piston 3012, and the force can be transmitted to the brake disc 302 via the brake pin 3011 and compress the brake disc 302.

[0038] In some embodiments, the second accommodating chamber 4022 is used to accommodate the force-applying assembly 301. The second accommodating chamber 4022 includes a brake pressure chamber 40221. The brake pressure chamber 40221 is located on the side of the brake piston 3012 away from the disc spring 3013 and is surrounded by the cylinder body 1, the brake piston 3012, the brake pin 3011, the shaft 2 and multiple seals. Specifically, when the brake cylinder 1 is needed, the pressure of the hydraulic oil in the brake pressure chamber 40221 is cut off, and the hydraulic oil no longer pushes the brake piston 3012 to drive the brake pin 3011 to move in the direction away from the brake disc 302. The disc spring 3013 in a compressed state applies an axial force to the brake piston 3012 close to the brake disc 302, thereby pushing the brake pin 3011 to squeeze the brake disc 302, so that the multiple static brake pads 3022 and the multiple dynamic brake pads 3021 abut against each other to achieve braking of the cylinder 1; when it is necessary to release the brake on the cylinder 1, hydraulic oil with a certain hydraulic pressure is input into the brake pressure chamber 40221, and the force-bearing surface of the brake piston 3012 is subjected to the hydraulic pressure of the hydraulic oil, so that the brake piston 3012 drives the brake pin 3011 to move in the direction away from the brake disc 302, and the pressure applied by the brake pin 3011 to the static brake pad 3022 is released, so that the multiple static brake pads 3022 and the multiple dynamic brake pads 3021 are separated to release the brake on the cylinder 1.

[0039] It should be noted that when the disc spring 3013 is installed in the radial piston hydraulic motor, the disc spring 3013 is in a compressed state, and the disc spring 3013 applies elastic force to the brake piston 3012 and the brake pin 3011 to move toward the brake disc 302. When the cylinder body 1 is braked, the brake pin 3011 abuts against the static brake pad 3022; when the cylinder body 1 is not braked, the brake pin 3011 is separated from the static brake pad 3022.

[0040] Furthermore, the brake disc 302 also includes a second gasket 3023 of optional thickness disposed between the static brake pad 3022 and the brake pin 3011. Specifically, the end of the shaft portion 2 away from the force-applying assembly 301 is supported by the second support member 6, and the second support member 6 is fixed to the front housing 401 by a retaining ring 15. During the assembly of the radial piston hydraulic motor, due to the accumulated errors of the retaining ring 15, the second support member 6, and the multiple static brake pads 3022 and the multiple dynamic brake pads 3021, the right end face of the brake disc 302 may be misaligned in the axial direction. Therefore, a second gasket 3023 is disposed between the brake disc and the brake pin 3011, so as to ensure that the total thickness of the brake disc 302 and the second gasket 3023 is within the tolerance range required by the process. Figure 1As shown, a third gasket 3024 may be provided between the second gasket 3023 and the brake pin 3011. This is because the brake pin 3011 is not aligned with the second gasket 3023 and the brake disc 302 in the radial direction, and the third gasket 3024 may transmit the force from the disc spring 3013 to the second gasket 3023. It can be understood that the third gasket 3024 may be omitted under appropriate circumstances. Among them, "the second gasket 3023 is provided between the brake disc 302 and the brake pin 3011" does not mean that the second gasket 3023 must be in direct contact with the brake disc 302 and the brake pin 3011, which includes the situation where the third gasket 3024 or other parts are provided, as long as the second gasket 3023 is axially located between the brake disc 302 and the brake pin 3011.

[0041] In addition, a cushioning member (first gasket) 3014 with an optional thickness is provided on at least one of the two axial sides of the disc spring 3013, so that the disc spring 3013 abuts against the brake piston 3012 and / or the cavity wall through the cushioning member 3014. Figure 1 In the illustrated embodiment, the cushioning member 3014 is arranged between the disc spring 3013 and the brake piston 3012.

[0042] As a method of selecting the additional pad 3014, the exact dimensions of all relevant parts such as the brake disc 302, the second gasket 3023, the third gasket 3024, the brake pin 3011, the brake piston 3012, etc. can be measured, and the working height of the disc spring 3013 can be controlled by superimposing the dimension chain. Then, based on the calculated closed-loop result of the dimension chain of the working height of the disc spring 3013, the additional pad 3014 of appropriate thickness can be selected to ensure that the final working height of the disc spring 3013 meets the design requirements.

[0043] As another way to select the additional pad 3014, during the installation of the radial piston hydraulic motor, after the front housing 401, the rear housing 402, the bearing 5, the sealing structure between the cylinder 1 and the shaft 2, the brake disc 301 and the brake piston 3012 are installed, the distance between the brake piston 3012 and the cavity wall can be determined in the axial direction, and then according to the initial compression size required by the disc spring 3013, the distance between the brake piston 3012 and the cavity wall minus the initial compression size required by the disc spring 3013 is used to obtain the size of the additional pad 3014. Therefore, the thickness of the additional pad 3014 is selected according to the distance between the brake piston 3012 and the cavity wall to ensure the predetermined compression amount of the disc spring 3013.

[0044] By providing the shims 3014 of different sizes, it is convenient to uniformly compensate for the errors of a series of parts such as the front housing 401, the rear housing 402, the end cover 16, the brake piston 3012, the brake pin 3011, etc., thereby improving the braking effect of the disc spring 3013 when braking the brake disc 302 through the brake piston 3012 and the brake pin 3011. In addition, by adjusting the shims, the dimensional tolerances of other parts can be relaxed, reducing the processing cost of parts.

[0045] Furthermore, the padding member 3014 is disposed between the brake piston 3012 and the disc spring 3013. Thus, after measuring the above distance and selecting the padding member 3014 of suitable size, the padding member 3014 is installed, and then the disc spring 3013 is installed. Since the disc spring 3013 is initially installed in a compressed state, the compressed disc spring 3013 applies elastic force to the padding member 3014, so that the positions of the brake piston 3012, the padding member 3014 and the disc spring 3013 are fixed, thereby avoiding displacement of the padding member 3014 and making the above structure compactly installed.

[0046] On the basis of arranging the additional padding member between the brake piston 3012 and the disc spring 3013, in order to further improve the stability of the additional padding member 3014 after the additional padding member 3014 is installed, a positioning groove 30121 is arranged on the side of the brake piston 3012 close to the additional padding member 3014, and the positioning groove 30121 provides an installation position for the additional padding member 3014. In this way, when assembling the radial piston hydraulic motor, after the brake piston 3012 and other components are installed, the additional padding member 3014 is installed in the positioning groove 30121 of the brake piston 3012, and then when the disc spring 3013 is installed, the disc spring 3013 will apply elastic force to the additional padding member 3014, so that the additional padding member 3014 is firmly arranged in the positioning groove 30121, so as to prevent the additional padding member 3014 from shaking and displacement, and make the positions of the brake piston 3012, the additional padding member 3014 and the disc spring 3013 stable.

[0047] Furthermore, the bottom corner of the positioning groove 30121 may be difficult to be processed into a right angle. In order to avoid interference with the bottom angle, the outer peripheral edge of the padding member 3014 matching the bottom angle is chamfered, thereby setting the distance between the padding member 3014 and the groove wall of the positioning groove 30121 to be smaller, further reducing the shaking of the padding member 3014.

[0048] In other embodiments, the cylinder body 1 and the shaft portion 2 may also be arranged in other ways, the cylinder body 1 is arranged inside the housing 4, and the cylinder body 1 and the shaft portion 2 are connected, such as Figure 3As shown; when the radial piston hydraulic motor is working, the cylinder body 1 and the shaft 2 rotate together, the housing 4 is fixed, and the cylinder body 1 is still the power output end of the radial piston hydraulic motor. Specifically, the shaft 2 and the cylinder body 1 can be fixedly connected by a spline or other structure. In addition, the shaft 2 and the cylinder body 1 can also be integrally formed. Among them, a spline is arranged on the circumferential inner side of the housing 4, the static brake pad 3022 is circumferentially limited by the spline with the housing 4, and the dynamic brake pad 3021 is circumferentially limited by the spline with the shaft 2. In this scheme, the brake piston 3012 can directly press against the brake disc 302, and the brake pin 3011 is omitted. However, a second gasket 3023 can be arranged between the brake piston 3012 and the brake disc 302, and / or a cushioning member 3014 can be arranged on the axial side of the brake piston 3012, which will not be repeated here.

[0049] The present invention also relates to a working machine comprising the above radial piston motor. Since the working machine comprises the above radial piston hydraulic motor, the beneficial effects of the working machine brought by the radial piston hydraulic motor can be seen in the above content and will not be repeated here.

[0050] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0051] The components and devices involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the drawings. As will be appreciated by those skilled in the art, these components and devices can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, meaning "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0052] It should also be noted that in the device and apparatus of the present application, each component can be decomposed and / or reassembled, and such decomposition and / or reassembly should be regarded as an equivalent solution of the present application.

[0053] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0054] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0055] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0056] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A radial piston hydraulic motor, characterized in that: The invention comprises a brake disc and a force-applying component arranged in a brake cavity and applying force to the brake disc, wherein the force-applying component comprises: Brake piston; An elastic member, arranged between the brake piston and the cavity wall of the brake cavity in the axial direction; A cushioning member with optional thickness is arranged at at least one of the two axial ends of the elastic member, so that the elastic member abuts against the brake piston and / or the cavity wall through the cushioning member.

2. The radial piston hydraulic motor according to claim 1, characterized in that: The thickness of the cushioning member may be selected according to the interval between the brake piston and the cavity wall to ensure a predetermined compression amount of the elastic member.

3. The radial piston hydraulic motor according to claim 1, characterized in that: The cushioning member is arranged between the brake piston and the elastic member.

4. The radial piston hydraulic motor according to claim 1, characterized in that: The brake piston is provided with a positioning groove for the cushioning member to be embedded in.

5. The radial piston hydraulic motor according to claim 4, characterized in that: The cushioning component is a first gasket, and a surface of the first gasket that abuts against the bottom wall of the positioning groove is provided with a chamfer.

6. The radial piston hydraulic motor according to claim 1, characterized in that: The radial piston hydraulic motor comprises a housing and a cylinder body rotating in the housing, the cylinder body is a power output component of the radial piston hydraulic motor, and the force applying assembly is arranged at an end opposite to the power output end of the cylinder body.

7. The radial piston hydraulic motor according to claim 6, characterized in that: The radial piston hydraulic motor includes a second gasket with an optional thickness to ensure that the total thickness of the brake disc and the second gasket is within a predetermined tolerance range. The second gasket is arranged between the brake disc and the brake piston; or the brake piston is provided with a brake pin for applying thrust to the brake disc, and the second gasket is arranged between the brake disc and the brake pin.

8. The radial piston hydraulic motor according to claim 7, characterized in that: It includes a shaft portion extending into the cylinder body, the shaft portion is fixed to the shell, or the shaft portion is formed integrally with a part of the shell, the dynamic brake pad of the brake disc is connected to the cylinder body and rotates synchronously with the cylinder body, and the static brake pad of the brake disc is sleeved on the shaft portion and is circumferentially limited by the shaft portion through a spline arranged on the shaft portion.

9. The radial piston hydraulic motor according to claim 7, characterized in that: It includes a shaft portion connected to or integrally arranged with the cylinder body, the cylinder body and the shaft portion rotate together, the dynamic brake pad of the brake disc is connected to the shaft portion and rotates synchronously with the shaft portion, and the static brake pad of the brake disc is circumferentially limited with the shell by a spline arranged on the shell.

10. A working machine, characterized in that: A radial piston hydraulic motor comprising any one of claims 1-9.

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