Swash plate type plunger motor or swash plate type plunger pump

Abstract

The utility model provides a swash plate type plunger motor or a swash plate type plunger pump, the swash plate type plunger motor or the swash plate type plunger pump comprises a shell, a cylinder body contained in the shell, a rotating assembly and a thrust plate, and the rotating assembly is contained in the shell and comprises the cylinder body, a plunger arranged in a plunger hole of the cylinder body and a sliding shoe rotationally connected with the plunger; the thrust plate is obliquely arranged in the shell and comprises a plate body and a plurality of positioning structures, the sliding shoe is in sliding contact with the plate body so as to guide the plunger to axially slide in the plunger hole in a reciprocating manner, and the positioning structures are arranged on the edge of the plate body and are asymmetrically arranged in the circumferential direction of the plate body about the center of the plate body; thus, in the assembling process, when the thrust plate is installed reversely or the installation angle deviates, interference occurs between the positioning structure and the shell or between the thrust plate and a structure matched with the positioning structure in the shell, so that the thrust plate cannot be placed at the position, used for assembling the thrust plate, in the shell, and then the thrust plate can be effectively prevented from being installed reversely.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic transmission, and in particular to a swash plate type piston motor or a swash plate type piston pump. Background Art

[0002] Swash plate piston motors and swash plate piston pumps are important components in the field of hydraulic transmission and control, and both are based on the interaction between thrust plates and rotating components to achieve energy conversion and transmission.

[0003] At present, the thrust plates in swash plate type piston motors and swash plate type piston pumps are mostly positioned and assembled in the housing through a pin hole structure. However, on the one hand, the processing and assembly process of the pin hole structure is complicated, which leads to high equipment cost. On the other hand, during the assembly process, the thrust plate is easily installed upside down (that is, the side of the thrust plate corresponding to the swash plate support is installed in the housing toward the piston structure). Since the processing requirements and wear resistance of the side of the thrust plate corresponding to the piston structure are higher than those of the side of the thrust plate corresponding to the swash plate support, once the thrust plate is installed upside down, it will cause its function to fail, affecting the service life of the swash plate type piston motor or the swash plate type piston pump. Utility Model Content

[0004] In view of this, the present application provides a swash plate type piston motor or a swash plate type piston pump, which can effectively avoid the thrust plate from being installed upside down by improving the structure of the thrust plate, reduce the assembly difficulty of the swash plate type piston motor or the swash plate type piston pump, and improve the assembly efficiency.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A swash plate type piston motor, comprising:

[0007] case;

[0008] A rotating assembly accommodated in the housing, the rotating assembly comprising a cylinder, a plunger disposed in a plunger hole of the cylinder, and a sliding shoe connected to the plunger;

[0009] The thrust plate is obliquely arranged inside the shell, and includes a plate body and a plurality of positioning structures. The sliding shoe is in sliding contact with the plate body. The plurality of positioning structures are arranged on the edge of the plate body and are asymmetrically arranged about the center of the plate body in the circumferential direction of the plate body.

[0010] Preferably, the thrust plate is a powder metallurgy plate, and the same thrust plate includes the positioning structures of various shapes and / or sizes.

[0011] Preferably, the plate body is circular or elliptical, and the positioning structure includes:

[0012] a radial protrusion, located on the circumferential edge of the plate body and protruding in a direction away from the center of the plate body;

[0013] The first clamping groove is formed on the radial protrusion and is recessed from the protruding end of the protrusion toward the center of the plate body.

[0014] Preferably, the positioning structure is formed on the edge of the plate body and is a first groove that is recessed from the edge of the plate body toward the center of the plate body, and there is a gap between the sliding track of the sliding shoe on the plate body and the first groove.

[0015] Preferably, the positioning structure comprises: a radial protrusion, which is located on the edge of the plate body and protrudes in a direction away from the center of the plate body; a first axial protrusion, which is arranged on the radial protrusion and protrudes axially relative to the mounting surface of the plate body;

[0016] or,

[0017] The positioning structure is a first axial protrusion that is arranged on the edge of the plate body and protrudes axially relative to the mounting surface of the plate body.

[0018] Preferably, the grooves of all the positioning structures are spherical grooves. When the same thrust plate includes the positioning structures of various shapes or sizes, the radii of the spherical grooves of the positioning structures of different structures are different.

[0019] Preferably, the multiple positioning structures include only a first positioning structure and a second positioning structure, and the distance between the first positioning structure and the center of the plate body is different from the distance between the second positioning structure and the center of the plate body, and / or the protruding or recessed size of the first positioning structure is different from the protruding or recessed size of the second positioning structure.

[0020] Preferably, on the edge of the plate body, an angle between a line connecting the center of the first positioning structure and the center of the plate body and a line connecting the center of the second positioning structure and the center of the plate body is α, and 165°≤α<180°.

[0021] Preferably, a plurality of mating structures that match the plurality of positioning structures of the thrust plate one-to-one are provided on the inner wall of the shell, and the mating structures can at least achieve circumferential positioning of the thrust plate in the shell by cooperating with the positioning structures, and the mating structures and the positioning structures are both formed in a non-material removal manner.

[0022] Preferably, the positioning structure comprises: a radial protrusion located on the edge of the plate body and protruding in a direction away from the center of the plate body, and a first groove formed on the radial protrusion and recessed from the protruding end of the protrusion toward the center of the plate body; the matching structure comprises: a second axial protrusion protruding on the inner wall of the shell and capable of extending into the first groove and matching with the first groove;

[0023] Alternatively, the positioning structure includes: a radial protrusion located on the edge of the plate body and protruding in a direction away from the center of the plate body, and a first axial protrusion arranged on the radial protrusion and protruding axially relative to the mounting surface of the plate body; the mating structure includes: a second groove formed on the inner wall of the shell and capable of allowing the first axial protrusion to extend into and cooperate with the first axial protrusion.

[0024] Preferably, one of the positioning structure and the matching structure is a spherical groove, and the other is a spherical protrusion.

[0025] Preferably, a center hole allowing a center shaft to pass through is provided at a center position of the thrust plate, and the center shaft penetrates the housing in the axial direction.

[0026] A swash plate type plunger pump, comprising:

[0027] case;

[0028] A rotating assembly accommodated in the housing, the rotating assembly comprising a cylinder, a plunger disposed in a plunger hole of the cylinder, and a sliding shoe connected to the plunger;

[0029] The thrust plate is obliquely arranged inside the shell, and includes a plate body and a plurality of positioning structures. The sliding shoe is in sliding contact with the plate body. The plurality of positioning structures are arranged on the edge of the plate body and are asymmetrically arranged about the center of the plate body in the circumferential direction of the plate body.

[0030] Preferably, the thrust plate is a powder metallurgy plate, and the same thrust plate includes the positioning structures of various shapes and / or sizes.

[0031] Preferably, the plate body is circular or elliptical, and the positioning structure includes:

[0032] a radial protrusion, located on the circumferential edge of the plate body and protruding in a direction away from the center of the plate body;

[0033] The first clamping groove is formed on the radial protrusion and is recessed from the protruding end of the protrusion toward the center of the plate body.

[0034] Preferably, the positioning structure is formed on the edge of the plate body and is a first groove that is recessed from the edge of the plate body toward the center of the plate body, and there is a gap between the sliding track of the sliding shoe on the plate body and the first groove.

[0035] Preferably, the positioning structure comprises: a radial protrusion, which is located on the edge of the plate body and protrudes in a direction away from the center of the plate body; a first axial protrusion, which is arranged on the radial protrusion and protrudes axially relative to the mounting surface of the plate body;

[0036] or,

[0037] The positioning structure is a first axial protrusion that is arranged on the edge of the plate body and protrudes axially relative to the mounting surface of the plate body.

[0038] Preferably, the grooves of all the positioning structures are spherical grooves. When the same thrust plate includes the positioning structures of various shapes or sizes, the radii of the spherical grooves of the positioning structures of different structures are different.

[0039] Preferably, the multiple positioning structures include only a first positioning structure and a second positioning structure, and the distance between the first positioning structure and the center of the plate body is different from the distance between the second positioning structure and the center of the plate body, and / or the protruding or recessed size of the first positioning structure is different from the protruding or recessed size of the second positioning structure.

[0040] Preferably, on the edge of the plate body, an angle between a line connecting the center of the first positioning structure and the center of the plate body and a line connecting the center of the second positioning structure and the center of the plate body is α, and 165°≤α<180°.

[0041] Preferably, a plurality of mating structures that match the plurality of positioning structures of the thrust plate one-to-one are provided on the inner wall of the shell, and the mating structures can at least achieve circumferential positioning of the thrust plate in the shell by cooperating with the positioning structures, and the mating structures and the positioning structures are both formed in a non-material removal manner.

[0042] Preferably, the positioning structure comprises: a radial protrusion located on the edge of the plate body and protruding in a direction away from the center of the plate body, and a first groove formed on the radial protrusion and recessed from the protruding end of the protrusion toward the center of the plate body; the matching structure comprises: a second axial protrusion protruding on the inner wall of the shell and capable of extending into the first groove and matching with the first groove;

[0043] Alternatively, the positioning structure includes: a radial protrusion located on the edge of the plate body and protruding in a direction away from the center of the plate body, and a first axial protrusion arranged on the radial protrusion and protruding axially relative to the mounting surface of the plate body; the mating structure includes: a second groove formed on the inner wall of the shell and capable of allowing the first axial protrusion to extend into and cooperate with the first axial protrusion.

[0044] Preferably, one of the positioning structure and the matching structure is a spherical groove, and the other is a spherical protrusion.

[0045] Preferably, a center hole allowing a center shaft to pass through is provided at a center position of the thrust plate, and the center shaft penetrates the housing in the axial direction.

[0046] The thrust plate in the swash plate type piston motor or swash plate type piston pump provided in the present application includes a plate body, and a plurality of asymmetric positioning structures are arranged at the edge position of the plate body. In this way, during the assembly process, when the thrust plate is installed upside down or the installation angle is offset, interference will occur between the positioning structure and the housing or between the thrust plate and the structure of the positioning structure that cooperates with the housing, resulting in the thrust plate being unable to be placed in the corresponding position inside the housing (i.e., the assembly position of the thrust plate), thereby effectively preventing the thrust plate from being installed upside down. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] 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.

[0048] Figure 1 A partial cross-sectional view of a swash plate type piston motor provided in an embodiment of the present application;

[0049] Figure 2 A front view of a thrust plate provided in an embodiment of the present application;

[0050] Figure 3 For the general Figure 2 Schematic diagram of the thrust plate being assembled to the housing.

[0051] exist Figure 1-Figure 3 middle:

[0052] 1-housing, 2-center shaft, 3-thrust plate, 4-plunger, 5-cylinder body, 6-shoe, 7-rotating assembly;

[0053] 11-swash plate support, 12-matching structure;

[0054] 31-plate body, 32-positioning structure;

[0055] 51- plunger hole;

[0056] 321 - radial protrusion, 322 - first slot. DETAILED DESCRIPTION

[0057] The present application provides a swash plate type piston motor or a swash plate type piston pump.

[0058] 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.

[0059] like Figure 1-Figure 3 As shown, the swash plate type piston motor or swash plate type piston pump in the embodiment of the present application comprises a housing 1, a thrust plate 3, a rotating assembly 7 and a central shaft 2, wherein a swash plate support 11 is provided inside the housing 1 for assembling the thrust plate 3, and a limiting structure is provided between the thrust plate 3 and the housing 1 for limiting the circumferential displacement of the thrust plate 3 relative to the housing 1, and a central hole is provided at the center of the thrust plate 3 for allowing at least one end of the central shaft 2 to pass through, and the central shaft 2 axially penetrates the housing 1. The rotating assembly 7 comprises a cylinder body 5, a plunger 4 and a sliding shoe 6, the cylinder body 5 is sleeved on the central shaft 2 and is located on the side of the thrust plate 3 away from the swash plate support 11, and a plurality of axially extending plunger holes 51 are provided on the side of the cylinder body 5 facing the thrust plate 3, one end of the plunger 4 extends into the piston hole, the other end of the plunger 4 is rotatably connected to the sliding shoe 6 through a ball head structure, and the end of the sliding shoe 6 away from the cylinder body 5 contacts the thrust plate 3 to guide the plunger 4 to slide axially back and forth in the plunger hole 51.

[0060] For the swash plate type piston motor, the hydraulic oil flows into the piston hole 51, forming an axial thrust on the piston 4. Since the thrust plate 3 is arranged at an angle, the reaction force of the thrust plate 3 on the piston 4 includes a radial component, so that the piston 4 drives the cylinder 5 and the central shaft 2 to rotate, thereby achieving the output of torque. For the swash plate type piston pump, the central shaft drives the cylinder 5 and the piston 4 to rotate, thereby outputting hydraulic pressure, which will not be described in detail here.

[0061] It should be noted that the matching parts of the housing 1 and the thrust plate 3 are formed by non-material removal processing, that is, there is no need to form grooves or holes by cutting and drilling through machining processes, so that the processing technology of the housing 1 can be simplified and the production efficiency can be improved. In an exemplary embodiment, the housing 1 is a cast housing 1 formed by a casting process, and the thrust plate 3 is a powder metallurgy plate formed by a powder metallurgy process. The positioning structure and matching structure described below are integrally formed on the housing 1 and the thrust plate 3, so no additional machining is required.

[0062] In some embodiments, the limiting structure includes a positioning structure 32 disposed on the thrust plate 3 and a matching structure 12 disposed on the shell 1 , wherein the matching structure 12 is disposed on the inner wall of the shell 1 and matches one-to-one with the multiple positioning structures 32 on the thrust plate 3 .

[0063] Further, such as Figure 2 and Figure 3 As shown, the thrust plate 3 includes a plate body 31 and a plurality of positioning structures 32, wherein the plurality of positioning structures 32 are arranged on the edge of the plate body 31 and are arranged asymmetrically about the center of the plate body 31 in the circumferential direction of the plate body 31, and the arrangement position and the number of the matching structures 12 on the inner wall of the housing 1 match the positioning structures 32. With such an arrangement, during the assembly process of the swash plate type piston motor or swash plate type piston pump, once the thrust plate 3 is reversely installed or the installation angle is offset, interference will occur between the positioning structures 32 and the housing 1 or between the thrust plate 3 and the matching structures 12, resulting in the thrust plate 3 being unable to be placed at the corresponding position inside the housing 1 (i.e., the assembly position of the thrust plate 3), thereby effectively avoiding the thrust plate 3 from being reversely installed and realizing the circumferential positioning of the thrust plate 3 in the housing 1. In addition, since the positioning pin structure is eliminated, the assembly process can be simplified, thereby improving the production efficiency of the swash plate type piston motor or swash plate type piston pump.

[0064] In some embodiments, there are only two positioning structures 32, including a first positioning structure and a second positioning structure, and the angle between the line connecting the center of the first positioning structure and the center of the plate body 31 and the line connecting the center of the second positioning structure and the center of the plate body 31 is α, 165°≤α<180°, so that the first positioning structure and the second positioning structure are asymmetrically arranged about the center of the plate body 31 in the circumferential direction of the plate body 31; correspondingly, there are two matching structures 12, including a first matching structure and a second matching structure, and the setting position of the first matching structure corresponds to the first positioning structure, and the setting position of the second matching structure corresponds to the second positioning structure; such a setting can, on the one hand, avoid the thrust plate 3 from being installed upside down, and on the other hand, make the force uniform, avoiding local stress concentration on the thrust plate 3 during the operation of the swash plate piston motor or the swash plate piston pump. Exemplary:

[0065] In some embodiments, the angle between the line connecting the center of the first positioning structure and the center of the plate body 31 and the line connecting the center of the second positioning structure and the center of the plate body 31 is 165°; the first matching structure and the second matching structure are respectively provided at the positions corresponding to the first positioning structure and the second positioning structure on the shell 1.

[0066] In other embodiments, the angle between the line connecting the center of the first positioning structure and the center of the plate body 31 and the line connecting the center of the second positioning structure and the center of the plate body 31 is 179°; the first matching structure and the second matching structure are respectively provided at the positions corresponding to the first positioning structure and the second positioning structure on the shell 1.

[0067] In other embodiments, the angle between the line connecting the center of the first positioning structure and the center of the plate body 31 and the line connecting the center of the second positioning structure and the center of the plate body 31 is 170°; the first matching structure and the second matching structure are respectively provided at the positions corresponding to the first positioning structure and the second positioning structure on the shell 1.

[0068] Further, in some embodiments, the distance between the first positioning structure and the center of the plate body 31 is different from the distance between the second positioning structure and the center of the plate body 31; thus, when the thrust plate 3 is reversely installed and the plate body 31 is in the assembly position, the first positioning structure and the first matching structure, the second positioning structure and the second matching structure will not correspond to each other, thereby strengthening the anti-reverse installation effect of the first positioning structure and the second positioning structure. Exemplarily, in an exemplary embodiment, the distance between the first positioning structure and the center of the plate body 31 is greater than the distance between the second positioning structure and the center of the plate body 31.

[0069] It should be understood that the above is only an example of setting two positioning structures 32 and matching structures 12, and an exemplary description of the distribution of the positioning structures 32 and matching structures 12 in the present application, but the present application is not limited to this. By way of example, in a specific implementation, the number of positioning structures 32 and matching structures 12 can be set to three as needed, and the angles between the centers of the three positioning structures 32 and the centers of the plate body 31 are different; or, the number of positioning structures 32 and matching structures 12 can be set to four as needed, and the angles between the centers of the four positioning structures 32 and the centers of the plate body 31 are different.

[0070] In addition, regarding the arrangement of the positioning structure 32 and the matching structure 12, in some embodiments, one of the positioning structure 32 and the matching structure 12 is arranged as a protrusion, and the other is arranged as a groove, and the circumferential positioning of the thrust plate 3 in the housing 1 is achieved by the cooperation of the groove and the protrusion. Exemplary:

[0071] In some embodiments, the positioning structure 32 is formed on the edge of the plate body 31, and is formed by a first groove 322 that is recessed from the edge of the plate body 31 toward the center of the plate body 31, and there is a gap between the sliding trajectory of the sliding shoe 6 on the plate body 31 and the first groove 322 to ensure that there is no interference between the first groove 322 and the moving trajectory of the sliding shoe 6 on the thrust plate 3; the matching structure 12 includes a second axial protrusion protruding from the inner wall of the shell 1. During the assembly process, the second axial protrusion is extended into the first groove 322 and clamped with the first groove 322, thereby realizing the circumferential positioning of the thrust plate 3 in the shell 1.

[0072] Further preferably, Figure 2 As shown, the positioning structure 32 includes a radial protrusion 321 and a first groove 322, wherein the radial protrusion 321 is a protruding structure arranged on the edge of the plate body 31 and protruding in a direction away from the center of the plate body 31, and the first groove 322 is a groove structure formed on the radial protrusion 321 and recessed from the protruding end of the protrusion toward the direction close to the center of the plate body 31; such an arrangement can reduce the volume of the thrust plate 3, save materials, and help reduce the volume of the swash plate piston motor or swash plate piston pump.

[0073] In other embodiments, the positioning structure includes a radial protrusion and a first axial protrusion, wherein the radial protrusion is located on the edge of the plate body and protrudes in a direction away from the center of the plate body, and the first axial protrusion is arranged on the radial protrusion and protrudes axially relative to the mounting surface of the plate body (the mounting surface refers to a side of the thrust plate facing the swash plate support when the thrust plate is assembled on the shell); the matching structure includes a second groove cast on the inner wall of the shell (specifically, the surface of the swash plate support facing the thrust plate), and during the assembly process, the first axial protrusion is extended into the second groove and clamped with the second groove, thereby realizing the circumferential positioning of the thrust plate in the shell.

[0074] Further preferably, since the first axial protrusion is located on the mounting surface of the plate body 31, it will not interfere with the sliding of the piston 4 on the thrust plate 3. Therefore, in some embodiments, the first axial protrusion is directly arranged on the edge of the plate body 31. In this way, since the radial protrusion 321 is omitted, the end surface area of ​​the thrust plate 3 can be reduced, which is beneficial to reduce the volume of the swash plate piston motor or the swash plate piston pump.

[0075] In addition, in some preferred embodiments, one of the positioning structure 32 and the matching structure 12 is configured as a protrusion and the other is configured as a groove, and both the positioning structure 32 and the matching structure 12 are configured as spherical, so that the resistance of the thrust plate 3 when installed in the housing 1 or separated from the housing 1 can be reduced, thereby making the thrust plate 3 easier to assemble. Figure 2 and Figure 3 As shown, the positioning structure 32 is a spherical groove, and the matching structure 12 is a spherical protrusion; under this setting mode, the radius of the arc formed by the spherical groove on one side of the installation surface of the thrust plate 3 is larger than the radius of the arc formed by the spherical groove on the side of the working surface of the thrust plate 3 (i.e., the surface on the side of the thrust plate close to the plunger), so that when the thrust plate 3 is installed upside down, due to the smaller radius of the arc on the side of the working surface of the thrust plate 3, it will interfere with the spherical protrusion on the housing 1, thereby causing the thrust plate 3 to be unable to reach the assembly position, thereby strengthening the anti-reverse installation effect of the thrust plate 3. In other embodiments, the positioning structure 32 is a spherical protrusion, and the matching structure 12 is a spherical groove. Under this setting mode, the installation surface of the thrust plate 3 has a spherical protrusion, which increases the difference between the installation surface and the working surface of the thrust plate 3, thereby strengthening the anti-reverse installation effect of the thrust plate 3.

[0076] It should be understood that the above embodiments only take the positioning structure 32 and the matching structure 12 as examples in which both the positioning structure 32 and the matching structure 12 are set to be spherical, and exemplify the shapes of the positioning structure 32 and the matching structure 12 in the present application, but the present application is not limited to this. Exemplarily, the positioning structure 32 and the matching structure 12 can also be polygonal grooves and polygonal protrusions (for example, quadrilateral grooves and quadrilateral protrusions or pentagonal grooves and pentagonal protrusions) respectively; or, the positioning structure 32 and the matching structure 12 can also be U-shaped grooves and U-shaped protrusions respectively.

[0077] Furthermore, in some preferred embodiments, the multiple positioning structures 32 on the same thrust plate 3 are set to positioning structures 32 of different shapes and / or sizes, so that the positioning structure 32 can only match with the corresponding matching structure 12. When the thrust plate 3 is installed upside down, resulting in the multiple positioning structures 32 and the multiple matching structures 12 not being able to match according to the preset matching relationship (for example, the first positioning structure that matches the first matching structure needs to match the second matching structure because the thrust plate 3 is installed upside down), the thrust plate 3 will be unable to be installed to the assembly position due to the inconsistent shapes and / or sizes of the positioning structure 32 and the matching structure 12, thereby further strengthening the anti-reverse installation effect of the positioning structure 32. Exemplary:

[0078] In some embodiments, the plurality of positioning structures 32 on the same thrust plate 3 are a plurality of spherical grooves with different radii. The plurality of matching structures 12 on the inner wall of the housing 1 are spherical protrusions with sizes matching the spherical grooves.

[0079] In other embodiments, the plurality of positioning structures 32 on the same thrust plate 3 all include a first slot 322, and the shape of the first slot 322 is partially set as a spherical slot, and the other is set as a U-shaped slot. The plurality of matching structures 12 on the inner wall of the housing 1 are spherical protrusions and U-shaped protrusions whose sizes match the spherical slots.

[0080] 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.

[0081] The block diagrams of the devices, apparatuses, equipment, and systems 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 block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "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 words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0082] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0083] 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.

[0084] 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.

[0085] 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.

Claims

1. A swash plate type piston motor, characterized in that: include: case; A rotating assembly accommodated in the housing, the rotating assembly comprising a cylinder, a plunger disposed in a plunger hole of the cylinder, and a sliding shoe connected to the plunger; The thrust plate is obliquely arranged inside the shell, and includes a plate body and a plurality of positioning structures. The sliding shoe is in sliding contact with the plate body. The plurality of positioning structures are arranged on the edge of the plate body and are asymmetrically arranged about the center of the plate body in the circumferential direction of the plate body.

2. The swash plate type piston motor according to claim 1, characterized in that: The thrust plate is a powder metallurgy plate, and the same thrust plate includes the positioning structures of various shapes and / or sizes.

3. The swash plate type piston motor according to claim 1, characterized in that: The plate body is circular or elliptical, and the positioning structure includes: a radial protrusion, located on the circumferential edge of the plate body and protruding in a direction away from the center of the plate body; The first clamping groove is formed on the radial protrusion and is recessed from the protruding end of the protrusion toward the center of the plate body.

4. The swash plate type piston motor according to claim 1, characterized in that: The positioning structure is formed on the edge of the plate body and is a first groove that is recessed from the edge of the plate body toward the center of the plate body, and there is a gap between the sliding track of the sliding shoe on the plate body and the first groove.

5. The swash plate type piston motor according to claim 1, characterized in that: The positioning structure includes: a radial protrusion, which is located on the edge of the plate body and protrudes in a direction away from the center of the plate body; a first axial protrusion, which is arranged on the radial protrusion and protrudes axially relative to the mounting surface of the plate body; or, The positioning structure is a first axial protrusion that is arranged on the edge of the plate body and protrudes axially relative to the mounting surface of the plate body.

6. The swash plate type piston motor according to any one of claims 1 to 4, characterized in that: The grooves of all the positioning structures are spherical grooves. When the same thrust plate includes the positioning structures of various shapes or sizes, the radii of the spherical grooves of the positioning structures of different structures are different.

7. The swash plate type piston motor according to any one of claims 1 to 5, characterized in that: The multiple positioning structures only include a first positioning structure and a second positioning structure, and the distance between the first positioning structure and the center of the plate body is different from the distance between the second positioning structure and the center of the plate body, and / or the protruding or recessed size of the first positioning structure is different from the protruding or recessed size of the second positioning structure.

8. The swash plate type piston motor according to claim 7, characterized in that: On the edge of the plate body, an angle between a line connecting the center of the first positioning structure and the center of the plate body and a line connecting the center of the second positioning structure and the center of the plate body is α, and 165°≤α<180°.

9. The swash plate type piston motor according to claim 1, characterized in that: A plurality of mating structures that match the plurality of positioning structures of the thrust plate one-to-one are arranged on the inner wall of the shell. The mating structures can at least realize the circumferential positioning of the thrust plate in the shell by mating with the positioning structures. Both the mating structures and the positioning structures are formed in a non-material removal manner.

10. The swash plate type piston motor according to claim 9, characterized in that: The positioning structure includes: a radial protrusion located on the edge of the plate body and protruding in a direction away from the center of the plate body, and a first clamping groove formed on the radial protrusion and recessed from the protruding end of the protrusion toward the center of the plate body; the matching structure includes: a second axial protrusion protruding on the inner wall of the shell and capable of extending into the first clamping groove and matching with the first clamping groove; Alternatively, the positioning structure includes: a radial protrusion located on the edge of the plate body and protruding in a direction away from the center of the plate body, and a first axial protrusion arranged on the radial protrusion and protruding axially relative to the mounting surface of the plate body; the mating structure includes: a second groove formed on the inner wall of the shell and capable of allowing the first axial protrusion to extend into and cooperate with the first axial protrusion.

11. The swash plate type piston motor according to claim 10, characterized in that: One of the positioning structure and the matching structure is a spherical groove, and the other is a spherical protrusion.

12. The swash plate type piston motor according to claim 11, characterized in that: A center hole is provided at the center of the thrust plate to allow a center shaft to pass through, and the center shaft penetrates the housing in the axial direction.

13. A swash plate type plunger pump, characterized in that: include: case; A rotating assembly accommodated in the housing, the rotating assembly comprising a cylinder, a plunger disposed in a plunger hole of the cylinder, and a sliding shoe connected to the plunger; The thrust plate is obliquely arranged inside the shell, and includes a plate body and a plurality of positioning structures. The sliding shoe is in sliding contact with the plate body. The plurality of positioning structures are arranged on the edge of the plate body and are asymmetrically arranged about the center of the plate body in the circumferential direction of the plate body.

14. The swash plate type plunger pump according to claim 13, characterized in that: The thrust plate is a powder metallurgy plate, and the same thrust plate includes the positioning structures of various shapes and / or sizes.

15. The swash plate type plunger pump according to claim 13, characterized in that: The plate body is circular or elliptical, and the positioning structure includes: a radial protrusion, located on the circumferential edge of the plate body and protruding in a direction away from the center of the plate body; The first clamping groove is formed on the radial protrusion and is recessed from the protruding end of the protrusion toward the center of the plate body.

16. The swash plate type plunger pump according to claim 13, characterized in that: The positioning structure is formed on the edge of the plate body and is a first groove that is recessed from the edge of the plate body toward the center of the plate body, and there is a gap between the sliding track of the sliding shoe on the plate body and the first groove.

17. The swash plate type plunger pump according to claim 13, characterized in that: The positioning structure includes: a radial protrusion, which is located on the edge of the plate body and protrudes in a direction away from the center of the plate body; a first axial protrusion, which is arranged on the radial protrusion and protrudes axially relative to the mounting surface of the plate body; or, The positioning structure is a first axial protrusion that is arranged on the edge of the plate body and protrudes axially relative to the mounting surface of the plate body.

18. The swash plate type plunger pump according to any one of claims 13 to 16, characterized in that: The grooves of all the positioning structures are spherical grooves. When the same thrust plate includes the positioning structures of various shapes or sizes, the radii of the spherical grooves of the positioning structures of different structures are different.

19. The swash plate type plunger pump according to any one of claims 13 to 17, characterized in that: The multiple positioning structures only include a first positioning structure and a second positioning structure, and the distance between the first positioning structure and the center of the plate body is different from the distance between the second positioning structure and the center of the plate body, and / or the protruding or recessed size of the first positioning structure is different from the protruding or recessed size of the second positioning structure.

20. The swash plate type piston pump according to claim 19, characterized in that: On the edge of the plate body, an angle between a line connecting the center of the first positioning structure and the center of the plate body and a line connecting the center of the second positioning structure and the center of the plate body is α, and 165°≤α<180°.

21. The swash plate type plunger pump according to claim 13, characterized in that: A plurality of mating structures that match the plurality of positioning structures of the thrust plate one-to-one are arranged on the inner wall of the shell. The mating structures can at least realize the circumferential positioning of the thrust plate in the shell by mating with the positioning structures. Both the mating structures and the positioning structures are formed in a non-material removal manner.

22. The swash plate type plunger pump according to claim 21, characterized in that: The positioning structure includes: a radial protrusion located on the edge of the plate body and protruding in a direction away from the center of the plate body, and a first clamping groove formed on the radial protrusion and recessed from the protruding end of the protrusion toward the center of the plate body; the matching structure includes: a second axial protrusion protruding on the inner wall of the shell and capable of extending into the first clamping groove and matching with the first clamping groove; Alternatively, the positioning structure includes: a radial protrusion located on the edge of the plate body and protruding in a direction away from the center of the plate body, and a first axial protrusion arranged on the radial protrusion and protruding axially relative to the mounting surface of the plate body; the mating structure includes: a second groove formed on the inner wall of the shell and capable of allowing the first axial protrusion to extend into and cooperate with the first axial protrusion.

23. The swash plate type plunger pump according to claim 22, characterized in that: One of the positioning structure and the matching structure is a spherical groove, and the other is a spherical protrusion.

24. The swash plate type plunger pump according to claim 23, characterized in that: A center hole is provided at the center of the thrust plate to allow a center shaft to pass through, and the center shaft penetrates the housing in the axial direction.

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