Displacement adjusting structure assembly and hydraulic motor thereof

Abstract

The utility model relates to the technical field of hydraulic pressure, in particular to a displacement adjusting structure assembly and a hydraulic motor thereof. A displacement adjusting structure assembly is used for a hydraulic motor and comprises a supporting frame, a displacement adjusting assembly and a displacement adjusting assembly, and the supporting frame can replace a rear cover of the hydraulic motor to be assembled on a shell of the hydraulic motor when the motor is assembled; the supporting rod is assembled on the supporting frame in a threaded mode, the end of the supporting rod abuts against a valve plate in the hydraulic motor, and the supporting rod can push the valve plate to move so as to eliminate the assembling clearance; and the number of the screws is at least two, and the at least two screws lock the position of the valve plate of the hydraulic motor. The technical problem that in the prior art, a hydraulic variable displacement motor cannot be limited at the fixed displacement to be used as a hydraulic constant displacement motor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pressure, in particular to a displacement adjustment structural component and a hydraulic motor thereof. Background Art

[0002] Hydraulic piston motors are high-end hydraulic components, mainly used in vehicles and engineering machinery, metallurgical machinery, machine tools and other equipment. The piston motor converts the liquid pressure energy provided by the hydraulic pump into the mechanical energy of the output shaft. Among them, hydraulic piston motors can be divided into hydraulic variable motors and hydraulic fixed motors according to whether their displacement can be changed. The cylinder body, plunger, valve plate and main shaft are the main rotating parts of the piston motor.

[0003] For example, the document with application number CN201820764377.8 discloses a spherical static pressure drive structure and an inclined axis plunger pump or motor including the structure, and specifically discloses that the inclined axis plunger pump or motor includes a driving spindle, a bearing, a housing, a liner, a driving disc, a pressure plate, a plunger, a cylinder body, a central shaft, and a distribution plate. The axis of the driving spindle is at a certain angle to the axis of the central shaft, and the driving spindle is supported on the housing via a bearing with one end arranged inside the housing and capable of rotating around its own axis. The other end face of the driving spindle is coaxially connected to the driving disc, and a plurality of plunger support ball sockets and a central shaft support ball socket are arranged on the end face of the driving disc facing the cylinder body. The plunger support ball sockets are evenly spaced on the end face of the driving disc with a common circumference centered on the axis of the driving spindle, and the plunger support ball sockets and the central shaft support ball sockets are respectively connected with the plunger ball head and the central shaft ball head in a sliding fit state in which they can tilt relative to the central axis of the driving spindle. The cylinder body is slidably arranged in the shell via a central axis and a plurality of plungers arranged around the central axis. When used as a bent axis plunger pump, a prime mover (not shown, such as an electric motor, an internal combustion engine, etc.) drives the driving spindle to rotate, and the driving spindle drives the cylinder body to rotate via a driving plate and a plunger, and causes the plunger to reciprocate in the cylinder body, thereby realizing the pump's oil suction and discharge operations.

[0004] Due to the structure of the hydraulic variable motor itself, it is impossible to limit it to a certain fixed displacement for use as a hydraulic fixed displacement motor, which greatly limits the scope and conditions of use of the variable motor. Utility Model Content

[0005] In order to solve the technical problem in the prior art that the hydraulic variable motor cannot be limited to a fixed displacement for use as a hydraulic fixed displacement motor, the utility model provides a displacement adjustment structural component and a hydraulic motor thereof, which solve the above technical problem.

[0006] In order to solve the above technical problems, the utility model provides a displacement adjustment structure assembly for a hydraulic motor, comprising:

[0007] A support frame, which can replace the rear cover of the hydraulic motor and be assembled on the housing of the hydraulic motor when the motor is assembled;

[0008] A support rod, wherein the support rod is threadedly mounted on the support frame, and an end of the support rod abuts against a distribution plate in the hydraulic motor, and the support rod can push the distribution plate to move to eliminate an assembly gap;

[0009] Screws, there are at least two screws, and at least two screws lock the position of the valve plate of the hydraulic motor.

[0010] According to an embodiment of the utility model, the support rod is in spherical contact with the distribution plate of the hydraulic motor.

[0011] According to an embodiment of the utility model, at least part of the circumferential surface of one end of the support rod close to the distribution disk is a first spherical surface; a through hole is opened in the center of the distribution disk, and the inner circumferential surface of the through hole close to one end of the support rod is a second spherical surface.

[0012] According to an embodiment of the utility model, at least two threaded holes are formed on the support frame, and the threaded holes are arranged in a line. The support rod is assembled in different threaded holes to limit different fixed displacements.

[0013] According to an embodiment of the utility model, a groove is formed in the middle of the support frame, connecting parts extend on both sides of the groove opening, the connecting parts are used to connect to the housing of the hydraulic motor, and the side walls of the groove are matching surfaces of the distribution plate.

[0014] According to an embodiment of the utility model, there are two screws, and the two screws are assembled on the housing of the hydraulic motor.

[0015] The utility model also provides a hydraulic motor, comprising:

[0016] case;

[0017] a main shaft, the main shaft being assembled on the housing;

[0018] A cylinder body, the cylinder body is assembled in the housing, and the cylinder body is connected and matched with the main shaft through a center rod and a plunger;

[0019] A distribution plate, the distribution plate is pressed against the bottom end surface of the cylinder body away from the main shaft;

[0020] A displacement adjustment structural assembly, wherein the support frame is assembled on the housing, and the support rod rotates along the support frame to push the distribution plate and the cylinder body to be assembled in place;

[0021] After the rear cover, the cylinder body and the distribution plate are assembled in place, the support frame is removed and the rear cover is assembled to the shell.

[0022] According to one embodiment of the utility model, a center hole is formed on the cylinder body, one end of the center rod is connected to the main shaft, the other end of the center rod extends into the center hole, a gasket is arranged in the center hole, the two ends of the elastic member act on the center rod and the gasket respectively, and the support rod pushes the distribution plate and the cylinder body to adjust the gap between the end face of the center rod and the gasket.

[0023] According to an embodiment of the utility model, the screw thread is assembled on the housing and is locked by a nut.

[0024] According to an embodiment of the present utility model, the cylinder body is inclined relative to the main shaft.

[0025] Based on the above technical solution, the technical effects that can be achieved by the utility model are:

[0026] 1. The displacement adjustment structural assembly of the utility model includes a support frame, a support rod and a screw. The support frame can be fixed on the housing of the hydraulic motor. The support rod is threadedly assembled on the support frame. The support rod can rotate along the support frame while pushing the distribution plate to move to eliminate the assembly gap, and the distribution plate is positioned to a certain fixed displacement position. Then, the screw can lock the position of the distribution plate, so that the hydraulic motor is limited to a certain fixed displacement and used as a quantitative motor, thereby expanding the use range of the variable motor;

[0027] 2. The displacement adjustment structural assembly of the utility model is provided with spherical contact between the support rod and the valve plate of the hydraulic motor. The support rod can be assembled in any threaded hole on the support frame and can be in surface contact with the valve plate, which facilitates the adjustment of the valve plate by the support rod;

[0028] 3. The displacement adjustment structural assembly of the utility model has at least two threaded holes arranged on the support frame, and the threaded holes are arranged in a line. When the support rod is assembled in different threaded holes, different fixed displacements can be defined, and multiple fixed displacements can be set;

[0029] 4. In the displacement adjustment structural assembly of the utility model, the side walls of the groove of the support frame are the matching surfaces of the distribution plate, which can limit the distribution plate so that the distribution plate is offset only in the displacement adjustment direction;

[0030] 5. The hydraulic motor of the utility model adopts the aforementioned displacement adjustment structural assembly. The support rod can push the distribution plate and the cylinder body toward the main shaft to press it, and adjust the gap between the end face of the center rod and the gasket. After the adjustment is in place, the position of the distribution plate is locked by screws, the displacement adjustment structural assembly is removed, and the rear cover is assembled to complete the adjustment from the variable motor to the fixed motor. The operation is convenient and the use range of the hydraulic motor is expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a cross-sectional view of the displacement adjustment structural assembly of the utility model being assembled on the hydraulic motor housing;

[0032] Figure 2 A three-dimensional diagram of the displacement adjustment structural assembly being assembled on the hydraulic motor housing;

[0033] Figure 3 for Figure 2 The structure shown is in another viewing angle;

[0034] Figure 4 for Figure 2 The structure shown is at yet another viewing angle;

[0035] Figure 5 is the main view of the support frame;

[0036] Figure 6 is a top view of the support frame;

[0037] Figure 7 for Figure 6 AA section view;

[0038] Figure 8 It is the front view of the support rod;

[0039] Fig. 9 is a cross-sectional view of the support rod;

[0040] Fig.10 is the front view of the screw;

[0041] Fig.11 for Fig.10 BB cross-sectional view;

[0042] Fig.12 is a cross-sectional view of the shell;

[0043] Figure 13-15 The adjustment process of a hydraulic motor from a variable motor to a fixed motor.

[0044] In the figure: 1-support frame; 11-threaded hole; 12-connecting part; 121-connecting hole; 13-matching surface of distribution plate; 2-support rod; 21-head; 211-first spherical surface; 22-first external thread; 23-first inner hole; 3-screw; 31-nut; 32-second external thread; 33-front end face; 34-annular groove; 35-second inner hole; 4-housing; 41-threaded hole; 5-distribution plate; 6-spindle; 7-cylinder body; 8-center rod; 9-plunger; 10-gasket; 20-rear cover. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0048] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0050] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0051] like Figure 1-15 As shown, this embodiment provides a displacement adjustment structural component for adjusting the displacement of the hydraulic motor, the displacement adjustment structural component includes a support frame 1, a support rod 2 and a screw 3, the support frame 1 can be fixed on the housing 4 of the hydraulic motor, the support rod 2 is threadedly assembled on the support frame 1, the end of the support rod 2 is against the distribution plate 5 of the hydraulic motor, and the support rod 2 is rotated to enable the support rod 2 to push the distribution plate 5 to move to eliminate the assembly gap. When the distribution plate 5 and the cylinder body on one side of the distribution plate 5 are assembled in place, the distribution plate 5 is locked by the screw 3, and then the support frame 1 is removed, and the rear cover 20 is assembled, and the variable hydraulic motor is adjusted to a fixed hydraulic motor.

[0052] A through groove is formed in the middle of the support frame 1, and a threaded hole 11 is provided at the bottom of the groove of the support frame 1. Connecting parts 12 extend on both sides of the opening of the groove of the support frame 1. The connecting parts 12 are used to connect with the housing 4 of the hydraulic motor. The side walls of the groove are the distribution plate mating surfaces 13.

[0053] As a preferred technical solution of this embodiment, there are at least two threaded holes 11, all of which are arranged in a line, and the support rod 2 is threadedly assembled in the threaded holes 11. The support rod 2 assembled in different threaded holes 11 can limit different fixed displacements.

[0054] As a preferred technical solution of this embodiment, the two connecting parts 12 are located on the same plane, and connecting holes 121 are distributed on the connecting parts 12. When assembled, the connecting holes 121 can be directly opposite to the assembly holes on the shell 4 that are assembled with the back cover 20. In this way, the support frame 1 can be fixed on the shell 4 without opening additional holes. Preferably, at least two connecting holes 121 are set on each connecting part 12.

[0055] As the preferred technical solution of this embodiment, the two distribution plate mating surfaces 13 of the support frame 1 are parallel, and the two distribution plate mating surfaces 13 are perpendicular to the bottom surface of the groove of the support frame 1. When the displacement is adjusted, the distribution plate 5 is located between the two distribution plate mating surfaces 13, and the two side surfaces of the distribution plate 5 are slidably matched with the two distribution plate mating surfaces 13, and the distribution plate 5 slides between the two distribution plate mating surfaces 13.

[0056] The support rod 2 is threadedly assembled in the threaded hole 11 of the support frame 1. A first external thread 22 is formed on the outer circumferential surface of the rod body of the support rod 2. A head 21 is formed at one end of the rod body. At least part of the circumferential surface of the head 21 is a first spherical surface 211. The first spherical surface 211 abuts against the distribution plate 5 and is spherically matched with the distribution plate 5.

[0057] As a preferred technical solution of this embodiment, a first inner hole 23 is provided at the other end of the support rod 2 away from the head 21. The first inner hole 23 may be, but is not limited to, a hexagonal hole, which facilitates the tool to extend into the first inner hole 23 to drive the support rod 2 to rotate.

[0058] The screws 3 are assembled on the housing 4 of the hydraulic motor. There are at least two screws 3 , and at least two screws 3 can cooperate to lock the position of the port plate 5 .

[0059] As a preferred technical solution of this embodiment, there are two screws 3, and the two screws 3 are assembled on the housing 4 to lock the distribution plate 5 from two opposite directions.

[0060] As a preferred technical solution of this embodiment, the outer peripheral surface of the screw 3 is distributed with a second external thread 32, which is assembled on the housing 4 with a thread. The screw 3 can be rotated to adjust the position of the screw 3 on the housing 4. After being adjusted to the right position, the screw 3 is locked with a nut 31. The front end of the screw 3 has a front end face 33. When locked, the front end face 33 abuts against the distribution plate 5. An annular groove 34 is formed between the second external thread 32 and the front end. The annular groove 34 and the front end are transitioned through a conical surface. The annular groove 34 and one side of the second external thread 32 are also transitioned through a conical surface. The rear end of the screw 3 is formed with a second inner hole 35. The second inner hole 35 can be selected but not limited to a hexagonal hole, so that the tool can be inserted into the second inner hole 35 to drive the screw 3 to rotate.

[0061] This embodiment also provides a hydraulic motor, including a housing 4, a main shaft 6, a cylinder body 7, a distribution plate 5 and a rear cover 20. The main shaft 6 is assembled on the housing 4, and the cylinder body 7 is rotatably assembled in the housing 4. The cylinder body 7 and the main shaft 6 are connected and matched through a center rod 8 and a plunger 9. The bottom end face of the cylinder body 7 away from the main shaft 6 is provided with a distribution plate 5. The support rod 2 in the displacement adjustment structure assembly is against the distribution plate 5, and the distribution plate 5 and the cylinder body 7 are pressed toward the main shaft 6 to adjust the assembly gap. When the position of the distribution plate 5 is adjusted to the right position, the screw 3 locks the position of the distribution plate 5, and then the support frame 1 and the support rod 2 thereon are removed, and the rear cover 20 is assembled to complete the adjustment of the hydraulic motor to a fixed displacement motor.

[0062] The shell 4 is a hollow structure with one end open. Screw holes 41 are arranged on the side walls of the shell 4. The screws 3 are assembled in the screw holes 41. One end of the main shaft 6 is rotatably assembled in the shell 4, and the other end of the main shaft 6 extends out of the shell 4.

[0063] The cylinder body 7 is located in the housing 4, and the cylinder body 7 is inclined relative to the main shaft 6. A center hole is formed in the center of the cylinder body 7, one end of the center rod 8 is connected to the ball head of the main shaft 6, and the other end of the center rod 8 extends into the center hole. A gasket 10 is arranged at the bottom of the center hole, and an elastic member is arranged between the center rod 8 and the gasket 10, and the two ends of the elastic member act on the center rod 8 and the gasket 10 respectively. A plurality of plunger holes are also arranged on the cylinder body 7, and the plurality of plunger holes are evenly distributed circumferentially on the outer periphery of the center hole. One end of the plunger 9 is connected to the ball head of the main shaft 6, and the other end of the plunger 9 extends into the plunger hole and slides along the plunger hole.

[0064] As a preferred technical solution of this embodiment, a hole is formed at one end of the center rod 8 close to the gasket 10, and the elastic member can be at least partially built into the hole of the center rod 8. Before adjustment, under the action of the elastic member, there is a gap D between the end face of the center rod 8 and the gasket 10. During adjustment, the distribution plate 5 is pushed by the support rod 2, and the distribution plate 5 pushes the cylinder body 7. The gap D can be adjusted to achieve the assembly of the cylinder body 7.

[0065] The distribution plate 5 presses the bottom end surface of the cylinder body 7, and a through hole is formed in the center of the distribution plate 5. The inner circumference of the through hole at one end away from the cylinder body 7 is a second spherical surface. The head 21 of the support rod 2 can extend into the through hole, and the first spherical surface 211 can abut against the second spherical surface.

[0066] Based on the above structure, the steps for adjusting the hydraulic motor in this embodiment are:

[0067] like Fig.13As shown, in the initial state, the two screws 3 are not in contact with the distribution plate 5, and the cylinder body 7 is subjected to the force of the elastic member, and a gap D is maintained with the end face of the center rod 8. Since the force of the elastic member is large, when adjusting, the support frame 1 needs to be fixed to the housing 4, and the support rod 2 is threadedly assembled in the threaded hole 11 of the support frame 1. The tool extends into the first inner hole 23 of the support rod 2, driving the support rod 2 to rotate and press against the distribution plate 5;

[0068] like Fig.14 As shown, the support rod 2 is screwed into the support frame 1 for a certain distance, pushing the distribution plate 5 and the cylinder body 7 to move toward the main shaft 6, adjusting the gap D between the center rod 8 and the gasket 10. After the adjustment is in place, the support rod 2 is stopped from rotating, and the two screws 3 are screwed in at this time to restrict the upper and lower surfaces of the distribution plate 5 respectively, and finally the distribution plate 5 and the cylinder body 7 are fixed at a certain angle;

[0069] like Fig.15 As shown, the support frame 1 and the support rod 2 are removed, and the rear cover 20 is assembled to achieve the function of the hydraulic variable motor turning into a fixed quantity motor. The assembly process is very simple and the assembly efficiency is high.

[0070] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A displacement adjustment structural assembly for a hydraulic motor, characterized in that: include: A support frame (1), wherein the support frame (1) can replace a rear cover (20) of a hydraulic motor and be assembled on a housing (4) of the hydraulic motor when the motor is assembled; A support rod (2), wherein the support rod (2) is threadedly mounted on the support frame (1), and an end of the support rod (2) abuts against a distribution plate (5) in the hydraulic motor, and the support rod (2) can push the distribution plate (5) to move to eliminate assembly clearance; Screws (3), there are at least two screws (3), and at least two screws (3) lock the position of the valve plate (5) of the hydraulic motor.

2. A displacement adjustment structural assembly according to claim 1, characterized in that: The support rod (2) is in spherical contact with the distribution plate (5) of the hydraulic motor.

3. A displacement adjustment structural assembly according to claim 2, characterized in that: At least part of the circumferential surface of one end of the support rod (2) close to the distribution plate (5) is a first spherical surface (211); a through hole is opened at the center of the distribution plate (5), and the inner circumferential surface of the through hole close to one end of the support rod (2) is a second spherical surface.

4. A displacement adjustment structural assembly according to claim 1, characterized in that: At least two threaded holes (11) are formed on the support frame (1), the threaded holes (11) are arranged in a line, and the support rod (2) is assembled in different threaded holes (11) to define different fixed displacements.

5. A displacement adjustment structural assembly according to claim 4, characterized in that: A groove is formed in the middle of the support frame (1), and connecting parts (12) extend from both sides of the groove opening. The connecting parts (12) are used to connect to the housing (4) of the hydraulic motor, and the side walls of the groove are distribution plate matching surfaces (13).

6. A displacement adjustment structural assembly according to claim 1, characterized in that: There are two screws (3), and the two screws (3) are assembled on the housing (4) of the hydraulic motor.

7. A hydraulic motor, characterized in that: include: Housing (4); A main shaft (6), wherein the main shaft (6) is assembled on the housing (4); A cylinder body (7), the cylinder body (7) is assembled in the housing (4), and the cylinder body (7) is connected and matched with the main shaft (6) via a center rod (8) and a plunger (9); A distribution plate (5), the distribution plate (5) being pressed against a bottom end surface of the cylinder body (7) away from the main shaft (6); The displacement adjustment structure assembly according to any one of claims 1 to 6, wherein the support frame (1) is mounted on the housing (4), and the support rod (2) rotates along the support frame (1) to push the distribution plate (5) and the cylinder body (7) into place; After the rear cover (20), the cylinder body (7) and the distribution plate (5) are assembled in place, the support frame (1) is removed and the rear cover (20) is assembled onto the housing (4).

8. A hydraulic motor according to claim 7, characterized in that: A center hole is formed on the cylinder body (7), one end of the center rod is connected to the main shaft (6), the other end of the center rod (8) extends into the center hole, a gasket (10) is arranged in the center hole, the two ends of the elastic member act on the center rod (8) and the gasket (10) respectively, and the support rod (2) pushes the distribution plate (5) and the cylinder body (7) to adjust the gap between the end face of the center rod (8) and the gasket (10).

9. A hydraulic motor according to claim 8, characterized in that: The screw (3) is threadedly assembled on the housing (4) and is locked by a nut (31).

10. A hydraulic motor according to claim 7, characterized in that: The cylinder body (7) is inclined relative to the main shaft (6).

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