Swash plate seat fixing device and plunger pump

Abstract

The utility model relates to the technical field of plunger pumps, in particular to a swash plate base fixing device and a plunger pump, the swash plate base fixing device comprises a swash plate base, a fixing piece and a shell, the shell forms a containing space used for containing the swash plate base, the swash plate base is provided with a first surface and a second surface which are far away from each other, the first surface is in contact with the shell, and the second surface is in contact with the shell. The shell is provided with at least two positioning holes, the axis of each positioning hole is perpendicular to the first surface, the number of the fixing pieces is at least two, any one of the fixing pieces corresponds to one of the pin holes in a one-to-one mode, and the fixing pieces penetrate through the pin holes and are fixedly connected with the positioning holes. The fixing piece and the swash plate base are in clearance fit, the fixing piece can close the positioning hole while locking the swash plate base and the shell, the vertically-arranged positioning hole can effectively prevent hydraulic oil from seeping from the position of the positioning hole, and the risk of oil seeping of the whole machine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a swash plate seat fixing device and a plunger pump. Background Art

[0002] The plunger pump is a crucial component of hydraulic systems. It relies on the reciprocating motion of the plunger within the cylinder, causing the volume of the sealed working chamber to change, achieving oil suction and pressure. During operation, the angle of the swash plate controls the output and supply of hydraulic oil within the plunger pump. During installation, the swash plate is secured to the housing via a swash plate seat. Existing swash plate seats are secured by radially threaded holes machined into the housing, which are then radially positioned and secured with bolts. However, these radially threaded holes can compromise the integrity of the housing, increasing the risk of oil leakage throughout the entire machine. Utility Model Content

[0003] The embodiment of the utility model discloses a swash plate seat fixing device and a plunger pump, which are used to reduce the risk of oil leakage of the entire machine.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] In a first aspect, the utility model provides a swash plate seat fixing device, comprising: a swash plate base, a fixing member, and a housing;

[0006] The housing is formed with a receiving space for receiving the swash plate base, the swash plate base having a first surface and a second surface that are away from each other, the first surface being in contact with the housing and parallel to a surface of the housing facing the swash plate base;

[0007] At least two positioning holes are formed on the housing, wherein the axis of each positioning hole is perpendicular to the first surface, and the swash plate base is provided with a pin hole corresponding to the positioning hole and passing through the swash plate base, and the pin hole corresponds to the positioning hole one by one;

[0008] The fixing members include at least two, any one of which corresponds to one of the pin holes. The fixing member passes through the pin hole and is fixedly connected to the positioning hole so that the fixing member is fixed to the housing, and there is a clearance fit between the fixing member and the swash plate base.

[0009] The present application provides at least two positioning holes on the outer shell, wherein the axis of each positioning hole is perpendicular to the first surface on the swash plate base, and the swash plate base and the outer shell body are planarly matched. Therefore, on this basis, when the outer shell and the swash plate base are installed and used, the positioning holes in the present application are arranged in the vertical direction on the outer shell. When the fixing part is installed on the outer shell, the fixing part will seal the positioning holes provided on the outer shell. The vertically arranged positioning holes can effectively prevent hydraulic oil from leaking from the positioning hole position, thereby reducing the risk of oil leakage in the entire machine.

[0010] In addition, the fixing part and the swash plate base in the present application adopt a clearance fit method, so that the swash plate base has a certain movement space, and when the swash plate base is working, this part of the movement space can release the small displacement of the swash plate base, making the fitting structure more reliable.

[0011] In some embodiments, the swash plate seat fixing device further comprises a swash plate body, a guide surface is provided on a side of the swash plate body facing the swash plate base, and the guide surface is provided corresponding to the second surface.

[0012] In some embodiments, the guide surface is an arc surface with an opening direction facing away from the swash plate base, and the second surface is an arc surface with an opening direction facing the swash plate body.

[0013] In some embodiments, the fixing member has a front end portion, a middle end portion and a tail end portion connected in sequence, wherein the size of the tail end portion along a first direction is larger than the size of the middle end portion, the first direction is perpendicular to the axis of the positioning hole, and the size of the middle end portion along the first direction is larger than the size of the tail end portion.

[0014] In some embodiments, when the fixing member locks the swash plate base and the housing, the front end portion is located inside the positioning hole and is threadedly connected thereto, the middle end portion is located inside the pin hole and is gapped with the pin hole, and the tail end portion has a stop surface facing the swash plate base, the size of the stop surface is larger than the size of the positioning hole, and there is a gap between the stop surface and the swash plate base.

[0015] In some embodiments, the stop surface is parallel to a surface of the swash plate base facing the stop surface.

[0016] In some embodiments, the axis of the middle end portion is perpendicular to the stop surface.

[0017] In some embodiments, the securing member comprises a bolt pin.

[0018] In some embodiments, the positioning holes include at least three, wherein each of the positioning holes is arranged in a ring shape around the axis of the shell body, and at least two of the positioning holes are symmetrically arranged around the axis of the shell body.

[0019] In a second aspect, the present application further provides a plunger pump comprising a swash plate seat fixing device as described in any one of the above items and a plunger pump body, wherein the swash plate seat fixing device is in communication with the plunger pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of the slant plate seat fixing device provided in an embodiment of the present utility model;

[0021] Figure 2 A schematic diagram of the bolt pin structure provided by an embodiment of the utility model;

[0022] Figure 3 This is a partial structural diagram of the cooperation between the bolt pin and the swash plate base provided in an embodiment of the utility model.

[0023] In the figure: 1-swash plate body, 11-guide surface, 2-swash plate base, 22-first surface, 21-second surface, 3-bolt pin, 31-front end portion, 311-stop surface, 32-middle end portion, 33-tail end portion, 4-housing, 5-positioning hole, 6-pin hole. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two.

[0025] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0026] The embodiment of the utility model discloses a swash plate seat fixing device and a plunger pump, which are used to reduce the risk of oil leakage of the entire machine.

[0027] To achieve the above objectives, the present invention provides the following technical solutions:

[0028] Please refer to Figure 1 In a first aspect, the present invention provides a swash plate seat fixing device, comprising: a swash plate base 2, a fixing member, and a housing 4;

[0029] The housing 4 is formed with an accommodating space for accommodating the swash plate base 2. The swash plate base 2 has a first surface 22 and a second surface 21 that are spaced apart from each other. The first surface 22 contacts the housing 4 and is parallel to the surface of the housing 4 facing the swash plate base 2.

[0030] At least two positioning holes 5 are formed on the housing 4, wherein the axis of each positioning hole 5 is perpendicular to the first surface 22, and the swash plate base 2 is provided with a pin hole 6 corresponding to the positioning hole 5 and penetrating the swash plate base 2, and the pin hole 6 corresponds to the positioning hole 5 one by one;

[0031] There are at least two fixing members, each of which corresponds to one of the pin holes 6. The fixing member passes through the pin hole 6 and is fixedly connected to the positioning hole 5 so that the fixing member is fixed to the housing 4 and has a clearance fit with the swash plate base 2.

[0032] In the present application, at least two positioning holes 5 are provided on the housing 4, wherein the axis of each positioning hole 5 is perpendicular to the first surface 22 on the swash plate base 2, and the swash plate base 2 and the main body of the housing 4 are planarly matched. Therefore, on this basis, when the housing 4 and the swash plate base 2 are installed and used, the positioning holes 5 in the present application are arranged in the vertical direction on the housing 4. While the fixing member locks the swash plate base 2 and the housing 4, the fixing member can also close the positioning holes 5. The vertically arranged positioning holes 5 can effectively prevent hydraulic oil from leaking from the positioning holes 5, thereby reducing the risk of oil leakage in the entire machine.

[0033] In addition, the fixing member in the present application is fitted with the swash plate base 2 in a clearance manner, so that the swash plate base 2 has a certain movement space. When the swash plate base 2 is working, this part of the movement space can release the small displacement of the swash plate base 2, making the fitting structure more reliable.

[0034] For further information, please refer to Figure 1 The swash plate seat fixing device also includes a swash plate body 1. A guide surface 11 is provided on the side of the swash plate body 1 facing the swash plate base 2. The guide surface 11 is provided corresponding to the second surface 21. As shown in the figure, the present application is also provided with a swash plate body 1. When the swash plate body 1 is in actual use, the guide surface 11 of the swash plate body 1 will cooperate with the second surface 21 to enable the swash plate body 1 to move relative to the swash plate base 2, thereby enabling the swash plate body 1 to control the oil pressure feed of the plunger pump body.

[0035] Furthermore, the guide surface 11 is an arcuate surface with its opening facing away from the swash plate base 2, and the second surface 21 is an arcuate surface with its opening facing toward the swash plate body 1. In the above-described structure, the guide surface 11 in the present application is an arcuate surface, and specifically, the guide surface 11 may be a semi-cylindrical surface, with a semi-circular hole formed on the second surface 21. During actual use of the present application, the swash plate base 2 cooperates with the housing 4, the large flat surface of the swash plate body 1 is used to support the rotational movement of the sliding shoe, and the swash plate base 2 is used to support the swash plate body 1. The cooperation of the semi-circular surfaces enables the swash plate body 1 to swing back and forth, thereby achieving a change in the inclination angle of the swash plate body 1. By changing the inclination angle of the swash plate body 1, the variable function of the plunger pump body is realized, and the flow rate of hydraulic oil required for the output of the plunger pump body is more accurately controlled.

[0036] For further information, please refer to Figure 2 、 Figure 3 The fixing member has a front end portion 31, a middle end portion 32 and a tail end portion 33 connected in sequence, wherein the size of the tail end portion 33 along the first direction is larger than the size of the middle end portion 32, the first direction is perpendicular to the axis of the positioning hole 5, and the size of the middle end portion 32 along the first direction is larger than the size of the tail end portion 33. In the above structure, the front end portion 31, the middle end portion 32 and the tail end portion 33 in the present application respectively adopt different sizes, and the overall appearance of the bolt pin 3 is continuously reduced in size at one end. The present application adopts the above design. First, the smaller front end portion 31 can make the size of the positioning hole 5 matched with it smaller, and the smaller the positioning hole 5, the lower the risk of oil leakage. The slightly larger middle end portion 32 can ensure the overall structural strength of the bolt pin 3 and ensure the overall use effect of the bolt pin 3. In addition, the largest tail end portion 33 is used to limit the maximum movement distance of the swash plate base 2, ensuring that the swash plate base 2 can be stably installed on the housing 4, indicating the overall stability of the structure of the present application.

[0037] For further information, please refer to Figure 1 、 Figure 2 When the fixing member locks the swash plate base 2 and the housing 4, the front end portion 31 is located in the positioning hole 5 and is threadedly connected thereto, the middle end portion 32 is located in the pin hole 6 and is loosely engaged with the pin hole 6, and the tail end portion 33 has a stop surface 311 facing the swash plate base 2. The size of the stop surface 311 is larger than the size of the positioning hole 5, and there is a gap between the stop surface 311 and the swash plate base 2. In the above structure, the positioning hole 5 in the present application is only used to accommodate the tail end portion 33, while the pin hole 6 and the middle end portion 32 are loosely engaged, and the stop surface 311 has a gap between the swash plate base 2. The gaps between these two parts can prevent abnormal wear between the swash plate base 2 and the swash plate body 1 due to overconstraint. Therefore, when the swash plate body 1 moves relative to the swash plate base 2, slight displacement between the two can be relieved and buffered, making the fitting structure more reliable.

[0038] As a result, when the swash plate body 1 moves relative to the swash plate base 2 , a slight displacement of the swash plate base 2 can be released, making the fitting structure more reliable.

[0039] For further information, please refer to Figure 1 、 Figure 2 The stop surface 311 is parallel to the surface of the swash plate base 2 facing the stop surface 311. In the present application, the tail end portion 33 of the bolt pin 3 is arranged to be in plane fit with the swash plate base 2. On the one hand, the installation space of the tail end portion 33 can be reduced. On the other hand, the plane-fitting tail end portion 33 and the swash plate base 2 can effectively limit the maximum movement distance of the swash plate base 2 in the vertical direction, thereby ensuring the stability of the installation of the swash plate base 2 and the housing 4.

[0040] For further information, please refer to Figure 1 、 Figure 2 The axis of the middle end portion 32 is perpendicular to the stop surface 311. In the above structure, the axis of the middle end portion 32 in this application is perpendicular to the stop surface 311, that is, the middle end portion 32 and the tail end portion 33 are arranged vertically to ensure the overall use effect of the bolt pin 3.

[0041] Furthermore (not shown in the figure), the positioning holes 5 include at least three, each of which is arranged in a ring around the axis of the shell 4 body, and at least two positioning holes 5 are symmetrically arranged around the axis of the shell 4 body. In the above structure, the positioning holes 5 in this application can also be at least three, and the specific number can be changed according to actual needs. This application does not make specific restrictions on this. It is only necessary to ensure that at least two positioning holes 5 are symmetrically arranged around the axis of the shell 4 body to ensure that after the bolt pin 3 is installed, there is no shaking between the swash plate base 2 and the shell 4, thereby ensuring the stability of the installation of the swash plate base 2 and the shell 4.

[0042] On the second aspect, the present application also provides a plunger pump, including a swash plate seat fixing device and a plunger pump body as described above. The swash plate seat fixing device is connected to the plunger pump body. When used, the present application needs to be used in conjunction with the plunger pump. At the same time, by changing the inclination angle of the swash plate body 1, the variable function of the plunger pump body is realized, and the flow rate of the hydraulic oil required for the output of the plunger pump body is more accurately controlled.

[0043] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A swash plate seat fixing device, characterized in that: include: Swash plate base, fixings, and housing; The housing is formed with a receiving space for receiving the swash plate base, the swash plate base has a first surface and a second surface that are away from each other, the first surface is in contact with the housing, and the first surface is parallel to a surface of the housing facing the swash plate base; At least two positioning holes are formed on the housing, wherein the axis of each positioning hole is perpendicular to the first surface, and the swash plate base is provided with a pin hole corresponding to the positioning hole and penetrating the swash plate base, and the pin hole corresponds to the positioning hole one by one; The fixing members include at least two, any one of which corresponds to one of the pin holes, and the fixing member passes through the pin hole and is fixedly connected to the positioning hole so that the fixing member is fixed to the housing, and there is a clearance fit between the fixing member and the swash plate base.

2. The swash plate seat fixing device according to claim 1, characterized in that: The swash plate seat fixing device further comprises a swash plate body, a guide surface is arranged on a side of the swash plate body facing the swash plate base, and the guide surface is arranged corresponding to the second surface.

3. The swash plate seat fixing device according to claim 2, characterized in that: The guide surface is an arc surface with an opening direction away from the swash plate base, and the second surface is an arc surface with an opening direction toward the swash plate body.

4. The swash plate seat fixing device according to claim 1, characterized in that: The fixing member has a front end portion, a middle end portion and a tail end portion connected in sequence, wherein the size of the tail end portion along a first direction is larger than the size of the middle end portion, the first direction is perpendicular to the axis of the positioning hole, and the size of the middle end portion along the first direction is larger than the size of the tail end portion.

5. The swash plate seat fixing device according to claim 4, characterized in that: When the fixing member locks the swash plate base and the housing, the front end portion is located inside the positioning hole and is threadedly connected thereto, the middle end portion is located inside the pin hole and is gap-matched with the pin hole, and the tail end portion has a stop surface facing the swash plate base, the size of the stop surface is larger than the size of the positioning hole, and there is a gap between the stop surface and the swash plate base.

6. The swash plate seat fixing device according to claim 5, characterized in that: The stop surface is parallel to a surface of the swash plate base facing the stop surface.

7. The swash plate seat fixing device according to claim 6, characterized in that: The axis of the middle end portion is perpendicular to the stop surface.

8. The swash plate seat fixing device according to claim 1, characterized in that: The fixing member includes a bolt pin.

9. The swash plate seat fixing device according to claim 1, characterized in that: The positioning holes include at least three, wherein each of the positioning holes is arranged in a ring shape around the axis of the shell body, and at least two of the positioning holes are symmetrically arranged around the axis of the shell body.

10. A plunger pump, characterized in that: It comprises a swash plate seat fixing device and a plunger pump body as described in any one of claims 1 to 9, wherein the swash plate seat fixing device is connected to the plunger pump body.

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