Mounting structure of swash plate and plunger pump

Abstract

The utility model relates to a swash plate and plunger pump mounting structure which comprises a swash plate, a plunger pump and a crescent bearing mounted between the swash plate and the plunger pump, the upper end of a crescent holder extends upwards to form a mounting seat, an assembly groove is longitudinally formed in the mounting seat, a connecting pin is arranged on the assembly groove in a matched mode, and the connecting pin is inserted into the mounting seat. A connecting hole is formed in the connecting pin in a penetrating mode in the diameter direction of the connecting pin, and a swing window and a swing opening which are communicated with the assembling groove are formed in the two sides of the mounting base; the mounting structure further comprises a connecting shaft, the connecting shaft is in an L shape and comprises a long shaft and a short shaft, the end of the long shaft penetrates through the connecting hole along the swing opening and extends out of the swing window to be connected with an opponent piece of the plunger pump, and the short shaft is connected with the swash plate. According to the scheme, the connecting shaft is L-shaped, the long shaft of the connecting shaft penetrates through the connecting pin, and then the two sides of the connecting shaft are connected with the plunger pump and the swash plate respectively, so that the crescent holder and the L-shaped connecting shaft are very convenient to machine and assemble.

Description

Technical Field

[0001] The utility model relates to the field of engineering technology, in particular to an installation structure of a swash plate and a plunger pump. Background Art

[0002] The crescent bearing is an element connecting the swash plate and the pump body, which plays a role in reducing the friction coefficient between the swash plate and the pump body and enabling smooth rotation. The crescent bearing, the swash plate and the pump body are usually connected by a lever or a connecting shaft. For example, a Chinese utility model with the publication number CN207500069U

[0003] relates to a swash plate installation mechanism of an inclined plunger pump, including a plunger pump body. A crescent outer ring is fixedly installed on the plunger pump body. A crescent bearing capable of moving up and down along the inner curved surface of the crescent outer ring is arranged inside the crescent outer ring. The swash plate of the plunger pump is arranged on the crescent bearing. It is convenient to adjust the inclination angle of the swash plate on the plunger pump. A lever includes a rod body. An upper ball head for rotatably cooperating with the swash plate is arranged at the upper end of the rod body. A lower ball head for rotatably cooperating with the plunger pump body is arranged at the lower end of the rod body. A middle ball head for rotatably cooperating with the crescent bearing cage is arranged in the middle of the rod body. The three ball heads on the lever can enable the upper, middle and lower parts of the lever to better rotatably cooperate with the swash plate, the cage and the adjusting block, reduce the movement clearance and make the mechanism operate stably.

[0004] In the above solution, the lever needs to be processed together with the cage for the positioning between the lever and the cage, which increases the processing difficulty of the lever and the cage.

[0005] In addition, in some structures, the part of the connecting shaft after passing through the cage forms a circular ring to hoop the counter part of the pump body. Therefore, the connecting shaft also needs to be processed together with the cage, or the connecting shaft is processed after passing through the cage, and there are certain complexities in both assembly convenience and processing. Summary of the Invention

[0006] In order to solve the above problems, the purpose of the utility model is to provide an installation structure of a swash plate and a plunger pump. In this installation structure, the crescent cage and the connecting shaft are separately processed, which is convenient for processing. After processing, they are assembled. One end of the connecting shaft does not need to be processed again, which is convenient for users to install.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An installation structure of a swash plate and a plunger pump, comprising a swash plate, a plunger pump, and a crescent bearing installed between the swash plate and the plunger pump. The crescent bearing includes a crescent outer ring, a crescent cage, and a roller assembly. The outer end of the crescent outer ring is fitted and adhered to the plunger pump, the crescent cage abuts against the inner end of the crescent outer ring, and the roller assembly includes a plurality of rollers installed on the crescent cage. The raceway surfaces formed on the plurality of rollers are in contact with the swash plate. It is characterized in that:

[0009] The upper end of the crescent cage extends upward to form a mounting seat. An assembly groove is longitudinally constructed on the mounting seat, and a connecting pin is fitted on the assembly groove. A connecting hole is penetrated through the connecting pin along its diameter direction. Swing windows and swing ports communicating with the assembly groove are formed on both sides of the mounting seat. The installation structure further includes a connecting shaft. The connecting shaft is L-shaped, including a long shaft and a short shaft. The end of the long shaft passes through the connecting hole along the swing port and extends out of the swing window and then is connected to the counterpart of the plunger pump, and the short shaft is connected to the swash plate.

[0010] In the above technical solution, a crescent bearing is fitted between the plunger pump and the swash plate. A connecting pin is installed on the crescent cage of the crescent bearing. The connecting shaft is L-shaped. After the long shaft of the connecting shaft passes through the connecting pin, both sides of the connecting shaft are respectively connected to the plunger pump and the swash plate. The connecting pin is installed on the cage. There is no need to set an assembly node on the L-shaped connecting shaft to connect with the cage or the counterpart, nor is it necessary to set a circular ring to hoop and connect with the counterpart. Thus, the processing of the crescent cage and the L-shaped connecting shaft is very convenient, and the assembly is also very convenient.

[0011] Preferably, a slot is formed on the counterpart. The end of the long shaft is inserted into the slot. In this technical solution, the long shaft of the connecting shaft is in an insertion fit with the counterpart of the plunger pump on the plunger pump side, and the counterpart and the slot are arranged vertically. When the connecting shaft swings left and right, the connecting shaft and the counterpart are effectively matched.

[0012] Preferably, the middle part of the connecting pin is recessed inward to form an arc surface. In this technical solution, the middle part of the connecting pin is recessed inward to form an arc surface, which can reduce the friction when the connecting pin rotates in the assembly groove, reduce the wear of the connecting pin, and improve the rotational performance of the connecting pin and the connecting shaft.

[0013] Preferably, the width of the swing window is greater than the diameter of the connecting hole, and the caliber of the swing window gradually becomes larger from the inside to the outside, and the inner wall of the swing window is constructed as an arc surface. In this technical solution, the width of the swing window is greater than the diameter of the connecting hole to ensure that the connecting shaft can rotate in the swing window, and the caliber of the swing window gradually becomes larger from the inside to the outside and the inner wall of the swing window is constructed as an arc surface, which can increase the left and right swing range of the connecting shaft and improve the adjustment range of the bearing.

[0014] Preferably, the diameter of the swing opening gradually increases from inside to outside, and the side wall of the swing opening is constructed as an inclined surface. In this technical solution, the side wall of the swing opening is constructed as an inclined surface, which can increase the left and right swing range of the connecting shaft and improve the adjustment range of the bearing.

[0015] Preferably, the connecting pin is a copper connecting pin. In this technical solution, the copper connecting pin has good wear resistance and can improve the service life of the connecting pin.

[0016] Preferably, the longitudinal section of the mounting seat is in the shape of an isosceles trapezoid. In this technical solution, the cross-section of the mounting seat is in the shape of an isosceles trapezoid, which can increase the connection strength between the mounting seat and the cage and improve the stability of the mounting seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view schematic diagram of the connection between the crescent bearing and the connecting shaft.

[0018] Figure 2 It is Figure 1 The sectional view taken along the line A-A of (the connecting shaft is not shown).

[0019] Figure 3 It is a side view schematic diagram of the connection between the crescent bearing and the connecting shaft.

[0020] Figure 4 It is a three-dimensional structure schematic diagram of the connection between the crescent bearing, the connecting shaft and the counterpart.

[0021] Figure 5 It is a three-dimensional structure schematic diagram of the connection between the crescent bearing, the connecting shaft and the counterpart from another perspective. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise clearly defined.

[0025] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0027] As Figures 1 - 5 shown, an installation structure of a swash plate and a piston pump includes a swash plate, a piston pump, and a crescent bearing installed between the swash plate and the piston pump. The crescent bearing includes a crescent outer ring 1, a crescent cage 2, and a roller assembly. The outer end of the crescent outer ring 1 is fitted and abutted against the piston pump. The crescent cage 2 abuts against the inner end of the crescent outer ring 1. The roller assembly includes a plurality of rollers 3 installed on the crescent cage 2. The raceway surfaces formed on the plurality of rollers 3 are in contact with the swash plate. The upper end of the crescent cage 2 extends upward to form a mounting seat 4. An assembly groove 15 is longitudinally formed on the mounting seat 4. A connecting pin 5 is fitted on the assembly groove 15. A connecting hole 6 is penetrated through the connecting pin 5 along its diameter direction. Swing windows 7 and swing ports 8 communicating with the assembly groove 15 are formed on both sides of the mounting seat 4. The installation structure further includes a connecting shaft 9. The connecting shaft 9 is in an L shape and includes a long shaft 10 and a short shaft 11. One end of the long shaft 10 passes through the connecting hole 6 along the swing port 8 and extends out of the swing window 7 and then is connected to the counter part 12 of the piston pump. The other end of the long shaft 10 and the short shaft 11 are connected to the swash plate.

[0028] In the above technical solution, a crescent bearing is provided between the plunger pump and the swash plate. A connecting pin is installed on the crescent cage of the crescent bearing. The connecting shaft is L-shaped, and its long shaft passes through the connecting pin. Then, both sides of the connecting shaft are respectively connected to the plunger pump and the swash plate. The connecting pin is installed on the cage. There is no need to set an assembly node on the L-shaped connecting shaft to connect with the cage or the mating part, nor is it necessary to set a circular ring to hoop and connect with the mating part. Thus, the processing of the crescent cage and the L-shaped connecting shaft is very convenient, and the assembly is also very convenient.

[0029] Further, a slot 13 is formed on the mating part 12, and the end of the long shaft 10 is inserted into the slot 13. In this technical solution, the long shaft of the connecting shaft is in plug-in fit with the mating part of the plunger pump on the plunger pump side, and the mating part and the slot are arranged vertically. When the connecting shaft swings left and right, the connecting shaft and the mating part are effectively matched.

[0030] Further, the middle part of the connecting pin 5 is recessed inward to form an arc surface. In this technical solution, the middle part of the connecting pin is recessed inward to form an arc surface, which can reduce the friction when the connecting pin rotates in the assembly groove, reduce the wear of the connecting pin, and improve the rotational performance of the connecting pin and the connecting shaft.

[0031] Further, the width of the swing window 7 is greater than the diameter of the connecting hole 6, and the caliber of the swing window 7 gradually increases from the inside to the outside, and the inner wall of the swing window 7 is set as an arc surface. In this technical solution, the width of the swing window is greater than the diameter of the connecting hole to ensure that the connecting shaft can rotate in the swing window. The caliber of the swing window gradually increases from the inside to the outside, and the inner wall of the swing window is constructed as an arc surface, which can increase the left and right swing range of the connecting shaft and improve the adjustment range of the bearing.

[0032] Further, the caliber of the swing port 8 gradually increases from the inside to the outside, and the side wall of the swing port 8 is set as an inclined surface. In this technical solution, the side wall of the swing port is constructed as an inclined surface, which can increase the left and right swing range of the connecting shaft and improve the adjustment range of the bearing.

[0033] Further, the connecting pin 5 is a copper connecting pin. In this technical solution, the copper connecting pin has good wear resistance, which can improve the service life of the connecting pin.

[0034] Further, the longitudinal section of the mounting seat 4 is in the shape of an isosceles trapezoid. In this technical solution, the cross section of the mounting seat is in the shape of an isosceles trapezoid, which can improve the connection strength between the mounting seat and the cage and enhance the stability of the mounting seat.

[0035] In this specific embodiment, for the existing installation structure of the swash plate and the plunger pump, the connecting shaft on the crescent bearing needs to connect the swash plate and the plunger pump on both sides. In order to maintain the stability of the connecting shaft or the connection stability between the connecting shaft and the counter part of the plunger pump, some deformations or nodes need to be made on the connecting shaft, so that the connecting shaft needs to be processed simultaneously with the cage, which increases the processing difficulty and the inconvenience of assembly. The above solution installs a connecting pin on the cage, and then uses an L-shaped connecting shaft to pass through the connecting pin and connect with the plunger pumps and the swash plate on both sides. Moreover, the connecting shaft and the counter part of the plunger pump adopt a plug-in connection method, so that the cage and the L-shaped connecting shaft can be processed independently, improving the convenience of processing and assembly.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0037] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principle and purpose of the present invention.

Claims

1. A mounting structure for a swash plate and a plunger pump, comprising a swash plate, a plunger pump and a crescent bearing mounted between the swash plate and the plunger pump, the crescent bearing comprising a crescent outer ring (1), a crescent retainer (2) and a roller assembly, the outer end of the crescent outer ring (1) being adapted to fit the plunger pump, the crescent retainer (2) being in contact with the inner end of the crescent outer ring (1), the roller assembly comprising a plurality of rollers (3) mounted on the crescent retainer (2), the raceway surfaces formed on the plurality of rollers (3) being in contact with the swash plate, characterized in that: The upper end of the crescent retainer (2) extends upward to form a mounting seat (4), a mounting groove (15) is longitudinally constructed on the mounting seat (4), a connecting pin (5) is adapted to be arranged on the mounting groove (15), a connecting hole (6) is penetrated through the connecting pin (5) along its diameter direction, and a swing window (7) and a swing opening (8) which are in communication with the mounting groove (15) are formed on both sides of the mounting seat (4); the mounting structure further comprises a connecting shaft (9), the connecting shaft (9) is L-shaped, and comprises a long shaft (10) and a short shaft (11), one end of the long shaft (10) passes through the connecting hole (6) along the swing opening (8) and extends out of the swing window (7) to be connected to a counterpart (12) of the plunger pump, and the other end of the long shaft (10) and the short shaft (11) are connected to the swash plate.

2. The installation structure of a swash plate and a plunger pump according to claim 1, characterized in that: The pair of hand pieces (12) are provided with a slot (13), and the end of the long shaft (10) is inserted into the slot (13).

3. The installation structure of a swash plate and a plunger pump according to claim 1, characterized in that: The middle portion of the connecting pin (5) is recessed inwards to form an arc surface.

4. The installation structure of a swash plate and a plunger pump according to claim 3, characterized in that: The width of the swing window (7) is greater than the diameter of the connecting hole (6), the caliber of the swing window (7) gradually increases from the inside to the outside, and the inner wall of the swing window (7) is arranged to be a curved surface.

5. The installation structure of a swash plate and a plunger pump according to claim 3, characterized in that: The diameter of the swing opening (8) gradually increases from the inside to the outside, and the side wall of the swing opening (8) is arranged as an inclined surface.

6. The installation structure of a swash plate and a plunger pump according to claim 1, characterized in that: The connecting pin (5) is a copper connecting pin.

7. The installation structure of a swash plate and a plunger pump according to claim 1, characterized in that: The longitudinal cross-section of the mounting seat (4) is in the shape of an isosceles trapezoid.

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