Novel swash plate type axial plunger pump

Abstract

The utility model discloses a novel swash plate type axial plunger pump which comprises a pump body, the pump body comprises a first pump body and a second pump body, the first pump body and the second pump body are connected through a connecting assembly, the first pump body and the second pump body comprise a shell and a transmission shaft, the transmission shaft is arranged in the shell, and the transmission shaft is arranged in the shell. The transmission shafts comprise the first transmission shaft and the second transmission shaft, the first transmission shaft and the second transmission shaft are each provided with a transmission assembly, and variable adjusting assemblies are arranged above the first pump body and the second pump body. The hydraulic system is simple in structure, reasonable in design and compact in overall structure arrangement, the use space of the hydraulic system is optimized, and simultaneous operation of the first pump body and the second pump body is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a novel swash plate type axial plunger pump. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment.

[0003] Deficiencies of existing technology:

[0004] Currently, when the plunger pump is running in the hydraulic system, it usually occupies a large amount of space in the hydraulic system, and the pipeline discharge is inconvenient, resulting in the plunger pump's oil output not being smooth. Utility Model Content

[0005] The purpose of the utility model is to provide a novel swash plate axial piston pump to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a novel swash plate axial piston pump, comprising a pump body, characterized in that: the pump body comprises a first pump body and a second pump body, the first pump body and the second pump body being connected by a connecting assembly, the first pump body and the second pump body comprising a housing and a transmission shaft, the transmission shaft being arranged inside the housing, the transmission shaft comprising a first transmission shaft and a second transmission shaft, the first transmission shaft and the second transmission shaft being both provided with a transmission assembly, a variable adjustment assembly being provided above the first pump body and the second pump body, the transmission assembly comprising:

[0007] a cylinder body, the cylinder body being provided on both the first transmission shaft and the second transmission shaft;

[0008] a swash plate, the swash plate being arranged on the transmission shaft and being provided with a thrust plate;

[0009] A ball joint, the ball joint being arranged at the center of the cylinder body via a connecting piece;

[0010] A return plate is arranged on the outer spherical surface of the ball joint.

[0011] Preferably, the variable adjustment component includes:

[0012] A flow piston, the flow piston is arranged above the housing in parallel with the transmission shaft, and the front and rear ends of the flow piston are provided with piston cavities and move in the piston cavities;

[0013] a flow regulating screw connected to the flow piston;

[0014] A shift rod is fixed to the flow piston through a fixing piece, a shift head is provided below the shift rod, and the shift head is connected to the swash plate.

[0015] Preferably, the tail of each of the first pump body and the second pump body is provided with a rear cover, and an oil distribution tray is provided inside the rear cover.

[0016] Preferably, the connection assembly includes:

[0017] A connecting sleeve connecting the first transmission shaft and the second transmission shaft, wherein the connection between the first transmission shaft and the second transmission shaft is provided with a spline, and the interior of the connecting sleeve is provided with a spline that cooperates with the connection between the first transmission shaft and the second transmission shaft;

[0018] A transition plate, through which the first pump body and the second pump body are fixedly connected.

[0019] Preferably, a plurality of plungers are provided inside the cylinder body, and a sliding shoe is provided on the head of the plunger, and the sliding shoe is connected through the return plate.

[0020] Preferably, an iron sleeve matching with the dial head is provided on the upper part of the swash plate.

[0021] Preferably, the first transmission shaft, the second transmission shaft, the cylinder body and the ball joint are provided with matching splines.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. A new type of swash plate axial piston pump is provided with a transmission assembly, which includes a cylinder body, a swash plate, a ball joint and a return plate. The cylinder body is connected to the first transmission shaft and the second transmission shaft, the swash plate is connected to the transmission shaft, the ball joint is installed on the cylinder body through spring pre-tightening, a thrust plate is installed on the swash plate, a plurality of plungers are installed inside the cylinder body, a sliding shoe is provided on the plunger head, the return plate is installed on the ball joint, the sliding shoe passes through the plane of the sliding shoe connected to the return plate and contacts the plane of the thrust plate, the arc surface of the cylinder body and the arc surface of the oil distribution plate cooperate, the spline on the first transmission shaft drives the cylinder body to rotate, and the cylinder body is connected to the spline on the first transmission shaft through the spline inside the cylinder body and the spline inside the ball joint. The overall structure is compactly arranged, which optimizes the use space of the hydraulic system and realizes the simultaneous operation of the first pump body and the second pump body.

[0024] 2. This is a new type of inclined plate axial piston pump. The rear cover is provided with an oil inlet and two oil outlets. The inner side of the rear cover is provided with an oil suction groove and an oil discharge groove. The flow direction of the oil discharge groove is set in two directions of 90 degrees respectively. The oil enters the hydraulic system from any oil outlet of the rear cover, reducing unnecessary bends in the pipeline and making the oil discharge from the first pump body and the second pump body smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] In the figure: 110, first pump body; 120, second pump body; 130, housing; 140, drive shaft; 141, first drive shaft; 142, second drive shaft; 151, cylinder body; 152, swash plate; 1521, iron sleeve; 153, ball joint; 154, return plate; 155, plunger; 1551, sliding shoe; 161, flow piston; 162, flow regulating screw; 163, shift rod; 164, shift head; 170, rear cover; 171, oil distribution plate; 181, connecting sleeve; 182, transition plate; 190, spline. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 understood as a limitation on the present invention.

[0029] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "disposed" should be understood broadly. For example, they can refer to fixed connection or disposition, detachable connection or disposition, or integrated connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0030] Furthermore, 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 number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "several" means two or more, unless otherwise specifically defined.

[0031] Example

[0032] See also Figure 1 As shown, the utility model provides a new type of swash plate axial piston pump technical solution: including a pump body, the pump body includes a first pump body 110 and a second pump body 120, the first pump body 110 and the second pump body 120 are connected by a connecting assembly, the first pump body 110 and the second pump body 120 include a housing 130 and a transmission shaft 140, the transmission shaft 140 is installed inside the housing 130, the transmission shaft 140 includes a first transmission shaft 141 and a second transmission shaft 142, the first transmission shaft 141 and the second transmission shaft 142 are both connected to a transmission assembly, a variable adjustment assembly is respectively installed above the first pump body 110 and the second pump body 120, the transmission assembly includes a cylinder body 151, a swash plate 152, a ball joint 153 and a return plate 154, the first transmission shaft 141 and the second transmission shaft 142 are both connected to the cylinder body 151, the swash plate 152 is connected to the transmission shaft 140, and the ball joint 153 is pre-loaded by a spring. It is tightly installed on the cylinder body 151, and several equal-height springs are arranged inside the ball joint 153 to adjust the center height of the cylinder body 151. A thrust plate is installed on the swash plate 152, and several plungers 155 are installed inside the cylinder body 151. A sliding shoe 1551 is provided on the head of the plunger 155. The return plate 154 is installed on the ball joint 153. The sliding shoe 1551 passes through the return plate 154 and the plane of the sliding shoe 1551 contacts the plane of the thrust plate. Splines 190 are provided on the first transmission shaft 141, the second transmission shaft 142, the inside of the cylinder body 151 and the inside of the ball joint 154. The splines 190 on the first transmission shaft 141 drive the cylinder body 151 to rotate. The cylinder body 151 is connected to the splines 190 on the first transmission shaft 141 through the splines 190 inside the cylinder body 151 and the splines 190 inside the ball joint 153. The overall structure is compactly arranged, realizing the simultaneous operation of the first pump body 110 and the second pump body 120.

[0033] Furthermore, the variable adjustment component includes a flow piston 161, a flow adjustment screw 162 and a shift rod 163. The flow piston 161 is installed above the housing 130 in parallel with the transmission shaft 140. The flow piston 161 is provided with a piston cavity at the front and rear ends and the flow piston 161 moves in the piston cavity. The flow adjustment screw 162 is connected to the flow piston 161. The shift rod 163 is fixedly connected to the flow piston 161 by a screw. A shift head 164 is installed below the shift rod 163. The shift head 164 is connected to the swash plate 152. During operation, the spline 190 on the first transmission shaft 141 drives the cylinder body 151 to rotate. The cylinder body 151 rotates through the spline inside the cylinder body 151. The key 190 and the spline 190 inside the ball joint 153 are connected to the spline 190 on the first transmission shaft 141 for transmission. When the cylinder body 151 rotates, it reciprocates with the plunger 155 to generate oil suction and oil pressure. The flow range of the output high-pressure oil is precisely adjusted by the flow regulating screw 162. The pull head 164 is inserted into the iron sleeve 1521. When the variable piston 161 moves left and right, it drives the swash plate 152 to swing around the center of the ball joint 153, changing the angle of the swash plate 152, thereby changing the output displacement of the first pump body 110. The first transmission shaft 141 drives the second pump body 120 to operate through the connecting assembly, which reasonably saves space in the hydraulic system.

[0034] Furthermore, a rear cover 170 is installed at the tail of the first pump body 110 and the second pump body 120. The material of the rear cover 170 is ductile iron. An oil distribution plate 171 is installed on the inside of the rear cover 170. The arc surface of the cylinder body 151 matches the arc surface of the oil distribution plate 171. The rear cover 170 is provided with an oil inlet and two oil outlets. An oil suction groove and an oil discharge groove are provided on the inside of the rear cover 170. The flow direction of the oil discharge groove is set in two directions of 90° respectively, and enters the hydraulic system from any oil outlet of the rear cover 170, reducing unnecessary bends in the pipeline, so that the oil outlet of the first pump body 110 and the second pump body 120 is smoother.

[0035] Furthermore, the connecting assembly includes a connecting sleeve 181 and a transition plate 182. The connecting sleeve 181 connects the first transmission shaft 141 and the second transmission shaft 142. Splines 190 are provided at the connections of the first transmission shaft 141 and the second transmission shaft 142. The connecting sleeve 181 is internally installed with a spline 190 that cooperates with the connection between the first transmission shaft 141 and the second transmission shaft 142. The spline 190 at the connection between the first transmission shaft 141 and the second transmission shaft 142 is inserted into the spline 190 of the connecting sleeve 181 to realize simultaneous linkage of the first transmission shaft 141 and the second transmission shaft 142.

[0036] The working principle of this utility model is as follows:

[0037] When a new type of swash plate axial piston pump of this embodiment is in use, the spline 190 on the first transmission shaft 141 drives the cylinder body 151 to rotate, and the cylinder body 151 is connected to the spline 190 on the first transmission shaft 141 through the internal spline 190 of the cylinder body 151 and the spline 190 inside the ball joint 153. When the cylinder body 151 rotates, it reciprocates with the plunger 155 to generate oil suction and oil pressure. The flow range of the output high-pressure oil is precisely adjusted by the flow regulating screw 162, and the pull head 164 is inserted into the iron sleeve 1521. When the variable piston 161 moves left and right, it drives the swash plate 152 to swing around the center of the ball joint 153, changing the angle of the swash plate 152, thereby changing the output displacement of the first pump body 110. The first transmission shaft 141 drives the second pump body 120 to operate through the connecting assembly, which reasonably saves space in the hydraulic system.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel swash plate axial piston pump, comprising a pump body, characterized in that: The pump body comprises a first pump body (110) and a second pump body (120), wherein the first pump body (110) and the second pump body (120) are connected by being provided with a connecting assembly, wherein the first pump body (110) and the second pump body (120) comprise a housing (130) and a transmission shaft (140), wherein the transmission shaft (140) is arranged inside the housing (130), wherein the transmission shaft (140) comprises a first transmission shaft (141) and a second transmission shaft (142), wherein the first transmission shaft (141) and the second transmission shaft (142) are both provided with a transmission assembly, wherein a variable adjustment assembly is provided above the first pump body (110) and the second pump body (120), wherein the transmission assembly comprises: a cylinder body (151), the cylinder body (151) being provided on both the first transmission shaft (141) and the second transmission shaft (142); a swash plate (152), the swash plate (152) being disposed on the transmission shaft (140), the swash plate (152) being provided with a thrust plate; A ball joint (153), the ball joint (153) being arranged at the center of the cylinder body (151) via a connecting piece; A return disc (154) is provided on the outer spherical surface of the ball joint (153).

2. A novel swash plate axial piston pump according to claim 1, characterized in that: The variable adjustment component includes: A flow piston (161), the flow piston (161) is arranged above the housing (130) in parallel with the transmission shaft (140), and the flow piston (161) is provided with piston cavities at the front and rear ends and moves in the piston cavities; a flow regulating screw (162), the flow regulating screw (162) being connected to the flow piston (161); A shift rod (163) is fixedly arranged on the flow piston (161) through a fixing member. A shift head (164) is arranged below the shift rod (163), and the shift head (164) is connected to the swash plate (152).

3. A novel swash plate axial piston pump according to claim 1, characterized in that: The tails of the first pump body (110) and the second pump body (120) are both provided with a rear cover (170), and an oil distribution plate (171) is provided inside the rear cover (170).

4. A novel swash plate axial piston pump according to claim 1, characterized in that: The connection component includes: A connecting sleeve (181), the connecting sleeve (181) connecting the first transmission shaft (141) and the second transmission shaft (142), a spline (190) being provided at the connection between the first transmission shaft (141) and the second transmission shaft (142), and a spline (190) matching the connection between the first transmission shaft (141) and the second transmission shaft (142) being provided inside the connecting sleeve (181); A transition plate (182), wherein the first pump body (110) and the second pump body (120) are fixedly connected via the transition plate (182).

5. The novel swash plate axial piston pump according to claim 1 is characterized in that: A plurality of plungers (155) are provided inside the cylinder body (151), and a sliding shoe (1551) is provided on the head of the plunger (155), and the sliding shoe (1551) is connected to the return disc (154) through the plunger (155).

6. A novel swash plate axial piston pump according to claim 2, characterized in that: An iron sleeve (1521) that matches the dial head (164) is provided on the upper portion of the swash plate (152).

7. The novel swash plate axial piston pump according to claim 1 is characterized in that: The first transmission shaft (141), the second transmission shaft (142), the cylinder body (151) and the ball joint (153) are provided with matching splines (190).

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