A through shaft type bevel gear train synchronous swash plate plunger pump

Abstract

The application discloses a through-shaft type bevel gear system synchronous type swash plate plunger pump, which comprises a shell, a driving shaft and a plunger assembly. The first swash plate and the second swash plate are symmetrically arranged in the shell, the first pressure plate assembly and the second pressure plate assembly are respectively arranged on the two swash plates, a ball hinge is arranged between the assemblies, the driving shaft penetrates through each component, the shell is provided with an oil inlet and an oil outlet, the synchronous gear ring is fixedly connected with the shell, the first swash plate and the second swash plate are fixed on the driving shaft through the spline and can rotate and are respectively connected with the pressure plate assembly kinematic pair. The plunger assembly comprises a plunger and a plunger cylinder and is arranged between the pressure plate assemblies of the two swash plates. The synchronous gear ring is arranged between the pressure plate assemblies, the two side gears of the synchronous gear ring are matched with the bevel gear teeth, the bevel gear system is adopted to stabilize the core component of the plunger pump, the pressure plate assembly only swings and does not rotate, the plunger assembly is driven to reciprocate in the process of the rotation of the main shaft, and the medium suction and discharge are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of plunger pumps, and in particular relates to a through-shaft bevel gear system synchronous swash plate plunger pump. Background Art

[0002] The plunger pump is a key component in hydraulic systems. It relies on the reciprocating motion of a plunger within a cylinder, causing the volume of a sealed working chamber to change, thereby absorbing and compressing oil. This pump offers numerous advantages, including high rated pressure, compact structure, high efficiency, and easy flow regulation. Consequently, it is widely used in applications requiring high pressure, high flow, and flow regulation, including aviation, shipbuilding, and industry. Currently, with the increasing trend toward electrification, compactness, and energy efficiency in various main engines, plunger pumps are required to further develop their performance towards a wider range of speeds, higher pressures, and higher efficiency.

[0003] Currently, the rated pressure and speed range of plunger pumps are subject to certain constraints. The reasons for this phenomenon include: 1. Axial piston pumps and motors have large lateral forces at the plunger pair, which requires the dynamic pressure field balance of the oil film in the gap. At low speeds, the dynamic effect is insufficient and cannot be effectively supported; 2. The long contact length of the plunger cylinder cylindrical seal makes it difficult to maintain a stable oil film under high-speed conditions; 3. The rotating components of traditional plunger motors include components such as the cylinder and plunger, which have large moments of inertia and poor performance under conditions of rapid speed changes; 4. Tapered plunger and connecting rod type bevel axis plunger motors are driven by connecting rods and tapered plungers, which have large impacts during operation. They also need to consider the motion interference between the connecting rod plunger and the cylinder tapered plunger, which also affects the strength of the connecting rod and cylinder. Therefore, they are prone to wear and strength problems at the plunger pair or connecting rod plunger under strong impact conditions; 5. Traditional plunger pump motors stir the oil in the casing under high-speed conditions, resulting in additional energy loss.

[0004] Therefore, a through-shaft bevel gear synchronous swash plate plunger pump is proposed to adapt to the trend of high pressure, wide speed and low rotational inertia of plunger pumps. Summary of the Invention

[0005] The application provides a through shaft type bevel gear system synchronous swash plate plunger pump to adapt to the trend of high pressure, wide rotating speed, high frequency change of rotating speed and high power density ratio of the plunger pump, and comprises a shell, a driving shaft and a plunger assembly, an oil inlet and an oil outlet are arranged on the shell, a synchronous gear ring is arranged in the shell, a first pressure plate assembly and a second pressure plate assembly are symmetrically arranged on the two sides of the synchronous gear ring, the edges of the first pressure plate assembly and the second pressure plate assembly are provided with gears meshing with the synchronous gear ring, the first pressure plate assembly and the second pressure plate assembly are butted through a ball hinge, a first swash plate and a second swash plate are respectively arranged on the working surfaces of the first pressure plate assembly and the second pressure plate assembly, the driving shaft penetrates through the shell, the first swash plate, the first pressure plate assembly, the second swash plate, the second pressure plate assembly and the ball hinge between the two pressure plate assemblies in the shell, the first swash plate and the second swash plate are driven through the driving shaft, a plurality of plunger assemblies are arranged between the first swash plate and the second swash plate, and one of the first swash plate and the second swash plate serves as an oil distribution plate.

[0006] Preferably, the shell and the synchronous gear ring are fixedly installed, the shell comprises a left half shell and a right half shell, the two side annular end faces of the synchronous gear ring are provided with gears, the right side of the first bevel gear plate and the left side of the second bevel gear plate are provided with gears matched with the gears on the two sides of the synchronous gear ring, a bevel gear system is formed, the degrees of freedom of the first pressure plate assembly and the second pressure plate assembly are constrained, a fixed flange is arranged on the periphery of the synchronous gear ring, the fixed flange is fixed at the buckling position of the left half shell and the right half shell during installation, and sealing rings are arranged on the two sides of the fixed flange and fixedly connected with the shell through bolts.

[0007] Preferably, the shell and the synchronous gear ring are fixedly installed, the shell comprises a left half shell and a right half shell, the synchronous gear ring is divided into a left half gear ring and a right half gear ring along an axis, the left half gear ring is integrally formed with the left half shell, the right half gear ring is integrally formed with the right half shell, the annular end faces of the left half gear ring and the right half gear ring in contact are flush with the buckling position of the shell, the left half gear ring and the right half gear ring are tightly attached during buckling of the shell, sealing rings are arranged at the buckling position, the non-contact annular end faces of the left half gear ring and the right half gear ring are provided with lateral gears, the right side of the first bevel gear plate and the left side of the second bevel gear plate are provided with gears matched with the gears on the two sides of the synchronous gear ring, a bevel gear system is formed, and the degrees of freedom of the first pressure plate assembly and the second pressure plate assembly are constrained.

[0008] Preferably, the shell and the synchronous gear ring are fixedly installed, the shell is further provided with an end cover, and sealing rings are arranged at the buckling position of the end cover.

[0009] Preferably, a plurality of stepped recesses are arranged on the left and right sides inside the shell, the first swash plate is fixed on the driving shaft by a key connection mode, the first swash plate is arranged in the rightmost recess on the left side inside the shell, a bearing is arranged in the recess, the first swash plate can rotate under the driving of the driving shaft, an inclined working surface is arranged on the right side of the first swash plate, a first pressure plate assembly is arranged on the inclined working surface, the first swash plate is connected with the pressure plate assembly through a kinematic pair, the second swash plate is fixed on the driving shaft by a key connection mode, the second swash plate is arranged in the leftmost recess on the right side inside the shell, a bearing is arranged in the recess, the second swash plate can rotate under the driving of the driving shaft, an inclined working surface is arranged on the left side of the second swash plate, a second pressure plate assembly is arranged on the inclined working surface, the second swash plate is connected with the pressure plate assembly through a kinematic pair.

[0010] Preferably, the first pressure plate assembly comprises a first bevel gear and a first pressure plate, a plurality of ball seats are arranged on the mounting surface of the first bevel gear, a plurality of round holes are arranged on the first pressure plate corresponding to the ball seats on the first bevel gear; the second pressure plate assembly comprises a second bevel gear and a second pressure plate, a plurality of ball seats are arranged on the mounting surface of the second bevel gear, a plurality of round holes are arranged on the second pressure plate corresponding to the ball seats on the second bevel gear.

[0011] Preferably, the first pressure plate and the second pressure plate are both provided with ring tables with inner spherical surface grooves, the ring table on the first pressure plate is arranged opposite to the ring table on the second pressure plate, and a spherical hinge is arranged in the inner spherical surface groove of the ring table.

[0012] Preferably, the plunger assembly comprises a corresponding plunger and plunger cylinder, a spherical head at the end of the plunger is arranged in the ball seat between the first bevel gear and the first pressure plate, a spherical head at the end of the plunger cylinder is arranged in the ball seat between the second bevel gear and the second pressure plate, and the plunger and the plunger cylinder are connected in a cylindrical pair.

[0013] Preferably, an oil inlet and an oil outlet are arranged in the shell, and the oil inlet and the oil outlet correspond to the oil inlet and the oil outlet on the first swash plate or the second swash plate.

[0014] The present application adopts a bevel gear system to stabilize the core components of the plunger pump, so that the bevel gear and the pressure plate only swing and do not rotate. The friction force of the swash plate acting on the bevel gear is directly offset by the bevel gear meshing part, and will not be transmitted to the spherical hinge position of the plunger assembly, thereby optimizing the stress structure; by only rotating the driving shaft and the swash plate, rotational dynamic balance can be achieved, the rotational inertia is reduced, the rotational speed and the motion stability are improved; the double spherical pair connection structure of the plunger assembly can reduce the lateral force of the plunger, so that the plunger can run stably even under the working conditions of high pressure, high speed, low speed and low viscosity medium. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the overall structure of the present application;

[0016] Figure 2It is a cross-sectional view of the internal structure of the present invention;

[0017] Figure 3 is a cross-sectional view of the shell of the present invention;

[0018] Figure 4 It is a schematic diagram of the overall structure of the gear ring of the present invention;

[0019] Figure 5 is a left side view of the second swash plate of the present invention;

[0020] Figure 6 is a cross-sectional view of the overall structure of the second embodiment of the present invention;

[0021] Figure 7 is a cross-sectional view of the overall structure of the third embodiment of the present invention;

[0022] 1-housing, 11-connecting flange, 12-multi-stage countersunk, 101-left half housing, 102-right half housing, 103-end cover, 2-drive shaft, 21-docking oil passage, 3-first slant plate, 4-second slant plate, 31-first pressure plate assembly, 311-first bevel gear plate, 312-first pressure plate, 41-second pressure plate assembly, 411-second bevel gear plate, 412-second pressure plate, 413-gear plate oil passage, 42-oil inlet passage, 43-oil outlet passage, 5-plunger assembly, 51-plunger, 52-plunger cylinder, 521-plunger oil passage, 6-ball joint, 7-synchronizing gear ring, 71-fixed flange, 8-oil inlet, 9-oil outlet. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0024] like Figure 1 、 Figure 2 、 Figure 5As shown, a kind of through shaft type bevel gear system synchronous swash plate plunger pump, including shell 1, drive shaft 2, first swash plate 3, second swash plate 4, first pressure plate assembly 31, second pressure plate assembly 41, plunger assembly 5, ball hinge 6 and synchronous gear ring 7, shell 1 is formed by left half shell and right half shell buckling, and annular flange plate is arranged at buckling place, and a plurality of screw holes are arranged in the circumferential array on the flange plate, and bolt is arranged in the screw hole and fixed, installation space is formed in the left half shell and right half shell, first swash plate 3 is arranged in the installation space of left half shell, second swash plate 4 is arranged in the installation space of right half shell, first swash plate 3 and second swash plate 4 are symmetrically arranged, and the inclined working surface is arranged on the right side of first swash plate 3, first pressure plate assembly 31 is arranged on the inclined working surface of first swash plate 3, first pressure plate assembly 31 includes first bevel gear 311 and first pressure plate 312, a circle of lateral teeth is arranged on the outer edge of first bevel gear 311, a plurality of ball seats are distributed in the circumferential direction on the right side mounting surface of first bevel gear 311, annular table is arranged in the middle of first pressure plate 312, a plurality of round holes are arranged on the disc surface of first pressure plate 312, a plurality of round holes are adapted to corresponding ball seats on first bevel gear 311, recess with inner spherical surface is arranged on the front end of the annular table of first pressure plate 312, the left side of first bevel gear 311 is in contact with the inclined working surface of first swash plate 3, and first pressure plate 312 is adapted to be arranged on the right side of the mounting surface of first bevel gear 311;Second swash plate 4 is respectively provided with oil inlet channel 42 and oil outlet channel 43, annular cavity is formed at the connection of second swash plate 4 and shell 1, oil inlet channel 42 is directly communicated with annular cavity, and oil outlet channel 43 is arranged in the interior of second swash plate 4, and the butt joint oil channel 21 in the drive shaft 2 is butt jointed with the oil outlet channel 43, and sealing ring is arranged on both sides of the butt joint, when the drive shaft 2 is installed, the oil outlet channel 43 is corresponded with the butt joint oil channel 21 in the drive shaft 2, the left side of second swash plate 4 is provided with inclined working surface, second pressure plate assembly 41 is arranged on the inclined working surface of second swash plate 4, second pressure plate assembly 41 includes second bevel gear 411 and second pressure plate 412, a circle of lateral teeth is arranged on the outer edge of second bevel gear 411, a plurality of ball seats are distributed in the circumferential direction on the left side mounting surface of second bevel gear 411, annular table is arranged in the middle of second pressure plate 412, a plurality of round holes are arranged on the disc surface of second pressure plate 412, a plurality of round holes are adapted to corresponding ball seats on second bevel gear 411, recess with inner spherical surface is arranged on the front end of the annular table of second pressure plate 412, the right side of second bevel gear 411 is in contact with the inclined working surface of second swash plate 4, and second pressure plate 412 is adapted to be arranged on the left side of the mounting surface of second bevel gear 411, ball hinge 6 is arranged in the recess with inner spherical surface on the front end of first pressure plate 312 and second pressure plate 412.A plurality of plunger assemblies 5 are arranged between the first swash plate 3 and the second swash plate 4, the plunger assembly 5 comprises a plunger 51 and a plunger cylinder 52 which are adaptively connected, the plunger 51 is arranged in the ball seat between the first bevel gear plate 311 and the first pressure plate 312, the plunger cylinder 52 is arranged in the ball seat between the second bevel gear plate 411 and the second pressure plate 412, the plunger 51 is connected with the plunger cylinder 52 in the way of cylindrical pair, the ball head end of the plunger cylinder 52 is provided with a plunger oil channel 521, and the plunger oil channel 521 is connected with the gear plate oil channel 413 on the second bevel gear plate 411.

[0025] As shown in Figure 1 , Figure 3 and Figure 4 , the housing 1 is fixedly arranged with a synchronous gear ring 7 in the installation space, the synchronous gear ring 7 is arranged around the first bevel gear plate 311 and the second bevel gear plate 411, the two side annular end faces of the synchronous gear ring 7 are provided with gears which are respectively engaged with the gears at the edges of the first bevel gear plate 311 and the second bevel gear plate 411, and a fixed flange 71 is arranged on the periphery of the synchronous gear ring 7 and can be bolted and fixedly connected with the flange plate at the fastening position of the housing 1.

[0026] As shown in Figure 1 , Figure 2 , Figure 3 , the drive shaft 2 penetrates the first swash plate 3, the first pressure plate assembly 31, the ball hinge 6, the second pressure plate assembly 41 and the second swash plate 4 in sequence, the left half housing 101 is provided with a connecting flange 11 on the outer side, a shaft hole is arranged at the center of one side of the connecting flange 11 of the left half housing 101, a multi-stage counterbore 12 is arranged inside, the multi-stage counterbore 12 is specifically three stages, the plunger sealing ring and the bearing are nested in the multi-stage counterbore 12 of the left half housing 101 from left to right, the first swash plate 3 is arranged in the multi-stage counterbore 12 of the left half housing 101 on the left side, the multi-stage counterbore 12 is arranged on the inner side of the right half housing 102 corresponding to the left half housing 101, the plunger sealing ring and the bearing are nested in the multi-stage counterbore 12 from right to left, the second swash plate 4 is arranged in the multi-stage counterbore 12 of the right half housing 102 on the right side, the drive shaft 2 is fixed with the first swash plate 3 and the second swash plate 4 by means of spline, key or interference, etc., in any way, when the drive shaft 2 rotates, the left side of the first swash plate 3 cooperates with the bearing in the multi-stage counterbore 12 of the left half housing 101, the right side of the second swash plate 4 cooperates with the bearing in the multi-stage counterbore 12 of the right half housing 102, at this time, the rotation of the drive shaft 2 can drive the first swash plate 3 and the second swash plate 4 to rotate; the oil inlet 8 is arranged on the right side of the right half housing 102, and the oil outlet 9 is arranged in the middle.

[0027] In use, the first swash plate 3 and the second swash plate 4 are arranged symmetrically, the left side of the first swash plate 3 cooperates with the bearing in the multi-stage counterbore 12 of the left half housing 101, the right side of the second swash plate 4 cooperates with the bearing in the multi-stage counterbore 12 of the right half housing 102, when the drive shaft 2 rotates, the first swash plate 3 and the second swash plate 4 rotate with the drive shaft 2.

[0028] Because of the inclination angle between swash plate and rotation axis, the end face of swash plate presents periodic fluctuation. Therefore, the first bevel gear 311 and the second bevel gear 411 fluctuate synchronously around the spherical hinge 6 when the first swash plate 3 and the second swash plate 4 move. The teeth on both sides of the synchronous gear ring 7 mesh with the teeth on the outer edge of the first bevel gear 311 and the second bevel gear 411, forming a gear train. At the low point of the swash plate, the teeth on the outer edge of the synchronous gear ring 7 and the bevel gear are always in meshing state, limiting the rotation of the pressure plate assembly, so that the first bevel gear 311 and the second bevel gear 411 can fluctuate synchronously. At the same time, the plunger assembly 5 between the first pressure plate assembly 31 and the second pressure plate assembly 41 also makes axial reciprocating motion with the fluctuation of the first bevel gear 311 and the second bevel gear 411.

[0029] When the swash plate high point pushes the plunger assembly 5, the plunger 51 is squeezed into the plunger barrel 52 by the pressure plate assembly; when the swash plate low point stretches the plunger assembly 5, the plunger 51 is stretched out of the plunger barrel 52 under the traction of the pressure plate assembly. When the motor fixed on the left connecting flange 11 of the shell 1 drives the drive shaft 2 to rotate, the plunger assembly 5 opens and closes regularly, forming two oil paths of oil inlet and oil outlet. The oil inlet path is from the oil inlet 8, through the annular cavity into the oil inlet channel 42 inside the second swash plate 4, through the gear plate oil channel 413 and the plunger oil channel 521 into the cavity of the plunger assembly 5; the oil outlet path is through the closure of the plunger assembly 5 to push the oil into the plunger oil channel 521, through the gear plate oil channel 413 into the oil outlet channel 43 and the butt joint oil channel 21, and then into the oil outlet 9.

[0030] Example two:

[0031] As shown in Figure 6 The second embodiment is only different from the first embodiment in that the teeth ring of the synchronous gear ring 7 is divided into two parts along the axial direction in the second embodiment, the left half of the teeth ring is integrally formed with the left half of the shell 101, and the right half of the teeth ring is integrally formed with the right half of the shell 102. The left half of the teeth ring is arranged at the fastening position of the left half of the shell 101, and the right half of the teeth ring is arranged at the fastening position of the right half of the shell 102. The non-contact annular end face between the left half of the teeth ring and the right half of the teeth ring is provided with lateral teeth, which can be in partial meshing state with the teeth on the edge of the first bevel gear 311 and the second bevel gear 411 respectively, forming a gear train. The annular end face of the left half of the teeth ring and the right half of the teeth ring in contact state is in close contact state when the shell 1 is fastened.

[0032] Example three:

[0033] As shown in Figure 7As shown, the third embodiment is unique from the first embodiment in that the housing 1 in the third embodiment includes a one-piece housing and an end cap 103. The housing 1 is fixedly mounted with the timing ring 7 through a keyway. A sealing ring is provided at the location where the end cap 103 is fastened. An oil inlet 8 and an oil outlet 9 are provided on the end cap 103. Corresponding multi-stage counterbores 12 are provided in the one-piece housing and the end cap 103.

Claims

1. A through-axis bevel gear synchronous swash plate plunger pump, comprising a housing (1), a drive shaft (2) and a plunger assembly (5), wherein an oil inlet (8) and an oil outlet (9) are provided on the housing (1), and characterized in that: A synchronous gear ring (7) is provided in the housing (1), and a first pressure plate assembly (31) and a second pressure plate assembly (41) are symmetrically provided on both sides of the synchronous gear ring (7), and teeth meshing with the synchronous gear ring (7) are provided on the edges of the first pressure plate assembly (31) and the second pressure plate assembly (41), and the first pressure plate assembly (31) and the second pressure plate assembly (41) are connected to each other through a ball joint (6), and a first slant plate (3) and a second slant plate (4) are provided on the working surfaces of the first pressure plate assembly (31) and the second pressure plate assembly (41), respectively. The drive shaft (2) passes through the housing (1) and the first slant plate (3), the first pressure plate assembly (31), the second slant plate (4), the second pressure plate assembly (41) and the ball joint (6) between the two groups of pressure plate assemblies inside the housing (1), and the first slant plate (3) and the second slant plate (4) are driven by the drive shaft (2), and a plurality of plunger assemblies (5) are provided between the first slant plate (3) and the second slant plate (4), and one of the first slant plate (3) and the second slant plate (4) serves as an oil distribution plate.

2. A through-axis bevel gear synchronous swash plate plunger pump according to claim 1, characterized in that: The housing (1) is fixedly mounted on the synchronous gear ring (7). The housing (1) includes a left half housing (101) and a right half housing (102). The annular end surfaces on both sides of the synchronous gear ring (7) are provided with teeth. The right side of the first bevel gear disc (311) and the left side of the second bevel gear disc (411) are provided with teeth that match the teeth on both sides of the synchronous gear ring (7), forming a bevel gear train to constrain the freedom of the first pressure plate assembly (31) and the second pressure plate assembly (41). A fixing flange (71) is provided on the periphery of the synchronous gear ring (7). The fixing flange (71) is fixed to the buckling portion of the left half housing (101) and the right half housing (102) during installation. Sealing rings are provided on both sides of the fixing flange (71) and fixedly connected to the housing (1) by bolts.

3. The through-axis bevel gear synchronous swash plate plunger pump according to claim 1, characterized in that: The housing (1) is fixedly mounted on the synchronous gear ring (7), and the housing (1) includes a left half housing (101) and a right half housing (102). The synchronous gear ring (7) is divided into a left half gear ring and a right half gear ring along the axis. The left half gear ring is integrally formed with the left half housing (101), and the right half gear ring is integrally formed with the right half housing (102). The annular end faces of the left half gear ring and the right half gear ring in contact are flush with the engagement portion of the housing (1). When the housing (1) is engaged, the left half gear ring and the right half gear ring are tightly fitted, and a sealing ring is provided at the engagement portion. The non-contact annular end faces of the left half gear ring and the right half gear ring are both provided with lateral teeth. The right side of the first bevel gear disc (311) and the left side of the second bevel gear disc (411) are both provided with teeth that match the teeth on both sides of the synchronous gear ring (7), forming a bevel gear train to constrain the freedom of the first pressure plate assembly (31) and the second pressure plate assembly (41).

4. A through-axis bevel gear synchronous swash plate plunger pump according to claim 1, characterized in that: The housing (1) is fixedly mounted on the synchronous gear ring (7), and the housing (1) is further provided with an end cover (103), and a sealing ring is provided at the buckling position of the end cover (103).

5. A through-axis bevel gear synchronous swash plate plunger pump according to any one of claims 2 to 4, characterized in that: Multi-stage countersunk holes (12) are provided on the left and right sides of the housing (1), the first swash plate (3) is fixed to the drive shaft (2) by a key connection, the first swash plate (3) is provided in the rightmost countersunk hole on the left side of the housing (1), a bearing is sleeved in the countersunk hole, the first swash plate (3) can rotate under the drive of the drive shaft (2), an inclined working surface is provided on the right side of the first swash plate (3), a first pressure plate assembly (31) is provided on the inclined working surface, the first swash plate (3) is kinematically connected to the pressure plate assembly (31), the second swash plate (4) is fixed and passed through the drive shaft (2) by a key connection, the second swash plate (4) is provided in the leftmost countersunk hole on the right side of the housing (1), a bearing is sleeved in the countersunk hole, the second swash plate (4) can rotate under the drive of the drive shaft (2), an inclined working surface is provided on the left side of the second swash plate (4), a second pressure plate assembly (41) is provided on the inclined working surface, the second swash plate (4) is kinematically connected to the pressure plate assembly (41).

6. A through-axis bevel gear synchronous swash plate plunger pump according to claim 5, characterized in that: The first pressure plate assembly (31) comprises a first conical toothed plate (311) and a first pressure plate (312), a plurality of ball seats being correspondingly provided on the mounting surface of the first conical toothed plate (311), and a plurality of circular holes being provided on the first pressure plate (312) corresponding to the ball seats on the first conical toothed plate (311); the second pressure plate assembly (41) comprises a second conical toothed plate (411) and a second pressure plate (412), a plurality of ball seats being correspondingly provided on the mounting surface of the second conical toothed plate (411), and a plurality of circular holes being provided on the second pressure plate (412) corresponding to the ball seats on the second conical toothed plate (411).

7. A through-axis bevel gear synchronous swash plate plunger pump according to claim 6, characterized in that: An annular platform with an inner spherical groove is provided on both the first pressure plate (312) and the second pressure plate (412), the annular platform on the first pressure plate (312) and the annular platform on the second pressure plate (412) are arranged opposite to each other, and the ball joint (6) is arranged in the inner spherical groove of the annular platforms arranged opposite to each other on the first pressure plate (312) and the second pressure plate (412).

8. A through-axis bevel gear synchronous swash plate plunger pump according to claim 7, characterized in that: The plunger assembly (5) comprises a corresponding plunger (51) and a plunger barrel (52); the ball head at the end of the plunger (51) is arranged in a ball seat between the first bevel gear disc (311) and the first pressure disc (312); the ball head at the end of the plunger barrel (52) is arranged in a ball seat between the second bevel gear disc (411) and the second pressure disc (412); the plunger (51) and the plunger barrel (52) are butt-jointed in a cylindrical pair connection manner.

9. A through-axis bevel gear synchronous swash plate plunger pump according to claim 8, characterized in that: An oil inlet (8) and an oil outlet (9) are provided in the housing (1), and the oil inlet (8) and the oil outlet (9) correspond to an oil inlet passage (42) and an oil outlet passage (43) on the first swash plate (3) or the second swash plate (4).

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