Inner curve radial plunger hydraulic motor

Abstract

The utility model relates to the technical field of hydraulic motors, and discloses an inner curve radial plunger hydraulic motor which comprises a cylinder body, a stator is arranged on the left side of the cylinder body in an attached mode, an end cover is fixedly connected to the left side of the stator, and a guide support is fixedly connected to the surface of the cylinder body. Locking supports are arranged on the inner wall of the guide support and the surface of the cylinder body in an attached mode, a fixing support is arranged on the inner wall of the guide support in an attached mode, the inner wall of the fixing support is fixedly connected with the surface of the end cover, and steel balls are arranged on the inner wall of the guide support, the inner walls of the locking supports and the inner wall of the fixing support in an attached mode; a threaded groove is formed in the upper surface of the cylinder body. According to the utility model, through the cooperation of the guide bracket, the locking bracket, the fixed bracket, the bolt and the thread groove, a user can complete the disassembly and assembly between the stator and the cylinder body only by rotating one bolt, so that the user can maintain parts in the motor more conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic motors, in particular to an internal curve radial piston hydraulic motor. Background Art

[0002] The internal curve radial piston hydraulic motor is a device that converts hydraulic energy into mechanical energy. The inner surface of the stator of the internal curve radial piston hydraulic motor is composed of several sections of inner curves with special shapes. The plunger blocks are installed on the rotor and can reciprocate radially. When high-pressure liquid enters the oil inlet of the motor, the liquid pressure acts on the bottom of the plunger blocks, pushing the plunger blocks to extend outwards. The head of the plunger block contacts the inner curve of the stator, and under the action of the inner curve of the stator, the force generated by the plunger blocks will cause the rotor to rotate. As the rotor rotates, the plunger blocks contact different parts of the inner curve of the stator in sequence, so as to achieve continuous rotational output.

[0003] At present, the internal curve radial piston hydraulic motors on the market are mainly composed of end covers, stators, cylinder blocks, bearings, transmission shafts, rotors, plunger blocks, rollers, oil distribution plates and oil distribution shafts. For example, an internal curve radial piston hydraulic motor disclosed in Chinese Patent Publication No. CN102338024B. However, since the end cover, stator and cylinder block are fixed by a plurality of bolts, it is rather troublesome to disassemble and assemble the end cover, stator and cylinder block, thus making it inconvenient for maintenance personnel to repair the parts inside the motor. At the same time, when transporting the motor, since the oil inlet passage and the oil outlet passage on the cylinder block need to be sealed by sealing plugs, and the sealing plugs need to be stored separately after being separated from the oil inlet passage and the oil outlet passage, when transporting the motor, it is often troublesome for users to seal the oil inlet passage and the oil outlet passage on the cylinder block because the sealing plugs cannot be found. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art, such as: at present, the internal curve radial piston hydraulic motors on the market are mainly composed of end covers, stators, cylinder blocks, bearings, transmission shafts, rotors, plunger blocks, rollers, oil distribution plates and oil distribution shafts. However, since the end cover, stator and cylinder block are fixed by a plurality of bolts, it is rather troublesome to disassemble and assemble the end cover, stator and cylinder block, thus making it inconvenient for maintenance personnel to repair the parts inside the motor. At the same time, when transporting the motor, since the oil inlet passage and the oil outlet passage on the cylinder block need to be sealed by sealing plugs, and the sealing plugs need to be stored separately after being separated from the oil inlet passage and the oil outlet passage, when transporting the motor, it is often troublesome for users to seal the oil inlet passage and the oil outlet passage on the cylinder block because the sealing plugs cannot be found. Therefore, an internal curve radial piston hydraulic motor is proposed.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] An internal curve radial piston hydraulic motor, comprising a cylinder block, a stator is attached to the left side of the cylinder block, an end cover is fixedly connected to the left side of the stator, a guide bracket is fixedly connected to the surface of the cylinder block, locking brackets are attached to both the inner wall of the guide bracket and the surface of the cylinder block, a fixed bracket is attached to the inner wall of the guide bracket, the inner wall of the fixed bracket is fixedly connected to the surface of the end cover, steel balls are attached to both the inner wall of the guide bracket, the inner wall of the locking bracket and the inner wall of the fixed bracket, a threaded groove is formed in the upper surface of the cylinder block, a bolt is threadedly connected to the inner wall of the threaded groove, the surface of the bolt contacts the inner wall of the locking bracket, a rotor assembly is fixedly connected to the surface of the end cover, the surface of the rotor assembly contacts the inner wall of the stator, a distribution shaft is fixedly connected to the right side of the rotor assembly, the surface of the distribution shaft contacts the inner wall of the cylinder block, an oil inlet passage is formed inside the cylinder block, and an oil outlet passage is formed inside the cylinder block.

[0007] Preferably, the guide bracket includes a first ring, the inner wall of the first ring is fixedly connected to the surface of the cylinder block, a groove is formed in the inner wall of the first ring, a first arc-shaped plate is fixedly connected to the inner wall of the groove, a tapered hole is formed in the inner wall of the first arc-shaped plate, the surface of the tapered hole contacts the surface of the steel ball, both the inner wall of the groove and the side of the first arc-shaped plate away from the cylinder block contact the surface of the fixed bracket, and both the inner wall of the groove and the side of the first arc-shaped plate close to the cylinder block contact the surface of the locking bracket.

[0008] Preferably, the locking bracket includes a second ring, the inner wall of the second ring contacts the surface of the cylinder block, a first through hole is formed in the upper surface of the second ring, the surface of the first through hole contacts the surface of the bolt, a second arc-shaped plate is fixedly connected to the left side of the second ring, the surface of the cylinder block, the inner wall of the groove and the side of the first arc-shaped plate close to the cylinder block all contact the surface of the second arc-shaped plate, a guide groove is formed in the side of the second arc-shaped plate away from the cylinder block, and the surface of the guide groove contacts the surface of the steel ball.

[0009] Preferably, the fixed bracket includes a third ring, the inner wall of the third ring is fixedly connected to the surface of the end cover, a third arc-shaped plate is fixedly connected to the right side of the third ring, both the inner wall of the groove and the side of the first arc-shaped plate away from the cylinder block contact the surface of the third arc-shaped plate, an arc-shaped groove is formed in the side of the third arc-shaped plate close to the cylinder block, and the surface of the arc-shaped groove contacts the surface of the steel ball.

[0010] Preferably, the rotor assembly includes a transmission shaft. First bearings are fixedly connected to the surface of the transmission shaft and the inner wall of the end cover. A rotor disc is sleeved on the surface of the transmission shaft through a spline. A plunger block is fitted to the inner wall of the rotor disc. Rollers are fitted to the inner walls of the plunger block and the stator. A oil distribution disc is fixedly connected to the right side of the rotor disc. The left side of the oil distribution shaft is fixedly connected to the right side of the oil distribution disc. The inner wall of the oil distribution shaft contacts the surface of the transmission shaft.

[0011] Preferably, a second bearing is fixedly connected to the inner wall of the cylinder block. A cylinder is fixedly connected to the inner wall of the second bearing. Scroll springs are fixedly connected to the surface of the cylinder and the inner wall of the cylinder block. A sealing disc is fixedly connected to the surface of the cylinder. A second through hole is formed in the interior of the sealing disc.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] (1) Through the cooperation of the bolt and the thread groove, the locking bracket can be fixed or unlocked in the present utility model. Meanwhile, when the locking bracket is fixed, the steel ball can be fixed in the arc groove on the fixed bracket through the locking bracket, and the stator can be fixed on the cylinder block through the cooperation of the steel ball and the arc groove. After the locking bracket is unlocked, by moving the locking bracket to the right, the steel ball can be separated from the tapered hole, and the third arc plate on the fixed bracket can be directly separated from the guiding bracket. Furthermore, through the cooperation of the guiding bracket, the locking bracket, the fixed bracket, the bolt and the thread groove, the user only needs to rotate one bolt to complete the disassembly and assembly between the stator and the cylinder block, thus making it more convenient for the user to repair the parts inside the motor.

[0014] (2) Through the cooperation of the second bearing, the cylinder, the scroll spring, the sealing disc and the second through hole, after the pipelines on the oil inlet passage and the oil outlet passage are disassembled, the second through hole can be automatically staggered from the oil inlet passage and the oil outlet passage, and the sealing disc automatically seals the oil inlet passage and the oil outlet passage, thereby making it more convenient for the user to seal the oil inlet passage and the oil outlet passage. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the structure of the present utility model;

[0016] Figure 2 is a front view of the guiding bracket in the utility model;

[0017] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in

[0018] Figure 4 is a left view of the locking bracket in the present utility model;

[0019] Figure 5 is Figure 4 the sectional view taken along line B-B in

[0020] Figure 6 the right view of the fixing bracket in the present utility model;

[0021] Figure 7 is Figure 6 the sectional view taken along line C-C in

[0022] Figure 8 the schematic diagram of the rotor assembly in the present utility model;

[0023] Figure 9 the left view of the sealing disc in the present utility model.

[0024] In the figure: 1. cylinder block; 2. stator; 3. end cover; 4. guiding bracket; 41. first ring; 42. groove; 43. first arc-shaped plate; 44. tapered hole; 5. locking bracket; 51. second ring; 52. first through hole; 53. second arc-shaped plate; 54. guiding groove; 6. fixing bracket; 61. third ring; 62. third arc-shaped plate; 63. arc-shaped groove; 7. steel ball; 8. threaded groove; 9. bolt; 10. rotor assembly; 101. transmission shaft; 102. first bearing; 103. rotor disc; 104. plunger block; 105. roller; 106. oil distribution disc; 11. oil distribution shaft; 12. oil inlet passage; 13. oil outlet passage; 14. second bearing; 15. cylinder; 16. scroll spring; 17. sealing disc; 18. second through hole. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 a limitation to the present utility model.

[0027] Embodiment 1:

[0028] Refer to Figure 1-8, internal curve radial piston hydraulic motor, including a cylinder block 1, a stator 2 is attached to the left side of the cylinder block 1, an end cover 3 is fixedly connected to the left side of the stator 2, a guide bracket 4 is fixedly connected to the surface of the cylinder block 1, locking brackets 5 are attached to both the inner wall of the guide bracket 4 and the surface of the cylinder block 1, a fixed bracket 6 is attached to the inner wall of the guide bracket 4, the inner wall of the fixed bracket 6 is fixedly connected to the surface of the end cover 3, steel balls 7 are attached to both the inner wall of the guide bracket 4, the inner wall of the locking bracket 5 and the inner wall of the fixed bracket 6, a threaded groove 8 is opened on the upper surface of the cylinder block 1, a bolt 9 is threadedly connected to the inner wall of the threaded groove 8, the surface of the bolt 9 contacts the inner wall of the locking bracket 5, a rotor assembly 10 is fixedly connected to the surface of the end cover 3, the surface of the rotor assembly 10 contacts the inner wall of the stator 2, a distribution shaft 11 is fixedly connected to the right side of the rotor assembly 10, the surface of the distribution shaft 11 contacts the inner wall of the cylinder block 1, an oil inlet passage 12 is opened inside the cylinder block 1, and an oil outlet passage 13 is opened inside the cylinder block 1.

[0029] The guide bracket 4 includes a first ring 41, the inner wall of the first ring 41 is fixedly connected to the surface of the cylinder block 1, a groove 42 is opened on the inner wall of the first ring 41, a first arc plate 43 is fixedly connected to the inner wall of the groove 42, a tapered hole 44 is opened inside the first arc plate 43, the inner wall of the tapered hole 44 contacts the surface of the steel ball 7, both the inner wall of the groove 42 and the side of the first arc plate 43 away from the cylinder block 1 contact the surface of the fixed bracket 6, and both the inner wall of the groove 42 and the side of the first arc plate 43 close to the cylinder block 1 contact the surface of the locking bracket 5.

[0030] The locking bracket 5 includes a second ring 51, the inner wall of the second ring 51 contacts the surface of the cylinder block 1, a first through hole 52 is opened on the upper surface of the second ring 51, the inner wall of the first through hole 52 contacts the surface of the bolt 9, a second arc plate 53 is fixedly connected to the left side of the second ring 51, the surface of the cylinder block 1, the inner wall of the groove 42 and the side of the first arc plate 43 close to the cylinder block 1 all contact the surface of the second arc plate 53, the second arc plate 53 is positioned by the first arc plate 43 and the groove 42, a guide groove 54 is opened on the side of the second arc plate 53 away from the cylinder block 1, the inner wall of the guide groove 54 contacts the surface of the steel ball 7, the guide groove 54 is a stepped groove, when the bolt 9 passes through the first through hole 52 and is screwed into the threaded groove 8, the second ring 51 can be fixed on the cylinder block 1 through the cooperation of the bolt 9 and the threaded groove 8, and the steel ball 7 can be fixed in the tapered hole 44 through the guide groove 54. When the bolt 9 is separated from the threaded groove 8, by moving the second ring 51 to the right, the steel ball 7 can be separated from the tapered groove.

[0031] The fixing bracket 6 includes a third circular ring 61, the inner wall of the third circular ring 61 is fixedly connected to the surface of the end cover 3, and the right side of the third circular ring 61 is fixedly connected to a third curved plate 62. The inner wall of the groove 42 and the side of the first curved plate 43 away from the cylinder body 1 are in contact with the surface of the third curved plate 62. The third curved plate 62 is provided with an arc groove 63 on the side close to the cylinder body 1. The inner wall of the arc groove 63 is in contact with the surface of the steel ball 7. When the steel ball 7 is fixed in the conical groove, the third curved plate 62 can be fixed in the groove 42 through the cooperation of the steel ball 7 and the arc groove 63, and the stator 2 and the cylinder body 1 are fixed together. When the steel ball 7 is separated from the tapered hole 44, the third curved plate 62 can be directly removed from the groove 42.

[0032] The rotor assembly 10 includes a transmission shaft 101. The surface of the transmission shaft 101 and the inner wall of the end cover 3 are fixedly connected to a first bearing 102. The surface of the transmission shaft 101 is provided with a rotor disk 103 through a spline sleeve. The surface of the transmission shaft 101 is provided with a spline groove. The inner wall of the rotor disk 103 is provided with spline teeth. Through the cooperation of the spline groove and the spline teeth, the rotor disk 103 and the transmission shaft 101 can rotate together. A plunger block 104 is fitted on the inner wall of the rotor disk 103. Rollers 105 are fitted on the inner wall of the plunger block 104 and the inner wall of the stator 2. An oil distribution plate 106 is fixedly connected to the right side of the rotor disk 103. The left side of the oil distribution shaft 11 is fixedly connected to the right side of the oil distribution plate 106. The inner wall of the oil distribution shaft 11 contacts the surface of the transmission shaft 101.

[0033] Embodiment 2:

[0034] Reference Figure 1-9 The inner wall of the cylinder body 1 is fixedly connected with a second bearing 14, the inner wall of the second bearing 14 is fixedly connected with a cylinder 15, the surface of the cylinder 15 and the inner wall of the cylinder body 1 are fixedly connected with a volute spring 16, the surface of the cylinder 15 is fixedly connected with a sealing disc 17, and a second through hole 18 is opened inside the sealing disc 17. When the user needs to install the pipeline on the oil inlet channel 12 and the oil outlet channel 13, by rotating the cylinder 15, the second through hole 18 can be aligned with the oil inlet channel 12 and the oil outlet channel 13. The channel 13 is aligned, and the pipeline can pass through the second through hole 18 and contact the oil inlet channel 12 and the oil outlet channel 13. When the pipelines on the oil inlet channel 12 and the oil outlet channel 13 are disassembled, the second through hole 18 can be automatically staggered with the oil inlet channel 12 and the oil outlet channel 13 through the elastic force of the spiral spring 16, and the oil inlet channel 12 and the oil outlet channel 13 are automatically sealed by the sealing disc 17, thereby making it more convenient for the user to seal the oil inlet channel 12 and the oil outlet channel 13.

[0035] In the present utility model, when a user uses the motor, hydraulic oil sequentially enters the rotor disc 103 through the oil inlet passage 12, the oil distribution shaft 11, and the oil distribution disc 106, and the hydraulic oil causes the plunger block 104 to move within the rotor disc 103. Then, the cooperation of the plunger block 104, the roller 105, and the stator 2 causes the transmission shaft 101 to rotate. At the same time, the hydraulic oil that enters the rotor disc 103 is discharged sequentially through the oil distribution disc 106, the oil distribution shaft 11, and the oil outlet passage 13. When internal parts of the motor need to be repaired, first, the bolt 9 is screwed out from the threaded groove 8, and then, by moving the second ring 51 to the right, the steel ball 7 is separated from the tapered hole 44, and by moving the third ring 61 to the left, the stator 2 is separated from the cylinder block 1. At this time, the internal parts of the motor can be repaired. When the motor needs to be assembled, first, the third arc-shaped plate 62 is inserted into the groove 42, and the right side of the stator 2 is brought into contact with the left side of the cylinder block 1. Then, by moving the second ring 51 to the left, the second arc-shaped plate 53 is moved to the left, and the steel ball 7 is fixed in the arc-shaped groove 63 through the guide groove 54. At this time, through the cooperation of the arc-shaped groove 63 and the steel ball 7, the third arc-shaped plate 62 is fixed on the guide bracket 4, and the stator 2 is fixed on the cylinder block 1.

[0036] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

Claims

1. Internal curve radial piston hydraulic motor, including a cylinder block (1), characterized in that, A stator (2) is attached to the left side of the cylinder block (1). A end cover (3) is fixedly connected to the left side of the stator (2). A guide bracket (4) is fixedly connected to the surface of the cylinder block (1). A locking bracket (5) is attached to both the inner wall of the guide bracket (4) and the surface of the cylinder block (1). A fixing bracket (6) is attached to the inner wall of the guide bracket (4). The inner wall of the fixing bracket (6) is fixedly connected to the surface of the end cover (3). Steel balls (7) are attached to the inner walls of the guide bracket (4), the locking bracket (5), and the fixing bracket (6). A threaded groove (8) is formed in the upper surface of the cylinder block (1). A bolt (9) is threadedly connected to the inner wall of the threaded groove (8). The surface of the bolt (9) contacts the inner wall of the locking bracket (5). A rotor assembly (10) is fixedly connected to the surface of the end cover (3). The surface of the rotor assembly (10) contacts the inner wall of the stator (2). A oil distribution shaft (11) is fixedly connected to the right side of the rotor assembly (10). The surface of the oil distribution shaft (11) contacts the inner wall of the cylinder block (1). An oil inlet passage (12) is formed inside the cylinder block (1). An oil outlet passage (13) is formed inside the cylinder block (1).

2. The internal curve radial piston hydraulic motor according to claim 1, wherein The guide bracket (4) includes a first ring (41). The inner wall of the first ring (41) is fixedly connected to the surface of the cylinder block (1). A groove (42) is formed in the inner wall of the first ring (41). A first arc-shaped plate (43) is fixedly connected to the inner wall of the groove (42). A tapered hole (44) is formed inside the first arc-shaped plate (43). The inner wall of the tapered hole (44) contacts the surface of the steel ball (7). The inner wall of the groove (42) and the side of the first arc-shaped plate (43) away from the cylinder block (1) both contact the surface of the fixing bracket (6). The inner wall of the groove (42) and the side of the first arc-shaped plate (43) close to the cylinder block (1) both contact the surface of the locking bracket (5).

3. The internal curve radial piston hydraulic motor according to claim 2, characterized in that, The locking bracket (5) includes a second ring (51). The inner wall of the second ring (51) contacts the surface of the cylinder block (1). A first through hole (52) is formed in the upper surface of the second ring (51). The inner wall of the first through hole (52) contacts the surface of the bolt (9). A second arc-shaped plate (53) is fixedly connected to the left side of the second ring (51). The surface of the cylinder block (1), the inner wall of the groove (42), and the side of the first arc-shaped plate (43) close to the cylinder block (1) all contact the surface of the second arc-shaped plate (53). A guide groove (54) is formed in the side of the second arc-shaped plate (53) away from the cylinder block (1). The inner wall of the guide groove (54) contacts the surface of the steel ball (7).

4. The inner curve radial piston hydraulic motor according to claim 2, characterized in that, The fixed bracket (6) includes a third ring (61), the inner wall of the third ring (61) is fixedly connected to the surface of the end cover (3), the right side of the third ring (61) is fixedly connected to a third arc-shaped plate (62), the inner wall of the groove (42) and the side of the first arc-shaped plate (43) away from the cylinder block (1) are both in contact with the surface of the third arc-shaped plate (62), an arc-shaped groove (63) is formed on the side of the third arc-shaped plate (62) close to the cylinder block (1), and the inner wall of the arc-shaped groove (63) is in contact with the surface of the steel ball (7).

5. The internal curve radial piston hydraulic motor according to claim 1, characterized in that, The rotor assembly (10) includes a transmission shaft (101), first bearings (102) are fixedly connected to the surface of the transmission shaft (101) and the inner wall of the end cover (3), a rotor disc (103) is sleeved on the surface of the transmission shaft (101) through a spline, a plunger block (104) is fitted on the inner wall of the rotor disc (103), rollers (105) are fitted on the inner walls of the plunger block (104) and the stator (2), a distribution disc (106) is fixedly connected to the right side of the rotor disc (103), the left side of the distribution shaft (11) is fixedly connected to the right side of the distribution disc (106), and the inner wall of the distribution shaft (11) is in contact with the surface of the transmission shaft (101).

6. The inner curve radial piston hydraulic motor according to claim 1, characterized in that, A second bearing (14) is fixedly connected to the inner wall of the cylinder block (1), a cylinder (15) is fixedly connected to the inner wall of the second bearing (14), scroll springs (16) are fixedly connected to the surface of the cylinder (15) and the inner wall of the cylinder block (1), a sealing disc (17) is fixedly connected to the surface of the cylinder (15), and a second through hole (18) is formed inside the sealing disc (17).

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