Hydraulic motor

Abstract

The invention provides a hydraulic motor. The hydraulic motor comprises a top cover assembly, an upper bearing assembly, a driving assembly, a lower bearing assembly and a lower sealing cover assembly which are sequentially connected in the axial direction of the hydraulic motor. The driving assembly comprises a first transmission assembly which is coaxially arranged with the top cover assembly; the first transmission assembly is movably connected with the upper bearing assembly and the lower bearing assembly. The first transmission assembly is provided with a first water inlet end and a water conveying end. The first water inlet end penetrates through the upper bearing assembly, and the water conveying end sequentially penetrates through the lower bearing assembly and the lower sealing cover assembly. The upper bearing assembly is hermetically connected with the top cover assembly; the top cover assembly is provided with a second water inlet end and a sealed water outlet end which are communicated with each other; in the axial direction of the first transmission assembly, the sealing water outlet end and the end of the first transmission assembly are in sealing connection in a relatively rotating mode through a sealing assembly. The axial size of the hydraulic motor is reduced, and the hydraulic motor can bear axial and radial counter-acting force and has good stability.

Description

Technical Field

[0001] The invention relates to the field of deep cleaning equipment, in particular to a hydraulic motor. Background Art

[0002] Existing road surface deep cleaning equipment generally integrates a high-pressure cleaning device on a vehicle. When the vehicle is moving, the high-pressure cleaning device performs high-pressure cleaning on the road surface that the vehicle passes. Among them, the high-pressure cleaning device includes a rotary joint, and the high-pressure water flow is input from a stationary pipe to the internal channel of the rotary joint to realize the conversion of the high-pressure water flow from the stationary part to the rotating part. Most of the current rotary joints are self-rotating structures, that is, the rotary joint is rotated by generating a reaction force through a water jet. The rotation speed is related to the pressure and flow rate of the high-pressure water jet. This self-rotating rotary joint cannot accurately control the rotation speed. If you want to improve the control accuracy of the rotary joint speed, you need to add a driving component to the outside of the rotary joint, and cooperate with transmission parts such as belts and gears to realize the rotation of the rotary joint, such as the Chinese patent document with publication number CN110924337A. In addition, some existing technologies use a hydraulic motor to penetrate the sprinkler head to convert static high-pressure water into a rotating high-pressure water jet, such as the Chinese patent document with publication number CN101965234B. In this patent document, due to the use of a gear motor with a bidirectional output shaft, the gear motor cannot withstand axial and radial impact forces, and a bearing seat that can withstand axial and radial forces must be added to the outside of the gear motor, resulting in a longer overall axial dimension, which makes this structure unable to be used on small-tonnage deep cleaning operation vehicles. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulic motor which can be applied to small-tonnage deep cleaning operation vehicles under the premise that the motor can withstand axial and radial impact forces.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A hydraulic motor comprises a top cover assembly, an upper bearing assembly, a drive assembly, a lower bearing assembly and a lower cover assembly which are sequentially connected along the axial direction of the hydraulic motor;

[0006] The driving assembly includes a first transmission assembly coaxially arranged with the top cover assembly;

[0007] The first transmission assembly is movably connected to the upper bearing assembly and the lower bearing assembly respectively;

[0008] The first transmission assembly has a first water inlet end and a water delivery end;

[0009] The first water inlet end is arranged through the upper bearing assembly, and the water delivery end is arranged through the lower bearing assembly and the lower cover assembly in sequence;

[0010] The upper bearing assembly is sealed and connected to the top cover assembly;

[0011] The top cover assembly has a second water inlet end and a sealed water outlet end that are interconnected;

[0012] In the axial direction of the first transmission assembly, the sealed water outlet end is sealed and connected to the end of the first transmission assembly via a sealing assembly so as to be relatively rotatable;

[0013] In the direction from the upper bearing assembly to the lower bearing assembly, the second water inlet end, the sealed water outlet end, the first water inlet end and the water delivery end are connected in sequence.

[0014] The beneficial effect of the present invention is that the upper bearing assembly and the lower bearing assembly are integrated with the driving assembly, and the upper bearing assembly and the lower cover assembly are arranged to keep the upper bearing assembly and the lower bearing assembly stable. In order to reduce the axial length of the first transmission assembly, the end of the first transmission assembly is inserted into the top cover assembly. Since the top cover assembly and the first transmission assembly will rotate relative to each other, the top cover assembly and the end of the first transmission assembly of the driving assembly are sealed and connected by the sealing assembly, which can ensure the sealing between the top cover assembly and the first transmission assembly, and can reduce the axial size of the hydraulic motor, and ensure the sealing between the first transmission assembly and the top cover assembly, and ensure that the water flows through the top cover assembly and the first transmission assembly and then sprays out. Compared with the prior art, the axial length of the hydraulic motor is shortened as a whole due to the shortening of the axial length of the first transmission assembly and the integration of the upper bearing assembly and the lower bearing assembly with the driving assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial structural schematic diagram of the hydraulic motor in the present invention;

[0016] Figure 2 is a cross-sectional view of the hydraulic motor of the present invention;

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

[0018] Figure 4 for Figure 2 A magnified view of part A;

[0019] Figure 5 It is a structural schematic diagram of the upper sealing ring in the present invention;

[0020] Figure 6 It is a structural schematic diagram of the top cover assembly in the present invention;

[0021] Figure 7 for Figure 6 Sectional view of the AA plane;

[0022] Figure 8 for Figure 6 Sectional view and partial enlarged view of the middle BB surface;

[0023] Fig. 9 It is a structural schematic diagram of the upper bearing assembly in the present invention;

[0024] Fig.10 is a cross-sectional view of the upper bearing assembly of the present invention;

[0025] Fig.11 It is a structural schematic diagram of the first sealing ring in the present invention;

[0026] Fig.12 It is a schematic diagram of the local structure of the driving component in the present invention;

[0027] Fig.13 It is a structural schematic diagram of the first transmission assembly in the present invention;

[0028] Fig.14 It is a structural schematic diagram of the floating side plate in the present invention;

[0029] Fig.15 It is a structural schematic diagram of the lower bearing assembly in the present invention;

[0030] Fig.16 for Fig.15 Sectional view of the middle DD plane;

[0031] Fig.17 for Fig.15 Sectional view of the middle CC plane;

[0032] Fig.18 is a cross-sectional view of the lower cover assembly of the present invention;

[0033] Fig.19 It is a structural schematic diagram of the second transmission assembly in the present invention;

[0034] Fig. 20 is a cross-sectional view of the second transmission assembly in the present invention;

[0035] Fig.21 It is a side view of the spray boom in the present invention.

[0036] Description of labels:

[0037] 1. Top cover assembly; 11. Second water inlet end; 12. Sealed water outlet end; 13. First sealing groove; 14. Drain channel; 15. Limiting groove;

[0038] 2. upper bearing assembly; 21. upper bearing seat; 211. bearing receiving groove; 212. third sealing groove; 22. upper bearing body; 23. first sealing ring; 24. second sealing ring;

[0039] 3. Driving assembly; 31. First transmission assembly; 311. First water inlet end; 312. Water delivery end; 313. First transmission shaft; 314. First gear; 315. Second sealing groove; 316. Water passage; 32. Housing; 321. Motor cavity; 322. Speed ​​measuring channel; 33. Second transmission assembly; 331. Second transmission shaft; 332. Second gear; 34. Floating side plate; 341. Oil drain groove; 342. Groove; 343. Blocking member; 35. Snap ring;

[0040] 4. lower bearing assembly; 41. lower bearing seat; 42. lower bearing body; 43. third sealing ring;

[0041] 5. Lower cover assembly; 51. Lower cover body; 511. Fourth sealing groove; 52. Fourth sealing ring; 53. Fifth sealing ring;

[0042] 6. Sealing assembly; 61. Upper plugging assembly; 611. Upper sealing ring; 612. Upper sealing ring; 613. Upper corrugated elastic member; 614. Position limiting portion; 615. Upper raised portion; 62. Lower plugging assembly; 621. Lower sealing ring; 622. Lower sealing ring; 623. Lower corrugated elastic member; 624. Lower raised portion;

[0043] 7. spray rod; 71. rod body; 72. first nozzle; 73. second nozzle;

[0044] 8. Oil inlet connector; 9. Oil outlet connector; 10. Speed ​​sensor; 20. Screw; 30. Pin; DETAILED DESCRIPTION

[0045] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0046] Please refer to Figure 1-Figure 21A hydraulic motor comprises a top cover assembly 1, an upper bearing assembly 2, a driving assembly 3, a lower bearing assembly 4 and a lower cover assembly 5 which are sequentially connected along the axial direction of the hydraulic motor; the driving assembly 3 comprises a first transmission assembly 31 which is coaxially arranged with the top cover assembly 1; the first transmission assembly 31 is movably connected with the upper bearing assembly 2 and the lower bearing assembly 4 respectively; the first transmission assembly 31 comprises a first water inlet end 311 and a water delivery end 312; the first water inlet end 311 is arranged through the upper bearing assembly 2, and the water delivery end 312 is sequentially arranged through the lower bearing assembly 4 and the lower cover assembly 5; the upper bearing assembly 2 is sealedly connected with the top cover assembly 1; the top cover assembly 1 comprises a second water inlet end 11 and a sealed water outlet end 12 which are interconnected; in the axial direction of the first transmission assembly 31, the sealed water outlet end 12 is relatively rotatably sealedly connected with the end of the first transmission assembly 31 through a sealing assembly 6; in the direction from the upper bearing assembly 2 to the lower bearing assembly 4, the second water inlet end 11, the sealed water outlet end 12, the first water inlet end 311 and the water delivery end 312 are sequentially connected. Specifically, the first transmission assembly 31 includes a first transmission shaft 313 and a first gear 314 that are integrally formed and coaxially arranged, wherein the first water inlet end 311 and the water delivery end 312 of the first transmission assembly 31 are respectively located at the two ends of the first transmission shaft 313. The water delivery end 312 is provided with a thread for connecting the spray rod 7 with the first transmission shaft 313 to realize that the high-pressure water changes from a static state to a rotating state. The spray rod 7 includes a rod body 71, a first nozzle 72 and a second nozzle 73, and the first nozzle 72 and the second nozzle 73 are respectively arranged at the two ends of the axial direction of the spray rod 7; in the axial direction of the spray rod 7, the axis of the first nozzle 72 forms an acute angle with the axis of the second nozzle 73. And the angle α formed between the axis of the first nozzle 72 and the ground is 60° to 75°, and similarly, the angle formed between the axis of the second nozzle 73 and the ground is also 60° to 75°. After the high-pressure water is sprayed out from the first nozzle 72 and the second nozzle 73, a reaction force is generated in the axial and radial directions of the hydraulic motor, which may damage the gears in the drive assembly 3 and cause the hydraulic motor to malfunction. The upper bearing assembly 2 and the lower bearing assembly 4 are provided to withstand the reaction force generated on the hydraulic motor after the high-pressure water is sprayed out, and to protect the gears in the drive assembly 3.

[0047] It can be understood that, in the present invention, by integrating the upper bearing assembly 2 and the lower bearing assembly 4 with the drive assembly 3, and by setting the top cover assembly 1 and the lower cover assembly 5, the upper bearing assembly 2 and the lower bearing assembly 4 are kept stable, and the hydraulic motor can withstand radial and axial reaction forces, thereby extending the service life of the hydraulic motor. In order to reduce the axial length of the first transmission assembly 31, it is achieved by inserting the end of the first transmission assembly 31 into the top cover assembly 1. Since the top cover assembly 1 and the first transmission assembly 31 will rotate relative to each other, the top cover assembly 1 and the end of the first transmission assembly 31 of the drive assembly 3 are sealed and connected by the sealing assembly 6, which can ensure the sealing between the top cover assembly 1 and the first transmission assembly 31, which can reduce the axial size of the hydraulic motor, ensure the sealing between the first transmission assembly 31 and the top cover assembly 1, and ensure that the water flows through the top cover assembly 1 and the first transmission assembly 31 and then sprays out. Compared with the prior art, due to the shortening of the axial length of the first transmission assembly 31 and the integration of the upper bearing assembly 2 and the lower bearing assembly 4 with the drive assembly 3, the overall axial length of the hydraulic motor is shortened.

[0048] In some embodiments, a first sealing groove 13 is provided on the side of the top cover assembly 1 facing the upper bearing assembly 2; a second sealing groove 315 is provided on the first water inlet end 311; the sealing assembly 6 includes an upper plugging assembly 61 and a lower plugging assembly 62; the upper plugging assembly 61 is embedded in the first sealing groove 13; the lower plugging assembly 62 is embedded in the second sealing groove 315; the upper plugging assembly 61 and the lower plugging assembly 62 can be relatively rotatable against each other. The first sealing groove 13 is located on the end surface of one end where the first transmission shaft 313 is connected to the top cover assembly 1. The sealing performance between the top cover assembly 1 and the first transmission shaft 313 is improved by the sealed connection between the upper plugging assembly 61 and the lower plugging assembly 62.

[0049] In some embodiments, the upper sealing assembly 61 includes an upper sealing ring 611, an upper sealing ring 612 and an upper corrugated elastic member 613; the upper sealing ring 612 is embedded in the first sealing groove 13; in the radial direction of the first sealing groove 13, the upper sealing ring 611 is sandwiched between the outer wall of the upper sealing ring 612 and the inner wall of the first sealing groove 13; in the axial direction of the first sealing groove 13, the upper corrugated elastic member 613 is sandwiched between the upper sealing ring 612 and the inner wall of the first sealing groove 13. Specifically, the axial section of the upper sealing ring 612 is convex, and the circumferential side wall of the upper sealing ring 612 is provided with an outwardly convex limiting portion 614. Correspondingly, the first sealing groove 13 matches the upper sealing ring 612, and the limiting portion 614 limits the rotational freedom of the sealing ring in the first sealing groove 13 through a concave-convex matching structure, thereby improving the sealing reliability.

[0050] In some embodiments, the lower plugging assembly 62 includes a lower sealing ring 621, a lower sealing ring 622 and a lower corrugated elastic member 623; the lower sealing ring 622 is embedded in the second sealing groove 315; in the radial direction of the second sealing groove 315, the lower sealing ring 621 is sandwiched between the outer wall of the lower sealing ring 622 and the side wall of the second sealing groove 315; in the axial direction of the second sealing groove 315, the lower corrugated elastic member 623 is sandwiched between the lower sealing ring 622 and the top wall of the second sealing groove 315. Preferably, the upper plugging assembly 61 and the lower plugging assembly 62 have the same structure and are symmetrically distributed. Preferably, the upper corrugated elastic member 613 and the lower corrugated elastic member 623 are both corrugated springs. Since the lower sealing ring 622 may cause wear on the upper sealing ring 612 and / or the lower sealing ring 622 after a long period of rotation relative to the upper sealing ring 612, the corrugated spring is provided to apply axial pressure to the upper sealing ring 612 and the lower sealing ring 622, respectively, to automatically compensate for the gaps on the upper sealing ring 612 and / or the lower sealing ring 622 caused by wear, so that the upper sealing ring 612 and the lower sealing ring 622 always maintain a pressed state to ensure sealing.

[0051] In some embodiments, an upper protrusion 615 is provided on one side of the upper plugging component 61 facing the lower plugging component 62; a lower protrusion 624 is provided on one side of the lower plugging component 62 facing the upper plugging component 61; the upper protrusion 615 and the lower protrusion 624 can rotate relative to each other and press against each other; the diameter of the upper protrusion 615 and the diameter of the lower protrusion 624 are both smaller than the maximum diameter of the lower sealing ring 622. The upper protrusion 615 and the lower protrusion 624 are provided to provide sufficient loss for the upper sealing ring 612 and the lower sealing ring 622 to ensure sealing performance.

[0052] In some embodiments, the top cover assembly 1 is provided with a drainage channel 14; the drainage channel 14 is distributed along the radial direction of the top cover assembly 1 and communicated with the first sealing groove 13 of the top cover assembly 1. The drainage channel 14 is provided to provide a pressure relief channel for high-pressure water after the sealing assembly 6 moves relatively for a long time and is worn, and can also serve to remind the operator to replace the sealing assembly 6 in time to ensure the water discharge effect of the spray rod 7.

[0053] In some embodiments, a limiting groove 15 is further provided on one side of the top cover assembly 1 facing the upper bearing assembly 2; the limiting groove 15 is coaxially arranged with the first sealing groove 13; the first transmission assembly 31 is rotatably embedded in the limiting groove 15; the water inlet end of the drain channel 14 is respectively connected with the first sealing groove 13 and the limiting groove 15. The cooperation between the limiting groove 15 and the first transmission assembly 31 limits the radial degree of freedom of the first transmission assembly 31, thereby improving the transmission reliability of the hydraulic motor.

[0054] In some embodiments, the upper bearing assembly 2 includes an upper bearing seat 21, an upper bearing body 22, a first sealing ring 23 and a second sealing ring 24; a bearing receiving groove 211 and a third sealing groove 212 are provided on the side of the upper bearing seat 21 facing the top cover assembly 1, and the bearing receiving groove 211 and the third sealing groove 212 are coaxially arranged; the first sealing ring 23 is embedded in the side of the upper bearing seat 21 facing the lower bearing assembly 4; the upper bearing body 22 is embedded in the bearing receiving groove 211; the second sealing ring 24 is embedded in the third sealing groove 212 and is sandwiched between the upper bearing body 22 and the top cover assembly 1. For details, refer to Fig.10 , the first sealing ring 23 has one side of the groove (such as Fig.11 As shown in the figure, the upper bearing body 22 is arranged toward the side where the upper bearing body 22 is located. Preferably, the upper bearing body 22 is a maintenance-free bearing.

[0055] In some embodiments, the drive assembly 3 further includes a housing 32 and a second transmission assembly 33; the upper bearing assembly 2 and the lower bearing assembly 4 are enclosed with the housing 32 to form a motor cavity 321; the axes of the first transmission assembly 31 and the second transmission assembly 33 are parallel to each other, and the first transmission assembly 31 and the second transmission assembly 33 are sequentially arranged along the length direction of the housing 32; the oil inlet joint 8 and the oil outlet joint 9 are respectively arranged on both sides of the width direction of the housing 32; the oil inlet joint 8 and the oil outlet joint 9 are respectively connected to the motor cavity 321; the second transmission assembly 33 has an oil drain channel, which is connected to the motor cavity 321; the second transmission assembly 33 is arranged in the motor cavity 321, and the first transmission assembly 31 is arranged through the motor cavity 321; the first transmission assembly 31 has a water passage 316 connecting the first water inlet end 311 and the water delivery end 312. Specifically, the second transmission assembly 33 includes a coaxially arranged second transmission shaft 331 and a second gear 332, and the first gear 314 is meshed with the second gear 332. The first transmission assembly 31 and the second transmission assembly 33 are disposed through the first sealing ring 23 at the same time.

[0056] In some embodiments, the drive assembly 3 further includes a floating side plate 34; in the height direction of the housing 32, a floating side plate 34 is respectively provided on both sides of the motor cavity 321; the lower bearing assembly 4 and the upper bearing assembly 2 are respectively pressed against the corresponding floating side plates 34; the floating side plate 34 is provided with an oil drain groove 341 on the side facing the motor cavity 321, and the motor cavity 321 is connected to the oil outlet joint 9 through the oil drain groove 341. Specifically, a groove 342 is provided on the side of the floating side plate 34 away from the motor cavity 321, and in the width direction of the floating side plate 34; a blocking member 343 is centrally arranged in the groove 342, and the blocking member 343 divides the groove 342 into two, and the end face of the blocking member 343 is flush with the surface of the side of the floating side plate 34 away from the motor cavity 321.

[0057] In some embodiments, a speed sensor 10 is further included; the speed sensor 10 is arranged on the housing 32 and is located on the same side as the oil outlet connector 9; the sensing end of the speed sensor 10 is arranged opposite to the second transmission assembly 33. Specifically, a speed measuring channel 322 for installing the speed sensor 10 is opened on the side wall of the housing 32, the speed measuring channel 322 is connected to the motor cavity 321, and the speed measuring channel 322 is arranged opposite to the second transmission assembly 33. The housing 32 has an oil inlet side and an oil return side, the speed sensor 10 and the oil outlet connector 9 are both arranged on the oil return side, and the oil inlet connector 8 is arranged on the oil inlet side.

[0058] High-pressure hydraulic oil will enter the motor cavity 321 from the oil inlet joint 8. Under the action of the high-pressure hydraulic oil, the first transmission assembly 31 and the second transmission assembly 33 rotate. At the same time, high-pressure water enters the first transmission shaft 313 from the top cover assembly 1. Due to the sealing effect of the sealing assembly 6, the high-pressure water flows through the water passage 316 in the first transmission shaft 313 and enters the spray rod 7 from the water delivery end 312. At this time, the high-pressure water is converted from a static state to a rotating spraying state.

[0059] Since a certain angle is formed between the first nozzle 72 and the second nozzle 73 and the ground, under the reaction force of the high-pressure water jet, the spray rod 7 as a whole will generate a rotational torque and push the first transmission component 31 to rotate, causing the gear rotation speed in the first transmission component 31 to exceed the speed, and different rotational torques will be generated due to different high-pressure water pressures. The setting of the speed sensor 10 can be used to monitor the speed of the drive component 3 in real time, so as to adjust the speed and water inlet pressure of the drive component 3. The speed n of the hydraulic motor can be obtained by the number of teeth n1 of the second gear 332 and the speed n2 measured by the speed sensor 10:

[0060]

[0061] Due to the effect of the high-pressure water on the gears and the spray bar 7 in the drive assembly 3, the high-pressure water will generate a ring-shaped high-pressure water jet area on the ground, and the distance of the ring is S. At this time, the vehicle performs ultra-low speed constant speed operation at the speed υ. To ensure the cleaning effect, each high-pressure water jet area must be tangent or overlapped along the vehicle's forward direction. The more the ring areas overlap, the better the cleaning effect. At this time, the vehicle speed υ and the motor speed n have the following relationship:

[0062]

[0063] n——motor speed, r / min;

[0064] t——time, s;

[0065] S——distance, m.

[0066] According to the above formula,

[0067] In some embodiments, the lower bearing assembly 4 includes a lower bearing seat 41, a lower bearing body 42 and a third sealing ring 43; the lower bearing body 42 is embedded in the side of the lower bearing seat 41 away from the driving assembly 3, and the third sealing ring 43 is embedded in the side of the lower bearing seat 41 facing the driving assembly 3, and the third sealing ring 43 can press against the driving assembly 3. Preferably, the lower bearing body 42 is an angular contact ball bearing to improve the radial and axial pressure bearing capacity of the lower bearing body 42 on the first transmission shaft 313. The third sealing ring 43 is provided to improve the sealing between the driving assembly 3 and the lower bearing seat 41 to prevent hydraulic oil leakage. Among them, the first transmission shaft 313 is provided with a retaining ring 35 on the outer sleeve, and the retaining ring 35 is located on the side of the first gear 314 away from the upper bearing assembly 2. The retaining ring 35 presses against the side of the lower bearing body 42 away from the upper bearing assembly 2 to limit the axial freedom of the retaining bearing body and improve the structural stability. In addition, the lower bearing body 42 shares hydraulic oil with the first transmission assembly 31 and the second transmission assembly 33 , and the hydraulic oil enters the lower bearing body 42 and acts as a lubricant for the lower bearing body 42 , so that the lubricant in the lower bearing body 42 is low-pressure hydraulic oil.

[0068] In some embodiments, the lower cover assembly 5 includes a lower cover body 51, a fourth sealing ring 52 and a fifth sealing ring 53; the lower cover body 51 is connected to the lower bearing seat 41 by screws 20, and one end of the lower cover body 51 facing the drive assembly 3 is embedded in the lower bearing seat 41, and a fourth sealing groove 511 is opened on the side of the lower cover body 51 facing the drive assembly 3, the fourth sealing ring 52 is embedded in the fourth sealing groove 511, and the fourth sealing ring 52 is in sealing contact with the circumferential side wall of the first transmission assembly 31, so as to achieve the first transmission shaft 313 to maintain a seal with the lower cover body 51 during rotation; and the fifth sealing ring 53 is sleeved on the outside of the part of the lower cover body 51 facing the drive assembly 3 and clamped between the outer wall of the lower cover body 51 and the lower bearing seat 41. The fifth sealing ring 53 is provided to prevent the hydraulic oil in the motor cavity 321 from leaking out, so as to ensure the overall sealing of the hydraulic motor.

[0069] Embodiment 1 of the present invention is:

[0070] A hydraulic motor comprises a top cover assembly 1, an upper bearing assembly 2, a drive assembly 3, a lower bearing assembly 4 and a lower cover assembly 5 which are sequentially connected along the axial direction of the hydraulic motor; the drive assembly 3 comprises a first transmission assembly 31 which is coaxially arranged with the top cover assembly 1; the first transmission assembly 31 is movably connected with the upper bearing assembly 2 and the lower bearing assembly 4 respectively; the first transmission assembly 31 comprises a first water inlet end 311 and a water delivery end 312; the first water inlet end 311 is arranged through the upper bearing assembly 2, and the water delivery end 312 is sequentially arranged through the lower bearing assembly 4 and the lower cover assembly 5; the upper bearing assembly 2 is sealedly connected with the top cover assembly 1; the top cover assembly 1 comprises a second water inlet end 11 and a sealed water outlet end 12 which are interconnected; in the axial direction of the first transmission assembly 31, the sealed water outlet end 12 is relatively rotatably sealedly connected with the end of the first transmission assembly 31 through a sealing assembly 6; in the direction from the upper bearing assembly 2 to the lower bearing assembly 4, the second water inlet end 11, the sealed water outlet end 12, the first water inlet end 311 and the water delivery end 312 are sequentially connected. Specifically, the first transmission assembly 31 includes a first transmission shaft 313 and a first gear 314 which are coaxially arranged, wherein the first water inlet end 311 and the water delivery end 312 of the first transmission assembly 31 are respectively located at the two ends of the first transmission shaft 313. The water delivery end 312 is provided with a thread for connecting the spray rod 7 with the first transmission shaft 313 to realize that the high-pressure water changes from a static state to a rotating state. The spray rod 7 includes a rod body 71, a first nozzle 72 and a second nozzle 73, and the first nozzle 72 and the second nozzle 73 are respectively arranged at the two ends of the axial direction of the spray rod 7; in the axial direction of the spray rod 7, the axis of the first nozzle 72 forms an acute angle with the axis of the second nozzle 73. And the angle α formed between the axis of the first nozzle 72 and the ground is 60° to 75°, and similarly, the angle formed between the axis of the second nozzle 73 and the ground is also 60° to 75°.

[0071] In this embodiment, the top cover assembly 1 is provided with a first sealing groove 13 on one side facing the upper bearing assembly 2; the first water inlet end 311 is provided with a second sealing groove 315; the sealing assembly 6 includes an upper plugging assembly 61 and a lower plugging assembly 62; the upper plugging assembly 61 is embedded in the first sealing groove 13; the lower plugging assembly 62 is embedded in the second sealing groove 315; the upper plugging assembly 61 and the lower plugging assembly 62 can be relatively rotatable against each other. The first sealing groove 13 is located on the end surface of the first transmission shaft 313 connected to the top cover assembly 1.

[0072] In this embodiment, the upper plugging assembly 61 includes an upper sealing ring 611, an upper sealing ring 612 and an upper corrugated elastic member 613; the upper sealing ring 612 is embedded in the first sealing groove 13; in the radial direction of the first sealing groove 13, the upper sealing ring 611 is sandwiched between the outer wall of the upper sealing ring 612 and the inner wall of the first sealing groove 13; in the axial direction of the first sealing groove 13, the upper corrugated elastic member 613 is sandwiched between the upper sealing ring 612 and the inner wall of the first sealing groove 13. Specifically, the axial section of the upper sealing ring 612 is convex, and the circumferential side wall of the upper sealing ring 612 is provided with an outwardly convex limiting portion 614, and correspondingly, the first sealing groove 13 matches the upper sealing ring 612.

[0073] In this embodiment, the lower plugging assembly 62 includes a lower sealing ring 621, a lower sealing ring 622 and a lower corrugated elastic member 623; the lower sealing ring 622 is embedded in the second sealing groove 315; in the radial direction of the second sealing groove 315, the lower sealing ring 621 is sandwiched between the outer wall of the lower sealing ring 622 and the side wall of the second sealing groove 315; in the axial direction of the second sealing groove 315, the lower corrugated elastic member 623 is sandwiched between the lower sealing ring 622 and the top wall of the second sealing groove 315. Preferably, the upper plugging assembly 61 and the lower plugging assembly 62 have the same structure and are symmetrically distributed. Preferably, the upper corrugated elastic member 613 and the lower corrugated elastic member 623 are both corrugated springs.

[0074] In this embodiment, an upper protrusion 615 is provided on the side of the upper sealing component 61 facing the lower sealing component 62; a lower protrusion 624 is provided on the side of the lower sealing component 62 facing the upper sealing component 61; the upper protrusion 615 and the lower protrusion 624 can rotate relative to each other and press against each other; the diameter of the upper protrusion 615 and the diameter of the lower protrusion 624 are both smaller than the maximum diameter of the lower sealing ring 622.

[0075] In this embodiment, the top cover assembly 1 is provided with a drainage channel 14, which is distributed along the radial direction of the top cover assembly 1 and communicates with the first sealing groove 13 of the top cover assembly 1. Preferably, two drainage channels 14 are provided, and the two drainage channels 14 are symmetrically arranged along the radial direction of the top cover assembly 1.

[0076] In this embodiment, a limiting groove 15 is further provided on the side of the top cover assembly 1 facing the upper bearing assembly 2; the limiting groove 15 is coaxially arranged with the first sealing groove 13; the first transmission assembly 31 is rotatably embedded in the limiting groove 15; the water inlet end of the drainage channel 14 is respectively connected with the first sealing groove 13 and the limiting groove 15.

[0077] In this embodiment, the upper bearing assembly 2 includes an upper bearing seat 21, an upper bearing body 22, a first sealing ring 23 and a second sealing ring 24; a bearing receiving groove 211 and a third sealing groove 212 are provided on the side of the upper bearing seat 21 facing the top cover assembly 1, and the bearing receiving groove 211 and the third sealing groove 212 are coaxially arranged; the first sealing ring 23 is embedded in the side of the upper bearing seat 21 facing the lower bearing assembly 4; the upper bearing body 22 is embedded in the bearing receiving groove 211; the second sealing ring 24 is embedded in the third sealing groove 212 and is sandwiched between the upper bearing body 22 and the top cover assembly 1. Preferably, the upper bearing body 22 is a maintenance-free bearing.

[0078] In this embodiment, the driving assembly 3 further includes a housing 32 and a second transmission assembly 33; the upper bearing assembly 2 and the lower bearing assembly 4 are enclosed with the housing 32 to form a motor cavity 321; the axes of the first transmission assembly 31 and the second transmission assembly 33 are parallel to each other, and the first transmission assembly 31 and the second transmission assembly 33 are sequentially arranged along the length direction of the housing 32; the oil inlet joint 8 and the oil outlet joint 9 are respectively arranged on both sides of the width direction of the housing 32; the oil inlet joint 8 and the oil outlet joint 9 are respectively connected to the motor cavity 321; the second transmission assembly 33 has an oil drain channel, which is connected to the motor cavity 321; the second transmission assembly 33 is arranged in the motor cavity 321, and the first transmission assembly 31 is arranged through the motor cavity 321; the first transmission assembly 31 has a water passage 316 connecting the first water inlet end 311 and the water delivery end 312. Specifically, the second transmission assembly 33 includes a coaxially arranged second transmission shaft 331 and a second gear 332, and the first gear 314 is meshed with the second gear 332. The first transmission assembly 31 and the second transmission assembly 33 are disposed through the first sealing ring 23 at the same time.

[0079] In this embodiment, the driving assembly 3 further includes a floating side plate 34; in the height direction of the housing 32, a floating side plate 34 is respectively provided on both sides of the motor cavity 321; the lower bearing assembly 4 and the upper bearing assembly 2 are respectively pressed against the corresponding floating side plates 34; the floating side plate 34 is provided with an oil drain groove 341 on the side facing the motor cavity 321, and the motor cavity 321 is connected to the oil outlet joint 9 through the oil drain groove 341. Specifically, a groove 342 is provided on the side of the floating side plate 34 away from the motor cavity 321, and in the width direction of the floating side plate 34; a blocking member 343 is centrally arranged in the groove 342, and the blocking member 343 divides the groove 342 into two, and the end face of the blocking member 343 is flush with the surface of the side of the floating side plate 34 away from the motor cavity 321.

[0080] In this embodiment, a speed sensor 10 is also included; the speed sensor 10 is arranged on the housing 32 and is located on the same side as the oil outlet connector 9; the sensing end of the speed sensor 10 is arranged opposite to the second transmission assembly 33. Specifically, a speed measuring channel 322 for installing the speed sensor 10 is opened on the side wall of the housing 32, the speed measuring channel 322 is connected to the motor cavity 321, and the speed measuring channel 322 is arranged opposite to the second transmission assembly 33. The housing 32 has an oil inlet side and an oil return side, the speed sensor 10 and the oil outlet connector 9 are both arranged on the oil return side, and the oil inlet connector 8 is arranged on the oil inlet side.

[0081] In this embodiment, the lower bearing assembly 4 includes a lower bearing seat 41, a lower bearing body 42 and a third sealing ring 43; the lower bearing body 42 is embedded in the side of the lower bearing seat 41 away from the driving assembly 3, and the third sealing ring 43 is embedded in the side of the lower bearing seat 41 facing the driving assembly 3, and the third sealing ring 43 can be pressed against the housing 32 of the driving assembly 3. Preferably, the lower bearing body 42 is an angular contact ball bearing. Among them, the first transmission shaft 313 is provided with a retaining ring 35, and the retaining ring 35 is located on the side of the first gear 314 away from the upper bearing assembly 2, and the retaining ring 35 is pressed against the side of the lower bearing body 42 away from the upper bearing assembly 2. Among them, the first transmission assembly 31 and the second transmission assembly 33 are simultaneously passed through the third sealing ring 43. In the axial direction of the hydraulic motor, sixth sealing rings are respectively arranged on both sides of the housing 32; the sixth sealing ring located on the side of the housing 32 facing the upper bearing seat 21 is staggered with the first sealing ring 23, and the sixth sealing ring is pressed against the upper bearing seat 21; the sixth sealing ring located on the side of the housing 32 facing the lower bearing seat 41 is staggered with the third sealing ring 43, and the sixth sealing ring is pressed against the lower bearing seat 41.

[0082] In this embodiment, the lower cover assembly 5 includes a lower cover body 51, a fourth sealing ring 52 and a fifth sealing ring 53; the lower cover body 51 is connected to the lower bearing seat 41 by screws 20, and one end of the lower cover body 51 facing the drive assembly 3 is embedded in the lower bearing seat 41, and a fourth sealing groove 511 is opened on the side of the lower cover body 51 facing the drive assembly 3, the fourth sealing ring 52 is embedded in the fourth sealing groove 511, and the fourth sealing ring 52 is in sealing contact with the circumferential side wall of the first transmission assembly 31; the fifth sealing ring 53 is sleeved on the outside of the part of the lower cover body 51 facing the drive assembly 3 and clamped between the outer wall of the lower cover body 51 and the lower bearing seat 41.

[0083] In this embodiment, the top cover assembly 1 and the upper bearing seat 21, and the lower cover body 51 and the lower bearing seat 41 are connected by screws 20, and the upper bearing seat 21 and the shell 32, and the lower bearing seat 41 and the shell 32 are connected by pins 30.

[0084] The working principle of the present invention is:

[0085] The high-pressure water flows into the first transmission shaft 313 through the top cover assembly 1, and flows through the first transmission shaft 313 and is sprayed out from the first nozzle 72 and the second nozzle 73;

[0086] As the high-pressure hydraulic oil enters the motor chamber 321, the first transmission assembly 31 rotates, the spray rod 7 rotates, and then drives the first nozzle 72 and the second nozzle 73 to rotate, forming an annular spraying area to achieve ground cleaning.

[0087] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic motor, characterized in that: It includes a top cover assembly, an upper bearing assembly, a drive assembly, a lower bearing assembly and a lower cover assembly which are sequentially connected along the axial direction of the hydraulic motor; The driving assembly includes a first transmission assembly coaxially arranged with the top cover assembly; The first transmission assembly is movably connected to the upper bearing assembly and the lower bearing assembly respectively; The first transmission assembly has a first water inlet end and a water delivery end; The first water inlet end is arranged through the upper bearing assembly, and the water delivery end is arranged through the lower bearing assembly and the lower cover assembly in sequence; The upper bearing assembly is sealed and connected to the top cover assembly; The top cover assembly has a second water inlet end and a sealed water outlet end that are interconnected; In the axial direction of the first transmission assembly, the sealed water outlet end is sealed and connected to the end of the first transmission assembly via a sealing assembly so as to be relatively rotatable; In the direction from the upper bearing assembly to the lower bearing assembly, the second water inlet end, the sealed water outlet end, the first water inlet end and the water delivery end are connected in sequence.

2. A hydraulic motor according to claim 1, characterized in that: A first sealing groove is formed on one side of the top cover assembly facing the upper bearing assembly; The first water inlet end is provided with a second sealing groove; The sealing assembly comprises an upper plugging assembly and a lower plugging assembly; The upper plugging component is embedded in the first sealing groove; The lower plugging assembly is embedded in the second sealing groove; The upper blocking component and the lower blocking component can be relatively rotatable and pressed against each other.

3. A hydraulic motor according to claim 2, characterized in that: The lower plugging assembly includes a lower sealing ring, a lower sealing ring and a lower corrugated elastic member; The lower sealing ring is embedded in the second sealing groove; In the radial direction of the second sealing groove, the lower sealing ring is sandwiched between the outer wall of the lower sealing ring and the side wall of the second sealing groove; In the axial direction of the second sealing groove, the lower corrugated elastic member is sandwiched between the lower sealing ring and the top wall of the second sealing groove.

4. A hydraulic motor according to claim 3, characterized in that: An upper protrusion is provided on one side of the upper blocking component facing the lower blocking component; A lower protrusion is provided on one side of the lower blocking component facing the upper blocking component; The upper protrusion and the lower protrusion can rotate relative to each other and press against each other; The diameter of the upper protrusion and the diameter of the lower protrusion are both smaller than the maximum diameter of the lower sealing ring.

5. A hydraulic motor according to claim 1, characterized in that: The top cover assembly is provided with a water drainage channel; The drain channel is distributed along the radial direction of the top cover assembly and is communicated with the first sealing groove of the top cover assembly.

6. A hydraulic motor according to claim 5, characterized in that: A limiting groove is also provided on one side of the top cover assembly facing the upper bearing assembly; The limiting groove is coaxially arranged with the first sealing groove; The first transmission assembly is rotatably embedded in the limiting groove; The water inlet end of the water drain channel is communicated with the first sealing groove and the limiting groove respectively.

7. A hydraulic motor according to claim 1, characterized in that: The upper bearing assembly comprises an upper bearing seat, an upper bearing body, a first sealing ring and a second sealing ring; A bearing receiving groove and a third sealing groove are formed on a side of the upper bearing seat facing the top cover assembly, and the bearing receiving groove and the third sealing groove are coaxially arranged; The first sealing ring is embedded in a side of the upper bearing seat facing the lower bearing assembly; The upper bearing body is embedded in the bearing receiving groove; The second sealing ring is embedded in the third sealing groove and clamped between the upper bearing body and the top cover assembly.

8. A hydraulic motor according to claim 1, characterized in that: The drive assembly also includes a housing and a second transmission assembly; The upper bearing assembly and the lower bearing assembly are enclosed with the housing to form a motor cavity; The axes of the first transmission assembly and the second transmission assembly are parallel to each other, and the first transmission assembly and the second transmission assembly are arranged in sequence along the length direction of the housing; An oil inlet joint and an oil outlet joint are respectively provided on both sides of the shell in the width direction; The oil inlet joint and the oil outlet joint are respectively communicated with the motor cavity; The second transmission assembly has an oil drain passage therein, and the oil drain passage is in communication with the motor chamber; The second transmission assembly is disposed in the motor cavity, and the first transmission assembly is disposed through the motor cavity.

9. A hydraulic motor according to claim 8, characterized in that: The drive assembly also includes a floating side plate; In the height direction of the shell, a floating side plate is respectively provided on both sides of the motor cavity; The lower bearing assembly and the upper bearing assembly are respectively pressed against the corresponding floating side plates; An oil drain groove is formed on one side of the floating side plate facing the motor cavity, and the motor cavity is connected with the oil outlet joint through the oil drain groove.

10. A hydraulic motor according to claim 8, characterized in that: Also includes a speed sensor; The speed sensor is arranged on the housing and is located on the same side as the oil outlet connector; The sensing end of the rotation speed sensor is arranged opposite to the second transmission assembly.

Images