Hydraulic motor, cleaning device and cleaning vehicle

Abstract

The utility model discloses a hydraulic motor, a cleaning device and a cleaning vehicle. The hydraulic motor comprises a top cover assembly, an upper bearing assembly and a driving 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 penetrates through the upper bearing assembly, and the first transmission assembly is connected with the upper bearing assembly and the top cover assembly in a relatively rotating mode. The end face of the first transmission assembly is connected with the top cover assembly in a sealed mode through a sealing assembly. The axial length of the hydraulic motor can be reduced, so that the hydraulic motor is suitable for a small-tonnage cleaning vehicle.

Description

Technical Field

[0001] The utility model relates to the field of deep cleaning equipment, in particular to a hydraulic motor, a cleaning device and a cleaning vehicle. Background Art

[0002] Existing road deep cleaning equipment typically integrates a high-pressure cleaning device into a vehicle. While the vehicle is in motion, the high-pressure cleaning device performs high-pressure cleaning on the road surface it passes through. The high-pressure cleaning device includes a rotary joint. High-pressure water flows from a stationary pipe into the internal channel of the rotary joint, transferring the high-pressure water flow from the stationary component to the rotating component. Most current rotary joints are self-rotating structures, where the reaction force generated by the water jet causes the rotary joint to rotate. The rotational speed is related to the pressure and flow rate of the high-pressure water jet, making it difficult to precisely control the rotational speed.

[0003] At present, 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, since relative rotation occurs between the body cover and the drive shaft, in order to ensure the sealing between the drive shaft and the body cover, the drive shaft is set through the body cover. This structural design makes the axial size of the sprinkler head too large, making it unusable on small-tonnage cleaning vehicles. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a hydraulic motor, a cleaning device and a cleaning vehicle, so that the hydraulic motor can be suitable for a small-tonnage cleaning vehicle.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A hydraulic motor comprises a top cover assembly, an upper bearing assembly and a drive assembly which are sequentially connected along the axial direction of the hydraulic motor;

[0007] The drive assembly includes a first transmission assembly coaxially arranged with the top cover assembly;

[0008] The first transmission assembly is disposed through the upper bearing assembly, and the first transmission assembly is rotatably connected to the upper bearing assembly and the top cover assembly;

[0009] The first transmission assembly and the top cover assembly are sealed together via a sealing assembly.

[0010] Furthermore, a first sealing groove is formed on a side of the top cover assembly facing the upper bearing assembly;

[0011] The end surface of the first transmission assembly is provided with a second sealing groove;

[0012] The sealing assembly includes an upper sealing assembly and a lower sealing assembly;

[0013] The upper sealing component is embedded in the first sealing groove;

[0014] The lower plugging assembly is embedded in the second sealing groove;

[0015] The upper blocking component and the lower blocking component can be relatively rotatable and pressed against each other.

[0016] Furthermore, the upper sealing assembly includes an upper sealing ring, an upper sealing ring and an upper corrugated elastic member;

[0017] The upper sealing ring is embedded in the first sealing groove;

[0018] In the radial direction of the first sealing groove, the upper sealing ring is sandwiched between the outer wall of the upper sealing ring and the inner wall of the first sealing groove;

[0019] In the axial direction of the first sealing groove, the upper corrugated elastic member is sandwiched between the upper sealing ring and the inner wall of the first sealing groove.

[0020] Furthermore, the lower plugging assembly includes a lower sealing ring, a lower sealing ring and a lower corrugated elastic member;

[0021] The lower sealing ring is embedded in the second sealing groove;

[0022] 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;

[0023] 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.

[0024] Furthermore, the top cover assembly is provided with a water drainage channel;

[0025] 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.

[0026] Furthermore, a limiting groove is provided on a side of the top cover assembly facing the upper bearing assembly;

[0027] The limiting groove is coaxially arranged with the first sealing groove;

[0028] The first transmission assembly is rotatably embedded in the limiting groove;

[0029] The water inlet end of the drain channel is communicated with the first sealing groove and the limiting groove respectively.

[0030] Furthermore, it also includes a lower bearing assembly and a lower cover assembly;

[0031] The top cover assembly, the upper bearing assembly, the drive assembly, the lower bearing assembly and the lower cover assembly are sequentially connected along the axial direction of the hydraulic motor;

[0032] The first transmission assembly is sequentially arranged through the lower bearing assembly and the lower cover assembly, and the first transmission assembly, the lower bearing assembly and the lower cover assembly are arranged to be relatively rotatable.

[0033] Furthermore, the lower cover assembly includes a lower cover body, a fourth sealing ring and a fifth sealing ring;

[0034] The lower cover body is connected to the lower bearing seat by screws, and one end of the lower cover body facing the drive assembly is embedded in the lower bearing seat;

[0035] A fourth sealing groove is formed on a side of the lower cover body facing the driving assembly;

[0036] The fourth sealing ring is embedded in the fourth sealing groove, and the fourth sealing ring is in sealing contact with the circumferential side wall of the first transmission assembly;

[0037] The fifth sealing ring is sleeved on the outside of the portion of the lower cover body facing the driving assembly and is sandwiched between the outer wall of the lower cover body and the lower bearing seat.

[0038] In order to solve the above technical problems, the second technical solution adopted by the present invention is:

[0039] A cleaning device comprises a spray rod and the hydraulic motor as described in the above technical solution; the spray rod is in transmission connection with one end of the first transmission assembly away from the top cover assembly, and the spray rod is in communication with the first transmission assembly.

[0040] In order to solve the above technical problems, the third technical solution adopted by the present invention is:

[0041] A cleaning vehicle comprises the cleaning device as described in the above technical solution.

[0042] The beneficial effect of the present invention is that the present invention performs a sealing connection between the top cover assembly and the end face of the first transmission assembly through the sealing assembly, so as to realize a sealing connection between the top cover assembly and the end face of the first transmission assembly during relative rotation. Compared with the prior art, the axial length of the first transmission assembly is shortened, thereby reducing the axial size of the hydraulic motor, and thus can be applied to small-tonnage deep cleaning operation vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the partial structure of the hydraulic motor in the present utility model;

[0044] Figure 2 It is a cross-sectional view of the hydraulic motor in the present utility model;

[0045] Figure 3 It is a cross-sectional view of the cleaning device in the present utility model;

[0046] Figure 4 It is a side view of the spray boom in the utility model;

[0047] Figure 5 for Figure 2 Enlarged view of part A;

[0048] Figure 6 This is a schematic structural diagram of the upper sealing ring in the utility model;

[0049] Figure 7 This is a schematic structural diagram of the top cover assembly of the present invention;

[0050] Figure 8 for Figure 7 Sectional view of the AA plane;

[0051] Figure 9 for Figure 7 Cross-sectional view and partial enlarged view of the middle BB surface;

[0052] Figure 10 This is a structural diagram of the upper bearing assembly of the utility model;

[0053] Figure 11 It is a cross-sectional view of the upper bearing assembly of the present utility model;

[0054] Figure 12 This is a schematic structural diagram of the first sealing ring in the present utility model;

[0055] Figure 13 This is a schematic diagram of the partial structure of the drive assembly in the present utility model;

[0056] Figure 14 This is a schematic structural diagram of the first transmission assembly in the present utility model;

[0057] Figure 15 This is a structural diagram of the floating side plate in the present utility model;

[0058] Figure 16 This is a schematic structural diagram of the lower bearing assembly of the utility model;

[0059] Figure 17 for Figure 16 Cross-sectional view of the middle DD plane;

[0060] Figure 18 for Figure 16 Cross-sectional view of the middle CC plane;

[0061] Figure 19 It is a cross-sectional view of the lower cover assembly of the utility model;

[0062] Figure 20 This is a schematic structural diagram of the second transmission assembly in the present utility model;

[0063] Figure 21 It is a cross-sectional view of the second transmission assembly in the present utility model.

[0064] Description of labels:

[0065] 100. Hydraulic motor;

[0066] 110, top cover assembly; 111, second water inlet; 112, sealed water outlet; 113, first sealing groove; 114, drain channel; 115, limit groove;

[0067] 120, upper bearing assembly; 121, upper bearing seat; 1211, bearing receiving groove; 1212, third sealing groove; 122, upper bearing body; 123, first sealing ring; 124, second sealing ring;

[0068] 130. Drive assembly; 131. First transmission assembly; 1311. First water inlet; 1312. Water delivery end; 1313. First transmission shaft; 1314. First gear; 1315. Second sealing groove; 1316. Water passage; 132. Housing; 1321. Motor cavity; 133. Second transmission assembly; 1331. Second transmission shaft; 1332. Second gear; 134. Floating side plate; 1341. Oil drain groove; 135. Snap ring.

[0069] 140. Lower bearing assembly; 141. Lower bearing seat; 142. Lower bearing body; 143. Third sealing ring;

[0070] 150, lower cover assembly; 151, lower cover body; 1511, fourth sealing groove; 152, fourth sealing ring; 153, fifth sealing ring;

[0071] 160. Sealing assembly; 161. Upper blocking assembly; 1611. Upper sealing ring; 1612. Upper sealing ring; 1613. Upper corrugated elastic member; 1614. Positioning portion; 1615. Upper raised portion; 162. Lower blocking assembly; 1621. Lower sealing ring; 1622. Lower sealing ring; 1623. Lower corrugated elastic member; 1624. Lower raised portion;

[0072] 170, oil inlet connector; 180, oil outlet connector; 190, screw; 191, pin;

[0073] 200, spray rod; 210, rod body; 220, first nozzle; 230, second nozzle; DETAILED DESCRIPTION

[0074] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0075] Please refer to Figures 1-21 A cleaning vehicle includes a cleaning device; the cleaning device includes a spray rod 200 and a hydraulic motor 100; the spray rod 200 is in transmission connection with an end of a first transmission assembly 131 away from the top cover assembly 110, and the spray rod 200 is in communication with the first transmission assembly 131. The hydraulic motor 100 includes a top cover assembly 110, an upper bearing assembly 120, and a drive assembly 130 connected in sequence along the axial direction of the hydraulic motor 100; the drive assembly 130 includes a first transmission assembly 131 coaxially arranged with the top cover assembly 110; the first transmission assembly 131 is arranged through the upper bearing assembly 120, and the first transmission assembly 131 is rotatably connected to the upper bearing assembly 120 and the top cover assembly 110; the end face of the first transmission assembly 131 is sealed to the top cover assembly 110 via a sealing assembly 160. Specifically, the first transmission assembly 131 includes a coaxially arranged first transmission shaft 1313 and a first gear 1314. The first transmission shaft 1313 has a first water inlet end 1311 and a water delivery end 1312 at both ends. The first water inlet end 1311 is located at the end where the first transmission shaft 1313 is connected to the top cover assembly 110. The top cover assembly 110 has a second water inlet end 111 and a sealed water outlet end 112 that are interconnected. In the axial direction of the first transmission assembly 131, the sealed water outlet end 112 is rotatably sealedly connected to the end of the first transmission assembly 131 via a sealing assembly 160. In the direction from the upper bearing assembly 120 to the lower bearing assembly 140, the second water inlet end 111, the sealed water outlet end 112, the first water inlet end 1311, and the water delivery end 1312 are sequentially connected. The water delivery end 1312 is provided with threads for connecting the spray bar 200 to the first transmission shaft 1313, thereby achieving a rotational state of high-pressure water.

[0076] The spray bar 200 includes a bar body 210, a first nozzle 220, and a second nozzle 230. The first nozzle 220 and the second nozzle 230 are respectively disposed at both ends of the spray bar 200 in the axial direction. In the axial direction of the spray bar 200, the axis of the first nozzle 220 and the axis of the second nozzle 230 form an acute angle. Furthermore, the axis of the first nozzle 220 forms an angle α of 60° to 75° with the ground. Similarly, the axis of the second nozzle 230 also forms an angle of 60° to 75° with the ground.

[0077] It can be understood that the present invention uses the sealing component 160 to perform a sealing connection between the top cover component 110 and the end face of the first transmission component 131, so as to achieve a sealed connection between the end faces of the top cover component 110 and the first transmission component 131 during relative rotation. Compared with the existing technology, the axial length of the first transmission component 131 is reduced, and the axial size of the hydraulic motor 100 is reduced, so that it can be applied to small-tonnage deep cleaning operation vehicles.

[0078] In some embodiments, the hydraulic motor 100 further includes a lower bearing assembly 140 and a lower cover assembly 150; the top cover assembly 110, the upper bearing assembly 120, the drive assembly 130, the lower bearing assembly 140, and the lower cover assembly 150 are sequentially connected along the axial direction of the hydraulic motor 100; the first transmission assembly 131 is sequentially arranged through the lower bearing assembly 140 and the lower cover assembly 150, and the first transmission assembly 131 is arranged to rotate relative to the lower bearing assembly 140 and the lower cover assembly 150. The arrangement of the lower bearing assembly 140, the top cover assembly 110, the upper bearing assembly 120, and the lower cover assembly 150 can improve the axial and radial bearing capacity of the drive assembly 130, reduce wear on the internal gears of the drive assembly 130, and extend the service life of the hydraulic motor 100.

[0079] In some embodiments, a first sealing groove 113 is provided on the side of the top cover assembly 110 facing the upper bearing assembly 120; a second sealing groove 1315 is provided on the first water inlet end 1311; the sealing assembly 160 includes an upper sealing assembly 161 and a lower sealing assembly 162; the upper sealing assembly 161 is embedded in the first sealing groove 113; the lower sealing assembly 162 is embedded in the second sealing groove 1315; the upper sealing assembly 161 and the lower sealing assembly 162 can be relatively rotatably pressed against each other. The first sealing groove 113 is located on the end face where the first transmission shaft 1313 is connected to the top cover assembly 110. The sealing connection between the upper sealing assembly 161 and the lower sealing assembly 162 improves the sealing performance between the top cover assembly 110 and the first transmission shaft 1313.

[0080] In some embodiments, the upper sealing assembly 161 includes an upper sealing ring 1611, an upper sealing ring 1612, and an upper corrugated elastic member 1613. The upper sealing ring 1612 is embedded in the first sealing groove 113. In the radial direction of the first sealing groove 113, the upper sealing ring 1611 is sandwiched between the outer wall of the upper sealing ring 1612 and the inner wall of the first sealing groove 113. In the axial direction of the first sealing groove 113, the upper corrugated elastic member 1613 is sandwiched between the upper sealing ring 1612 and the inner wall of the first sealing groove 113. Specifically, the axial cross-section of the upper sealing ring 1612 is convex, and the circumferential sidewall of the upper sealing ring 1612 is provided with an outwardly protruding limiting portion 1614. Correspondingly, the first sealing groove 113 matches the upper sealing ring 1612. The limiting portion 1614, through a concave-convex matching structure, limits the rotational freedom of the sealing ring in the first sealing groove 113, thereby improving sealing reliability.

[0081] In some embodiments, lower sealing assembly 162 includes a lower sealing ring 1621, a lower sealing ring 1622, and a lower corrugated elastic member 1623. Lower sealing ring 1622 is embedded in second sealing groove 1315. In the radial direction of second sealing groove 1315, lower sealing ring 1621 is sandwiched between the outer wall of lower sealing ring 1622 and the sidewall of second sealing groove 1315. In the axial direction of second sealing groove 1315, lower corrugated elastic member 1623 is sandwiched between lower sealing ring 1622 and the top wall of second sealing groove 1315. Preferably, upper sealing assembly 161 and lower sealing assembly 162 have the same structure and are symmetrically distributed. Preferably, the upper corrugated elastic member 1613 and the lower corrugated elastic member 1623 are both corrugated springs. Since the lower sealing ring 1622 will produce wear on the upper sealing ring 1612 and / or the lower sealing ring 1622 after rotating relative to the upper sealing ring 1612 for a long time, the corrugated spring is provided to apply axial pressure to the upper sealing ring 1612 and the lower sealing ring 1622 respectively, and to automatically compensate for the gaps on the upper sealing ring 1612 and / or the lower sealing ring 1622 caused by wear, so that the upper sealing ring 1612 and the lower sealing ring 1622 always maintain a pressed state to ensure sealing.

[0082] In some embodiments, an upper protrusion 1615 is provided on the side of upper sealing assembly 161 facing lower sealing assembly 162; a lower protrusion 1624 is provided on the side of lower sealing assembly 162 facing upper sealing assembly 161. Upper protrusion 1615 and lower protrusion 1624 are relatively rotatable and mutually abutting. The diameters of upper protrusion 1615 and lower protrusion 1624 are both smaller than the maximum diameter of lower sealing ring 1622. The provision of upper protrusion 1615 and lower protrusion 1624 is designed to provide sufficient loss margin for upper sealing ring 1612 and lower sealing ring 1622 to ensure sealing.

[0083] In some embodiments, top cover assembly 110 defines a drain channel 114, which is radially distributed along top cover assembly 110 and communicates with first sealing groove 113 of top cover assembly 110. Drain channel 114 is provided to relieve high-pressure water after seal assembly 160 experiences wear and tear from prolonged relative motion. Drain channel 114 also serves to remind operators to promptly replace seal assembly 160, ensuring optimal water flow from spray boom 200.

[0084] In some embodiments, a limiting groove 115 is further provided on the side of the top cover assembly 110 facing the upper bearing assembly 120; the limiting groove 115 is coaxially arranged with the first sealing groove 113; the first transmission assembly 131 is rotatably embedded in the limiting groove 115; the water inlet end of the drainage channel 114 is respectively connected to the first sealing groove 113 and the limiting groove 115.

[0085] In some embodiments, the upper bearing assembly 120 includes an upper bearing seat 121, an upper bearing body 122, a first sealing ring 123, and a second sealing ring 124. A bearing receiving groove 1211 and a third sealing groove 1212 are defined on the side of the upper bearing seat 121 facing the top cover assembly 110. The bearing receiving groove 1211 and the third sealing groove 1212 are coaxially arranged. The first sealing ring 123 is embedded in the side of the upper bearing seat 121 facing the lower bearing assembly 140. The upper bearing body 122 is embedded in the bearing receiving groove 1211. The second sealing ring 124 is embedded in the third sealing groove 1212 and is sandwiched between the upper bearing body 122 and the top cover assembly 110. Preferably, the upper bearing body 122 is a maintenance-free bearing.

[0086] In some embodiments, the drive assembly 130 further includes a housing 132, a second transmission assembly 133, and a floating side plate 134. The upper bearing assembly 120 and the lower bearing assembly 140, together with the housing 132, form a motor cavity 1321. The axes of the first transmission assembly 131 and the second transmission assembly 133 are parallel to each other, and the first transmission assembly 131 and the second transmission assembly 133 are arranged in sequence along the length of the housing 132. An oil inlet connector 170 and an oil outlet connector 180 are respectively provided on either side of the width of the housing 132. The oil inlet connector 170 and the oil outlet connector 180 are respectively connected to the motor cavity 1321. The second transmission assembly 133 has an oil drain channel therein, which is connected to the motor cavity 1321. The second transmission assembly 133 is disposed within the motor cavity 1321, and the first transmission assembly 131 is disposed through the motor cavity 1321. The first transmission assembly 131 has a water passage 1316 therein that connects the first water inlet end 1311 with the water delivery end 1312. Specifically, the second transmission assembly 133 includes a coaxially arranged second transmission shaft 1331 and a second gear 1332, with the first gear 1314 meshing with the second gear 1332. The first and second transmission assemblies 131, 133 are both positioned through the first sealing ring 123. A floating side plate 134 is positioned on either side of the motor cavity 1321 in the height direction of the housing 132. The lower bearing assembly 140 and the upper bearing assembly 120 respectively press against the corresponding floating side plate 134. An oil drain groove 1341 is defined on the side of the floating side plate 134 facing the motor cavity 1321, connecting the motor cavity 1321 to the oil outlet connector 180 through the oil drain groove 1341.

[0087] In some embodiments, the lower bearing assembly 140 includes a lower bearing seat 141, a lower bearing body 142, and a third sealing ring 143. The lower bearing body 142 is embedded in the side of the lower bearing seat 141 facing away from the drive assembly 130, and the third sealing ring 143 is embedded in the side of the lower bearing seat 141 facing the drive assembly 130, and the third sealing ring 143 is capable of abutting against the drive assembly 130. Preferably, the lower bearing body 142 is an angular contact ball bearing to improve the bearing capacity of the lower bearing body 142 in the radial and axial directions of the first transmission shaft 1313. The third sealing ring 143 is provided to improve the seal between the drive assembly 130 and the lower bearing seat 141, preventing hydraulic oil leakage. Among them, the first transmission shaft 1313 is outerly provided with a retaining ring 135, which is located on the side of the first gear 1314 away from the upper bearing assembly 120. The retaining ring 135 is pressed against the side of the lower bearing body 142 away from the upper bearing assembly 120 to limit the axial freedom of the retaining bearing body and improve the structural stability.

[0088] In some embodiments, the lower cover assembly 150 includes a lower cover body 151, a fourth sealing ring 152 and a fifth sealing ring 153; the lower cover body 151 is connected to the lower bearing seat 141 by screws 190, and the end of the lower cover body 151 facing the drive assembly 130 is embedded in the lower bearing seat 141, and a fourth sealing groove 1511 is opened on the side of the lower cover body 151 facing the drive assembly 130, and the fourth sealing ring 152 is embedded in the fourth sealing groove 1511, and the fourth sealing ring 152 is in sealing contact with the circumferential side wall of the first transmission assembly 131 to achieve the first transmission shaft 1313 to maintain a seal with the lower cover during rotation; and the fifth sealing ring 153 is sleeved on the outside of the part of the lower cover body 151 facing the drive assembly 130 and clamped between the outer wall of the lower cover body 151 and the lower bearing seat 141. The setting of the fifth sealing ring 153 is used to prevent the hydraulic oil in the motor cavity 1321 from leaking, thereby ensuring the overall sealing of the hydraulic motor 100.

[0089] The first embodiment of the present invention is:

[0090] A cleaning vehicle includes a cleaning device; the cleaning device includes a spray rod 200 and a hydraulic motor 100; the spray rod 200 is drivingly connected to an end of a first transmission assembly 131 away from a top cover assembly 110, and the spray rod 200 is in communication with the first transmission assembly 131. The hydraulic motor 100 includes a top cover assembly 110, an upper bearing assembly 120, and a drive assembly 130, which are sequentially connected along the axial direction of the hydraulic motor 100; the drive assembly 130 includes a first transmission assembly 131 coaxially arranged with the top cover assembly 110; the first transmission assembly 131 is disposed through the upper bearing assembly 120 and is rotatably connected to the upper bearing assembly 120 and the top cover assembly 110; the end face of the first transmission assembly 131 is sealed to the top cover assembly 110 via a sealing assembly 160. Specifically, the first transmission assembly 131 includes a coaxially arranged first transmission shaft 1313 and a first gear 1314. The first transmission shaft 1313 has a first water inlet end 1311 and a water delivery end 1312 at both ends, while the top cover assembly 110 has a second water inlet end 111 and a sealed water outlet end 112 that are interconnected. In the axial direction of the first transmission assembly 131, the sealed water outlet end 112 is rotatably sealedly connected to the end of the first transmission assembly 131 via a sealing assembly 160. In the direction from the upper bearing assembly 120 to the lower bearing assembly 140, the second water inlet end 111, the sealed water outlet end 112, the first water inlet end 1311, and the water delivery end 1312 are sequentially connected. The water delivery end 1312 is provided with threads for connecting the spray bar 200 to the first transmission shaft 1313, thereby converting the high-pressure water from a static state to a rotating state.

[0091] Among them, the spray rod 200 includes a rod body 210, a first nozzle 220 and a second nozzle 230. The first nozzle 220 and the second nozzle 230 are respectively arranged at the two ends of the axial direction of the spray rod 200; in the axial direction of the spray rod 200, the axis of the first nozzle 220 and the axis of the second nozzle 230 form an acute angle, and the angle of the acute angle is 65°.

[0092] In this embodiment, it also includes a lower bearing assembly 140 and a lower cover assembly 150; the top cover assembly 110, the upper bearing assembly 120, the drive assembly 130, the lower bearing assembly 140 and the lower cover assembly 150 are connected in sequence along the axial direction of the hydraulic motor 100; the first transmission assembly 131 is arranged to pass through the lower bearing assembly 140 and the lower cover assembly 150 in sequence, and the first transmission assembly 131 and the lower bearing assembly 140 and the lower cover assembly 150 are arranged to be relatively rotatable.

[0093] In this embodiment, a first sealing groove 113 is defined on the side of the top cover assembly 110 facing the upper bearing assembly 120; a second sealing groove 1315 is defined on the first water inlet end 1311; and the sealing assembly 160 includes an upper sealing assembly 161 and a lower sealing assembly 162. The upper sealing assembly 161 is embedded in the first sealing groove 113, and the lower sealing assembly 162 is embedded in the second sealing groove 1315. The upper and lower sealing assemblies 161 and 162 are rotatably pressed against each other. The first sealing groove 113 is located on the end surface of the first transmission shaft 1313 where it connects to the top cover assembly 110.

[0094] In this embodiment, the upper sealing assembly 161 includes an upper sealing ring 1611, an upper sealing ring 1612, and an upper corrugated elastic member 1613. The upper sealing ring 1612 is embedded in the first sealing groove 113. In the radial direction of the first sealing groove 113, the upper sealing ring 1611 is sandwiched between the outer wall of the upper sealing ring 1612 and the inner wall of the first sealing groove 113. In the axial direction of the first sealing groove 113, the upper corrugated elastic member 1613 is sandwiched between the upper sealing ring 1612 and the inner wall of the first sealing groove 113. Specifically, the axial cross-section of the upper sealing ring 1612 is convex, and the circumferential sidewall of the upper sealing ring 1612 is provided with an outwardly protruding stopper 1614. Accordingly, the first sealing groove 113 and the upper sealing ring 1612 match.

[0095] In this embodiment, the lower sealing assembly 162 includes a lower sealing ring 1621, a lower sealing ring 1622, and a lower corrugated elastic member 1623. The lower sealing ring 1622 is embedded in the second sealing groove 1315. In the radial direction of the second sealing groove 1315, the lower sealing ring 1621 is sandwiched between the outer wall of the lower sealing ring 1622 and the sidewall of the second sealing groove 1315. In the axial direction of the second sealing groove 1315, the lower corrugated elastic member 1623 is sandwiched between the lower sealing ring 1622 and the top wall of the second sealing groove 1315. Preferably, the upper sealing assembly 161 and the lower sealing assembly 162 have the same structure and are symmetrically distributed. Preferably, both the upper corrugated elastic member 1613 and the lower corrugated elastic member 1623 are wave springs.

[0096] In this embodiment, an upper protrusion 1615 is provided on the side of the upper sealing component 161 facing the lower sealing component 162; a lower protrusion 1624 is provided on the side of the lower sealing component 162 facing the upper sealing component 161; the upper protrusion 1615 and the lower protrusion 1624 can rotate relative to each other and press against each other; the diameter of the upper protrusion 1615 and the diameter of the lower protrusion 1624 are both smaller than the maximum diameter of the lower sealing ring 1622.

[0097] In this embodiment, the top cover assembly 110 is provided with a drainage channel 114; the drainage channel 114 is distributed along the radial direction of the top cover assembly 110 and communicates with the first sealing groove 113 of the top cover assembly 110. Preferably, two drainage channels 114 are provided, and the two drainage channels 114 are symmetrically distributed along the radial direction of the top cover assembly 110.

[0098] In this embodiment, a limiting groove 115 is further provided on the side of the top cover assembly 110 facing the upper bearing assembly 120; the limiting groove 115 is coaxially arranged with the first sealing groove 113; the first transmission assembly 131 is rotatably embedded in the limiting groove 115; the water inlet end of the drainage channel 114 is respectively connected to the first sealing groove 113 and the limiting groove 115.

[0099] In this embodiment, the upper bearing assembly 120 includes an upper bearing seat 121, an upper bearing body 122, a first sealing ring 123, and a second sealing ring 124. A bearing receiving groove 1211 and a third sealing groove 1212 are defined on the side of the upper bearing seat 121 facing the top cover assembly 110. The bearing receiving groove 1211 and the third sealing groove 1212 are coaxially arranged. The first sealing ring 123 is embedded in the side of the upper bearing seat 121 facing the lower bearing assembly 140. The upper bearing body 122 is embedded in the bearing receiving groove 1211. The second sealing ring 124 is embedded in the third sealing groove 1212 and is sandwiched between the upper bearing body 122 and the top cover assembly 110. Preferably, the upper bearing body 122 is a maintenance-free bearing.

[0100] In this embodiment, the drive assembly 130 further includes a housing 132, a second transmission assembly 133, and a floating side plate 134. The upper bearing assembly 120 and the lower bearing assembly 140, together with the housing 132, form a motor cavity 1321. The axes of the first and second transmission assemblies 131, 133 are parallel to each other, and the first and second transmission assemblies 131, 133 are arranged sequentially along the length of the housing 132. An oil inlet connector 170 and an oil outlet connector 180 are respectively provided on opposite sides of the housing 132 in the width direction. The oil inlet connector 170 and the oil outlet connector 180 are respectively connected to the motor cavity 1321. The second transmission assembly 133 has an oil drain channel therein, which communicates with the motor cavity 1321. The second transmission assembly 133 is disposed within the motor cavity 1321, and the first transmission assembly 131 is disposed through the motor cavity 1321. The first transmission assembly 131 has a water passage 1316 therein, connecting the first water inlet end 1311 with the water delivery end 1312. Specifically, the second transmission assembly 133 includes a coaxially arranged second transmission shaft 1331 and a second gear 1332, with the first gear 1314 meshing with the second gear 1332. The first and second transmission assemblies 131, 133 are both positioned through the first sealing ring 123. A floating side plate 134 is positioned on either side of the motor cavity 1321 in the height direction of the housing 132. The lower bearing assembly 140 and the upper bearing assembly 120 respectively press against the corresponding floating side plate 134. An oil drain groove 1341 is defined on the side of the floating side plate 134 facing the motor cavity 1321, connecting the motor cavity 1321 to the oil outlet connector 180 through the oil drain groove 1341.

[0101] In this embodiment, the lower bearing assembly 140 includes a lower bearing seat 141, a lower bearing body 142, and a third sealing ring 143. The lower bearing body 142 is embedded in the side of the lower bearing seat 141 away from the drive assembly 130, and the third sealing ring 143 is embedded in the side of the lower bearing seat 141 facing the drive assembly 130. The third sealing ring 143 can press against the drive assembly 130. Preferably, the lower bearing body 142 is an angular contact ball bearing.

[0102] In this embodiment, the lower cover assembly 150 includes a lower cover body 151, a fourth sealing ring 152 and a fifth sealing ring 153; the lower cover body 151 is connected to the lower bearing seat 141 by screws 190, and the end of the lower cover body 151 facing the drive assembly 130 is embedded in the lower bearing seat 141, and a fourth sealing groove 1511 is opened on the side of the lower cover body 151 facing the drive assembly 130, the fourth sealing ring 152 is embedded in the fourth sealing groove 1511, and the fourth sealing ring 152 is in sealing contact with the circumferential side wall of the first transmission assembly 131; and the fifth sealing ring 153 is sleeved on the outside of the part of the lower cover body 151 facing the drive assembly 130 and clamped between the outer wall of the lower cover body 151 and the lower bearing seat 141.

[0103] In this embodiment, the top cover assembly 110 and the upper bearing seat 121, and the lower cover body 151 and the lower bearing seat 141 are connected by screws 190, while the upper bearing seat 121 and the shell 132, and the lower bearing seat 141 and the shell 132 are connected by pins 191.

[0104] The working principle of this utility model is:

[0105] The second water inlet end 111 of the top cover assembly 110 is connected to an external water source. Water flows through the second water inlet end 111, the sealed water outlet end 112, the first water inlet end 1311 and the water delivery end 1312 in sequence, then enters the spray bar 200 and is sprayed out from the first nozzle 220 and the second nozzle 230 of the spray bar 200.

[0106] When the spray bar 200 sprays water, the first transmission assembly 131 drives the spray bar 200 to rotate, and the first transmission assembly 131 also rotates relative to the top cover assembly 110 .

[0107] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, 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 and a drive assembly which are sequentially connected along the axial direction of the hydraulic motor; The drive assembly includes a first transmission assembly coaxially arranged with the top cover assembly; The first transmission assembly is disposed through the upper bearing assembly, and the first transmission assembly is rotatably connected to the upper bearing assembly and the top cover assembly; The end surface of the first transmission assembly is sealed to the top cover assembly via a sealing assembly.

2. A hydraulic motor according to claim 1, characterized in that: A first sealing groove is formed on a side of the top cover assembly facing the upper bearing assembly; The end surface of the first transmission assembly is provided with a second sealing groove; The sealing assembly includes an upper sealing assembly and a lower sealing assembly; The upper sealing 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 upper sealing assembly includes an upper sealing ring, an upper sealing ring and an upper corrugated elastic member; The upper sealing ring is embedded in the first sealing groove; In the radial direction of the first sealing groove, the upper sealing ring is sandwiched between the outer wall of the upper sealing ring and the inner wall of the first sealing groove; In the axial direction of the first sealing groove, the upper corrugated elastic member is sandwiched between the upper sealing ring and the inner wall of the first sealing groove.

4. A hydraulic motor according to claim 2 or 3, 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.

5. The hydraulic motor according to claim 1, characterized in that: The top cover assembly is provided with a 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 further provided on a 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 drain channel is communicated with the first sealing groove and the limiting groove respectively.

7. The hydraulic motor according to claim 1, characterized in that: Also included are a lower bearing assembly and a lower cover assembly; The top cover assembly, the upper bearing assembly, the drive assembly, the lower bearing assembly and the lower cover assembly are sequentially connected along the axial direction of the hydraulic motor; The first transmission assembly is sequentially arranged through the lower bearing assembly and the lower cover assembly, and the first transmission assembly, the lower bearing assembly and the lower cover assembly are arranged to be relatively rotatable.

8. A hydraulic motor according to claim 7, characterized in that: The lower cover assembly includes a lower cover body, a fourth sealing ring and a fifth sealing ring; The lower cover body is connected to the lower bearing assembly by screws, and one end of the lower cover body facing the driving assembly is embedded in the lower bearing assembly; A fourth sealing groove is formed on a side of the lower cover body facing the driving assembly; The fourth sealing ring is embedded in the fourth sealing groove, and the fourth sealing ring is in sealing contact with the circumferential side wall of the first transmission assembly; The fifth sealing ring is sleeved on the outside of the portion of the lower cover body facing the driving assembly and is sandwiched between the outer wall of the lower cover body and the lower bearing assembly.

9. A cleaning device, characterized in that: comprising a spray boom and a hydraulic motor as claimed in any one of claims 1 to 8; The spray rod is in transmission connection with one end of the first transmission assembly away from the top cover assembly, and the spray rod is in communication with the first transmission assembly.

10. A cleaning vehicle, characterized in that: Comprising the cleaning device as claimed in claim 9.

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