A mortar-proof hydraulic motor speed reducer

Abstract

The present invention discloses a mortar-proof hydraulic motor reduction device, comprising a motor housing, a reduction gear ring, a sealing cover, a floating pressure ring, a first oil tank, a second oil tank, a sealing gasket and a third oil tank, wherein the outer wall of one end of the motor housing is rotatably sleeved with a reduction gear ring, a floating pressure ring is embedded and installed between the motor housing and the reduction gear ring, a first oil tank is provided inside the floating pressure ring, a sealing gasket is connected to the outer wall of the first oil tank, a sealing cover is sleeved on the surface of the connection between the motor housing and the reduction gear ring, a second oil tank and a third oil tank are provided on the surface of the motor housing opposite to the reduction gear ring, and a first concave hole and a second concave hole are provided on the surface of the motor housing and the reduction gear ring, respectively. The present invention can adjust the sealing performance by manually adjusting the pressure, and when working deep into the concrete, the pressure of the concrete will act between the sealing structures, performing tighter sealing measures, and effectively preventing mud and sand from entering the interior of the reduction mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, in particular to a mortar-proof hydraulic motor speed reducer. Background Art

[0002] The hydraulic motor reduction gear used in the curing machine is immersed in concrete mortar for extended periods of time, up to 3 meters deep, and must withstand the intrusion and pressure of the mortar. Currently, the only sealing device used is a floating oil seal, the outer surface of which is in direct contact with the outside world. This sealing structure can only provide a short-term seal.

[0003] After extensive searching, the existing technology was found: Publication No. CN203223518U discloses a hydraulic motor reducer, which solves the technical problems of the existing two-stage ordinary cylindrical gear reducer, such as small transmission ratio range, large size, bulky, low efficiency, low reliability, short life, high operating noise, and small transmission torque. The hydraulic motor reducer has a hydraulic motor main shaft and a sun gear fixedly connected, which meshes with the planetary gears, thereby achieving a first-stage reduction; the front end of the bearing assembly is fixedly connected to the planetary gears, and the bearing assembly is installed in conjunction with the first cycloid wheel and the second cycloid wheel, which alternately mesh with the needle pin, and the needle pin is embedded in the inner wall of the reducer housing, thereby forming a second-stage reduction; the utility model adopts a first-stage straight-tooth planetary transmission mechanism and a second-stage cycloid wheel differential gear transmission mechanism to increase the transmission ratio and improve the transmission torque. At the same time, the reducer has a compact structure, high efficiency, stable rotation, low noise, reliable operation, and a long service life.

[0004] In summary, under the action of external pressure, small foreign particles such as mortar and dust can easily enter the floating oil seal at the connection between the existing reduction mechanism and the hydraulic motor, causing wear on the floating metal ring and the inner lip of the sealing ring of the floating oil seal, destroying the sealing performance of the floating oil seal and causing oil leakage. In addition, the mud and sand that enter the reducer make the reducer noisy and vibrate violently, greatly reducing the service life of the reducer. Summary of the Invention

[0005] The purpose of the present invention is to provide a mortar-proof hydraulic motor speed reducer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a mortar-proof hydraulic motor reduction device, comprising a motor housing, a reduction gear ring, a cover, a floating pressure ring, a first oil tank, a second oil tank, a sealing gasket and a third oil tank, a reduction gear ring is rotatably sleeved on the outer wall of one end of the motor housing, a floating pressure ring is embedded and installed between the motor housing and the reduction gear ring, a first oil tank is provided inside the floating pressure ring, symmetrically distributed oil sealing rings are provided on the inner wall of the floating pressure ring, a sealing gasket is connected to the outer wall of the first oil tank, a cover is sleeved on the surface of the connection between the motor housing and the reduction gear ring, a second oil tank and a third oil tank are respectively provided on the surface of the motor housing and the reduction gear ring on opposite sides, and a first concave hole and a second concave hole distributed in a circular array are respectively provided on the surface of the motor housing and the reduction gear ring.

[0007] Preferably, symmetrically distributed angular contact bearings are provided between the inner wall of the reduction gear ring and the outer wall of the motor housing.

[0008] Preferably, a transmission rod is rotatably plugged into the inner wall of one end of the motor housing, a reduction gear set is installed inside the reduction gear ring, and an end cover is installed inside the end of the reduction gear ring away from the motor housing.

[0009] Preferably, a spacer ring is provided on the inner wall of the floating pressure ring, and the spacer ring is located between the oil seal rings, and the inner wall of the spacer ring is in sliding contact with the outer wall of the motor housing.

[0010] Preferably, a first gasket is embedded and installed between the outer wall of the oil seal ring and the inner wall of the floating pressure ring.

[0011] Preferably, second rubber pads are provided on the inner walls on both sides of the first oil tank, and the surfaces of the second rubber pads are in sliding contact with the motor housing and the outer wall of the reduction gear ring respectively.

[0012] Preferably, the sealing gasket is provided with plug holes distributed in a circular array, and plugs are slidably inserted into the plug holes.

[0013] The surface of the cover is provided with screw holes distributed in a circular array, and knobs are rotatably inserted in the screw holes, and the lower ends of the knobs are connected to the plugs.

[0014] Preferably, symmetrically distributed second washers are provided between the inner wall of the cover and the outer walls of the motor housing and the reduction gear ring.

[0015] Preferably, first rubber pads are embedded and installed at the openings on opposite sides of the second oil bin and the third oil bin, and the outer wall of the first rubber pad is in sliding contact with the outer wall of the sealing pad.

[0016] Preferably, the inner walls of the first concave hole and the second concave hole are both provided with eardrums, and connecting holes are respectively opened between the first concave hole, the second concave hole, and the second oil tank and the third oil tank.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: during actual use of the present invention, after the floating pressure ring and the sealing cover are assembled, the staff can screw in the knob so that the knob drives the plug to move, reducing the storage space in the first oil tank, and the grease in the first oil tank squeezes the second rubber pad so that the surface of the second rubber pad is raised, and the gap between the motor housing and the reduction gear ring is smaller, thereby achieving a better sealing effect and preventing mud and sand from entering between the motor housing and the reduction gear ring, affecting the normal operation of the equipment; and when used in concrete mortar, the pressure of the mortar acts on the surface of the tympanic membrane, forcing the tympanic membrane to deform, squeezing the grease in the first concave hole and the second concave hole into the second oil tank and the third oil tank, respectively squeezing the first rubber pad convex, so that the gap between the motor housing, the reduction gear ring and the sealing pad is smaller, and has stronger sealing performance, so that the hydraulic motor can also have good sealing performance deep in the mortar, further ensuring the normal use of the hydraulic motor and the reduction mechanism, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the connection between the motor housing and the reduction gear ring of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the second oil tank and the third oil tank of the present invention;

[0021] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the sealing cover and the floating pressure ring of the present invention.

[0022] In the figure: 1. Motor housing; 2. Reduction gear ring; 3. Transmission rod; 4. End cover; 5. Reduction gear set; 6. Sealing cover; 7. Floating pressure ring; 8. Oil seal ring; 9. First oil tank; 10. First gasket; 11. Angular contact bearing; 12. Second oil tank; 13. First recessed hole; 14. Knob; 15. Sealing gasket; 16. Second recessed hole; 17. Third oil tank; 18. Connecting hole; 19. Tympanic membrane; 20. First rubber pad; 21. Spacer ring; 22. Second rubber pad; 23. Plug; 24. Screw hole; 25. Second gasket; 26. Plug hole. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1 to 4 , the present invention provides two embodiments:

[0025] Example 1:

[0026] A mortar-proof hydraulic motor reduction device includes a motor housing 1, a reduction gear ring 2, a sealing cover 6, a floating pressure ring 7, a first oil tank 9, a second oil tank 12, a sealing gasket 15 and a third oil tank 17. The reduction gear ring 2 is rotatably sleeved on the outer wall of one end of the motor housing 1, and symmetrically distributed angular contact bearings 11 are arranged between the inner wall of the reduction gear ring 2 and the outer wall of the motor housing 1. A transmission rod 3 is rotatably inserted into the inner wall of one end of the motor housing 1, a reduction gear set 5 is installed inside the reduction gear ring 2, and an end cover 4 is installed inside the end of the reduction gear ring 2 facing away from the motor housing 1. A floating pressure ring 7 is embedded and installed between the motor housing 1 and the reduction gear ring 2, and a first oil tank 9 is opened inside the floating pressure ring 7. Second rubber pads 22 are provided on the inner walls on both sides of the first oil tank 9, and the surfaces of the second rubber pads 22 are in sliding contact with the motor housing 1 and the outer walls of the reduction gear ring 2 respectively. The inner wall of the floating pressure ring 7 is provided with symmetrically distributed oil seal rings 8, and the inner wall of the floating pressure ring 7 is provided with spacer rings 21, and the spacer rings 21 are located between the oil seal rings 8. The inner wall of the spacer ring 21 is in sliding contact with the outer wall of the motor housing 1, and a first gasket 10 is embedded and installed between the outer wall of the oil seal ring 8 and the inner wall of the floating pressure ring 7.

[0027] A sealing gasket 15 is connected to the outer wall of the first oil tank 9. Inside this gasket 15, plug holes 26 are arranged in a circular array. Each plug hole 26 is slidably inserted into each plug hole 26. A surface of the cover 6 is provided with screw holes 24 arranged in a circular array. Each screw hole 24 is rotatably inserted into each knob 14, the lower end of each knob 14 being connected to the plug 23. The cover 6 is sleeved onto the surface where the motor housing 1 and the reduction gear ring 2 meet. Second gaskets 25 are symmetrically positioned between the inner wall of the cover 6 and the outer walls of the motor housing 1 and reduction gear ring 2. After the floating pressure ring 7 and the cover 6 are assembled, the operator can screw in the knob 14, which drives the plug 23 to move, reducing the storage space in the first oil tank 9. The grease in the first oil tank 9 squeezes the second rubber gasket 22, causing it to bulge. This narrows the gap between the second rubber gasket 22 and the motor housing 1 and reduction gear ring 2, providing a better seal and preventing mud and sand from entering between the motor housing 1 and the reduction gear ring 2 and affecting normal operation of the equipment.

[0028] Example 2:

[0029] The motor housing 1 and the reduction gear ring 2 have a second oil tank 12 and a third oil tank 17 on their opposite sides, and the motor housing 1 and the reduction gear ring 2 have a first concave hole 13 and a second concave hole 16 on their surfaces distributed in a circular array. The second oil tank 12 and the third oil tank 17 are both embedded with a first rubber pad 20 at their openings on opposite sides, and the outer wall of the first rubber pad 20 is slidably fitted with the outer wall of the sealing pad 15. The inner walls of the first concave hole 13 and the second concave hole 16 are both provided with a tympanic membrane 19. There is a gap between the first concave hole 13 and the second concave hole 16 and the second oil tank 12 and the third oil tank 17. A connecting hole 18 is respectively opened. When used in concrete mortar, the pressure of the mortar acts on the surface of the eardrum 19, forcing the eardrum 19 to deform, squeezing the grease in the first concave hole 13 and the second concave hole 16 into the second oil tank 12 and the third oil tank 17, respectively squeezing the first rubber pad 20 to bulge, so that the gap between the motor housing 1, the reduction gear ring 2 and the sealing gasket 15 is smaller, with stronger sealing performance, so that the hydraulic motor can also have good sealing performance deep in the mortar, further ensuring the normal use of the hydraulic motor and the reduction mechanism, and extending the service life of the equipment.

[0030] During actual use, after the staff completes the assembly of the floating pressure ring 7 and the sealing cover 6, the staff can screw in the knob 14 so that the knob 14 drives the plug 23 to move, reducing the storage space in the first oil tank 9. The grease in the first oil tank 9 squeezes the second rubber pad 22, making the surface of the second rubber pad 22 convex, and the gap between the motor housing 1 and the reduction gear ring 2 smaller, thereby achieving a better sealing effect and preventing mud and sand from entering between the motor housing 1 and the reduction gear ring 2 and affecting the normal operation of the equipment; and when used in concrete mortar, the pressure of the mortar acts on the surface of the eardrum 19, pressing the eardrum 19 to deform, squeezing the grease in the first concave hole 13 and the second concave hole 16 into the second oil tank 12 and the third oil tank 17, respectively squeezing the first rubber pad 20 convex, making the gap between the motor housing 1, the reduction gear ring 2 and the sealing pad 15 smaller, and having stronger sealing performance, so that the hydraulic motor can also have good sealing performance deep in the mortar, further ensuring the normal use of the hydraulic motor and the reduction mechanism, and extending the service life of the equipment.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A mortar-proof hydraulic motor reduction device, comprising a motor housing (1), a reduction gear ring (2), a cover (6), a floating pressure ring (7), a first oil tank (9), a second oil tank (12), a sealing gasket (15) and a third oil tank (17), characterized in that: The outer wall of one end of the motor housing (1) is rotatably sleeved with a reduction gear ring (2), a floating pressure ring (7) is embedded and installed between the motor housing (1) and the reduction gear ring (2), a first oil bin (9) is provided inside the floating pressure ring (7), and a symmetrically distributed oil seal ring (8) is provided on the inner wall of the floating pressure ring (7), a sealing gasket (15) is connected to the outer wall of the first oil bin (9), a cover (6) is sleeved on the surface of the connection between the motor housing (1) and the reduction gear ring (2), a second oil bin (12) and a third oil bin (17) are respectively provided on the surface of the motor housing (1) and the reduction gear ring (2), and a first concave hole (13) and a second concave hole (16) distributed in a circular array are respectively provided on the surface of the motor housing (1) and the reduction gear ring (2); The inner wall of the floating pressure ring (7) is provided with a spacer ring (21), and the spacer ring (21) is located between the oil seal rings (8), and the inner wall of the spacer ring (21) is in sliding contact with the outer wall of the motor housing (1); A first gasket (10) is embedded and installed between the outer wall of the oil seal ring (8) and the inner wall of the floating pressure ring (7); Second rubber pads (22) are provided on both inner walls of the first oil tank (9), and the surfaces of the second rubber pads (22) are in sliding contact with the outer walls of the motor housing (1) and the reduction gear ring (2), respectively; The sealing gasket (15) is provided with plug holes (26) distributed in a circular array, and plugs (23) are slidably inserted into the plug holes (26); The surface of the cover (6) is provided with screw holes (24) distributed in a circular array, and knobs (14) are rotatably inserted into the screw holes (24), and the lower ends of the knobs (14) are connected to the plugs (23); A symmetrically distributed second gasket (25) is provided between the inner wall of the cover (6) and the outer walls of the motor housing (1) and the reduction gear ring (2); A first rubber pad (20) is embedded and installed at the openings on opposite sides of the second oil bin (12) and the third oil bin (17), and the outer wall of the first rubber pad (20) is slidably fitted with the outer wall of the sealing pad (15); The inner walls of the first concave hole (13) and the second concave hole (16) are both provided with eardrums (19), a connecting hole (18) is provided between the first concave hole (13) and the second oil tank (12), and another connecting hole (18) is provided between the second concave hole (16) and the third oil tank (17).

2. The anti-mortar hydraulic motor speed reducer according to claim 1, characterized in that: Symmetrically distributed angular contact bearings (11) are provided between the inner wall of the reduction gear ring (2) and the outer wall of the motor housing (1).

3. The anti-mortar hydraulic motor speed reducer according to claim 1, characterized in that: A transmission rod (3) is rotatably plugged into the inner wall of one end of the motor housing (1), a reduction gear set (5) is installed inside the reduction gear ring (2), and an end cover (4) is installed inside the end of the reduction gear ring (2) facing away from the motor housing (1).

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