A reducer and sealing mechanism thereof

Abstract

The present invention relates to the technical field of reducers, and in particular to a reducer and a sealing mechanism thereof. The reducer comprises a rotating shaft and a body, and the rotating shaft and the body are sealed by the reducer sealing mechanism; the reducer sealing mechanism comprises a seal, an intermediate ring, an adjustment component, and two coil springs, all of which are inserted into the body, and the seal is used to seal the rotating shaft and the body when the car is stopped; the intermediate ring is sleeved on the rotating shaft and can slide along the axial direction of the rotating shaft; the coil spring is sleeved on the rotating shaft, and the two coil springs are respectively arranged on both sides of the intermediate ring, and the two ends of the coil spring are respectively arranged on the intermediate ring and the rotating shaft, and the spiral directions of the two coil springs are opposite, and both are used for spirally sealing the rotating shaft and the body; the adjustment component is configured to be able to adjust the moving direction of the intermediate ring according to the direction of the rotating shaft, and then when the rotating shaft rotates, the intermediate ring moves to the side of the coil spring opposite to the direction of the rotating shaft, so that it can automatically adapt to different directions of the rotating shaft and improve applicability.

Description

Technical Field

[0001] The invention relates to the technical field of reducers, and in particular to a reducer and a sealing mechanism thereof. Background Art

[0002] The reducer is a precision device widely used in mechanical transmission systems. Its main function is to increase the output torque by reducing the input speed, thereby realizing power transmission and speed change. It plays a vital role in modern industry.

[0003] In the actual operation of the reducer, effective sealing of the rotating shaft is a crucial link, which is mainly to prevent lubricating oil leakage and avoid equipment failure, reduced efficiency and environmental pollution caused by oil leakage. At present, common sealing mechanisms mainly include spiral seals, oil seals and parking seals.

[0004] In the related technology, for example, Chinese patent CN222185706U discloses a spiral sealing structure, which includes a reducer housing, a roller pulley oil chamber is arranged in the reducer housing, an input shaft is mounted on the reducer housing, and the reducer housing and the input shaft are sealed by an oil seal structure; the reducer housing and the input shaft are also mechanically sealed by a sealing ring, a spiral wire structure is arranged on the inner circular wall of the sealing ring, and the winding direction of the spiral wire structure is opposite to the rotation direction of the input shaft. When the input shaft rotates, the lubricating oil in the lubricating oil chamber generates resistance through the spiral wire of the sealing ring and cannot continue to flow to the oil seal, thereby ensuring the reliability of the seal.

[0005] However, there are also some problems with the above-mentioned spiral sealing structure during actual use: when the working scenario of the reducer changes, resulting in the need to change the rotation direction of the rotating shaft, it is necessary to replace the sealing ring with a spiral structure opposite to the new rotation direction. In this process, not only does it involve the disassembly of multiple parts, which will consume a lot of time and manpower, but also during the disassembly process, the slightest carelessness may cause damage to other parts; in addition, after replacing the sealing ring, the entire reducer needs to be reassembled and debugged to ensure its normal operation. This series of operations not only increases the maintenance cost and downtime of the equipment, but also places high demands on the technical level of the operator. Summary of the invention

[0006] Based on this, it is necessary to provide a reducer and its sealing mechanism to address the problems of cumbersome operation and poor adaptability of the sealing mechanism of the current reducer during use.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A sealing mechanism, a reducer sealing mechanism is applied to a reducer, the reducer comprises a rotating shaft and a body; the reducer sealing mechanism comprises a sealing member, an intermediate ring, an adjusting assembly and two spiral springs all inserted in the body, the sealing member is used to seal the rotating shaft and the body when the vehicle is parked; the intermediate ring is sleeved on the rotating shaft and can slide along the axial direction of the rotating shaft; the spiral spring is sleeved on the rotating shaft, the two spiral springs are respectively arranged at two ends of the intermediate ring, one end of the spiral spring is arranged on the intermediate ring, and the other end is arranged on the rotating shaft, the spiral directions of the two spiral springs are opposite, and both are used to spirally seal the rotating shaft and the body; the adjusting assembly is configured to be able to adjust the moving direction of the intermediate ring according to the direction of rotation of the rotating shaft, and then when the rotating shaft rotates, the intermediate ring moves to the side of the spiral spring opposite to the direction of rotation of the rotating shaft.

[0009] Furthermore, the adjustment component includes an adjustment ring, two annular cones, multiple balls and multiple sliding plates. The adjustment ring is fixedly inserted in the body and coaxially sleeved on the outer periphery of the rotating shaft and spaced apart from the intermediate ring. The two annular cones are symmetrically arranged on the inner peripheral wall of the adjustment ring, and the flared openings of the annular cones are arranged facing away from the middle of the adjustment ring. The balls are inserted on the outer peripheral wall of the intermediate ring and can slide elastically in the radial direction of the intermediate ring and can roll freely, and the balls can form a guiding fit with the annular cones. The sliding plates are obliquely inserted on the outer peripheral wall of the intermediate ring and can slide elastically in the radial direction of the intermediate ring. Multiple balls and multiple sliding plates are alternately arranged circumferentially.

[0010] Furthermore, the reducer sealing mechanism also includes an elastic ring, which is coaxially inserted on the inner peripheral wall of the adjustment ring and can form an abutment fit with the sliding sheet.

[0011] Furthermore, the sealing member is a sealing ring, which is sleeved on the rotating shaft and can slide elastically along the axial direction of the rotating shaft.

[0012] Furthermore, the reducer sealing mechanism also includes a moving component inserted in the body, and the moving component is configured to drive the sealing ring to move when the spiral spring spirally seals the rotating shaft and the body, so that the sealing ring and the body are out of engagement.

[0013] Furthermore, the moving component includes a slide groove, a mounting shaft, a roller and a centrifugal portion. The slide groove is arranged on the circumferential side wall of the rotating shaft and extends along the axial direction of the rotating shaft; the mounting shaft is arranged on the sealing ring, the axis of the mounting shaft and the axis of the rotating shaft are arranged perpendicularly, and the mounting shaft can rotate around its own axis; the roller is fixedly sleeved on the mounting shaft and at the same time inserted into the slide groove and forms a friction fit with the slide groove so that it can slide along the slide groove; the centrifugal portion is arranged on the mounting shaft and can drive the mounting shaft to rotate under the action of centrifugal force when the rotating shaft rotates.

[0014] Furthermore, there are multiple moving components, which are arranged along the circumferential direction.

[0015] Furthermore, the cross-section of the spring is square.

[0016] Furthermore, the sealing element is an oil seal, and the oil seal is sleeved on the rotating shaft.

[0017] The present invention also provides a reducer, which comprises a rotating shaft and a body, and the rotating shaft and the body are sealed by a reducer sealing mechanism.

[0018] The beneficial effects of the present invention are:

[0019] The present invention relates to a reducer and a sealing mechanism thereof. The reducer comprises a rotating shaft and a body. The rotating shaft and the body are sealed by a reducer sealing mechanism. During the rotation of the rotating shaft, the intermediate ring moves to the side of the spiral spring opposite to the rotation direction of the rotating shaft under the action of an adjusting component, and at the same time, the spiral spring with the same rotation direction as the rotating shaft is stretched. When the intermediate ring moves to the limit position, the spiral spring with the same rotation direction as the rotating shaft is stretched to the limit, and then the rotating shaft drives the spiral spring with the same rotation direction as the rotating shaft to rotate, so that the spiral spring with the same rotation direction as the rotating shaft can spirally seal the rotating shaft and the body. By setting the adjusting component, the reducer sealing mechanism can automatically adapt to the different rotation directions of the rotating shaft without disassembling and debugging the reducer, thereby facilitating the improvement of the ease of use and applicability of the reducer sealing mechanism.

[0020] Furthermore, by setting up a moving component, when in use, the spiral spring can drive the sealing ring to move when the spiral seal shaft and the body are in use, so that the sealing ring and the body are disengaged, thereby reducing the wear of the sealing ring and reducing the impact on the parking sealing performance of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of the reducer and the reducer sealing mechanism provided by an embodiment of the present invention when assembled;

[0022] Figure 2 A schematic diagram of the three-dimensional structure of the rotating shaft, the reducer sealing mechanism, the bearing, the protective cover, the end cover and the sealing ring provided in an embodiment of the present invention when assembled;

[0023] Figure 3 for Figure 2 The cross-sectional structural diagram shown;

[0024] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0025] Figure 5 for Figure 4 A schematic diagram of the partially enlarged structure at B in the middle;

[0026] Figure 6 for Figure 4 A schematic diagram of the partially enlarged structure at C in the middle;

[0027] Figure 7 A schematic diagram of the three-dimensional structure of the rotating shaft, the reducer sealing mechanism, the bearing, the end cover and the sealing ring when they are assembled according to an embodiment of the present invention;

[0028] Figure 8 for Figure 7 The schematic diagram of the local enlarged structure at D in the middle;

[0029] Fig. 9 A schematic diagram of the front view of the structure of the intermediate ring, two spiral springs and the moving component of the reducer sealing mechanism provided by the embodiment of the present invention when assembled;

[0030] Fig.10 for Fig. 9 Middle EE section view;

[0031] Fig.11 for Fig.10 Schematic diagram of the partially enlarged structure at point F in the middle.

[0032] in:

[0033] 1. Rotating shaft; 2. Main body; 201. End cover; 202. Protective cover; 203. Bearing; 3. Sealing ring; 301. Support block; 4. Intermediate ring; 501. Adjusting ring; 502. Conical surface of ring; 503. Ball; 504. Sliding piece; 505. Support; 506. First compression spring; 507. Second compression spring; 6. Coil spring; 7. Elastic ring; 8. Moving assembly; 801. Slide groove; 802. Mounting shaft; 803. Roller; 804. Centrifugal part; 9. Third compression spring. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] like Figure 1 As shown, the reducer provided by one embodiment of the present invention is configured to include a rotating shaft 1 and a body 2, and the rotating shaft 1 and the body 2 are sealed by a reducer sealing mechanism; the rotating shaft 1 is rotatably connected to the body 2; to facilitate the installation of the rotating shaft 1, the body 2 is configured to also include an end cover 201, a protective cover 202 and a bearing 203, wherein the end cover 201 is coaxially sleeved on the outer periphery of the rotating shaft 1 and fixed to the outside of the body 2 by bolts, the protective cover 202 is rotatably sleeved on the rotating shaft 1 and fixed to the end cover 201 by bolts, the bearing 203 is inserted into the body 2, and the outer ring of the bearing 203 is fixed on the body 2, and the inner ring of the bearing 203 is fixed on the rotating shaft 1, ensuring that the rotating shaft 1 can be rotatably connected to the body 2.

[0038] like Figures 2 to 11 As shown, the reducer sealing mechanism provided by an embodiment of the present invention is configured to include a seal, an intermediate ring 4, an adjustment component, and two coil springs 6, all of which are inserted into the body 2. The seal is used to seal the rotating shaft 1 and the body 2 when the car is parked; the intermediate ring 4 is sleeved on the rotating shaft 1 and can slide along the axial direction of the rotating shaft 1; the coil spring 6 is sleeved on the rotating shaft 1, and the two coil springs 6 are respectively arranged at both ends of the intermediate ring 4, one end of the coil spring 6 is arranged on the intermediate ring 4, and the other end is arranged on the rotating shaft 1, the spiral directions of the two coil springs 6 are opposite, and both are used for spirally sealing the rotating shaft 1 and the body 2; the adjustment component is configured to be able to adjust the moving direction of the intermediate ring 4 according to the direction of rotation of the rotating shaft 1, and then when the rotating shaft 1 rotates, the intermediate ring 4 moves to the side of the coil spring 6 opposite to the direction of rotation of the rotating shaft 1.

[0039] Specifically in this embodiment, the sealing element is sealed between the end of the end cover 201 away from the bearing 203 and the rotating shaft 1, ensuring that the rotating shaft 1 and the body 2 can be parked and sealed when the rotating shaft 1 is stationary; the intermediate ring 4 is inserted between the rotating shaft 1 and the end cover 201, ensuring that the position of the spiral seal is closer to the bearing 203 than the parking seal, ensuring that the spiral seal can intercept the lubricating oil that may seep out from the bearing 203 in the first time during the operation of the reducer, and use the sealing principle of the spiral structure to effectively prevent the lubricating oil from further flowing in the direction of the parking seal, reduce the working pressure of the parking seal, and extend the service life of the parking seal; one of the coil springs 6 is spiraled in a clockwise direction, and the other coil spring 6 is spiraled in a counterclockwise direction, ensuring that the spiral directions of the two coil springs 6 are opposite.

[0040] Optionally, in order to avoid affecting the spiral sealing effect of the spiral spring 6 due to the relative rotation between the intermediate ring 4 and the rotating shaft 1, a guide protrusion is provided on the rotating shaft 1, and the guide protrusion is a strip structure and extends along the axial direction of the rotating shaft 1. A guide groove is opened on the inner circumferential wall of the intermediate ring 4, and the guide groove is sleeved on the guide protrusion and can slide along the guide protrusion, ensuring that the intermediate ring 4 can only slide along the axial direction of the rotating shaft 1.

[0041] During use, when the rotating shaft 1 rotates clockwise, the intermediate ring 4 moves to one side of the counterclockwise spiral spring 6 under the action of the adjusting component, and at the same time stretches the clockwise spiral spring 6; when the intermediate ring 4 moves to the extreme position, the clockwise spiral spring 6 is stretched to the limit; then the rotating shaft 1 drives the clockwise spiral spring 6 to rotate, and when the clockwise spiral spring 6 rotates, its spiral surface will generate an axial thrust on the lubricating oil, and this thrust will cause the lubricating oil to flow along the spiral surface toward the inside of the reducer, thereby preventing the lubricating oil from leaking to the outside and realizing spiral sealing.

[0042] Similarly, when the shaft 1 rotates counterclockwise, the intermediate ring 4 moves to one side of the clockwise spiral spring 6 under the action of the adjustment component, and at the same time, the counterclockwise spiral spring 6 is stretched; when the intermediate ring 4 moves to the limit position, the counterclockwise spiral spring 6 is stretched to the limit; then the shaft 1 drives the counterclockwise spiral spring 6 to rotate, and when the counterclockwise spiral spring 6 rotates, its spiral surface will generate an axial thrust on the lubricating oil, which will cause the lubricating oil to flow along the spiral surface to the inside of the reducer, thereby preventing the lubricating oil from leaking to the outside and achieving spiral sealing. In this way, the reducer sealing mechanism can automatically adapt to the different directions of the shaft 1, without the need to disassemble and debug the reducer, which is conducive to improving the ease of use and applicability of the reducer sealing mechanism.

[0043] When the rotating shaft 1 gradually stops rotating, the middle ring 4 gradually returns to its original position under the elastic action of the two spiral springs 6 .

[0044] Furthermore, the adjustment component is configured to include an adjustment ring 501, two annular cones 502, multiple balls 503 and multiple slides 504. The adjustment ring 501 is fixedly inserted in the body 2, and is coaxially sleeved on the outer periphery of the rotating shaft 1, and is spaced apart from the intermediate ring 4; the two annular cones 502 are symmetrically arranged on the inner circumferential wall of the adjustment ring 501, and the flared openings of the annular cones 502 are arranged away from the middle of the adjustment ring 501; the balls 503 are inserted on the outer circumferential wall of the intermediate ring 4, and can elastically slide in the radial direction of the intermediate ring 4, and can roll freely, and the balls 503 can form a guiding fit with the annular cones 502; the slides 504 are obliquely inserted on the outer circumferential wall of the intermediate ring 4, and can elastically slide in the radial direction of the intermediate ring 4; the multiple balls 503 and the multiple slides 504 are alternately arranged along the circumferential direction.

[0045] Specifically in this embodiment, Figure 5 As shown, the adjusting ring 501 is fixedly arranged on the inner peripheral wall of the end cover 201 to ensure that the adjusting ring 501 has a certain position; in order to facilitate the free rolling of the balls 503, the adjusting assembly is configured to also include a number of supports 505 equal to the number of the balls 503, such as Fig.10 and Fig.11 As shown, the support 505 is inserted in the middle ring 4, and the ball 503 is rolled and inserted on the outer end of the support 505; in order to facilitate the elastic sliding of the ball 503 in the radial direction of the middle ring 4, the adjustment component is configured to also include a first compression spring 506 whose number is equal to the number of the ball 503. The first compression spring 506 is inserted in the middle ring 4 and extends in the radial direction of the middle ring 4. One end of the first compression spring 506 is connected to the middle ring 4, and the other end is connected to the support 505. Under the action of the first compression spring 506 The support 505 has a tendency to retract into the interior of the intermediate ring 4; in order to facilitate the elastic sliding of the slide 504 along the radial direction of the intermediate ring 4, the adjustment component is configured to also include a second compression spring 507 whose number is equal to the number of balls 503. The second compression spring 507 is inserted into the intermediate ring 4 and extends along the radial direction of the intermediate ring 4. One end of the second compression spring is connected to the intermediate ring 4 and the other end is connected to the slide 504. Under the action of the second compression spring 507, the slide 504 has a tendency to retract into the interior of the intermediate ring 4.

[0046] Optionally, the plurality of balls 503 and the plurality of slides 504 may be arranged evenly along the circumferential direction.

[0047] During use, when the shaft 1 rotates, the shaft 1 synchronously drives the middle ring 4 to rotate, and the middle ring 4 synchronously drives the support 505, the ball 503 and the slide 504 to rotate; during the rotation of the support 505, the ball 503 and the slide 504, the support 505, the ball 503 and the slide 504 are all subjected to centrifugal force, and under the action of centrifugal force, they all move in the axial direction away from the middle ring 4, and at the same time compress the first compression spring 506 and the second compression spring 507, and the sliding distance of the slide 504 is smaller than the sliding distance of the support 505, so that the slide 504 moves to the extreme position first.

[0048] When the slide 504 reaches the limit position, the slide 504 is in a state of extending out of the middle ring 4. Since the slide 504 is inclined, the lubricating oil will flow to one side of the middle ring 4 under the one-sided guiding effect of the slide 504. Taking the left side as an example, the lubricating oil simultaneously generates a thrust to the right on the slide 504. Under the action of the thrust, the slide 504 drives the middle ring 4 to move to the right. As the middle ring 4 moves, the support 505 drives the ball 503 to continue to move away from the axis of the middle ring 4 under the action of centrifugal force, so that the ball 503 is close to the The ring cone surface 502 is close to the right side; when the ball 503 abuts against the ring cone surface 502 on the right side, the ball 503 moves toward the end of the adjusting ring 501 under the guiding action of the inclined surface of the ring cone surface 502 on the right side, and drives the intermediate ring 4 to move to the right side through the support 505, so that the spiral spring 6 on the right side is compressed and the spiral spring 6 on the left side is stretched; when the intermediate ring 4 moves to the extreme position, the spiral spring 6 on the left side is stretched to the limit; then the rotating shaft 1 drives the spiral spring 6 on the left side to rotate, so that the spiral spring 6 on the left side can spirally seal the rotating shaft 1 and the body 2.

[0049] Similarly, when the direction of the rotating shaft 1 changes, the lubricating oil will flow to the right side under the one-sided guiding action of the sliding plate 504, and the lubricating oil will generate a thrust to the left side on the sliding plate 504 at the same time. Under the action of this thrust, the sliding plate 504 drives the intermediate ring 4 to move to the left side. As the intermediate ring 4 moves, the support 505 drives the ball 503 to continue to move in the axial direction away from the intermediate ring 4 under the action of centrifugal force, so that the ball 503 approaches the annular cone surface 502 on the left side; when the ball 503 abuts against the annular cone surface 502 on the left side, the ball 503 moves toward the end of the adjusting ring 501 under the inclined guiding action of the annular cone surface 502, and drives the intermediate ring 4 to move to the left side through the support 505, so that the spiral spring 6 on the left side is compressed and the spiral spring 6 on the right side is stretched; when the intermediate ring 4 moves to the limit position, the spiral spring 6 on the right side is stretched to the limit; then the rotating shaft 1 drives the spiral spring 6 on the right side to rotate, so that the spiral spring 6 on the right side can spirally seal the rotating shaft 1 and the body 2.

[0050] When the rotating shaft 1 gradually stops rotating, the support 505 drives the ball 503 to gradually return to its original position under the action of the first compression spring 506 , and the slide 504 gradually returns to its original position under the action of the second compression spring 507 .

[0051] In a further embodiment, the reducer sealing mechanism further includes an elastic ring 7 , which is coaxially inserted on the inner circumferential wall of the adjustment ring 501 and can form an abutment fit with the sliding sheet 504 .

[0052] Specifically in this embodiment, Figure 5 As shown, the elastic ring 7 is arranged in the middle of the adjustment ring 501 , and the two ring cone surfaces 502 are symmetrically arranged about the elastic ring 7 .

[0053] During use, when the slide 504 reaches the limit position, the slide 504 is synchronously pushed on the inner wall of the elastic ring 7. Under the push of the slide 504, since the slide 504 is inclined, a groove-like structure similar to an internal thread can be formed on the inner wall of the elastic ring 7. At this time, the slide 504 and the groove-like structure form a spiral fit. As the shaft 1 rotates, the slide 504 drives the middle ring 4 to move to one side. Taking the right side as an example, the spiral spring 6 on the right is compressed and the spiral spring 6 on the left is stretched; when the middle ring 4 moves to the limit position, the spiral spring 6 on the left is stretched to the limit; then the shaft 1 drives the spiral spring 6 on the left to rotate, so that the spiral spring 6 on the left can spirally seal the shaft 1 and the body 2.

[0054] Similarly, when the direction of rotation of the rotating shaft 1 changes, the rotation direction of the groove-shaped structure will change. As the rotating shaft 1 rotates, the slide 504 drives the middle ring 4 to move to the left, compressing the spiral spring 6 on the left and stretching the spiral spring 6 on the right; when the middle ring 4 moves to the extreme position, the spiral spring 6 on the right is stretched to the limit; then the rotating shaft 1 drives the spiral spring 6 on the right to rotate, so that the spiral spring 6 on the right can spirally seal the rotating shaft 1 and the body 2.

[0055] In some other embodiments, the sealing member is configured as a sealing ring 3 , which is sleeved on the rotating shaft 1 and can slide elastically along the axial direction of the rotating shaft 1 .

[0056] Specifically in this embodiment, Figure 4 As shown, the sealing ring 3 is sealingly arranged between the end portion of the end cover 201 away from the bearing 203 and the rotating shaft 1, and the outer peripheral wall of the sealing ring 3 and the inner peripheral wall of the end portion of the end cover 201 away from the bearing 203 are both arranged as conical surfaces, and are abutted when in use, thereby ensuring sealing.

[0057] In order to facilitate the elastic sliding of the sealing ring 3 along the axial direction of the rotating shaft 1, the reducer sealing mechanism is configured to further include a third compression spring 9, such as Figure 4As shown, the third compression spring 9 is sleeved on the outer circumference of the rotating shaft 1 and is inserted into the protective cover 202 at the same time. One end of the third compression spring 9 is arranged on the protective cover 202, and the other end is arranged on the sealing ring 3. Under the action of the third compression spring 9, the sealing ring 3 has a tendency to press against the end cover 201, thereby ensuring the sealing between the sealing ring 3 and the end cover 201.

[0058] In a further embodiment, in order to reduce the wear of the sealing ring 3, the reducer sealing mechanism is configured to further include a moving assembly 8 inserted in the body 2, and the moving assembly 8 is configured to drive the sealing ring 3 to move when the spiral spring 6 spirally seals the rotating shaft 1 and the body 2, so that the sealing ring 3 and the body 2 are disengaged. In this way, the parking seal can be disabled when the spiral seal is in effect, thereby reducing the wear of the sealing ring 3 and reducing the impact on the parking sealing performance of the sealing ring 3.

[0059] Furthermore, the moving component 8 is configured to include a slide groove 801, a mounting shaft 802, a roller 803 and a centrifugal portion 804, the slide groove 801 is arranged on the circumferential side wall of the rotating shaft 1, and extends along the axial direction of the rotating shaft 1; the mounting shaft 802 is arranged on the sealing ring 3, the axis of the mounting shaft 802 is arranged perpendicular to the axis of the rotating shaft 1, and the mounting shaft 802 can rotate around its own axis; the roller 803 is fixedly sleeved on the mounting shaft 802, and at the same time is inserted into the slide groove 801, and forms a friction fit with the slide groove 801, so as to be able to slide along the slide groove 801; the centrifugal portion 804 is arranged on the mounting shaft 802, and can drive the mounting shaft 802 to rotate under the action of centrifugal force when the rotating shaft 1 rotates.

[0060] Specifically in this embodiment, in order to facilitate the installation of the mobile component 8, as shown in FIG. Figure 8 As shown, a support block 301 is arranged on the end face of the sealing ring 3 away from the end cover 201, and the support block 301 is arranged as an L-shaped structure. A notch is opened on the inner side wall of the suspended end of the support block 301, and the installation shaft 802 passes through the suspended end of the support block 301 during installation. The roller 803 is inserted in the notch, and the centrifugal part 804 is arranged as a mallet-shaped structure, and the small end passes through the end of the installation shaft 802, and the large end is suspended.

[0061] Optionally, in order to improve the stability of the installation shaft 802 during rotation, two centrifugal parts 804 may be provided on each installation shaft 802 , and the two centrifugal parts 804 on the same installation shaft 802 are respectively located at two ends of the installation shaft 802 .

[0062] Initially, the centrifugal portion 804 extends entirely in a direction parallel to the axis of the rotating shaft 1 .

[0063] During use, when the rotating shaft 1 rotates, the rotating shaft 1 synchronously drives the sealing ring 3 to rotate, and the sealing ring 3 synchronously drives the moving component 8 to rotate; during the rotation of the moving component 8, the mounting shaft 802, the roller 803 and the centrifugal part 804 are all subjected to centrifugal force, and under the action of the centrifugal force, the centrifugal part 804 synchronously rotates around the axis of the mounting shaft 802, and when the centrifugal part 804 rotates, it synchronously drives the roller 803 to rotate through the mounting shaft 802, and when the roller 803 rotates, it synchronously drives the sealing ring 3 to move away from the end cover 201 through the support block 301 through the friction contact between the roller 803 and the slide groove 801, and at the same time compresses the third compression spring 9 to disengage the sealing ring 3 and the end cover 201 to reduce the wear of the sealing ring 3.

[0064] When the rotating shaft 1 gradually stops rotating, the sealing ring 3 moves toward the direction close to the end cover 201 under the action of the third compression spring 9; during the movement of the sealing ring 3, the sealing ring 3 drives the roller 803 to move through the support block 301, and the roller 803 rotates due to the friction contact between the roller 803 and the slide groove 801. When the roller 803 rotates, it drives the centrifugal part 804 to rotate through the mounting shaft 802, so that the centrifugal part 804 is reset.

[0065] In a further embodiment, in order to improve the force uniformity of the sealing ring 3, a plurality of moving components 8 are provided and arranged along the circumferential direction.

[0066] Specifically in this embodiment, Figure 8 As shown, the number of movable components 8 can be set to four, and they are evenly arranged along the circumference. In this way, when the rotating shaft 1 rotates, the four evenly distributed movable components 8 will be simultaneously affected by the centrifugal force. At this time, driven by the centrifugal force, the centrifugal parts 804 in each movable component 8 rotate synchronously around the installation shaft 802, thereby driving the roller 803 to slide in the slide groove 801, pushing the sealing ring 3 to move, and multiple movable components 8 work together in the circumference, so that the driving force from all directions received by the sealing ring 3 during the movement is uniform, which effectively avoids the situation where the sealing ring 3 is locally subjected to concentrated force due to the action of a single or multiple unevenly distributed movable components 8, and prevents the sealing ring 3 from tilting, deformation and other problems, thereby ensuring that when the sealing ring 3 is disengaged from the end cover 201, the entire sealing surface is subjected to uniform force, maintaining good sealing performance.

[0067] In other embodiments, the cross-sectional shape of the coil spring 6 is set to be square, so that the spiral side wall surface of the coil spring 6 is a complete and continuous curved surface, and this complete and continuous curved surface structure can form a more uniform and stable sealing barrier when realizing spiral sealing.

[0068] Specifically, during the operation of the reducer, when the lubricating oil is subjected to the spiral action of the coil spring 6, the continuous curved surface can effectively guide the flow direction of the lubricating oil, avoiding the risk of lubricating oil leakage due to the presence of unevenness or discontinuity on the side wall, greatly improving the sealing performance of the coil spring 6. At the same time, due to the integrity of the curved surface, the pressure distribution of the lubricating oil generated by the coil spring 6 during the rotation process is more uniform, further enhancing the reliability of the sealing effect.

[0069] In addition, this structural feature can also reduce the problem of sealing failure caused by local stress concentration, extend the service life of the coil spring 6, provide a solid sealing guarantee for the long-term stable operation of the reducer, and effectively reduce equipment maintenance costs and downtime.

[0070] In other embodiments, the sealing member may also be configured as an oil seal, which is sleeved on the rotating shaft 1. In this way, the oil seal can be used to achieve parking sealing of the rotating shaft 1 and the body 2.

[0071] Specifically in this embodiment, the oil seal can be provided to directly replace the sealing ring 3 , or can be provided between the protective cover 202 and the rotating shaft 1 .

[0072] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A reducer sealing mechanism, characterized in that: The reducer sealing mechanism is applied to a reducer, the reducer comprising a rotating shaft (1) and a body (2); the reducer sealing mechanism comprises a sealing member, an intermediate ring (4), an adjusting assembly, and two spiral springs (6) all inserted into the body (2), the sealing member being used to seal the rotating shaft (1) and the body (2) when the vehicle is stopped; the intermediate ring (4) is sleeved on the rotating shaft (1) and can slide along the axial direction of the rotating shaft (1); the spiral spring (6) is sleeved on the rotating shaft (1), the two spiral springs (6) are respectively arranged on both sides of the intermediate ring (4), one end of the spiral spring (6) is arranged on the intermediate ring (4), and the other end is arranged on the rotating shaft (1), the spiral directions of the two spiral springs (6) are opposite, and both are used to spirally seal the rotating shaft (1) and the body (2); the adjusting assembly is configured to be able to adjust the moving direction of the intermediate ring (4) according to the direction of rotation of the rotating shaft (1), so that when the rotating shaft (1) rotates, the intermediate ring (4) moves to the side of the spiral spring (6) having a spiral direction opposite to the direction of rotation of the rotating shaft (1).

2. The reducer sealing mechanism according to claim 1, characterized in that: The adjustment component comprises an adjustment ring (501), two annular conical surfaces (502), a plurality of balls (503) and a plurality of slides (504); the adjustment ring (501) is fixedly inserted in the body (2), and is coaxially sleeved on the outer circumference of the rotating shaft (1), and is arranged at intervals with the intermediate ring (4); the two annular conical surfaces (502) are symmetrically arranged on the inner circumferential wall of the adjustment ring (501), and the expanded openings of the annular conical surfaces (502) are arranged away from the middle of the adjustment ring (501); the balls (503) are inserted on the outer circumferential wall of the intermediate ring (4), and can slide elastically in the radial direction of the intermediate ring (4), and can roll freely, and the balls (503) can form a guide fit with the annular conical surfaces (502); the slides (504) are obliquely inserted on the outer circumferential wall of the intermediate ring (4), and can slide elastically in the radial direction of the intermediate ring (4); the plurality of balls (503) and the plurality of slides (504) are alternately arranged along the circumferential direction.

3. The reducer sealing mechanism according to claim 2, characterized in that: The reducer sealing mechanism also includes an elastic ring (7), which is coaxially inserted on the inner peripheral wall of the adjustment ring (501) and can form an abutment fit with the sliding plate (504).

4. The reducer sealing mechanism according to claim 1, characterized in that: The sealing member is a sealing ring (3), which is sleeved on the rotating shaft (1) and can slide elastically along the axial direction of the rotating shaft (1).

5. The reducer sealing mechanism according to claim 4, characterized in that: The reducer sealing mechanism also includes a moving assembly (8) inserted into the body (2), and the moving assembly (8) is configured to drive the sealing ring (3) to move when the spiral spring (6) spirally seals the rotating shaft (1) and the body (2), so that the sealing ring (3) and the body (2) are disengaged.

6. The reducer sealing mechanism according to claim 5, characterized in that: The moving assembly (8) comprises a slide groove (801), a mounting shaft (802), a roller (803) and a centrifugal part (804); the slide groove (801) is arranged on the circumferential side wall of the rotating shaft (1) and extends along the axial direction of the rotating shaft (1); the mounting shaft (802) is arranged on the sealing ring (3), the axis of the mounting shaft (802) is arranged perpendicular to the axis of the rotating shaft (1), and the mounting shaft (802) can rotate around its own axis; the roller (803) is fixedly sleeved on the mounting shaft (802) and is inserted into the slide groove (801) at the same time, and forms a friction fit with the slide groove (801) so as to be able to slide along the slide groove (801); the centrifugal part (804) is arranged on the mounting shaft (802) and can drive the mounting shaft (802) to rotate under the action of centrifugal force when the rotating shaft (1) rotates.

7. The reducer sealing mechanism according to claim 6, characterized in that: There are multiple moving components (8), which are arranged in the circumferential direction.

8. The reducer sealing mechanism according to claim 1, characterized in that: The cross-sectional shape of the spring is square.

9. The reducer sealing mechanism according to claim 1, characterized in that: The sealing element is an oil seal, which is sleeved on the rotating shaft (1).

10. A reducer, characterized in that: The reducer comprises a rotating shaft (1) and a body (2), and the rotating shaft (1) and the body (2) are sealed by a reducer sealing mechanism according to any one of claims 1 to 9.

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