Winding speed reducer and operation machine

Abstract

The utility model belongs to the technical field of engineering machinery and provides a winch speed reducer and an operation machine.The winch speed reducer comprises a planetary speed reduction mechanism, a framework bearing and a supporting seat, the planetary speed reduction mechanism comprises a speed reduction output gear ring, and the framework bearing comprises an outer ring bearing seat and a bearing inner ring; the outer ring bearing seat is fixedly connected with the axial end of the speed reduction output gear ring, one end of the supporting seat extends into the outer ring bearing seat and is matched with the bearing inner ring in a sleeved mode, and the other end of the supporting seat extends out of the end face of the bearing inner ring and is matched with the axial end of the end, opposite to the speed reduction output gear ring, of the outer ring bearing seat in a sealed mode. The supporting seat abuts against the axial end of the outer ring bearing seat in a sealed mode, and a sealing lip or an oil seal of the framework bearing can be isolated from the external environment, so that the sealing lip or the oil seal is prevented from being corroded by external pollutants.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and particularly relates to a hoisting speed reducer and a working machine. Background Art

[0002] Many existing working machines are equipped with hoisting devices, such as crane trucks, net spanning operation vehicles, etc. The hoisting device generally consists of a hoisting driving member, a hoisting speed reducer and a hoisting drum. The power output by the hoisting driving member is decelerated by the hoisting speed reducer, so as to realize the low-speed and high-horsepower operation of the hoisting drum.

[0003] The hoisting speed reducer generally includes a support seat and a planetary reduction mechanism capable of rotating relative to the support seat. The reduction output gear ring of the planetary reduction mechanism generally extends outside the support seat and is radially matched with the support seat through a skeleton bearing. However, the existing skeleton bearings are generally directly exposed to the external environment. After such speed reducers are used for a period of time, the sealing lips and oil seals of the skeleton bearings are very easy to age, resulting in the inability of the hoisting speed reducer to work properly. Summary of the Utility Model

[0004] Aiming at the above defects or deficiencies, the utility model provides a hoisting speed reducer and a working machine, aiming to solve the technical problem that the sealing lips and oil seals of the skeleton bearings of the existing hoisting speed reducers are prone to aging, resulting in a short service life of the hoisting speed reducers.

[0005] To achieve the above object, the utility model provides a hoisting speed reducer, which includes a planetary reduction mechanism, a skeleton bearing and a support seat. The planetary reduction mechanism includes a reduction output gear ring. The skeleton bearing includes an outer ring bearing seat and a bearing inner ring. The outer ring bearing seat is fixedly connected to the axial end of the reduction output gear ring. One end of the support seat extends into the outer ring bearing seat and is sleeved and matched with the bearing inner ring, and the other end extends out of the end face of the bearing inner ring and is hermetically matched with the axial end of the outer ring bearing seat facing away from the reduction output gear ring.

[0006] In an embodiment of the utility model, the support seat includes a first seat body and a socket part. The first seat body is placed outside the axial end of the outer ring bearing seat, and a sealing structure is provided between the first seat body and the axial end of the outer ring bearing seat. The socket part extends into the bearing inner ring and is sleeved and matched with the bearing inner ring.

[0007] In an embodiment of the utility model, the sealing structure is a labyrinth seal.

[0008] In an embodiment of the present utility model, the outer ring bearing seat includes a second seat body and an abutting and sealing portion. The second seat body is located radially outside the inner ring of the bearing and is fixedly connected to the reduction output gear ring. The abutting and sealing portion extends axially from the inner ring of the bearing towards the support seat, and the abutting and sealing portion is in sealing abutment with the end face of the support seat. There is a radial gap between the socket portion and the abutting and sealing portion to form a sealed protection cavity.

[0009] In an embodiment of the present utility model, the skeleton bearing further includes an oil seal disposed in the sealed protection cavity.

[0010] In an embodiment of the present utility model, an installation cavity is provided in the support seat. The planetary reduction mechanism further includes a reduction input shaft. The reduction output gear ring is coaxially sleeved on the reduction input shaft. A multi-stage reduction gear train is provided between the reduction output gear ring and the reduction input shaft. The reduction input shaft includes a power input end extending into the installation cavity, and the power input end is coaxially arranged with the support seat.

[0011] In an embodiment of the present utility model, the winch reducer further includes a piston and a brake pad. The brake pad is sleeved on the power input end and the inner wall of the installation cavity through a brake shaft sleeve. The piston is disposed in the installation cavity and can move axially. The piston is used to push the brake pad to lock and separate.

[0012] In an embodiment of the present utility model, a sealing ring is provided between the piston and the inner wall of the installation cavity.

[0013] In an embodiment of the present utility model, the winch reducer further includes an end cover disposed at one end of the reduction output gear ring facing away from the support seat. The end cover seals the axial opening of the reduction output gear ring and is fixedly connected to the reduction output gear ring.

[0014] To achieve the above object, the present utility model further provides a working apparatus, wherein the working apparatus includes the winch reducer described above.

[0015] Through the above technical solutions, the winch reducer provided by the embodiments of the present utility model has the following beneficial effects:

[0016] Since one end of the support seat extends into the inner ring of the bearing and is sleeved and matched with the inner ring of the bearing, and the other end extends out from the axial end of the inner ring of the bearing and is in sealing contact with the side of the outer ring bearing seat facing away from the reduction output gear ring. Through the sealing abutment between the support seat and the axial end of the outer ring bearing seat, the sealing lip or oil seal of the skeleton bearing can be isolated from the external environment, thereby increasing the difficulty of the pollutants or oxidation substances in the external air eroding the sealing lip or oil seal, increasing the service life of the sealing lip and the oil seal, and ensuring that the winch reducer can operate reliably for a long time.

[0017] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0018] The accompanying drawings are used to provide an understanding of the present utility model and form a part of the specification. Together with the following specific embodiments, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the accompanying drawings:

[0019] Figure 1 is a schematic cross-sectional structure view of a hoisting speed reducer according to an embodiment of the present utility model;

[0020] Figure 2 is according to an embodiment of the present utility model Figure 1 and is an enlarged structure view of part A in

[0021] Explanation of Reference Numerals in the Drawings

[0022] 1. Planetary reduction mechanism; 11. Reduction output gear ring; 12. Reduction input shaft; 121. Power input end; 13. First-stage planetary gear; 14. Second-stage sun gear; 15. Second-stage planetary gear; 2. Skeleton bearing; 21. Outer ring bearing seat; 211. Second seat body; 212. Abutted sealing part; 22. Bearing inner ring; 23. Oil seal; 3. Support seat; 31. First seat body; 32. Socket part; 33. Installation cavity; 41. Sealing structure; 42. Sealing protection cavity; 51. Piston; 52. Brake pad; 54. End cover; 56. Brake shaft sleeve. Specific Embodiments

[0023] The following describes in detail specific embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.

[0024] The hoisting speed reducer of the present utility model will be described below with reference to the accompanying drawings.

[0025] Generally, a sealing lip or an oil seal 23 is provided between the outer ring bearing seat 21 and the bearing inner ring 22. If the sealing lip or the oil seal 23 directly contacts pollutants in the air, it is easily contaminated and corroded, resulting in poor operation of the skeleton bearing 2.

[0026] To solve the above problems, the present utility model provides a hoisting speed reducer, as shown in Figure 1 and Figure 2 , the hoisting speed reducer includes:

[0027] A planetary reduction mechanism 1, which is composed of several groups of planetary reduction gear trains. Each group of planetary reduction gear trains includes a sun gear, a planetary gear, and an outer gear ring. Among them, the planetary reduction mechanism 1 includes a reduction output gear ring 11 that serves as the final power output of the hoisting speed reducer, and the reduction output gear ring 11 is mainly used to connect with the hoisting drum;

[0028] The cage bearing 2 includes an outer ring bearing seat 21 and a bearing inner ring 22 that are coaxially sleeved, and rollers disposed between the outer ring bearing seat 21 and the bearing inner ring 22. The outer ring bearing seat 21 is fixedly connected to the axial end of the reduction output gear ring 11;

[0029] The support seat 3 has one end extending into the outer ring bearing seat 21 and sleeved with the bearing inner ring 22 in a fitting manner, and the other end extending out of the end face of the bearing inner ring 22 and hermetically fitting with the axial end of the outer ring bearing seat 21 facing away from the reduction output gear ring 11.

[0030] Since one end of the support seat 3 extends into the bearing inner ring 22 and is sleeved with the bearing inner ring 22 in a fitting manner, and the other end extends out from the axial end of the bearing inner ring 22 and is in sealed contact with the side of the outer ring bearing seat 21 facing away from the reduction output gear ring 11, through the sealed abutment between the support seat 3 and the axial end of the outer ring bearing seat 21, the sealing lip or oil seal 23 of the cage bearing 2 can be isolated from the external environment, thereby increasing the difficulty of contaminants or oxidizing substances in the external air eroding the sealing lip or oil seal 23, increasing the service life of the sealing lip and oil seal 23, and ensuring the long-term reliable operation of the hoisting speed reducer.

[0031] Specifically, as Figure 1 and Figure 2 shown, in the embodiment of the present utility model, the support seat 3 includes a first seat body 31 and a socket part 32. The first seat body 31 is disposed outside the axial end of the outer ring bearing seat 21 facing away from the reduction output gear ring 11. The socket part 32 extends into the bearing inner ring 22 and is sleeved with the bearing inner ring 22 in a fitting manner. The diameter of the socket part 32 is smaller than the diameter of the first seat body 31. A limiting step is formed between the socket part 32 and the first seat body 31. The limiting step has a step side surface. By providing a sealing structure 41 between the step side surface and the axial end face of the outer ring bearing seat 21, the sealing lip or oil seal 23 of the cage bearing 2 disposed inside the step side surface can be isolated from the external environment, thereby preventing the sealing lip or oil seal 23 from contacting contaminants and increasing the service life and reliability of the cage bearing 2.

[0032] In the embodiment of the present utility model, the type of the sealing structure 41 between the step side surface and the outer ring bearing seat 21 can be a labyrinth seal with better sealing effect or an ordinary sealing ring seal. In order to reduce the running resistance of the hoisting speed reducer, lubricating grease is preferably filled between the step side surface and the axial end of the outer ring bearing seat 21.

[0033] Furthermore, as Figure 1 and Figure 2As shown in the figure, in the embodiment of the present utility model, the outer ring bearing seat 21 includes a second seat body 211 and a holding and sealing portion 212. The second seat body 211 is located radially outside the bearing inner ring 22 of the cage bearing 2. The second seat body 211 is used for fixedly connecting with the axial end face of the reduction output gear ring 11. The holding and sealing portion 212 extends out of the end face of the bearing inner ring 22 of the cage bearing 2 and extends towards the support seat 3. The axial end of the holding and sealing portion 212 is used for sealingly abutting against the stepped side face of the support seat 3. There is a radial gap between the socket portion 32 and the holding and sealing portion 212 to form a sealing and protecting cavity 42. The sealing and protecting cavity 42 can be filled with sealing grease. By providing the sealing and protecting cavity 42, the isolation effect on the sealing lip and the oil seal 23 can be further increased, and the probability of the sealing lip and the oil seal 23 contacting the air is greatly reduced. Filling the sealing and protecting cavity 42 with sealing grease can immerse the sealing lip or the oil seal 23 in the lubricating grease, ensuring sufficient lubricating grease in the cage bearing 2. At the same time, when the amount of lubricating grease between the stepped side face and the axial end of the outer ring bearing seat 21 decreases, the sealing and protecting cavity 42 can supplement the lubricating grease at this position.

[0034] In the embodiment of the present utility model, the oil seal 23 can be arranged in the sealing and protecting cavity 42 and abut against the axial end of the cage bearing 2.

[0035] As Figure 1 shown in the figure, in the embodiment of the present utility model, an installation cavity 33 is provided in the support seat 3. The planetary reduction mechanism 1 further includes a reduction input shaft 12. The reduction output gear ring 11 is arranged outside the reduction input shaft 12. A multi-stage reduction gear train is provided between the reduction output gear ring 11 and the reduction input shaft 12. The reduction input shaft 12 includes a power input end 121 extending into the installation cavity 33, and the power input end 121 is coaxially arranged with the support seat 3.

[0036] Specifically, the planetary reduction mechanism 1 can be a single-stage reduction mechanism, a two-stage reduction mechanism or even a reduction mechanism with more stages. Taking a two-stage reduction mechanism composed of two sets of planetary gear trains as an example, the reduction input shaft 12 can be the first-stage sun gear shaft in the two-stage reduction mechanism. The first-stage sun gear shaft is generally used for connecting with the output shaft of a hydraulic motor or an electric motor. After the power output by the hydraulic motor or the electric motor is transmitted to the reduction input shaft 12, it passes through the first-stage planetary gear 13, the second-stage sun gear 14, and the second-stage planetary gear 15, and finally is transmitted to the reduction output gear ring 11 at the outermost end. Connecting the reduction output gear ring 11 with the hoisting drum can realize the drive of the hoisting drum. By providing the installation cavity 33 in the support seat 3 and extending a part of the reduction input shaft 12 into the installation cavity 33, it is convenient to drive the reduction input shaft 12 to connect with the output shaft of the hydraulic motor or the electric motor.

[0037] As Figure 1As shown, in an embodiment of the present utility model, the winch speed reducer further includes a piston 51 and a brake pad 52. The brake pad 52 is arranged between the power input end 121 and the inner wall of the installation cavity 33 through a brake shaft sleeve 56. The piston 51 is arranged in the installation cavity 33 and can move axially. The piston 51 is used to push the brake pad 52 to lock and separate. For a crane, to adapt to the working condition where the winch drum needs to start and stop frequently, a braking mechanism is generally arranged in the winch speed reducer. The braking mechanism of the present utility model includes a piston 51, a brake pad 52, and a brake shaft sleeve 56 which is sleeved outside the power input end 121 of the reduction input shaft 12 and is fixedly connected to the brake pad 52. The brake pad 52 is fixedly connected to the brake shaft sleeve 56. By driving the piston 51 to push the brake pad 52, the brake pad 52 can be made to contact the support seat 3, so as to achieve the braking of the reduction input shaft 12 under the action of friction force.

[0038] In an embodiment of the present utility model, the winch speed reducer further includes an end cover 54 arranged at one end of the reduction output gear ring 11 facing away from the support seat 3. The end cover 54 seals the axial opening on one side of the reduction output gear ring 11 and is fixedly connected to the reduction output gear ring 11. Specifically, the reduction output gear ring 11 is of a cylindrical structure. The support seat 3 and the end cover 54 are used to seal the axial openings at both ends of the reduction output gear ring 11 respectively. An installation cavity 33 is arranged on the support seat 3 to facilitate the transmission connection between the output shaft of the motor or hydraulic motor and the reduction input shaft 12 in the reduction output gear ring 11.

[0039] To achieve the above object, the present utility model further provides a working device. Among them, the working device includes the winch speed reducer described above. The working machinery can be a crane, a net sealing and spanning device, a long-arm type garbage fishing device, etc. that need to wind and unwind ropes. Since the working device adopts all the technical solutions of the above embodiment, it has at least the beneficial effects brought by the above embodiment, which will not be repeated here.

[0040] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0043] Although the embodiments of the present utility model have been described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A winch reducer, characterized in that: The winch reducer comprises: A planetary reduction mechanism (1), comprising a reduction output ring gear (11); A skeleton bearing (2) comprising an outer ring bearing seat (21) and a bearing inner ring (22), wherein the outer ring bearing seat (21) is fixedly connected to an axial end of the reduction output gear ring (11); and The support seat (3) has one end extending into the outer ring bearing seat (21) and sleeve-fitting with the bearing inner ring (22), and the other end sealingly fitting with the axial end of the outer ring bearing seat (21) facing away from the reduction output gear ring (11).

2. The winch reducer according to claim 1, characterized in that: The support seat (3) comprises a first seat body (31) and a sleeve connection portion (32), wherein the first seat body (31) is disposed outside the axial end of the outer ring bearing seat (21) and a sealing structure (41) is provided between the first seat body (31) and the axial end of the outer ring bearing seat (21), and the sleeve connection portion (32) extends into the bearing inner ring (22) and is sleeve-fitted with the bearing inner ring (22).

3. The winch reducer according to claim 2, characterized in that: The sealing structure (41) is a labyrinth seal.

4. The winch reducer according to claim 2, characterized in that: The outer ring bearing seat (21) comprises a second seat body (211) and a supporting seal portion (212), wherein the second seat body (211) is located radially outside the bearing inner ring (22) and is fixedly connected to the reduction output gear ring (11), and the supporting seal portion (212) extends toward the support seat (3) from the end surface of the bearing inner ring (22), and the supporting seal portion (212) is sealingly supported against the axial end surface of the support seat (3), and the sleeve portion (32) and the supporting seal portion (212) are radially spaced apart to form a sealing protection cavity (42).

5. The winch reducer according to claim 4, characterized in that: The skeleton bearing (2) also includes an oil seal (23) arranged in the sealing protection cavity (42).

6. The winch reducer according to any one of claims 1 to 5, characterized in that: The support seat (3) is provided with a mounting cavity (33), the planetary reduction mechanism (1) also includes a reduction input shaft (12), the reduction output ring gear (11) is coaxially sleeved on the reduction input shaft (12), a multi-stage reduction gear train is provided between the reduction output ring gear (11) and the reduction input shaft (12), the reduction input shaft (12) includes a power input end (121) extending into the mounting cavity (33), and the power input end (121) is coaxially arranged with the support seat (3).

7. The winch reducer according to claim 6, characterized in that: The winch reducer also includes a piston (51) and a brake pad (52); the brake pad (52) is arranged between the power input end (121) and the inner wall of the installation cavity (33) through a brake sleeve (56); the piston (51) is arranged in the installation cavity (33) and can move axially; the piston (51) is used to push the brake pad (52) to lock and release.

8. The winch reducer according to claim 7, characterized in that: A sealing ring is provided between the piston (51) and the inner wall of the installation cavity (33).

9. The winch reducer according to any one of claims 1 to 5, characterized in that: The winch reducer further comprises an end cover (54) arranged at an end of the reduction output gear ring (11) facing away from the support seat (3), wherein the end cover (54) blocks the axial opening of the reduction output gear ring (11) and is fixedly connected to the reduction output gear ring (11).

10. A working machine, characterized in that: It comprises a winch reducer according to any one of claims 1 to 9.

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