Walking reduction gear with clutch and engineering machine

Abstract

The utility model belongs to engineering machinery technical field discloses a walking speed reducer with clutch and engineering machinery. Walking speed reducer with clutch includes fixed casing, input shaft and clutch. Input shaft rotatably sets up in fixed casing, clutch includes piston, clutch assembly, transmission assembly, first bearing and clutch casing, and piston sets up in fixed casing, clutch casing rotatably sets up in fixed casing, and clutch assembly is set up on input shaft and is located between input shaft and clutch casing, transmission assembly is slidably arranged in clutch casing and transmission assembly is located between piston and clutch assembly, and first bearing sets up in the end part of transmission assembly. The walking speed reducer with clutch can increase the size of clutch casing along the axial direction of input shaft through setting transmission assembly, and then the oil storage space between clutch casing and fixed casing is increased, and the overall heat dissipation capacity and service life of parts are improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a walking speed reducer with a clutch and engineering machinery. Background Technology

[0002] Existing travel reducers for construction machinery such as graders and scrapers include a fixed housing, an input shaft, a clutch, and a planetary mechanism. The clutch includes a piston, a clutch assembly, a bearing, and a clutch housing. The bearing is located at the end of the piston. When the piston moves towards the clutch assembly, the bearing directly presses against the clutch assembly. In the clutch assembly, the inner wall of one of the friction plates and the mating steel plates is connected to the input shaft, and the outer wall of the other is connected to the first output housing. This allows the input shaft to drive the first output housing to rotate via the clutch assembly when it rotates. The bearing, directly pressing against the clutch assembly, can rotate simultaneously with the clutch assembly. This allows the clutch assembly to rotate when pressed, even when the piston is not rotating. This travel reducer has few components and a compact structure, which results in a small oil storage space between the clutch housing and the fixed housing, preventing the storage of excessive oil and leading to poor heat dissipation. Utility Model Content

[0003] The purpose of this invention is to provide a travel reducer with a clutch and engineering machinery, which improves the heat dissipation capacity of the travel reducer with a clutch.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A travel reducer with a clutch, including:

[0006] Fixed housing;

[0007] The input shaft is rotatably mounted within the fixed housing;

[0008] A clutch includes a piston, a clutch assembly, a transmission assembly, a first bearing, and a clutch housing. The piston is disposed within the fixed housing, and the clutch housing is rotatably disposed within the fixed housing. The clutch assembly includes a friction plate and a mating steel plate, both of which are sleeved on the input shaft. One of the friction plate and the mating steel plate is connected to the input shaft, and the other is connected to the clutch housing. The transmission assembly is slidably disposed within the clutch housing and located between the piston and the clutch assembly. The first bearing is disposed at the end of the transmission assembly facing the piston. When the piston moves axially toward the clutch assembly along the input shaft, the piston presses against the first bearing, causing the transmission assembly to press against the clutch assembly.

[0009] As an optional solution, the clutch housing is provided with a first groove and a second groove at both ends along the axial direction of the input shaft;

[0010] The transmission assembly includes a pressure cap, a pressure plate, and multiple fasteners. The pressure cap and the pressure plate are slidably disposed in the first slide groove and the second slide groove, respectively, and are fixedly connected by the multiple fasteners. The end of the pressure cap facing the piston is provided with the first bearing, and the pressure plate can press against the clutch assembly.

[0011] As an alternative, the fastener includes a first screw and a sleeve fitted onto the first screw, the pressure cap and the pressure plate are fixedly connected by the first screw, and the sleeve is sandwiched between the pressure cap and the pressure plate.

[0012] As an alternative, a compression spring is provided between the pressure cap and the clutch housing, the compression spring being configured to drive the pressure cap to move toward the piston, so that the pressure cap drives the pressure plate away from the clutch assembly.

[0013] As an optional solution, the clutch-equipped travel reducer also includes a planetary structure, which includes a secondary planetary gear carrier. The secondary planetary gear carrier is fixedly connected to the fixed housing, and the fixed housing and the secondary planetary gear carrier are respectively provided with a first mounting groove and a second mounting groove.

[0014] The clutch further includes a second bearing and a third bearing, which are respectively installed in the first mounting groove and the second mounting groove, and are respectively nested at both ends of the clutch housing along the axial direction of the input shaft.

[0015] As an alternative, the clutch housing includes a first housing and a second housing, which are fixedly connected by a plurality of second screws.

[0016] As an alternative, an oil chamber is provided between the fixed housing and the piston. The fixed housing is provided with an oil hole communicating with the oil chamber. Hydraulic oil enters the oil chamber through the oil hole and can generate a thrust on the piston to move toward the clutch assembly.

[0017] As an alternative, a retaining ring is provided on the outer peripheral surface of the input shaft, and the retaining ring is located between any two adjacent pieces of one of the input shafts connected to it.

[0018] As an alternative, the first bearing is a thrust bearing.

[0019] Construction machinery, including the clutch-equipped travel reducer described in any of the above-mentioned solutions.

[0020] The beneficial effects of this utility model are:

[0021] The clutch-equipped travel reducer provided by this utility model can drive the transmission component to move and press the clutch component against the first bearing when the piston presses against the first bearing, so that the piston can transmit torque through the transmission component. By setting the transmission component, the axial dimension of the clutch housing along the input shaft can be increased, thereby increasing the oil storage space between the clutch housing and the fixed housing, so that the oil storage space can store more oil, improve the overall heat dissipation capacity and the service life of the components. Attached Figure Description

[0022] Figure 1 This is the first sectional view of the clutch-equipped travel reducer provided in this embodiment of the utility model;

[0023] Figure 2 This is a second sectional view of the clutch-equipped travel reducer provided in this embodiment of the utility model.

[0024] In the picture:

[0025] 1. Fixed housing; 11. Oil hole; 12. Oil storage space;

[0026] 2. Input shaft; 21. Retaining ring;

[0027] 3. Clutch; 31. Piston; 32. Clutch assembly; 33. Transmission assembly; 331. Pressure cap; 332. Pressure plate; 333. First screw; 334. Sleeve; 34. First bearing; 35. Clutch housing; 351. First housing; 352. Second housing; 36. Compression spring; 37. Second bearing; 38. Third bearing;

[0028] 4. Planetary structure; 41. First-stage sun gear; 42. First-stage internal gear; 43. First-stage planetary gear assembly; 44. First-stage planetary gear carrier; 45. Second-stage sun gear; 46. Second-stage internal gear; 47. Second-stage planetary gear assembly; 48. Second-stage planetary gear carrier;

[0029] 5. Output housing. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1-2 As shown, this utility model embodiment provides a walking speed reducer with a clutch, which is applied to construction machinery, such as graders or scrapers.

[0035] The clutch-equipped travel reducer includes a fixed housing 1, an input shaft 2, and a clutch 3. The fixed housing 1 is mounted on the chassis of the construction machinery. The input shaft 2 is rotatably disposed within the fixed housing 1 and can be driven to rotate by a drive motor or a hydraulic motor. The clutch 3 includes a piston 31, a clutch assembly 32, a transmission assembly 33, a first bearing 34, and a clutch housing 35. The piston 31 is disposed within the fixed housing 1, and the input shaft 2 passes through the central hole of the piston 31, with a gap between the input shaft 2 and the piston 31. The piston 31 can reciprocate axially along the input shaft 2. The clutch housing 35 is rotatably disposed within the fixed housing 1. The clutch assembly 32 is sleeved on the input shaft 2 and located between the input shaft 2 and the clutch housing 35. The clutch assembly 32 includes friction plates and mating steel plates. Both friction plates and mating steel plates are mounted on the input shaft 2. The inner wall of one of the friction plates and mating steel plates is connected to the input shaft 2, and the outer wall of the other is connected to the first output housing 5. That is, when the friction plates and mating steel plates in the clutch assembly 32 are pressed together, the input shaft 2 can drive the clutch housing 35 to rotate through the clutch assembly 32. The transmission assembly 33 is slidably disposed in the clutch housing 35 and is located between the piston 31 and the clutch assembly 32. The input shaft 2 passes through the central hole of the transmission assembly 35, and there is a gap between the transmission assembly 35 and the input shaft 2. The end of the transmission assembly 33 facing the piston 31 is provided with an annular protrusion. The first bearing 34 is mounted on the annular protrusion, and the first bearing 34 protrudes from the annular protrusion on one side facing the piston 31. When the piston 31 moves toward the clutch assembly 32 along the axial direction of the input shaft 2, the piston 31 presses against the first bearing 34 to drive the transmission assembly 33 to move toward the clutch assembly 32 and press against the clutch assembly 32, thereby realizing the transmission of power.

[0036] In this embodiment, the first bearing 34 may be selected as a thrust bearing.

[0037] When the piston 31 presses against the first bearing 34, the clutch-equipped travel reducer can drive the transmission component 33 to move through the first bearing 34 and cause the transmission component 33 to press against the clutch component 32, so that the piston 31 can transmit torque through the transmission component 33. By setting the transmission component 33, the axial dimension of the clutch housing 35 along the input shaft 2 can be increased, thereby increasing the oil storage space 12 between the clutch housing 35 and the fixed housing 1, so that the oil storage space 12 can store more oil, improve the overall heat dissipation capacity and the service life of the components.

[0038] In this embodiment, the clutch-equipped travel reducer further includes a planetary structure 4 and an output housing 5. The planetary structure 4 includes a first-stage sun gear 41, a first-stage internal gear 42, a first-stage planetary gear assembly 43, a first-stage planetary gear carrier 44, a second-stage sun gear 45, a second-stage internal gear 46, a second-stage planetary gear assembly 47, and a second-stage planetary gear carrier 48. The first-stage internal gear 42 and the second-stage internal gear 46 are mounted on the output housing 5. The first-stage sun gear 41 is fixedly connected to the clutch housing 35. The first-stage planetary gear assembly 43 is mounted on the first-stage planetary gear carrier 44, and the first-stage planetary gear meshes simultaneously with the first-stage sun gear 41 and the first-stage internal gear 42 of the output housing 5. The second-stage sun gear 45 is connected to the first-stage planetary gear carrier 44. The second-stage planetary gear carrier 48 is fixedly connected to the fixed housing 1. The second-stage planetary gear assembly 47 is mounted on the second-stage planetary gear carrier 48 and meshes with the second-stage sun gear 45. At the same time, the second-stage planetary gear assembly 47 also meshes with the second-stage internal gear 46 to achieve the torque transmission for driving the output housing 5 to rotate.

[0039] Specifically, the clutch housing 35 has a first groove and a second groove at both ends along the axial direction of the input shaft 2; the transmission assembly 33 includes a pressure cover 331, a pressure plate 332, and multiple fasteners. The pressure cover 331 and the pressure plate 332 are slidably disposed in the first groove and the second groove, respectively, and are fixedly connected by multiple fasteners. The input shaft 2 passes through the center hole of the pressure cover 331 and the center hole of the pressure plate 332. There are gaps between the input shaft 2 and the pressure cover 331, and between the input shaft 2 and the pressure plate 332. That is, the pressure cover 331 and the pressure plate 332 are fixed together by fasteners to achieve no relative gap between the pressure cover 331 and the pressure plate 332. Movement; it is understood that both the pressure cap 331 and the pressure plate 332 are sleeved on the outer periphery of the input shaft 2, and there is a gap between them; the end of the pressure cap 331 facing the piston 31 is provided with an annular protrusion for mounting the first bearing 34. When the piston 31 moves toward the clutch assembly 32 along the axial direction of the input shaft 2, the piston 31 presses against the first bearing 34, thereby driving the pressure cap 331 to move toward the clutch assembly 32. Since the pressure cap 331 and the pressure plate 332 are fixedly connected by fasteners, the pressure plate 332 presses against the clutch assembly 32, so that the pressure plate 332 transmits the axial force of the piston 31 to the clutch assembly 32 to achieve transmission torque.

[0040] In this embodiment, the pressure plate 332 presses against the mating steel sheet of the clutch assembly 32, so that the friction plate and the mating steel sheet are in contact with each other to achieve torque transmission.

[0041] More specifically, the fastener includes a first screw 333 and a sleeve 334 fitted onto the first screw 333. The pressure cap 331 and the pressure plate 332 are fixedly connected by the first screw 333, and the sleeve 334 is sandwiched between the pressure cap 331 and the pressure plate 332. This structure achieves a fixed connection between the pressure cap 331 and the pressure plate 332 by setting the first screw 333. Then, the sleeve 334 is fitted onto the first screw 333 and sandwiched between the pressure cap 331 and the pressure plate 332, so that when the piston 31 presses against the first bearing 34 and the pressure plate 332 presses against the clutch assembly 32, the pressure cap 331 and the pressure plate 332 bear axial force through the sleeve 334, thus avoiding damage to the threads of the first screw 333.

[0042] To enable the piston 31 to move axially toward the clutch assembly 32 along the input shaft 2, an oil cavity is provided between the fixed housing 1 and the piston 31. In this embodiment, the fixed housing 1 is provided with a third slide groove, and the piston 31 is slidably disposed in the third slide groove. A recess is provided on the side of the piston 31 facing the bottom of the third slide groove, and the recess and the bottom of the third slide groove of the fixed housing 1 form an oil cavity. The fixed housing 1 is provided with an oil hole 11 communicating with the third slide groove, that is, the oil hole 11 is communicating with the oil cavity. Hydraulic oil enters the oil cavity through the oil hole 11 and can generate a thrust on the piston 31, so that the piston 31 can move axially toward the clutch assembly 32 along the input shaft 2 and press against the clutch assembly 32.

[0043] Furthermore, a compression spring 36 (multiple springs can be arranged circumferentially) is provided between the pressure cap 331 and the clutch housing 35. When hydraulic oil enters the oil chamber through the oil hole 11, the piston 31 moves axially toward the clutch assembly 32 along the input shaft 2, and the compression spring 36 is compressed. When the hydraulic oil is disconnected, the compression spring 36 releases the compression force, so that the compression spring 36 drives the pressure cap 331 to move toward the piston 31. The pressure cap 331 drives the pressure plate 332 away from the clutch assembly 32, thereby disconnecting the power transmission.

[0044] Specifically, the fixed housing 1 and the secondary planetary gear carrier 48 are respectively provided with a first mounting groove and a second mounting groove; the clutch 3 also includes a second bearing 37 and a third bearing 38, which are respectively installed in the first mounting groove and the second mounting groove, and are respectively nested at both ends of the clutch housing 35 along the axial direction of the input shaft 2. In this structure, the second bearing 37 and the third bearing 38 can play a supporting and centering role, making the power transmission more stable and reducing abnormal vibration caused by eccentricity due to processing or assembly errors; and the second bearing 37 and the third bearing 38 are respectively provided at both ends of the clutch housing 35, avoiding the second bearing 37 and the third bearing 38 occupying the oil storage space 12.

[0045] Optionally, for ease of installation, the clutch housing 35 includes a first housing 351 and a second housing 352. The first housing 351 is provided with a first sliding groove and a second sliding groove. During installation, the cover 331 can be placed in the first sliding groove, the pressure plate 332 and the clutch assembly 32 can be placed in the first housing 351, and then the second housing 352 can be fixedly connected to the first housing 351 by a plurality of second screws.

[0046] Optionally, in order to limit the axial movement of the input shaft 2, a retaining ring 21 is provided on the outer peripheral surface of the input shaft 2, and the retaining ring 21 is located between any two adjacent pieces of the one connected to the input shaft 2.

[0047] In this embodiment, the inner circular surface of the friction plate is fixedly connected to the outer peripheral surface of the input shaft 2, and the outer circular surface of the mating steel plate is fixedly connected to the inner peripheral surface of the second sliding groove of the first housing 351; the retaining ring 21 is located between any two adjacent friction plates.

[0048] This utility model embodiment also provides an engineering machinery, including the above-mentioned walking reducer with clutch, which improves internal heat dissipation, increases the service life of components, and reduces the complexity of components, thereby reducing assembly difficulty and production costs.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A travel reducer with a clutch, characterized in that, include: Fixed housing (1); The input shaft (2) is rotatably disposed within the fixed housing (1); The clutch (3) includes a piston (31), a clutch assembly (32), a transmission assembly (33), a first bearing (34), and a clutch housing (35). The piston (31) is disposed within the fixed housing (1), and the clutch housing (35) is rotatably disposed within the fixed housing (1). The clutch assembly (32) includes a friction plate and a mating steel plate. Both the friction plate and the mating steel plate are sleeved on the input shaft (2), and one of the friction plate and the mating steel plate is connected to the input shaft (2), while the other is connected to the input shaft (2). The clutch housing (35) is connected, and the transmission assembly (33) is slidably disposed in the clutch housing (35) and located between the piston (31) and the clutch assembly (32). The first bearing (34) is disposed at the end of the transmission assembly (33) facing the piston (31). When the piston (31) moves toward the clutch assembly (32) along the axial direction of the input shaft (2), the piston (31) presses against the first bearing (34) so ​​that the transmission assembly (33) presses against the clutch assembly (32).

2. The travel reducer with clutch according to claim 1, characterized in that, The clutch housing (35) is provided with a first groove and a second groove at both ends along the axial direction of the input shaft (2); The transmission assembly (33) includes a pressure cap (331), a pressure plate (332), and a plurality of fasteners. The pressure cap (331) and the pressure plate (332) are slidably disposed in the first slide groove and the second slide groove, respectively, and are fixedly connected by the plurality of fasteners. The end of the pressure cap (331) facing the piston (31) is provided with the first bearing (34), and the pressure plate (332) can press against the clutch assembly (32).

3. The travel reducer with clutch according to claim 2, characterized in that, The fastener includes a first screw (333) and a sleeve (334) sleeved on the first screw (333). The pressure cap (331) and the pressure plate (332) are fixedly connected by the first screw (333), and the sleeve (334) is sandwiched between the pressure cap (331) and the pressure plate (332).

4. The travel reducer with clutch according to claim 2, characterized in that, A compression spring (36) is provided between the pressure cap (331) and the clutch housing (35). The compression spring (36) is configured to drive the pressure cap (331) to move toward the piston (31) so that the pressure cap (331) drives the pressure plate (332) away from the clutch assembly (32).

5. The travel reducer with clutch according to claim 1, characterized in that, The clutch-equipped travel reducer also includes a planetary structure (4), which includes a secondary planetary gear carrier (48). The secondary planetary gear carrier (48) is fixedly connected to the fixed housing (1). The fixed housing (1) and the secondary planetary gear carrier (48) are respectively provided with a first mounting groove and a second mounting groove. The clutch (3) further includes a second bearing (37) and a third bearing (38), which are respectively installed in the first mounting groove and the second mounting groove, and the second bearing (37) and the third bearing (38) are respectively nested at both ends of the clutch housing (35) along the axial direction of the input shaft (2).

6. The travel reducer with clutch according to claim 1, characterized in that, The clutch housing (35) includes a first housing (351) and a second housing (352), which are fixedly connected by a plurality of second screws.

7. The travel reducer with clutch according to claim 1, characterized in that, There is an oil cavity between the fixed housing (1) and the piston (31). The fixed housing (1) is provided with an oil hole (11) communicating with the oil cavity. Hydraulic oil enters the oil cavity through the oil hole (11) and can generate a thrust on the piston (31) to move toward the clutch assembly (32).

8. The travel reducer with clutch according to claim 1, characterized in that, The outer circumferential surface of the input shaft (2) is provided with a retaining ring (21), and the retaining ring (21) is located between any two adjacent pieces of one of the input shafts (2).

9. The travel reducer with clutch according to claim 1, characterized in that, The first bearing (34) is a thrust bearing.

10. Construction machinery, characterized in that, Includes the clutch-equipped travel reducer as described in any one of claims 1-9.

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