Wet type power take-off (PTO) assembly and tractor
By adding a coaxially rotating sleeve to the PTO input shaft of the wet PTO assembly and connecting it to the front end of the rear axle housing, the existing wet PTO structure has solved the problem of vibration or abnormal noise caused by unbalanced support, achieving higher stability and smooth operation.
Patent Information
- Application Number
- CN202421688917.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The existing wet PTO structures cause vibration or abnormal noise due to unbalanced support, which affects the stability of the tractor.
A wet PTO assembly is designed, and by adding a coaxially rotating sleeve to the PTO input shaft and connecting it to the front end of the rear axle housing, it ensures that both the PTO input shaft and the output shaft are supported and improves stability.
It effectively suppresses vibration and noise from the PTO input shaft, improves the stability of the wet PTO assembly, and ensures the stability of the tractor during operation.
Smart Images
Figure CN222742531U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tractors, and in particular relates to a wet PTO assembly and a tractor. Background Art
[0002] Existing wet PTO structures are often limited by structure and space, with only one end supported by a bearing, which sometimes causes vibration or abnormal noise, such as Figure 1 As shown, specifically: the power input end of the wet PTO is supported on the oil distribution seat through a bearing, and the power input end has only a spline connection. There is no bearing support in the suspended state. Under the action of the wet PTO's own gravity, the supports at both ends of the wet PTO will be unbalanced, causing vibration or abnormal noise inside the chassis. Utility Model Content
[0003] In order to solve the above technical problems, the utility model aims to provide a wet PTO assembly which has a simple structure and can support both the PTO output shaft and the PTO input shaft to improve stability.
[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a wet PTO assembly, comprising a wet PTO body, an oil distribution seat, a rear axle housing and a rotating sleeve, the wet PTO body is placed in the rear axle housing, and the wet PTO body has a coaxially distributed PTO input shaft and a PTO output shaft, the oil distribution seat is sleeved on the PTO output shaft, the oil distribution seat is installed on the rear axle housing, and the PTO output shaft passes through the rear end of the oil distribution seat and the rear axle housing, and is rotatably connected to the oil distribution seat and the rear axle housing through a second bearing, the front end of the rear axle housing is open, and the PTO input shaft passes through the open at the front end of the rear axle housing, the rotating sleeve is coaxially rotatably sleeved on the PTO input shaft, and is located outside the PTO housing, and the rotating sleeve is installed at the open at the front end of the rear axle housing and connected to the rear axle housing.
[0005] The beneficial effect of the above technical solution is that by adding a rotating sleeve coaxially connected to the PTO input shaft, and the rotating sleeve is connected to the front end of the rear axle housing, the PTO input shaft can also be supported, so that the stability of the PTO input shaft relative to the PTO housing is improved, and no vibration or noise occurs.
[0006] The above technical solution also includes a first bearing, which is coaxially installed between the rotating sleeve and the PTO input shaft, and the PTO input shaft is rotatably connected to the rotating sleeve through the first bearing.
[0007] The beneficial effect of the above technical solution is that the rotational connection effect between the rotating sleeve and the PTO input shaft is better.
[0008] In the above technical solution, an annular embedding groove is coaxially recessed on the inner wall of the rotating sleeve, and the outer ring of the first bearing is embedded in the embedding groove.
[0009] The beneficial effect of the above technical solution is that the first bearing is installed more stably in the rotating sleeve.
[0010] The above technical solution also includes connecting bolts. The outer edge of the rotating sleeve is provided with a connecting hole that penetrates axially, and the edge of the corresponding end of the rear axle housing is axially recessed with a connecting screw hole that is aligned with the connecting hole. The rotating sleeve is abutted against the front end of the rear axle housing and covers the open part of the front end of the rear axle housing. The connecting bolt passes through the connecting hole and is threadedly connected to the connecting screw hole to fasten the rotating sleeve to the rear axle housing.
[0011] The beneficial effect of the above technical solution is that the rotating sleeve is connected to the connecting screw hole at the front end of the rear axle housing through the connecting bolts, which makes the installation of the rotating sleeve more convenient.
[0012] The rotating sleeve in the above technical solution includes a ring plate and a retaining ring, the ring cylinder of the retaining ring is provided with an inner flange ring at one end and an outer flange ring at the other end, the inner diameter of the ring plate is smaller than the outer diameter of the inner flange ring, the outer diameter of the ring plate is consistent with the outer diameter of the outer flange ring, the ring plate and the outer flange ring are in contact with each other and coaxially distributed, and the inner sides of the two are enclosed to form the embedding groove, the outer flange ring is provided with a first sub-connecting hole, and the ring plate is provided with a second sub-connecting hole in an annular direction, the first sub-connecting hole and the second sub-connecting hole are aligned with each other and together constitute the connecting hole.
[0013] The beneficial effect of the above technical solution is that the mounting groove is formed by the ring plate and the retaining ring, so that the installation of the first bearing on the rotating sleeve is more convenient.
[0014] In the above technical solution, the edge of the ring plate is further provided with a positioning hole, and the outer flange ring is provided with a positioning column aligned with the positioning hole, and the positioning column can be inserted into the positioning hole to limit the ring plate and the outer flange ring.
[0015] The beneficial effect of the above technical solution is that the ring plate and the clamping ring can be quickly aligned and assembled.
[0016] The connecting screw holes, connecting bolts and connecting holes described in the above technical solution are all provided in multiple numbers and correspond one to one.
[0017] The beneficial effect of the above technical solution is that the stability of the connection between the rotating sleeve and the rear axle housing is better.
[0018] In the above technical solution, one end of the PTO input shaft located in the rear axle housing is a frustoconical enlarged portion, and the thin end of the enlarged portion faces the first bearing and abuts against the inner ring of the first bearing.
[0019] The beneficial effect of the above technical solution is that the axial runout of the PTO input shaft is also limited by the first bearing, which makes the stability of the entire wet PTO assembly better.
[0020] In the above technical solution, a ring-shaped convex ring is coaxially provided on the side of the outer flange ring close to the ring plate, and a ring groove coaxially provided on the side of the ring plate close to the retaining ring to cooperate with the convex ring. When the ring plate and the retaining ring are fitted together, the convex ring is embedded in the ring groove.
[0021] The beneficial effect of the above technical solution is that when the ring plate and the retaining ring are fitted together, the convex ring can be inserted into the ring groove, so that the retaining ring and the ring plate are better fitted.
[0022] A second object of the utility model is to provide a tractor with a simple structure and good stability during operation.
[0023] In order to achieve the above-mentioned purpose, another technical solution of the utility model is as follows: a tractor comprises the wet PTO assembly as described above.
[0024] The beneficial effects of the above technical solution are: it has a simple structure and good stability during operation, and at the same time, the PTO input shaft of the wet PTO assembly will not generate noise due to chassis vibration. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of a wet PTO assembly in the prior art;
[0026] Figure 2 This is a vertical view of the wet PTO assembly described in Example 1 of the utility model;
[0027] Figure 3 It is a cross-sectional view of the wet PTO assembly described in Example 1 of the utility model;
[0028] Figure 4 for Figure 3 Schematic diagram of the structure of the part;
[0029] Figure 5 It is a cross-sectional view of the rotating sleeve and the first bearing in the assembled state in Embodiment 1 of the utility model;
[0030] Figure 6 This is a simplified structural diagram of the ring plate and the retaining ring described in Example 1 of the utility model.
[0031] In the figure: 1. wet PTO body; 11. PTO housing; 12. PTO input shaft; 121. expansion part; 13. PTO output shaft; 2. oil distribution seat; 3. second bearing; 4. rotating sleeve; 41. ring plate; 411. second sub-connecting hole; 412. positioning hole; 413. ring groove; 42. retaining ring; 421. outer flange ring; 4211. first sub-connecting hole; 4212. positioning column; 4213. convex ring; 422. inner flange ring; 5. first bearing; 6. connecting bolt; 7. rear axle housing; 71. connecting screw hole. DETAILED DESCRIPTION
[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.
[0033] Example 1
[0034] like Figure 2 As shown, this embodiment provides a wet PTO assembly, including a wet PTO body 1, an oil distribution seat 2 and a rear axle housing 7, the wet PTO body 1 is placed in the rear axle housing 7, and the wet PTO body 1 includes a PTO housing 11, a PTO input shaft 12 and a PTO output shaft 13, the PTO output shaft 13 and the PTO output shaft 13 are coaxially distributed relative to the PTO housing 11, and respectively pass through the two ends of the PTO housing 11 (the assembly relationship between the PTO housing 11, the PTO input shaft 12 and the PTO output shaft 13 belongs to the prior art and is not repeated here), the oil distribution seat 2 is sleeved on the PTO output shaft 13, the oil distribution seat 2 is installed on the rear axle housing 7, and the PTO output shaft 13 It penetrates the rear end of the oil distribution seat 2 and the rear axle housing 7, and is rotatably connected to the oil distribution seat 2 and the rear axle housing 7 through the second bearing 3. The front end of the rear axle housing 7 is open, and the PTO input shaft penetrates the open part of the front end of the rear axle housing, and also includes a rotating sleeve 4. The rotating sleeve 4 is coaxially rotatably sleeved on the PTO input shaft 12 and is located outside the PTO housing 11. The rotating sleeve 4 is installed at the open part of the front end of the rear axle housing 7 and is connected to the rear axle housing. By adding a rotating sleeve coaxially rotatably connected to the PTO input shaft, and the rotating sleeve is connected to the front end of the rear axle housing, the PTO input shaft can also be supported, so that the stability of the PTO input shaft relative to the PTO housing is improved, and no vibration or noise occurs.
[0035] like Figure 3-Figure 5 As shown, the above technical solution also includes a first bearing 5, which is coaxially installed between the rotating sleeve 4 and the PTO input shaft 12. The PTO input shaft 12 is rotatably connected to the rotating sleeve 4 through the first bearing 5, so that the rotational connection effect between the rotating sleeve and the PTO input shaft is better.
[0036] like Figure 4 and Figure 5 As shown, in the above technical solution, an annular embedding groove is coaxially recessed on the inner wall of the rotating sleeve 4, and the outer ring of the first bearing 5 is embedded in the embedding groove, so that the first bearing is installed more stably in the rotating sleeve.
[0037] like Figure 2-Figure 4 As shown, the above technical solution also includes a connecting bolt 6, the outer edge of the rotating sleeve 4 is provided with a connecting hole that penetrates axially, and the edge of the corresponding end of the rear axle housing is axially recessed with a connecting screw hole aligned with the connecting hole, the rotating sleeve is abutted against the front end of the rear axle housing, and covers the open part of the front end of the rear axle housing, the connecting bolt 6 passes through the connecting hole, and is threadedly connected with the connecting screw hole 71 to fasten the rotating sleeve 4 to the rear axle housing 7, so that the rotating sleeve is connected to the connecting screw hole at the front end of the rear axle housing through the connecting bolt, which makes the installation of the rotating sleeve more convenient.
[0038] like Figure 4-Figure 6 As shown, in the above technical solution, the rotating sleeve 4 includes a ring plate 41 and a retaining ring 42, the ring cylinder of the retaining ring 42 is provided with an inner flange ring 422 at one end, and an outer flange ring 421 at the other end, the inner diameter of the ring plate 41 is smaller than the outer diameter of the inner flange ring 422 (preferably, the inner diameter of the ring plate is consistent with the inner diameter of the inner flange ring), the outer diameter of the ring plate 41 is consistent with the outer diameter of the outer flange ring 421, the ring plate 41 and the outer flange ring 421 are attached to each other and coaxially distributed, and the inner sides therebetween are enclosed to form the embedding groove, the outer flange ring 421 is provided with a first sub-connecting hole 4211, and the ring plate 41 is annularly provided with a second sub-connecting hole 411, the first sub-connecting hole 4211 and the second sub-connecting hole 411 are aligned with each other and jointly constitute the connecting hole, and the embedding groove is formed by the ring plate and the retaining ring together, so that the installation of the first bearing on the rotating sleeve is more convenient.
[0039] like Figure 5 and Figure 6As shown, in the above technical solution, a positioning hole 412 is also provided on the edge of the ring plate 41, and a positioning column 4212 aligned with the positioning hole 412 is protruded on the outer flange ring 421, and the positioning column 4212 can be inserted into the positioning hole 412 to limit the ring plate 41 and the outer flange ring 421, so that the ring plate and the clamping ring can be quickly aligned and assembled.
[0040] like Figure 4 As shown, in the above technical solution, one end of the PTO input shaft 12 located in the rear axle housing 7 is a frustoconical expansion portion 121, and the thin end of the expansion portion faces the first bearing and abuts against the inner ring of the first bearing, so that the axial runout of the PTO input shaft is also limited by the first bearing, which makes the stability of the entire wet PTO assembly better (the expansion portion can be frustoconical, with its thick end close to the PTO housing, and its thin end can extend through the inner hole of the ring plate to abut against the inner ring of the first bearing).
[0041] like Figure 4 and Figure 5 As shown, in the above technical solution, an annular convex ring 4213 is coaxially convexly provided on the side of the outer flange ring 421 close to the ring plate 41, and an annular groove 413 cooperating with the convex ring 4213 is coaxially recessed on the side of the ring plate 41 close to the retaining ring 42. When the ring plate 41 and the retaining ring 42 are fitted together, the convex ring 4213 is embedded in the annular groove 413, so that when the ring plate and the retaining ring are fitted together, the convex ring can be inserted into the annular groove, which makes the fit between the retaining ring and the ring plate better.
[0042] Preferably, the connecting screw holes, connecting bolts and connecting holes in the above technical solution are provided in multiple and one-to-one correspondence, so that the stability of the connection between the rotating sleeve and the rear axle housing is better (the multiple connecting screw holes are arranged at annular intervals on the edge of the front end opening of the rear axle housing, and the multiple connecting holes are arranged at annular intervals on the edge of the rotating sleeve, and the corresponding connecting screw holes and connecting holes are aligned with each other, and a connecting bolt is inserted to be threadedly connected to the connecting screw hole, so that the rotating sleeve is fixedly installed on the front end of the rear axle housing).
[0043] Specifically, Figure 6As shown, in this embodiment, the connecting screw hole, the connecting hole and the connecting bolt can be respectively provided with four, specifically, the four connecting screw holes are distributed in a rectangular shape at the front end opening of the rear axle housing (and the opening of the rear axle housing can be located between the four connecting screw holes); in this embodiment, the positioning posts and the positioning holes can be each provided with two and one-to-one correspondence, the two positioning posts are on the outer flange ring, and the two positioning posts are radially distributed on the outer flange ring, and the two positioning holes are on the ring plate and aligned with the corresponding positioning posts, wherein, Figure 6 The positioning holes and positioning columns connected by the dotted line are aligned with each other.
[0044] See Figure 3 In this embodiment, two second bearings are provided, and the two second bearings are axially spaced apart on the PTO output shaft, and the outer ring of the second bearing located in the front is also overlapped on the oil distribution seat, so that the oil distribution seat and the rear axle housing share the second bearing located in the front and are rotatably connected to the PTO output shaft, while the second bearing located in the rear is only for the rear axle housing and the PTO output shaft to be rotatably connected.
[0045] Example 2
[0046] This embodiment provides a tractor, including the wet PTO assembly as described in Embodiment 1, which has a simple structure and good stability during operation. At the same time, the PTO input shaft of the wet PTO assembly will not generate noise due to chassis vibration.
[0047] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.
Claims
1. A wet PTO assembly, comprising a wet PTO body (1), an oil distribution seat (2) and a rear axle housing (7), wherein the wet PTO body (1) is disposed in the rear axle housing (7), and the wet PTO body (1) has a PTO input shaft (12) and a PTO output shaft (13) which are coaxially distributed, the oil distribution seat (2) being sleeved on the PTO output shaft (13), the oil distribution seat (2) being mounted on the rear axle housing (7), and the PTO output shaft (13) passing through the rear ends of the oil distribution seat (2) and the rear axle housing (7), and being rotatably connected to the oil distribution seat (2) and the rear axle housing (7) through a second bearing (3), the front end of the rear axle housing (7) being open, and the PTO input shaft (12) passing through the open portion of the front end of the rear axle housing (7), characterized in that: It also comprises a rotating sleeve (4), which is coaxially rotatable on the PTO input shaft (12) and is located outside the rear axle housing (7). The rotating sleeve (4) is installed at the open front end of the rear axle housing (7) and is connected to the rear axle housing (7).
2. The wet PTO assembly according to claim 1, characterized in that: It also comprises a first bearing (5), wherein the first bearing (5) is coaxially mounted between the rotating sleeve (4) and the PTO input shaft (12), and the PTO input shaft (12) is rotatably connected to the rotating sleeve (4) via the first bearing (5).
3. The wet PTO assembly according to claim 2, characterized in that: An annular embedding groove is coaxially recessed on the inner wall of the rotating sleeve (4), and the outer ring of the first bearing (5) is embedded in the embedding groove.
4. The wet PTO assembly according to claim 3, characterized in that: The invention also comprises a connecting bolt (6); the outer edge of the rotating sleeve (4) is provided with a connecting hole penetrating along the axial direction; the edge of the corresponding end of the rear axle housing (7) is provided with a connecting screw hole (71) aligned with the connecting hole along the axial direction; the rotating sleeve (4) abuts against the front end of the rear axle housing (7) and covers the open part of the front end of the rear axle housing (7); the connecting bolt (6) passes through the connecting hole and is threadedly connected with the connecting screw hole (71) to fasten the rotating sleeve (4) to the rear axle housing (7).
5. The wet PTO assembly according to claim 4, characterized in that: The rotating sleeve (4) comprises a ring plate (41) and a snap ring (42); the ring cylinder of the snap ring (42) is provided with an inner flange ring (422) at one end and an outer flange ring (421) at the other end; the inner diameter of the ring plate (41) is smaller than the outer diameter of the inner flange ring (422); the outer diameter of the ring plate (41) is consistent with the outer diameter of the outer flange ring (421); the ring plate (41) and the outer flange ring (421) are attached to each other and coaxially distributed, and the inner sides thereof are enclosed to form the embedding groove; the outer flange ring (421) is provided with a first sub-connecting hole (4211); the ring plate (41) is provided with a second sub-connecting hole (411) in an annular direction; the first sub-connecting hole (4211) and the second sub-connecting hole (411) are aligned with each other and together constitute the connecting hole.
6. The wet PTO assembly according to claim 5, characterized in that: The edge of the ring plate (41) is also provided with a positioning hole (412), and the outer flange ring (421) is provided with a positioning column (4212) aligned with the positioning hole (412), and the positioning column (4212) can be inserted into the positioning hole (412) to limit the ring plate (41) and the outer flange ring (421).
7. The wet PTO assembly according to claim 6, characterized in that: The connecting screw holes (71), the connecting bolts (6) and the connecting holes are all provided in plurality and correspond one to one.
8. The wet PTO assembly according to any one of claims 4 to 7, characterized in that: One end of the PTO input shaft (12) located in the rear axle housing (7) is a frustoconical bulge (121), and the thin end of the bulge (121) faces the first bearing (5) and abuts against the inner ring of the first bearing (5).
9. The wet PTO assembly according to any one of claims 5 to 7, characterized in that: An annular convex ring (4213) is coaxially provided on the side of the outer flange ring (421) close to the ring plate (41), and an annular groove (413) cooperating with the convex ring (4213) is coaxially provided on the side of the ring plate (41) close to the retaining ring (42). When the ring plate (41) and the retaining ring (42) are fitted together, the convex ring (4213) is embedded in the annular groove (413).
10. A tractor, characterized in that: Comprising a wet PTO assembly as described in any one of claims 1-9.