Stepless change wheel and agricultural harvester

Abstract

The utility model relates to the technical field of agricultural machinery equipment, in particular to a stepless speed change wheel and an agricultural harvester. The inner spline shaft sleeve is arranged on one side of the end cover; a hub; the movable disc is movably arranged on the hub; the connecting piece penetrates through the inner spline shaft sleeve and the end cover, and the connecting piece is connected with the hub; the fixed disc is arranged on the side, away from the end cover, of the movable disc, and the movable disc can be close to or away from the fixed disc. According to the stepless speed change wheel, a traditional integrated structure of the inner spline shaft sleeve and the end cover is adjusted into a split structure, the inner spline shaft sleeve, the end cover and other components are connected through the connecting piece, the inner spline shaft sleeve and the end cover are independently arranged, the stress condition of the inner spline shaft sleeve is changed, and the damage probability of the inner spline shaft sleeve and the end cover is reduced; therefore, the stability and the reliability of the stepless speed change wheel are improved, the failure rate of the stepless speed change wheel is reduced, and the working time of the stepless speed change wheel is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural machinery equipment, and particularly relates to a continuously variable transmission wheel and an agricultural harvester. Background Art

[0002] Under the traditional small-scale peasant economy farming mode in our country, the planting of crops has the characteristics of mixed varieties, discrete distribution of plots, and small single-plot area. Against this background, various small and medium-sized, single-function harvesting machinery products have emerged in our country, greatly improving the harvesting efficiency of farmers and also providing technical accumulation for the research and development of domestic harvesting machinery. At present, cultivated land has begun to show large-scale and standardization, farmers' crop planting and harvesting are more professional, the demand for mid- to high-end harvesting machinery in the agricultural machinery market has emerged, and agricultural machinery operators have begun to pursue large harvesting machinery with large feeding volume, fast operation speed, comfort and reliability. At the same time, with the improvement of the service awareness of agricultural machinery operators and the cost awareness of farmers, the market has put forward higher requirements for the product performance of large harvesting machinery. As a key structure in agricultural machinery models, the design of continuously variable transmission wheels is relatively mature. The end covers of existing continuously variable transmission wheels are usually integrally cast. Affected by the material and force conditions, the end splines have defects such as poor reliability and high failure rate, which lead to problems such as complex structure and poor reliability of the continuously variable transmission wheels, and require frequent maintenance, affecting the operation efficiency. Utility Model Content

[0003] The purpose of the present application is to provide a continuously variable transmission wheel and an agricultural harvester, so as to solve to a certain extent the technical problem in the existing technology that the splines on the end cover of the existing agricultural machinery continuously variable transmission wheel are easily damaged, resulting in poor reliability and high failure rate of the continuously variable transmission wheel, requiring frequent maintenance and affecting the operation efficiency.

[0004] The present application provides a continuously variable transmission wheel, including: an end cover;

[0005] An internal spline shaft sleeve, which is arranged on one side of the end cover;

[0006] A hub;

[0007] A moving disk, which is movably arranged on the hub;

[0008] A connecting piece, which passes through the internal spline shaft sleeve and the end cover, and the connecting piece is connected to the hub;

[0009] A fixed disk, which is arranged on the side of the moving disk away from the end cover, and the moving disk can approach or move away from the fixed disk.

[0010] In the above technical solution, further, the hub is provided with a shaft cylinder part;

[0011] The end cover includes a first main body portion which is disposed around the shaft cylinder portion;

[0012] The moving disk includes a first central portion which is sleeved on the shaft cylinder portion;

[0013] The hub is connected to the fixed disk; the connecting member passes through the internal spline shaft sleeve and the end cover and then is connected to the shaft cylinder portion.

[0014] In any of the above technical solutions, further, the stepless speed change pulley further includes an elastic member. The moving disk is provided with an installation cavity, the elastic member is disposed in the installation cavity, and the elastic member abuts against both the end cover and the moving disk simultaneously.

[0015] In any of the above technical solutions, further, the stepless speed change pulley further includes a first cam and a second cam; the first cam and the second cam are respectively arranged axially along the shaft cylinder portion in the installation cavity; the first cam is connected to the end cover, and the second cam is connected to the moving disk;

[0016] The first cam, the second cam and a partial wall surface of the moving disk jointly define a limiting space, and the elastic member is disposed in the limiting space.

[0017] In any of the above technical solutions, further, the moving disk is provided with an oil passage, the shaft cylinder portion is provided with a communication portion, and the oil passage is communicated with the communication portion.

[0018] In any of the above technical solutions, further, the moving disk is provided with a threaded groove, the length of the threaded groove extends axially along the moving disk, the threaded groove is communicated with the oil passage, and the threaded groove is also communicated with the gap between the shaft cylinder portion and the moving disk.

[0019] In any of the above technical solutions, further, the number of the connecting members is multiple, the multiple connecting members are arranged at intervals, the internal spline shaft sleeve is provided with multiple through holes, the end cover is provided with multiple connecting holes, each connecting hole is arranged opposite to one through hole, and each connecting member correspondingly passes through a set of the through holes and the connecting holes;

[0020] In any of the above technical solutions, further, the connecting member is a locking bolt.

[0021] In any of the above technical solutions, further, the stepless speed change pulley further includes:

[0022] A first sealing member which is disposed between the moving disk and the first main body portion;

[0023] A second seal, which is arranged between the first central part and the shaft cylinder part;

[0024] A third seal, which is arranged on the shaft cylinder part;

[0025] A fourth seal, which is arranged between the shaft cylinder part and the first central part, and the fourth seal is arranged at an interval from the second seal.

[0026] The present application also provides an agricultural harvester, including the continuously variable transmission wheel described in any of the above technical solutions. Therefore, it has all the beneficial technical effects of this continuously variable transmission wheel, and will not be elaborated here.

[0027] In the above technical solution, further, the agricultural harvester further includes a driving wheel, and the driving wheel is in transmission connection with the continuously variable transmission wheel.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows:

[0029] The continuously variable transmission wheel provided by the present application includes: an end cover; an internal spline shaft sleeve, which is arranged on one side of the end cover; a hub; a moving disk, which is movably arranged on the hub; a connecting piece, which penetrates through the internal spline shaft sleeve and the end cover, and the connecting piece is connected to the hub; a fixed disk, which is arranged on the side of the moving disk away from the end cover, and the moving disk can approach or move away from the fixed disk.

[0030] For the continuously variable transmission wheel provided by the present application, the integral structure of the traditional internal spline shaft sleeve and the end cover is adjusted to a split structure, and a connecting piece is used to connect the internal spline shaft sleeve, the end cover and other components. The internal spline shaft sleeve and the end cover are independently arranged, the stress condition of the internal spline shaft sleeve is changed, the probability of damage to the internal spline shaft sleeve and the end cover is reduced, thereby improving the stability and reliability of this continuously variable transmission wheel, reducing the failure rate of this continuously variable transmission wheel, and prolonging the working duration of this continuously variable transmission wheel.

[0031] The agricultural harvester provided by the present application includes the continuously variable transmission wheel described above. Therefore, through this continuously variable transmission wheel, not only can speed change be realized, but also the stability of the working process of this agricultural harvester is improved, the failure rate is reduced, the shutdown maintenance frequency of this agricultural harvester is reduced, thereby ensuring the production efficiency of this agricultural harvester. Description of the Drawings

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 The structural schematic diagram of the continuously variable pulley provided by the embodiment of the present application;

[0034] Figure 2 is Figure 1 the sectional view along A-A.

[0035] Reference numerals:

[0036] 1 - end cover, 101 - first main body part, 102 - first connecting part, 2 - internal spline bushing, 201 - second main body part, 202 - second connecting part, 3 - connecting piece, 4 - moving disk, 401 - first central part, 402 - first disk edge part, 403 - convex part, 5 - fixed disk, 501 - second central part, 502 - second disk edge part, 503 - avoiding part, 6 - hub, 601 - shaft cylinder part, 602 - communicating part, 7 - oil passage, 8 - elastic member, 9 - first cam, 10 - second cam, 11 - first seal, 12 - second seal, 13 - third seal, 14 - fourth seal. Detailed implementation manners

[0037] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.

[0038] Generally, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but merely represents the selected embodiments of the present application.

[0039] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application 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 of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] The following refers to Figure 1 and Figure 2 describe the continuously variable pulley and the agricultural harvester described in the embodiments of the present application.

[0043] See Figure 1 and Figure 2 As shown, the embodiments of the present application provide a continuously variable pulley. The continuously variable pulley includes an end cover 1, an internal spline shaft sleeve 2, a moving disk 4, a fixed disk 5, and a connecting member 3. Among them, the end cover 1 and the internal spline shaft sleeve 2 are designed separately, and the two are connected by the connecting member 3. Preferably, the internal spline shaft sleeve 2 is a forging, and the material is selected as forged steel, which significantly improves the structural strength and connection strength of the end cover 1 and the internal spline shaft sleeve 2. The end cover 1 can be a casting or a forging. The fixed disk 5 is movably connected to the moving disk 4. The fixed disk 5 remains stationary, and the moving disk 4 can move relative to the fixed disk 5. The connecting member 3 passes through the internal spline shaft sleeve 2 and the end cover 1 to connect the two. The internal spline shaft sleeve 2 and the end cover 1 are connected to the hub 6 by the connecting member 3, so that the internal spline shaft sleeve 2 and the end cover 1 remain stationary with the fixed disk 5, while the moving disk 4 can approach or move away from the fixed disk 5, so as to realize continuously variable speed of the continuously variable pulley.

[0044] Specifically, the end cover 1 includes a first main body portion 101 and a first connecting portion 102. The first main body portion 101 and the first connecting portion 102 have an integral structure. The diameter of the first main body portion 101 is larger than the diameter of the first connecting portion 102. The first main body portion 101 and the first connecting portion 102 together form a hollow shell structure inside. The first connecting portion 102 is provided with a connection hole for passing through the connecting member 3. Preferably, in this embodiment, the number of the connecting members 3 is multiple. Correspondingly, the number of the connection holes is also multiple. The number of the connection holes is the same as the number of the connecting members 3 and corresponds one by one. Each connection hole corresponds to passing through a connecting member 3. Preferably, the number of the connecting members 3 in this embodiment is 8. More preferably, the connecting member 3 is a locking bolt with a model of M10. Compared with the bolts used in general continuously variable pulleys, the specification and quantity are increased, thereby improving the connection strength.

[0045] Further, the internal spline shaft sleeve 2 includes a second main body portion 201 and a second connecting portion 202. Among them, the outer shape of the second main body portion 201 is columnar, the diameter of the second main body portion 201 is smaller than the shape of the first connecting portion 102, and a part of the second main body portion 201 passes through the first connecting portion 102 and is disposed inside the end cover 1; the second connecting portion 202 is disposed on the part of the second main body portion 201 located outside the end cover 1. The second connecting portion 202 is annular, and the second connecting portion 202 is coaxially disposed with the second main body portion 201 along the circumferential direction of the second main body portion 201. Preferably, the second connecting portion 202 and the second main body portion 201 have an integral structure. The second connecting portion 202 is provided with a plurality of through holes, the number of through holes is the same as the number of connecting holes and they are arranged in one-to-one correspondence, and each through hole is disposed opposite to a connecting hole so that the connecting member 3 can penetrate through a group of through holes and connecting holes.

[0046] Further, the moving disk 4 includes a first central portion 401 and a first disk edge portion 402. The first central portion 401 is formed with a first through channel, the first through channel is coaxially disposed with the end cover 1, and the first central portion 401 is disposed around the first main body portion 101 along the circumferential direction of the first main body portion 101.

[0047] The first disk edge portion 402 is provided with a convex portion 403. The first central portion 401 and the first disk edge portion 402 have an integral structure. The convex portion 403 protrudes towards the fixed disk 5 relative to the first disk edge portion 402, and the first disk edge portion 402 is disposed around the first central portion 401 along the circumferential direction of the first central portion 401.

[0048] Further, the fixed disk 5 includes a second central portion 501 and a second disk edge portion 502. Among them, the second central portion 501 is provided with an avoidance portion 503, the shape of the avoidance portion 503 is adapted to the shape of the convex portion 403. When the moving disk 4 approaches the fixed disk 5, the convex portion 403 can enter the avoidance portion 503. When the moving disk 4 moves away from the fixed disk 5, the convex portion 403 moves out of the avoidance portion 503. The second central portion 501 is provided with a second through channel, and the second through channel is coaxially disposed with the first through channel. The second disk edge portion 502 and the second central portion 501 have an integral structure, and the second disk edge portion 502 and the first disk edge portion 402 are disposed facing each other.

[0049] Further, this continuously variable pulley further includes a hub 6, which is connected to the second central portion 501. The connection method can be, but is not limited to, connection using bolts or other forms of fasteners. The hub 6 is provided with a shaft cylinder portion 601, and the shaft cylinder portion 601 is inserted into the second insertion channel. The shaft cylinder portion 601 is coaxially arranged with the second insertion channel. When the hub 6, the fixed disk 5, and the movable disk 4 are in an assembled state, a part of the length of the first central portion 401 surrounds the shaft cylinder portion 601. A threaded hole is provided on the end face of the shaft cylinder portion 601 facing the end cover 1. The connecting member 3 passes through the internal spline bushing 2 and the end cover 1 and then is connected to the threaded hole, thereby fixing the internal spline bushing 2, the end cover 1, and the shaft cylinder portion 601. There is no fixed connection relationship between the movable disk 4 and the end cover 1 and the fixed disk 5. Under the action of the belt sleeved between the movable disk 4 and the fixed disk 5, relative movement between the movable disk 4 and the fixed disk 5 can be achieved.

[0050] This continuously variable pulley further includes an elastic member 8. The first central portion 401, the first main body portion 101, and the convex portion 403 jointly enclose an installation cavity. The elastic member 8 is specifically a compression spring. The elastic member 8 is arranged around the first central portion 401 in the installation cavity and is coaxially arranged with the first central portion 401. One end of the elastic member 8 is used to abut against the convex portion 403, and the other end of the elastic member 8 is used to abut against the first main body portion 101, so that the elastic member 8 can apply an elastic force to the end cover 1 and the movable disk 4 in the moving direction of the movable disk 4, thereby playing a buffering role between the two.

[0051] Further, this continuously variable pulley further includes a first cam 9 and a second cam 10, which are used in combination. In the assembled state, the first cam 9 and the second cam 10 are buckled with each other. A first clamping portion is provided at the junction between the first main body portion 101 and the first connecting portion 102. The first cam 9 is arranged at the first clamping portion in the installation cavity. Preferably, the first cam 9 is connected to the end cover 1, and the connection method can be pin connection.

[0052] The convex portion 403 is provided with a second clamping portion. The second cam 10 is arranged at the second clamping portion in the installation cavity. The second cam 10 is connected to the convex portion 403, and the connection method can be threaded connection. It should be noted that the elastic member 8 is arranged between the first cam 9, the second cam 10, and the first central portion 401. The first cam 9 and the second cam 10 can limit the elastic member 8. At the same time, it can also enhance the stability between the movable disk 4 and other components during the overall rotation of this continuously variable pulley.

[0053] Further, the moving disk 4 is provided with an oil passage 7, which is specifically a hole structure provided on the first central part 401. Before assembling this continuously variable pulley, the oil passage 7 is pre-filled with lubricating oil, and the lubricating oil can specifically be grease. The shaft cylinder part 601 of the hub 6 is provided with a communicating part 602, and the communicating part 602 can communicate with the oil passage 7, so that the lubricating oil can flow between the first central part 401 and the shaft cylinder part 601, thereby playing a lubricating role.

[0054] Furthermore, the moving disk 4 is provided with a threaded groove, which communicates with the oil passage 7, and the length direction of the threaded groove extends along the axial direction of the first central part 401. Preferably, in Figure 2 the state shown, the length of the threaded groove extends leftward along the axial direction of the first central part 401, and the threaded groove communicates with the gap between the first central part 401 and the shaft cylinder part 601, so that part of the lubricating oil can enter the gap between the first central part 401 and the shaft cylinder part 601 through the threaded groove, increasing the lubrication range.

[0055] Further, this continuously variable pulley further includes a first seal 11, a second seal 12, a third seal 13 and a fourth seal 14, and all four seals are sealing rings. Among them, the first seal 11 is sleeved on the first main body part 101, and the first seal 11 is located between the convex part 403 and the first main body part 101; the second seal 12 is sleeved on the shaft cylinder part 601, and the second seal 12 is located between the convex part 403 and the shaft cylinder part 601; the shaft cylinder part 601 is in a cylindrical shape and is hollow inside, and the third seal 13 is arranged on the inner wall surface of the shaft cylinder part 601 and is located at the boundary position between the shaft cylinder part 601 and the hub 6. After the drive shaft of the harvester for driving this continuously variable pulley is inserted and installed in the shaft cylinder part 601, the third seal 13 can play a sealing role between the shaft cylinder part 601 and the drive shaft; the fourth seal 14 is sleeved on the shaft cylinder part 601 and is located between the first central part 401 and the shaft cylinder part 601, and the second seal 12 and the fourth seal 14 are axially spaced apart on both sides of the oil passage 7 along the shaft cylinder part 601. It can be seen that in this embodiment, by setting multiple-stage seals, the sealing performance of this continuously variable pulley is significantly improved, and the risk of oil leakage is reduced.

[0056] In summary, for the continuously variable pulley provided in this application, the internal spline shaft sleeve 2 and the end cover 1 are adjusted from the traditional integral structure to a split structure, and the connecting piece 3 is used to connect the internal spline shaft sleeve 2 with the end cover 1 and other components. The internal spline shaft sleeve 2 and the end cover 1 are independently arranged, changing the force condition of the internal spline shaft sleeve 2, reducing the probability of damage to the internal spline shaft sleeve 2 and the end cover 1, thereby improving the stability and reliability of this continuously variable pulley, reducing the failure rate of this continuously variable pulley, and prolonging the working duration of this continuously variable pulley.

[0057] An embodiment of the present application also provides an agricultural harvester, including the continuously variable speed wheel described in any of the above embodiments, and thus has all the beneficial technical effects of the continuously variable speed wheel, which will not be repeated here.

[0058] The agricultural harvester also includes a driving wheel, which is connected to the continuously variable speed wheel through a transmission member, so that after the driving wheel is started, the transmission member is driven to move, and the transmission member acts between the moving plate 4 and the fixed plate 5 of the continuously variable speed wheel, so that the two move relative to each other, thereby enabling the continuously variable speed wheel to change speed. Preferably, in this embodiment, the transmission member is specifically a belt.

[0059] To sum up, the agricultural harvester provided in the present application can not only achieve speed change through the above-mentioned continuously variable speed wheel, but also improve the stability of the working process of the agricultural harvester, reduce the failure rate, and reduce the frequency of shutdown and maintenance of the agricultural harvester, thereby ensuring the production efficiency of the agricultural harvester.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A continuously variable transmission wheel, characterized in that: include: End caps; An internal spline sleeve, the internal spline sleeve being arranged on one side of the end cover; Wheel hub; A moving plate, the moving plate being movably disposed on the wheel hub; A connecting piece, the connecting piece is passed through the internal spline sleeve and the end cover, and the connecting piece is connected to the wheel hub; The fixed plate is arranged on a side of the movable plate away from the end cover, and the movable plate can be close to or away from the fixed plate.

2. The continuously variable transmission wheel according to claim 1, characterized in that: The wheel hub is provided with a shaft cylinder portion; The end cover comprises a first main body portion, and the first main body portion is arranged around the shaft cylinder portion: The movable plate comprises a first central portion, and the first central portion is sleeved on the shaft cylinder portion; The wheel hub is connected to the fixed plate; the connecting piece is connected to the shaft cylinder portion after passing through the internal spline sleeve and the end cover.

3. The continuously variable transmission wheel according to claim 2, characterized in that: The continuously variable speed wheel further comprises an elastic component, the movable plate is provided with a mounting cavity, the elastic component is arranged in the mounting cavity, and the elastic component abuts against the end cover and the movable plate at the same time.

4. The continuously variable transmission wheel according to claim 3, characterized in that: The continuously variable transmission wheel further comprises a first cam and a second cam; the first cam and the second cam are respectively arranged in the mounting cavity along the axial direction of the shaft cylinder; the first cam is connected to the end cover, and the second cam is connected to the moving plate; The first cam, the second cam and a part of the wall surface of the movable plate jointly define a limiting space, and the elastic component is arranged in the limiting space.

5. The continuously variable transmission wheel according to claim 2, characterized in that: The movable plate is provided with an oil passage, the shaft cylinder portion is provided with a communicating portion, and the oil passage is communicated with the communicating portion.

6. The continuously variable transmission wheel according to claim 5, characterized in that: The movable plate is provided with a thread groove, the length of which extends along the axial direction of the movable plate, the thread groove is communicated with the oil passage, and the thread groove is also communicated with the gap between the shaft cylinder portion and the movable plate.

7. The continuously variable transmission wheel according to any one of claims 1 to 6, characterized in that: There are multiple connecting parts, and the multiple connecting parts are arranged at intervals. The internal spline sleeve is provided with multiple through holes, and the end cover is provided with multiple connecting holes. Each connecting hole is arranged opposite to a through hole, and each connecting part passes through a group of the through holes and the connecting hole.

8. The continuously variable transmission wheel according to any one of claims 1 to 6, characterized in that: The connecting piece is a locking bolt.

9. The continuously variable transmission wheel according to claim 2, characterized in that: The continuously variable speed wheel also includes: A first sealing member, wherein the first sealing member is disposed between the moving disk and the first main body; a second sealing member disposed between the first central portion and the shaft cylinder portion; a third sealing member, the third sealing member being arranged on the shaft cylinder portion; A fourth seal is disposed between the shaft tube portion and the first center portion, and the fourth seal is spaced apart from the second seal.

10. An agricultural harvester, characterized in that: A continuously variable transmission wheel comprising any one of claims 1 to 9; The agricultural harvester also includes a driving wheel, which is drivingly connected to the continuously variable speed wheel.

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