Nested universal coupling structure and waist twisting tractor

Abstract

The utility model relates to a nested universal coupling structure and a waist twisting tractor, which comprise a first universal coupling structure, a second universal coupling structure and a third universal coupling structure, the second universal coupling structure and the third universal coupling structure are hollow, and the first universal coupling structure is arranged inside the second universal coupling structure. The third universal coupling structure is arranged outside the second universal coupling structure, the two ends of the first universal coupling structure are connected with a first tractor clutch output shaft and a PTO input shaft respectively, and the two ends of the second universal coupling structure are connected with a second tractor clutch output shaft and a gearbox input shaft respectively. And two ends of the third universal coupling structure are respectively connected with the front axle driving shaft and the rear axle driving shaft. By arranging the three universal coupling structures and connecting the three universal coupling structures with the external shaft ends correspondingly, the function of multi-shaft input and multi-shaft output can be achieved, and the requirement for complex working conditions can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft rods, in particular to a nested universal coupling structure and a twisting waist tractor. Background Art

[0002] The main function of the universal coupling is to connect two shafts together. When the machine is running, the two shafts cannot be separated. The two shafts can only be separated after the machine stops and the connection is disassembled.

[0003] Couplings can be divided into rigid couplings and flexible couplings. Among them, universal couplings are flexible couplings that can transmit motion and torque with varying degrees of axial, angular compensation and radial.

[0004] The working principle of the universal coupling is based on its structure consisting of two interconnected sleeves and a rotating part in the middle. Most of these rotating parts are ball heads and ball seats, where the ball head is fixed on one shaft and the ball seat is fixed on the other shaft. When the two shafts are not in a straight line, these parts allow one shaft of the coupling to produce tilting and rotational movement relative to the other shaft.

[0005] However, most of the existing universal couplings are single-axis input and single-axis output structures, which cannot meet the working requirements of coaxial multiple inputs and multiple outputs and have certain limitations. Utility Model Content

[0006] In order to solve the above technical problems, the purpose of the utility model is to provide a multi-axis output structure of a universal coupling which has a simple structure and can realize multi-axis synchronous swing transmission while occupying a small space.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a nested universal coupling structure and a twist waist tractor, comprising a first universal coupling structure, a second universal coupling structure with a hollow interior, and a third universal coupling structure, wherein the first universal coupling structure is placed inside the second universal coupling structure, and the third universal coupling structure is arranged outside the second universal coupling structure, the two ends of the first universal coupling structure are respectively connected to the tractor clutch output shaft 1 and the PTO input shaft, the two ends of the second universal coupling structure are respectively connected to the tractor clutch output shaft 2 and the gearbox input shaft, and the two ends of the third universal coupling structure are respectively connected to the front axle drive shaft and the rear axle drive shaft.

[0008] The beneficial effect of the utility model is that by setting three universal coupling structures and connecting the three universal coupling structures to external shaft ends respectively, the functions of multi-axis input and multi-axis output can be met, and complex working conditions can be met.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the tractor clutch output shaft 2 and the gearbox input shaft are both hollow shafts, the tractor clutch output shaft 1 is located inside the tractor clutch output shaft 2, and the PTO input shaft is located inside the gearbox input shaft.

[0011] The above technical solution can be achieved by setting a hollow tractor clutch output shaft 2 and a gearbox input shaft, and setting the tractor clutch output shaft 1 and the PTO input shaft in the tractor clutch output shaft 2 and the gearbox input shaft respectively, so that the two can transmit torque normally while realizing multi-axis synchronous output.

[0012] Furthermore, the first universal coupling structure is a double cross-axis universal coupling.

[0013] The above technical solution utilizes the tractor clutch output shaft 1 and the PTO input shaft to be connected with the double cross shaft universal coupling, so that the tractor clutch output shaft 1 and the PTO input shaft can be deflected and adjusted in direction while transmitting torque.

[0014] Furthermore, the second universal coupling structure includes an annular joint body, two cup-shaped joint bodies and two annular cross shafts, both sides of the annular joint body are provided with paired connecting protrusions, both sides of the two cup-shaped joint bodies are provided with notches that are compatible with the paired connecting protrusions, the two annular cross shafts are arranged between the annular joint body and the two cup-shaped joint bodies, and are connected to the two, and the ends of the two cup-shaped joint bodies that are away from each other are respectively connected to the tractor clutch output shaft 2 and the gearbox input shaft.

[0015] The above technical solution is an improvement on the existing cross-axis universal joint. A through hole is provided inside the annular joint body for the first universal joint coupling structure to pass through, and the two cup-shaped joint bodies are movably connected by the annular joint body to transmit torque while achieving flexible swinging in multiple directions.

[0016] Furthermore, the annular cross shaft includes a connecting ring and four bosses arranged on the outer edge of the connecting ring and distributed at equal intervals, wherein two opposite bosses are rotatably connected to the paired connecting protrusions, and the other two opposite bosses are rotatably connected to the cup-shaped node.

[0017] The above technical solution utilizes a hollow annular cross shaft and connects it with two cup-shaped nodes, so that the two cup-shaped nodes can realize multi-directional flexible rotation under the connection of the annular cross shaft.

[0018] Furthermore, the third universal joint structure includes a telescopic portion and two universal joints, the two universal joints are respectively arranged at two ends of the telescopic portion, and ends of the two universal joints that are far away from each other are respectively connected to the front axle drive shaft and the rear axle drive shaft.

[0019] The above technical solution utilizes two universal joints and a telescopic part to form a third universal coupling structure. The telescopic part can transmit the torque between the front axle drive shaft and the rear axle drive shaft, and can be extended and retracted according to actual conditions to meet working conditions.

[0020] Furthermore, the telescopic part includes a telescopic rod and a telescopic sleeve, one end of the telescopic rod is coaxially sleeved in the telescopic sleeve and connected to the telescopic sleeve through a spline, the other end of the telescopic rod is connected to the front axle drive shaft through a universal joint, and the end of the telescopic sleeve away from the telescopic rod is connected to the rear axle drive shaft through a universal joint.

[0021] The above technical solution has a telescopic rod and a telescopic sleeve, and a spline is arranged between the telescopic rod and the telescopic sleeve, so that the telescopic rod and the telescopic sleeve can better transmit torque and can be telescoped along the extension direction of the two to meet complex working conditions.

[0022] The second purpose of the utility model is to provide a twisting tractor with a simple transmission structure.

[0023] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a twist waist tractor, including a universal coupling multi-axis output structure.

[0024] The above technical solution utilizes a multi-axis output structure of a universal coupling and assembles it in a twisting tractor to reduce the turning radius of the twisting tractor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the planar structure in an embodiment of the utility model;

[0026] Figure 2 This is a schematic structural diagram of a second universal coupling structure in an embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the ring cross-axis structure in the embodiment of the utility model.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. The first universal joint structure; 2. The second universal joint structure; 21. The annular joint body; 22. The cup-shaped joint body; 23. The annular cross shaft; 231. The connecting ring; 232. The boss; 3. The third universal joint structure; 31. The telescopic part; 311. The telescopic rod; 312. The telescopic sleeve; 32. The universal joint; 4. The tractor clutch output shaft 1; 5. The PTO input shaft; 6. The tractor clutch output shaft 2; 7. The gearbox input shaft; 8. The front axle drive shaft; 9. The rear axle drive shaft; 10. The pin. DETAILED DESCRIPTION

[0030] 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.

[0031] Example

[0032] like Figure 1-3 As shown, a nested universal coupling structure and a twist waist tractor include a first universal coupling structure 1, an internally hollow second universal coupling structure 2 and a third universal coupling structure 3, wherein the first universal coupling structure 1 is placed inside the second universal coupling structure 2, and the third universal coupling structure 3 is arranged outside the second universal coupling structure 2, the two ends of the first universal coupling structure 1 are respectively connected to the tractor clutch output shaft 1 4 and the PTO input shaft 5, the two ends of the second universal coupling structure 2 are respectively connected to the tractor clutch output shaft 2 6 and the gearbox input shaft 7, and the two ends of the third universal coupling structure 3 are respectively connected to the front axle drive shaft 8 and the rear axle drive shaft 9.

[0033] Among them, the tractor clutch output shaft 4 transmits power to the PTO input shaft 5 through the first universal coupling structure 1.

[0034] Among them, the tractor clutch output shaft 2 6 transmits power to the gearbox input shaft 7 through the second universal coupling structure 2.

[0035] The rear axle drive shaft 9 transmits power to the front axle drive shaft 8 through the third universal joint structure 3 .

[0036] The working principle is: when faced with working conditions that require multiple inputs and multiple outputs, the coaxially arranged first universal coupling structure 1 and the second universal coupling structure 2 are matched with the third universal coupling structure 3, so as to realize the functions of multi-end input and multi-end output, and the entire device can meet more complex working conditions.

[0037] The above technical solution can realize the functions of multi-end input and multi-end output by arranging a coaxial first universal coupling structure 1 and a second universal coupling structure 2 in combination with a third universal coupling structure 3.

[0038] Preferably, the tractor clutch output shaft 2 6 and the gearbox input shaft 7 are both hollow shafts, the tractor clutch output shaft 1 4 is located inside the tractor clutch output shaft 2 6 , and the PTO input shaft 5 is located inside the gearbox input shaft 7 .

[0039] The tractor clutch output shaft 1 4 is rotatably connected to the tractor clutch output shaft 2 6 via a rotating shaft.

[0040] The PTO input shaft 5 is rotatably connected to the transmission input shaft 7 via a rotating shaft.

[0041] The working principle is: when the structure is used to transmit torque, the tractor clutch output shaft 1 4 and the PTO input shaft 5 are respectively installed inside the tractor clutch output shaft 2 6 and the gearbox input shaft 7, and are rotated and connected inside them, so that the first universal coupling structure 1 can rotate inside the second universal coupling structure 2 and transmit torque.

[0042] The above technical solution can be achieved by setting a hollow tractor clutch output shaft 2 6 and a gearbox input shaft 7, and setting the tractor clutch output shaft 1 and the PTO input shaft in the tractor clutch output shaft 2 6 and the gearbox input shaft 7 respectively, so that the two can transmit torque normally while realizing multi-axis synchronous output.

[0043] Preferably, the first universal coupling structure 1 is a double cross-axis universal coupling.

[0044] Among them, Figure 1 As shown, the tractor clutch output shaft 4 is connected to the cross-axis universal joint on the left side of the double cross-axis universal coupling through a spline sleeve (this can achieve circumferential limit at the connection between the two, but the spline sleeve can provide a certain axial slip margin for the two), and the PTO input shaft 5 and the cross-axis universal joint on the right side of the double cross-axis universal coupling are sleeved with each other and embedded with a pin 10 for limiting (the pin 10 can limit the axial and circumferential displacement of the two) to meet the swing requirements of the twisting waist tractor.

[0045] The working principle is: when the tractor clutch output shaft 4 drives the PTO input shaft 5 to rotate, the two are connected by a double cross-axis universal coupling, so that they can deflect and swing according to the working conditions while transmitting torque, so that the device can change the power transmission direction when transmitting torque.

[0046] The above technical solution utilizes the tractor clutch output shaft 1 and the PTO input shaft to be connected with the double cross shaft universal coupling, so that the tractor clutch output shaft 1 and the PTO input shaft can be deflected and adjusted in direction while transmitting torque.

[0047] Preferably, the second universal coupling structure 2 includes an annular joint body 21, two cup-shaped joint bodies 22 and two annular cross shafts 23. Pairs of connecting protrusions are provided on both sides of the annular joint body 21, and notches matching the pairs of connecting protrusions are provided on both sides of the two cup-shaped joint bodies 22. The two annular cross shafts 23 are arranged between the annular joint body 21 and the two cup-shaped joint bodies 22 and connected to the two. The ends of the two cup-shaped joint bodies 22 that are away from each other are respectively connected to the tractor clutch output shaft 2 6 and the gearbox input shaft 7.

[0048] Among them, the connection method between the tractor clutch output shaft 2 6 and the gearbox input shaft 7 and the two cup-shaped joints 22 is similar to the connection method and effect between the tractor clutch output shaft 1 4 and the PTO input shaft 5 and the first universal coupling structure 1. The tractor clutch output shaft 2 6 and a cup-shaped joint 22 connected thereto are splined (this can achieve circumferential limitation at the connection between the two, but the spline connection can provide a certain axial slip margin for the two). The gearbox input shaft 7 and the other cup-shaped joint 22 connected thereto are sleeved and embedded with pins 10 for limitation (the pin 10 can limit the axial and circumferential displacement of the two) to meet the swing requirements of the twisting waist tractor.

[0049] The working principle is as follows: by setting a tractor clutch output shaft 2 6 and a gearbox input shaft 7 which are sleeved on the outside of the tractor clutch output shaft 1 4 and the PTO input shaft 5, the function of outputting power synchronously with the first universal joint structure 1 is realized. At the same time, by using the hollow universal joint structure 4, when it is necessary to deflect the power output direction according to the working conditions, the tractor clutch output shaft 2 6 and the gearbox input shaft 7 drive the cup-shaped joint body 22 connected to the two to deflect, and the two cup-shaped joint bodies 22 cooperate with the annular cross shaft 23 and the annular joint body 21 to realize multi-directional deflection rotation, thereby realizing the purpose of angular deflection in multiple directions between the tractor clutch output shaft 2 6 and the gearbox input shaft 7 while transmitting torque.

[0050] The above technical solution is to set up an annular joint body 21, two cup-shaped joint bodies 22 and two annular cross shafts 23, and utilize them to realize the angle deflection and torque transmission of the tractor clutch output shaft 2 6 and the gearbox input shaft 7.

[0051] Preferably, the annular cross shaft 23 includes a connecting ring 231 and four bosses 232 arranged on the outer edge of the connecting ring and distributed at equal intervals, wherein two opposite bosses 232 are rotationally connected to the paired connecting protrusions, and the other two opposite bosses 232 are rotationally connected to the cup-shaped section 22.

[0052] The working principle is: when the two cup-shaped joints 22 rotate in multiple directions on both sides of the annular joint 21, the two opposite bosses 232 on the outside of the cup-shaped joint 22 rotate at the connecting protrusion, thereby achieving an angle deflection in one direction, and the other two opposite bosses 232 on the outside of the cup-shaped joint 22 rotate at the cup-shaped joint 21, thereby achieving an angle deflection in another direction.

[0053] The above technical solution can be achieved by setting four bosses 232 and dividing the four bosses 232 into two opposite groups, the two groups of bosses are rotatably connected to the cup-shaped node 22 and the connecting protrusion respectively, thereby realizing multi-angle deflection between the annular node 21 and the two cup-shaped nodes 22.

[0054] Preferably, the third universal coupling structure 3 includes a telescopic portion 31 and two universal joints 32 , the two universal joints 32 are respectively arranged at two ends of the telescopic portion 31 , and ends of the two universal joints 32 that are away from each other are respectively connected to the front axle drive shaft 8 and the rear axle drive shaft 9 .

[0055] The working principle is: when the rear axle drive shaft 9 rotates, the rear axle drive shaft 9 transmits power to the telescopic part, and the telescopic part can be telescoped during rotation according to actual conditions, and then transmitted to the front axle drive shaft 8, so that the rear axle drive shaft 9 and the front axle drive shaft 8 can be telescoped at the same time during the torque transmission process.

[0056] The above technical solution realizes that the device can transmit torque power and perform extension and retraction at the same time by providing an extension portion that extends and retracts along the length direction of the rear axle drive shaft 9 and the front axle drive shaft 8 .

[0057] Preferably, the telescopic part 31 includes a telescopic rod 311 and a telescopic sleeve 312, one end of the telescopic rod 311 is coaxially sleeved in the telescopic sleeve 312 and connected thereto by a spline, the other end of the telescopic rod 311 is connected to the front axle drive shaft 8 by a universal joint 32, and the end of the telescopic sleeve 312 away from the telescopic rod 311 is connected to the rear axle drive shaft 9 by a universal joint 32.

[0058] The working principle is: when the telescopic part transmits torque and retracts, the telescopic rod 311 can transmit power to the telescopic sleeve 312 through the spline, and the telescopic rod 311 can freely retract in the telescopic sleeve, so that the entire coupling can transmit torque and retract.

[0059] The above technical solution utilizes the spline to enable the telescopic rod 311 to be telescopic inside the telescopic sleeve 312 while transmitting torque.

[0060] Preferably, a twist waist tractor comprises a universal coupling multi-axis output structure.

[0061] The working principle is: the above-mentioned universal coupling multi-axis output structure is assembled in a twisting tractor, so that its turning radius is reduced to cope with complex road conditions.

[0062] In short, in this embodiment, power can be transmitted from the tractor clutch output shaft 2 6 to the gearbox input shaft 7 via the second universal coupling structure, or from the tractor clutch output shaft 1 4 to the PTO input shaft 5 via the first universal coupling structure 1, or from the rear axle drive shaft 9 to the front axle drive shaft 8 via the third universal coupling structure, and the above three sets of power transmission processes can all achieve twisting.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A nested universal coupling structure, characterized in that: The invention comprises a first universal coupling structure (1), a second universal coupling structure (2) with a hollow interior, and a third universal coupling structure (3), wherein the first universal coupling structure (1) is arranged inside the second universal coupling structure (2), and the third universal coupling structure (3) is arranged outside the second universal coupling structure (2). The two ends of the first universal coupling structure (1) are respectively connected to a tractor clutch output shaft 1 (4) and a PTO input shaft (5), the two ends of the second universal coupling structure (2) are respectively connected to a tractor clutch output shaft 2 (6) and a gearbox input shaft (7), and the two ends of the third universal coupling structure (3) are respectively connected to a front axle drive shaft (8) and a rear axle drive shaft (9).

2. A nested universal coupling structure according to claim 1, characterized in that: The tractor clutch output shaft 2 (6) and the gearbox input shaft (7) are both hollow shafts, the tractor clutch output shaft 1 (4) is located inside the tractor clutch output shaft 2 (6), and the PTO input shaft (5) is located inside the gearbox input shaft (7).

3. The nested universal coupling structure according to claim 1, characterized in that: The first universal coupling structure (1) is a double cross-axis universal coupling.

4. The nested universal coupling structure according to claim 1, characterized in that: The second universal joint structure (2) comprises an annular joint body (21), two cup-shaped joint bodies (22) and two annular cross shafts (23), the annular joint body (21) is provided with a pair of connecting protrusions on both sides, the two cup-shaped joint bodies (22) are provided with notches matching the pair of connecting protrusions on both sides, the two annular cross shafts (23) are arranged between the annular joint body (21) and the two cup-shaped joint bodies (22) and connected to the two, and the ends of the two cup-shaped joint bodies (22) that are away from each other are respectively connected to the second output shaft (6) of the tractor clutch and the input shaft (7) of the gearbox.

5. A nested universal coupling structure according to claim 4, characterized in that: The annular cross shaft (23) comprises a connecting ring (231) and four convex columns (232) arranged on the outer edge of the connecting ring (231) and distributed at equal intervals, wherein two opposite convex columns (232) are rotatably connected to the paired connecting protrusions, and the other two opposite convex columns (232) are rotatably connected to the cup-shaped node (22).

6. The nested universal coupling structure according to claim 1, characterized in that: The third universal joint structure (3) comprises a telescopic portion (31) and two universal joints (32), wherein the two universal joints (32) are respectively arranged at two ends of the telescopic portion (31), and ends of the two universal joints (32) that are away from each other are respectively connected to the front axle drive shaft (8) and the rear axle drive shaft (9).

7. The nested universal coupling structure according to claim 6, characterized in that: The telescopic portion (31) comprises a telescopic rod (311) and a telescopic sleeve (312); one end of the telescopic rod (311) is coaxially sleeved in the telescopic sleeve (312) and connected to the telescopic sleeve (312) via a spline; the other end of the telescopic rod (311) is connected to the front axle drive shaft (8) via a universal joint (32); and the end of the telescopic sleeve (312) away from the telescopic rod (311) is connected to the rear axle drive shaft (9) via a universal joint (32).

8. A twisting tractor, characterized in that: It comprises a nested universal coupling structure as described in any one of claims 1 to 7.

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