A clutch for vertical axis micro-tillage machine

Abstract

The present invention relates to the technical field of clutches, and in particular to a clutch for a vertical axis micro-tiller, wherein one end of the clutch is connected to an input shaft of power, and the other end is connected to an output shaft, and the clutch comprises a friction mechanism and an intermediate disk, wherein the friction mechanism and the intermediate disk are sleeved outside the input shaft and the output shaft, and a first boss is provided on the input shaft, and the first boss is located at the upper part of the friction mechanism; the intermediate disk is connected to the input shaft through a spline, and a shift fork mechanism is connected to the friction mechanism, and the shift fork mechanism is used to drive the friction mechanism to move up and down, thereby realizing the locking and separation of the clutch. The clutch disclosed in the present invention acts on the input shaft, and when the clutch is engaged and disengaged, the friction mechanism of the clutch is directly applied to the input shaft, and torque transmission can be realized without locking the gear ring, and this method directly bypasses the gear ring, so the problem of output torque reduction due to excessive gear ring torque will not occur.

Description

Technical Field

[0001] The invention relates to the technical field of clutches, and in particular to a clutch used for a vertical-axis micro-tillage machine. Background Art

[0002] The clutch is an essential braking component in the agricultural machinery industry. It mainly transmits torque to the whole machine and realizes the output and stop of the whole machine by controlling the clutch.

[0003] At present, in the agricultural machinery industry, especially in the application of vertical axis micro-tillage machines, the market generally adopts a planetary gear structure for deceleration operation. In the planetary gear structure, the input shaft is the sun gear, and the sun gear is provided with a planetary gear outside. The planetary gear is provided with a ring gear. When in use, the ring gear needs to be fixed so that the planetary gear can rotate to output torque. At present, the micro-tillage machine is generally braked by locking the planetary ring gear. When the clutch locks the ring gear, the torque on the ring gear is relatively large due to the large transmission of the planetary ring gear. The gear is not locked very well, causing the ring gear to slip, and the torque output by the micro-tillage machine tool connected to the planetary gear becomes smaller, making tillage difficult. Summary of the invention

[0004] The present invention provides a clutch for a vertical axis micro-tillage machine to solve the problem that the current clutch brakes the gear ring, resulting in a large torque of the gear ring when the clutch is engaged and disengaged, and the gear ring cannot be completely locked, which easily causes the gear ring to slip, resulting in insufficient torque output by the output shaft.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] A clutch for a vertical-axis micro-tiller, one end of the clutch is connected to a power input shaft, and the other end is connected to an output shaft, the clutch comprises a friction mechanism and an intermediate disk, the friction mechanism and the intermediate disk are sleeved outside the input shaft and the output shaft, the input shaft is provided with a first boss, the first boss is located at the upper part of the friction mechanism; the intermediate disk is connected to the input shaft via a spline, the friction mechanism is connected to a fork mechanism, the fork mechanism is used to drive the friction mechanism to move up and down, thereby realizing the locking and separation of the clutch.

[0007] Preferably, the friction mechanism comprises a first friction disc and a second friction disc, both of which are provided with connecting holes, the connecting column passes through the connecting holes to connect the first friction disc and the second friction disc, and the shift fork mechanism is connected to the second friction disc. The friction mechanism is provided with the first friction disc and the second friction disc so that when the clutch is locked, the friction force between the first friction disc and the second friction disc and the intermediate disc is greater.

[0008] Preferably, a second boss is provided in the first friction disc, a first thrust ball bearing is installed in the second boss, a second thrust ball bearing is provided on the outer wall of the second friction disc, and the shift fork mechanism is connected to the second thrust ball bearing. When the clutch is locked, the first thrust ball bearing contacts the first boss to limit the friction mechanism from continuing to move upward. The thrust ball bearing can bear a large axial force, and the second thrust ball bearing is mainly pushed by the shift fork to generate a relatively large axial force. The first thrust ball bearing also bears the axial force, which can reduce the impact force on the input shaft.

[0009] Preferably, the intermediate disk includes a friction portion and a connecting portion, the connecting portion and the friction portion are L-shaped, and the connecting portion is located on the inner wall of the first friction disk. The top of the connecting portion contacts the first thrust ball bearing, and can push the first thrust ball bearing to move upward.

[0010] Preferably, a return spring is sleeved on the connecting column, and the return spring is located between the first friction plate and the second friction plate. When the clutch is locked, the return spring is compressed. When the clutch is disengaged, the second friction plate moves downward under the action of its own gravity and the elastic force of the return spring, so that the friction mechanism is quickly separated from the middle plate.

[0011] Preferably, the input shaft is provided with a first retaining spring, which is located at the lower part of the intermediate disk. When the clutch is in a disengaged state, the intermediate disk will fall freely on the input shaft due to gravity, and the first retaining spring on the input shaft positions the intermediate disk to prevent it from falling further. When the clutch is locked, the first retaining spring and the second retaining spring do not play a positioning role.

[0012] Preferably, a second clamping spring is provided at the bottom of the friction mechanism, and the friction mechanism is limited by the second clamping spring.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the present invention installs the clutch outside the input shaft, sets a first boss on the input shaft, and installs an intermediate disk connected to the driving shaft in the middle of the friction mechanism. After the shift fork makes the friction mechanism move upward to the first boss, the friction mechanism and the intermediate disk are fitted by friction, and the output shaft is connected to the friction mechanism, so that the output shaft outputs torque; when the clutch is disengaged, the friction mechanism moves downward under the action of gravity, and the intermediate disk is still connected to the input shaft and rotates together, but the friction mechanism is separated from the intermediate disk, and the output shaft notifies the torque output. Since the clutch disclosed in the present invention acts on the input shaft, the friction mechanism of the clutch directly acts on the input shaft when the clutch is engaged and disengaged, and torque transmission can be achieved without locking the ring gear. This method directly bypasses the ring gear, so the problem of reduced output torque due to excessive ring gear torque will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a clutch for a vertical-axis micro-tillage machine provided by the present invention;

[0015] Figure 2 for Figure 1 The structural diagram of the middle part;

[0016] Figure 3 is a schematic structural diagram of a first friction disc;

[0017] Figure 4 This is a schematic diagram of the structure of the middle disk.

[0018] Markings in the figure: 1-input shaft, 2-first friction plate, 3-hexagonal nut, 4-connecting column, 5-return spring, 6-second friction plate, 7-second thrust ball bearing, 8-output shaft, 9-second retaining spring, 10-first retaining spring, 11-intermediate plate, 12-first thrust ball bearing, 13-first boss, 14-fork mechanism, 15-second boss, 16-friction part, 17-connecting part. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 on the present invention.

[0022] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0023] like Figure 1 As shown, the present invention discloses a clutch for a vertical-axis micro-tillage machine, one end of the clutch is connected to a power input shaft 1 , and the other end is connected to an output shaft 8 .

[0024] The clutch comprises a friction mechanism and an intermediate disk 11, wherein the friction mechanism and the intermediate disk 11 are sleeved outside the input shaft 1 and the output shaft 8, and the intermediate disk 11 is connected to the input shaft 1 through a spline. The upper and lower surfaces of the intermediate disk are provided with friction materials that cooperate with the friction mechanism. The input shaft is provided with a first retaining spring 10, which is located at the lower part of the intermediate disk 11. The intermediate disk 11 is positioned by the first retaining spring 10 to prevent the intermediate disk 11 from being separated from the input shaft 1.

[0025] The input shaft 1 is provided with a first boss 13, which is located at the upper part of the friction mechanism. The friction mechanism is connected with a fork mechanism 14, which is used to drive the friction mechanism to move up and down, thereby realizing the locking and separation of the clutch. The first boss 13 is used to set the upper limit of the friction mechanism. The friction mechanism stops moving after it moves to contact with the first boss 13. The first boss 13 exerts a downward force on the friction mechanism, and the fork mechanism 14 exerts an upward force on the friction mechanism, so that the friction mechanism rotates in friction contact with the intermediate disk 11.

[0026] The friction mechanism includes a first friction disc 2 and a second friction disc 6. The first friction disc 2 and the second friction disc 6 are both provided with connection holes. The connection column 4 passes through the connection hole to connect the first friction disc 2 and the second friction disc 6. The upper part locks the connection column 4 through the hexagonal nut 3. The second friction disc 6 is connected to the output shaft 8 through a spline. When the second friction disc 6 moves upward, it drives the intermediate disc 11 to move upward, and then drives the first friction disc 2 to move upward. A return spring 5 is sleeved on the connection column 4. The return spring 5 is located between the first friction disc 2 and the second friction disc 6. The return spring 5 allows the first friction disc 2 and the second friction disc 6 to be quickly reset and separated from the intermediate disc 11 when the clutch is disengaged.

[0027] The first friction disc 2 is provided with a second boss 15, the second boss 15 is provided with a first thrust ball bearing 12, the cross section of the second friction disc 6 is L-shaped, the outer wall of the second friction disc 6 is provided with a second thrust ball bearing 7, and the fork mechanism 14 is connected to the second thrust ball bearing 7. When the clutch is locked, the lower section of the first thrust ball bearing 12 and the lower section of the second thrust ball bearing 7 do not rotate. The bottom of the friction mechanism is provided with a second retaining spring 9, and the downward movement of the friction mechanism can be limited by the second retaining spring 9.

[0028] The intermediate disk 11 includes a friction portion 16 and a connecting portion 17, wherein the connecting portion 17 and the friction portion 16 are L-shaped and the connecting portion 17 is located on the inner wall of the first friction disk 2. The interior of the connecting portion 17 is connected to the input shaft 1 through a spline, and the top of the connecting portion 17 contacts the first thrust ball bearing 12. When the clutch is locked, the connecting portion 17 pushes the first thrust ball bearing 12 upward to contact the first boss 13.

[0029] Working process: The intermediate disk 11 is spline-connected with the input shaft 1, and the intermediate disk 11 rotates with the rotation of the input shaft 1. When the clutch needs to be locked, the second thrust ball bearing 7 moves upward through the fork mechanism 14, and the second thrust ball bearing 7 drives the second friction disk 6 upward, and the second friction disk 6 drives the intermediate disk 11 upward. The intermediate disk 11 drives the first friction disk 2 upward, and after the first friction disk 2 and the intermediate disk 11 move upward, the first thrust ball bearing 12 contacts the first boss 13 of the input shaft 1. The first boss 13 restricts the friction mechanism from continuing to move upward, and the first friction disk 2 and the second friction disk 6 are in friction contact with the intermediate disk 11. The intermediate disk 11 drives the first friction disk 2 and the second friction disk 6 to rotate. The output shaft 8 is spline-connected with the second friction disk 6, so it drives the output shaft 8 to rotate to achieve torque output. The second friction disk 6 moves upward on the output shaft 8, and after being locked with the intermediate disk 11, the intermediate disk 11 drives the first friction disk 2 and the second friction disk 6 to rotate together.

[0030] When the clutch is disengaged, the fork mechanism 14 is released, the second thrust ball bearing 7 is reset under the action of gravity, and the second friction plate 6 is also reset under the action of its own gravity and the return spring 5. The second return spring 5 separates the first friction plate 2 and the second friction plate 6 from the intermediate plate 11. At this time, the intermediate plate 11 still rotates with the rotation of the input shaft 1, but the second friction plate 6 no longer rotates with the intermediate plate 11, and the output shaft 8 also stops outputting.

[0031] The present invention directly brakes the input shaft 1 and the output shaft 8 to output torque. Compared with the existing method of locking the ring gear to make the output shaft output torque, the present application avoids the problem that the output shaft torque is small and slips due to the large ring gear torque and the clutch cannot brake in time to lock the ring gear. After the clutch is separated, the second friction plate 6 and the intermediate plate 11 are separated, and the output shaft 8 will not be driven to rotate. Compared with the traditional structure, this structure can greatly reduce the load of the clutch, reduce the size of the clutch, and has the characteristics of simple processing and manufacturing, low cost, etc.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A clutch for a vertical axis tiller, characterized in that: One end of the clutch is connected to the power input shaft (1), and the other end is connected to the output shaft (8). The clutch comprises a friction mechanism and an intermediate plate (11). The friction mechanism and the intermediate plate (11) are sleeved outside the input shaft (1) and the output shaft (8). The input shaft (1) is provided with a first boss (13), and the first boss (13) is located at the upper part of the friction mechanism. The intermediate plate (11) is connected to the input shaft (1) via a spline. The friction mechanism is connected to a shift fork mechanism (14), and the shift fork mechanism (14) is used to drive the friction mechanism to move up and down, thereby realizing the locking and release of the clutch. The upper and lower surfaces of the intermediate disk (11) are both provided with friction materials that cooperate with the friction mechanism; The friction mechanism comprises a first friction disc (2) and a second friction disc (6), the first friction disc (2) and the second friction disc (6) are both provided with connection holes, a connection column (4) passes through the connection holes to connect the first friction disc (2) and the second friction disc (6), and the shift fork mechanism (14) is connected to the second friction disc (6); A second boss (15) is provided in the first friction disc (2), a first thrust ball bearing (12) is installed in the second boss (15), a second thrust ball bearing (7) is provided on the outer wall of the second friction disc (6), and the shift fork mechanism (14) is connected to the second thrust ball bearing (7); A return spring (5) is sleeved on the connecting column (4), and the return spring (5) is located between the first friction disc (2) and the second friction disc (6).

2. The clutch for a vertical axis tiller according to claim 1, characterized in that: The intermediate disk (11) comprises a friction portion (16) and a connecting portion (17); the connecting portion (17) and the friction portion (16) are L-shaped; the connecting portion (17) is located on the inner wall of the first friction disk (2).

3. The clutch for a vertical axis tiller according to claim 1, characterized in that: A first retaining spring (10) is provided on the input shaft, and the first retaining spring (10) is located at the lower part of the intermediate disk (11).

4. The clutch for a vertical axis tiller according to claim 1, characterized in that: A second clamping spring (9) is provided at the bottom of the friction mechanism.

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