Clutch device

Abstract

The utility model discloses a clutch device which comprises a shell, a first transmission piece is rotatably connected in the shell, a second transmission piece is coaxially and rotatably matched in the first transmission piece, and a combining piece matched with the first transmission piece in a clutch mode is slidably connected to the second transmission piece in the radial direction. A driving mechanism used for driving the combining piece to slide is connected to the second transmission piece and comprises an elastic piece used for keeping the separating trend between the combining piece and the first transmission piece. According to the scheme, the problem that in the prior art, a clutch device needs to additionally apply acting force to cut off power, and power cut-off is not timely is easily caused is solved.

Description

Technical Field

[0001] The utility model relates to mechanical transmission equipment, in particular to a clutch device. Background Art

[0002] Japanese patent document JP1997121635A discloses a clutch mechanism used in a self-propelled fertilizer spreader. Figure 1 As shown, the output shaft 19 connected to the first sprocket 10b is installed on the housing 7a of the reducer 7 through the bearing 7b, and the sleeve 20 with the worm wheel 9b is installed around the output shaft 19 of the reducer 7; the first pin 15 and the second pin 16 are inserted into the hollow space of the output shaft 19 and can slide freely in the axial direction to resist the spring 21. Several openings passing through the hollow space are formed around the output shaft 19, and connecting balls 18 are installed in these openings; therefore, at any time, the first pin 15 and the second pin 16 will be pressed outward by the spring 21, and the conical surface of the second pin 16 will push the connecting ball to the inner surface of the sleeve 20, connecting the worm wheel 9b and the sleeve 20 with the output shaft 19, and transmitting power from the reduction gear to the first sprocket 10b; power is transmitted from the reduction box to the first sprocket 10b. When the clutch lever 23 is operated, the clutch wire 13 is pulled, and the clutch arm 14 pushes the head of the protruding first pin 15, thereby pushing the first pin 15 and the second pin 16 inward toward the spring 21. This causes the connecting ball 18 to fall into the groove between the first pin 15 and the second pin 16, thereby disconnecting the output shaft 19 from the sleeve 20, and cutting off the transmission from the reduction gear 7 to the first sprocket 10b.

[0003] Although the above solution can realize the power cut-off operation, it requires a pressing operation to effectively cut off the power transmission, that is, the operator needs to apply force to cut off the power. When such a setting is used on a trimming machine, it is easy to cause the power not to be cut off in time due to the small force applied, which may cause danger; and the above solution has the problem of poor sliding of the pin shaft and severe wear. Utility Model Content

[0004] The utility model aims to provide a clutch device to solve the problem in the prior art that the clutch device needs to apply an additional force to disconnect the power, which easily leads to untimely power cut-off.

[0005] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a clutch device, including a shell, a first transmission member is rotatably connected in the shell, a second transmission member is coaxially rotatably matched in the first transmission member, a coupling member that is radially slidably connected to the second transmission member and engages with the first transmission member in a clutch, the second transmission member is connected to a driving mechanism for driving the coupling member to slide, and the driving mechanism includes an elastic member for maintaining a separation tendency between the coupling member and the first transmission member.

[0006] The beneficial effect of this basic scheme is that: by adopting such a setting, by applying a force to the driving mechanism, the driving mechanism drives the coupling member and the first transmission member to be in a coupled state, so that the power is transmitted between the first transmission member and the second transmission member through the coupling member, and in the process of applying a force to the driving mechanism, the elastic potential energy of the elastic member gradually increases; when it is necessary to cut off the power transmission between the first transmission member and the second transmission member, by removing the force applied to the driving mechanism, the elastic member releases the elastic potential energy and restores the driving mechanism to its original state, so that the power transmission between the coupling member and the first transmission member can be cut off through relative movement. This scheme realizes the power cut-off by unloading operation. Compared with the prior art that realizes the power cut-off by applying force operation, this scheme is easier to operate, which is conducive to improving the timeliness of power cut-off.

[0007] Preferably, the fixed end of the elastic member is connected to the housing, and the movable end of the elastic member is connected to the driving mechanism. With such an arrangement, the elastic member is supported by the housing, which is conducive to improving the reliability of the elastic member.

[0008] Preferably, the driving mechanism comprises a driving member, the driving member is slidably connected to the second transmission member along the axial direction of the second transmission member, the elastic member is sleeved on the outside of the driving member, the fixed end of the elastic member is connected to the housing, and the movable end of the elastic member is connected to the driving member. Such a setting is conducive to making the installation of the elastic member simpler, reducing space occupation, and improving the reliability of the device.

[0009] Preferably, the elastic member is located inside the second transmission member. With such a configuration, interference of the elastic member with other components or debris can be reduced, which is conducive to further improving the reliability of the device.

[0010] Preferably, the driving member is rotationally matched with the second transmission member. With such an arrangement, the driving member does not need to rotate with the second transmission member whether the clutch device is in a state of transmitting power or cutting off power, thereby making the installation of the driving member simpler and facilitating the reliability of the device.

[0011] Preferably, the driving mechanism further comprises an operating member, the operating member is hinged to the housing, and the driving member is movably connected to the operating member. With such a configuration, the driving member can be driven to move by swinging the operating member, thereby facilitating control of the driving member and improving the convenience of operation.

[0012] Preferably, the second transmission member is provided with a blind hole cavity along the axial direction for the driving member to slide, and the second transmission member is provided with a pressure relief hole connected to the bottom of the blind hole cavity. Such a configuration is advantageous for limiting the moving distance of the driving member by using the bottom of the blind hole cavity, and at the same time, the configuration of the pressure relief hole can reduce the influence of the air between the driving member and the bottom of the blind hole cavity on the movement of the driving member, which is advantageous for improving the smoothness of the movement of the driving member.

[0013] Preferably, the coupling member is spherical, and the driving member is provided with a receiving groove for accommodating the coupling member when the coupling member is separated from the first transmission member. The driving member is also provided with a supporting section for supporting the coupling member when the coupling member is combined with the first transmission member, and a transition section is provided between the receiving groove and the supporting section.

[0014] The utility model has the following beneficial effects:

[0015] The adoption of this solution makes the operation of disconnecting the power of the clutch device simpler and more convenient, thereby facilitating the timeliness of power cut-off, especially when used on a trimmer, facilitating the use safety of the trimmer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the prior art;

[0017] Figure 2 It is a schematic diagram of an embodiment of a clutch device of the utility model;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure of the middle driving part;

[0019] Figure 4 for Figure 2 Schematic diagram of the structure of the second transmission member. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The figure marks in the drawings of the specification include: housing 1, operating member 2, first transmission member 3, coupling member 4, second transmission member 5, pressure relief hole 6, driving member 7, accommodating groove 71, transition section 72, supporting section 73, elastic member 8, blind hole cavity 9, sliding hole 10.

[0022] The embodiment is basically as shown in the attached Figures 2 to 4As shown: A clutch device includes a housing 1, a first transmission member 3 is rotatably connected in the housing 1, and a second transmission member 5 is coaxially rotatably matched in the first transmission member 3. In this embodiment, the second transmission member 5 axially penetrates the first transmission member 3. A coupling member 4 that is engaged and engaged with the first transmission member 3 is radially slidably connected on the second transmission member 5. In this embodiment, the coupling member 4 is spherical, and a sliding hole 10 for the coupling member 4 to move is radially provided on the second transmission member 5. A driving mechanism for driving the coupling member 4 to slide is connected to the second transmission member 5, and the driving mechanism includes an elastic member 8 for maintaining a separation tendency between the coupling member 4 and the first transmission member 3.

[0023] In this embodiment, the driving mechanism includes a driving member 7, and the driving member 7 is slidably connected to the second transmission member 5 along the axial direction of the second transmission member 5. Specifically, the second transmission member 5 is provided with a blind hole cavity 9 for the driving member 7 to slide along the axial direction, and the driving member 7 is inserted into the blind hole cavity 9 to achieve sliding cooperation with the second transmission member 5. In this embodiment, the blind hole cavity 9 is preferably cylindrical, so that the driving member 7 can rotate in the blind hole cavity 9, and the driving member 7 can rotate with the second transmission member 5. The sliding hole 10 on the second transmission member 5 is connected with the blind hole cavity 9, so that it is convenient for the driving member 7 to drive the coupling member 4 to move along the radial direction of the second transmission member 5. In this embodiment, the driving member 7 is provided with a receiving groove 71 for accommodating the coupling member 4 when the coupling member 4 is separated from the first transmission member 3. The driving member 7 is also provided with a supporting section 73 for supporting the coupling member 4 when the coupling member 4 is combined with the first transmission member 3. A transition section 72 is provided between the receiving groove 71 and the supporting section 73, so that the coupling member 4 can move smoothly between the receiving groove 71, the transition section 72 and the supporting section 73 when the driving member 7 moves axially.

[0024] The second transmission member 5 is provided with a pressure relief hole 6 connected to the bottom of the blind hole cavity 9, so as to reduce the influence of the air at the bottom of the blind hole cavity 9 on the movement of the driving member 7. In this embodiment, the fixed end of the elastic member 8 is connected to the housing 1, and the movable end of the elastic member 8 is connected to the driving mechanism. Specifically, the elastic member 8 is preferably a coil spring, which is sleeved on the outside of the driving member 7, the fixed end of the elastic member 8 is connected to the housing 1, and the movable end of the elastic member 8 is connected to the driving member 7, so that the elastic member 8 elastically supports the driving member 7 through the support of the housing 1. Under the support of the elastic member 8, the driving member 7 has a tendency to keep the receiving groove 71 facing the sliding hole 10 at all times, so when the driving mechanism loses the external force, the elastic member 8 will immediately move the driving member 7 to a state where the receiving groove 71 faces the sliding hole 10, so that the coupling member 4 and the first transmission member 3 can be separated freely. In this embodiment, the elastic member 8 is located inside the second transmission member 5. In this embodiment, the driving mechanism also includes an operating member 2, which is hinged to the shell 1, and the driving member 7 is movably connected to the operating member 2, so that the operating member 2 forms a lever that can drive the driving member 7 to move under the support of the shell 1, so that the driving member 7 can be driven to move by swinging the operating member 2 around the hinge point between the shell 1.

[0025] The specific implementation process is as follows: Under normal conditions, the operating member 2 is not subjected to external forces, so that the driving member 7 is in a state where the receiving groove 71 is opposite to the sliding hole 10 under the elastic force of the elastic member 8, and the coupling member 4 can slide freely at the sliding hole 10, that is, the coupling member 4 and the first transmission member 3 are in a non-combination state, so that the first transmission member 3 and the second transmission member 5 cannot transmit power through the coupling member 4. When it is necessary to transmit power between the first transmission member 3 and the second transmission member 5, the operating member 2 is swung around the hinge point between the housing 1 by applying force to the driving mechanism, so that the operating member 2 drives the driving member 7 to move, so that the driving member 7 gradually transitions from the state where the receiving groove 71 is opposite to the sliding hole 10 to the state where the supporting section 73 is opposite to the sliding hole 10, so that the driving member 7 drives the coupling member 4 to move along the sliding hole 10 and gradually combines with the first transmission member 3, so that the first transmission member 3 and the second transmission member 5 can realize power transmission through the coupling member 4. In the process of driving the driving member 7 to move by the operating member 2, the elastic member 8 is gradually compressed, and the elastic potential energy gradually increases. When it is necessary to cut off the power transmission between the first transmission member 3 and the second transmission member 5, by removing the force applied to the driving mechanism, the elastic member 8 releases the elastic potential energy and restores the driving mechanism to its original state, so that the power transmission between the coupling member 4 and the first transmission member 3 can be cut off through relative movement. This solution cuts off the power by unloading the force, which is easier to operate than the prior art that cuts off the power by applying the force, thereby facilitating the timeliness of the power cut.

[0026] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A clutch device, comprising a housing, a first transmission member rotatably connected in the housing, a second transmission member coaxially rotatably matched in the first transmission member, a coupling member radially slidably connected to the second transmission member for clutching and engaging with the first transmission member, and a driving mechanism for driving the coupling member to slide connected to the second transmission member, characterized in that: The driving mechanism comprises an elastic member for maintaining a separation tendency between the combining member and the first transmission member.

2. The clutch device according to claim 1, characterized in that: The fixed end of the elastic member is connected to the housing, and the movable end of the elastic member is connected to the driving mechanism.

3. The clutch device according to claim 2, characterized in that: The driving mechanism includes a driving member, which is slidably connected to the second transmission member along the axial direction of the second transmission member. The elastic member is sleeved on the outside of the driving member, the fixed end of the elastic member is connected to the shell, and the movable end of the elastic member is connected to the driving member.

4. The clutch device according to claim 3, characterized in that: The elastic member is located inside the second transmission member.

5. The clutch device according to claim 4, characterized in that: The driving member is rotationally matched with the second transmission member.

6. The clutch device according to claim 5, characterized in that: The second transmission member is axially provided with a blind hole cavity for the driving member to slide, and the second transmission member is provided with a pressure relief hole communicated with the bottom of the blind hole cavity.

7. The clutch device according to any one of claims 1 to 6, characterized in that: The driving mechanism further comprises an operating member, the operating member is hinged to the housing, and the driving member is movably connected to the operating member.

8. The clutch device according to claim 7, characterized in that: The coupling member is spherical, and the driving member is provided with a receiving groove for accommodating the coupling member when the coupling member is separated from the first transmission member. The driving member is also provided with a supporting section for supporting the coupling member when the coupling member is combined with the first transmission member, and a transition section is provided between the receiving groove and the supporting section.

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