A clutch

Abstract

The present invention relates to the field of power transmission accessories, and in particular to a clutch. The clutch includes a housing, a power receiving component, a power output component, a transmission component, and a drive component thereof. The transmission component is engaged with one of the power receiving component and the power output component to prevent rotation. A key transmission structure is provided between the other of the power receiving component and the power output component and the transmission component. The key transmission structure includes a transmission key and a key slot respectively provided on the two components. The power receiving component is also provided with a reset mechanism. The reset mechanism includes a stop structure for stopping the power receiving component at a set angle position. At the set angle position, when the power output component is at a target angle position, the key and the key slot are facing each other. The drive component can drive the transmission component to key the key and the key slot. The reset mechanism also includes an elastic member for driving the power receiving component to return to the set angle position after the clutch is disengaged. The present invention solves the problem that the existing clutch cannot accurately transmit motion.

Description

Technical Field

[0001] The present invention relates to the field of power transmission accessories, and in particular to a clutch. Background Art

[0002] The clutch is an important component for transmitting motion between the power source and the actuator. Currently, common clutches are divided into friction disc clutches, tooth clutches, etc., which are widely used in vehicles, machine tools and other fields. However, in some special occasions, the actuator is required to rotate back and forth between the set rotation angle and the original position, and it is required to have extremely high synchronization, such as requiring the actuator to move synchronously with the power source and transmit accurately. However, due to the limitations of the working mechanism, the power receiving component and the power output component of the existing clutch have a gradual loading process during the coupling process, that is, there is often a time difference from receiving power to transmitting power to the next level, and there will be problems such as transmission "discount" in the early stage of transmission (for example, internal transmission components slipping against each other), which does not meet the requirements of precise transmission.

[0003] In addition, when the clutch is used in situations where there are factors such as strong vibration, the actuator is required to maintain a stable angular position after the clutch is disengaged. When the existing clutch realizes the above function, it can only achieve the purpose by engaging the clutch and providing a reaction force with the power source. In this case, due to the limitations of the working mechanism of the existing clutch, the power receiving component and the power output component of the clutch may move relative to each other, which also cannot meet the requirements. Summary of the Invention

[0004] The object of the present invention is to provide a clutch to solve the problem that existing clutches cannot accurately transmit motion.

[0005] In order to solve the above problems, the clutch of the present invention adopts the following technical solutions: a clutch, comprising a housing and a power receiving component, a power output component and a transmission component and a driving component installed on the housing, the transmission component is engaged with one of the power receiving component and the power output component to prevent rotation, and a key transmission structure is provided between the other of the power receiving component and the power output component and the transmission component, the key transmission structure includes a transmission key and a key slot respectively arranged on the two, the power receiving component is also provided with a reset mechanism, the reset mechanism includes a stopping structure for stopping the power receiving component at a set angle position, at the set angle position, when the power output component is at the target angle position, the transmission key is facing the key slot, and the driving component can drive the transmission component to key the transmission key to the facing key slot, the reset mechanism also includes an elastic member for driving the power receiving component to return to the set angle position after the clutch is disengaged.

[0006] Beneficial effect: The present invention improves the structure of the existing clutch, and a key transmission structure is set between one of the power receiving component and the power output component and the transmission component, and the transmission key transmission structure includes a transmission key and a key slot respectively arranged on the two, and the power receiving component is also provided with a reset mechanism, which can reset the power receiving component to a set angle position after the transmission component is separated from the power output component, and at the set angle position, when the power output component is at the target angle position, the transmission key is opposite to the key slot, and the transmission component can be driven by the driving component to key the transmission key to the key slot, so that each time the transmission is carried out in the next link, a rigid transmission matching structure can be formed between the power receiving component and the power output component through the transmission key and the key slot, so as to realize accurate and sufficient transmission of power, thereby solving the problem that the existing clutch cannot accurately transmit motion.

[0007] Furthermore, the transmission component is mounted on the power output component to prevent rotation. A target position locking structure is provided between the transmission component and the housing or a fixed object on the housing. The target position locking structure includes a locking block and a locking slot, respectively provided on the transmission component and the housing or a fixed object on the housing. When the power output component is at a target angular position, the driving component can drive the transmission component to lock the locking block with the locking slot. The target position locking mechanism formed by the locking block and the locking slot can lock the power output component relative to the housing when the power output component reaches the target angular position, rather than locking the power output component relative to the power device by using the power receiving component of the clutch and the power output component as in the prior art, thereby providing a more reliable locking effect.

[0008] Furthermore, the key transmission structure and the target position locking structure are disposed on opposite sides of the transmission component. When the key transmission structure and the target position locking structure are disposed on opposite sides of the transmission component, the driving component only needs to drive the transmission component to reciprocate to cooperate with them, which can facilitate the arrangement of the driving component.

[0009] Furthermore, the elastic member is a tension spring or a compression spring, and the power receiving component cooperates with the tension spring or the compression spring via a crank arm provided thereon.

[0010] Furthermore, the elastic member is provided with a telescopic guide rod, one end of which is connected to the crank arm and the other end is connected to the housing. The telescopic guide rod can play a radial limiting role for the tension spring or the compression spring, thereby ensuring its reliability during operation.

[0011] Furthermore, the crank arm is provided with a connecting structure for transmission connection with the power device. The connecting structure realizes the multi-purpose of the crank arm and simplifies the structure of the clutch.

[0012] Furthermore, one of the power receiving component and the power output component is rotatably assembled on the other. After the power receiving component and the power output component are rotatably assembled on the other, the relative positioning between the two is facilitated, and the compactness of the overall structure of the clutch is improved.

[0013] Furthermore, the power receiving component and the power output component are matched with each other through a bearing, which can reduce the resistance of the relative movement between the two and ensure the effectiveness of the elastic member.

[0014] Furthermore, the driving component includes a shift fork, and the transmission component is provided with a slot that cooperates with the shift fork. The shift fork is a relatively mature structure for operating the transmission component on the clutch, and has the advantages of simple design and easy implementation.

[0015] Furthermore, the shift fork is rotatably mounted on the housing or a fixed object on the housing via a shift fork shaft, and the shift fork shaft and the fork opening are located in the same plane. The shift fork shaft is easy to control and has the advantages of compact structure and high reliability compared to the connecting rod mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of a clutch according to embodiment 1 of the present invention;

[0017] Figure 2 Schematic diagram of the coordination between the power receiving component and the power output component in the first embodiment of the clutch of the present invention;

[0018] Figure 3 1 is a schematic diagram (partial cross-section) of the cooperation between the power receiving component and the power output component in Example 1 of the clutch of the present invention;

[0019] Figure 4 Schematic diagram of the cooperation between the power receiving component and the housing in Example 1 of the clutch of the present invention;

[0020] Figure 5 1 is a schematic diagram of the coordination between the transmission component, the power output component and the power output component in the first embodiment of the clutch of the present invention;

[0021] Figure 6 Schematic diagram of the cooperation between the driving component and the transmission component in the clutch embodiment 1 of the present invention;

[0022] Figure 7 Schematic diagram of the cooperation between the reset mechanism and the power receiving component in the first embodiment of the clutch of the present invention (the power output component is about to be driven to the target angular position);

[0023] Figure 8Schematic diagram of the cooperation between the reset mechanism and the power receiving component in Example 1 of the clutch of the present invention (the power output component is locked to the target angular position);

[0024] Figure 9 1 is a schematic structural diagram of the reset mechanism in the first embodiment of the clutch of the present invention.

[0025] In the figure: 101, housing; 102, power output component; 103, power receiving component; 104, transmission component; 105, driving component; 106, reset mechanism; 11, front section; 12, middle section; 13, rear section; 111, fixed base; 112, locking block; 31, rotating sleeve; 32, crank arm; 33, connecting structure; 311, transmission key; 107, power device; 131, clearance hole; 41, keyway; 42, lock slot; 43, card slot; 51, shift fork; 52, shift fork rotating shaft; 53, shift fork driving arm; 61, connecting seat; 62, telescopic guide rod; 63, elastic member; 64, blocking structure; 108, brake disc. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0028] It should be noted that relational terms such as "first" and "second" that may appear are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or device. In the absence of further limitations, an element defined by a sentence such as "including a..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0029] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0030] Embodiment 1 of the clutch of the present invention:

[0031] like Figure 1-9 As shown, the clutch includes a housing 101 , a power output component 102 , a power receiving component 103 , a transmission component 104 , a driving component 105 , and a reset mechanism 106 .

[0032] The structure of the housing 101 is as follows Figure 1 As shown, in this embodiment, the housing 101 is divided into three sections, namely a front section 11, a middle section 12, and a rear section 13. The front section 11, the rear section 13, and the middle section 12 are all connected by flanges. The front section 11 is provided with a fixed base 111, which is provided with bolt holes. When in use, the clutch of the present invention can be fixed in the use position by bolts.

[0033] Figure 2 、 3 4 shows the power output component 102, the power receiving component 103 and their matching structure with the housing 101. As shown in the figure, in this embodiment, the power output component 102 is a spline shaft, the two ends of which are respectively matched with the front and rear side walls of the housing 101 through support bearings, and a flat keyway is provided at the front end for connecting with the corresponding actuator to transmit power to the actuator. The power receiving component 103 includes a rotating sleeve 31 rotatably assembled on the power output component 102, the rotating sleeve 31 is matched with the power output component 102 through bearings, and a crank arm 32 ( Figure 5 As can be seen), the crank arm 32 can be used to connect the reset mechanism 106 (described below) on the one hand, and can also be connected to the corresponding power device 107 on the other hand to receive power. Figure 4 As shown, in order to avoid the crank arm 32 , a corresponding clearance hole 131 is provided on the rear section 13 of the housing 101 .

[0034] Depend on Figure 2 and Figure 3 As can be seen, a transmission key 311 is provided at the front end of the rotating sleeve 31. In this embodiment, the transmission key 311 protrudes rearward from the rotating sleeve 31, forming a plug-in structure. Simultaneously, a rearwardly protruding locking block 112 is provided on the inner side of the front sidewall of the housing 11 (in this embodiment, the locking block 112 is specifically mounted on a fixed brake disc 108 on the inner wall of the housing; in other embodiments, it can also be directly mounted on the inner wall of the housing). The functions of the transmission key 311 and the locking block 112 will be described in detail below.

[0035] like Figure 5 、 6As shown, in this embodiment, the transmission component 104 is sleeved onto the power output component 102, splined with the power output component 102, and can reciprocate relative to the power output component 102. A keyway 41 is provided on the rear end face of the transmission component 104, which cooperates with the transmission key 311, and the two together form a key transmission structure; a lock groove 42 is provided on the front end face of the transmission component 104, which corresponds to the lock block 112, and the two together form a target position locking structure. Of course, it should be noted here that the transmission key and keyway are relative terms. The protrusion and groove on the power receiving component and the groove and protrusion on the transmission component mutually constitute the transmission key and keyway. The principles of the lock block and lock groove are similar and will not be elaborated here. When the transmission component 104 slides backward, the transmission key 311 engages with the keyway 41, thereby achieving rigid transmission; when the transmission component 104 slides forward, the lock block 112 cooperates with the lock groove 42 to lock the power output component 102. When the transmission component 104 is located in the middle position, it is neither keyed to the power output component 102 nor locked to the housing 101 and can rotate freely relative to the power output component 102 .

[0036] Figure 6 The figure shows the structure of the drive component 105 of the transmission component 104. As can be seen from the figure, the drive component 105 includes a shift fork 51, a shift fork shaft 52, and a shift fork drive arm 53. A slot 43 is provided between the two ends of the transmission component 104. The shift fork is retained in the slot 43 and can shift the transmission component 104 when rotating with the shift fork shaft 52. In this embodiment, the shift fork shaft 52 and the fork opening of the shift fork 51 are located in the same plane. The shift fork drive arm 53 specifically adopts a crank structure, with its other end connected to a connecting rod to drive the shift fork shaft 52 to reciprocate.

[0037] Figure 7 、 89, the structure of the reset mechanism 106 and its cooperation with the power receiving component 103 can be seen. As shown in the figure, the reset mechanism 106 in this embodiment includes a connecting seat 61, a telescopic guide rod 62 and an elastic member 63, wherein the connecting seat 61 is used to be fixed relative to the shell 101, for example, directly fixed to the shell 101 or fixed to a fixed object on the shell, one end of the telescopic guide rod 62 is hinged to the connecting seat 61, and the other end is hinged to the crank arm 32, and the elastic member 63 is specifically a compressed cylindrical spring here, which is installed between the two sections of the telescopic guide rod 62 and can drive the power receiving component 103 to rotate through the crank arm 32. In order to limit the power receiving component 103 to a set angle position, the reset mechanism 106 also includes a stopping structure 64. In this embodiment, the stopping structure 64 specifically adopts a stop table (in other embodiments, it can also be a stop block between the outer wall of the power receiving component and the shell, etc.). At the set angle position, when the power output component 102 is located at the target angle position, the transmission key is directly opposite to the key slot, and the driving component 105 can drive the transmission component to key the transmission key to the key slot.

[0038] In addition, by Figure 9 It can be seen that, in addition to being connected to the telescopic guide rod 62 , the crank arm 32 is also provided with connecting structures 33 for connecting to a corresponding power source. In this embodiment, the connecting structures 33 are specifically connecting holes.

[0039] Figure 7-8 The process of the clutch of the present invention performing a coupling operation is shown in FIG. Figure 7 As shown, in the initial state, the transmission component 104 is in the middle position, the crank arm 32 is stopped by the stop structure 64 under the action of the reset mechanism, and the transmission key 311 is aligned with the corresponding key slot 41. At this time, the transmission component 104 is first pushed backward by the driving component 105, and the transmission key is engaged with the key slot. The power device 107 drives the power receiving component 103 to rotate through the crank arm 32. The power receiving component 103 will transmit power to the power output component 102 through the transmission component 104 and then to the corresponding actuator. When the power output component 102 reaches the target angular position, the driving component 105 drives the transmission component 104 back to the middle position. At this time, the transmission key and the corresponding key slot are disengaged. The power receiving component 103 will return to the original position under the action of the reset mechanism 106. At this time, the transmission key corresponds to the corresponding key slot in the front-to-back direction, and the locking block 112 corresponds to the corresponding lock slot 42 in the front-to-back direction. If it is necessary to lock the power output component 102, the driving component 105 moves the transmission component 104 forward to engage the locking block with the lock slot.

[0040] Embodiment 2 of the clutch of the present invention:

[0041] In the first embodiment of the clutch of the present invention, both the key transmission structure and the target position locking structure are provided. In this embodiment, the target position locking structure is omitted. In this case, the clutch of this embodiment is suitable for applications where locking the actuator at the target position is not required, or where the operating environment is free of vibration and other factors, making it unnecessary to lock the actuator.

[0042] Embodiment 3 of the clutch of the present invention:

[0043] In the first embodiment of the clutch of the present invention, the transmission key protrudes toward the rear side of the transmission component. In this embodiment, the transmission key protrudes toward the circumferential periphery of the transmission component. In this case, by adaptively changing the position of the keyway, a key transmission structure can also be formed to achieve keyed transmission.

[0044] Embodiment 4 of the clutch of the present invention:

[0045] In Example 1 of the clutch of the present invention, the power receiving component is rotatably mounted on the power output component. In this embodiment, the power receiving component and the power output component are each mounted on the housing. During use, power transmission between the power receiving component and the power output component can still be achieved by moving the transmission sleeve. Of course, in other embodiments, the power output component can also be rotatably mounted on the power receiving component. The specific structure of such a structure can adopt the relevant structure of Example 1 and will not be described in detail here.

[0046] Embodiment 5 of the clutch of the present invention:

[0047] In the first embodiment of the clutch of the present invention, the transmission component is mounted on the power output component. In this embodiment, the transmission component is reciprocally mounted on the housing and splined to the power receiving component; or it is directly mounted on the power receiving component and also splined to the power receiving component.

[0048] Embodiment 6 of the clutch of the present invention:

[0049] In the first embodiment of the clutch of the present invention, the reset mechanism adopts a compression spring. In this embodiment, the reset mechanism adopts a tension spring. Of course, in other embodiments, the reset mechanism can also adopt structures such as a torsion spring or a gas spring.

Claims

1. A clutch comprising a housing (101) and a power receiving component (103), a power output component (102), a transmission component (104) and a driving component (105) mounted on the housing, characterized in that: The transmission component is assembled on the power output component for preventing rotation. A key transmission structure is provided between the power receiving component and the transmission component. The key transmission structure includes a transmission key (311) and a key slot (41) respectively provided on the two components. The power receiving component is also provided with a reset mechanism (106). The reset mechanism includes a stop structure (64) for stopping the power receiving component at a set angle position. At the set angle position, when the power output component is at a target angle position, the transmission keys are all facing the key slots, and the driving component can drive the transmission component to key the transmission keys with the facing key slots. The reset mechanism also includes an elastic member (63) for driving the power receiving component to return to the set angle position after the clutch is disengaged. A target position locking structure is also provided between the power receiving component and the housing or a fixed object on the housing. The target position locking structure includes a locking block (112) and a locking slot (42) respectively provided on the transmission component and the housing or a fixed object on the housing. When the power output component is at the target angle position, the driving component can drive the transmission component to lock the locking block with the locking slot.

2. The clutch according to claim 1, characterized in that: The key transmission structure and the target position locking structure are respectively arranged on two opposite sides of the transmission component (104).

3. The clutch according to claim 1 or 2, characterized in that: The elastic member (63) is a tension spring or a compression spring, and the power receiving component (103) cooperates with the tension spring or the compression spring via a crank arm (32) provided thereon.

4. The clutch according to claim 3, characterized in that: The elastic member (63) is provided with a telescopic guide rod (62), one end of the telescopic guide rod (62) is connected to the crank arm (32), and the other end is connected to the housing (101).

5. The clutch according to claim 3, characterized in that: The crank arm (32) is provided with a connection structure (33) for transmission connection with the power device (107).

6. The clutch according to claim 1 or 2, characterized in that: One of the power receiving component (103) and the power output component (102) is rotatably assembled on the other.

7. The clutch according to claim 6, characterized in that: The power receiving component (103) and the power output component (102) are matched via a bearing.

8. The clutch according to claim 1 or 2, characterized in that: The driving component (105) includes a shift fork (51), and the transmission component is provided with a slot (43) that cooperates with the shift fork (51).

9. The clutch according to claim 8, characterized in that: The shift fork (51) is rotatably assembled on the housing (101) or a fixed object on the housing via a shift fork rotating shaft (52), and the shift fork rotating shaft (52) and the fork opening of the shift fork (51) are located in the same plane.

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