Clutch capable of being meshed at any phase

Abstract

The invention discloses a clutch capable of meshing at any phase, which is characterized by comprising an outer cylinder, an inner sliding block, a shaft pin, a limiting sleeve, a driving ring and a spring, the inner sliding block is arranged in the outer cylinder, the inner side of the inner sliding block is provided with a through hole matched with the shape of the shaft pin, the outer side of the inner sliding block is provided with the external thread sliding block, the external thread sliding block is matched with the internal thread of the outer cylinder, the external thread sliding block and the external thread sliding block are mutually meshed and do spiral motion through thread meshing, and the spring is fixed at the bottom of the outer cylinder and pushes the inner sliding block to a limiting sleeve at the top of the large-lead internal thread outer cylinder; phase positions are automatically matched through spiral movement of the inner sliding block in the outer cylinder, and meshing can be achieved at any phase position; torque is transmitted through the prism structure, and transmission of large torque can be achieved with a small diameter. After the inner sliding block is meshed with the shaft pin, friction self-locking is achieved through the thread angle between the inner sliding block and the outer cylinder, overall locking of the clutch is achieved, an additional locking device is not needed, and the structure is simple.

Description

Technical Field

[0001] The invention belongs to the field of clutch preparation, in particular to a clutch capable of engaging in any phase. Background Art

[0002] When the clutch is engaged in a stationary state after rotation, the meshing teeth are not necessarily in the appropriate phase due to the uncertain phase difference generated during the rotation process, which will affect the phase accuracy of the meshing and even make it impossible to mesh. The existing friction clutch has the disadvantages of being large in size and having a small torque transmission. Therefore, in application scenarios where the actuation distance needs to be precisely controlled, a high-torque clutch that can engage at any phase can improve the control accuracy. Summary of the invention

[0003] In view of the above technical defects, the present invention discloses a clutch capable of engaging in any phase. The clutch capable of engaging in any phase provided by the present invention automatically matches phases through the spiral motion of an inner slider in an outer cylinder, has a simple structure and a large bearing torque.

[0004] The present invention is achieved in that: The present invention discloses a clutch capable of engaging in any phase, characterized in that the clutch comprises: an outer cylinder, an inner slider, an axle pin, a limiting sleeve, an active ring and a spring; the inner slider is inside the outer cylinder, a through hole matching the shape of the axle pin is provided on the inner side of the inner slider, an external thread slider is provided on the outer side of the inner slider, matching the internal thread of the outer cylinder, the two are engaged with each other and perform spiral motion through thread engagement, the spring is fixed at the bottom of the large-lead internal thread outer cylinder, and the inner slider is pushed to the limiting sleeve at the top of the large-lead internal thread outer cylinder; the axle pin is coaxial with the inner slider and can move and rotate axially, and the active ring is coaxial with the axle pin; there is only relative movement but no relative rotation between the active ring and the axle pin.

[0005] Furthermore, the shaft pin includes a cylindrical section, a transition section, and a prismatic section. The cylindrical section is an inscribed circle of the prismatic section and serves as a positioning when the clutch is disengaged. The prismatic section is consistent with the cross-sectional shape of the through hole on the inner side of the inner slider to transmit torque.

[0006] Furthermore, in the threaded movement of the inner slider, there is only one position that matches the phase of the shaft pin, and the inner slider itself has mass and cannot complete the engagement instantly. It takes a period of time from phase matching to completing the engagement, which is called the engagement buffer section.

[0007] Furthermore, in the engagement buffer section, the axle pin and the inner slider need to remain in an engageable state at all times, otherwise there is a possibility of slipping; the shape of the axle pin is processed so that it can always engage with the inner slider in the engagement buffer section. During this stroke, the inner slider decelerates and stops under the action of the spring, and the axle pin and the inner slider complete the engagement.

[0008] Furthermore, when the shaft pin is inserted into the large-lead internally threaded outer cylinder at any phase, the inner slider has one and only one position that matches the phase of the shaft pin. The shaft pin pushes the inner slider to make a spiral motion along the inner thread of the outer cylinder from the cylinder mouth of the outer cylinder. After encountering the matching position, the shaft pin shape is completely aligned with the hole of the inner slider, and no thrust is applied to the inner slider. The shaft pin is inserted into and passes through the inner slider to complete the locking of the inner slider, and the inner slider itself is self-locked with the outer cylinder through friction; when the shaft pin is pulled out, the inner slider returns to the cylinder mouth position of the outer cylinder under the action of the spring, and contacts with the limit sleeve to complete the reset.

[0009] Furthermore, there is an internal thread inside the outer cylinder and an external thread outside the inner slider, and the two mesh with each other and can be frictionally self-locked during axial rotation. There is a spring between the inner slider and the outer cylinder. When disengaged, the inner slider is pressed on the cylinder mouth limit sleeve by the spring thrust. The contour of the cylindrical section of the shaft pin is the inscribed circle of the inner hole polygon of the inner slider. When the shaft pin rotates, the cylindrical section rotates in the inner hole of the inner slider, which has a positioning effect and does not transmit torque. When meshing, the shaft pin moves toward the bottom of the outer cylinder. When the phase is not matched, the prism section interferes with the inner hole of the inner slider, and the shaft pin pushes the inner slider to move. Under the action of the thread, the inner slider rotates while moving axially. When the phase is matched, the prism section does not interfere with the inner slider, and the driving force of the shaft pin on the inner slider disappears. Under the action of the spring, the inner slider stops moving, and the shaft pin continues to move and passes through the inner hole of the inner slider. At a certain phase, the position of the inner slider in the outer cylinder is uniquely determined, and when transmitting torque, due to friction self-locking, there is no relative movement between the inner slider and the outer cylinder. Since there is only one position that matches the phase of the shaft pin in the threaded motion of the inner slider, and the inner slider itself has mass and cannot complete the meshing instantly, it takes some time from phase matching to complete meshing. An engagement buffer section is designed on the shaft pin shape. In the engagement buffer section, the shaft pin and the inner slider always remain in a meshing state, expanding the meshing window period so that meshing can be ensured at a certain shaft pin speed. When the clutch is disengaged, the inner slider is pushed back to the mouth of the outer cylinder by the spring to complete the automatic reset.

[0010] The beneficial effects of the present invention compared with the prior art are: The present invention can achieve meshing at any phase by automatically matching the phases through the spiral motion of the inner slider in the outer cylinder; the torque is transmitted by the prismatic structure, so that a larger torque can be transmitted with a smaller diameter; after the inner slider is meshed with the shaft pin, friction self-locking is achieved through the thread angle between the inner slider and the outer cylinder, thereby achieving overall locking of the clutch, without the need for an additional locking device, and with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall appearance of the present invention; Figure 2 It is a schematic diagram of radial cross section of the meshing state of the present invention; Figure 3 It is a schematic diagram of a radial cross section of the present invention in a disengaged state; Figure 4 It is a schematic diagram of the axial cross section of the meshing state of the present invention; Figure 5 It is a schematic cross-sectional view of the outer cylinder of the present invention; Figure 6 It is a schematic diagram of the inner slider of the present invention; Figure 7 It is a schematic diagram of the shaft pin of the present invention; Figure 8 It is a schematic diagram of the shaft pin sections of the present invention; Among them, 1-outer cylinder, 2-inner slider, 3-axle pin, 4-limit sleeve, 5-active ring, 6-spring, 31-cylindrical section, 32-transition section, 33-prismatic section, 34-engaging buffer section. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail by enumerating examples below. It should be noted that the specific implementation described here is only used to explain the present invention and is not used to limit the present invention.

[0013] like Figures 1 to 8 As shown, a clutch with arbitrary phase engagement of the present invention comprises a driven large-lead internally threaded outer cylinder 1, an inner slider 2, an axle pin 3, a limit sleeve 4, an active ring 5, and a spring 6. The outer cylinder, the inner slider, the axle pin, and the active ring are all coaxial.

[0014] There is only relative movement between the active ring 5 and the shaft pin 3, but no relative rotation. There is a through hole on the inner side of the inner slider 2 that matches the shape of the shaft pin 3, and there is an external thread slider on the outer side of the inner slider 2 that matches the internal thread of the outer cylinder, and the two are meshed with each other. The shaft pin 3 is divided into a cylindrical section 31, a transition section 32 and a prism section 33. The cylindrical section is the inscribed circle of the prism section, which serves as a positioning when the clutch is disengaged. The prism section is consistent with the cross-sectional shape of the through hole on the inner side of the inner slider 2, and can transmit torque.

[0015] When the shaft pin 3 is inserted into the large-lead internally threaded outer cylinder at any phase, the inner slider 2 has and only has one position that matches the phase of the shaft pin. The shaft pin 3 pushes the inner slider 2 to make a spiral motion along the inner thread of the outer cylinder from the mouth of the outer cylinder. After encountering the matching position, the shape of the shaft pin 3 is completely aligned with the hole of the inner slider 2, and no thrust is applied to the inner slider. The shaft pin 3 is inserted into and passes through the inner slider, completing the locking of the inner slider 2. The inner slider 2 itself and the outer cylinder 1 are self-locked by friction.

[0016] When the shaft pin 3 is pulled out, the inner slider 2 returns to the tube mouth position of the outer tube 1 under the action of the spring 6, and contacts the limit sleeve 4 to complete the reset. The arbitrary phase meshing clutch provided by the present invention automatically matches the phase through the spiral motion of the inner slider in the outer tube, has a simple structure, and has a large bearing torque.

[0017] Since there is only one position that matches the phase of the shaft pin 3 in the threaded motion of the inner slider 2, and the inner slider 2 itself has mass and cannot instantly complete the engagement, it takes a period of time from phase matching to complete engagement, which is called the engagement buffer section 34. In the engagement buffer section 34, the shaft pin 3 and the inner slider 2 need to remain in an always meshable state, otherwise there is a possibility of slipping. Therefore, the shape of the shaft pin 3 is processed so that it can always mesh with the inner slider 2 in the meshing buffer section 34. During this stroke, the inner slider 2 slows down and stops under the action of the spring 6, and the shaft pin 3 and the inner slider 2 complete the engagement.

[0018] There is an internal thread inside the outer cylinder 1, and an external thread outside the inner slider 2. The two mesh with each other and can be frictionally self-locked during axial rotation; there is a spring 6 between the inner slider 2 and the inner slider 2. When disengaged, the inner slider 2 is pressed against the cylinder mouth limit sleeve 4 by the thrust of the spring 6. The contour of the cylindrical section 31 of the shaft pin 3 is the inscribed circle of the polygonal inner hole of the inner slider 2. When the shaft pin 3 rotates, the cylindrical section 31 rotates in the inner hole of the inner slider 2, which has a positioning effect and does not transmit torque; when meshing, the shaft pin 3 moves to the bottom of the outer cylinder 1. When the phases do not match, the prismatic section 33 interferes with the inner hole of the inner slider 2, and the shaft pin 3 pushes The inner slider 2 moves, and under the action of the thread, the inner slider 2 rotates while moving axially; when the phases are matched, the prism section 33 does not interfere with the inner slider 2, and the driving force of the shaft pin 3 on the inner slider 2 disappears. Under the action of the spring 6, the inner slider 2 stops moving, and the shaft pin 3 continues to move and passes through the inner hole of the inner slider 2; at a certain phase, the position of the inner slider 2 in the outer cylinder 1 is uniquely determined, and when transmitting torque, due to friction self-locking, there is no relative movement between the inner slider 2 and the outer cylinder 1; when the clutch is disengaged, the inner slider 2 is pushed back to the mouth of the outer cylinder 1 by the spring 6 to complete automatic resetting.

[0019] Since in the threaded movement of the inner slider 2, there is only one position that matches the phase of the shaft pin 3, and the inner slider 2 itself has mass and cannot complete the engagement instantly, it takes some time from phase matching to completing the engagement; the engagement buffer section 34 is arranged on the outer shape of the shaft pin 3. In the engagement buffer section 34, the shaft pin 3 and the inner slider 2 are always kept in an engageable state, thereby expanding the engagement window period, so that the engagement can be ensured at a certain shaft pin 3 speed.

[0020] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A clutch capable of engaging in any phase, characterized in that: The clutch comprises: An outer cylinder (1), an inner slider (2), a shaft pin (3), a limiting sleeve (4), an active ring (5), and a spring (6); The inner slider (2) is inside the outer cylinder (1), and a through hole matching the shape of the shaft pin (3) is provided on the inner side of the inner slider (2). An external threaded slider is provided on the outer side of the inner slider (2) and matches the internal thread of the outer cylinder. The two are meshed with each other and perform spiral motion through threaded meshing. The spring (6) is fixed at the bottom of the outer cylinder (1) to push the inner slider (2) to the limit sleeve 4 at the top of the outer cylinder (1); the shaft pin (3) is coaxial with the inner slider (2) and can move axially and rotate; the active ring (5) is coaxial with the shaft pin (3); there is only relative movement but no relative rotation between the active ring (5) and the shaft pin (3).

2. Outer cylinder (1) Inner slider (2) Axle pin (3) Active ring (5) A clutch capable of engaging in any phase according to claim 1, characterized in that: The shaft pin comprises a cylindrical section (31), a transition section (32), and a prism section (33); the cylindrical section (31) is an inscribed circle of the prism section (33) and serves as a positioning device when the clutch is disengaged; the prism section (33) has the same cross-sectional shape as the inner through hole of the inner slider (2) and transmits torque.

3. A clutch capable of engaging in any phase according to claim 3, characterized in that: In the threaded movement of the inner slider (2), there is only one position where the phase matches with the shaft pin (3), but the inner slider (2) itself has mass and cannot complete the engagement instantly. It takes a period of time from phase matching to completion of the engagement, which is called the engagement buffer section, i.e., the engagement buffer section (34).

4. A clutch capable of engaging in any phase according to claim 4, characterized in that: In the engagement buffer section (34), the shaft pin (3) and the inner slider (2) need to remain in an always engageable state, otherwise there is a possibility of slipping; the shape of the shaft pin (3) is processed so that it can always engage with the inner slider (2) in the engagement buffer section (34), and within the travel time, the inner slider (2) decelerates and stops under the action of the spring (6), and the shaft pin (3) and the inner slider (2) complete engagement.

5. A clutch capable of engaging in any phase according to claim 1, characterized in that: When the shaft pin (3) is inserted into the outer cylinder (1) at any phase, the inner slider (2) has and only has one position that matches the phase of the shaft pin (3). The shaft pin (3) pushes the inner slider to perform a spiral motion from the mouth of the outer cylinder (1) along the inner thread of the outer cylinder. After reaching the matching position, the shape of the shaft pin (3) is completely aligned with the hole of the inner slider (2), and no thrust is applied to the inner slider (2). The shaft pin (3) is inserted into and passes through the inner slider (2), completing the locking of the inner slider (2). The inner slider (2) and the outer cylinder (1) are self-locked by friction. When the shaft pin (3) is pulled out, the inner slider (2) returns to the mouth of the outer cylinder (1) under the action of the spring (6), and contacts the limit sleeve (4) to complete the reset.

6. A clutch capable of engaging in any phase according to claim 1, characterized in that: The outer cylinder (1) has an internal thread inside, and the inner slider (2) has an external thread outside, and the two mesh with each other and can be self-locked by friction during axial rotation; A spring (6) is provided between the inner slider (2). When the inner slider (2) is in a disengaged state, the inner slider (2) is pressed onto the barrel mouth limiting sleeve (4) by the thrust of the spring (6). The contour of the cylindrical section (31) of the shaft pin (3) is the inscribed circle of the polygonal inner hole of the inner slider (2). When the shaft pin (3) rotates, the cylindrical section (31) rotates in the inner hole of the inner slider (2), which has a positioning effect and does not transmit torque. When meshing, the shaft pin (3) moves toward the bottom of the outer cylinder (1). When the phases are mismatched, the prism section (33) interferes with the inner hole of the inner slider (2), and the shaft pin (3) pushes the inner slider (2) to move. Under the action of the thread, the inner slider (2) rotates while moving axially. When the phases are matched, the prism segment (33) does not interfere with the inner slider (2), the driving force of the shaft pin (3) on the inner slider (2) disappears, and under the action of the spring (6), the inner slider (2) stops moving, while the shaft pin (3) continues to move and passes through the inner hole of the inner slider (2); at a certain phase, the position of the inner slider (2) in the outer cylinder (1) is uniquely determined, and when transmitting torque, due to friction self-locking, there is no relative movement between the inner slider (2) and the outer cylinder (1); When the clutch is disengaged, the inner slider (2) is pushed back to the mouth of the outer cylinder (1) by the spring (6), completing automatic reset.

7. A clutch capable of engaging in any phase according to claim 6, characterized in that: Since there is only one position in the threaded motion of the inner slider (2) that matches the phase of the shaft pin (3), and the inner slider (2) itself has mass and cannot complete the meshing instantly, it takes some time from phase matching to complete meshing; An engagement buffer section (34) is provided on the outer shape of the shaft pin (3). In the engagement buffer section (34), the shaft pin (3) and the inner slider (2) are always kept in an engageable state, thereby expanding the engagement window period so that engagement can be ensured at a certain shaft pin (3) speed.

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