A clutch that can be engaged at any phase

Abstract

The application discloses a clutch capable of engaging 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 inside 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 an outer thread sliding block matched with the inner thread of the outer cylinder, the outer thread sliding block and the outer cylinder are engaged with each other and perform spiral movement through thread engagement, the spring is fixed at the bottom of the outer cylinder and pushes the inner sliding block to the limiting sleeve at the top of the outer cylinder with large lead thread; the clutch can automatically match phases through the spiral movement of the inner sliding block in the outer cylinder and can realize engagement at any phase; the prism structure is used to transmit torque, and a relatively large torque can be transmitted with a relatively small diameter; after the inner sliding block is engaged with the shaft pin, friction self-locking is realized through the thread angle between the inner sliding block and the outer cylinder, the overall locking of the clutch is realized, and no additional locking device is needed, so that the structure is simple.

Description

Technical Field

[0001] This invention belongs to the field of clutch manufacturing, specifically a clutch that can engage in any phase. Background Technology

[0002] When a clutch engages in a stationary state after rotation, the uncertain phase difference generated during rotation means that the meshing teeth may not be in the appropriate phase, which affects the accuracy of the engagement phase or even prevents engagement. Existing friction clutches have the disadvantages of large size and low torque transmission. Therefore, in applications that require precise control of the operating distance, a high-torque clutch that can engage at any phase can improve control accuracy. Summary of the Invention

[0003] To address the aforementioned technical deficiencies, this invention discloses a clutch capable of arbitrary phase engagement. The arbitrary phase engagement clutch provided by this invention automatically matches the phase through the helical motion of the inner slider in the outer cylinder, resulting in a simple structure and a large torque capacity.

[0004] This invention is implemented as follows:

[0005] This invention discloses a clutch capable of arbitrary phase engagement, characterized in that the clutch comprises: an outer cylinder, an inner slider, a pin, a limiting sleeve, a driving ring, and a spring; the inner slider is located inside the outer cylinder, with a through hole on its inner side matching the shape of the pin, and an externally threaded slider on its outer side matching the internal thread of the outer cylinder, the two engaging with each other to perform helical motion through thread engagement; the spring is fixed at the bottom of the outer cylinder with a large lead internal thread, pushing the inner slider to the limiting sleeve at the top of the outer cylinder with a large lead internal thread; the pin is coaxial with the inner slider and can move and rotate axially, and the driving ring is coaxial with the pin; there is only relative movement between the driving ring and the pin, and no relative rotation.

[0006] Furthermore, the shaft pin includes a cylindrical section, a transition section, and a prism section. The cylindrical section is the inscribed circle of the prism section and serves as a positioning element when the clutch disengages. The prism section has the same cross-sectional shape as the inner through hole of the inner slider and transmits torque.

[0007] Furthermore, during the threaded movement of the inner slider, there is only one position that matches the phase of the shaft pin. However, the inner slider itself has mass and cannot complete the engagement instantly. It takes a certain period of time from phase matching to completion of engagement, which is called the engagement buffer section.

[0008] Furthermore, in the engagement buffer section, the pin and the inner slider need to remain in a state of constant engagement; otherwise, there is a possibility of slippage. The shape of the pin is machined 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 pin and the inner slider complete engagement.

[0009] Furthermore, when the pin is inserted into the large-lead internal thread outer cylinder at any phase, the inner slider has one and only one position that matches the phase of the pin. The pin pushes the inner slider to move spirally from the cylinder opening along the inner thread of the outer cylinder. After encountering the matching position, the shape of the pin is completely aligned with the hole of the inner slider, and no longer applies a pushing force to the inner slider. The pin inserts and passes through the inner slider, completing the locking of the inner slider. The inner slider itself is self-locked with the outer cylinder through friction. When the pin is pulled out, the inner slider returns to the cylinder opening position of the outer cylinder under the action of the spring, and contacts the limiting sleeve to complete the reset.

[0010] Furthermore, the outer cylinder has internal threads, and the inner slider has external threads. These two threads mesh with each other and are self-locking due to friction during axial rotation. A spring connects the inner slider and the outer cylinder. In the disengaged state, the inner slider is pressed against the cylinder's limiting sleeve by the spring force. The cylindrical section of the pin has an inscribed circle of the polygonal inner hole of the inner slider. When the pin rotates, the cylindrical section rotates within the inner hole of the inner slider, providing a positioning effect but not transmitting torque. During engagement, the pin moves towards the bottom of the outer cylinder. When the phases are mismatched, the prismatic section interferes with the inner hole of the inner slider, and the pin pushes the inner slider. Under the action of the threads, the inner slider rotates while moving axially. When the phases match, the prismatic section does not interfere with the inner slider, the pushing force of the pin on the inner slider disappears, and the inner slider stops moving under the action of the spring, while the pin continues to move, passing through the inner hole of the inner slider. At a given phase, the position of the inner slider within the outer cylinder is uniquely determined, and due to frictional self-locking, there is no relative motion between the inner slider and the outer cylinder when transmitting torque. Because the inner slider can only be in phase with the pin at one specific position during its threaded movement, and because the inner slider itself has mass, it cannot engage instantaneously. Therefore, a period of time is required from phase matching to engagement. A buffer section is designed into the pin's shape. During this buffer section, the pin and inner slider remain in a state of constant engagement, expanding the engagement window and ensuring engagement at a certain pin speed. When the clutch disengages, the inner slider is pushed back to the outer cylinder opening by the spring, completing its automatic reset.

[0011] The advantages of this invention compared to the prior art are as follows:

[0012] This invention automatically matches the phase through the spiral motion of the inner slider in the outer cylinder, enabling engagement at any phase; it transmits torque through a prism structure, allowing for the transmission of a large torque with a small diameter; after the inner slider engages with the shaft pin, frictional self-locking is achieved through the thread angle between the inner slider and the outer cylinder, realizing the overall locking of the clutch without the need for an additional locking device, resulting in a simple structure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall shape of the present invention;

[0014] Figure 2 This is a schematic diagram of the radial cross-section of the meshing state of the present invention;

[0015] Figure 3 This is a schematic diagram of the radial cross-section of the disengaged state of the present invention;

[0016] Figure 4 This is a schematic diagram of the axial cross-section of the meshing state of the present invention;

[0017] Figure 5 This is a schematic cross-sectional view of the outer cylinder of the present invention;

[0018] Figure 6 This is a schematic diagram of the inner slider of the present invention;

[0019] Figure 7 This is a schematic diagram of the shaft pin of the present invention;

[0020] Figure 8 This is a schematic diagram of the pin segmentation of the present invention;

[0021] Among them, 1-outer cylinder, 2-inner slider, 3-shaft pin, 4-limiting sleeve, 5-active ring, 6-spring, 31-cylindrical section, 32-transition section, 33-prismatic section, 34-meshing buffer section. Detailed Implementation

[0022] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the following examples provide a more detailed description of the invention. It should be noted that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0023] like Figures 1-8 As shown, a clutch with arbitrary phase engagement according to the present invention includes a driven, large-lead internally threaded outer cylinder 1, an inner slider 2, a shaft pin 3, a limiting sleeve 4, a driving ring 5, and a spring 6. The outer cylinder, inner slider, shaft pin, and driving ring are all coaxial.

[0024] The active ring 5 and the shaft pin 3 only have relative movement, not relative rotation. The inner slider 2 has a through hole on its inner side that matches the shape of the shaft pin 3, and an externally threaded slider on its outer side that matches the internal thread of the outer cylinder; the two mesh 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, serving as a positioning element when the clutch disengages. The prism section has the same cross-sectional shape as the through hole on the inner side of the inner slider 2, allowing it to transmit torque.

[0025] When the pin 3 is inserted into the large-lead internal thread outer cylinder at any phase, the inner slider 2 has one and only one position that matches the phase of the pin. The pin 3 pushes the inner slider 2 to make a spiral motion from the outer cylinder opening along the inner thread of the outer cylinder. After encountering the matching position, the shape of the pin 3 is completely aligned with the hole of the inner slider 2, and no longer applies a pushing force to the inner slider. The pin 3 inserts and passes through the inner slider, completing the locking of the inner slider 2. The inner slider 2 itself is self-locked with the outer cylinder 1 through friction.

[0026] When the shaft pin 3 is pulled out, the inner slider 2 returns to the opening position of the outer cylinder 1 under the action of the spring 6, and contacts the limiting sleeve 4 to complete the reset. The arbitrary phase engagement clutch provided by this invention automatically matches the phase through the helical motion of the inner slider in the outer cylinder. It has a simple structure and can bear a large torque.

[0027] Because the inner slider 2 has only one position that matches the pin 3 during its threaded motion, and because the inner slider 2 itself has mass, it cannot be instantly engaged. Therefore, a certain period of time is required from phase matching to engagement, which is called the engagement buffer section 34. During the engagement buffer section 34, the pin 3 and the inner slider 2 must remain in a constantly engaging state; otherwise, slippage is possible. Therefore, the shape of the pin 3 is machined to ensure that it can always engage with the inner slider 2 within the engagement buffer section 34. During this stroke, the inner slider 2 decelerates and stops under the action of the spring 6, and the pin 3 and the inner slider 2 complete engagement.

[0028] The outer cylinder 1 has internal threads, and the inner slider 2 has external threads. The two mesh with each other and can self-lock due to friction during axial rotation. There is a spring 6 between the inner sliders 2. When disengaged, the inner slider 2 is pressed against the cylinder opening limit sleeve 4 by the spring 6. The profile of the cylindrical section 31 of the pin 3 is the inscribed circle of the polygonal inner hole of the inner slider 2. When the 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 pin 3 moves towards the bottom of the outer cylinder 1. When the phase is mismatched, the prism section 33 interferes with the inner hole of the inner slider 2, and the pin 3 pushes. The inner slider 2 moves and rotates axially under the action of the thread. When the phase is matched, the prism segment 33 does not interfere with the inner slider 2, the pushing force of the shaft pin 3 on the inner slider 2 disappears, and the inner slider 2 stops moving under the action of the spring 6. The shaft pin 3 continues to move and passes through the inner hole of the inner slider 2. Under 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 disengages, the inner slider 2 is pushed back to the cylinder opening of the outer cylinder 1 by the spring 6, completing the automatic reset.

[0029] Because there is only one position where the inner slider 2 is in phase with the pin 3 during the threaded movement of the inner slider 2, and the inner slider 2 itself has mass, it cannot be engaged instantly. Therefore, it takes a period of time from phase matching to engagement. The engagement buffer section 34 is provided on the outer shape of the pin 3. In the engagement buffer section 34, the pin 3 and the inner slider 2 are always in a state of engagement, which expands the engagement window period and ensures engagement at a certain speed of the pin 3.

[0030] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A clutch capable of arbitrary phase engagement, characterized in that, The clutch includes: Outer cylinder (1), inner slider (2), shaft pin (3), limiting sleeve (4), driving ring (5), spring (6); The inner slider (2) is inside the outer cylinder (1). The inner side of the inner slider (2) has a through hole that matches the shape of the shaft pin (3). The inner slider (2) is a slider with external threads on the outside, which matches the internal threads of the outer cylinder. The two mesh with each other and make a spiral motion through the thread meshing. The spring (6) is fixed at the bottom of the outer cylinder (1) and pushes the inner slider (2) to the limiting sleeve at the top of the outer cylinder (1). The shaft pin (3) is coaxial with the inner slider (2) and can move and rotate axially. The driving ring (5) is coaxial with the shaft pin (3). There is only relative movement between the driving ring (5) and the shaft pin (3), and there is no relative rotation. The shaft pin includes a cylindrical section (31), a transition section (32), and a prism section (33). The cylindrical section (31) is the inscribed circle of the prism section (33) and serves as the positioning when the clutch disengages. The prism section (33) has the same cross-sectional shape as the inner through hole of the inner slider (2) and transmits torque. The outer cylinder (1) has internal threads inside, and the inner slider (2) has external threads on the outside. The two mesh with each other and can self-lock due to friction when rotating axially. There is a spring (6) between the inner slider (2) and the outer cylinder (1). When the slider is disengaged, the inner slider (2) is pressed against the cylinder opening limit sleeve (4) by the spring (6). The outline 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 segment (33) interferes with the inner hole of the inner slider (2). 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 match, the prism segment (33) and the inner slider (2) do not interfere with each other, the pushing force of the pin (3) on the inner slider (2) disappears, and under the action of the spring (6), the inner slider (2) stops moving, while the pin (3) continues to move and passes through the inner hole of the inner slider (2); under 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 motion between the inner slider (2) and the outer cylinder (1); When the clutch disengages, the inner slider (2) is pushed back to the opening of the outer cylinder (1) by the spring (6), completing the automatic reset.

2. A clutch capable of arbitrary phase engagement according to claim 1, characterized in that, In the threaded motion of the inner slider (2), there is only one position that matches the phase of the shaft pin (3). However, 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 engagement, which is called the engagement buffer section, i.e., the engagement buffer section (34).

3. A clutch capable of arbitrary phase engagement according to claim 2, characterized in that, In the engagement buffer section (34), the pin (3) and the inner slider (2) need to be kept in a state of constant engagement, otherwise there is a possibility of slippage; the shape of the pin (3) is processed so that it can always engage with the inner slider (2) in the engagement buffer section (34). During this stroke, the inner slider (2) decelerates and stops under the action of the spring (6), and the pin (3) and the inner slider (2) complete engagement.

4. A clutch capable of arbitrary phase engagement according to claim 1, characterized in that, When the pin (3) is inserted into the outer cylinder (1) at any phase, the inner slider (2) has only one position that matches the phase of the pin (3). The pin (3) pushes the inner slider to make a spiral motion from the opening of the outer cylinder (1) along the inner thread of the outer cylinder. After encountering the matching position, the shape of the pin (3) is completely aligned with the hole of the inner slider (2), and no longer applies a pushing force to the inner slider (2). The pin (3) is inserted and passes through the inner slider (2), completing the locking of the inner slider (2). The inner slider (2) itself is self-locked with the outer cylinder (1) through friction. When the pin (3) is pulled out, the inner slider (2) returns to the opening position of the outer cylinder (1) under the action of the spring (6) and contacts the limiting sleeve (4) to complete the reset.

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