Micro drive decoupling mechanism and cable drum

Abstract

The application relates to a micro transmission disengagement mechanism and a cable reel. The disengagement mechanism comprises a first transmission part, a second transmission part and an adapter part. The adapter part comprises a dial sleeve slidingly arranged on the outer periphery of the front end of the first transmission part and a handle sleeve slidingly arranged on the front end of the cavity of the first transmission part. The handle sleeve and the first transmission part are connected through ball engagement transmission. The dial sleeve has a locking position for pressing the ball between the handle sleeve and the first transmission part and an unlocking position for providing a ring groove for the ball to be separated from the handle sleeve in the sliding stroke of the dial sleeve. A dial spring provides elastic force for the dial sleeve to keep the dial sleeve in the locking position. A handle spring provides elastic force for the handle sleeve to move axially forward to separate the ball. The handle sleeve and the transmission shaft of the second transmission part located in the transmission part cavity are connected in the axial sliding mode and the circumferential rotation stopping mode. The application has simple principle, small volume and light weight, and can meet the volume and weight requirements of portable devices.

Description

Technical Field

[0001] This invention belongs to the field of clutch technology, specifically relating to a miniature transmission disengagement mechanism and a cable reel using the mechanism. Background Technology

[0002] The remote control cable enables data transmission between the remote control box and the vehicle data processor. The communication distance is no less than 150m. The operator needs to carry the cable reel and quickly and smoothly release the 150m fiber optic hybrid cable within 1.5 minutes. At the same time, within 2 minutes, the cable is neatly and quickly wound into the reel to complete the cable retraction. This type of product is equipped with a cable guide, which can drive the cable to quickly retract and extend as a whole.

[0003] However, the field environment is quite complex, including forests, Gobi deserts, shrublands, and hills. When operating the cable reel in the field to reel in and out, if an unexpected situation occurs, the lead screw of the cable guide may get stuck due to mud, sand, branches, or other foreign objects. Since the cable guide and the reel are linked by a synchronous pulley transmission mechanism, the reel will also be unable to rotate, which will prevent the cable assembly from being deployed or retracted. This will seriously affect the time indicators for reeling in and out, and this problem needs to be solved.

[0004] Currently, to achieve neat cable winding and unwinding, a cable guide and a synchronous pulley drive mechanism are added to the cable reel. The synchronous pulley drive mechanism transmits the rotational motion of the cable reel to the cable guide, which then converts the rotational motion into linear reciprocating motion, thereby guiding the overall winding and unwinding of the cable. A schematic diagram of the existing cable reel structure is shown below. Figure 1 As shown, the large and small synchronous pulleys are driven by a synchronous belt. When foreign objects fill the bidirectional lead screw of the cable guide, it causes the cable guide to jam, preventing the pulleys from rotating. Consequently, the cable cannot be unwound or become entangled in the pulley. In an emergency, the synchronous belt must be cut with a tool to disconnect the large and small synchronous pulley components, allowing the pulleys to rotate and enabling the cable to be unwound or retracted, thus completing the immediate emergency task. The cable guide can then be repaired.

[0005] This solution has the following drawbacks:

[0006] 1) When the cable tray gets stuck, the timing belt needs to be cut with a knife. Therefore, the operator is required to carry the knife with them, which is inconvenient. In addition, when repairing the product, in addition to repairing the cable tray, the timing pulley transmission mechanism also needs to be repaired.

[0007] 2) In order to deal with the jamming of the cable guide and to ensure that the cable guide and the cable pulley can be quickly disengaged from the transmission, the timing belt must be able to be cut at any time. Therefore, the entire timing pulley transmission mechanism cannot be equipped with an external protective cover. Considering that the timing belt is made of non-metallic material, its aging speed will be significantly accelerated when exposed to the outdoor environment, which increases the unreliability factor.

[0008] 3) After repeated use and wear, the position of the lead wire on the cable tray may become misaligned with the position of the cable winding in the reel, resulting in uneven cable routing. If the position of the lead wire needs to be adjusted, the entire cable needs to be removed from the reel and then the position of the lead wire needs to be adjusted, which is cumbersome, time-consuming and laborious. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides a miniature transmission disengagement mechanism and a cable reel using this mechanism. The cable reel enables rapid engagement and disengagement of the cable guide and the cable wheel drive. In the event of an malfunction in the cable guide, it can quickly disengage the cable wheel from the cable guide. After the malfunction is resolved, it can quickly re-engage the cable wheel and the cable guide. The operation is simple and convenient, and the performance is stable and reliable.

[0010] The objective of this invention and the technical problem it solves are achieved by the following technical solution. A miniature transmission disengagement mechanism according to this invention includes a first transmission part, a second transmission part, and a transition part. The transition part includes a paddle sleeve slidably disposed on the outer periphery of the front end of the first transmission part and a handwheel sleeve slidably disposed on the front end of the cavity of the first transmission part. The handwheel sleeve and the first transmission part are driven by ball bearing engagement. The paddle sleeve, in its sliding stroke, has a locking position that presses the ball bearing between the handwheel sleeve and the first transmission part, and an unlocking position that provides an annular groove for the ball bearing to disengage from the handwheel sleeve. A paddle spring provides an elastic force to keep the paddle sleeve in the locking position, and a handwheel spring provides an elastic force to move the handwheel sleeve axially forward to disengage the ball bearing. The handwheel sleeve is axially slidably and circumferentially anti-rotatingly connected to the transmission shaft of the second transmission part located within the cavity of the transmission part.

[0011] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0012] In the aforementioned micro transmission disengagement mechanism, when the paddle sleeve is in the locked position, it is stopped and limited by the paddle sleeve shaft end retaining ring located on the outer periphery of the first transmission part.

[0013] The aforementioned micro transmission disengagement mechanism has an inner protrusion inside the cavity of the first transmission part for blocking and engaging with the stepped surface of the outer periphery of the handwheel sleeve to prevent the handwheel sleeve from disengaging from the outer periphery of the first transmission part.

[0014] In the aforementioned micro transmission disengagement mechanism, the outer periphery of the handwheel sleeve is a stepped shaft structure, and the outer periphery of the large-diameter end of the rear end of the stepped shaft structure is provided with multiple spherical grooves for fitting the ball bearings at intervals; the first transmission part is provided with a corresponding cylindrical hole in the circumference, and the ball bearings are provided in the cylindrical hole.

[0015] In the aforementioned micro-transmission disengagement mechanism, the small-diameter end of the handwheel sleeve extends out of the first transmission part and is connected to a handwheel for easy application of force.

[0016] In the aforementioned micro-transmission disengagement mechanism, the handwheel and the handwheel sleeve are circumferentially anti-rotation connected to facilitate adjustment of the position between the spherical groove and the cylindrical hole.

[0017] In the aforementioned micro transmission disengagement mechanism, the paddle sleeve has a stepped hole structure that is smaller at the front and larger at the back. The annular groove is located on the inner wall of the small hole at the front end, and a paddle is also provided on the outer periphery of the small hole to facilitate the application of force.

[0018] In the aforementioned micro-transmission disengagement mechanism, the paddle spring is located between the large-diameter end of the paddle sleeve and the annular groove on the first transmission part, and the paddle sleeve is guided and engaged with the annular groove throughout the entire stroke.

[0019] The aforementioned micro transmission disengagement mechanism includes a first transmission component and an adapter sleeve that are axially fixed together. A mounting plate is rotatably disposed between the first transmission component and the adapter sleeve. The mounting plate is used to fix the device.

[0020] The objective of this invention and the solution to its technical problems are also achieved by the following technical solutions. According to this invention, a cable reel with the aforementioned micro-transmission disengagement mechanism is provided, wherein the micro-transmission disengagement mechanism is fixed to the cable reel support by a mounting plate; the second transmission part is a bidirectional lead screw for moving the lead wire, which is axially rotated on the cable reel support via rolling; the first transmission part is used to drive the reel to rotate to achieve the function of taking in the wire.

[0021] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0022] The aforementioned cable reel, wherein the first transmission mechanism includes a large synchronous pulley, which is synchronously driven with a small synchronous pulley at the cable reel via a conveyor belt or conveyor chain, and the cable reel support is also fixed with a protective cover to prevent damage to the synchronous transmission mechanism.

[0023] Compared with existing technologies, this invention has significant advantages and beneficial effects. Through the above technical solution, this invention achieves considerable technological advancement and practicality, and has broad industrial application value, possessing at least the following advantages:

[0024] 1) A spherical groove and a trapezoidal annular groove are respectively set on the handwheel sleeve and the paddle sleeve. The steel ball can switch between the upper and lower positions in the cylindrical hole of the large synchronous pulley through the action of two sets of springs and sleeves, thereby realizing the engagement and disengagement of the transmission. The clutch mechanism has a simple principle, small size and light weight, which can well meet the size and weight requirements of portable devices.

[0025] 2) The use of circumferentially distributed steel balls to transmit torque enables the transmission of large torques. The structure is stable and reliable. Furthermore, the steel balls are hidden inside the shell, which effectively reduces the intrusion of dust and gravel, greatly improving reliability and meeting the requirements of vibration environments such as vehicle-mounted environments.

[0026] 3) The engagement and disengagement operation of the micro transmission disengagement mechanism is simple and can be operated blindly, requiring only pushing and pulling, and requires little operating space;

[0027] 4) Through structural integration with the large synchronous pulley, a modular design is achieved, and the clutch and cable guide are connected without mechanical fastening, improving the maintainability of the product;

[0028] 5) When the micro transmission disengagement mechanism switches between the two states, it makes a 'click' sound, accompanied by a change in the relative gap between the spring action lever and the handwheel, making it very easy to identify the state of the micro transmission disengagement mechanism.

[0029] This invention's cable reel integrates a micro-transmission disengagement mechanism with a large synchronous pulley component. The mechanism is integrated onto the large synchronous pulley component and connected to a bidirectional lead screw via a keyway. A protective cover is added to the outside of the synchronous pulley transmission mechanism. In the event of a malfunction in the cable guide, the reel and cable guide can be quickly disengaged from the transmission. After the malfunction is resolved, the reel and cable guide can be quickly re-engaged. Its operation is simple and convenient, and its performance is stable and reliable. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the existing cable reel structure;

[0031] Figure 2 This is a schematic diagram of the micro transmission disengagement mechanism of the present invention;

[0032] Figure 3 for Figure 2 The main view;

[0033] Figure 4 This is a schematic diagram of the cable reel structure of the present invention;

[0034] Figure 5 for Figure 4 Partial sectional view;

[0035] Figure 6 This is a schematic diagram of the handwheel sleeve structure;

[0036] Figure 7 This is a schematic diagram of the large synchronous pulley structure;

[0037] Figure 8 This is a schematic diagram of the paddle sleeve.

[0038] [Explanation of Key Component Symbols]

[0039] 01: Miniature transmission disengagement mechanism

[0040] 02: Lead wire

[0041] 03: Synchronous transmission mechanism

[0042] 1: Second transmission section

[0043] 101: Load side

[0044] 102: Drive shaft

[0045] 2: Guide rod

[0046] 3: Fasteners

[0047] 4: Rolling bearings

[0048] 5: Adapter sleeve

[0049] 6: Mounting plate

[0050] 7: First transmission component

[0051] 8: Handwheel spring

[0052] 9: Paddle spring

[0053] 10: Paddle Sleeve

[0054] 11: Pick

[0055] 12: Handwheel

[0056] 13: Ball bearing

[0057] 14: Handwheel socket

[0058] 15: Washers

[0059] 16: Handwheel fasteners

[0060] 17: Retaining ring at the end of the paddle sleeve shaft

[0061] 18: Paddle shifter shaft end retaining ring

[0062] 19: Outer protective cover

[0063] 20: Inner protective cover

[0064] 21: Cable reel support

[0065] 22: Inner protrusion

[0066] 23: Stepped surface

[0067] 24: Spherical groove

[0068] 25: Cylindrical hole

[0069] 26: Annular groove

[0070] 27: Fixing slot

[0071] 28: Stepped surface Detailed Implementation

[0072] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description of the specific implementation, structure, features and effects of the micro transmission disengagement mechanism proposed according to the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0073] Please see Figure 1-8 This invention discloses a miniature transmission disengagement mechanism, which includes a first transmission part, a second transmission part, and a transition part. The first transmission part and the second transmission part 1 are coaxially arranged, and the second transmission part 1 is divided into a load end 101 and a transmission shaft 102 along its axial direction. The transmission shaft 102 passes through a cavity extending axially in the first transmission part and is clearance-fitted with the first transmission part. The transition part includes a paddle sleeve 10 slidably disposed on the outer periphery of the front end of the first transmission part and a handwheel sleeve 14 slidably disposed on the front end of the cavity extending axially in the first transmission part. A paddle spring 9 is also provided between the paddle sleeve 10 and the protruding surface of the outer periphery of the first transmission part. The paddle spring 9 provides the paddle sleeve 10 with the power to move it forward along the axial direction of the first transmission part. A groove is also provided on the outer periphery of the front end of the first transmission part, and a paddle sleeve shaft end retaining ring 17 is fixed in the groove. The paddle sleeve 10 is pressed against the paddle sleeve shaft end retaining ring 17 by the paddle spring 9.

[0074] One end of the handwheel sleeve 14 extends out of the front end of the cavity of the first transmission part, and the other end is axially sliding and circumferentially anti-rotatingly connected to the transmission shaft 102 of the second transmission part. The load end 101 of the second transmission part extends out of the first transmission part for connection with the load or power part. A handwheel spring 8 is provided between the transmission shaft 102 of the first or second transmission part and the handwheel sleeve 14. The handwheel spring 8 provides an elastic force to the handwheel sleeve 14, causing it to slide away from the end of the transmission shaft 102 of the second transmission part. An inner protrusion 22 is formed on the inner wall of the cavity of the first transmission part. The inner protrusion 22 cooperates with the stepped surface 23 on the outer periphery of the handwheel sleeve 14 to stop the axial forward sliding of the handwheel sleeve 14.

[0075] In this embodiment, the outer periphery of the handwheel sleeve 14 is a stepped shaft structure, which includes a small diameter end at the front end and a large diameter end at the rear end, wherein a stepped surface 23 is formed at the connection between the small diameter end and the large diameter end, and the large diameter end is clearance-fitted with the first transmission part.

[0076] The handwheel sleeve 14 and the first transmission part are engaged circumferentially to prevent rotation and transmit torque via balls 13. Specifically, the outer circumference of the large-diameter end of the handwheel sleeve 14 is provided with a plurality of spherical grooves 24 spaced apart circumferentially, and the first transmission part is provided with a plurality of cylindrical holes 25 spaced apart circumferentially to accommodate the balls 13, and the cylindrical holes extend radially along the handwheel sleeve 14 with an extension length less than the diameter of the balls 13; when the cylindrical holes 25 correspond to the spherical grooves 24, the balls 13 are partially located in the spherical grooves 24 and partially located in the cylindrical holes 25, realizing the meshing transmission between the handwheel sleeve 14 and the first transmission part. Preferably, there are 8 balls 13 evenly distributed circumferentially, but it is not limited to this. Preferably, the cylindrical hole 25 is designed to be tapered at the end facing the handwheel sleeve 14 to prevent the ball bearing inside from coming out of the end before the handwheel sleeve 14 is assembled. However, the tapered structure does not affect the engagement of the ball bearing with the handwheel sleeve.

[0077] When the handwheel sleeve 14 and the first transmission part are engaged by the ball bearing 13, the inner wall of the paddle sleeve 10 has a clearance fit with the outer circumference of the portion of the first transmission part with the cylindrical hole 25, to prevent the ball bearing 13 from disengaging from above the cylindrical hole 25 and affecting the transmission. Preferably, at this time, the inner wall of the paddle sleeve 10 has a small clearance fit with the ball bearing 13, that is, the sum of the length of the cylindrical hole 25 and the depth of the spherical groove 24 is slightly greater than the diameter of the ball bearing 13, so that the ball bearing 13 can roll freely while achieving a circumferential anti-rotation fit between the handwheel sleeve 14 and the first transmission part.

[0078] The paddle sleeve 10 is also provided with an annular groove 26 for avoiding the balls that dislodge from the spherical groove 24. When the paddle sleeve 10 is stopped by the paddle sleeve shaft end retaining ring 17, the annular groove 26 is between the cylindrical hole 25 on the first transmission part and the groove of the paddle sleeve shaft end retaining ring 17. When the paddle sleeve 10 is pushed axially backward, the annular groove 26 in the paddle sleeve 10 can move to the position corresponding to the cylindrical hole 25. At this time, the handwheel spring 8 Driven by the handwheel spring 8, the handwheel sleeve compresses the ball bearing 13, causing it to disengage from the spherical groove 24 and partially exit through the cylindrical hole 25 into the annular groove 26. When the ball bearing 13 is completely disengaged from the spherical groove 24, the handwheel sleeve 14 moves axially forward under the push of the handwheel spring 8, completely disengaging the spherical groove 24 from the cylindrical hole 25. The inner protrusion 22 on the first transmission part engages with the stepped surface 23 on the handwheel sleeve 14 to limit movement and prevent excessive movement of the handwheel sleeve 14. Preferably, the annular groove 26 is a trapezoidal annular groove, but it is not limited to this.

[0079] In this embodiment, when the first transmission part and the second transmission part need to transmit torque through the transition part, the handwheel sleeve 14 is pushed so that the spherical groove 24 on its outer periphery corresponds to the cylindrical hole 25 of the first transmission part, so that the ball 13 enters the spherical groove, thereby preventing the first transmission part and the handwheel sleeve 14 from rotating axially. At this time, the paddle sleeve 10 is pressed by the paddle spring 9 at the paddle sleeve shaft end retaining ring 17, and the inner wall of the paddle sleeve 10 at the position corresponding to the cylindrical hole 25 is in clearance fit with the ball 13 to prevent it from dislodging from the spherical groove 24 and to ensure the reliability of the transmission.

[0080] When the first transmission part and the second transmission part need to be disengaged, simply push the paddle sleeve 10 backward so that the annular groove 26 inside the paddle sleeve 10 moves to the cylindrical hole 25. The ball 13 is pushed by the handwheel spring 8 and the handwheel sleeve 14 to disengage from the spherical groove 24 and enter the annular groove 26. At this time, the first transmission part and the handwheel sleeve 14 are released from circumferential anti-rotation, thereby stopping the torque transmission between the first transmission part and the second transmission part.

[0081] In this embodiment, the paddle sleeve 10 has a stepped hole structure, including a small hole at the front end and a large hole at the rear end. The inner wall of the small hole end is in clearance fit with the first transmission part, and the annular groove 26 is located on the inner wall of the small hole end. The paddle spring 9 is located between the outer peripheral protruding surface of the first transmission part and the large hole end of the paddle sleeve 10, and is pressed against the stepped surface formed by the large hole end and the small hole end.

[0082] In this embodiment, a paddle 11 is also provided on the outer periphery of the small hole end of the paddle sleeve 10. When the first transmission part and the second transmission part need to disengage, the paddle sleeve 10 is pushed by pushing the paddle 11. The paddle 11 can be fixed to the paddle sleeve 10 by a corresponding fixing structure, or it can be a protruding force-applying part formed on the outer periphery of the paddle sleeve 10. In this embodiment, the paddle 11 is pressed and fixed to the stepped surface 28 of the paddle sleeve 10 by the paddle shaft end retaining ring 18. The outer periphery of the paddle sleeve 10 is provided with a fixing groove 27, and the paddle shaft end retaining ring 18 is fixed to the paddle sleeve 10 through the fixing groove 27. Preferably, the stepped surface 27 is formed by the flatness of the outer periphery of the paddle sleeve 10, and the paddle 11 is also provided with a flat surface that matches the flatness of the outer periphery of the paddle sleeve 10 to achieve a circumferential anti-rotation fit between the two, but it is not limited to this.

[0083] In this embodiment, the first transmission part includes a first transmission member 7 and an adapter sleeve 5. The adapter sleeve 5 is connected to the rear end of the first transmission member 7 via an external thread, and the first transmission member 7 is in clearance fit with the outer circumference of the large-diameter end of the handwheel sleeve 14. The adapter sleeve 5 is in clearance fit with the outer circumference of the transmission shaft 102 of the second transmission part, and the handwheel spring 8 is located between the front end of the adapter sleeve 5 and the front end of the handwheel sleeve 14. In other embodiments, the handwheel spring 8 may also be located between the outer circumference protrusion of the transmission shaft 102 and the handwheel sleeve 14.

[0084] In this embodiment, the drive shaft 102 achieves axial sliding and circumferential anti-rotation by engaging with the waist-shaped section shaft at its front end and the waist-shaped hole 29 at the rear end of the handwheel sleeve 14. Preferably, the handwheel sleeve 14 remains connected to the drive shaft 102 throughout the entire axial sliding stroke. Preferably, the waist-shaped hole 29 is a blind hole, and the other end of the handwheel sleeve 14 extends out of the first transmission member 7 and is connected to a handwheel 12 for easy force application. In this embodiment, the handwheel 12 is pressed and fixed onto the handwheel sleeve 14 by the handwheel fastener 16 and the washer 15. Specifically, the handwheel 12 achieves circumferential anti-rotation and axial rearward limiting by engaging with the flat structure 30 on the outer periphery of the handwheel sleeve 14. The handwheel fastener 16 presses the handwheel 12 against the stepped surface formed on the flat structure 30 on the outer periphery of the handwheel sleeve 14 by the washer 15. In other embodiments of the present invention, the handwheel 12 may be directly fixed to the handwheel sleeve 14 by threads, but is not limited thereto.

[0085] In this embodiment, the load end 101 is a bidirectional lead screw, but in other embodiments, the load end 101 may also be a gear, a timing pulley, a sprocket, etc.

[0086] In this embodiment, the outer periphery of the first transmission member 7 is a stepped shaft structure, with its front end being a small-diameter end that mates with the paddle sleeve 10, and its rear end being a large-diameter end that mates with other components for transmission. Preferably, the first transmission member 7 is also provided with an annular groove 31 for guiding engagement with the paddle sleeve 10, and the paddle sleeve 10 is in guiding contact with the groove wall of the annular groove 31 throughout its axial movement stroke. The paddle spring 9 is pressed against the bottom of the annular groove 31.

[0087] The first transmission component 7 can be a synchronous pulley, gear, sprocket, or other transmission structure. In this embodiment, the first transmission component 7 is a large synchronous pulley, and the outer circumference of the large-diameter end of the rear end of the large synchronous pulley has teeth distributed for engaging with the synchronous belt. To prevent the synchronous belt from shifting axially along the large synchronous pulley during transmission, baffles 32 are fixed on both sides of the large-diameter end of the large synchronous pulley.

[0088] In this embodiment, a mounting plate 6 is rotatably disposed between the adapter sleeve 5 and the large synchronous wheel. The mounting plate 6, the adapter sleeve 5, and the large synchronous wheel are all in a small clearance fit so that the adapter sleeve and the large synchronous wheel can rotate relative to the mounting plate. The mounting plate 6 is provided with multiple threaded mounting holes. The micro transmission disengagement mechanism is fixed on the equipment through the mounting plate 6.

[0089] The drive shaft 102 is rotatably mounted on the equipment via a rolling bearing 4. Preferably, the drive shaft 102 has a stepped shaft structure with a smaller front diameter and a larger rear diameter, and its larger diameter end mates with the rolling bearing 4. The adapter sleeve 5 has a clearance fit with the smaller diameter end of the drive shaft 102, and the rear end face of the adapter sleeve 5 engages with the stepped surface formed at the diameter change of the drive shaft 102 and the front end face of the inner ring of the rolling bearing 4. The rear end face of the inner ring of the rolling bearing 4 is stopped and limited by the stepped surface formed at the connection between the load end 101 and the drive shaft 102. The inner ring of the rolling bearing 4 is pressed onto the equipment by a retaining ring 33.

[0090] The present invention also provides a cable reel using the aforementioned micro-transmission disengagement mechanism, which is fixed to the cable reel bracket 21 by a mounting plate 6. In this case, the first transmission component 7 is a large synchronous pulley, and the load end 101 of the second transmission part is a bidirectional lead screw, on which a lead screw 02 is connected. The large synchronous pulley is synchronously driven with a small synchronous pulley on the cable reel bracket 21 via a transmission belt or conveyor chain. The small synchronous pulley is used to drive the spool 04 to rotate to achieve the winding and unwinding function.

[0091] A protective cover is also fixed to the cable reel. This cover can cover the synchronous transmission mechanism 03, which consists of a large synchronous pulley and a small synchronous pulley, as well as the micro transmission disengagement mechanism. The bidirectional lead screw, lever, and handwheel sleeve all extend out of the protective cover. Preferably, the protective cover is a two-piece snap-fit ​​structure consisting of an outer protective cover 19 and an inner protective cover 20. The inner protective cover 20 is fixed to the cable reel support, and the outer protective cover 19 is fixed to the inner protective cover 20.

[0092] The working principle of the transmission mechanism on the cable reel of this invention is described in detail below:

[0093] Figure 5In the state where the first transmission part and the second transmission part of the present invention are engaged through the transition part, the ball 13 falls completely into the cylindrical hole 25 of the large synchronous pulley and sinks into the spherical groove 24 of the handwheel sleeve 14. At the same time, the top of the ball is limited by the inner cylindrical surface of the paddle sleeve 10 to keep the ball in this state. When the large synchronous pulley rotates, it will transmit the torque to the handwheel sleeve 14 through the ball and the spherical groove 24 of the handwheel sleeve 14. The handwheel sleeve 14 transmits the torque to the bidirectional lead screw through the waist-shaped hole 29 and the waist-shaped section shaft of the transmission shaft 102, thereby driving the bidirectional lead screw to rotate and the cable guide 02 to work normally. Push the paddle 11 towards the large synchronous pulley. When the trapezoidal annular groove of the paddle sleeve 10 moves above the ball 13, the ball 13 enters the trapezoidal annular groove of the paddle sleeve 10 under the thrust of the handwheel spring 8 and the handwheel sleeve 14. At the same time, the ball disengages from the spherical groove 24 of the handwheel sleeve 14. The handwheel sleeve 14 moves forward under the action of the handwheel spring 8, which in turn moves the handwheel 12 forward. At this time, the ball 13 remains in the state of entering the paddle sleeve 10. As a result, the large synchronous pulley is disengaged from the handwheel sleeve 14 and cannot transmit torque. The transmission mechanism is in a disengaged state.

[0094] When engagement is required, push the handwheel 12 towards the large synchronous pulley until it is below the ball bearing 13. Figure 5 The ball bearings are positioned such that, under the action of the paddle spring 8 and the paddle sleeve 10, they enter the spherical groove 24 of the handwheel sleeve 14 (because there are 8 spherical grooves 24 evenly distributed on the outer circumference of the handwheel sleeve 14, the handwheel 12 needs to rotate while pushing towards the large synchronous pulley to align the ball bearings with the spherical grooves 24). The paddle sleeve 10, together with the paddle 11, moves towards the handwheel 12 under the push of the paddle spring 9, so that the ball bearings remain in the spherical groove 24 of the handwheel sleeve 14. The large synchronous pulley and the handwheel sleeve 14 can transmit torque through the meshing of the steel balls, and the transmission mechanism is in the meshing state.

[0095] When the cable guide and the large synchronous pulley need to disengage from the transmission, this invention allows for disengagement by simply moving the lever 11 towards the lead screw. A "click" sound is heard when disengaged, and the handwheel 12 pops outward, facilitating subsequent rotation of the handwheel 12 to drive the reciprocating lead screw and adjust the position of the lead wire holder on the lead screw. The operation is simple and quick. After the actuator has been replaced or foreign objects have been cleaned from the lead screw, to reset the cable guide and synchronous pulley transmission mechanism, press the handwheel towards the lead screw and rotate it approximately 45°. A "click" sound will be heard, and the lever will pop outward, approaching or even touching the handwheel. This indicates that the cable guide's lead screw and the synchronous belt transmission mechanism have engaged.

[0096] The miniature transmission disengagement mechanism of this invention can also be used in other devices that transmit torque, enabling the cessation and continuation of torque transmission to meet different usage requirements.

[0097] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A miniature transmission disengagement mechanism, characterized in that: The system includes a first transmission part, a second transmission part, and a transition part. The transition part includes a paddle sleeve slidably disposed on the outer periphery of the front end of the first transmission part and a handwheel sleeve slidably disposed on the front end of the cavity of the first transmission part. The handwheel sleeve and the first transmission part are driven by ball joints. The paddle sleeve has a locking position that presses the ball between the handwheel sleeve and the first transmission part and an unlocking position that provides an annular groove for the ball to disengage from the handwheel sleeve during its sliding stroke. A paddle spring provides an elastic force to keep the paddle sleeve in the locking position, and a handwheel spring provides an elastic force to move the handwheel sleeve axially forward to disengage the ball. The handwheel sleeve is axially slidably and circumferentially anti-rotationally connected to the transmission shaft of the second transmission part located in the cavity of the transmission part. The cavity of the first transmission part has an inner protrusion for blocking engagement with the stepped surface of the outer periphery of the handwheel sleeve to prevent the handwheel sleeve from disengaging from the first transmission part.

2. The miniature transmission disengagement mechanism according to claim 1, characterized in that: When the paddle sleeve is in the locked position, it is stopped and limited by the paddle sleeve shaft end retaining ring located on the outer periphery of the first transmission part.

3. The miniature transmission disengagement mechanism according to claim 1, characterized in that: The outer periphery of the handwheel sleeve is a stepped shaft structure, and the outer periphery of the large-diameter end of the rear end of the stepped shaft structure is provided with multiple spherical grooves for fitting the ball bearings at intervals; the first transmission part is provided with a corresponding cylindrical hole in the circumference, and the ball bearings are provided in the cylindrical hole.

4. The miniature transmission disengagement mechanism according to claim 3, characterized in that: The small-diameter end of the handwheel sleeve extends out of the first transmission part and is connected to a handwheel for easy application of force.

5. The miniature transmission disengagement mechanism according to claim 4, characterized in that: The handwheel and handwheel sleeve are circumferentially anti-rotation connected to facilitate adjustment of the position between the spherical groove and the cylindrical hole.

6. The miniature transmission disengagement mechanism according to claim 3, characterized in that: The paddle sleeve has a stepped hole structure that is smaller at the front and larger at the back. The annular groove is located on the inner wall of the small hole at the front end, and a paddle is also provided on the outer periphery of the small hole end to facilitate the application of force.

7. The miniature transmission disengagement mechanism according to claim 6, characterized in that: The paddle spring is located between the large-diameter end of the paddle sleeve and the annular groove on the first transmission part, and the paddle sleeve is guided and engaged with the annular groove throughout the entire movement stroke.

8. The miniature transmission disengagement mechanism according to any one of claims 1-7, characterized in that: The first transmission part includes a first transmission component and an adapter sleeve that are axially fixed together. A mounting plate is also rotatably disposed between the first transmission component and the adapter sleeve. The mounting plate is used to fix the device.

9. A cable reel having the micro-transmission disengagement mechanism according to any one of claims 1-8, characterized in that: The micro transmission disengagement mechanism is fixed to the cable reel bracket by a mounting plate; the second transmission part is a bidirectional lead screw for moving the lead wire, which is mounted on the cable reel bracket by rolling axial rotation; the first transmission part is used to drive the wire wheel to rotate to realize the wire take-up function.

10. The cable reel according to claim 9, characterized in that: The first transmission part includes a large synchronous pulley, which is synchronously driven with a small synchronous pulley at the cable reel via a conveyor belt or conveyor chain, and the cable reel bracket is also fixed with a protective cover to prevent damage to the synchronous transmission mechanism.

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