Clutch structure for gear system

Abstract

The utility model discloses a clutch structure for a gear system, relates to the technical field of gear transmission, and solves the problems that the clutch function of a clutch mechanism in the prior art mainly depends on the action of a spring, and the reliability of the clutch mechanism is easy to reduce after the clutch mechanism is used for a long time. The device comprises a driving gear rotationally arranged on a supporting body and an arc-shaped slide way fixedly arranged on the supporting body, the axis of the arc-shaped slide way coincides with the axis of the driving gear, and a clutch gear meshed with the driving gear is arranged on the arc-shaped slide way in a sliding mode. A pair of driven gears are arranged on the supporting body and correspond to the two ends of the arc-shaped sliding way, when the clutch gear slides to the end of the arc-shaped sliding way, the clutch gear can be meshed with one of the driven gears, and the two driven gears are both meshed with the output gear. The arc-shaped slide way provides movement guidance for meshing and separation of the clutch gear and the driven gear, the clutch function and the transmission function are achieved, parts such as a spring and a magnet which are poor in reliability in the prior art are not needed, and the clutch is suitable for being used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of gear transmission, in particular to a clutch structure used in a gear system. Background Art

[0002] In traditional clutch devices, friction plates, springs, electromagnetic coils and other mechanisms are usually used to achieve the clutch function. However, these traditional methods often have certain limitations. For example, friction plates are easy to wear, springs are easy to fatigue, and electromagnetic coils require a large current. Therefore, these components are prone to clutch performance degradation or even failure during long-term use. In addition, in some scenarios, a complete clutch is not required, and a mechanical clutch structure can achieve the required functions, resulting in a certain waste of resources. In addition, traditional clutches generally cannot support manual internal operations from the output end, which makes it very troublesome to use in scenarios where manual switching is often required.

[0003] For example, the Chinese invention patent with publication number CN110043635A discloses a clutch gear reduction box, including a box shell, a motor, a first double gear, a transmission mechanism and a clutch gear assembly, the motor is installed on the box shell, and a connecting shaft is fixedly installed on the box shell, and the first double gear is rotatably installed on the connecting shaft, and the first double gear includes an integrally formed first gear and a second gear; the clutch gear assembly includes a pin, a clutch bracket, a compression spring and a clutch gear; the second gear is meshed with the clutch gear to drive the clutch gear to rotate around the center line of the nail rod and around the center line of the connecting shaft, and a limited position boss is provided on the box shell; an output shaft is rotatably installed on the box shell, and an output gear that can be meshed and separated with the clutch gear is fixedly installed on the output shaft. In this invention, the realization of the clutch process also requires the participation of the compression spring, so metal fatigue and reduced reliability will occur after long-term use. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a clutch structure for a gear system, which solves the problem that the clutch mechanism in the prior art mainly relies on the action of a spring to realize the clutch function, and is prone to reduced reliability after long-term use.

[0005] The technical solution of the utility model is implemented as follows: a clutch structure for a gear system, including a driving gear rotatably arranged on a support body and an arc-shaped slideway fixedly arranged on the support body, the axis of the arc-shaped slideway coincides with the axis of the driving gear, a clutch gear meshing with the driving gear is slidably provided on the arc-shaped slideway, a pair of driven gears are provided on the support body corresponding to the two ends of the arc-shaped slideway, and when the clutch gear slides to the end of the arc-shaped slideway, it can mesh with one of the driven gears, and both driven gears are meshed with the output gear.

[0006] Preferably, when the clutch gear is located in the middle of the arc-shaped slideway, the sum of the addendum circle radius of the clutch gear and the addendum circle radius of the output gear is smaller than the distance between the clutch gear axis and the output gear axis.

[0007] Preferably, the arc-shaped slideway is an arc-shaped slide groove, the clutch gear is coaxially fixed on the slide rod, a bearing is provided at the end of the slide rod, the bearing is provided in the arc-shaped slide groove and can move in the arc-shaped slide groove, and the width of the arc-shaped slide groove is 4-15 mm.

[0008] Preferably, the arc-shaped slideway is an arc-shaped slide rail, a slider is slidably provided on the arc-shaped slide rail, a bearing is provided on the slider, the outer ring of the bearing is fixedly connected to the slider, the inner ring of the bearing is fixedly connected to the end of the slide rod, and the clutch gear is coaxially fixedly arranged on the slide rod.

[0009] Preferably, the minimum distance from the side wall of the slide rod to the axis of the driving gear is greater than the distance from the outermost end of the driving gear to the axis of the driving gear.

[0010] Furthermore, the transmission ratio between the driving gear and the clutch gear is greater than 1, and the transmission ratio between the driven gear and the output gear is greater than 1. The transmission ratio between the clutch gear and the driven gear is less than 1.

[0011] Preferably, the driving gear is a double gear, and the clutch gear, driven gear and output gear are all spur gears.

[0012] Preferably, the support body is a box structure, and a pair of arc-shaped slideways are symmetrically arranged on the upper and lower side walls of the support body.

[0013] The beneficial effects of the utility model are as follows: by setting the clutch gear and the driven gear, the transmission between the driving gear and the output gear is realized, and by slidably setting the clutch gear on the arc-shaped slideway, the clutch gear can move to the two ends of the arc-shaped slideway with the forward or reverse rotation of the driving gear, and respectively mesh with different driven gears to realize transmission. The utility model provides the clutch gear with a moving guide for meshing and separating with the driven gear through the arc-shaped slideway, realizes the clutch function and the transmission function, and does not require the components with poor reliability such as springs and magnetic attraction in the prior art, and provides a reliable and simple clutch structure suitable for long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the clutch gear of the utility model not meshing with the driven gear;

[0016] Figure 2 This is a schematic diagram of the meshing state of the clutch gear and the driven gear of the utility model;

[0017] In the figure: 1: driving gear, 2: arc-shaped slideway, 3: clutch gear, 4: driven gear, 5: output gear, 6: slide rod, 7: bearing. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 , 2 As shown, in embodiment 1, a clutch structure for a gear system comprises a driving gear 1 rotatably arranged on a support body and a circular arc slideway 2 fixedly arranged on the support body, the axis of the circular arc slideway 2 coincides with the axis of the driving gear 1, a clutch gear 3 meshing with the driving gear 1 is slidably arranged on the circular arc slideway 2, and a pair of driven gears 4 are arranged on the support body corresponding to the two ends of the circular arc slideway 2, and both driven gears 4 are meshed with the output gear 5. In this embodiment, the two driven gears have the same size, and are symmetrical about the perpendicular bisector of the line connecting the two end points of the circular arc slideway. When the clutch gear 3 slides to the end of the circular arc slideway 2, it can mesh with one of the driven gears 4, thereby realizing the transmission connection from the driving gear to the driven gear through the clutch gear 3.

[0020] In this embodiment, when the clutch gear 3 is located in the middle of the circular arc slide 2, the sum of the top circle radius of the clutch gear 3 and the top circle radius of the output gear 5 is smaller than the distance between the axis of the clutch gear 3 and the axis of the output gear 5, thereby avoiding the problem of collision between the clutch gear 3 and the output gear 5 when the clutch gear 3 slides on the circular arc slide 2, thereby improving reliability.

[0021] As a further implementation, in this embodiment, the transmission ratio between the driving gear 1 and the clutch gear 3 is greater than 1, and the transmission ratio between the driven gear 4 and the output gear 5 is greater than 1. Thus, the clutch structure can be transmitted in a decelerated form, reducing the driving force requirement for the driving gear, and saving more effort during forward driving.

[0022] As a further implementation, in this embodiment, the driving gear 1 is a double gear, and the clutch gear 3, the driven gear 4, and the output gear 5 are all spur gears. In addition, the transmission ratio of the clutch gear 3 to the driven gear 4 is less than 1, so that the output gear size can be designed to be larger, the driven gear size can be reduced, and the width between the outermost ends of the two driven gears can be reduced, thereby reducing the space occupied by the entire clutch mechanism and making the whole more compact.

[0023] As a further optional implementation, the support body in this embodiment is a conventional box structure, which mainly serves to provide a supporting foundation. A pair of arc-shaped slideways 2 are symmetrically arranged on the upper and lower side walls of the support body. The support body is provided with a through hole for the gear shaft of the output gear 5 to pass through, so that the output of force is realized outward through the gear shaft of the output gear. In actual use, the driving gear 1 can be directly coaxially arranged with the output shaft of the existing driving motor or the existing driving shaft, or the driving gear can be rotated on the support body through the gear shaft, and a gear is arranged on the output shaft of the existing driving motor or the existing driving shaft, and the gear is meshed with the first-stage gear of the driving gear for transmission, and then the second-stage gear of the driving gear is reduced and transmitted to the clutch gear for output.

[0024] When this embodiment is used, Figure 2 As shown, during normal operation, the driving gear 1 rotates forward, and the meshing action first drives the clutch gear 3 to slide to one end along the arc-shaped slideway 2, so that the clutch gear 3 and one of the driven gears 4 mesh at one end of the arc-shaped slideway 2 to form a transmission connection. The clutch gear rotates, and synchronously drives the driven gear 4 and the output gear 5 to rotate. When the driving gear 1 rotates in the reverse direction, it drives the clutch gear 3 to move along the arc-shaped slideway 2 to the other end until the clutch gear 3 and the driven gear 4 mesh at the other end, realizing the switching of the meshing position and meeting the transmission purpose. When the output gear 5 is subjected to external force, it drives the driven gear 4 to rotate in the reverse direction, and the clutch gear 3 is moved to make it slide along the arc-shaped slideway 2 toward the middle of the arc-shaped slideway 2, so that the meshing state of the clutch gear 3 and the driven gear 4 is disconnected, avoiding the jamming between the gears caused by external force, and achieving the purpose of clutch control. The gears used in this structure are all conventional gears, which are simple to manufacture, compact and reasonable in structure, and can reduce production costs. At the same time, the clutch control process is rapid and reliable, and it is suitable for long-term use.

[0025] Embodiment 2, on the basis of embodiment 1, the arc-shaped slideway 2 is an arc-shaped slot, the clutch gear 3 is coaxially fixedly arranged on the slide rod 6, the end of the slide rod 6 is provided with a bearing 7, the bearing 7 is arranged in the arc-shaped slot and can move in the arc-shaped slot. In this embodiment, the width of the arc-shaped slot is 4-15 mm, the inner ring of the bearing is fixedly connected to the end of the slide rod 6, the outer ring gear of the bearing is slightly smaller than the width of the arc-shaped slot, and the outer ring can slide or roll along the inner wall of the arc-shaped slot. The minimum distance from the side wall of the slide rod 6 to the axis of the drive gear 1 is greater than the distance from the outermost end of the drive gear 1 to the axis of the drive gear 1, thereby avoiding collision and interference between the slide rod 6 and the drive gear 1, which affects normal operation.

[0026] Embodiment 3, on the basis of embodiment 1, the circular arc slide 2 is a circular arc slide rail, a slider is slidably provided on the circular arc slide rail, a bearing is provided on the slider, the outer ring of the bearing is fixedly connected to the slider, the inner ring of the bearing is fixedly connected to the end of the slide rod 6, and the clutch gear 3 is coaxially fixed on the slide rod 6, so that the clutch gear can rotate under the action of the bearing, and can also move along the circular arc slide rail with the slider to switch the meshing position.

[0027] The minimum distance from the side wall of the slide bar 6 to the axis of the driving gear 1 is greater than the distance from the outermost end of the driving gear 1 to the axis of the driving gear 1, so as to avoid collision between the slide bar and the driving gear when the clutch gear moves.

[0028] Embodiment 4, based on Embodiment 2 or 3, as a further optional implementation, the bearing 7 may be a damping bearing, which has a damping effect on the free rotation of the clutch gear 3, so that when the slide bar is not at the end of the arc-shaped slideway 2, the driving gear 1 can first drive the clutch gear 3 to slide along the arc-shaped slideway 2 to the end when the slide bar rotates, and then the driving gear 1 drives the clutch gear to rotate. In addition, in this embodiment, under the meshing action of the driving gear and the clutch gear, the arc-shaped slideway 2 and the bearing or the slider cooperate to limit the radius of the slide bar sliding path, so that the slide bar can only maintain a vertical state without tilting.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A clutch structure for a gear system, characterized in that: The invention comprises a driving gear (1) rotatably arranged on a support body and an arc-shaped slideway (2) fixedly arranged on the support body, wherein the axis of the arc-shaped slideway (2) coincides with the axis of the driving gear (1), and a clutch gear (3) meshing with the driving gear (1) is slidably arranged on the arc-shaped slideway (2), and a pair of driven gears (4) are arranged on the support body at the two ends of the arc-shaped slideway (2) correspondingly, and when the clutch gear (3) slides to the end of the arc-shaped slideway (2), it can mesh with one of the driven gears (4), and both driven gears (4) mesh with the output gear (5).

2. The clutch structure for a gear system according to claim 1, characterized in that: When the clutch gear (3) is located in the middle of the arc-shaped slideway (2), the sum of the tooth tip circle radius of the clutch gear (3) and the tooth tip circle radius of the output gear (5) is smaller than the distance between the axis of the clutch gear (3) and the axis of the output gear (5).

3. The clutch structure for a gear system according to claim 2, characterized in that: The arc-shaped slideway (2) is an arc-shaped slide groove, the clutch gear (3) is coaxially fixedly arranged on the slide rod (6), the end of the slide rod (6) is provided with a bearing (7), and the bearing (7) is arranged in the arc-shaped slide groove and can move in the arc-shaped slide groove.

4. The clutch structure for a gear system according to claim 3, characterized in that: The width of the arc-shaped slide groove is 4-15 mm.

5. The clutch structure for a gear system according to claim 2, characterized in that: The arc-shaped slideway (2) is an arc-shaped slide rail, a slider is slidably provided on the arc-shaped slide rail, a bearing is provided on the slider, an outer ring of the bearing is fixedly connected to the slider, an inner ring of the bearing is fixedly connected to the end of the slide rod (6), and the clutch gear (3) is coaxially fixedly arranged on the slide rod (6).

6. The clutch structure for a gear system according to claim 3, 4 or 5, characterized in that: The minimum distance between the side wall of the slide rod (6) and the axis of the drive gear (1) is greater than the distance between the outermost end of the drive gear (1) and the axis of the drive gear (1).

7. The clutch structure for a gear system according to claim 6, characterized in that: The transmission ratio between the driving gear (1) and the clutch gear (3) is greater than 1, and the transmission ratio between the driven gear (4) and the output gear (5) is greater than 1.

8. The clutch structure for a gear system according to claim 1 or 7, characterized in that: The transmission ratio between the clutch gear (3) and the driven gear (4) is less than 1.

9. The clutch structure for a gear system according to claim 8, characterized in that: The driving gear (1) is a double gear, and the clutch gear (3), the driven gear (4) and the output gear (5) are all spur gears.

10. The clutch structure for a gear system according to claim 9, characterized in that: The support body is a box structure, and a pair of arc-shaped slideways (2) are symmetrically arranged on the upper and lower side walls of the support body.

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