Clutch gear and rotational adjustment device

Abstract

A kind of clutch gear and rotation adjusting device, clutch gear includes: first gear (231) and second gear (232), first gear (231) and second gear (232) are provided with slider (26) and the elastic component (25) acting on slider (26) between, first gear (231) has the guide rail (237) guiding slider (26), second gear (232) has the tooth slot (2332);In normal circumstances, slider (26) is engaged into the tooth slot (2332) of second gear (232) under the action of elastic component (25), so that first gear (231) and second gear (232) synchronous rotation;When first gear (231) or second gear (232) is unable to rotate by resistance, slider (26) is guided from the tooth slot (2332) by the action of elastic component (25) under the tooth slot (2332) and slides out, to allow the relative rotation between first gear (231) and second gear (232). Clutch gear and rotation adjusting device can slip when being resisted, avoid damage to drive train by misoperation.

Description

Clutch gear and rotation adjustment device Technical Field

[0001] The present application relates to the field of rotation-adjustable transmission devices, and more particularly, to a clutch gear and a rotation-adjustable device. Background Art

[0002] A laser projector typically consists of a base and a projection device that rotates relative to the base. Users can adjust the rotation of the device relative to the base using a knob. Furthermore, users may rotate the device directly, potentially damaging the transmission system. Furthermore, if the user turns the knob beyond a certain limit, the device will stop rotating, potentially damaging the transmission system.

[0003] Summary of the Invention

[0004] The purpose of this application is to solve or at least alleviate the problems existing in the prior art.

[0005] According to one aspect of the present application, there is provided a clutch gear, comprising:

[0006] a first gear and a second gear, the first gear and the second gear being coaxially and adjacently arranged and each having an outer ring tooth;

[0007] A slider and an elastic member acting on the slider are provided between the first gear and the second gear, the first gear has a guide rail for guiding the slider, and the second gear has a tooth groove;

[0008] Among them, under normal circumstances, the slider engages into the tooth groove of the second gear under the action of the elastic member, so that the first gear and the second gear rotate synchronously; when the first gear or the second gear encounters resistance and cannot rotate, the slider overcomes the force of the elastic member under the guidance of the tooth groove and slides out of the tooth groove to allow relative rotation between the first gear and the second gear.

[0009] According to another aspect of the present application, there is provided a clutch gear, comprising:

[0010] a first gear and a second gear, the first gear and the second gear being coaxially and adjacently arranged and each having an outer ring tooth;

[0011] wherein the first gear and the second gear each have a first circumferential wall and a second circumferential wall extending toward each other;

[0012] wherein an elastic friction ring is provided between the first circumferential wall and the second circumferential wall, and the elastic friction ring is compressed between the first circumferential wall and the second circumferential wall to be in frictional contact with the first circumferential wall and the second circumferential wall respectively;

[0013] Under normal circumstances, the first gear and the second gear rotate synchronously due to the friction between them and the elastic friction ring; when the first gear or the second gear encounters resistance and cannot rotate, the friction surface between the first gear and the elastic friction ring and / or the friction surface between the second gear and the elastic friction ring slips to allow relative rotation between the first gear and the second gear.

[0014] According to another aspect of the present application, a rotation adjustment device is provided, comprising:

[0015] knob;

[0016] a worm gear transmission-connected to the knob;

[0017] a clutch gear according to various embodiments connected to the worm gear; and

[0018] An operating gear is transmission-connected to the clutch gear.

[0019] According to the embodiments of the present application, the clutch gear and the rotation adjustment device can slip when encountering resistance, thereby avoiding damage to the transmission system caused by erroneous operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of this application will be more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the figures represent similar components, where:

[0021] FIG1 shows a perspective view of a rotation adjustment device according to an embodiment of the present application;

[0022] 2 and 3 respectively show a front view and a rear view of a transmission mechanism in a rotation adjustment device according to an embodiment of the present application;

[0023] FIG4 shows a perspective view of a clutch gear according to an embodiment of the present application;

[0024] FIG5 shows an exploded view of the clutch gear in FIG4 ;

[0025] FIG6 shows a cross-sectional view of the clutch gear in FIG4 ;

[0026] FIG7 shows a perspective view of a clutch gear according to another embodiment of the present application;

[0027] FIG8 shows an exploded view of the clutch gear in FIG7 ;

[0028] FIG9 shows a cross-sectional view of the clutch gear in FIG7 ; and

[0029] FIG. 10 shows a longitudinal sectional view of the clutch gear in FIG. 7 . DETAILED DESCRIPTION

[0030] FIG1 shows a laser line projector according to an embodiment. The laser line projector includes a base 11 and a body 12. In an embodiment of the laser line projector, the body 12 may include a laser line projecting device, which may project a first projection line 91 and a second projection line 92 perpendicular to each other, with a vertical vertical line 93 at the intersection of the first projection line 91 and the second projection line 92. In addition, a battery 13 may be connected to the body 12. A knob 21 is mounted on the base 11. In addition, a transmission mechanism to be described in detail below may also be arranged in the base 11, so that the body can be adjusted to rotate around, for example, the vertical vertical line 93 by rotating the knob, thereby adjusting the position of the projection line. In addition, the user may also directly rotate the body 12 to quickly rotate the body 12 to a desired position.

[0031] Continuing with reference to Figures 2 and 3, which illustrate front and rear views of a transmission mechanism in a rotary adjustment device according to an embodiment of the present application, the transmission mechanism includes: a worm 22 in transmission connection with a knob 21; a clutch gear 23 in transmission connection with the worm 22; and an operating gear 24 in transmission connection with the clutch gear 23. In a specific embodiment, the knob 21 can be mounted on a knob post 210 and connected to a knob gear 211 via a connecting rod. The knob gear 211 meshes with a worm gear 221 on the worm. The worm 22, connected to the worm gear 221, meshes with a first gear 231 in the clutch gear 23. The second gear 232 in the clutch gear 23 meshes with the operating gear 24. In alternative embodiments, the transmission mechanism may include more or fewer components. For example, the knob 21 may be directly connected to the worm 22, or an intermediate gear or other mechanical transmission mechanism may be added at any suitable location. In some embodiments, the worm 22, the clutch gear 23 and the operating gear 24 can be set in the base 11, and the main body 12 can be connected to the operating gear 24 to rotate within a certain range with the operating gear 24. The operating gear 24 is, for example, fan-shaped to correspond to the rotatable range of the main body 12.

[0032] A clutch gear according to a first embodiment will be described with reference to Figures 4 to 6 . The clutch gear 23 includes a first gear 231 and a second gear 232 , which are coaxially and adjacently arranged and each have outer ring teeth. For example, one of the first gear 231 or the second gear 232 may have a core shaft extending from a center, while the other includes an axial hole for being sleeved onto the core shaft, thereby assembling the two. Alternatively, the first gear 231 and the second gear 232 may be maintained in relative position by any other suitable means. Although not shown, the first gear 231 and the second gear 232 may be axially fixed relative to each other. In this first embodiment, a slider 26 and an elastic member 25 acting on the slider 26 are disposed between the first gear 231 and the second gear 232. The first gear 231 has a guide rail 237 for guiding the slider 26, and the second gear has a tooth groove 2332.

[0033] As shown in FIG6 , under normal circumstances, the slider 26 engages with the tooth groove 2332 of the second gear under the action of the elastic member 25, causing the first gear 231 and the second gear 232 to rotate synchronously. When the first gear 231 or the second gear 232 encounters resistance and cannot rotate, the slider 26, guided by the tooth groove, overcomes the force of the elastic member 25 (compressing the elastic member 25 in the direction of arrow b) and slides out of the tooth groove 2332 in the direction of arrow a, allowing relative rotation between the first and second gears, for example, the second gear 232 rotates along the direction of arrow c. By providing the clutch gear 23, when the user directly rotates the body 12, the operating gear 24 will drive the second gear 232 of the clutch gear 23 to rotate. However, because the worm gear mechanism cannot transmit torque in the opposite direction, the first gear 231 will encounter resistance and cannot rotate. At this time, the clutch gear 23 described above will allow relative rotation between the first gear 231 and the second gear 232, thereby preventing damage to the transmission system. In addition, when the user adjusts the body 12 through the knob 21, when the body 12 rotates within the rotatable range, the clutch gear 23 is equivalent to an ordinary double gear transmitting torque. When the body 12 rotates to the boundary of the rotatable range, the rotation of the operating gear 24 or the body 12 will be restricted, which makes the second gear 232 encounter resistance and unable to rotate. At this time, the clutch gear 23 described above will allow relative rotation between the first gear 231 and the second gear 232, thereby avoiding excessive rotation of the knob 21 and causing damage to the transmission system.

[0034] In some embodiments, the slider 26 has a front end 261 and a rear end 262 in its sliding direction. The front end 261 of the slider 26 can be used to engage with the tooth groove 2332. In some embodiments, the front end 262 of the slider 26 is configured to be convex arc-shaped, or the corners of the front end 262 can be cut or chamfered. Correspondingly, the tooth groove 2332 can be configured to be concave arc-shaped, thereby facilitating the smooth ejection of the slider 26 from the tooth groove 2332.

[0035] In some embodiments, the second gear 232 has a sidewall 233 extending toward the first gear. The inner side of the sidewall 233 is formed into an inner ring gear comprising staggered tooth tips 2331 and tooth grooves 2332. Specifically, the tooth grooves 2332 extend along the entire inner circumference of the sidewall of the second gear 232. In alternative embodiments, the number of tooth grooves 2332 may vary, such as including only one tooth groove or only a pair of tooth grooves 2332 spaced 180 degrees apart. Furthermore, in some embodiments, each tooth tip 2331 is formed in a convex arc shape, thereby smoothly guiding the slider 26 from one tooth groove to the next. Furthermore, the sidewall provided by the second gear 232 further forms a cavity between the first gear 231 and the second gear 232, allowing the slider 26 and the elastic member 25 to be accommodated within this cavity.

[0036] In some embodiments, the rear end 262 of the slider 26 is supported by an elastic member 25. In some embodiments, the elastic member 25 can be any type of spring, such as a coil spring, a torsion spring, or a disc spring. The elastic member 25 is disposed on the elastic member support 238 of the first gear 231. In some embodiments, the elastic member 25 is a folding spring comprising a pair of intersecting elastic arms 251, 252, which support the rear end 262 of the slider 26. During torque transmission or relative rotation between the first and second gears, the front end of the slider 261 is subjected to a circumferential force, the direction of which changes depending on the direction of rotation. Supporting the rear end 262 of the slider 26 by the pair of intersecting elastic arms 251, 252 ensures that the elastic member 25 stably supports the rear end 262 regardless of the direction of the circumferential force applied to the front end 261. As shown in FIG. 5 , each of the pair of intersecting elastic arms 251, 252 can have a notch. The elastic member 25 also includes a U-shaped base 250 connected to a pair of intersecting elastic arms 251, 252. As shown in FIG6 , the elastic member bracket 238 on the first gear 231 has a U-shape that matches the base 250 and at least partially surrounds the base 250. Furthermore, the core shaft 239 of the first gear 231 is positioned precisely in the center of the U-shaped base 250, thereby avoiding the core shaft 239. This design allows the elastic member 25 to be arranged in a compact space within the gear and provide sufficient elastic force. Furthermore, the guide rails 237 on the first gear 231 can be configured to allow the slider 26 to slide in a radial direction. For example, the guide rails 237 can serve as stops on either side of the slider 26, allowing the slider 26 to slide in a plane parallel to the first gear 231 and the second gear 232. In alternative embodiments, the slider 26 can also slide in other directions within the aforementioned plane.

[0037] Continuing with reference to Figures 7 to 10 , a second embodiment of a clutch gear according to the present application will be described. This clutch gear also includes a first gear 231' and a second gear 232', which are coaxially and adjacently arranged and each have outer ring teeth. The first gear 231' and the second gear 232' each have a first circumferential wall 2311' and a second circumferential wall 2321' extending toward each other. An elastic friction ring 28 is disposed between the first circumferential wall 2311' and the second circumferential wall 2321'. The elastic friction ring 28 is compressed between the first circumferential wall 2311' and the second circumferential wall 2321' to frictionally contact the first circumferential wall 2311' and the second circumferential wall 2321', respectively. Under normal circumstances, the first gear 231' and the second gear 232' rotate synchronously due to friction. When the first gear 231' and the second gear 232' encounter resistance and cannot rotate, the friction surface between the first gear 231' and the elastic friction ring 28 and / or the friction surface between the second gear 232' and the elastic friction ring 28 slips, allowing relative rotation between the first gear 231' and the second gear 232'. Similar to the first embodiment described above in conjunction with the clutch gear, the clutch gear according to this second embodiment can also allow relative rotation between the first gear 231' and the second gear 232' when the user directly rotates the body 12 or the user excessively rotates the knob 21, thereby avoiding damage to the transmission system.

[0038] The clutch gear according to the embodiment of the present application can allow relative rotation between the first gear and the second gear. It has an appearance similar to a double gear and a compact axial size, and can be applied to various transmission mechanisms.

[0039] The specific embodiments described above are intended only to more clearly illustrate the principles of the present invention, wherein the various components are clearly shown or described to facilitate understanding of the principles of the present invention. Those skilled in the art may readily make various modifications or variations to the present invention without departing from the scope of the present invention. It should be understood that such modifications or variations are intended to be encompassed within the scope of the present invention.

Claims

1. A clutch gear, comprising: A first gear (231) and a second gear (232), wherein the first gear (231) and the second gear (232) are coaxially and adjacently arranged and each has an outer ring tooth; A slider (26) and an elastic member (25) acting on the slider (26) are provided between the first gear (231) and the second gear (232); the first gear (231) has a guide rail (237) for guiding the slider (26); and the second gear (232) has a tooth groove (2332); Wherein, under normal circumstances, the slider is engaged with the tooth groove (2332) of the second gear (232) under the action of the elastic member (25), so that the first gear (231) and the second gear (232) rotate synchronously; when the first gear (231) or the second gear (232) encounters resistance and cannot rotate, the slider (26) overcomes the action force of the elastic member (25) under the guidance of the tooth groove (2332) and slides out of the tooth groove (2332) to allow relative rotation between the first gear (231) and the second gear (232).

2. The clutch gear according to claim 1, characterized in that: The front end (261) of the slider that meshes with the tooth groove is configured to be a convex arc shape, or the corner of the front end of the slider (261) has a cut corner or a chamfer.

3. The clutch gear according to claim 2, characterized in that: The elastic member (25) acts on a rear end (262) of the slider (26) opposite to the front end (261), and the elastic member (25) is arranged on an elastic member bracket (238) of the first gear (231); Wherein, the elastic member is a folding spring (25), which comprises a pair of crossed elastic arms (251, 252), and the rear end (262) of the slider is jointly supported by the pair of crossed elastic arms (251, 252); The elastic member (25) further comprises a U-shaped base (250) connected to the pair of crossed elastic arms (251, 252), and the elastic member bracket (238) has a U-shape matching the base (250) and at least partially surrounds the base (250).

4. The clutch gear according to any one of claims 1 to 3, characterized in that: The second gear (232) has a side wall (233) extending toward the first gear (231), the inner side of the side wall (233) is formed as an inner gear ring, and the inner gear ring includes staggered tooth tips (2331) and the tooth grooves (2332); The first gear (231) includes a core shaft (239) extending from the center, and the second gear (232) includes an axial hole to be sleeved on the core shaft (239) of the first gear (231).

5. The clutch gear according to claim 4, characterized in that: Each of the tooth tips (2331) is configured to be a convex arc shape and each of the tooth grooves (2332) is configured to be a concave arc shape.

6. The clutch gear according to any one of claims 1 to 4, characterized in that: The guide rail (237) is configured to enable the slider (26) to slide in a radial direction within a plane parallel to the first gear (231) and the second gear (232).

7. A clutch gear, comprising: A first gear (231') and a second gear (232'), wherein the first gear (231') and the second gear (232') are coaxially and adjacently arranged and each has an outer ring tooth; Wherein, the first gear (231') and the second gear (232') each have a first circumferential wall (2311') and a second circumferential wall (2321') extending toward each other; Wherein, an elastic friction ring (28) is arranged between the first circumferential wall (2311') and the second circumferential wall (2321'), and the elastic friction ring (28) is pressed between the first circumferential wall (2311') and the second circumferential wall (2321') to be in frictional contact with the first circumferential wall (2311') and the second circumferential wall (2321') respectively; Under normal circumstances, the first gear (231') and the second gear (232') rotate synchronously due to the friction between them and the elastic friction ring (28); when the first gear (231') or the second gear (232') encounters resistance and cannot rotate, the friction surface between the first gear (231') and the elastic friction ring (28) and / or the friction surface between the second gear (232') and the elastic friction ring (28) slips to allow relative rotation between the first gear (231') and the second gear (232').

8. A rotation adjustment device, comprising: Knob (21); a worm (22) drivingly connected to the knob (21); A clutch gear (23) according to any one of claims 1 to 7, which is transmission-connected to the worm (22); and an operating gear (24) which is transmission-connected to the clutch gear (23).

9. The rotation adjustment device according to claim 8, characterized in that: The knob (21) is connected to a knob gear (211) via a connecting rod. The knob gear (211) meshes with a worm gear (221) on the worm. The worm (22) meshes with one of a first gear (231) and a second gear (232) in the clutch gear (23). The other of the first gear (231) and the second gear (232) meshes with the operating gear (24).

10. The rotation adjustment device according to claim 8 or 9, characterized in that: It includes: A base (11), the knob (21), the worm (22), the clutch gear (23) and the operating gear (24) are arranged in the base (11); as well as A body (12) connected to the operating gear (24) so ​​that the rotation of the body (12) can be adjusted by rotating the knob (21); Wherein, the fuselage body (12) includes a laser projection device.

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