CN210164869U

CN210164869U - Actuating device with hand turning and anti-pinch mechanism

Info

Publication number: CN210164869U
Application number: CN201920802847.XU
Authority: CN
Inventors: 林煜畅
Original assignee: Timotion Technology Co Ltd
Current assignee: Timotion Technology Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-03-20
Anticipated expiration: 2029-05-30

Abstract

The utility model discloses an actuating device with hand turning and anti-pinch mechanism, which comprises an actuating main body, a hand turning mechanism and an anti-pinch mechanism, wherein the actuating main body is provided with a telescopic pipe; when the telescopic pipe encounters a block in the retraction stroke, the clutch wheel is separated from the linkage with the connecting plate and idles along with the telescopic pipe. Borrow this, not only can come to do the rotation to flexible pipe by manual mode and retract outward, more can reach the dual effect of preventing pressing from both sides in the stroke of flexible pipe retraction.

Description

Actuating device with hand turning and anti-pinch mechanism

Technical Field

The utility model relates to an actuating device technique indicates especially one kind and has hand turning concurrently and prevent the actuating device of pressing from both sides mechanism.

Background

The Actuator (Actuator) mainly uses the motor and the driving components such as the worm, the worm wheel, etc. to drive a lead screw to rotate, and meanwhile, the lead screw drives the extension tube screwed on the lead screw to do linear extending or retracting movement, because the structure and the installation of the Actuator are simpler and more convenient than that of an air and oil hydraulic cylinder, the Actuator is widely applied to various devices such as nursing beds, electric chairs, doors, windows, etc., or other fields needing extending and retracting operations.

When the existing actuating device is applied to the above devices, the situation that the motor cannot operate due to pressure drop or power failure is avoided in the using process, and the actuating device with the manual operation function is provided, so that the problems can be solved and overcome.

In addition, most of the conventional actuating devices are provided with a front limit switch and a rear limit switch in the moving path of the nut of the telescopic tube, so that the nut can respectively touch the front limit switch and the rear limit switch in the process of screwing and driving with the lead screw, and the moving stroke of the telescopic tube extending outwards or retracting inwards is effectively limited.

However, when the conventional actuating device is applied to devices such as an electric chair, an electric window or a medical hanger, the nut can be used to trigger the limit switches only at two end positions of the telescopic tube, so that the motor can be stopped.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a have hand concurrently and change and prevent actuating device who presss from both sides mechanism, it not only can come to do the rotating retraction to flexible pipe by the manual mode outside, more can reach the dual effect of preventing pressing from both sides in the stroke of flexible pipe retraction.

In order to achieve the above object, the present invention provides an actuating device with a hand-turning and anti-pinching mechanism, comprising an actuating main body, a hand-turning mechanism and an anti-pinching mechanism, wherein the actuating main body comprises a lead screw and a telescopic tube screwed with the lead screw, and the actuating main body further comprises a front support; the hand rotating mechanism comprises an inner cylinder component and a hand rotating wheel, the inner cylinder component is provided with a central shaft, an annular body wound outside the central shaft and a connecting plate connected between the central shaft and the annular body, the front support is connected at one end of the central shaft, and the hand rotating wheel is sleeved between the inner cylinder component and the front support and can be operatively embedded in the annular body or the front support; the anti-pinch mechanism comprises a clutch wheel which is fixedly arranged at one end of the telescopic pipe and can be movably sleeved at the other end of the central shaft; when the telescopic pipe encounters blocking in the retraction stroke, the clutch wheel is separated from linkage with the connecting plate, so that the clutch wheel idles along with the telescopic pipe.

Wherein, the connecting plate is provided with a driven part, and the clutch wheel is provided with an actuating part occluded on the driven part.

Wherein, the driven part is a radial multi-tooth convex tooth, and the actuating part is a radial multi-tooth straight tooth.

The anti-pinch mechanism further comprises a stop ring, the central shaft comprises a second shaft section, the stop ring is sleeved and fixed on the second shaft section, and a gap is formed between the end face of the clutch wheel and the end face of the stop ring.

The hand-turning mechanism also comprises a spiral spring, a baffle ring extends from the annular body, the spiral spring is sleeved on the outer periphery of the annular body, and two ends of the spiral spring are respectively and elastically clamped between the hand-turning wheel and the baffle ring.

The hand-turning mechanism also comprises a radial bearing, the central shaft comprises a first shaft section, and the radial bearing is clamped between the first shaft section and the front support.

The manual rotating mechanism further comprises a thrust bearing, and the thrust bearing is sleeved on the first shaft section and clamped between the front support and the connecting plate.

The front support is connected with the first shaft section, and the clutch wheel is sleeved with the second shaft section.

The outer side of the annular body is provided with a plurality of key accommodating grooves, a plurality of convex keys which are arranged at intervals extend from the inner wall surface of the hand turning wheel, and each convex key is arranged corresponding to each key accommodating groove.

The front support is provided with a plurality of key slots towards one end of the hand turning wheel, a plurality of convex keys arranged at intervals extend from the inner wall surface of the hand turning wheel, and each convex key is arranged corresponding to each key slot.

The utility model discloses still have following efficiency, borrow by the setting of backstop ring, can prevent effectively that the clutch pulley from breaking away from and going out from the second shaft section. The spiral spring is elastically clamped between the hand rotating wheel and the retaining ring, so that the hand rotating wheel can achieve the effect of automatic reset. The radial bearing and the thrust bearing are arranged, so that the inner barrel component can rotate relative to the front support.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

Fig. 1 is a perspective view of the actuator of the present invention.

Fig. 2 is an exploded view of the hand turning mechanism and the anti-pinch mechanism of the present invention.

Fig. 3 is an exploded view of the hand turning mechanism and the anti-pinch mechanism of the present invention from another viewing angle.

Fig. 4 is a combined sectional view of the actuator of the present invention.

Fig. 5 is a sectional view showing a state of use of the linkage of the manual rotation mechanism and the telescopic tube of the present invention.

Fig. 6 is a sectional view showing the use state of the clutch wheel of the present invention in which the clutch wheel is disengaged from the linkage of the hand rotating mechanism and idles with the extension tube.

Wherein, the reference numbers:

10 … actuator body

11 … electric motor

12 … gearbox

13 … transmission mechanism

131 … lead screw

132 … Worm wheel

14 … casing

15 … outer tube

16 … Telescopic tube

161 … nut

17 … rear support

18 … front support

181 … keyway

20 … hand-turning mechanism

21 … inner barrel component

22 … center shaft

221 … first shaft section

222 … second shaft section

23 … annular body

231 … key-containing slot

232 … baffle ring

24 … connecting plate

241 … passive part

25 … spiral spring

26 … radial bearing

27 … thrust bearing

28 … hand-operated wheel

281 … convex key

30 … anti-pinch mechanism

31 … clutch wheel

311 … actuator

32 … stop ring

Interval A …

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the drawings, but the drawings are only for reference and illustration and are not intended to limit the present invention.

Referring to fig. 1 to 4, the present invention provides an actuating device with a hand-turning and anti-pinching mechanism, which mainly includes an actuating body 10, a hand-turning mechanism 20 and an anti-pinching mechanism 30.

The actuating body 10 mainly comprises an electric motor 11, a gear box 12, a transmission 13, a housing 14, an outer tube 15, a telescopic tube 16, a rear support 17 and a front support 18, among other components.

The motor 11 is connected with the gear box 12, and the transmission mechanism 13 includes a lead screw 131, one end of the lead screw 131 is supported inside the gear box 12 by a plurality of bearings, and is engaged and transmitted by a worm gear 132 connected with the lead screw 131 and a worm (not shown) of the motor 11.

The housing 14 is totally covered outside the motor 11 and the gear box 12; one end of the outer tube 15 is inserted into the housing 14 and arranged corresponding to the gear case 12, and the other end of the outer tube 15 extends away from the housing 14.

The extension tube 16 is disposed inside the outer tube 15 and surrounds the outer periphery of the lead screw 131, and a nut 161 is connected to one end of the extension tube 16, and the nut 161 is screwed with the lead screw 131, so that the extension tube 16 can be driven to move linearly relative to the outer tube 15 by the rotation of the lead screw 131.

The rear support 17 is fixed at the rear end of the gear housing 12 and exposed to the outside of the housing 14, and the front support 18 is connected to the end of the telescopic tube 16 away from the nut 161 by a hand turning mechanism 20 and an anti-pinch mechanism 30.

The hand turning mechanism 20 mainly comprises an inner cylinder member 21 and a hand turning wheel 28, the inner cylinder member 21 mainly comprises a central shaft 22, an annular body 23 and a connecting plate 24, the central shaft 22 comprises a first shaft section 221 and a second shaft section 222, the first shaft section 221 is formed on the left side area of the connecting plate 24, the second shaft section 222 is formed on the right side area of the connecting plate 24, and the front support 18 is connected to the end of the first shaft section 221 through a bolt.

The annular body 23 is disposed around the outer periphery of the central shaft 22, and a plurality of key receiving grooves 231 are formed on the outer side surface of the annular body 23, and a retaining ring 232 extends from the bottom edge of the annular body 23. The connecting plate 24 is connected between the central shaft 22 and the annular body 23, and a driven portion 241 is provided on a side of the connecting plate 24 adjacent to the second shaft section 222, where the driven portion 241 is a radial multi-tooth in this embodiment.

The hand turning wheel 28 is sleeved on the outer periphery of the inner barrel component 21, and a plurality of convex keys 281 are arranged on the inner wall surface of the hand turning wheel 28 at intervals in an extending mode; further, a plurality of key grooves 181 are provided at one end of the front mount 18 facing the hand reel 28, and the respective projecting keys 281 are disposed corresponding to the respective key receiving grooves 231 and the respective key grooves 181, respectively, so that the hand reel 28 can be operatively fitted between the inner tubular member 21 and the front mount 18 through the respective projecting keys 281 and the respective key grooves 181 or the respective key receiving grooves 231.

The hand-turning mechanism 20 further comprises a coil spring 25, a radial bearing 26 and a thrust bearing 27, wherein the coil spring 25 is disposed around the outer circumference of the annular body 23 and both ends thereof are elastically clamped between the hand-turning wheel 28 and the retaining ring 232 of the annular body 23. The radial bearing 26 is interposed between the first shaft section 221 and the front support 18, and the thrust bearing 27 is interposed between the first shaft section 221 and the front support 18 and the connecting plate 24.

The anti-pinch mechanism 30 mainly includes a clutch wheel 31, the clutch wheel 31 is fixed at one end of the telescopic tube 16 and movably sleeved on the second shaft section 222 of the central shaft 22, an actuating portion 311 is provided at an end surface of the clutch wheel 31 facing the connecting plate 24, the actuating portion 311 of the embodiment is a radial multi-tooth straight tooth which can be engaged with the driven portion 241 to be linked together, and can be disengaged from the driven portion 241 to rotate along with the telescopic tube 16.

The anti-pinch mechanism 30 further includes a stop ring 32, the stop ring 32 is sleeved and fixed on the end of the second shaft section 222, and a gap a (see fig. 5) is formed between the end surface of the clutch wheel 31 and the end surface of the stop ring 32, the stop ring 32 is used for preventing the clutch wheel 31 from being separated from the second shaft section 222.

Referring to fig. 5, when the actuator is applied to a medical hanger (e.g. cervical spine rehabilitation equipment), the medical hanger has a hanger body and a boom (not shown), the rear support 17 is fixed on the hanger body, the front support 18 is connected to the boom and constantly keeps not rotating, so that the motor 11 cannot operate without pressure drop or power failure during use, the hand-operated wheel 28 can be pushed linearly toward the inner barrel member 21 to insert the convex keys 281 into the key slots 231; then, the hand wheel 28 is rotated clockwise, since the actuating portion 311 of the clutch wheel 31 is engaged with the receiving portion 241 of the connecting plate 24, the rotating hand wheel 28 will simultaneously drive the inner barrel member 21, the clutch wheel 31 and the extension tube 16 to rotate together, and the lead screw 131 is restrained by the motor 11 and does not rotate, so that the extension tube 16 is screwed with the lead screw 131 through the nut 161 thereof, and further can rotate and retract toward the inside of the outer tube 15.

Referring to fig. 6, the actuator is applied to a medical hanger and the hanger is lifted up and down, so that it is necessary to install the anti-pinch mechanism 30 on the actuator, and during the operation of the motor 11, the telescopic tube 16 can be moved out relative to the outer tube 15 by rotating the worm gear 132 and the worm driving lead screw 131 and screwing the nut 161 with the lead screw 131. When the telescopic tube 16 encounters a blockage in the retraction stroke, i.e. the hand wheel 28 or the inner cylinder member 21 is blocked, the motor 11 continues to drive the lead screw 131 to rotate, and the hand wheel 28 and the inner cylinder member 21 are fixed, at this time, the actuating portion 311 of the clutch wheel 31 is disengaged from the engagement linkage with the passive portion 241 of the connecting plate 24, so that the clutch wheel 31 idles along with the telescopic tube 16. Conversely, when the blocking condition is eliminated, the hand-wheel 28 and the inner cylinder member 21 move toward the telescopic tube 16, the driven portion 241 of the link plate 24 engages with the actuating portion 311 of the clutch wheel 31 again, and the hand-wheel 28 and the inner cylinder member 21 and the front support 18 retract with the telescopic tube 16.

Of course, the present invention can have other embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the claims of the present invention.

Claims

1. An actuating device with hand turning and anti-pinch mechanism, comprising:

the actuating main body comprises a lead screw and a telescopic pipe screwed with the lead screw, and the actuating main body also comprises a front support;

a hand rotating mechanism, including an inner barrel component and a hand rotating wheel, the inner barrel component has a central shaft, a ring body wound outside the central shaft and a connecting plate connected between the central shaft and the ring body, the front support is connected with one end of the central shaft, the hand rotating wheel is sleeved between the inner barrel component and the front support and can be operatively embedded in the ring body or the front support; and

the anti-clamping mechanism comprises a clutch wheel, the clutch wheel is fixedly arranged at one end of the telescopic pipe and can be movably sleeved at the other end of the central shaft;

when the telescopic pipe encounters blocking in the retraction stroke, the clutch wheel is separated from linkage with the connecting plate, so that the clutch wheel idles along with the telescopic pipe.

2. The actuator of claim 1, wherein the connecting plate has a passive portion, and the clutch wheel has an actuating portion engaged with the passive portion.

3. The device as claimed in claim 2, wherein the driven portion is a plurality of radial teeth and the actuating portion is a plurality of radial teeth.

4. The actuator of claim 1, further comprising a stop ring, wherein the central shaft comprises a second shaft section, the stop ring is disposed and fixed on the second shaft section, and a space is formed between the end surface of the clutch wheel and the end surface of the stop ring.

5. The actuator of claim 1, further comprising a coil spring extending from the annular body, the coil spring surrounding the annular body and having two ends resiliently clamped between the hand wheel and the retaining ring.

6. The actuator of claim 5, wherein the hand turning mechanism further comprises a radial bearing, the central shaft comprises a first shaft section, and the radial bearing is interposed between the first shaft section and the front support.

7. The actuator of claim 6, further comprising a thrust bearing, wherein the thrust bearing is sleeved on the first shaft section and clamped between the front support and the connecting plate.

8. The actuator of claim 1, wherein the central shaft comprises a first shaft section and a second shaft section, the front support is connected to the first shaft section, and the clutch wheel is coupled to the second shaft section.

9. The actuator of claim 1, wherein the annular body has a plurality of key receiving slots formed on an outer side thereof, and a plurality of protruding keys are spaced apart from each other on an inner wall surface of the hand wheel, and are disposed corresponding to the key receiving slots.

10. The actuator of claim 1, wherein the front support has a plurality of key slots at an end thereof facing the hand wheel, and the hand wheel has a plurality of spaced apart keys extending from an inner wall thereof, each key being disposed corresponding to one of the key slots.