CN104061303B - Actuation device with quick release mechanism - Google Patents

Abstract

The invention relates to an actuating device with a quick release mechanism, which comprises a base, an electric motor, a transmission mechanism, the quick release mechanism, an elastic component and a wrenching mechanism, wherein the electric motor and the transmission mechanism are connected with the base; the transmission mechanism comprises a worm gear component, a lead screw and a bearing, wherein the worm gear component is formed with a convex key; the quick release mechanism comprises a first cylinder and a second cylinder which are fixedly connected with the guide screw, and the second cylinder is provided with a key groove which is in embedded transmission or separated transmission with the convex key; the elastic component is clamped between the worm gear member and the second cylinder; the turning mechanism comprises a rotating piece pivoted on the base, and the rotating piece is provided with a poking arm for pushing the second cylinder body to be separated from the torque transmission of the worm gear member. The invention has simplified structure and simple operation, and is easy to assemble and combine.

Description

Actuation device with quick release mechanism

technical field

The invention relates to an actuating device, especially an actuating device with a quick release mechanism.

Background technique

It is quite common and common to apply linear actuators (Actuator) to electric hospital beds, treadmills, wheelchairs, etc., as the adjustment and transformation of position height or elevation angle; among them, it has the function of The quick-release mechanism that releases the actuating device quickly can make the hospital bed be adjusted and changed quickly, so as to strive for the most precious golden rescue time, which is an important subject studied by the present invention.

The known actuating device with a quick release mechanism, as disclosed in Chinese Invention Patent Announcement No. CN100552263C, mainly includes an electric motor, a transmission mechanism and a quick release mechanism. The motor includes a main body and protrudes outward from the center of the main body. A worm, and the transmission mechanism includes a lead screw and a worm gear sleeved on one end of the lead screw and meshed with the aforementioned worm for transmission. The quick release mechanism includes two cylindrical coupling parts, one of which is fixed on the lead screw And follow the rotation, the other cylindrical coupling part is fixed on the worm wheel and follows the rotation. A torque transmission assembly is installed at the corresponding end of each cylindrical coupling part, and the lead screw and the worm gear are driven by the clutch between the cylindrical coupling parts. Drive together or disengage.

However, the conventional actuating device with a quick release mechanism still has the following problems in actual use. Due to its complex structure and numerous components, it is not only difficult to assemble and assemble, but also in terms of materials and processing of the components. It is also a waste of money, thus greatly improving its cost and cost. In addition, it actuates the clutches of the cylinder coupling parts in a pushing manner, and the generated force is relatively small, which causes inconvenience in use and operation.

Contents of the invention

An object of the present invention is to provide an actuating device with a quick-release mechanism, which is not only easy to assemble and assemble but also quite simple and convenient to operate through a simplified design of the overall structure.

In order to solve the above technical problems, the invention provides an actuating device with a quick release mechanism, comprising:

a base;

an electric motor, connected to the base, the electric motor has a worm;

A transmission mechanism, connected to the base, the transmission mechanism includes a worm gear member, a lead screw and a bearing, the worm gear member is driven by the worm screw and formed with a plurality of convex keys, the lead screw rod passes through the worm gear member and passes through the bearing supported on the base;

A quick release mechanism is sleeved on the lead screw and formed on the side of the worm gear member. The quick release mechanism includes a first cylinder fixed to the lead screw and connected to the first cylinder and can be pivoted A second cylindrical body that is displaced in the direction, and the second cylindrical body is provided with a plurality of key grooves that are respectively engaged with or disengaged from the protruding keys;

an elastic component, elastically clamped between the worm gear member and the second cylindrical body; and

A turning mechanism includes a rotating part pivotally connected to the base, and the rotating part has a toggle arm that pushes away the second cylindrical body to break away from the torque transmission with the worm gear member.

Further, the base includes a lower base body and an upper base body corresponding to the lower base body, a pair of studs corresponding to each other are formed on the outside of the lower base body and the upper base body, and the rotating part is A U-shape, the toggle arm is formed at the open end of the rotary member, and the rotary member is respectively pivotally connected to each of the studs through a bolt.

Further, the motor includes a main body and a motor housing for the main body to accommodate, the main body has an electrical component, the worm protrudes from the center of the electrical component, and the motor housing is connected to the base.

Further, the turning mechanism further includes a cover, which is combined corresponding to the cover of the motor housing and covers the base.

Further, the turning mechanism also includes a pull rod, the cover has a shaft hole, the pull rod passes through the shaft hole and is supported on the cover through two shaft seats, and the pull rod between the two shaft seats is connected There is a hook portion connected corresponding to the closed end of the rotary member.

Further, the worm gear member protrudes toward the end surface of the quick release mechanism with an annular receiving portion, the end surface of the second cylindrical body extends a protruding ring, the elastic component is a helical compression spring, and the two ends of the helical compression spring are respectively It is sleeved on the protruding ring and the annular receiving part.

Further, the transmission mechanism further includes a telescopic tube screwed and driven mutually with the lead screw, and the lead screw is a non-self-locking lead screw.

Further, the lead screw has a positioning section, the first cylinder has a positioning hole, and the first cylinder is socketed and fixed on the positioning section of the lead screw through the positioning hole.

Further, the outer peripheral surface of the first cylinder is formed with a plurality of anti-rotation keys surrounding at intervals, and the second cylinder is formed with a plurality of grooves for fitting the anti-rotation keys.

Further, a stop ring is formed on the end of the second cylinder away from the first cylinder, and the rotating member is actuated by the toggle arm corresponding to the stop ring.

The present invention also provides an actuating device with a quick release mechanism, comprising:

a base;

an electric motor, connected to the base, the electric motor has a worm;

A transmission mechanism, connected to the base, the transmission mechanism includes a worm gear member, a lead screw and a bearing, the worm gear member includes a worm wheel driven by the worm screw and a bushing connected to the worm wheel and following rotation, the bushing A plurality of convex keys are formed, and the lead screw passes through the worm gear member and is supported on the base through the bearing;

A quick release mechanism is sleeved on the lead screw and formed on the side of the worm gear member. The quick release mechanism includes a first cylinder fixed to the lead screw and connected to the first cylinder and can be pivoted A second cylindrical body that is displaced in the direction, and the second cylindrical body is provided with a plurality of key grooves that are respectively engaged with or disengaged from the protruding keys;

an elastic component, elastically clamped between the worm wheel and the second cylindrical body; and

A toggle mechanism includes a rotating part pivotally connected to the base, and the rotating part has a toggle arm that pushes away the second cylindrical body to break away from the torque transmission with the shaft sleeve.

Further, the base includes a lower base body and an upper base body corresponding to the lower base body, a pair of studs corresponding to each other are formed on the outside of the lower base body and the upper base body, and the rotating part is A U-shape, the toggle arm is formed at the open end of the rotary member, and the rotary member is respectively pivotally connected to each of the studs through a bolt.

Further, the motor includes a main body and a motor housing for the main body to accommodate, the main body has an electrical component, the worm protrudes from the center of the electrical component, and the motor housing is connected to the base.

Further, the turning mechanism further includes a cover, which is combined corresponding to the cover of the motor housing and covers the base.

Further, wherein the turning mechanism also includes a pull rod, the cover is provided with a shaft hole, the pull rod passes through the shaft hole and is supported on the cover through two shaft seats, and the pull rod between the two shaft seats A hook part is connected, and the hook part is connected corresponding to the closed end of the rotating part.

Further, the worm wheel protrudes toward the end surface of the quick release mechanism with a receiving portion, the end surface of the second cylindrical body extends a protruding ring, the elastic component is a helical compression spring, and the two ends of the helical compression spring are respectively sleeved on the collar and the receiving portion.

Further, the center of the receiving part is provided with a through hole, and the inner wall of the through hole is provided with a plurality of annularly arranged concave grooves, and the end of the shaft sleeve adjacent to the worm wheel is extended with a plurality of annularly arranged convex lines, Each of the protrusions of the shaft sleeve is respectively inserted into each of the concave grooves of the worm wheel, and a space for the second cylindrical body to rotate freely is formed between the receiving portion and the convex key.

Further, the transmission mechanism further includes a telescopic tube screwed and driven mutually with the lead screw, and the lead screw is a non-self-locking lead screw.

Further, the lead screw has a positioning section, the first cylinder has a positioning hole, and the first cylinder is socketed and fixed on the positioning section of the lead screw through the positioning hole.

Further, the outer peripheral surface of the first cylindrical body is formed with a plurality of anti-rotation keys surrounding at intervals, the second cylindrical body is formed with a plurality of grooves for fitting the anti-rotation keys, and the second cylindrical body A stop ring is formed at the end far away from the first cylindrical body, and the rotating member is actuated by the toggle arm corresponding to the stop ring.

The present invention also has the following effects, since the second cylindrical body and the worm gear member are released, the worm gear member does not have to bear the lateral thrust exerted by the rotating part, so that the worm gear member does not shift, which ensures Stable transmission between worm gear and worm. The pull rod is fastened to the rotating part, and the arc swing is converted into a linear movement, which greatly reduces the pulling force required by the operator.

Description of drawings

Fig. 1 is a combined schematic view of the actuating device of the present invention.

Fig. 2 is a three-dimensional exploded view of the base, the transmission mechanism and the quick-release mechanism of the present invention.

Fig. 3 is a three-dimensional exploded view of the worm gear component, the elastic component and the quick release mechanism of the present invention.

Fig. 4 is an exploded perspective view of the actuator device of the present invention.

Fig. 5 is a combined sectional view of the actuator device of the present invention.

Fig. 6 is an assembled appearance view of the turning mechanism of the present invention before it is actuated.

Fig. 7 is an assembled appearance diagram of the turning mechanism of the present invention after it is actuated.

FIG. 8 is a combined sectional view of FIG. 7 .

In the figure, 10...base

11...Lower body

111, 121… Studs

12... Upper seat body

13...cavity

20…Electric motor

21…subject

211...Electrical components

212…worm

22…Motor housing

30…Transmission mechanism

31...Worm gear member

311…Worm gear

312…Receiving department

313...Through hole

314…Concave groove

315…shaft sleeve

316…Convex key

317…Convex

318... Interval space

32…lead screw

321...Positioning section

33…Bearing

34...Telescopic tube

40…quick release mechanism

41...the first cylinder

411...Positioning hole

412...Stop rotation key

42...Second cylinder

421...Groove

422…Back ring

423…Convex ring

424…keyway

50…elastic components

60...Turning mechanism

61…Cover

611…Axis hole

612…shaft seat

62...Rotating parts

621…toggle arm

63…Tie rod

631…Hook

70…outer tube

80…rear support.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

1 to 5, the present invention provides an actuating device with a quick release mechanism, including a base 10, a motor 20, a transmission mechanism 30, a quick release mechanism 40, an elastic component 50 and A turning mechanism 60.

The base 10 includes a lower base body 11 and an upper base body 12 covering the corresponding lower base body 11, a cavity 13 is formed between the upper base body 12 and the lower base body 11, and the upper base body 12 and the lower base body 11 are passed through Screws and other screw components are threaded and screwed, and a pair of studs 111 and 121 corresponding to each other are formed on the outside of the lower base body 11 and the upper base body 12 .

The motor 20 includes a main body 21 and a motor housing 22 for the main body 21 to accommodate. The main body 21 has an electrical component 211 and a worm screw 212 protruding from the center of the electrical component 211. The motor housing 22 abuts against the base 10 At this time, the worm 212 penetrates into the cavity 13 of the base 10 .

Transmission mechanism 30 comprises a worm gear member 31, a lead screw rod 32 and a bearing 33, and worm gear member 31 comprises a worm gear 311 and an axle sleeve 315, and wherein axle sleeve 315 and worm gear 311 can form aforesaid worm gear member 31 ( The figure is not shown), the worm wheel 311 and the shaft sleeve 315 of the present embodiment are fabricated separately and then assembled. The worm wheel 311 is driven by the aforementioned worm 212, and the shaft sleeve 315 is connected to the worm wheel 311 and rotates accordingly. An annular receiving portion 312 protrudes from the end surface of the worm wheel 311 toward the quick release mechanism 40, and a through hole 313 is opened in the center of the receiving portion 312, and a plurality of grooves 314 arranged in a ring shape are provided on the inner wall of the through hole 313. The end of the shaft sleeve 315 away from the worm wheel 311 is formed with a plurality of annularly arranged protruding keys 316, and the end of the shaft sleeve 315 adjacent to the worm wheel 311 is extended with a plurality of annularly arranged convex lines 317, and the shaft sleeve 315 corresponds to each convex line 317. Each concave groove 314 of the through hole 313 of the worm wheel 311 is pierced and embedded, and a space 318 is formed between the receiving portion 312 and the convex key 316 (as shown in FIG. 5 ). The bearing 33 is accommodated and fixed inside the cavity 13 of the base 10 . One end of the lead screw 32 is passed through the sleeve 315 and supported on the base 10 through the bearing 33 . The lead screw 32 has a positioning section 321 . In addition, the transmission mechanism 30 also includes a telescopic tube 34 screwed and driven mutually with the lead screw 32 , and the lead screw 32 is a non-self-locking lead screw.

The quick release mechanism 40 is sleeved on the lead screw 32 and formed on the side of the worm wheel 311 of the worm gear member 31. The quick release mechanism 40 includes a first cylinder 41 and a second cylinder 42. The first cylinder 41 There is a positioning hole 411, the first cylindrical body 41 is sleeved and fixed on the positioning section 321 of the lead screw 32 by the positioning hole 411, so as to rotate together with each other, and a spaced ring is formed on the outer peripheral surface of the first cylindrical body 41. Most of the detent keys 412. The second cylindrical body 42 is sleeved on the first cylindrical body 41, and the inner wall of the second cylindrical body 42 is formed with a plurality of grooves 421 for the engagement of the anti-rotation keys 412, so that the second cylindrical body 42 can be relatively The first cylindrical body 41 produces an axial displacement, and a retaining ring 422 is formed at the end of the second cylindrical body 42 away from the first cylindrical body 41 . In addition, a protruding ring 423 extends from the end surface of the second cylindrical body 42 on the side of the retaining ring 422 . Moreover, the inner wall of the second cylindrical body 42 on the side of the retaining ring 422 is provided with a plurality of key grooves 424 for selectively fitting the aforementioned protruding keys 316 .

The elastic component 50 of this embodiment is a helical compression spring, two ends of which are respectively sleeved on the aforementioned protruding ring 423 and the aforementioned receiving portion 312 , and elastically clamped between the worm wheel 311 and the second cylindrical body 42 .

The turning mechanism 60 includes a cover 61, a rotating part 62 and a pull rod 63. The cover 61 is corresponding to the cover of the aforementioned motor housing 22 and covers the base 10. The rotating part 62 is U-shaped. The rotating part 62 is pivotally connected to the aforementioned studs 111, 121 through components such as bolts, and a pair of toggle arms 621 extend inwardly from the open end of the rotating part 62. The pair of toggle arms 621 correspond to The retaining ring 422 of the aforementioned second cylindrical body 42 is configured. A shaft hole 611 is provided in the cover 61, the pull rod 63 passes through the shaft hole 611 and is supported on the cover 61 by two shaft seats 612, and a hook 631 is connected to the pull rod 63 between the two shaft seats 612, and the hook 631 Corresponding to the closed end connection of the rotary member 62 .

The actuating device of the present invention also includes an outer tube 70 and a rear support 80 , wherein the outer tube 70 is sheathed on the outer periphery of the telescopic tube 34 , and one end thereof is fixed to the end of the motor casing 22 and the cover 61 . The rear support 80 is threaded and fixed on the end of the base 10 away from the outer tube 70 , and a part of the area protrudes to expose the other end of the motor casing 22 and the cover 61 .

Figure 6 is a schematic diagram of the combination of the pull rod 63 before it is actuated, as shown in Figure 7, when in use, pull the pull rod 63 to move away from the rear support 80, and use the hook 631 of the pull rod 63 to rotate the rotating member 62 , the rotating member 62 will be pivotally connected to each stud 111, 121 as the center of rotation, so that the toggle arm 621 pushes the stop ring 422 of the second cylinder 42, and makes the second cylinder 42 face the direction of the worm wheel 311 At this time, each protruding key 316 of the shaft sleeve 315 and each key groove 424 of the second cylinder 42 will disengage from torque transmission. Then, after the expansion tube 34 is pressed, the lead screw 32 will be rotated. During the rotation of the lead screw 32, the first cylinder 41 and the second cylinder 42 will be driven to rotate together, and the worm gear 311 and the shaft will rotate together. Cover 315 then remains stationary. It can be known from FIG. 8 that the area of the second cylindrical body 42 with the keyway 424 will freely rotate in the space 318 between the receiving portion 312 and the protruding key 316 .

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be determined by the claims.

Claims (20)

1. An actuating device with a quick release mechanism, comprising: a base; an electric motor, connected to the base, the electric motor has a worm; A transmission mechanism, connected to the base, the transmission mechanism includes a worm gear member, a lead screw and a bearing, the worm gear member is driven by the worm screw and formed with a plurality of convex keys, the lead screw rod passes through the worm gear member and passes through the bearing supported on the base; A quick release mechanism is sleeved on the lead screw and formed on the side of the worm gear member. The quick release mechanism includes a first cylinder fixed to the lead screw and connected to the first cylinder and can be pivoted A second cylindrical body that is displaced in the direction, and the second cylindrical body is provided with a plurality of key grooves that are respectively engaged with or disengaged from the protruding keys; an elastic component, elastically clamped between the worm gear member and the second cylindrical body; and A turning mechanism includes a rotating part pivotally connected to the base, and the rotating part has a toggle arm that pushes away the second cylindrical body to break away from the torque transmission with the worm gear member. 2. The actuating device with a quick-release mechanism as claimed in claim 1, wherein the base comprises a lower seat and an upper seat corresponding to the lower seat, and the lower seat and the lower seat A pair of studs corresponding to each other are formed on the exterior of the upper base. The rotating part is U-shaped. The toggle arm is formed at the opening end of the rotating part. The rotating part is respectively pivotally connected to each One of the studs. 3. The actuating device with a quick release mechanism as claimed in claim 2, wherein the motor comprises a main body and a motor housing for the main body to accommodate, the main body has an electrical component, and the worm is automatically The center of the electrical component protrudes, and the motor casing is connected to the base. 4. The actuating device with a quick release mechanism as claimed in claim 3, wherein the toggle mechanism further comprises a cover, the cover is combined corresponding to the motor housing cover and covers the base . 5. The actuating device with a quick release mechanism as claimed in claim 4, wherein the turning mechanism further comprises a pull rod, the cover is provided with a shaft hole, and the pull rod passes through the shaft hole and passes through two The shaft seat is supported on the cover, and the pull rod between the two shaft seats is connected with a hook, and the hook is connected corresponding to the closed end of the rotating part. 6. The actuating device with a quick-release mechanism according to claim 1, wherein the worm gear member protrudes an annular receiving portion toward the end surface of the quick-release mechanism, and a convex portion extends from the end surface of the second cylinder. The elastic component is a helical compression spring, and the two ends of the helical compression spring are respectively sleeved on the protruding ring and the annular receiving portion. 7. The actuating device with a quick-release mechanism as claimed in claim 1, wherein the transmission mechanism further comprises a telescoping tube screwed and driven mutually with the lead screw, and the lead screw is a non-self-locking sex lead screw. 8. The actuating device with a quick-release mechanism as claimed in claim 1, wherein the lead screw has a positioning section, the first cylinder has a positioning hole, and the first cylinder uses the The positioning hole is sleeved and fixed on the positioning section of the lead screw. 9. The actuating device with a quick-release mechanism according to claim 1, wherein the outer peripheral surface of the first cylindrical body is formed with a plurality of anti-rotation keys surrounding at intervals, and the second cylindrical body is formed with Multiple grooves for fitting of the detent keys. 10. The actuating device with a quick-release mechanism according to claim 1, wherein a retaining ring is formed on the end of the second cylindrical body away from the first cylindrical body, and the rotating member is formed with the The toggle arm actuates the retaining ring. 11. An actuating device with a quick release mechanism, comprising: a base; an electric motor, connected to the base, the electric motor has a worm; A transmission mechanism, connected to the base, the transmission mechanism includes a worm gear member, a lead screw and a bearing, the worm gear member includes a worm wheel driven by the worm screw and a bushing connected to the worm wheel and following rotation, the bushing A plurality of convex keys are formed, and the lead screw passes through the worm gear member and is supported on the base through the bearing; A quick release mechanism is sleeved on the lead screw and formed on the side of the worm gear member. The quick release mechanism includes a first cylinder fixed to the lead screw and connected to the first cylinder and can be pivoted A second cylindrical body that is displaced in the direction, and the second cylindrical body is provided with a plurality of key grooves that are respectively engaged with or disengaged from the protruding keys; an elastic component, elastically clamped between the worm wheel and the second cylindrical body; and A toggle mechanism includes a rotating part pivotally connected to the base, and the rotating part has a toggle arm that pushes away the second cylindrical body to break away from the torque transmission with the shaft sleeve. 12. The actuating device with a quick-release mechanism as claimed in claim 11, wherein the base comprises a lower seat and an upper seat corresponding to the lower seat, and the lower seat and the lower seat A pair of studs corresponding to each other are formed on the exterior of the upper base body. The rotating member is U-shaped. The toggle arm is formed at the opening end of the rotating member. The rotating member is pivotally connected to the per the stud. 13. The actuating device with a quick release mechanism as claimed in claim 12, wherein the motor comprises a main body and a motor housing for the main body to accommodate, the main body has an electrical component, and the worm is automatically The center of the electrical component protrudes, and the motor casing is connected to the base. 14. The actuating device with a quick-release mechanism according to claim 13, wherein the toggle mechanism further comprises a cover, the cover is combined with the cover corresponding to the motor housing and covers the base . 15. The actuating device with a quick release mechanism according to claim 14, wherein the turning mechanism further comprises a pull rod, the cover is provided with a shaft hole, and the pull rod passes through the shaft hole and passes through The two shaft seats are supported on the cover, and the pull rod between the two shaft seats is connected with a hook, and the hook is connected corresponding to the closed end of the rotating part. 16. The actuating device with a quick-release mechanism as claimed in claim 11, wherein a receiving portion protrudes from the end surface of the worm wheel toward the quick-release mechanism, and a protruding ring extends from the end surface of the second cylinder, The elastic component is a helical compression spring, and the two ends of the helical compression spring are respectively sleeved on the convex ring and the receiving portion. 17. The actuating device with a quick-release mechanism as claimed in claim 16, wherein a through hole is opened in the center of the receiving part, and a plurality of grooves arranged in a ring shape are opened on the inner wall of the through hole, The shaft sleeve adjacent to the end of the worm wheel is extended with a plurality of protruding lines arranged in a ring shape, and each of the protruding lines of the shaft sleeve respectively corresponds to each of the concave grooves of the worm wheel. An interval space for the second cylindrical body to rotate freely is formed therebetween. 18. The actuating device with a quick-release mechanism as claimed in claim 11, wherein the transmission mechanism further comprises a telescopic tube screwed and driven mutually with the lead screw, and the lead screw is a non-self-locking sex lead screw. 19. The actuating device with a quick-release mechanism as claimed in claim 11, wherein the lead screw has a positioning section, the first cylinder has a positioning hole, and the first cylinder uses the The positioning hole is sleeved and fixed on the positioning section of the lead screw. 20. The actuating device with a quick-release mechanism according to claim 11, wherein the outer peripheral surface of the first cylinder is formed with a plurality of anti-rotation keys surrounding at intervals, and the second cylinder is formed with A number of slots for the anti-rotation keys to fit, a stop ring is formed on the end of the second cylinder away from the first cylinder, and the rotating member is actuated by the toggle arm corresponding to the stop ring .