CN201008114Y - Quick release device of electric cylinder - Google Patents

Abstract

The utility model provides a quick release device of electronic jar, it includes clutch mechanism, pull mechanism and pulling mechanism, wherein clutch mechanism cup joints respectively and holds and establishes inside the driving screw and the pedestal of electronic jar, and it contains fixing base and clutch, should pull the mechanism and hold and establish inside the casing of electronic jar, and it contains the swing arm of pin joint at the pedestal, the one end of this swing arm is corresponding to the clutch setting, be used for controlling the separation and reunion action between fixing base and the clutch, pulling mechanism contains pull rod group, its one end holds and establishes inside just connecting on the swing arm at the casing, the other end is worn out the casing outside and is connected with the clutch block. This converts the arcuate swing motion into linear motion, thereby greatly reducing the pulling force applied by the operator.

Description

Quick Release Devices for Electric Cylinders

technical field

The utility model relates to a quick release device, in particular to a quick release device for an electric cylinder of an electric hospital bed.

Background technique

It is quite common and common to apply electric cylinders (Actuator) to electric hospital beds, treadmills, wheelchairs, etc., as adjustments for position height or elevation angle. Among them, when doing first aid treatment to patients, there is a quick release device that can quickly release the electric cylinder, so that the hospital bed can be adjusted and changed quickly, so as to strive for the most precious golden rescue time, which is the research of this utility model. important topic.

In the quick-release device of the electric cylinder in the prior art, the electric cylinder has a motor mechanism and a transmission mechanism, the motor mechanism includes a motor and a worm protruding from the center of the motor, and the transmission mechanism includes a lead screw, sleeved One end of the screw and the worm wheel meshed with the aforementioned worm and the base covering one end of the lead screw and the worm wheel. The quick release device mainly uses the pull arm and the cable connected to one end of the pull arm to control the worm wheel and the worm wheel. The clutch action between the worms can achieve the quick release effect of the electric cylinder.

However, the quick-release device of the electric cylinder in the prior art still has the following problems in actual use. The direction of the force exerted by the trigger arm and the cable is constantly changing, resulting in a relatively large force to be applied, making it difficult to pull and use. In addition, the base body is provided with a hole for the trigger arm to penetrate, which often allows moisture or dust to invade the inside of the base body, causing adverse effects such as corrosion of the internal components, and greatly reducing its service life. It really needs to be improved. .

Utility model content

The purpose of this utility model is to provide a quick-release device for an electric cylinder, which is fastened to the swing arm through a pull rod group, and converts the arc-shaped swing into a linear movement, thereby greatly reducing the force exerted by the operator on the cable. pull.

In order to achieve the above object, the utility model provides a quick-release device for an electric cylinder, the electric cylinder has a motor mechanism and a transmission mechanism, the motor mechanism includes a housing, and the transmission mechanism includes a lead screw and one end of the lead screw covered The seat body, the quick release device includes a clutch mechanism, a pulling mechanism and a pulling mechanism, wherein the clutch mechanism is sleeved on the lead screw and accommodated inside the seat body, and it includes a fixed seat and a clutch corresponding to the fixed seat configuration; The pulling mechanism is accommodated inside the casing, and it includes a swing arm pivotally connected to the base, and one end of the swing arm is set corresponding to the clutch to control the clutch action between the fixed seat and the clutch; the pulling mechanism includes a pull rod One end of the group is accommodated inside the casing and connected to the swing arm, and the other end passes through the outside of the casing to connect with the joint block.

Another purpose of the present utility model is to provide a quick-release device for an electric cylinder, which can be fixed in the upper casing by using a pulling mechanism, and then the upper casing is covered and connected to the lower casing, so that the electric cylinder can be greatly simplified. Cylinder assembly process and assembly time.

Another purpose of the present utility model is to provide a quick-release device for an electric cylinder, which is manufactured through the closed integration of the upper and lower casings, and a waterproof gasket is provided between the upper casing and the pull rod, so that the casing The interior of the body has better dustproof, waterproof, moisture-proof and other effects.

Description of drawings

Fig. 1 is the three-dimensional exploded view of electric cylinder of the present utility model;

Fig. 2 is a three-dimensional exploded view of a clutch mechanism and a transmission mechanism of the present invention;

Fig. 3 is a three-dimensional exploded view of the pulling mechanism and the housing of the present invention;

Fig. 4 is the combination schematic diagram of electric cylinder of the present utility model;

Fig. 5 is a combined cross-sectional view of the pulling mechanism of the present invention before it moves;

Fig. 6 is a combined cross-sectional view of the clutch mechanism of the present invention before action;

Fig. 7 is a combined cross-sectional view of the clutch mechanism of the present invention after it is actuated.

In the accompanying drawings, the list of parts represented by each label is as follows:

clutch mechanism 10

Fixed seat 11 positioning block 111

clutch 12 flange 121

Locating groove 122 Groove 123

Spacer 13 Compression spring 14

trigger mechanism 20

Swing arm 21 Column 211

Toggle lever 212

Pull mechanism 30

Tie rod set 31 Tie rod 311

Clamp 312 Clamping plate 32

Elastomer 33 Waterproof gasket 34

Joining block 35 bar groove 351

Auxiliary holding mechanism 40

Ring seat 41 cover plate 42

Room 43

Motor Mechanism 6

Motor 61 Worm 611

Lower shell 62 Upper shell 63

Transmission mechanism 7

Lead screw 71 Left seat body 72

Right seat body 73 worm gear 74

Positioning cylinder 741 Embedding strip 742

Telescopic tube 75 Outer tube 76

Cable set 8 Cable 81

Detailed ways

The detailed description and technical content of the present utility model are described below with accompanying drawings, but the attached drawings are only for reference and description, and are not intended to limit the present utility model.

Figures 1 to 4 are the three-dimensional exploded view of the electric cylinder of the present invention, the three-dimensional exploded view of the clutch mechanism and the transmission mechanism, the three-dimensional exploded view of the pulling mechanism and the housing, and the combined schematic diagram of the electric cylinder. The utility model provides a quick-release device for an electric cylinder. The electric cylinder has a motor mechanism 6 and a transmission mechanism 7. The motor mechanism 6 includes a motor 61, a lower casing 62 covering the outside of the motor 61 and a corresponding cover on the lower casing. The upper housing 63 above the body 62 has a worm 611 protruding from the center of the motor 61 . The transmission mechanism 7 includes a lead screw 71, left and right bases 72, 73 (the bases can also be integrally formed) coated on one end of the lead screw 71, sleeved on the lead screw 71 and intermeshed with the aforementioned worm 611 for transmission. The worm gear 74, the telescopic tube 75 that is screwed on the lead screw rod 71 and can move linearly relative to it, the outer tube 76 that is fixed on the left and right bases 72, 73 and is coated on the outside of the telescopic tube 75, the worm gear The right side of 74 is formed with a positioning cylinder 741 and an embedding strip 742 (as shown in FIG. 2 ). The quick release device includes a clutch mechanism 10 , a pulling mechanism 20 and a pulling mechanism 30 .

Wherein, the clutch mechanism 10 (as shown in FIG. 2 ) is sleeved behind the lead screw 71 and accommodated inside the left and right seat bodies 72, 73, and it includes a fixed seat 11, a clutch 12, a gasket 13 and a compression spring 14. The fixed base 11 is fixed on the lead screw 71 through its central hole and rotates together with it, and a plurality of positioning blocks 111 arranged in a circular arrangement at intervals are formed on the rear side thereof. The clutch 12 is cylindrical, with a circular flange 121 extending outward from the rear of its bottom, and a positioning groove 122 corresponding to the aforementioned positioning block 111 is formed on the inside front of the clutch 12, and is formed on the inner wall of the center hole. There are grooves 123 arranged at intervals, and the grooves 123 are embedded and connected with the embedding strips 742 of the worm wheel 74 . The washer 13 is clamped between the clutch 12 and the corresponding end surface of the positioning cylinder 741 of the worm wheel 74 . The compression spring 14 is sheathed on the outer periphery of the positioning cylinder 741 and is clamped between the corresponding end surfaces of the clutch 12 and the worm wheel 74 .

The pulling mechanism 20 (as shown in FIG. 1 ) is accommodated inside the upper and lower housings 63, 62, and includes a "U"-shaped swing arm 21 pivotally connected to the left and right bases 72, 73. The swing arm 21 A cylinder 211 is formed in the middle of the closed end, and two circular toggle rods 212 protrude from the inner side of the open end respectively. The edge 121 (as shown in FIG. 5 ) is used to control the clutch action between the fixed base 11 and the clutch 12 .

Pulling mechanism 30 (as shown in Figure 3) comprises pull rod group 31, two clamping plates 32, elastic body 33, waterproof washer 34 and joint block 35, and this pull rod group 31 comprises pull rod 311 and is screwed on the rear of pull rod 311 middle section. "U"-shaped clip 312, the opening of which clip 312 is fastened on the cylinder 211 of the swing arm 21 (as shown in FIG. , and the tie rod 311 is fixedly connected to the upper casing 63 with the clamping plate 32 and the screw. The elastic body 33 can be a compression coil spring, which is sleeved on the pull rod 311 and clamped on the corresponding end surfaces of the buckle 312 and the clamping plate 32 . The waterproof gasket 34 is sleeved on the pull rod 311 and fixed on the upper casing 63 to prevent external moisture from intruding into the upper and lower casings 63, 62, thereby effectively achieving a waterproof effect. The engaging block 35 is fixedly connected to the outer end of the pull rod 311 and is formed outside the upper and lower housings 63 , 62 , and two bar-shaped grooves 351 are provided on the engaging block 35 .

In addition, the utility model also includes an auxiliary holding mechanism 40, which is sleeved on the outer tube 76 and attached to the end faces of the aforementioned upper and lower housings 63, 62. The auxiliary holding mechanism 40 includes an annular seat 41 and is pivotally connected to the annular A cover plate 42 on one side of the seat 41 , and an accommodating chamber 43 for accommodating one end of the tie rod set 31 and the joint block 35 is formed between the annular seat 41 and the cover plate 42 .

After the above-mentioned combination, one end of the two cable groups 8 can be threaded and fixed on one side of the ring seat 41 respectively, and one end of the cable 81 of each cable group 8 can be embedded in the bar-shaped groove 351 of the joint block 35, Then cover the cover plate 42 on the ring seat 41 . In this way, an electric cylinder structure can be combined (as shown in Figure 4).

Fig. 5, Fig. 6 and Fig. 7 are respectively the combined sectional view before the action of the pulling mechanism of the present invention, the combined sectional view before the action of the clutch mechanism and the combined sectional view after the action. The electric cylinder of the utility model can be installed on a hospital bed (not shown in the figure), and the worm wheel 74 engaged in the transmission mechanism 7 can be rotated by the rotation of the worm 611 of the motor 61, and at the same time, the lead screw 71 is driven to rotate, and the transmission is carried out on the screw connection. The telescopic tube 75 on it protrudes outwards or retracts inwards, thereby controlling the lifting action of the front section or the rear section of the hospital bed.

When the sick bed needs to be in a horizontal state for first aid treatment for the patient, the cable 81 can be pulled to move the joint block 35, and the pull rod group 31 can be moved linearly protruding outwards, so that the swing arm 21 can be pivoted on its pivot. The joint is swinging at the center of rotation, and the flange 121 of the toggle clutch 12 is disengaged from the connection state with the fixed seat 11 through its toggle lever 212. At this time, the lead screw 71 and the worm wheel 74 are not mutually restrained and can rotate freely. . When an axial thrust is applied to the telescopic tube 75 (or with the help of the weight of the hospital bed), the lead screw 71 can be rotated relative to the telescopic tube 75, so that the telescopic tube 75 can be quickly retracted into the outer tube 26, and To achieve the effect of quick release of the hospital bed.

The implementation described above is a preferred embodiment, and the scope of implementation of the utility model is not limited thereto. Equivalent changes or modifications made according to the scope of protection of the utility model and the contents of the description should all fall within the scope of the utility model.

Claims (10)

1. the fast release device of an electronic cylinder, described electronic cylinder has motor mechanism (6) and transmission mechanism (7), described motor mechanism (6) comprises housing (63), described transmission mechanism (7) comprises driving screw (71) and is coated on the pedestal (72,73) of an end of driving screw (71), it is characterized in that described fast release device comprises:

Clutch (10) is socketed in described driving screw (71) and goes up and be installed with in described pedestal (72,73) inside, the clutch (12) that described clutch (10) comprises holder (11) and disposes corresponding to described holder (11);

Trip gear (20), be installed with in described housing (63) inside, described trip gear (20) comprises the swing arm (21) that is articulated in described pedestal (72,73), one end of described swing arm (21) is provided with corresponding to described clutch (12), in order to control the clutch action between described holder (11) and the described clutch (12); And

Pulling mechanism (30) comprises pull bar group (31), and the one end is installed with in described housing (63) inside and is connected on the described swing arm (21), and the junction piece (35) that the other end passes described housing (63) outside and described pulling mechanism (30) is connected.

2. the fast release device of electronic cylinder as claimed in claim 1, it is characterized in that, described swing arm (21) is " U " shape, be formed with cylinder (211) at its blind end, two poke rods (212) have been protruded out respectively in its openend inboard, each poke rod (212) penetrates each pedestal (72,73) inside, and amplexiforms on described clutch (12).

3. the fast release device of electronic cylinder as claimed in claim 2, it is characterized in that, described pull bar group (31) comprises pull bar (311) and is connected the clip (312) of described pull bar (311), described clip (312) is " U " shape, and its opening snaps onto on the described cylinder (211) of described swing arm (21).

4. the fast release device of electronic cylinder as claimed in claim 3 is characterized in that, described pulling mechanism (30) also includes clamping plate (32), and described clamping plate (32) embedding limit goes up and is fixed at described pull bar (311) and is connected described housing (63) inside.

5. the fast release device of electronic cylinder as claimed in claim 4, it is characterized in that, described pulling mechanism (30) also includes elastomer (33), and described elastomer (33) is socketed in described pull bar (311) and upward and by folder pulls between described clip (312) and described clamping plate (32).

6. the fast release device of electronic cylinder as claimed in claim 5 is characterized in that, described elastomer (33) is a compression helical spring.

7. the fast release device of electronic cylinder as claimed in claim 3 is characterized in that, described pulling mechanism (30) also includes waterproof washer (34), and described waterproof washer (34) is socketed in described pull bar (311) and goes up and be fixed on the described upper shell (63).

8. the fast release device of electronic cylinder as claimed in claim 1 is characterized in that, is provided with two bar-shaped troughs (351) on the described junction piece (35) of described pulling mechanism (30).

9. the fast release device of electronic cylinder as claimed in claim 1 is characterized in that, also includes auxiliary fixing structure (40), and described fixing structure (40) is socketed in described transmission mechanism (7) and goes up and dispose corresponding to described housing (63) one sides.

10. the fast release device of electronic cylinder as claimed in claim 9, it is characterized in that, described fixing structure (40) comprises annular seating (41) and is articulated in the cover plate (42) of described annular seating (41) one sides, is formed with an end of the described pull bar group of confession (31) and the accommodating chamber (43) that described junction piece (35) is installed with between described annular seating (41) and described cover plate (42).

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