WO2015127845A1

WO2015127845A1 - Novel waterproof actuator

Info

Publication number: WO2015127845A1
Application number: PCT/CN2015/071965
Authority: WO
Inventors: 黄磊; 李龙
Original assignee: 嘉兴礼海电气科技有限公司
Priority date: 2014-02-25
Filing date: 2015-01-30
Publication date: 2015-09-03

Abstract

A novel waterproof actuator, related to the technical field of modern medical care and household mechatronic apparatus. The actuator comprises: a housing and, arranged within the housing, a main body base (16), an actuating mechanism, a control circuit board (17), and an actuating motor (15). The control circuit board (17) is mounted at a side of the main body base (16). Power supply cables connected respectively to an external power supply and to the actuating motor (15) are provided on the control circuit board (17). The actuating mechanism is mounted within the main body base (16). The actuating motor (15) is connected to the control circuit board (17). A main shaft of the actuating motor (15) is fitted with a turbine (4) of the actuating mechanism. A rear support element (2) is arranged at an extremity of the actuating mechanism. The actuating mechanism and the rear support element (2) are fixed with each other via a clamping ring (18). By having the control circuit board (17) mounted within the housing and connected respectively to the external power supply and to the actuating motor (15) for power supply, and by having two parts of the housing connected by ultrasonic welding, the waterproof actuator is structurally simple and compact, and because it is provided with great tightness, waterproof effects is great, the actuator is applicable in electric chairs and electric beds in the medical and household fields.

Description

A new type of waterproof drive

Technical field

The invention belongs to the technical field of medical care and modern home electromechanical integration equipment, and particularly relates to a novel waterproof drive with simple structure, good waterproof effect and convenient installation.

Background technique

At present, the drive for furniture is widely used in furniture such as electric sofas and electric beds at home, and electric sitting and lying devices such as nursing beds and dental chairs in hospitals are popular because of their convenient operation and diversified functions. The existing drive has many additional accessories and is inconvenient to install, especially in the field of medical care, and has higher requirements for waterproofing.

Summary of the invention

In view of the above problems existing in the prior art, an object of the present invention is to provide a novel waterproof driver having a simple structure, a good waterproof effect, and accurate positioning.

The invention relates to a novel waterproof drive comprising a casing, a body base disposed in the casing, a driving mechanism, a control circuit board and a driving motor, wherein the body base is fixed on the driving motor, characterized in that the control The circuit board is mounted on one side of the main body base, and the control circuit board is provided with a power line respectively connected to the external power source and the driving motor. The driving mechanism is installed in the main body base, and the driving motor is connected with the control circuit board to drive the motor main shaft. For the worm structure, in cooperation with the turbine of the driving mechanism, the driving mechanism is rotated, and the driving mechanism is provided with a rear support member at one end, and the connecting bearing of the driving mechanism and the rear supporting member are fixed by the clamping ring.

The invention relates to a novel waterproof drive, characterized in that the drive mechanism comprises a vortex The wheel, the screw rod, the live bell, the push rod and the push rod bracket are fixed on the outer casing, the left end of the screw rod is connected with the rear support member through a bearing, the turbine is arranged on the screw rod, the turbine and the drive motor main shaft worm Cooperating, the right end of the turbine is provided with a positioning spring, and the positioning spring end is provided with a hook, which is fixed on the main body base by a hook, and the screw rod and the live bell are screwed together, and the right end of the live bell is fixedly connected with the push rod, the screw rod and the live bell and The push rod is connected and placed in the push rod bracket, the right end of the push rod protrudes from the push rod bracket, and is equipped with a pin sleeve, and a stroke assembly is also arranged in the push rod bracket, and the live bell and the push rod are rotated by the screw rod Reciprocating in the pusher bracket.

The invention relates to a novel waterproof drive, characterized in that a second sealing rubber ring is arranged between the outer casing and the push rod bracket.

The invention relates to a novel waterproof drive, characterized in that the rear support member is composed of two upper and lower half support members, and a connecting bearing installation groove for mounting a bearing is arranged inside.

The invention relates to a novel waterproof drive, characterized in that the screw positioning member and the push rod guide sleeve are respectively fixed on both ends of the push rod bracket by screws.

The invention relates to a new type of waterproof drive, characterized in that the inner wall of the live bell is provided with an internal thread matched with the external thread on the screw rod, and the outer wall of the left end of the live bell is provided with a positioning protrusion, and the outer wall of the right end is disposed on the outer wall of the push rod The external thread of the threaded engagement is provided with auxiliary bumps on the upper surface and the lower surface of the positioning protrusion.

The invention relates to a novel waterproof drive, characterized in that a stroke switch is arranged at both ends of the stroke assembly.

The invention relates to a novel waterproof drive, characterized in that the outer casing is provided with one or more protrusions on the upper cover of the outer casing and the lower cover of the outer casing, and the convexity is welded by ultrasonic melting to weld the upper cover of the outer casing and the lower cover of the outer casing.

The invention relates to a new type of waterproof drive, characterized in that the lower cover of the outer casing is provided with a mounting groove, and the corresponding position of the push rod bracket is provided with a buckle, and the lower cover of the outer casing and the push rod bracket are positioned and connected by the buckle and the installation slot.

The invention relates to a novel waterproof drive, characterized in that a sealing rubber ring is arranged between the rear support and the outer casing.

By adopting the above technique, the beneficial effects of the present invention are as follows compared with the prior art:

1) The invention divides the outer casing into two parts, an upper cover and a lower cover, and is constructed by ultrasonic welding, and a sealing rubber ring is arranged between the outer casing and the push rod bracket, which not only facilitates installation, but also greatly improves sealing performance and meets medical treatment. The needs of the technical field to improve the user's safety performance;

2) According to the invention, the rear support members are respectively provided with upper and lower half support members, and bearing mounting grooves are arranged inside for easy installation. After the rear bearing is assembled, the rubber ring is arranged at the fixing portion of the upper and lower outer casing portions to improve the waterproof function. ;

3) The inner wall of the live bell of the invention is screwed to the screw rod, and the right end of the live bell is fixedly connected with the push rod, and the positioning protrusion is mounted on the live bell, and the auxiliary convex block is respectively arranged on the upper surface and the lower surface of the positioning protrusion, and the working bell is operated The live bell runs in the chute in the push rod bracket. When the positioning protrusion moves to the travel switch at the left and right ends of the stroke assembly, the movement is stopped under the action of the stroke switch, and therefore, the travel switch and the positioning protrusion jointly position. The auxiliary bump is a live bell that moves in the sliding groove of the push rod bracket to reduce the running resistance and stabilize the function, and can reduce the noise effect;

4) The present invention is provided with a positioning spring at the right end of the turbine, and a hook is arranged at the other end of the positioning spring, and the end of the positioning spring is fixed on the positioning base by the hook to make the positioning The spring is located between the right end of the turbine and the positioning base. By providing the positioning spring, the friction can be increased. When the spindle of the driving motor stops rotating instantaneously, the turbine can also stop rotating immediately, thereby achieving a better positioning function;

5) According to the invention, the screw rod positioning member and the push rod guide sleeve are arranged at both ends of the push rod bracket to accurately position the screw rod in the circumferential direction, and a control circuit board is installed on the base side of the main body of the driver, thereby saving external installation space. , which saves manufacturing costs and meets functional needs;

6) The invention provides a mounting groove on the lower cover of the outer casing, and the corresponding position of the push rod bracket is provided with a buckle, and the lower cover of the outer casing and the push rod bracket are positioned and connected by the buckle and the mounting groove, and are sealed by a sealing ring to improve the installation thereof. Firmness and sealing, good waterproof performance;

7) The invention adopts the above technology, has the advantages of simple structure, good waterproof effect and accurate positioning, and is widely applicable to the adjustment for installation on electric furniture. Because of its good sealing property, it is particularly suitable for electric chairs and electric beds in the medical field. Wait.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

2 is a schematic structural view of a live bell of the present invention;

Fig. 3 is a schematic view showing the enlarged structure of the connection between the turbine and the drive motor spindle of the present invention.

In the picture: 1-first sealing rubber ring, 2- rear support, 201-bearing mounting groove, 3-connecting bearing, 4-turbo, 5-shell upper cover, 6-second sealing rubber ring, 7-live bell ,701-positioning bulge,702-outer thread,703-internal thread,704-auxiliary bump,8-push rod,9-pin bushing,10-push rod guide sleeve,11-push rod bracket,1101-card Buckle, 12-stroke assembly, 1201-stroke switch, 13-screw positioning rod, 14-shell lower cover, 1401-mounting groove, 15-drive motor, 16-body base, 17-control electrical board, 18-clip Tight ring, 19-screw, 20-position spring, 20a-hook.

detailed description

The present invention is further described below in conjunction with the accompanying drawings:

As shown in Figures 1-3, a novel waterproof drive for mounting on a medical device, a sofa, etc., includes a housing, a body base 16 disposed within the housing, a drive mechanism, a control circuit board 17, and a drive motor 15. The main body base 16 is fixed to a driving motor 15, and the outer casing is provided with one or more protrusions on the outer casing cover 5 and the outer casing lower cover 14, and the convex cover is ultrasonically melted to cause the outer casing cover 5 It is welded with the lower cover 14 of the outer casing, and is ultrasonically welded, the welding is tighter, the sealing is good, and the installation is convenient; the control circuit board 17 is installed in the outer casing and is located on the side of the main body base 16 and is on the control circuit board 17. A power supply line respectively connected to the external power supply and the drive motor 17 is provided, and the external power supply is connected to supply power to the drive motor 15, thereby controlling the operation of the drive mechanism. The drive mechanism is installed in the main body base 16, and the drive motor 15 is driven. The control circuit board 17 is connected, and the main shaft of the driving motor 15 is a worm structure, which cooperates with the turbine 4 of the driving mechanism, and the driving mechanism rotates, and the driving mechanism is provided with a rear end at one end. 2, the driving mechanism and the rear support 2 are fixed by a clamping ring 18; the driving mechanism comprises a turbine 4, a screw rod 19, a bell 7, a push rod 8 and a push rod bracket 11, the push rod The bracket 11 is fixed on the outer casing, and the left end of the screw rod 19 is connected to the rear support member 2 through the bearing 3. The turbine 4 disposed on the screw rod 19 is matched with the main shaft worm of the drive motor 15, and the screw rod 19 and the live bell 7 are screw-fitted, and live The right end of the bell 7 is fixedly connected with the push rod 8. The screw rod 19, the live bell 7 and the push rod 8 are connected and placed in the push rod bracket 11, and the right end of the push rod 8 extends out of the push rod bracket 11 and is equipped with a pin sleeve 9, For connecting with other parts to be driven, the stroke is also set in the push rod bracket 11 The assembly 12, the live bell 7 and the push rod 8 reciprocate in the push rod bracket 11 by the rotation of the screw rod 19, and when the positioning protrusion 701 of the bell 7 moves, it hits the stroke switch 1201 provided on the stroke assembly 12. , stop exercising immediately;

As shown in FIG. 3, the right end of the turbine 4 is sleeved with a positioning spring 20, and the positioning spring 20 is provided with a hook 20a at the end thereof, and is fixed on the main body base 16 by a hook 20a, so that the positioning spring 20 is located between the right end of the turbine and the positioning base. The positioning spring 20 is arranged to increase the friction. When the spindle of the driving motor 15 stops rotating instantaneously, the turbine 4 can also immediately stop rotating, thereby achieving a better positioning function;

Since the driver of the present invention is disposed on a medical device or the like, it is required to be strictly waterproof. In order to improve the waterproof performance thereof, the present invention provides a second sealing rubber ring 6 between the outer casing and the push rod bracket 11, after the A sealing rubber ring 1 is disposed between the support member 2 and the outer casing; the rear support member 2 is configured as a split structure, and is composed of upper and lower half support members; and a connecting bearing for mounting the bearing 3 is disposed inside. After the groove 201 is installed, the bearing 3 is located in the bearing mounting groove 201 and is fixed by the clamp ring 18 to improve stability.

In the working process of the present invention, in order to ensure the accuracy of the movement during the movement of the screw rod 19, the present invention provides a screw positioning member 13 and a push rod guide sleeve 10 at both ends of the push rod bracket 11, both of which are fixed by screws. At both ends of the push rod bracket 11.

As shown in FIG. 2, the inner wall of the bell 7 of the present invention is provided with an internal thread 703 which cooperates with an external thread on the screw shaft 19. The outer wall of the left end of the bell 7 is provided with a positioning protrusion 701, and the outer wall of the right end is disposed on the push rod 8. The external thread 702 of the internal thread is matched, and the upper surface and the lower surface of the positioning protrusion 701 are respectively provided with auxiliary protrusions 704. When installing, the bell 7 is first screwed on the screw rod 19, and the internal thread 703 and the screw rod External thread on 19, live bell 7 right end setting The external thread 702 cooperates with the internal thread of the left end of the push rod 8, and the live bell 7 is fixedly connected with the push rod 8 through the thread, and the screw rod 19, the bell 7 and the push rod 8 are connected to form an integral body. And loading into the push rod bracket 11, the stroke assembly 12 is disposed in the push rod bracket 11, and the end of the stroke assembly 12 is provided with a stroke switch 1201. As shown, the housing lower cover 14 is provided with a mounting groove 1401. The corresponding position of the push rod bracket 11 is provided with a buckle 1101, and the outer casing lower cover 14 and the push rod bracket 11 are positioned and connected with the mounting groove 1401 through the buckle 1101.

This product is installed on high-end electric products such as medical care beds, dental chairs, and leisure sofas. During work, according to the function on the control switch, the lifting and landing of the sitting parts of the bed, such as the bed and the chair, are operated. The specific operation method is: when the function key is pressed, the motor of the drive rotates, through the worm gear and worm device, the drive screw drives the live bell, and then pushes the push rod to perform the push-pull reciprocating motion, and when the body moves to the comfortable position required by the human body, the loosening is performed. Function key.

When the button continues to move, when the bell runs to the second stroke switch position (leftmost or rightmost) of the stroke assembly, the circuit is cut off and the operation stops. This position is not only the maximum working stroke of the drive, but also the safety protection position of the drive. The internal overload protection function, but in case of accidental foreign matter jam, the overheat protection automatically cuts off the power supply, thus maximizing the protection of human body.

Claims

A novel waterproof drive comprises a casing, a body base (16) disposed in the casing, a driving mechanism, a control circuit board (17) and a driving motor (15), wherein the body base (16) is fixed to the driving motor (15) characterized in that the control circuit board (17) is mounted on one side of the main body base (16), and the control circuit board (17) is provided with power lines respectively connected to the external power source and the drive motor (17). The driving mechanism is installed in the main body base (16), the driving motor (15) is connected with the control circuit board (17), and the driving motor (15) main shaft is a worm structure, which cooperates with the turbine (4) of the driving mechanism. The driving mechanism is rotated, and the driving mechanism is provided with a rear supporting member (2) at one end, and the connecting bearing (3) of the driving mechanism and the rear supporting member (2) are fixed by a clamping ring (18).
A novel waterproof drive according to claim 1, wherein said drive mechanism comprises a turbine (4), a lead screw (19), a bell (7), a push rod (8) and a push rod bracket (11). The push rod bracket (11) is fixed on the outer casing, the left end of the screw rod (19) is connected to the rear support member (2) through the bearing (3), and the turbine (4) is arranged on the screw rod (19), the turbine (4) Cooperating with the driving motor (15) spindle worm, the right end of the turbine (4) is provided with a positioning spring (20), and the positioning spring (20) is provided with a hook (20a) at the end, and is fixed to the main body base by a hook (20a). (16) The screw (19) and the live bell (7) are screwed together, and the right end of the bell (7) is fixedly connected with the push rod (8), the screw (19), the live bell (7) and the push rod ( 8) After being connected, it is placed in the push rod bracket (11), the right end of the push rod (8) protrudes from the push rod bracket (11), and is equipped with a pin sleeve (9), and the push rod bracket (11) is also The stroke assembly (12) is set, and the live bell (7) and the push rod (8) reciprocate in the push rod bracket (11) by the rotation of the screw rod (19).
A novel waterproof drive according to claim 2, characterized in that a second sealing rubber ring (6) is arranged between the outer casing and the push rod bracket (11).
A novel waterproof drive according to claim 2, wherein said rear support member (2) is composed of upper and lower half support members; and a connecting bearing for mounting the bearing (3) is disposed inside. Slot (201).
A novel waterproof drive according to claim 2, wherein the screw positioning member (13) and the push rod guide sleeve (10) are both fixed to both ends of the push rod bracket (11) by screws.
A novel waterproof drive according to claim 2, characterized in that the inner wall of the bell (7) is provided with an internal thread (703) which cooperates with an external thread on the screw (19), and the left end outer wall of the bell (7) A positioning protrusion (701) is disposed on the outer wall of the right end, and an external thread (702) is matched with the internal thread on the push rod (8). The upper surface and the lower surface of the positioning protrusion (701) are respectively provided with auxiliary protrusions ( 704).
A novel waterproof drive according to claim 2, characterized in that the end of the stroke assembly (12) is provided with a travel switch (1201).
A novel waterproof drive according to claim 2, wherein said outer casing is provided with one or more projections on the outer casing upper cover (5) and the outer casing lower cover (14), and the projections are melted by ultrasonic waves. The outer casing cover (5) and the outer casing lower cover (14) are welded.
A novel waterproof drive according to claim 8, wherein the lower cover (14) of the outer casing is provided with a mounting groove (1401), and the corresponding position of the push rod bracket (11) is provided with a buckle (1101). The outer casing lower cover (14) and the push rod bracket (11) are positioned and connected to the mounting groove (1401) through the buckle (1101).
A novel waterproof drive according to claim 1, characterized in that a sealing rubber ring (1) is arranged between the rear support (2) and the outer casing.