CN214534288U - One-electric two-drive synchronous driving device - Google Patents

Abstract

The application relates to a synchronous drive device that two electricity were driven relates to the driver field, includes: the shell is hollow and connected with a telescopic mechanism, the telescopic mechanism comprises a screw rod, and one end of the screw rod extends into the shell; the transmission mechanism comprises a first transmission piece which is rotationally connected in the shell, the screw rod is fixedly connected with a second transmission piece, and the first transmission piece and the second transmission piece are staggered gears which are meshed with each other; the linkage rod is arranged between the two shells, and two ends of the linkage rod are respectively connected with the first transmission piece; and the driving mechanism acts on the linkage rod and is used for driving the linkage rod to rotate. This application can drive two telescopic machanisms and go up and down in step through a actuating mechanism, has improved two telescopic machanism's concentricity and has effectively reduced the transmission noise, has reached the effect of cost reduction increase simultaneously.

Description

One-electric two-drive synchronous driving device

Technical Field

The application relates to the field of drivers, in particular to a synchronous driving device driven by one motor and two motors.

Background

With the continuous development and progress of society, at present, electric beds, electric sofas and medical beds all have the function of lifting so as to meet various requirements of users. Wherein beddo, electronic sofa and medical bed all are provided with linear driver, and linear driver includes power supply and telescopic machanism, and telescopic machanism includes lead screw, screw-nut, push rod support and telescopic link, rotates through power supply drive lead screw such as motors, makes screw-nut drive the telescopic link and goes up and down, therefore the driver has played important effect in electronic furniture use. Under the working condition that two drivers need to be lifted synchronously, the two linear drivers are both provided with a driver motor with a Hall, and when the two drivers work simultaneously, a CPU in a control box continuously detects Hall signals of the driver motors and counts. When the Hall values of the two motors are inconsistent, the speed of the motor with the larger Hall value is reduced so that the Hall values of the two motors are the same, and finally the function of synchronizing the two motors is achieved, so that the electric bed is stably and synchronously lifted.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: controlling the synchronous lifting of the two linear drives requires controlling the synchronicity of the two motors by software and hardware in the control box, resulting in higher costs.

SUMMERY OF THE UTILITY MODEL

In order to reduce the cost, the application provides a synchronous driving device driven by one motor and two motors.

The application provides a two synchronous drive devices that drive of electricity adopts following technical scheme:

an electric two-drive synchronous drive device comprising:

the shell is hollow and connected with a telescopic mechanism, the telescopic mechanism comprises a screw rod, and one end of the screw rod extends into the shell;

the transmission mechanism comprises a first transmission piece which is rotationally connected in the shell, the screw rod is fixedly connected with a second transmission piece, and the first transmission piece and the second transmission piece are staggered gears which are meshed with each other;

the linkage rod is arranged between the two shells, and two ends of the linkage rod are respectively connected with the first transmission piece;

and the driving mechanism acts on the linkage rod and is used for driving the linkage rod to rotate.

By adopting the technical scheme, the driving mechanism drives the linkage rod to rotate, the linkage rod drives the first transmission piece to rotate, the second transmission piece is meshed with the first transmission piece to be connected, so that the first transmission piece drives the second transmission piece to rotate, the screw rod rotates around the axis direction of the screw rod, the transmission mechanisms at the two ends of the linkage rod synchronously drive the screw rod to rotate, the telescopic mechanisms move along the linear direction, the two telescopic mechanisms can synchronously lift, and the cost is reduced while the consistency is kept.

Optionally, the driving mechanism includes a rotating motor, an output shaft of the rotating motor is fixedly connected with a first engaging member, a second engaging member is rotatably connected to the housing, the second engaging member is engaged with the first engaging member, a third engaging member is rotatably connected to the housing, the third engaging member is fixedly connected to the second engaging member, and the third engaging member is engaged with the first transmission member.

By adopting the technical scheme, the rotating motor drives the first meshing part to rotate, the second meshing part drives the third meshing part to rotate, and the third meshing part drives the first transmission part to rotate, so that the linkage rod can synchronously drive the screw rod connected with the other end to rotate, and the two telescopic mechanisms can simultaneously lift and descend.

Optionally, the first transmission member includes a face tooth and a helical tooth, the helical tooth is rotatably connected in the housing, the face tooth is fixedly connected with the helical tooth, the helical tooth is engaged with the third engaging member, and the face tooth is engaged with the second transmission member.

By adopting the technical scheme, the rotating motor drives the third meshing part to rotate, the third meshing part drives the helical teeth to rotate, the helical teeth drive the end face teeth to rotate, the linkage rod drives the screw rods at the two ends to synchronously rotate, and the two telescopic mechanisms synchronously lift.

Optionally, non-round holes are formed in the helical teeth and the first transmission piece, the linkage rod is connected in the non-round holes in a penetrating mode, and the cross section of the linkage rod is matched with the non-round holes.

By adopting the technical scheme, the linkage rod drives the two screw rods to synchronously rotate more stably in the rotating process.

Optionally, the linkage rod includes connecting rods respectively connected to the two shells, and an elastic coupling is connected between the two connecting rods.

Through adopting above-mentioned technical scheme, with two connecting rods through connecting elastic coupling, make two connecting rods keep concentric, make two connecting rods keep the uniformity at the rotation in-process, and elastic coupling makes two connecting rods reduce vibrations at the rotation in-process, and two telescopic machanisms of more stable drive of connecting rod go up and down.

Optionally, the linkage rod comprises a rigid rod or a flexible rod connected between the two shells.

By adopting the technical scheme, the characteristics of small rigidity and elasticity of the flexible shaft are utilized, so that the vibration is reduced and the synchronism is improved in the rotating process of the flexible shaft, and the two telescopic mechanisms are more stable and can lift simultaneously.

Optionally, the housing is connected with a braking member sleeved at the output end of the rotating motor, the braking member is elastic, and the braking member is used for providing a braking force opposite to the rotating direction of the output end of the rotating motor for the output end of the rotating motor.

By adopting the technical scheme, when the rotating motor is closed, the output shaft of the rotating motor still has the tendency of continuous rotation due to the inertia force, and the braking piece provides the braking force opposite to the rotating direction of the output end of the rotating motor at the moment, so that the braking time of the output end of the rotating motor is shortened, and the first meshing piece can be stably stopped.

Optionally, the first meshing part and the second meshing part are staggered gears.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present application.

Fig. 2 is a schematic structural diagram of the inside of the housing in the first embodiment of the present application.

Fig. 3 is a schematic structural diagram of a driving mechanism in the first embodiment of the present application.

Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Fig. 5 is a schematic structural diagram of another embodiment of the first transmission member in the first embodiment of the present application.

FIG. 6 is a schematic view of a stopper according to an embodiment of the present invention.

Description of reference numerals: 1. a housing; 2. a telescoping mechanism; 3. a transmission mechanism; 4. a linkage rod; 5. a drive mechanism; 31. a first transmission member; 311. end face teeth; 312. helical teeth; 32. a second transmission member; 51. rotating the motor; 52. a first engaging member; 53. a rotating shaft; 54. a second engaging member; 55. a third engaging member; 56. a non-circular aperture; 41. a connecting rod; 42. an elastic coupling; 6. accommodating grooves; 7. a stopper; 71. an annular base; 72. a central opening; 73. a connecting portion; 74. a brake part.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The linear driver comprises a power source and a telescopic mechanism, the telescopic mechanism comprises a screw rod, a screw nut, a push rod support and a telescopic rod, and the screw rod is driven to rotate by the power source such as a motor, so that the screw nut drives the telescopic rod to lift.

The embodiment of the application discloses a synchronous driving device driven by one motor and two motors.

The first embodiment is as follows:

referring to fig. 1 and 2, the one-electric two-drive synchronous driving device includes two hollow housings 1, the housing 1 is fixedly connected with a telescopic mechanism 2, and the telescopic mechanism 2 can be fixed to the housing 1 by screws, or the telescopic mechanism 2 can be fixed to the housing 1 by slotting on the side wall of the housing 1. The telescopic mechanism 2 comprises a screw rod, and one end of the screw rod extends into the inner cavity of the shell 1. The two shells 1 are internally provided with a transmission mechanism 3, and the transmission mechanism 3 is connected to one end of the screw rod. A linkage rod 4 is connected between the two shells 1, two ends of the linkage rod 4 are respectively connected with a transmission mechanism 3, a driving mechanism 5 is fixed on one of the shells 1, and the driving mechanism 5 is connected with one end of the linkage rod 4 and used for driving the linkage rod 4 to rotate.

When the driving mechanism 5 drives the linkage rod 4 to rotate, the linkage rod 4 can drive the transmission mechanisms 3 in the two shells 1 to synchronously rotate, so that the two telescopic mechanisms 2 are driven to synchronously lift through the transmission mechanisms 3. Therefore, only one switch frame is fixed in any one telescopic mechanism 2, the switch frame is provided with two micro switches, and the micro switches are used for controlling the longest extension amount and the minimum extension amount of the telescopic mechanism 2.

Referring to fig. 2 and 3, for explanation by taking one set of transmission mechanism 3 as an example, the transmission mechanism 3 includes a first transmission member 31 rotatably connected in the housing 1, the first transmission member 31 is rotatably supported in the housing 1 through a bearing, one end of the screw rod extending into the housing 1 is fixedly connected with a second transmission member 32, the first transmission member 31 and the second transmission member 32 are staggered gears engaged with each other, the second transmission member 32 intersects with an axis of the first transmission member 31, preferably, the second transmission member 32 is perpendicular to the axis of the first transmission member 31, and two ends of the linkage rod 4 are respectively connected to the first transmission members 31 in the two housings 1.

In order to limit the axial movement of the second transmission member 32 along the screw rod, in the present embodiment, the second transmission member 32 is connected to the screw rod by riveting; in other embodiments, the second transmission member 32 may also be connected to the screw rod by screwing on the end surface, so that the second transmission member 32 and the screw rod are connected into a whole.

Referring to fig. 4, the driving mechanism 5 includes a rotating motor 51 fixedly connected to one of the housings 1, the rotating motor 51 is fixed to the housing 1 by a screw, the rotating motor 51 is located at an end of the housing 1 away from the telescopic mechanism 2, and an output shaft of the rotating motor 51 is fixedly connected to a first engaging member 52. A rotating shaft 53 is fixedly connected in the housing 1, the rotating shaft 53 is positioned between the rotating motor 51 and the linkage rod 4, the rotating shaft 53 is rotatably connected with a second meshing part 54, and the second meshing part 54 is meshed with the first meshing part 52.

Referring to fig. 4, in the present embodiment, the first meshing member 52 is a worm, and the second meshing member 54 is a worm helical gear, since the worm teeth are continuous helical teeth, the worm and the worm helical gear are gradually engaged and gradually disengaged when being engaged, and since there are more pairs of teeth to be engaged, the impact load is small, the transmission is smooth, and the noise is low. In other embodiments, the first and second engagement members 52, 54 may be staggered gears, such as bevel gears or helical gears.

Referring to fig. 4, the rotating shaft 53 is rotatably connected with a third engaging member 55 in order to drive the linkage rod 4 to rotate, and in order to rotate the third engaging member 55 synchronously when the second engaging member 54 rotates. In the embodiment, the third engaging member 55 and the second engaging member 54 are connected by a structure integrated by mold-opening injection molding; in other embodiments, the third engaging member 55 and the second engaging member 54 may be two separate structures, and the third engaging member 55 and the second engaging member 54 are fixedly connected, so that the second engaging member 54 can drive the third engaging member 55 to rotate synchronously.

In order to enable the second meshing part 54 and the third meshing part 55 to stably rotate, in this embodiment, the second meshing part 54, the third meshing part 55 and the rotating shaft 53 may be connected in a manner that gaskets are respectively sleeved at two ends of the rotating shaft 53, so that the end portions of the second meshing part 54 and the third meshing part 55 are attached to the gaskets, and the second meshing part 54 and the third meshing part 55 are limited in the axial direction; in other embodiments, steps may be added to both ends of second engagement member 54 and third engagement member 55, and bearings are installed on the steps, so that the outer rings of the bearings are fixed to housing 1, thereby limiting the axial movement of second engagement member 54 and third engagement member 55.

Referring to fig. 2 and 4, in the two sets of the first transmission members 31, the first transmission member 31 in the housing 1 for connecting the rotating electric machine 51 includes a face tooth 311 and a helical tooth 312, and the first transmission member 31 in the other housing 1 includes only the face tooth 311. Wherein the helical teeth 312 are rotatably connected in the housing 1, one end of the linkage rod 4 is connected to the helical teeth 312, the helical teeth 312 are engaged with the third engaging member 55, the third engaging member 55 and the helical teeth 312 are helical gears, and the end face teeth 311 are engaged with the second transmission member 32.

In order to enable the helical teeth 312 to synchronously drive the end face teeth 311 to rotate, in this embodiment, the end face teeth 311 and the helical teeth 312 are connected by a structure integrated by mold opening and injection molding, and two ends of the end face teeth 311 and the helical teeth 312 are supported by a housing through bearings; in other embodiments, the face teeth 311 and the helical teeth 312 may be two separate structures, and the face teeth 311 and the helical teeth 312 are fixedly connected. The end face teeth 311 and the oblique teeth 312 are both provided with non-circular holes 56, the cross section of the linkage rod 4 is matched with the non-circular holes 56, and the linkage rod 4 is connected in the non-circular holes 56 in a penetrating manner, in other embodiments, the linkage rod 4 can be connected with the first transmission member 31 integrally or through a fastener.

The second rotating shaft 53 is inclined, thereby preventing the second engaging piece 54 from interfering with the face teeth 311 and enabling the third engaging piece 55 to be better engaged with the helical teeth 312. Because the rotating shaft 53 is inclined, the third engaging member 55 is also inclined, so that when the third engaging member 55 is engaged with the helical teeth 312, an acting force towards the direction close to the end face teeth 311 is applied to the helical teeth 312, and therefore when the end face teeth 311 are engaged with the second transmission member 32 to rotate, the linkage rod 4 can be more stably balanced.

Referring to fig. 5, in other embodiments, the first transmission member 31, the second transmission member 32 and the third engaging member 55 are all bevel gears, and the first transmission member 31 is engaged with the second transmission member 32 and the third engaging member 55 simultaneously, so that the transmitted force is greater and smoother, and the first transmission member 31 and the second transmission member 32 can be made of plastic, so that the device is lighter and the cost is reduced.

Referring to fig. 4, in the present embodiment, when the third engaging member 55 drives the helical teeth 312 to rotate, the linkage rod 4 rotates, the linkage rod 4 drives the end face teeth 311 at both ends to rotate synchronously, and the second transmission member 32 in the other housing 1 rotates synchronously, so that the two telescopic mechanisms 2 can be lifted synchronously.

When the second transmission member 32 in one housing 1 is a face gear, the second transmission member 32 in the other housing 1 is also a face gear with the same reduction ratio and the same number of teeth; in other embodiments, when the second transmission member 32 in one housing 1 is a helical gear, the second transmission member 32 in the other housing 1 is also a helical gear with the same reduction ratio and the same number of teeth.

Referring to fig. 2, in this embodiment, the linkage rod 4 includes connecting rods 41 respectively connected to the two housings 1, one ends of the two connecting rods 41 away from the housings 1 are commonly connected to an elastic coupler 42, one end of the connecting rod 41 away from the elastic coupler 42 is connected to the helical teeth 312, and the elastic coupler 42 is a quincunx elastic coupler, so that the concentricity of the two connecting rods 41 is higher, and noise is reduced; in other embodiments, the linkage rod 4 can also be a rigid rod; in other embodiments, the linkage rod 4 may also be a flexible rod, preferably a flexible shaft.

Referring to fig. 6, in order to make the more stable brake of motor, in this embodiment, housing 1 is used for connecting the lateral wall that rotates motor 51 and has seted up holding tank 6, and 6 cross-sections of holding tank are circular forms and set up, and 6 internal fixations of holding tank have a braking piece 7, and the rotation motor 51 output shaft passes holding tank 6 and wears to establish and stretch into housing 1, and braking piece 7 can overlap and locate the rotation motor 51 output shaft.

Referring to fig. 6, the stopper 7 includes an annular base 71 fixed to an inner wall of the receiving groove 6, and the annular base 71 is provided in a ring shape. The inner wall of the annular base body 71 is integrally connected with at least three braking parts, and the three braking parts are arranged along the circumferential direction of the annular base body 71 at equal intervals, so that the three braking parts can form a central opening 72 for the output shaft of the rotating motor 51 to penetrate through, and the three braking parts are all abutted against the output shaft of the rotating motor 51.

Referring to fig. 6, the braking member includes two connecting portions 73 integrally connected to the inner wall of the annular base 71, the connecting portions 73 are arranged along the radial direction of the annular base 71, and a braking portion 74 is integrally connected to one end of each of the two connecting portions 73 near the central opening 72, and one side of the braking portion 74 facing the output shaft of the rotating motor 51 is arranged in an arc shape, so that the braking portion 74 can be attached to the side wall of the output shaft of the rotating motor 51. Secondly, the braking part has elasticity, and a heat-resistant plastic such as PEEK can be used, so that the braking part 74 provides a braking force opposite to the rotation direction of the output end of the rotating motor 51 by the friction of the braking part 74 with the output shaft of the rotating motor 51.

The implementation principle of the first embodiment is as follows: when using, connect two casing 1 in the stiff end of electric furniture simultaneously, connect two telescopic machanism 2 in the flexible end or the rotation end of electric furniture, two telescopic machanism 2 keep parallel and the branch row in the both sides of electric furniture, through the flexible of control telescopic machanism 2, realize the drive to electric furniture, improve the stability of drive, of course this application is not only limited to being applied to electric furniture field, is applicable to equally in intelligent office equipment (like the elevating table), electric medical equipment (like electric medical bed). When two telescopic mechanisms 2 need to be lifted synchronously, the rotating motor 51 can be started, the output shaft of the rotating motor 51 drives the first meshing part 52 and the second meshing part 54 to rotate, the second meshing part 54 drives the third meshing part 55 to rotate, the inclined teeth 312 are meshed with the third meshing part 55, so that the connecting rods 41 connected to the inclined teeth 312 are driven to rotate, one connecting rod 41 drives the other connecting rod 41 to rotate synchronously through the elastic coupling 42, the two connecting rods 41 drive the two end face teeth 311 to rotate synchronously, the end face teeth 311 drive the second transmission part 32 to rotate, the screw rod rotates around the axis direction of the screw rod, the telescopic mechanisms 2 are driven to lift, and therefore the two telescopic mechanisms 2 can be driven to lift synchronously through one rotating motor 51, the cost is reduced, the synchronous coefficient is higher, and the action of the electric furniture is more stable.

Example two:

the present embodiment is different from the first embodiment in that: the rotating shaft 53 is rotatably connected to the housing 1, and the two ends of the rotating shaft 53 are connected with the bearings, so that the outer ring of the bearing is fixed to the housing 1, the second meshing part 54 and the third meshing part 55 are both fixed to the rotating shaft 53, and therefore when the first meshing part 52 drives the second meshing part 54 to rotate, the third meshing part 55 synchronously rotates, and the linkage rod 4 can synchronously drive the two telescopic mechanisms 2 to lift.

Example three:

the present embodiment is different from the first embodiment in that: the face teeth 311 may also be replaced by a worm and the second transmission 32 may be a worm and helical gear, the worm meshing with the worm and helical gear.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. An electricity two synchronous drive device that drive which characterized in that: the method comprises the following steps:

the device comprises two shells (1), wherein the shells (1) are arranged in a hollow manner, the shells (1) are connected with a telescopic mechanism (2), the telescopic mechanism (2) comprises a screw rod, and one end of the screw rod extends into the shells;

the transmission mechanism (3) comprises a first transmission piece (31) which is rotatably connected in the shell (1), the screw rod is fixedly connected with a second transmission piece (32), and the first transmission piece (31) and the second transmission piece (32) are staggered gears which are meshed with each other;

the linkage rod (4) is arranged between the two shells (1), and two ends of the linkage rod (4) are respectively connected to the first transmission piece (31);

and the driving mechanism (5) acts on the linkage rod (4) and is used for driving the linkage rod (4) to rotate.

2. An electric two-drive synchronous drive device according to claim 1, wherein: the driving mechanism (5) comprises a rotating motor (51), an output shaft of the rotating motor (51) is fixedly connected with a first meshing part (52), a second meshing part (54) is connected in the shell (1) in a rotating mode, the second meshing part (54) is meshed with the first meshing part (52), a third meshing part (55) is connected in the shell (1) in a rotating mode, the third meshing part (55) is fixedly connected to the second meshing part (54), and the third meshing part (55) is meshed with the first transmission part (31).

3. An electric two-drive synchronous drive device according to claim 2, wherein: the first transmission piece (31) comprises end face teeth (311) and inclined teeth (312), the inclined teeth (312) are connected in the shell (1) in a rotating mode, the end face teeth (311) are fixedly connected with the inclined teeth (312), the inclined teeth (312) are meshed with the third meshing piece (55), and the end face teeth (311) are meshed with the second transmission piece (32).

4. An electric two-drive synchronous drive device according to claim 1, wherein: the first transmission piece (31) is provided with a non-circular hole (56), the linkage rod (4) is clamped in the non-circular hole (56) in a penetrating mode, and the cross section of the linkage rod (4) is matched with the non-circular hole (56).

5. An electric two-drive synchronous drive device according to claim 1, wherein: the linkage rod (4) comprises connecting rods (41) respectively connected to the two shells (1), and an elastic coupling (42) is connected between the connecting rods (41).

6. An electric two-drive synchronous drive device according to claim 1, wherein: the linkage rod (4) comprises a rigid rod or a flexible rod connected between the two shells (1).

7. An electric two-drive synchronous drive device according to claim 2, wherein: the shell (1) is connected with a braking piece (7) sleeved on an output shaft of the rotating motor (51), the braking piece (7) is elastic, and the braking piece (7) is used for providing braking force opposite to the rotating direction of the output end of the rotating motor (51) for the output end of the rotating motor (51).

8. An electric two-drive synchronous drive device according to claim 2, wherein: the first meshing part (52) and the second meshing part (54) are staggered gears.

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