CN218678708U - Connecting structure of motor assembly and jack - Google Patents

Abstract

The utility model discloses a connection structure of motor assembly and jack, including motor assembly output shaft, linking bridge and the lead screw of rotation setting on the jack, motor assembly output shaft and the hexagonal grafting of lead screw and the two coaxial setting, the linking bridge cover is established outside the lead screw, the linking bridge both ends can be dismantled with motor assembly and jack respectively and be connected. The output shaft of the motor and the screw rod adopt a hexagonal matching mode so as to achieve torque transmission, and meanwhile, the output shaft of the motor is not easy to break and deform to cause failure; on the other hand, motor and jack lead screw pass through linking bridge and fix together, leave suitable clearance again among the above-mentioned hexagonal cooperation, so through linking bridge's location, avoid the transmission of the moment of torsion that motor output shaft and jack lead screw become the angle as far as possible, guarantee the validity of moment of torsion transmission. And a first sealing ring and a second sealing ring are additionally arranged between the motor assembly and the speed reducer and between the motor assembly and the end cover, so that the waterproof and dustproof performance of the motor assembly is improved.

Description

Connecting structure of motor assembly and jack

Technical Field

The utility model relates to an electric automobile trades electric installation technical field, especially relates to a connection structure of motor assembly and jack.

Background

At present, the power supply mode of the power battery of the electric automobile is generally divided into two modes of charging with the automobile and battery replacement, wherein the automobile electricity separation and box separation battery replacement mode is the development direction of new energy automobiles in the future. The split-box battery replacement has a purpose mode of achieving battery replacement by lifting the battery frame, the battery frame is generally installed at the chassis position of the electric automobile, when the battery needs to be replaced, the battery frame is only required to be lowered to the ground, the battery with insufficient electric quantity is pulled out, the fully charged battery is pushed in, and then the battery frame is lifted and retracted to the automobile chassis, so that the battery replacement can be completed. The cost performance, reliability and stability are integrated in the lifting mechanism, and the mode of adopting the electric scissor type jack becomes a better choice. The problem that various manufacturers are difficult to handle is solved by how to transmit the torque by the motor and the jack. The electric jacks on the market have the following connection modes: 1. the screw rod of the jack and the output shaft of the motor are integrally arranged, and the structure has the defects that the installation is difficult during production and the mass production is not suitable; the motor cannot be independently disassembled and inspected, and after-sale maintenance is not facilitated; the motor end sealing performance of the joint is poor, and the motor has the water-involved ablation risk. 2. The jack screw rod and the motor output shaft are usually connected in a spline mode, and the structure has the defect that the spline has failure risk of fracture or deformation when the transmission torque is too large; if precious alloys are used, the system cost rises. Therefore, a new scheme for stabilizing the transmission output of the motor rotating shaft is needed.

For example, a "lifting device and lifting method for a power battery frame of an electric vehicle" disclosed in chinese patent literature includes a lifting frame, a lifting mechanism is connected to a lower end of the lifting frame, a battery frame is fixedly connected to an inner wall of a bottom of the lifting frame through a damping mechanism, a battery body is installed in the battery frame, two fixing plates are symmetrically and fixedly connected to an outer wall of an upper end of the battery body, fixing blocks corresponding to the fixing plates are fixedly connected to an outer wall of the battery frame, and the fixing plates and the fixing blocks are connected through a limiting mechanism. The automobile chassis has the disadvantages that on one hand, the output shaft of the motor is driven by mechanisms such as a gear, a rotating rod and the like, the structure is complex, the size is overlarge, and the automobile chassis is difficult to place due to narrow space; on the other hand, the battery frame lifting device uses a common motor assembly, and the motor assembly is easy to have water immersion fault in a humid environment, so that the battery replacement operation and the normal use of the vehicle are influenced.

Disclosure of Invention

The utility model relates to an it is inconvenient to overcome prior art's motor assembly installation maintenance, and the problem that the transmission moment of torsion easily became invalid provides a motor assembly and jack's connection structure, easy to assemble and maintenance, and the transmission of moment of torsion is reliable and stable.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a connection structure of motor assembly and jack, includes the motor assembly output shaft, still includes linking bridge and rotates the lead screw that sets up on the jack, motor assembly output shaft and lead screw hexagonal grafting and the two coaxial setting, the linking bridge cover is established outside the lead screw, the linking bridge both ends can be dismantled with motor assembly and jack respectively and be connected.

The utility model is characterized in that on one hand, the motor output shaft and the screw rod are arranged in a split way, the motor output shaft and the screw rod adopt a hexagonal square matching mode, so that torque transmission is achieved through the matching, and meanwhile, the motor output shaft is not easy to break and deform to cause failure; on the other hand, motor and jack lead screw pass through linking bridge together fixed, reserve proper clearance again in the above-mentioned hexagonal cooperation, so through linking bridge's location, avoid the transmission of the moment of torsion that motor output shaft and jack lead screw become as far as possible, guarantee the validity of moment of torsion transmission.

Preferably, a hexagonal slot is formed in one end, close to the motor assembly, of the screw rod, an outer hexagonal structure is formed in one end, close to the jack, of an output shaft of the motor assembly, and the output shaft of the motor assembly is in clearance fit with the hexagonal slot.

The splicing fit is convenient to install and disassemble.

Preferably, both ends of the output shaft of the motor assembly are provided with motor bearings.

The front end and the rear end of the motor output shaft are both provided with bearings for bearing support, so that the output shaft is prevented from deforming under large torque.

Preferably, two thrust bearings are arranged on the screw rod, the axial stress directions of the two thrust bearings are opposite, and the screw rod is rotatably connected with the connecting support through the thrust bearings.

Under two kinds of operating mode that the jack ascended and descends, the atress direction is opposite, and two thrust bearings bear the power of two axial directions respectively, further increase the stability of output shaft.

Preferably, a rubber oil seal is arranged between the output shaft of the motor assembly and the motor assembly.

The sealing between the rubber and the shell and the output shaft is realized through the lateral extrusion force of the rubber.

Preferably, one end of the connecting bracket, which is close to the motor assembly, is provided with a flange, and the flange is fixedly connected with the motor assembly through a bolt.

The motor assembly and the jack can be conveniently mounted and dismounted by screwing and loosening the bolts.

Preferably, one end of the connecting bracket, which is close to the jack, is inserted into the jack, and the connecting bracket is fixedly connected with the jack through a bolt.

Save linking bridge occupation space, avoid the inefficacy risk that the lead screw overlength leads to.

Preferably, the motor assembly comprises a motor and a speed reducer connected with the motor, one end of the motor is fixedly connected with the speed reducer, a first sealing ring is arranged between the motor and the speed reducer, an end cover is arranged at one end, far away from the speed reducer, of the motor, a second sealing ring is arranged between the motor and the end cover, and a fixing bolt for connecting the end cover, the motor and the speed reducer is arranged on the motor.

Sealing rings are arranged at two ends of the motor assembly for sealing, and the sealing rings are used as main sealing structures when the motor assembly shell is matched with the end cover and the speed reducer. The fixing bolt simultaneously has fixed end cover and reduction gear on the one hand, and on the other hand sends its deformation to fill the joint gap and reach sealed effect through the fixing bolt to the extrusion force of sealing washer, has improved waterproof dustproof grade.

Therefore, the utility model discloses following beneficial effect has: (1) The output shaft of the motor is matched with the screw rod of the jack in a hexagonal insertion manner, so that reliable and effective transmission of torque is ensured; (2) a connecting bracket is arranged to facilitate assembly and disassembly; (3) By arranging two motor bearings and two thrust bearings, the stability of the output shaft and the lead screw under large torque is improved in the radial direction and the axial direction; and (4) the waterproof and dustproof performance of the motor assembly is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of an internal structure of the present invention.

Fig. 3 is a cross-sectional view of the output shaft of the motor assembly of the present invention.

In the figure: 1. the motor comprises a motor body 11, a motor assembly output shaft 12, a motor bearing 13, a rubber oil seal 14, an end cover 2, a jack 21, a screw rod 211, a hexagonal slot 22, a thrust bearing 3, a connecting support 4, a speed reducer 5 and a fixing bolt.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 and 2, a connection structure of a motor assembly and a jack includes a motor assembly output shaft 11, and further includes a connection bracket 3 and a lead screw 21 rotatably disposed on the jack 2, a hexagonal slot 211 is disposed at one end of the lead screw 21 close to the motor assembly, one end of the motor assembly output shaft 11 close to the jack 2 is of an outer hexagonal structure, the motor assembly output shaft 11 is in insertion fit with the hexagonal slot 211, the connection bracket 3 is of a hollow cylindrical structure, the connection bracket 3 is sleeved outside the lead screw 21, one end of the connection bracket 3 close to the jack 2 is inserted in the jack 2, the connection bracket 3 is fixedly connected with the jack 2 through a bolt, one end of the connection bracket 3 close to the motor assembly is provided with a flange, and the flange is fixedly connected with the motor assembly through a bolt. Two thrust bearings 22 are sleeved outside the screw rod 21, the axial stress directions of the two thrust bearings 22 are opposite, and the thrust bearings 22 are arranged in the connecting bracket 3. As shown in fig. 3, motor bearings 12 are disposed at both ends of the output shaft 11 of the motor assembly. And a rubber oil seal 13 is arranged between the motor assembly output shaft 11 and the motor assembly.

The motor assembly comprises a motor 1 and a speed reducer 4 connected with the motor 1, the bottom end of the motor 1 is fixedly connected with the speed reducer 4, a first sealing ring is arranged between the motor 1 and the speed reducer 4, an end cover 14 is arranged at the top end of the motor 1, and a second sealing ring is arranged between the motor 1 and the end cover 14. The first sealing ring and the second sealing ring are both O-shaped rings. The motor 1 is provided with a fixing bolt 5, one side of the speed reducer 4 close to the motor 1 is provided with a screw hole, and the fixing bolt 5 sequentially penetrates through the end cover 14 and the motor 1 and is in threaded connection with the screw hole. The screw hole is a blind hole, the bottom end of the screw hole is closed, and the screw hole is formed in one side, close to the circle center, of the first sealing ring. And a rubber oil seal 13 is arranged on the output shaft 11 of the motor assembly.

The motor assembly and the jack are fixed by bolts through the connecting support, and meanwhile, a proper gap is reserved between an output shaft of the motor assembly and the inner hexagon of the screw rod. The scheme can eliminate system tolerance, and makes the motor output shaft and the jack screw rod stably and efficiently transmit torque by means of the positioning effect of the connecting bracket. Meanwhile, the output shaft of the motor is prevented from deforming under large torque, and the front end and the rear end of the output shaft are supported by bearings. Two thrust bearings are arranged on the screw rod for axial support, so that the lifting stability of the jack is guaranteed. The motor output shaft position can be sealed through traditional oil blanket result and handled, and fixing bolt has fixed end cover and reduction gear simultaneously on the one hand, and on the other hand sends its deformation to fill the connection gap and reaches sealed effect through fixing bolt to the extrusion force of sealing washer, reaches IP67 waterproof grade and requires to eliminate the risk of wading.

Claims (8)

1. The utility model provides a connection structure of motor assembly and jack, includes motor assembly output shaft (11), characterized by, still includes linking bridge (3) and rotates lead screw (21) of setting on jack (2), motor assembly output shaft (11) are pegged graft and the two coaxial setting with lead screw (21) hexagonal, linking bridge (3) cover is established outside lead screw (21), linking bridge (3) both ends can be dismantled with motor assembly and jack (2) respectively and be connected.

2. The connecting structure of the motor assembly and the jack as claimed in claim 1, wherein a hexagonal socket (211) is provided at one end of the screw rod (21) close to the motor assembly, an outer hexagonal structure is provided at one end of the motor assembly output shaft (11) close to the jack (2), and the motor assembly output shaft (11) is in clearance fit with the hexagonal socket (211).

3. The connecting structure of the motor assembly and the jack as claimed in claim 1, wherein the motor bearings (12) are provided at both ends of the output shaft (11) of the motor assembly.

4. The connecting structure of the motor assembly and the jack as claimed in claim 1, wherein the screw rod (21) is provided with two thrust bearings (22), the axial stress directions of the two thrust bearings (22) are opposite, and the screw rod (21) is rotatably connected with the connecting bracket (3) through the thrust bearings (22).

5. The connecting structure of the motor assembly and the jack as claimed in claim 1, wherein a rubber oil seal (13) is arranged between the motor assembly output shaft (11) and the motor assembly.

6. The connecting structure of the motor assembly and the jack as claimed in claim 1, wherein a flange is provided at one end of the connecting bracket (3) close to the motor assembly, and the flange is fixedly connected with the motor assembly through bolts.

7. The connecting structure of the motor assembly and the jack as claimed in claim 6, wherein one end of the connecting bracket (3) close to the jack (2) is inserted into the jack (2), and the connecting bracket (3) is fixedly connected with the jack (2) through a bolt.

8. The connecting structure of the motor assembly and the jack according to claim 1, wherein the motor assembly comprises a motor (1) and a speed reducer (4) connected with the motor (1), one end of the motor (1) is fixedly connected with the speed reducer (4), a first sealing ring is arranged between the motor (1) and the speed reducer (4), an end cover (14) is arranged at one end of the motor (1) far away from the speed reducer (4), a second sealing ring is arranged between the motor (1) and the end cover (14), and a fixing bolt (5) for connecting the end cover (14), the motor (1) and the speed reducer (4) is arranged on the motor (1).

Images