CN106115540B - Electric jack - Google Patents

Abstract

The invention relates to a jacking tool, in particular to an electric jack, which comprises a gear box and a motor for driving the gear box to operate, wherein the output end of the gear box is provided with a driving shaft, the lower end of the driving shaft is connected with a lead screw, a lead screw nut is connected onto the lead screw in a threaded manner, an inner pipe is fixed on the outer circumferential surface of the lead screw nut, an outer pipe is sleeved on the outer side of the inner pipe, the upper end part of the outer pipe is fixed at the bottom of the gear box. The product of the invention adopts screw rod transmission, and the service efficiency is increased by more than 70%; the friction plate is adopted to control the descending stop position, so that the problem that the screw rod cannot be locked automatically is solved; the PCB circuit and the motor control the automatic lifting memory function, so that the intelligent control is convenient to operate; novel appearance, simple structure conveniently carries the dismouting.

Description

electric jack

technical field

The invention relates to a jacking tool, in particular to an electric jack.

Background technique

With the development of the economy and the increase of the national GDP, people's living standards are constantly improving, and people's requirements for the quality of life and the comfort of outdoor travel are also constantly improving.

Whenever the RV is fixed in the wild, it is necessary to use a jack. In order to fix the RV faster and safer, we redesigned the product to subvert the original concept.

Contents of the invention

In view of the above problems, the present invention provides an electric jack, which can effectively lift and fix a camping car, reduces unnecessary manual operations in the fixing process, improves camping efficiency, and is convenient to control and carry.

According to the technical solution of the present invention: an electric jack is characterized in that: it includes a gear box and a motor for driving the gear box, the output end of the gear box is provided with a drive shaft, the lower end of the drive shaft is connected to a screw, and the screw is screwed The screw nut, the inner tube is fixed on the outer peripheral surface of the screw nut, the outer tube is sleeved on the outer side of the inner tube, the upper end of the outer tube is fixed on the bottom of the gearbox, and the lower end of the inner tube is connected to the foot support through a bolt; Set the brakes.

As a further improvement of the present invention, the brake device includes a friction plate, a one-way thrust bearing, a torsion spring, a first tile cover, and a second tile cover, wherein the friction plate is arranged at the upper position of the drive shaft, and the second friction plate is arranged in sequence below the friction plate. A tile cover, a one-way thrust bearing, and a first tile cover, the first tile cover is fixedly connected to the drive shaft, and a torsion spring is arranged on the outer surfaces of the first tile cover and the second tile cover.

As a further improvement of the present invention, several through holes are evenly distributed on the surface of the tube body of the foot support from bottom to top, and radial through holes are opened at the lower end of the inner tube. Any through holes are connected by pins.

As a further improvement of the present invention, a motor casing is arranged on the upper part of the motor, and a keypad for controlling the working conditions of the motor is arranged beside the motor casing.

As a further improvement of the present invention, the screw is a ball screw.

The technical effects of the present invention are: the product of the present invention adopts screw drive, which increases the use efficiency by more than 70%; the friction plate is used to control the lowering stop position, which solves the problem that the screw cannot be self-locked; the PCB circuit and the motor control the automatic lifting and memory function, which is convenient Intelligent operation control; novel appearance, simple structure, easy to carry and disassemble.

Description of drawings

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

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

In Fig. 1, it includes a motor casing 1, a gear box 2, a key board 3, a motor 4, a friction plate 5, a plane thrust bearing 6, a torsion spring 7, a braking device 8, a drive shaft 9, a screw 10, a screw nut 11, Outer tube 12, inner tube 13, latch 14, foot support 15, first tile cover 16, second tile cover 17, etc.

As shown in Figure 1, the present invention is an electric jack, comprising a gear box 2 and a motor 4 for driving the gear box 2 to run, the output end of the gear box 2 is provided with a drive shaft 9, and the lower end of the drive shaft 9 is connected to a screw mandrel 10, The screw nut 11 is threaded on the screw mandrel 10, and the inner tube 13 is fixed on the outer peripheral surface of the screw nut 11, and the outer tube 12 is sleeved on the outside of the inner tube 13, and the upper end of the outer tube 12 is fixed on the bottom of the gear box 2, and the inner tube 13 The lower end is connected to the foot support 15 through a bolt 14; a brake device 8 is arranged on the drive shaft 9.

The brake device 8 includes a friction plate 5, a one-way thrust bearing 6, a torsion spring 7, a first tile cover 16, and a second tile cover 17, wherein the friction plate 5 is arranged on the upper position of the drive shaft 9, and the second friction plate 5 is sequentially arranged below the friction plate 5. The tile cover 17, the one-way thrust bearing 6, and the first tile cover 16, the first tile cover 16 is fixedly connected with the drive shaft 9, and the torsion spring 7 is arranged on the outer surfaces of the first tile cover 16 and the second tile cover 17.

The surface of the tube body of the foot support 15 is evenly distributed from bottom to top to provide a number of through holes, and the lower end of the inner tube 13 is provided with radial through holes, and the radial through holes are connected to any through hole on the surface of the tube body of the support through a latch 14. connect.

Screw rod 10 is a ball screw rod

A motor casing 1 is arranged on the top of the motor 4 , and a keypad 3 for controlling the working conditions of the motor 4 is arranged beside the motor casing 1 . The button plate 3 in the product of the present invention has a built-in PCB circuit board, and the automatic lifting and memory function can be realized by the PCB circuit board.

The working process of the present invention is as follows: the motor 4 is controlled by the PCB circuit, the high-speed motor 4 is converted into a high-torque low-speed output through the gearbox 2, and the driving shaft 9 is driven to make the screw 10 rotate, and the screw nut 11 is fixed to the inner tube 13 , the screw nut 11 moves relative to the screw 10, so as to realize the axial movement between the inner tube 13 and the outer tube 12, and finally achieve the function of elongation and shortening. Highly fine-tuned.

Rising process: the plane thrust bearing 6 works, the friction plate 5 is stationary, the brake device 8 separates and rotates, and the screw rod 10 rotates to drive the jack to elongate.

Descending process: the torsion spring 7 is wrapped, and the brake device 8 becomes an integral mechanism. At this time, the friction plate 5 and the brake device 8 move relative to each other to generate sliding friction, and brake at any time.

The product of the present invention is driven by a motor 4 and controlled by a keypad 3, and is stretched or shortened by a screw rod 10 to achieve a support adjustment function.

Claims (4)

1. a kind of motor-driven jack, it is characterised in that：Including gear-box（2）And for driving gear-box（2）The motor of operating （4）, gear-box（2）Output end be arranged drive shaft（9）, drive shaft（9）Lower end connection wire rod（10）, lead screw（10）Upper screw thread connects Meet feed screw nut（11）, feed screw nut（11）External peripheral surface fixes inner tube（13）, inner tube（13）Outside is arranged outer tube（12）, institute State outer tube（12）Gear-box is fixed in upper end（2）Bottom, inner tube（13）Lower end passes through bolt（14）Connect footing bearing（15）； The drive shaft（9）Upper setting brake gear（8）；The brake gear（8）Including friction plate（5）, single thrust bearing（6）、 Torsional spring（7）, the first FE Tiler（16）, the second FE Tiler（17）, wherein friction plate（5）It is set to drive shaft（9）Upper position, friction plate （5）Lower section sets gradually the second FE Tiler（17）, single thrust bearing（6）, the first FE Tiler（16）, first FE Tiler（16）With drive Moving axis（9）It is fixedly connected, torsional spring（7）It is set to the first FE Tiler（16）, the second FE Tiler（17）Outer surface.

2. motor-driven jack as described in claim 1, it is characterised in that：The footing bearing（15）Tube surfaces arrived by down On uniformly open up several through-holes, inner tube（13）Lower end opens up radial through-hole, any of the radial through-hole and bearing tube surfaces Through-hole passes through bolt（14）It is connected.

3. motor-driven jack as described in claim 1, it is characterised in that：The motor（4）Motor housing is arranged in top（1）, Motor housing（1）Side is arranged for controlling motor（4）The keypad of operating mode（3）.

4. motor-driven jack as described in claim 1, it is characterised in that：The lead screw（10）For ball screw.