Electric jack

Abstract

The utility model relates to an electric jack which comprises a jack support, a top seat, a worm and gear pair and a motor assembly, the top seat is arranged above the jack support, the worm and gear pair is arranged inside the jack support, and the power input end of the worm and gear pair is connected with the motor assembly. The power output end of the worm and gear pair is connected with the top base through a transmission piece, and the motor assembly drives the top base to ascend and descend through the worm and gear pair and the transmission piece. The transmission part comprises a jacking sleeve and a vertical lead screw shaft, the vertical lead screw shaft is rotatably installed in the jack support, and the vertical lead screw shaft is connected with the worm and gear pair and driven by the worm and gear pair to rotate; the top seat is installed at the upper end of the jacking sleeve, and the jacking sleeve is in threaded connection with the vertical lead screw shaft. The worm and gear pair and the motor assembly are matched to form the electric jack, the electric jack is simple in structure and convenient to carry, the self-locking function is achieved through the worm and gear pair, and the jack has the self-locking function.

Description

Technical Field

[0001] This utility model relates to an electric jack. Background Technology

[0002] Jacks can be classified into mechanical jacks and hydraulic jacks according to their working principle. Commonly used lifting jacks include screw jacks, hydraulic jacks, and electric hydraulic jacks.

[0003] Hydraulic jacks, in principle, are based on Pascal's law, which states that the pressure in a fluid is constant throughout. In a balanced system, a smaller piston applies less pressure, while a larger piston applies more pressure, thus maintaining the fluid's stillness. Therefore, by transmitting pressure through the fluid, different pressures can be achieved at different points, thus realizing a force transformation. The hydraulic electric jacks we commonly see utilize this principle to transmit force.

[0004] A screw jack is a device that uses a reciprocating lever to pull the pawl, which in turn drives the ratchet to rotate. The small bevel gear drives the large bevel gear, causing the lifting screw to rotate, thereby raising or lowering the lifting sleeve to achieve the function of lifting and pulling.

[0005] However, current hydraulic jacks require hydraulic oil as an intermediate medium to transmit and convert energy, thus requiring high maintenance standards and posing a fire hazard. They also involve numerous hydraulic transmission components with high precision requirements, complex manufacturing processes, and high costs. Meanwhile, screw jacks lack self-locking capabilities, requiring an additional brake, and their complex and bulky structure makes them inconvenient to carry. Utility Model Content

[0006] This utility model addresses the problems existing in the prior art by providing an electric jack.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an electric jack, comprising a jack support, a top seat, a worm gear pair, and a motor assembly. The top seat is disposed above the jack support, and the worm gear pair is disposed inside the jack support. The power input end of the worm gear pair is connected to the motor assembly, and the power output end of the worm gear pair is connected to the top seat through a transmission component. The motor assembly drives the top seat to rise and fall through the worm gear pair and the transmission component.

[0008] Furthermore, the transmission component includes a lifting sleeve and a vertical lead screw shaft. The vertical lead screw shaft is rotatably installed inside the jack support and is connected to and driven to rotate by a worm gear pair. The top seat is installed on the upper end of the lifting sleeve. The lifting sleeve is sleeved on the outside of the vertical lead screw shaft and threadedly connected to it. The lifting sleeve and the jack support slide vertically together. When the vertical lead screw shaft rotates, it drives the lifting sleeve and the top seat to rise and fall.

[0009] Furthermore, the worm gear pair includes a worm wheel and a worm. The worm wheel is coaxially mounted on the lower end of the vertical lead screw shaft, and the worm is horizontally arranged and meshes with the worm wheel. The worm is driven to rotate by a motor assembly.

[0010] Furthermore, the motor assembly includes a drive motor and a power supply battery. The drive motor is mounted on the lower outer side of the jack support, and the output shaft of the drive motor extends into the jack support and is connected to the worm of the worm gear pair to drive the worm to rotate. The power supply battery is mounted on the end of the drive motor away from the jack support and is used to supply power to the drive motor.

[0011] Furthermore, the power supply battery is a lithium battery.

[0012] Furthermore, the top seat is T-shaped, and its lower end extends into the upper end of the lifting sleeve and is threadedly connected to the lifting sleeve.

[0013] Furthermore, it also includes a fixing device located below the jack support, the fixing device including a vertically arranged fixing rod for insertion into the ground, the lower end of the fixing rod being pointed, and the top of the fixing rod being detachably connected to the bottom of the jack support.

[0014] Furthermore, the fixture also includes a force-bearing plate for contact with the ground, and the force-bearing plate has a long slot in the middle to facilitate the vertical penetration of the fixing rod, and the fixing rod is hinged to the side wall of the long slot by a hinge pin.

[0015] Furthermore, an annular end cap is fixed to the top port of the jack support, and a hinged connecting block is fixed to the outer peripheral side of the annular end cap, with a reinforcing pin hinged to the hinged connecting block.

[0016] Furthermore, the top surface of the top seat is evenly distributed with multiple grooves, which extend along the radial direction of the top seat.

[0017] Compared with the prior art, the present invention has the following advantages: The present invention uses a worm gear pair and a motor assembly to form an electric jack, which has a relatively simple structure and is easy to carry. At the same time, the worm gear pair is used to realize the self-locking function, so that the jack has a self-locking function. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of an embodiment of the present utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model. Figure 1 ;

[0020] Figure 3 This is a three-dimensional structural diagram of an embodiment of the present utility model. Figure 2 ;

[0021] Figure 4 This is a side view of an embodiment of the present invention.

[0022] Figure 5 This is a top view of an embodiment of the present invention.

[0023] In the picture:

[0024] 1-Jack support; 2-Top seat; 3-Worm gear pair; 4-Motor assembly; 5-Transmission component; 6-Lifting sleeve; 7-Vertical lead screw shaft; 8-Worm gear; 9-Worm; 10-Drive motor; 11-Power supply battery; 12-Groove; 13-Lower support; 14-Upper support; 15-Fixing rod; 16-Force plate; 17-Long slot; 18-Hinge pin; 19-Annular end cap; 20-Hinge connecting block; 21-Reinforcing pin; 23-Bearing. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] like Figures 1-5As shown, this utility model discloses an electric jack, comprising a jack support 1, a top seat 2, a worm gear pair 3, and a motor assembly 4. The top seat 2 is positioned above the jack support 1, and the worm gear pair 3 is disposed inside the jack support 1. The power input end of the worm gear pair 3 is connected to the motor assembly 4, and the power output end of the worm gear pair 3 is connected to the top seat 2 via a transmission component 5. The top seat 2 is used to contact the target object, serving as the lifting end of the electric jack. During operation, the motor assembly 4 drives the worm gear pair 3, which in turn drives the transmission component 5 to rise and fall. The transmission component 5 then drives the top seat 2 to rise and fall synchronously, thus enabling the motor assembly 4 to drive the top seat 2 to rise and fall through the worm gear pair 3 and the transmission component 5. The electric jack, formed by the combination of the worm gear pair and the motor assembly, has a relatively simple structure, is easy to carry, and utilizes the worm gear pair to achieve a self-locking function, giving the jack a self-locking effect.

[0028] In this embodiment, the transmission component 5 includes a lifting sleeve 6 and a vertical lead screw shaft 7. The vertical lead screw shaft 7 is rotatably mounted inside the jack support 1 via a bearing 23. The vertical lead screw shaft 7 is connected to and driven to rotate by the worm gear pair 3. The top seat 2 is mounted on the upper end of the lifting sleeve 6. The lifting sleeve 6 is sleeved on the outside of the vertical lead screw shaft 7 and threadedly connected to it. When the vertical lead screw shaft 7 rotates, it drives the lifting sleeve 6 to rise and fall. The upper end of the lifting sleeve 6 extends out of the jack support 1, and the lifting sleeve 6 and the jack support 1 slide vertically together. That is, the vertical lead screw shaft and the lifting sleeve form a lead screw and nut pair. Because the top seat is fixed to the upper end of the lifting sleeve, the lifting sleeve drives the top seat to rise and fall synchronously.

[0029] In this embodiment, the worm gear pair 3 includes a worm wheel 8 and a worm 9. The worm wheel 8 is horizontally positioned (with its axis along the vertical direction) and coaxially mounted on the lower end of the vertical lead screw shaft 7. The worm 9 is horizontally positioned and meshes with the worm wheel 8. The worm 9 is driven to rotate by the motor assembly 4. During operation, the motor assembly drives the worm to rotate, which in turn drives the worm wheel to rotate. Since the worm wheel is fixedly mounted on the vertical lead screw shaft, it drives the vertical lead screw shaft to rotate synchronously. Because the lifting sleeve is threadedly connected to the vertical lead screw shaft, the rotation of the vertical lead screw shaft drives the lifting sleeve to move vertically. By controlling the forward and reverse rotation of the motor assembly, the lifting sleeve can be controlled to rise or fall, thereby completing the lifting action.

[0030] In this embodiment, the motor assembly 4 includes a drive motor 10 and a power supply battery 11. The drive motor 10 is installed on the lower outer side of the jack support 1, and its output shaft extends into the jack support 1 and connects to the worm 9 of the worm gear pair to drive the worm to rotate. The power supply battery 11 is installed at the end of the drive motor 10 away from the jack support 1 and supplies power to the drive motor 10. Furthermore, the power supply battery is a lithium battery, which is more lightweight. The lithium battery and the drive motor 10 together provide power to the electric jack. The drive motor 10 drives the worm gear pair, which in turn drives the lead screw shaft 3 connected to the worm wheel 5, thereby enabling the top seat 1 fixed on the lifting sleeve to lift the target object.

[0031] In this embodiment, the top seat 2 is T-shaped, and the lower end of the top seat 2 extends into the upper end of the lifting sleeve and is threadedly connected to the lifting sleeve 6.

[0032] In this embodiment, the top surface of the top seat 2 is evenly distributed with multiple grooves 12, which extend radially along the top seat. By creating grooves on the top surface of the top seat, the friction between the top seat and the object being lifted is increased, reducing slippage.

[0033] In this embodiment, the jack support 1 includes a rectangular lower support 13 and a cylindrical upper support 14. The upper support 14 is fixed to the top of the lower support 13, and the inner cavity of the upper support 14 is connected to the inner cavity of the lower support 13. The worm gear pair 3 is disposed inside the lower support 13, and the vertical lead screw shaft 7 extends into both the upper support 13 and the lower support 14. The drive motor 10 is fixedly installed on the outer surface of the lower support 13. The lifting sleeve 6 is located inside the upper support 14, and the lifting sleeve 6 and the upper support 14 can form a sliding fit along the vertical direction.

[0034] In this embodiment, to facilitate the fixing of the electric jack in lifting operations on soft ground, the electric jack also includes a fixing device located below the jack support 1. The fixing device includes a vertically arranged fixing rod 15 for insertion into the ground. The lower end of the fixing rod 15 is pointed, and the top of the fixing rod 15 is detachably connected to the bottom of the jack support 1. Furthermore, the top of the fixing rod 15 is connected to the bottom of the lower support 13 of the jack support 1 via a threaded fastener.

[0035] In this embodiment, the fixture also includes a force-bearing plate 16 for contacting the ground. The force-bearing plate 16 has a long slot 17 in the middle to facilitate the vertical penetration of the fixing rod 15. The fixing rod 15 is hinged to the side wall of the long slot 17 through a horizontally arranged hinge pin 18. That is, the force-bearing plate can rotate around the hinge pin to realize the angle adjustment of the force-bearing plate.

[0036] In this embodiment, the top port of the jack support 1 is fixed with an annular end cap 19 by fasteners, the lifting sleeve 6 passes through the inside of the annular end cap 19, and the outer peripheral side of the annular end cap 19 is fixed with a hinged connecting block 20. A reinforcing pin 21 is hinged on the hinged connecting block 20. The reinforcing pin 21 is also used to insert into the ground to strengthen the support.

[0037] This electric jack can be inserted into the ground via a fixed rod, and the load-bearing plate, connected by a hinge, contacts the ground. The angle of the load-bearing plate can then be adjusted arbitrarily, while simultaneously adjusting the tilt angle of the reinforcing pin, providing a solid base for lifting. This fixing method, combining the fixed rod, reinforcing pin, and load-bearing plate, can adapt to lifting operations at multiple angles and in various ground conditions (soft foundations), enabling the jack to perform lifting tasks at various angles and under various working conditions (soft ground).

[0038] It should be noted that in actual use, if the jack is installed on a hard surface, the fixing device can be removed and the jack can be directly supported on the ground by the jack bracket; if it is for a soft foundation or ground, the fixing device should be installed and the fixing rod of the fixing device should be directly inserted into the ground.

[0039] The advantages of this utility model are:

[0040] (1) An electric jack is formed by combining a worm gear pair and a motor assembly. It is easy to carry due to its simple structure. At the same time, the worm gear pair is used to achieve a self-locking function, so that the jack has a self-locking function.

[0041] (2) Realize multi-angle, multi-working-condition (soft foundation) and multi-angle lifting technology.

[0042] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0043] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0044] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An electric jack, characterized in that: The device includes a jack support, a top seat, a worm gear pair, and a motor assembly. The top seat is positioned above the jack support, and the worm gear pair is located inside the jack support. The power input end of the worm gear pair is connected to the motor assembly, and the power output end of the worm gear pair is connected to the top seat via a transmission component. The motor assembly drives the top seat to rise and fall through the worm gear pair and the transmission component.

2. The electric jack according to claim 1, characterized in that: The transmission components include a lifting sleeve and a vertical lead screw shaft. The vertical lead screw shaft is rotatably installed inside the jack support and is connected to and driven to rotate by a worm gear pair. The top seat is installed on the upper end of the lifting sleeve. The lifting sleeve is sleeved on the outside of the vertical lead screw shaft and threadedly connected to it. The lifting sleeve and the jack support slide vertically together. When the vertical lead screw shaft rotates, it drives the lifting sleeve and the top seat to rise and fall.

3. The electric jack according to claim 2, characterized in that: The worm gear pair includes a worm wheel and a worm. The worm wheel is coaxially mounted on the lower end of the vertical lead screw shaft, and the worm is horizontally positioned and meshes with the worm wheel. The worm is driven to rotate by a motor assembly.

4. An electric jack according to claim 1 or 3, characterized in that: The motor assembly includes a drive motor and a power supply battery. The drive motor is mounted on the lower outer side of the jack support, and the output shaft of the drive motor extends into the jack support and is connected to the worm of the worm gear pair to drive the worm to rotate. The power supply battery is mounted on the end of the drive motor away from the jack support and is used to supply power to the drive motor.

5. An electric jack according to claim 4, characterized in that: The power supply battery is a lithium battery.

6. An electric jack according to claim 2, characterized in that: The top seat is T-shaped, and its lower end extends into the upper end of the lifting sleeve and is threadedly connected to the lifting sleeve.

7. An electric jack according to claim 1, characterized in that: It also includes a fixing device located below the jack support, the fixing device including a vertically arranged fixing rod for insertion into the ground, the lower end of the fixing rod being pointed, and the top of the fixing rod being detachably connected to the bottom of the jack support.

8. An electric jack according to claim 7, characterized in that: The fixture also includes a force-bearing plate for contact with the ground. The force-bearing plate has a long slot in the middle to facilitate the vertical penetration of the fixing rod. The fixing rod is hinged to the side wall of the long slot by a hinge pin.

9. An electric jack according to claim 1, characterized in that: The top port of the jack support is fixed with an annular end cap, and the outer circumferential side of the annular end cap is fixed with a hinged connecting block, and a reinforcing pin is hinged on the hinged connecting block.

10. An electric jack according to claim 1, characterized in that: The top surface of the top seat has multiple grooves evenly distributed around its circumference, and the grooves extend along the radial direction of the top seat.

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