swl screw lift

Abstract

The application belongs to the technical field of screw rod elevators, and relates to a SWL screw rod elevator, which comprises a base, a shell arranged on the base, an inner shell arranged in the shell, a worm gear structure arranged in the inner shell, a screw rod connected with the center of a worm in the worm gear structure, a movable gear arranged at one end of the worm in the worm gear structure, an input shaft arranged on the shell, a fixed gear arranged on the input shaft and used for engaging with the movable gear, and the inner shell is rotationally connected in the shell around the axis of the fixed gear. In the case that the worm gear box is fixed, the screw rod of the elevator can be inclined at a certain angle, and the lifting in different directions is realized, so that the problem of single lifting angle of the current SWL screw rod elevator is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of screw jacks and relates to an SWL screw jack. Background Technology

[0002] SWL screw jacks are common lifting equipment, mainly used for lifting and lowering goods in various workplaces. Their main features are compact structure, simple operation, convenient maintenance, and long service life. The working principle of an SWL screw jack is that an electric motor drives a worm gear reducer, and the rotation of the worm gear drives the screw to rotate, thus realizing the lifting motion of the jack. The biggest advantage of this type of jack is that it can achieve smooth and precise lifting movements, with low noise, low vibration, and minimal impact on the working environment. SWL screw jacks are widely used in various workplaces, such as warehouses, factories, and docks, for loading and unloading goods, equipment maintenance, and construction. In addition, due to their simple structure and convenient maintenance, they are also often used as lifting mechanisms in elevators, escalators, and other equipment.

[0003] However, SWL screw jacks also have some problems. For example, currently, SWL screw jacks can only perform reciprocating lifting and lowering movements in a direction perpendicular to the chassis, and the screw is often arranged vertically. For certain specific locations, where it is necessary to lift heavy objects at a certain angle or frequently change the lifting tilt angle, the existing SWL screw jacks cannot adequately meet these usage conditions. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an SWL screw jack, wherein the screw of the jack can tilt at a certain angle when the worm gear box is fixed, so as to realize lifting in different directions, thereby solving the problem of fixed and single lifting angle of the current SWL screw jack.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A screw jack includes a base, an outer shell mounted on the base, and an inner shell disposed within the outer shell. A worm gear structure is provided within the inner shell, and a screw is connected to the center of the worm wheel in the worm gear structure. A movable gear is provided at one end of the worm in the worm gear structure. An input shaft is provided on the outer shell, and a fixed gear for meshing with the movable gear is provided on the input shaft. The inner shell is rotatably connected within the outer shell about the axis of the fixed gear.

[0007] Furthermore, an inner shell fixing plate perpendicular to the axis of the fixed gear is provided on the inner shell, and an outer shell fixing plate matching the inner shell fixing plate is provided on the outer shell. Both the outer shell fixing plate and the inner shell fixing plate are provided with at least one positioning hole along the rotation direction of the inner shell. The inner shell fixing plate and the outer shell fixing plate are connected by bolts passing through the positioning holes to limit the rotation of the inner shell.

[0008] Furthermore, the inner shell fixing plate is provided with a positioning hole, and the outer shell fixing plate has a plurality of positioning holes arranged along the rotation direction of the inner shell.

[0009] Furthermore, the outer shell fixing plate is provided with a positioning hole, and the inner shell fixing plate has a plurality of positioning holes arranged along the rotation direction of the inner shell.

[0010] Furthermore, inner shell fixing plates are provided on both sides of the inner shell, namely a left inner shell fixing plate and a right inner shell fixing plate, and the outer shell is provided with corresponding left outer shell fixing plates and right outer shell fixing plates.

[0011] Furthermore, a lower flange and an upper flange are movably connected to the upper and lower end faces of the lead screw.

[0012] Furthermore, both the lower flange and the upper flange are movably connected to the lead screw via pins, and the direction in which the pins penetrate the lead screw is consistent with the axial direction of the fixed gear.

[0013] Furthermore, one end of the lead screw passes through the base and is connected to the lower flange, and the through hole of the base for the lead screw is a strip-shaped hole perpendicular to the axis of the fixed gear.

[0014] Furthermore, a first bearing located on both sides of the turbine is also fitted onto the lead screw.

[0015] Furthermore, the worm gear is mounted inside the inner housing via a second bearing, and the input shaft is mounted on the outer housing via a third bearing.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention provides an SWL screw jack that, by adding a rotating inner and outer shell structure, houses the worm gear structure within the inner shell, which is rotating within the outer shell. A movable gear connected to the worm gear is then connected to a fixed gear on the input shaft. This allows the screw to rotate around the axis of the fixed gear while the worm gear housing is fixed. Consequently, the screw can change its lifting angle as needed, meaning it can tilt at a certain angle to achieve lifting in different directions. This solves the problem of fixed and limited lifting angles in current SWL screw jacks.

[0018] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is an isometric view of the present invention;

[0021] Figure 2 This is a schematic diagram of the state of the present invention.

[0022] Reference numerals: 1. Lower flange, 2. Lead screw, 3. Base, 4. Left outer shell fixing plate, 5. Fixing bolt, 6. Left inner shell fixing plate, 7. Turbine, 8. First bearing, 9. Upper flange, 10. Right inner shell fixing plate, 11. Right outer shell fixing plate, 12. Worm gear, 13. Second bearing, 14. Movable gear, 15. Fixed gear, 16. Input shaft, 17. Third bearing, 18. Inner shell, 19. Outer shell. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Please see Figures 1-2 A screw jack (SWL) includes a base 3, a housing 19 mounted on the base 3, and an inner housing 18 within the housing 19. A worm gear 7 and a first bearing 8 are disposed within the inner housing 18, with a screw 2 positioned at the center of the worm gear 7 and the first bearing 8. A worm 12 is also connected to the outside of the worm gear 7. The worm 12 is mounted within the inner housing 18 via a second bearing 13, and a movable gear 14 for connecting to an input shaft 16 is provided at one end of the worm 12. The input shaft 16 is mounted on the housing 19 via a third bearing 17, and a fixed gear 15 for meshing with the movable gear 14 is provided on the input shaft 16.

[0027] The input shaft 16 controls the worm gear 12 to rotate through the fixed gear 15 and the movable gear 14, thereby driving the turbine 7 to rotate through the worm gear 12, and then driving the lead screw 2 to rise and fall under the rotation of the turbine 7; specifically, the turbine 7 and the lead screw can be connected by a thread.

[0028] The inner shell 18 is rotatably connected to the outer shell 19 around the axis of the fixed gear 15, so as to realize the angle change of the lead screw 2 installed in the inner shell 18;

[0029] Furthermore, an inner shell fixing plate perpendicular to the axis of the fixed gear 15 is provided on the inner shell 18, and an outer shell fixing plate matching the inner shell fixing plate is provided on the outer shell 19. The inner shell fixing plate and the outer shell fixing plate are connected by bolts 5 to limit the rotation of the inner shell 18.

[0030] Specifically, the inner shell fixing plate is provided with a positioning hole, and the outer shell fixing plate has a plurality of positioning holes arranged along the rotation direction of the inner shell 18, preferably 6 positioning holes. By connecting the unique positioning hole on the inner shell fixing plate with different positioning holes on the outer shell fixing plate, the inner shell 18 can be restricted to different positions. The specific usage method is as follows: after the inner shell is rotated to a fixed angle, the inner shell fixing plate is aligned with one of the 6 positioning holes on the outer shell fixing plate and connected by bolts 5 to lock the movement between the inner shell and the outer shell.

[0031] Furthermore, inner shell fixing plates are provided on both sides of the inner shell 18, namely the left inner shell fixing plate 6 and the right inner shell fixing plate 10, and the outer shell 19 is provided with corresponding left outer shell fixing plate 4 and right outer shell fixing plate 11 to ensure the connection stability of the inner shell fixing plate and the outer shell fixing plate.

[0032] In another embodiment, the outer shell fixing plate is provided with a positioning hole, and the inner shell fixing plate has a plurality of positioning holes arranged along the rotation direction of the inner shell 18, preferably 6 positioning holes. By connecting the unique positioning hole on the outer shell fixing plate with different positioning holes on the inner shell fixing plate, the inner shell 18 can be restricted to different positions.

[0033] The lower flange 1 and the upper flange 9 are movably connected to the upper and lower end faces of the lead screw 2. Specifically, the lower flange 1 and the upper flange 9 are movably connected to the lead screw 2 by pins, and the through direction of the pins is consistent with the axis of the fixed gear 15, so that the movably connected flanges can adapt to the surfaces of different objects and avoid motion interference that may occur when the lead screw changes angle.

[0034] Specifically, one end of the lead screw 2 passes through the base 3 and is connected to the lower flange 1. The through hole of the base 3 for the lead screw 2 is a strip-shaped hole perpendicular to the axis of the fixed gear 15 or a large hole with a large range of motion, so as to facilitate the rotation of the lead screw 2.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A SWL screw jack, characterized in that: The device includes a base, an outer shell mounted on the base, and an inner shell disposed within the outer shell. The inner shell contains a worm gear structure, and a lead screw is connected to the center of the worm wheel in the worm gear structure. One end of the worm in the worm gear structure is provided with a movable gear. The outer shell is provided with an input shaft, and a fixed gear for meshing with the movable gear is provided on the input shaft. The inner shell is rotatably connected to the outer shell about the axis of the fixed gear.

2. The SWL screw jack according to claim 1, characterized in that: An inner shell fixing plate perpendicular to the axis of the fixed gear is provided on the inner shell, and an outer shell fixing plate matching the inner shell fixing plate is provided on the outer shell. Both the outer shell fixing plate and the inner shell fixing plate are provided with at least one positioning hole along the rotation direction of the inner shell. The inner shell fixing plate and the outer shell fixing plate are connected by bolts passing through the positioning holes to limit the rotation of the inner shell.

3. The SWL screw jack according to claim 2, characterized in that: The inner shell fixing plate is provided with a positioning hole, and the outer shell fixing plate has a plurality of positioning holes arranged along the rotation direction of the inner shell.

4. The SWL screw jack according to claim 2, characterized in that: The outer shell fixing plate is provided with a positioning hole, and the inner shell fixing plate has a plurality of positioning holes arranged along the rotation direction of the inner shell.

5. The SWL screw jack according to claim 2, characterized in that: Inner shell fixing plates are provided on both sides of the inner shell, namely the left inner shell fixing plate and the right inner shell fixing plate, and the outer shell is provided with corresponding left outer shell fixing plates and right outer shell fixing plates.

6. The SWL screw jack according to claim 1, characterized in that: A lower flange and an upper flange are movably connected to the upper and lower end faces of the lead screw.

7. The SWL screw jack according to claim 6, characterized in that: Both the lower flange and the upper flange are movably connected to the lead screw via pins, and the direction in which the pins penetrate the lead screw is consistent with the axial direction of the fixed gear.

8. The SWL screw jack according to claim 6, characterized in that: One end of the lead screw passes through the base and connects to the lower flange, and the through hole of the base for the lead screw is a strip-shaped hole perpendicular to the axis of the fixed gear.

9. The SWL screw jack according to claim 1, characterized in that: The lead screw is also fitted with first bearings located on both sides of the worm gear.

10. The SWL screw jack according to claim 1, characterized in that: The worm gear is mounted inside the inner housing via a second bearing, and the input shaft is mounted on the outer housing via a third bearing.

Images