Electric air pressure rod

Abstract

The electric air pressure rod, comprising Lifting rod consisting of the outer tube of the lifting rod and the inner tube of the lifting rod, wherein the outer tube of the lifting rod can move along the axial direction of the inner tube of the lifting rod, Gas spring arranged inside the lifting rod, consisting of a threaded tube with threads on the outer wall, a piston rod, and a piston, wherein the distance between the piston rod and the inner tube of the lifting rod remains constant, the piston being located at the free end of the piston rod and in a sliding fit with the inner wall of the threaded tube, and wherein a sealing guide assembly is provided between the threaded tube and the piston rod, and a nut adapted to the threaded tube, wherein the nut is arranged at the end of the inner tube of the lifting rod. A drive unit that is fixedly arranged in the outer tube of the lifting rod and serves to drive the threaded tube, so that the threaded tube drives the outer tube of the lifting rod to move along the axial direction of the inner tube of the lifting rod, and Feed tube attached to the outside of the lifting rod, wherein the first guide sleeve is provided between the feed tube and the outer tube of the lifting rod.

Description

TECHNICAL AREA

[0001] The present utility model relates to the technical field of the air pressure rod, in particular to the electric air pressure rod. TECHNICAL BACKGROUND

[0002] The lifting chair is a new type of chair, mainly consisting of a seat plate, a backrest, a lifting mechanism, and chair legs. It can meet the seat height needs of different people. Existing lifting devices generally have electric, pneumatic, or manual structures. Manual lifting devices are often cumbersome to operate and have poor aesthetic performance, making it difficult to meet people's increasing lifestyle demands. Pneumatic lifting devices generally use gas springs with a self-locking structure. This structure is aesthetically pleasing, and the lifting process is relatively smooth. However, the lifting process requires manual operation, and the chair cannot bear excessively heavy loads during manual ascent.For example, with conventional lifting chairs, people must leave the seat cushion before standing up. When descending, they must sit on the chair and exert a certain load on the seat cushion before descending, which makes using the chair uncomfortable. The lifting device of the electric structure usually consists of the motor, the screw rod, the screw rod nut, and the liner. The device drives the screw rod through the motor to rotate for ascent and descent. The entire lifting process is driven by the motor, thereby achieving automatic ascent and descent. However, if the load weight of the seat plates is greater, the motor power must also be increased accordingly. The volume and noise of the high-power motor during operation also increase, which negatively affects the user experience. DETAILED DESCRIPTION

[0003] In order to solve problems existing in the state of the art, the present utility model proposes the electric air pressure rod.

[0004] To achieve the above-mentioned purpose, the present utility model adopts the following technical solutions: The electric air pressure rod, comprising Lifting rod consisting of the outer tube of the lifting rod and the inner tube of the lifting rod, whereby the outer tube of the lifting rod can move along the axial direction of the inner tube of the lifting rod, Gas spring arranged inside the lifting rod and consisting of the threaded tube with thread on the outer wall, the piston rod and the piston, wherein the distance between the piston rod and the inner tube of the lifting rod remains constant, wherein the piston is located at the free end of the piston rod and is in sliding fit with the inner wall of the threaded tube, and wherein a seal guide assembly is provided between the threaded tube and the piston rod, nut which is adapted to the threaded tube, wherein the nut is arranged at the end of the inner tube of the lifting rod, A drive unit fixedly mounted in the outer tube of the lifting rod and used to rotate the threaded tube so that the threaded tube drives the outer tube of the lifting rod to move along the axial direction of the inner tube of the lifting rod, and a casing tube fixed to the outside of the lifting rod, wherein the first guide sleeve is provided between the casing tube and the outer tube of the lifting rod.

[0005] Preferably there is no self-locking between the nut and the threaded pipe.

[0006] Preferably, the outer wall of the inner tube of the lifting rod is provided with the first convex strip, which is evenly distributed along its axis, and the inner wall of the inner tube of the lifting rod is provided along its axis with the evenly distributed first grooves, wherein the second convex strip is provided on the outer wall of the nut, which is adapted to the first groove, wherein the second guide sleeve is provided between the outer tube of the lifting rod and the inner tube of the lifting rod, wherein the second guide sleeve is fixedly connected to the outer tube of the lifting rod, and wherein the second groove is provided on the inner wall of the second guide sleeve, which is adapted to the second convex strip.

[0007] Preferably, the drive unit comprises the motor, the gear box, and the controller, with the output end of the motor driving the threaded tube for rotation through the gear box. Preferably, the end of the inner tube of the lifting rod is provided with the inner tube plug of the lifting rod, which is connected to the end of the piston rod, with the side wall of the inner tube plug of the lifting rod being firmly connected to the inner wall of the inner tube of the lifting rod. Preferably, the third convex strip is provided on the side wall of the inner tube plug of the lifting rod, which is adapted to the first groove.

[0008] Preferably, the end of the casing pipe is fixedly provided with the sealing plate, wherein the end of the inner pipe plug of the lifting rod penetrates the sealing plate and is connected to the sealing plate via a retaining ring.

[0009] Preferably, the seal guide assembly comprises a spacer sleeve, an oil seal, and a rear upper sleeve, with the oil seal located between the spacer sleeve and the rear upper sleeve, and the rear upper sleeve being fixedly connected to the end of the threaded tube. Preferably, the connecting end of the casing tube and the connecting end of the outer tube of the lifting rod are both shaped like a truncated cone.

[0010] The present utility model has the following advantages: 1. In the electric air rod, the motor drives the threaded tube to rotate, allowing the outer tube of the lifting rod to move along the axis of the inner tube of the lifting rod, thus enabling the ascent or descent of the air rod. The threaded tube itself forms a gas spring with the piston rod and piston, so the gas spring has a certain output force and, under identical conditions, can reduce the load on the motor and increase the thrust force when the electric air rod is extended. The motor power of this device is lower than that of the motor in a conventional electric push rod, and a battery can be used for power supply, expanding the application range of the electric air rod. The motor is installed in the outer tube of the lifting rod, making the entire electric air rod compact, easy to install, and aesthetically pleasing. 2. In this electric air spring, the threaded tube, piston rod, and piston form a non-self-locking gas spring. By controlling the rotation of the motor, the rotation of the threaded tube can be limited, automatic locking of the gas spring can be achieved, and the stability of the electric air spring can be improved. DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic three-dimensional structural diagram of the electric air pressure rod of the present utility model. Fig. 2 is a schematic front view of the structure of the electric air pressure rod of the present utility model. Fig. Figure 3 is a schematic cross-sectional structure diagram of AA in Fig. 2 of the electric air pressure rod of the present utility model. Fig. 4 is a schematic three-dimensional structural diagram of the inner tube of the lifting rod of the electric air pressure rod of the present utility model. Fig. 5 is a schematic three-dimensional structural diagram of the nut of the electric air pressure rod of the present utility model. Fig. 6 is a schematic three-dimensional structural diagram of the inner tube plug of the lifting rod of the electric air pressure rod of the present utility model. Fig. 7 is a schematic three-dimensional structural diagram of the second guide sleeve of the electric air pressure rod of the present utility model.

[0011] Description of the main components: 1. Lifting rod outer tube; 2. Lining tube; 3. Lifting rod inner tube; 4. Motor; 5. Gear box; 6. Double ear back plug; 7. Threaded tube; 8. Piston rod; 9. Piston; 10. Nut; 11. Spacer sleeve; 12. Oil seal; 13. Rear upper sleeve; 14. Lifting rod inner tube plug; 15. Tube plug plug cover; 16. Bearing; 17. Retaining ring; 18. Lifting rod outer tube upper sleeve; 19. First guide sleeve; 20. Second guide sleeve; 31. First convex stripe; 32. First groove; 101. Second convex stripe; 141. Third convex stripe; 201. Second groove. SPECIFIC EMBODIMENTS

[0012] Below, the technical solutions in the embodiments of the present utility model are described clearly and comprehensively with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments.

[0013] With reference to Fig. 1 to 7, the electric air pressure rod comprises the following: lifting rod consisting of the outer tube of the lifting rod 1 and the inner tube of the lifting rod 3, wherein the outer tube of the lifting rod 1 can move along the axial direction of the inner tube of the lifting rod 3.

[0014] Gas spring arranged inside the lifting rod and consisting of the threaded tube 7 with thread on the outer wall, the piston rod 8 and the piston 9, wherein the distance between the piston rod 8 and the inner tube of the lifting rod 3 remains constant, wherein the piston 9 is located at the free end of the piston rod 8 and is in sliding fit with the inner wall of the threaded tube 7, and wherein a seal guide assembly is provided between the threaded tube 7 and the piston rod 8.

[0015] Nut 10 adapted to the threaded tube 7, wherein the nut 10 is arranged at the end of the inner tube of the lifting rod 3.

[0016] Drive unit which is fixedly arranged in the outer tube of the lifting rod 1 and serves to rotate the threaded tube 7 so that the threaded tube 7 drives the outer tube of the lifting rod 1 to move along the axial direction of the inner tube of the lifting rod 3.

[0017] Casing tube 2, which is attached to the outside of the lifting rod, wherein the first guide sleeve 19 is provided between the casing tube 2 and the outer tube of the lifting rod 1.

[0018] There is no self-locking between the nut 10 and the threaded tube 7.

[0019] The outer wall of the inner tube of the lifting rod 3 is provided with the first convex strip 31, which is evenly distributed along its axis, and the inner wall of the inner tube of the lifting rod 3 is provided with evenly distributed first grooves 32 along its axis, wherein the second convex strip 101 is provided on the outer wall of the nut 10, which is adapted to the first groove 32, wherein the second guide sleeve 20 is provided between the outer tube of the lifting rod 1 and the inner tube of the lifting rod 3, wherein the second guide sleeve 20 is fixedly connected to the outer tube of the lifting rod 1, and wherein the second groove 201 is provided on the inner wall of the second guide sleeve 20, which is adapted to the second convex strip 101.

[0020] The drive unit comprises motor 4, gear box 5, and controller. The output end of motor 4 drives the threaded tube 7 for rotation through the gear box 5. The controller includes a Hall encoder or other signal feedback unit. The end of the threaded tube 3 can be mounted with a double-ear plug 6, which is connected to the output shaft of the gear box 5 via a matching pin shaft. The output end of the gear box 5 can be connected to the end of the threaded tube 7 via a coupling.

[0021] The end of the inner tube of the lifting rod 3 is provided with the inner tube plug of the lifting rod 14, which is connected to the end of the piston rod 8. The side wall of the inner tube plug of the lifting rod 14 is firmly connected to the inner wall of the inner tube of the lifting rod 3. The bearing 16 is installed between the inner tube plug of the lifting rod and the piston rod 8, and the plugged cover of the tube plug 15 is firmly mounted on the inner tube plug of the lifting rod 14 to axially limit the bearing.

[0022] The third convex strip 141 is provided on the side wall of the inner tube plug of the lifting rod 14, which is adapted to the first groove 32.

[0023] The top of the outer tube of the lifting rod 1 is firmly installed with the upper sleeve of the outer tube of the lifting rod 18.

[0024] The end of the casing pipe 2 is fixedly provided with a sealing plate, wherein the end of the inner pipe plug of the lifting rod 14 penetrates the sealing plate and is connected to the sealing plate via retaining ring 17.

[0025] Seal guide assembly includes spacer sleeve 11, oil seal 12 and rear upper sleeve 13, wherein oil seal 12 is located between the spacer sleeve 11 and the rear upper sleeve 13, and wherein the rear upper sleeve 13 is fixedly connected to the end of the threaded tube 7.

[0026] The connecting end of the casing tube 2 and the connecting end of the outer tube of the lifting rod 1 are both shaped like a truncated cone, meaning that the ends of the casing tube 2 and the outer tube of the lifting rod 1 are arranged at a specific angle. This is the same conical fit as the current conventional connection method for air pressure rods.

[0027] In this electric push rod, the motor 4 drives the threaded tube 7 to rotate, allowing the outer tube of the lifting rod 1 to move along the axial direction of the inner tube of the lifting rod 3, thus achieving the ascent or descent of the push rod. The threaded tube 7 itself forms a gas spring with the piston rod 8 and the piston 9. When the electric push rod extends, the gas spring has a certain output force. Under the same conditions, the load on the motor 4 can be reduced and the thrust force increased. The power of the motor 4 is smaller than that of the motor 4 in the conventional electric push rod. A battery can be used for power supply, which expands the application range of the electric push rod. The motor 4 is installed in the outer tube of the lifting rod 1, making the entire electric push rod compact, easy to install, and aesthetically pleasing.In this electric air pressure rod, the threaded tube 7, piston rod 8, and piston 9 form a non-self-locking gas spring. By controlling the rotation of the motor 4, the rotation of the threaded tube 7 can be limited, automatic locking of the gas spring can be achieved, and the stability of the electric air pressure rod can be improved.

[0028] Although embodiments of the present utility model are described with reference to the accompanying drawings as shown above, those skilled in the art in the technical field to which the present utility model belongs will understand that the present utility model can be embodied in other specific forms without departing from the principle and spirit of the utility model. Various changes, modifications, substitutions, and transformations to these embodiments are intended to be included within the scope of the present utility model.

Claims

[1] The electric air pressure rod, comprising Lifting rod, which consists of the outer tube of the lifting rod and the inner tube of the lifting rod, whereby the outer tube of the lifting rod can move along the axial direction of the inner tube of the lifting rod, Gas spring arranged inside the lifting rod and consisting of the threaded tube with thread on the outer wall, the piston rod and the piston, wherein the distance between the piston rod and the inner tube of the lifting rod remains constant, wherein the piston is located at the free end of the piston rod and is in sliding fit with the inner wall of the threaded tube, and wherein a seal guide assembly is provided between the threaded tube and the piston rod, nut which is adapted to the threaded tube, wherein the nut is arranged at the end of the inner tube of the lifting rod, Drive unit which is fixedly arranged in the outer tube of the lifting rod and serves to drive the threaded tube in rotation, so that the threaded tube drives the outer tube of the lifting rod to move along the axial direction of the inner tube of the lifting rod, and Casing tube which is attached to the outside of the lifting rod, whereby the first guide sleeve is provided between the casing tube and the outer tube of the lifting rod. [2] The electric air pressure rod according to claim 1, characterized by that there is no self-locking between the nut and the threaded pipe. [3] The electric air pressure rod according to claim 2, characterized bythat the outer wall of the inner tube of the lifting rod is provided with the first convex strip which is evenly distributed along its axis, and the inner wall of the inner tube of the lifting rod is provided with the evenly distributed first grooves along its axis, wherein the second convex strip is provided on the outer wall of the nut which is adapted to the first groove, wherein the second guide sleeve is provided between the outer tube of the lifting rod and the inner tube of the lifting rod, wherein the second guide sleeve is fixedly connected to the outer tube of the lifting rod, and wherein the second groove is provided on the inner wall of the second guide sleeve which is adapted to the second convex strip. [4] The electric air pressure rod according to claim 1, characterized by that the drive unit comprises the motor, the gear box and the control system, wherein the output end of the motor drives the threaded tube for rotation through the gear box. [5] The electric air pressure rod according to claim 3, characterized by that the end of the inner tube of the lifting rod is provided with the inner tube plug of the lifting rod, which is connected to the end of the piston rod, whereby the side wall of the inner tube plug of the lifting rod is firmly connected to the inner wall of the inner tube of the lifting rod. [6] The electric air pressure rod according to claim 5, characterized by that the third convex strip is provided on the side wall of the inner tube plug of the lifting rod, which is adapted to the first groove. [7] The electric air pressure rod according to claim 6, characterized by that the end of the casing pipe is firmly provided with a sealing plate, whereby the end of the inner pipe plug of the lifting rod penetrates the sealing plate and is connected to the sealing plate via a retaining ring. [8] The electric air pressure rod according to one of claims 1 to 7, characterized bythat the seal guide assembly comprises a spacer sleeve, an oil seal and a rear upper sleeve, the oil seal being located between the spacer sleeve and the rear upper sleeve, and the rear upper sleeve being fixedly connected to the end of the threaded tube. [9] Electric air pressure rod according to claim 8, characterized by that the connecting end of the casing pipe and the connecting end of the outer pipe of the lifting rod both have the shape of a truncated cone.

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