Built-in air pressure rod of the engine type
The built-in air pressure rod with an engine type addresses lifting device issues by offering automatic, compact, and stable chair height adjustment with reduced power consumption and noise, suitable for heavier loads.
Patent Information
- Application Number
- DE202025000216
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2024-02-20
- Filing Date
- 2025-01-30
- Publication Date
- 2025-04-03
- Estimated Expiration
- 2035-01-31
AI Technical Summary
Existing lifting devices in chairs, such as electrical, pneumatic, and manual structures, face issues with manual operation, aesthetic performance, weight limitations, and user discomfort due to engine noise and power requirements, especially when handling heavy loads.
A built-in air pressure rod with an engine type, comprising an outer and inner tube, gas spring, drive unit, and guide sleeves, which allows for automatic ascent and descent with reduced engine power, compact design, and improved stability through a non-self-inhibiting gas spring mechanism.
The air pressure rod system provides smooth operation, reduced engine power consumption, and enhanced stability, enabling automatic lifting with minimal user effort and reduced noise, suitable for heavier loads.
Smart Images
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Abstract
Description
TECHNICAL AREA
[0001] The present utility model relates to the technical field of the air pressure rod, in particular to the built-in engine type 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 prior art, the present utility model proposes the built-in motor-type air pressure rod.
[0004] To achieve the above-mentioned purpose, the present utility model adopts the following technical solutions: The built-in engine-type 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, A gas spring arranged inside the lifting rod and consisting of a threaded tube with a thread on the inner wall, a piston, and a piston rod, the distance between the threaded tube and the inner tube of the lifting rod remaining constant, the piston being located at the free end of the piston rod and being in rotation with the inner wall of the threaded tube, and a seal guide assembly being provided between the piston rod and the threaded tube, a drive unit fixedly arranged in the outer tube of the lifting rod and serving to rotate the piston rod, so that the piston rod drives the outer tube of the lifting rod to move along the axial direction of the inner tube of the lifting rod, and Casing pipe which is attached to the outside of the lifting rod, wherein the first guide sleeve is provided between the casing pipe and the outer tube of the lifting rod.
[0005] Preferably, the inner wall of the threaded tube is provided with the threaded projection, wherein the piston is provided with a threaded groove which matches the threaded projection, and wherein there is no self-locking between the piston and the threaded tube.
[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 lower end of the inner tube of the lifting rod is provided with the inner tube plug of the lifting rod, wherein on the side wall of the inner tube plug of the lifting rod the second convex strip is provided, 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, 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 back plug of the threaded pipe is fixedly installed at the end of the threaded pipe, wherein the back plug of the threaded pipe is fixedly connected to the inner pipe plug of the lifting rod. Preferably, one end of the inner pipe plug of the lifting rod is provided with the back plug connecting rod, which is connected to the back plug of the threaded pipe, wherein the other end of the inner pipe plug of the lifting rod is provided with a positioning rod, wherein the end of the casing pipe is fixedly provided with a sealing plate, and wherein the end of the positioning rod penetrates the sealing plate and is connected to the sealing plate via a retaining ring.
[0008] Preferably, the drive unit comprises the motor, the gearbox, and the controller, with the output end of the motor driving the piston rod for rotation through the gearbox. Preferably, the output end of the gearbox is connected to the piston rod via a coupling, with the area on the piston rod between the coupling and the threaded tube being covered with the shock-absorbing cushion.
[0009] Preferably, 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.
[0010] Preferably, 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.
[0011] The present utility model has the following advantages: 1. In the built-in motor-type air push rod, the motor drives the piston rod to rotate, while the piston and threaded tube cooperate with each other to allow the outer tube of the lifting rod to move along the axis of the inner tube of the lifting rod, thus achieving the ascent or descent of the air push rod. The piston rod itself, together with the threaded tube and piston, forms the gas spring. Therefore, the gas spring has a certain output force and, under the same conditions, can reduce the load on the motor and increase the thrust when the built-in motor-type air push rod is extended. The motor power of this device is lower than that of the motor in the conventional electric push rod, and a battery can be used for power supply, which expands the application range of the built-in motor-type air push rod.The motor is installed in the outer tube of the lifting rod, which makes the entire built-in motor type air pressure rod compact, easy to install and beautiful in structure. 2. This motor-type built-in air pressure rod consists of a threaded tube, piston rod, and piston, forming a non-self-locking gas spring. By controlling the rotation of the motor, the rotation of the threaded tube can be limited, automatic locking and unlocking of the gas spring can be realized, and the stability of the gas spring can be improved. DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic three-dimensional structural diagram of the built-in motor type air pressure rod of the present utility model. Fig. 2 is a schematic front view of the structure of the built-in air pressure rod of the motor type of the present utility model. Fig. Figure 3 is a schematic cross-sectional structure diagram of AA in Fig. 2 of the built-in air pressure rod of the motor type of the present utility model. Fig. 4 is a schematic three-dimensional structural diagram of the inner tube of the lifting rod of the built-in motor type air pressure rod of the present utility model. Fig. 5 is a schematic three-dimensional structural diagram of the piston of the built-in air pressure rod of the engine type of the present utility model. Fig. 6 is a schematic front view of the threaded tube structure of the built-in motor type air pressure rod of the present utility model. Fig. 7 is a schematic cross-sectional structure diagram of BB of the built-in motor type air pressure rod of the present utility model. Fig. 8 is a schematic three-dimensional structural diagram of the inner tube plug of the lifting rod of the motor-type built-in air pressure rod of the present utility model. Fig. 9 is a schematic three-dimensional structural diagram of the first guide sleeve of the built-in motor type air pressure rod of the present utility model. Fig. 10 is a schematic three-dimensional structural diagram of the second guide sleeve of the motor-type built-in air pressure rod of the present utility model. Description of the main components:
[0012] 1. Lifting rod outer tube; 2. Lining tube; 3. Lifting rod inner tube; 4. Motor; 5. Gear box; 6. Coupling; 7. Piston rod; 8. Piston; 9. Threaded tube; 10. Shock absorbing pad; 11. Rear upper sleeve; 12. Oil seal; 13. Spacer sleeve; 14. Threaded tube back plug; 15. Lifting rod inner tube plug; 16. Plastic bearing; 17. Back plug connecting rod; 18. First guide sleeve; 19. Lifting rod outer tube upper sleeve; 20. Second guide sleeve; 21. Retaining ring; 31. First convex strip; 32. First groove; 81. Thread groove; 91. Thread boss; 151. Second convex strip; 152. Positioning rod; 201. Second groove. SPECIFIC EMBODIMENTS
[0013] 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.
[0014] With reference to Fig. 1 to 10, the motor-type built-in 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, Gas spring arranged within the lifting rod and consisting of the threaded tube 9 with thread on the inner wall, the piston 8 and the piston rod 7, wherein the distance between the threaded tube 9 and the inner tube of the lifting rod 3 remains constant, wherein the piston 8 is located at the free end of the piston rod 7 and is in a rotary fit with the inner wall of the threaded tube 9, and wherein a seal guide assembly is provided between the threaded tube 9 and the piston rod 7, Drive unit which is fixedly arranged in the outer tube of the lifting rod 1 and serves to rotate the piston rod 7 so that the piston rod 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, and casing tube 2 which is fixed to the outer side of the lifting rod, wherein the first guide sleeve 18 is provided between the casing tube 2 and the outer tube of the lifting rod 1.
[0015] The inner wall of the threaded tube 9 is provided with the threaded projection 91, the piston 8 is provided with a threaded groove 81 that matches the threaded projection 91, and there is no self-locking between the piston 8 and the threaded tube 9.
[0016] 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 along its axis with the evenly distributed first grooves 32, wherein lower end of the inner tube of the lifting rod 3 is provided with the inner tube plug of the lifting rod 15, wherein on the side wall of the inner tube plug of the lifting rod 15, the second convex strip 151 is provided, 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, 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 151.
[0017] Back plug of the threaded pipe 14 is permanently installed at the end of the threaded pipe 9, whereby the back plug of the threaded pipe 14 is permanently connected to the inner pipe plug of the lifting rod 15.
[0018] One end of the inner pipe plug of the lifting rod 15 is provided with the connecting rod for back plug 17 which is connected to the back plug of the threaded pipe 14, the other end of the inner pipe plug of the lifting rod 15 is provided with positioning rod 152, the end of the casing pipe 2 being fixedly provided with the sealing plate, and the end of the positioning rod 152 penetrating the sealing plate and being connected to the sealing plate via a retaining ring 21.
[0019] A plastic bearing 16 is additionally installed between the inner tube plug of the lifting rod 15 and the sealing plate.
[0020] 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 19.
[0021] The drive unit includes the motor 4, the gear box 5, and the controller. The output end of the motor 4 drives the piston rod 7 for rotation through the gear box 5. The gear box 5 is the planetary reduction gear box. The controller includes the Hall encoder or other signal feedback unit. The output end of the gear box 5 can be connected to the end of the piston rod 7 via a coupling 6. The end of the piston rod 7 can be equipped with double-ear back plugs and connected to the output shaft of the gear box 5 by the double-ear back plugs in cooperation with the appropriate pin shaft. The output end of the gear box 5 is connected to the piston rod 7 via a coupling. A shock-absorbing cushion 10 is attached to the piston rod 7 in the area between the coupling 6 and the threaded tube 9.
[0022] Seal guide assembly includes spacer sleeve 13, oil seal 12 and rear upper sleeve 11, wherein the oil seal 12 is located between the spacer sleeve 13 and the rear upper sleeve 11, and wherein the rear upper sleeve 11 is fixedly connected to the end of the threaded tube 9.
[0023] The connecting end of the casing 2 and the connecting end of the outer tube of the lifting rod 1 are both truncated conical, meaning that the ends of the casing 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 of the air pressure rod.
[0024] In the built-in motor-type air push rod, the motor 4 drives the piston rod 7 to rotate, while the piston 8 and threaded tube 9 cooperate with each other to allow the outer tube of the lifting rod 1 to move along the axial direction of the inner tube of the lifting rod 3, thus enabling the ascent or descent of the air push rod. The piston rod 7 itself, together with the threaded tube 9 and piston 8, forms the gas spring. Therefore, the gas spring has a certain output force and, under identical conditions, can reduce the load on the motor 4 and increase the thrust when the built-in motor-type air push rod is extended. The motor power of the motor 4 is lower than that of the motor 4 in the conventional electric push rod, and a battery can be used for power supply, thus expanding the application range of the built-in motor-type air push rod.The motor 4 is installed in the outer tube of the lifting rod 1, which makes the entire built-in air pressure rod of the motor type compact, easy to install and beautiful in structure.
[0025] In this built-in motor-type air pressure rod, the threaded tube 9, piston rod 7, and piston 8 form a non-self-locking gas spring. By controlling the rotation of the motor 4, the rotation of the threaded tube 9 can be limited, automatic locking and unlocking of the gas spring can be realized, and the stability of the gas spring can be improved.
[0026] 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 built-in engine-type 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, A gas spring arranged inside the lifting rod and consisting of a threaded tube with a thread on the inner wall, a piston rod, and a piston, the distance between the threaded tube and the inner tube of the lifting rod remaining constant, the piston being located at the free end of the piston rod and being in rotation with the inner wall of the threaded tube, and a seal guide assembly being provided between the threaded tube and the piston rod, a drive unit fixedly arranged in the outer tube of the lifting rod and serving to rotate the piston rod, so that the piston rod 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 built-in engine-type air pressure rod according to claim 1, characterized by that the inner wall of the threaded tube is provided with the threaded projection, wherein the piston is provided with a threaded groove which matches the threaded projection, and wherein there is no self-locking between the piston and the threaded tube. [3] The built-in engine-type 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 along its axis with the evenly distributed first grooves, wherein the lower end of the inner tube of the lifting rod is provided with the inner tube plug of the lifting rod, wherein the second convex strip is provided on the side wall of the inner tube plug of the lifting rod, which is adapted to the first groove, wherein a second guide sleeve is provided between the outer tube of the lifting rod and the inner tube of the lifting rod, and wherein a second groove is provided on the inner wall of the second guide sleeve, which is adapted to the second convex strip. [4] The built-in engine-type air pressure rod according to claim 3, characterized bythat the back plug of the threaded pipe is firmly installed at the end of the threaded pipe, whereby the back plug of the threaded pipe is firmly connected to the inner pipe plug of the lifting rod. [5] The built-in engine-type air pressure rod according to claim 4, characterized by that one end of the inner pipe plug of the lifting rod is provided with a connecting rod for back plug which is connected to the back plug of the threaded pipe, wherein the other end of the inner pipe plug of the lifting rod is provided with the positioning rod, wherein the end of the casing pipe is fixedly provided with the sealing plate, and wherein the end of the positioning rod penetrates the sealing plate and is connected to the sealing plate via a retaining ring. [6] The built-in engine-type air pressure rod according to claim 5, characterized by that the drive unit comprises the motor, the gearbox and the control system, with the output end of the motor driving the piston rod for rotation through the gearbox. [7] The built-in engine-type air pressure rod according to claim 6, characterized by that the output end of the gearbox is connected to the piston rod via a coupling, whereby the area on the piston rod between the coupling and the threaded tube is covered with the shock-absorbing pad. [8] The built-in engine-type air pressure rod according to any one of claims 1 to 7, characterized by that 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] The built-in engine-type 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.