Motor-equipped pneumatic rod

Abstract

To provide a motor-integrated pneumatic rod, which reduces the load on the motor, increases the thrust, and requires less motor power than that of a conventional electric push rod. [Solution] The motor-integrated pneumatic rod includes a lift rod composed of an outer tube 1 and an inner tube 3, the outer tube of which can move along the axial direction of the inner tube, a threaded tube 9 fixed and installed inside the lift rod and having a screw installed on the outer wall, a gas spring including a piston rod 7 and a piston 8, a drive unit fixed and installed inside the outer tube of the lift rod and used to rotate the piston rod so that the piston rod drives the outer tube of the lift rod to move along the axial direction of the inner tube of the lift rod, and a sleeve tube 2 installed as a sleeve on the outside of the lift rod. In this motor-integrated pneumatic rod, the rotation of the threaded tube is driven via a motor to realize the lifting or lowering of the pneumatic rod.

Description

[Technical field]

[0001] The present invention relates to the technical field of pneumatic rods, in particular to motor-integrated pneumatic rods. [Background technology]

[0002] A lift chair is a new type of chair that mainly consists of a seat plate, a backrest, a lifting device and chair legs, and can meet the needs of different people for seat height. Existing lifting devices are generally electric, aerodynamic and manual. Manual lifting devices are time-consuming and cumbersome to operate, have poor aesthetics, and are difficult to meet people's increasing living demands. Aerodynamic lifting devices are generally gas springs with self-locking structure, which have beautiful structure and relatively smooth lifting process, but the lifting operation needs to be done manually by people, and cannot carry a large load when lifting manually. For example, in the lift chair in the conventional technology, people need to leave the chair cushion when ascending, and can only descend after sitting on the chair and applying a certain load to the chair cushion, which is inconvenient to use. An electrically-driven lifting device generally consists of a motor, a screw, a screw nut, a sleeve tube, etc., and the screw is rotated via the motor to raise and lower the device. The motor provides power for the entire lifting operation, allowing automatic lifting and lowering. However, if the load on the seat is heavy, the motor's power must be increased accordingly, which increases the volume of the high-power motor and increases the noise level during operation, affecting the user's experience. Summary of the Invention [Problem to be solved by the invention]

[0003] The present utility model aims to propose a motorized pneumatic rod to overcome the drawbacks present in the prior art.

[0004] To achieve the above objectives, this utility model adopts the following technical solutions:

[0005] The motor-integrated pneumatic rod is a lift rod including an outer tube and an inner tube, the outer tube being movable along an axial direction of the inner tube; A gas spring including a threaded tube, a piston and a piston rod, which is fixed and installed inside the lift rod and has a screw installed on the inner wall, the distance between the threaded tube and the inner tube of the lift rod does not change, the piston is located at the free end of the piston rod and rotates and fits with the inner wall of the threaded tube, and a seal guide part is installed between the piston rod and the threaded tube; a driving unit fixed and installed inside the outer tube of the lifting rod and used to drive the rotation of 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; The lift rod is provided with a sleeve tube, and a first guide sleeve is provided between the sleeve tube and the outer tube of the lift rod.

[0006] Preferably, a thread protrusion is provided on the inner wall of the threaded tube, and a thread groove that matches the thread protrusion is provided on the piston, so that the piston and the threaded tube cannot self-lock.

[0007] Preferably, the outer wall of the inner tube of the lift rod is provided with first ridges that are evenly distributed along its axis, and the inner wall of the inner tube of the lift rod is provided with first grooves that are evenly distributed along its axis; A lift rod inner tube plug is provided at the lower end of the lift rod inner tube, and a second protrusion is provided on the side wall of the lift rod inner tube plug, the second protrusion being matched with the first groove; A second guide sleeve is installed between the outer tube of the lift rod and the inner tube of the lift rod, and a second groove is installed on the inner wall of the second guide sleeve, which fits the second ridge.

[0008] Preferably, a threaded pipe rear plug is fixedly attached to the end of the threaded pipe, and the threaded pipe rear plug is fixedly connected to an inner pipe plug of a lift rod.

[0009] Preferably, a rear plug connecting rod connected to the threaded pipe rear plug is installed at one end of the inner pipe plug of the lift rod, a positioning rod is installed at the other end of the inner pipe plug of the lift rod, a seal plate is fixed and installed at the end of the sleeve pipe, and the positioning rod penetrates the seal plate and is connected to the seal plate via a circlip.

[0010] Preferably, the driving unit includes a motor, a gearbox and a controller, and the output end of the motor drives the screw tube to rotate via the gearbox.

[0011] Preferably, the output end of the gear box is connected to a piston rod through a coupling, and a vibration damping pad is installed in an area of ​​the piston rod located between the coupling and the threaded tube.

[0012] Preferably, the seal guide component comprises a spacer sleeve, an oil seal, and a rear top sleeve, the oil seal being located between the spacer sleeve and the rear top sleeve, and the rear top sleeve being fixed and connected to an end of the threaded pipe.

[0013] Preferably, the connecting end of the sleeve tube and the connecting end of the outer tube of the lift rod are both truncated. Effect of the Invention

[0014] The effects of this utility model are as follows: 1. In this motor-integrated pneumatic rod, the motor drives the screw tube to rotate, and the piston and screw tube work together to allow the outer tube of the lifting rod to move along the axial direction of the inner tube of the lifting rod, so as to realize the rise or fall of the pneumatic rod. The piston rod itself, together with the piston and screw tube, etc., constitutes a gas spring, so that when the motor-integrated pneumatic rod is extended, the gas spring has a certain output force, which can reduce the load on the motor and increase the thrust under the same conditions. Since the motor power is smaller than that of the traditional electric actuator motor, it can be powered by the battery during the use, which expands the scope of use of the motor-integrated pneumatic rod. The motor is installed inside the outer tube of the lifting rod, so the overall structure of the motor-integrated pneumatic rod is compact, easy to install, and beautiful in structure. 2. In this motor-built-in pneumatic rod, the threaded tube, piston rod and piston etc. constitute a non-lockable gas spring. By controlling the rotation of the motor, the rotation of the threaded tube can be limited, and the automatic locking and unlocking operation of the gas spring can be realized. The gas spring is easy to use and reliable. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a schematic diagram showing the three-dimensional structure of a motor-integrated pneumatic rod proposed by the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing the front structure of a motor-integrated pneumatic rod proposed by the present invention. [Diagram 3] 3 is a schematic diagram showing the cross-sectional structure of the motor-integrated pneumatic rod proposed by the present utility model taken along line AA in FIG. 2. FIG. [Figure 4] FIG. 2 is a schematic diagram showing the three-dimensional structure of the inner tube of the lift rod in the motor-embedded pneumatic rod proposed by this utility model. [Diagram 5] FIG. 2 is a schematic diagram showing the three-dimensional structure of a piston of a motor-integrated pneumatic rod proposed by this utility model. [Figure 6]FIG. 2 is a schematic diagram showing the front structure of the screw tube of the motor-integrated pneumatic rod proposed by this utility model. [Figure 7] 1 is a schematic diagram showing the BB cross-sectional structure of a motor-integrated pneumatic rod proposed by this utility model. [Figure 8] FIG. 2 is a schematic diagram showing the three-dimensional structure of the inner tube of the lift rod in the motor-embedded pneumatic rod proposed by this utility model. [Figure 9] 1 is a schematic diagram showing the three-dimensional structure of a first guide sleeve of a motor-integrated pneumatic rod proposed by this utility model. FIG. [Figure 10] 1 is a schematic diagram showing the three-dimensional structure of a second guide sleeve of a motor-integrated pneumatic rod proposed by this utility model. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part, not all, of the embodiments of the present utility model.

[0017] Referring to Figures 1 to 10, the motor-integrated pneumatic rod is: A lift rod is composed of an outer tube 1 and an inner tube 3, and the outer tube 1 can move along the axial direction of the inner tube 3; A gas spring including a threaded tube 9, a piston 8 and a piston rod 7, which is fixed and installed inside the lift rod and has a thread installed on the inner wall thereof, a piston 8 and a piston rod 7, the distance between the threaded tube 9 and the inner tube 3 of the lift rod does not change, the piston 8 is located at the free end of the piston rod 7 and is rotationally fitted with the inner wall of the threaded tube 9, and a seal guide part is installed between the piston rod 7 and the threaded tube 9; a drive unit fixed and installed inside the outer tube 1 of the lifting rod and used to drive the rotation of the piston rod 7 so that the piston rod 7 drives the outer tube 1 of the lifting rod to move along the axial direction of the inner tube 3 of the lifting rod; The lift rod is provided with a sleeve tube 2 which is sleeve-mounted on the outside of the lift rod and has a first guide sleeve 18 disposed between the sleeve tube 2 and the outer tube 1 of the lift rod.

[0018] A threaded protrusion 91 is provided on the inner wall of the threaded tube 9, and a thread groove 81 that fits the threaded protrusion 91 is provided on the piston 8, so that the piston 8 and the threaded tube 9 cannot self-lock.

[0019] The outer wall of the inner tube 3 of the lift rod is provided with first ridges 31 evenly distributed along its axis, and the inner wall of the inner tube 3 of the lift rod is provided with first grooves 32 evenly distributed along its axis; The lower end of the inner tube 3 of the lift rod is provided with the inner tube plug 15 of the lift rod, and the side wall of the inner tube plug 15 of the lift rod is provided with a second protrusion 151 that fits with the first groove 32; A second guide sleeve 20 is installed between the outer tube 1 of the lift rod and the inner tube 3 of the lift rod, and a second groove 201 that fits the second protrusion 151 is installed on the inner wall of the second guide sleeve 20.

[0020] A threaded pipe rear plug 14 is fixedly attached to the end of the threaded pipe 9, and the threaded pipe rear plug 14 is fixedly connected to an inner pipe plug 15 of the lift rod.

[0021] A rear plug connecting rod 17 connected to the threaded pipe rear plug 14 is installed at one end of the inner pipe plug 15 of the lift rod, and a positioning rod 152 is installed at the other end of the inner pipe plug 15 of the lift rod. A seal plate is fixed and installed at the end of the sleeve pipe 2, and the positioning rod 152 penetrates the seal plate and is connected to the seal plate via a circlip 21.

[0022] A plastic bearing 16 is further installed between the inner pipe plug 15 of the lift rod and the seal plate.

[0023] A top sleeve 19 of the lift rod outer tube is fixedly attached to the top end of the lift rod outer tube.

[0024] The driving unit includes a motor 4, a gearbox and a controller. The output end of the motor 4 drives the screw tube 7 to rotate through the gearbox 5. The gearbox 5 is a planetary reduction gearbox, and the controller is a Hall encoder or other signal feedback unit. The output end of the gearbox 5 is connected to the end of the piston rod 7 through a coupling 6. The end of the piston rod 7 may be fitted with a double-eared rear plug, which is connected to the output shaft of the gearbox 5 through matching with the pin shaft.

[0025] The output end of the gear box 5 is connected to a piston rod 7 via a coupling, and a vibration damping pad 10 is installed in the area of ​​the piston rod 7 located between the coupling 6 and the threaded tube 9.

[0026] The seal guide part includes a spacer sleeve 13, an oil seal 12, and a rear top sleeve 11, the oil seal 12 being located between the spacer sleeve 13 and the rear top sleeve 11, and the rear top sleeve 11 being fixed and connected to the end of the threaded pipe 9.

[0027] The connecting end of the sleeve tube 2 and the connecting end of the outer tube 1 of the lift rod are both in the shape of a circular truncated disk. That is, the ends of the sleeve tube 2 and the outer tube 1 of the lift rod have a set angle for taper fitting, similar to the current conventional pneumatic rod connecting method.

[0028] In this motor-integrated pneumatic rod, the rotation of the screw tube 7 is driven through the motor 4, and the piston 8 and the screw tube 9 work together to allow the outer tube 1 of the lift rod to move along the axial direction of the inner tube 3 of the lift rod, thereby realizing the rise or fall of the pneumatic rod. The piston rod 7 itself, together with the piston 8 and the screw tube 9, constitutes a gas spring, and when the motor-integrated pneumatic rod is extended, the gas spring has a certain output force, which can reduce the load on the motor 4 and increase the thrust under the same conditions. Since the power of the motor 4 is smaller than that of the motor 4 of the conventional electric actuator, it can be powered by a battery during the use process, thereby expanding the scope of use of the motor-integrated pneumatic rod. Since the motor 4 is installed inside the outer tube 1 of the lift rod, the overall structure of the motor-integrated pneumatic rod is compact, easy to install, and beautiful in structure.

[0029] In this motor-integrated pneumatic rod, the threaded tube 9, the piston rod 7, the piston 8, etc. constitute a non-lockable gas spring, and by controlling the rotation of the motor 4, the rotation of the threaded tube 9 can be limited, thereby realizing the automatic locking and unlocking operation of the gas spring 4, and the gas spring is easy to use and highly reliable.

[0030] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent replacement or modification made by a person skilled in the art based on the technical solution of the present utility model and the idea of ​​the utility model within the technical scope disclosed by the present utility model should be included in the protection scope of the present utility model. [Explanation of symbols]

[0031] 1. Outer tube of lift rod 2 Sleeve pipe 3. Lift rod inner tube 4 Motor 5 Gearbox 6 Coupling 7 Piston rod 8 Piston 9 Threaded Pipe 10 Vibration Damping Pads 11 Rear Top Sleeve 12 Oil seal 13 Spacer sleeve 14 Threaded pipe rear plug 15 Lift rod inner pipe plug 16 Plastic Bearings 17 Rear plug connecting rod 18 First guide sleeve 19 Top cover of outer tube of lift rod 20 Second guide sleeve 21 Circlip 31 First convex strip 32 First Groove 81 Thread groove 91 Screw protrusion 151 Second convex stripe 152 Positioning rod 201 Second Groove

Claims

1. A motor-integrated pneumatic rod, a lift rod including an outer tube and an inner tube, the outer tube being movable along an axial direction of the inner tube; A gas spring including a threaded tube, a piston and a piston rod, the threaded tube being fixed and installed inside the lift rod and having a screw installed on the inner wall thereof, the distance between the threaded tube and the inner tube of the lift rod does not change, the piston is located at the free end of the piston rod and is rotationally fitted with the inner wall of the threaded tube, and a seal guide part is installed between the piston rod and the threaded tube; a drive unit fixed and installed inside the outer tube of the lift rod, and used to drive the rotation of the piston rod, so that the piston rod can drive the outer tube of the lift rod to move along the axial direction of the inner tube of the lift rod; a sleeve tube that is sleeve-mounted on the outside of the lift rod and has a first guide sleeve disposed between the sleeve tube and an outer tube of the lift rod.

2. The motor-integrated pneumatic rod according to claim 1, characterized in that a threaded protrusion is provided on the inner wall of the threaded tube, and a thread groove is provided on the piston to match the threaded protrusion, so that the piston and the threaded tube cannot self-lock.

3. The outer wall of the inner tube of the lift rod is provided with first ridges that are evenly distributed along its axis, and the inner wall of the inner tube of the lift rod is provided with first grooves that are evenly distributed along its axis; A lift rod inner tube plug is provided at the lower end of the lift rod inner tube, and a second protrusion is provided on the side wall of the lift rod inner tube plug, the second protrusion being matched with the first groove; 3. The motor-integrated pneumatic rod according to claim 2, wherein a second guide sleeve is installed between the outer tube of the lift rod and the inner tube of the lift rod, and a second groove is installed on the inner wall of the second guide sleeve, the second groove being adapted to the second protrusion.

4. The motor-integrated pneumatic rod according to claim 3, characterized in that a threaded pipe rear plug is fixedly attached to the end of the threaded pipe, and the threaded pipe rear plug is fixed and connected to the inner pipe plug of the lift rod.

5. The motor-integrated pneumatic rod according to claim 4, characterized in that one end of the inner pipe plug of the lift rod is provided with a rear plug connecting rod which is connected to the threaded pipe rear plug, and the other end of the inner pipe plug of the lift rod is provided with a positioning rod, and a seal plate is fixed and installed at the end of the sleeve pipe, and the positioning rod passes through the seal plate and is connected to the seal plate via a circlip.

6. The motor-integrated pneumatic rod according to claim 5, wherein the driving unit comprises a motor, a gearbox and a controller, and the output end of the motor drives the screw tube to rotate via the gearbox.

7. The motor-integrated pneumatic rod according to claim 6, characterized in that the output end of the gearbox is connected to the piston rod through a coupling, and a vibration damping pad is installed in the area of ​​the piston rod located between the coupling and the threaded tube.

8. The motor-integrated pneumatic rod according to any one of claims 1 to 7, characterized in that the seal guide part comprises a spacer sleeve, an oil seal, and a rear top sleeve, the oil seal being located between the spacer sleeve and the rear top sleeve, and the rear top sleeve being fixed and connected to an end of the threaded pipe.

9. 9. The motor-integrated pneumatic rod according to claim 8, wherein the connecting end of the sleeve pipe and the connecting end of the outer pipe of the lift rod are both in the shape of a circular truncated disk.

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