Electric lifting and walking auxiliary trundle

Abstract

The utility model discloses an electric lifting and walking auxiliary caster, which relates to the field of casters and comprises an electric caster, a caster support, a support frame and an electric actuator. A motor and a speed control system are arranged in the electric trundle, the electric trundle is installed at one end of the trundle support, the other end of the trundle support is movably connected with the supporting frame through an electric actuator, and the supporting frame is hinged to the middle of the trundle support through a first pin shaft. A buffering device is installed between the trundle support and the supporting frame, and the trundle support rotates around the first pin shaft to compress the buffering device, so that the buffering device has counter-acting force on the trundle support. Through a crank edge connecting rod mechanism composed of the electric trundles, the trundle supports, the supporting frame and the electric actuator, the functions of rising, falling and fast and slow starting and stopping walking of the trundles are achieved in an electric drive mode, the electric wheelchair can stably avoid pits and easily climb a slope, and one-key control of medical staff is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of casters, in particular to an electric lifting and walking auxiliary caster. Background Art

[0002] Common caster types can be divided into universal casters, fixed casters, universal casters with brakes and central control casters, etc. They are widely used in almost any industry. In the past, mechanical casters used human mechanical devices to control the lifting and lowering of the casters and the speed of starting and stopping. It is difficult to control and walk when the ground is rubbed, the road surface is uneven, or there is a slope. With the advancement of medical technology, in order to solve the above problems, the existing bed body has made special requirements for medical casters for medical mobile devices such as operating tables, hospital beds, wheelchairs, operating carts, etc., in order to meet the convenience of movement, precise control, stability, and intelligent control of mobile devices. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides an electric lifting and walking auxiliary caster to solve the problems existing in the above-mentioned background technology.

[0004] The utility model provides the following technical solutions: an electric lifting and walking auxiliary caster, comprising: an electric caster, a caster bracket, a support frame, and an electric actuator;

[0005] The electric caster is provided with a motor and a speed control system, and the electric caster is mounted at one end of the caster bracket, and the other end of the caster bracket is movably connected to the support frame through an electric actuator, and the support frame is hinged to the middle part of the caster bracket through a first pin shaft, and a buffer device is installed between the caster bracket and the support frame, and the caster bracket rotates around the first pin shaft to compress the buffer device, so that the buffer device has a reaction force on the caster bracket.

[0006] Preferably, the buffer device comprises a gas spring, and the gas spring comprises a first cylinder filled with high-pressure gas and a first piston rod with one end movably inserted in the first cylinder.

[0007] Preferably, a first joint is installed at one end of the first cylinder, and the first joint is hinged to the support frame through a second pin shaft. A second joint is installed at the other end of the first piston rod, and the second joint is hinged to the caster bracket close to the electric caster through a third pin shaft.

[0008] Preferably, the electric actuator comprises an electric push rod motor, and the electric push rod motor comprises a gearbox system for changing the direction of the motor, a second cylinder, and a second piston rod with one end connected by a screw rod.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model uses a crank-connecting rod mechanism consisting of an electric caster, a caster bracket, a support frame, and an electric actuator to realize the functions of raising, lowering, starting and stopping the caster at high and low speeds through electric drive. It can stably avoid pits and climb slopes easily, and is convenient for medical staff to control with one button. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0012] Figure 2 It is a schematic diagram of the structure of the buffer device of the present invention;

[0013] Figure 3 It is a schematic diagram of the structure of the electric actuator of the present invention;

[0014] Figure 4 It is a schematic diagram of the lifting structure of the electric caster of the present invention;

[0015] Figure 5 It is a schematic diagram of the electric caster falling structure of the present invention.

[0016] The accompanying drawings are marked as follows: 1. electric caster; 2. caster bracket; 3. support frame; 4. electric actuator; 5. first pin shaft; 6. gas spring; 601. first cylinder; 602. first piston rod; 603. first joint; 604. second joint; 7. second pin shaft; 8. third pin shaft; 9. electric push rod motor; 901. second cylinder; 902. second piston rod; 10. fourth pin shaft. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0018] The utility model provides an electric lifting and walking auxiliary caster, such as Figure 1-4 As shown, an electric lifting and walking auxiliary caster includes: an electric caster 1, a caster bracket 2, a support frame 3, and an electric actuator 4.

[0019] See also Figure 1The electric caster 1 is provided with a motor and a speed control system. The electric caster 1 is installed at one end of the caster bracket 2. The other end of the caster bracket 2 is movably connected to the support frame 3 through the electric actuator 4, and the support frame 3 is hinged to the middle part of the caster bracket 2 through the first pin shaft 5. A buffer device is installed between the caster bracket 2 and the support frame 3. The caster bracket 2 rotates around the first pin shaft 5 to compress the buffer device, so that the buffer device has a reaction force on the caster bracket 2. The electric caster 1 can receive external signals to control its own start, stop and speed adjustment.

[0020] See also Figure 2 As a further improvement of the present invention, the buffer device includes a gas spring 6, which includes a first cylinder 601 filled with high-pressure gas and a first piston rod 602 with one end movably inserted in the first cylinder 601. Under the elastic force of the gas spring 6, the caster bracket 2 can have a good buffering effect when lifting or lowering the electric caster 1, ensuring a smooth lifting or lowering process of the electric caster 1, reducing noise, and protecting the ground.

[0021] See also Figure 2 As a further improvement of the present invention, a first joint 603 is installed at one end of the first cylinder 601, and the first joint 603 is hinged to the support frame 3 through the second pin shaft 7. A second joint 604 is installed at the other end of the first piston rod 602, and the second joint 604 is hinged to the caster bracket 2 near the caster through the third pin shaft 8.

[0022] See also Figure 3~Figure 5 As a further improvement of the present invention, the electric actuator 4 includes an electric push rod motor 9, which includes a gearbox system and a second cylinder 901 that can change the direction of the motor, and a second piston rod 902 connected at one end by a screw rod. The second cylinder 901 at one end of the electric push rod motor 9 is hinged to the support frame 3 through a fourth pin shaft 10, and the second piston rod 902 at the other end of the electric push rod motor 9 is hinged to the caster bracket 2 through a fifth pin shaft 11. The electric push rod motor 9 can receive external signals to control the extension and shortening of its own second piston rod 902. When the second piston rod 902 of the electric push rod motor 9 is extended, the entire caster system behaves as the electric caster 1 rising (such as Figure 4 As shown in FIG. 1 , when the second piston rod 902 of the electric push rod motor 9 is shortened, the entire caster system is characterized by the electric caster 1 falling (as shown in FIG. 1 ). Figure 5 shown).

[0023] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0024] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. An electric lifting and walking auxiliary caster, characterized in that: include: Electric caster (1), caster bracket (2), support frame (3), electric actuator (4); The electric caster (1) is provided with a motor and a speed control system. The electric caster (1) is mounted on one end of the caster bracket (2). The other end of the caster bracket (2) is movably connected to the support frame (3) via an electric actuator (4). The support frame (3) is hinged to the middle of the caster bracket (2) via a first pin shaft (5). A buffer device is installed between the caster bracket (2) and the support frame (3). The caster bracket (2) rotates around the first pin shaft (5) to compress the buffer device, so that the buffer device has a reaction force on the caster bracket (2).

2. The electric lifting and walking auxiliary caster according to claim 1, characterized in that: The buffer device comprises a gas spring (6), wherein the gas spring (6) comprises a first cylinder (601) filled with high-pressure gas and a first piston rod (602) with one end movably inserted into the first cylinder (601).

3. The electric lifting and walking auxiliary caster according to claim 2, characterized in that: A first joint (603) is installed at one end of the first cylinder (601), and the first joint (603) is hinged to the support frame (3) via a second pin shaft (7). A second joint (604) is installed at the other end of the first piston rod (602), and the second joint (604) is hinged to the caster bracket (2) near the electric caster via a third pin shaft (8).

4. The electric lifting and walking auxiliary caster according to claim 1, characterized in that: The electric actuator (4) comprises an electric push rod motor (9), wherein the electric push rod motor (9) comprises a gearbox system for changing the direction of rotation of the motor, a second cylinder (901), and a second piston rod (902) with one end connected via a screw rod.

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