Lifting mechanism for AGV

Abstract

The lifting mechanism for the AGV comprises a base, fixing bases are installed at the two ends of one side of the top of the base, sliding bases are installed at the two ends of the other side of the top of the base in a sliding mode, installation grooves are formed in the bottoms of the sliding bases, and spring shock absorbers are installed in the middles of the inner top faces of the installation grooves. Rollers are rotatably mounted at the bottoms of the spring shock absorbers through fixed shafts, and braking vanes are hinged to the two sides of the bottom ends of the spring shock absorbers. According to the assembly installed in the installation groove, after a control terminal obtains starting and stopping signals of a motor used for power transmission in the ball screw, the stepping motor is controlled to rotate, the braking vane is pulled up, the idler wheel can move along with deformation of the shear fork type lifting mechanism, and when lifting is stopped, the friction wheel does not rotate any more, so that the friction wheel is prevented from rotating. And at the moment, the rotating drum rotates under the elastic force of the torsional spring, so that the braking vane is in contact with the rolling wheel to brake the rolling wheel, the sliding seat is not prone to sliding, and the effect of locking the lifting height is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of AGV trolleys, in particular to a lifting mechanism for an AGV trolley. Background Art

[0002] AGV is an automated material handling robot with the advantages of high automation integration, wide application range, strong reliability, automatic driving, quick installation and easy use. It is widely used in automated production, logistics and warehousing material transportation places such as the tobacco industry, automobile manufacturing industry, engineering machinery industry, mechanical processing industry, agriculture, airports, docks, etc.

[0003] During the AGV assembly process, the lifting device is responsible for lifting the power assembly to a suitable height. After completing the installation task, it returns to the lowest position to wait for the material to be loaded. It is required that during use, the top of the lifting device always remains horizontal, and the structure is simple, the weight is light, and the lifting height is large. After returning, the lifting device occupies less space and has better performance.

[0004] In order to meet the above requirements, ball screws are often used as the main transmission method, and are used in conjunction with a scissor-type lifting mechanism to perform lifting actions. Since ball screws have the advantages of high positioning accuracy, low noise during operation, and long service life, in order to ensure the transmission performance during the lifting process, AGV lifting mechanisms generally use ball screws for transmission.

[0005] However, the transmission method based on ball screw is not easy to achieve self-locking, and an additional braking device needs to be installed. However, since the components installed on the AGV cart are relatively compact, it is not easy to install additional braking devices, which results in restrictions on the lifting mechanism based on ball screw. Utility Model Content

[0006] The technical problem to be solved by the utility model is that the existing AGV trolley is limited by space, and when a ball screw is used as a transmission method and a scissor-type lifting mechanism is used to perform a lifting action, it is inconvenient to install a braking device.

[0007] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a lifting mechanism for an AGV trolley, comprising a base, fixed seats are installed at both ends of one side of the top of the base, and slide seats are slidably installed at both ends of the other side of the top of the base, a mounting groove is opened at the bottom of the slide seat, a spring shock absorber is installed at the middle position of the top surface in the mounting groove, a roller is rotatably installed at the bottom of the spring shock absorber, brake plates are hinged on both sides of the bottom end of the spring shock absorber, a stepper motor is installed on the side wall of the mounting groove, a first friction wheel is installed at the output end of the stepper motor, two mounting shafts are symmetrically installed on the side wall of the mounting groove, and the sides of the two mounting shafts are both sleeved with rotating drums, a second friction wheel is rotatably installed at one end of the rotating drum, and a torsion spring is sleeved at one end of the mounting shaft away from the second friction wheel, a scissor-type lifting mechanism is hinged between the fixed seat and the side of the slide seat, a screw lifting mechanism is installed on the top of the base, and a control terminal is installed on the inner wall of the mounting groove.

[0008] The utility model is further configured that the end of the torsion spring is connected to the side of the rotating drum, and the rotation direction of the torsion spring is opposite to the rotation direction of the second friction wheel.

[0009] The utility model is further configured such that the side surfaces of the first friction wheel and the second friction wheel are provided with friction layers in contact with each other.

[0010] The utility model is further configured that a rope is wound around the side of the rotating drum, and the rotating drum is connected to a brake plate located on the same side through the rope arranged on the side.

[0011] The utility model is further configured that a slide groove matched with the roller is opened on the top of the base.

[0012] The utility model is further configured that two sliding blocks are symmetrically installed on the side of the rotating drum close to one end of the second friction wheel, and the side of the second friction wheel is provided with a sliding groove matching the sliding block arranged on the rotating drum.

[0013] The utility model is further configured that the control terminal includes a chassis and a control mainboard installed in the chassis, and the control mainboard is electrically connected to the stepper motor.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model uses a component installed in a mounting groove. When the control terminal obtains an on / off signal of a motor used for power transmission in a ball screw, it controls the rotation of a stepping motor to pull up a brake plate, so that the roller can move with the deformation of the scissor-type lifting mechanism. When the lifting stops, the friction wheel stops rotating. At this time, the rotating drum rotates under the elastic force of the torsion spring, so that the brake plate contacts the roller and brakes the roller, so that the slide seat is not easy to slide, thereby achieving the effect of locking the lifting height. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal component structure of the installation slot of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the rotating drum and the second friction wheel of the utility model.

[0019] In the figure: 1. base; 2. fixed seat; 3. sliding seat; 4. mounting groove; 5. spring shock absorber; 6. roller; 7. brake plate; 8. stepping motor; 9. first friction wheel; 10. mounting shaft; 11. rotating drum; 12. second friction wheel; 13. torsion spring; 14. scissor-type lifting mechanism; 15. screw lifting mechanism; 16. control terminal. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figures 1 to 3 A lifting mechanism for an AGV trolley includes a base 1, a fixed base 2 is installed at both ends of one side of the top of the base 1, a slide seat 3 is slidably installed at both ends of the other side of the top of the base 1, a mounting groove 4 is opened at the bottom of the slide seat 3, a spring shock absorber 5 is installed at the middle position of the top surface of the mounting groove 4, a roller 6 is installed at the bottom of the spring shock absorber 5 for fixed axis rotation, brake plates 7 are hinged on both sides of the bottom end of the spring shock absorber 5, a stepper motor 8 is installed on the side wall of the mounting groove 4, a first friction wheel 9 is installed at the output end of the stepper motor 8, two mounting shafts 10 are symmetrically installed on the side wall of the mounting groove 4, and the sides of the two mounting shafts 10 A rotating drum 11 is sleeved on each of the two frames, and a second friction wheel 12 is rotatably mounted on one end of the rotating drum 11. A torsion spring 13 is sleeved on the end of the mounting shaft 10 away from the second friction wheel 12. A scissor-type lifting mechanism 14 is hingedly connected to the side of the fixed seat 2 and the sliding seat 3. A screw lifting mechanism 15 is installed on the top of the base 1, and a control terminal 16 is installed on the inner wall of the mounting groove 4. In the prior art, when a ball screw is used as the power output, a motor is used to realize the rotation of the screw. Therefore, when the motor in the screw lifting mechanism 15 is working, the control terminal 16 can control the opening and closing of the stepping motor 8 after obtaining the opening and closing signal of the motor.

[0022] like Figure 2As shown, the end of the torsion spring 13 is connected to the side of the rotating drum 11, and the rotation direction of the torsion spring 13 is opposite to the rotation direction of the second friction wheel 12. Based on the above content, when the rotating drum 11 is rotated, the torsion spring 13 can be tightened. After the friction wheel stops rotating, the rotating drum 11 is rotated with the help of the elastic force of the torsion spring 13, so that the brake plate 7 away from the roller 6 is in contact with the roller 6 again, so as to achieve braking of the roller 6.

[0023] like Figure 2 As shown, the sides of the first friction wheel 9 and the second friction wheel 12 are provided with friction layers in contact with each other. When the output end of the stepper motor 8 rotates, the second friction wheel 12 can be driven to rotate by the first friction wheel 9.

[0024] like Figure 2 As shown, a rope is wound around the side of the rotating drum 11, and the rotating drum 11 is connected to the brake plate 7 on the same side through the rope arranged on the side, so that the rotating drum 11 can control the retraction and extension of the brake plate 7 on the same side through the rope when rotating.

[0025] A slide groove matched with the roller 6 is provided on the top of the base 1 , and the slide groove provides space for the roller 6 to slide.

[0026] like Figure 3 As shown, two sliders are symmetrically installed on the side of the rotating drum 11 near one end of the second friction wheel 12, and a slide groove matching the slider arranged on the rotating drum 11 is opened on the side of the second friction wheel 12. Through the cooperation between the slider and the slide groove, the rotating drum 11 can be driven by the second friction wheel 12 to rotate and can also be rotated by the elastic force of the torsion spring 13.

[0027] The control terminal 16 includes a chassis and a control mainboard installed in the chassis, and the control mainboard is electrically connected to the stepper motor 8 , so that the rotation of the stepper motor 8 can be controlled by the internal components of the control terminal 16 .

[0028] When the utility model is in use, the stepper motor 8 is controlled to rotate by the control mainboard in the control terminal 16. When the lifting function needs to be realized, the stepper motor 8 drives the first friction wheel 9 to rotate by the rotation of the output end, and drives the second friction wheel 12 to rotate by the friction force between the first friction wheel 9 and the second friction wheel 12. As the second friction wheel 12 rotates, when the sliding block installed on the rotating drum 11 contacts the side of the sliding groove on the second friction wheel 12, the rotating drum 11 is driven by the second friction wheel 12 to rotate, and the rope is wound up, thereby pulling up the brake plate 7, so that the roller 6 can move with the deformation of the scissor-type lifting mechanism 14. When the lifting stops, the friction wheel no longer rotates. At this time, the rotating drum 11 rotates under the elastic force of the torsion spring 13, so that the brake plate 7 contacts with the roller 6, and brakes the roller 6, so that the slide seat 3 is not easy to slide, thereby achieving the effect of locking the lifting height.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lifting mechanism for an AGV, comprising a base (1), characterized in that: A fixed seat (2) is installed at both ends of one side of the top of the base (1), and a slide seat (3) is slidably installed at both ends of the other side of the top of the base (1). A mounting groove (4) is provided at the bottom of the slide seat (3). A spring shock absorber (5) is installed at the middle position of the top surface of the mounting groove (4). A roller (6) is installed at the bottom of the spring shock absorber (5) for rotation on a fixed axis. Brake plates (7) are hinged on both sides of the bottom end of the spring shock absorber (5). A stepper motor (8) is installed on the side wall of the mounting groove (4). A first friction wheel ( 9), two installation shafts (10) are symmetrically installed on the side wall of the installation groove (4), and the sides of the two installation shafts (10) are sleeved with a rotating cylinder (11), one end of the rotating cylinder (11) is rotatably installed with a second friction wheel (12), and the end of the installation shaft (10) away from the second friction wheel (12) is sleeved with a torsion spring (13), the side of the fixed seat (2) and the sliding seat (3) are hinged with a scissor-type lifting mechanism (14), the top of the base (1) is installed with a screw lifting mechanism (15), and the inner wall of the installation groove (4) is installed with a control terminal (16).

2. The lifting mechanism for an AGV according to claim 1, characterized in that: The end of the torsion spring (13) is connected to the side surface of the rotating drum (11), and the rotation direction of the torsion spring (13) is opposite to the rotation direction of the second friction wheel (12).

3. The lifting mechanism for an AGV according to claim 1, characterized in that: The side surfaces of the first friction wheel (9) and the second friction wheel (12) are provided with friction layers in contact with each other.

4. The lifting mechanism for an AGV according to claim 1, characterized in that: A rope is wound around the side of the rotating drum (11), and the rotating drum (11) is connected to a brake plate (7) located on the same side via the rope arranged on the side.

5. The lifting mechanism for an AGV according to claim 1, characterized in that: The top of the base (1) is provided with a slide groove matched with the roller (6).

6. The lifting mechanism for an AGV according to claim 1, characterized in that: Two sliding blocks are symmetrically mounted on the side surface of the rotating drum (11) close to one end of the second friction wheel (12), and a sliding groove matching the sliding block arranged on the rotating drum (11) is provided on the side surface of the second friction wheel (12).

7. The lifting mechanism for an AGV according to claim 1, characterized in that: The control terminal (16) comprises a chassis and a control mainboard installed in the chassis, and the control mainboard is electrically connected to the stepping motor (8).

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