Electric carrier

Abstract

The utility model relates to the technical field of carriers, and discloses an electric carrier which is characterized in that a bearing frame support is hinged between a front wheel assembly and a rear wheel assembly, an operation assembly is rotatably connected with the front wheel assembly of a wheel carrier assembly, a bearing frame is arranged on the bearing frame support, and a battery bin is arranged on the front side of the bearing frame; an electric push rod is hinged between the battery bin and a front wheel assembly of the wheel carrier assembly, the operation assembly instructs the motor unit to drive a lead screw in the lead screw assembly to rotate, a telescopic sleeve does linear motion, and when the electric push rod is located at the initial position, the included angle alpha between the axis of the electric push rod and the axis of the bearing frame ranges from 66 degrees to 80 degrees. When the electric push rod is located at the stop position, the included angle beta between the axis of the electric push rod and the axis of the bearing frame ranges from 70 degrees to 85 degrees. Compared with a hydraulic oil cylinder, the energy efficiency of the carrier is higher when the carrier bears goods with the same weight on the bearing frame, the ascending speed of the bearing frame is obviously higher, and the electric push rod is low in operation cost and maintenance cost, energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of transport vehicles, in particular to an electric transport vehicle. Background Art

[0002] Electric transport trucks are a type of material handling equipment widely used in the fields of logistics and warehousing. They are widely used in factories, warehouses, distribution centers, supermarkets, airports, docks and other places. They are one of the indispensable tools in modern logistics systems.

[0003] At present, the lifting function of electric transport trucks is mainly completed by hydraulic cylinders, which are prone to hydraulic oil leakage. In places with high working environment requirements such as pharmaceutical workshops and electronic workshops, hydraulic oil leakage often contaminates goods and causes great economic losses.

[0004] At the same time, driving the hydraulic cylinder requires a hydraulic oil pump, which will also occupy the storage space of the electric transport truck, reducing the transportable space of the electric transport truck. At the same time, the hydraulic oil pump also has weight and will rise and fall with the electric transport truck and the bracket, which increases the power of the motor driving the hydraulic oil pump and increases the power consumption. The electric transport truck has a short working time and affects work efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to solve the problems mentioned in the above background technology and provide an electric transport vehicle.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The invention discloses an electric transport vehicle, comprising an operating assembly, a wheel frame assembly and a supporting frame, wherein the wheel frame assembly comprises a front wheel assembly, a rear wheel assembly and a supporting frame bracket, the supporting frame bracket is hinged between the front wheel assembly and the rear wheel assembly, the operating assembly is rotatably connected to the front wheel assembly of the wheel frame assembly, the supporting frame is arranged on the supporting frame bracket, a battery compartment is provided on the front side of the supporting frame, an electric push rod is hinged between the battery compartment and the front wheel assembly of the wheel frame assembly, the electric push rod comprises a motor unit, a telescopic sleeve and a screw rod assembly, the operating assembly instructs the motor unit to drive the screw rod in the screw rod assembly to rotate, so that the telescopic sleeve moves linearly, thereby realizing height adjustment of the supporting frame, when the electric push rod is in the initial position, the angle ɑ between the axis of the electric push rod and the axis of the supporting frame is 66° to 80°; when the electric push rod (15) is in the end position, the angle β between the axis of the electric push rod and the axis of the supporting frame is 70° to 85°.

[0008] Furthermore, the front wheel assembly includes a front wheel, a front wheel bracket and a front wheel cover, and one end of the electric push rod is hinged to the front wheel cover at a hinge point A, and the other end is hinged to the battery compartment.

[0009] Furthermore, the front wheel assembly includes a front wheel, a front wheel bracket and a front wheel cover. The front wheel bracket is connected to the object rack bracket through a first connecting rod. One end of the first connecting rod is hinged to the front wheel bracket at point B, and the other end is hinged to the object rack bracket.

[0010] Furthermore, when the electric push rod moves from the initial position to the final position, the first connecting rod rotates counterclockwise around the hinge point B between the first connecting rod and the front wheel bracket.

[0011] Furthermore, a rocker arm is provided above the front wheel bracket and a fixed bracket is provided at the upper rear portion. The rocker arm can rotate in a circumferential direction relative to the front wheel bracket. A second connecting rod is hinged between the fixed bracket and the battery compartment. One end of the fixed bracket is fixedly connected to the front wheel bracket, and the other end is hinged to the second connecting rod at a hinge point D.

[0012] Furthermore, when the electric push rod moves from the initial position to the final position, the second connecting rod rotates counterclockwise around the hinge point D between the second connecting rod and the fixed bracket.

[0013] Furthermore, the operating assembly includes an operating panel and an operating lever, and the operating lever is rotatably connected to the rocker arm and rotates in an up and down direction relative to the rocker arm.

[0014] Furthermore, the manual operation lever can control the front wheel to move forward and backward and turn left and right.

[0015] Furthermore, the rear wheel assembly includes a rear wheel frame and a rear wheel, one end of the rear wheel frame is hinged to the object support frame to form a hinge point C, and the rear wheel is hinged to the other end of the rear wheel frame.

[0016] Furthermore, when the electric push rod moves from the initial position to the final position, the rear wheel bracket rotates clockwise with the hinge point C as the center.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model uses an electric push rod as a driver. Compared with the use of a hydraulic cylinder, the electric push rod has high energy efficiency, reduces energy consumption, and has no risk of hydraulic oil leakage. It is energy-saving and environmentally friendly, and there is no maintenance cost such as a hydraulic oil pump and a control valve, thereby reducing operating costs.

[0019] 2. The initial angle between the axis of the electric push rod and the axis of the support rack is designed to be 66°~80°; the terminal angle between the axis of the electric push rod and the pallet of the transport truck is designed to be 70°~85°; this design makes it possible for the electric transport truck to significantly reduce the power of the motor when carrying the same weight of goods on the support rack, significantly increase the linear speed of the electric push rod, significantly increase the rising speed of the support rack, and keep the current value and noise of the motor within an acceptable range, thus saving energy and electricity, and further extending the use time after charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic structural diagram of the utility model in its initial position;

[0022] Figure 2 It is a partial enlarged view of point F of the present utility model;

[0023] Figure 3 This utility model Figure 1 A schematic diagram of the structure with some partial cross-sections;

[0024] Figure 4 It is a structural schematic diagram of the utility model when it is in the end position;

[0025] Figure 5 This utility model Figure 4 A schematic diagram of the structure with some partial cross-sections;

[0026] In the figure: 1-operation panel; 2-operation lever; 3-rocker arm; 4-fixing bracket; 5-front wheel cover; 6-front wheel; 7-front wheel bracket; 8-first connecting rod; 9-support rack bracket; 10-rear wheel rack; 11-rear wheel; 12-support rack; 13-battery compartment; 14-second connecting rod; 15-electric push rod. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0028] The technical terms or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words include direct connection and indirect connection. "Up", "down", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] like Figures 1 to 5The electric transport vehicle shown includes an operating assembly, a wheel frame assembly, and a support frame 12. The operating assembly is directly or indirectly connected to the front wheel assembly of the wheel frame assembly. The support frame 12 is arranged on the support frame bracket 9 of the wheel frame assembly. A battery compartment 13 is provided on the side of the support frame 12 close to the front wheel assembly. An electric push rod 15 is installed between the battery compartment 13 and the front wheel assembly of the wheel frame assembly. Specifically, one end of the electric push rod 15 is hinged to the front wheel assembly of the wheel frame assembly to form a hinge point A, and the other end is hinged to the top or upper middle part of the battery compartment 13. The electric push rod 15 includes a motor unit, a telescopic sleeve, and a screw assembly. The operation assembly can instruct the motor unit to drive the screw in the screw assembly to rotate, thereby causing the telescopic sleeve to move linearly. The electric push rod 12 uses the hinge point A as a fulcrum and changes in length and angle between the battery compartment 13 and the wheel frame assembly, thereby achieving a height change of the support frame 12.

[0030] The wheel frame assembly includes a front wheel assembly, a rear wheel assembly and a storage rack bracket 9. The front wheel assembly includes a front wheel 6, a front wheel bracket 7 and a front wheel cover 5. A first connecting rod 8 is hinged between the front wheel bracket 7 and the storage rack bracket 9. One end of the first connecting rod 8 is hinged to the front wheel bracket 7 at point B, and the other end is hinged to the storage rack bracket 9. A rocker arm 3 is provided above the front wheel bracket 7, and the rocker arm 3 can rotate in a circumferential direction relative to the front wheel bracket 7; the operating assembly includes an operating panel 1 and an operating lever 2. The operating panel 1 is provided with a switch for controlling the rise or fall of the storage rack 12, and a switch for controlling the forward, backward and steering of the electric transport truck; the operating lever 2 is rotatably connected to the rocker arm 3 and rotates up and down relative to the rocker arm 3, so that manual operation of the operating lever 2 can also control the front wheel 6 to move forward and backward and turn left and right. A fixed bracket 4 is provided above and behind the front wheel bracket 7. A second connecting rod 14 is hinged between the fixed bracket 4 and the battery compartment 13. One end of the fixed bracket 4 is fixedly connected to the front wheel bracket 7, and the other end is hinged to the second connecting rod 14 at a hinge point D.

[0031] The rear wheel assembly includes a rear wheel frame 10 and a rear wheel 11. One end of the rear wheel frame 10 is hinged to the object support frame 9 to form a hinge point C, and the other end is rotatably connected to the rear wheel 11.

[0032] The battery compartment 13 is used to store the power supply device and is located at the front side of the object support rack 12. The axis of the electric push rod 15 forms an angle with the axis of the object support rack 12. Figure 1 、 Figure 3 As shown, when the electric push rod 15 is in the initial position, that is, the electric push rod 15 is at its minimum length, the object support rack 12 is at its lowest point, and the angle between the axis of the electric push rod 15 and the axis of the object support rack 12 is ɑ, which is 66° to 80°; Figures 4-5 As shown, when the electric push rod 15 is at the end position, that is, the electric push rod 15 is at its maximum length, the object support rack 12 is at its highest point, and the angle between the axis of the electric push rod 15 and the axis of the object support rack 12 is β, which is 70°~85°.

[0033] Working principle:

[0034] In the initial state, the electric push rod 15 is in the initial position, that is, the angle ɑ between the axis of the electric push rod 15 and the axis of the support frame 12 is 66° to 80°;

[0035] The process of controlling the lifting of the object rack 12 is as follows: the electric push rod 15 extends and rotates counterclockwise with the hinge point A as the center. During the extension of the electric push rod 15, the battery compartment 13 and the front part of the object rack bracket 9 rise. During the rising process of the battery compartment 13, the first connecting rod 8 is driven to rotate counterclockwise around the hinge point B between it and the front wheel bracket 7, and the second connecting rod 14 is driven to rotate counterclockwise around the hinge point D between it and the fixed bracket 4. During the counterclockwise rotation of the first connecting rod 8 and the second connecting rod 14, the rear wheel bracket 10 rotates clockwise with the hinge point C as the center, and the rear part of the object rack 12 is raised; Figures 4-5 As shown, when the electric push rod 15 reaches the end position, the height of the object support rack 12 rises to the highest. At this position, the angle β between the axis of the electric push rod 15 and the axis of the object support rack 12 is 70° to 85°.

[0036] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric transport vehicle, comprising an operating assembly, a wheel frame assembly and a material support frame (12), wherein the wheel frame assembly comprises a front wheel assembly, a rear wheel assembly and a material support frame bracket (9), wherein the material support frame bracket (9) is hinged between the front wheel assembly and the rear wheel assembly, wherein the operating assembly is rotatably connected to the front wheel assembly of the wheel frame assembly, the material support frame (12) is arranged on the material support frame bracket (9), and a battery compartment (13) is provided on the front side of the material support frame (12), characterized in that: An electric push rod (15) is hinged between the battery compartment (13) and the front wheel assembly of the wheel frame assembly. The electric push rod (15) includes a motor unit, a telescopic sleeve and a screw assembly. The operating assembly instructs the motor unit to drive the screw in the screw assembly to rotate, so that the telescopic sleeve moves linearly, thereby achieving height adjustment of the object support rack (12). When the electric push rod (15) is in the initial position, the angle ɑ between the axis of the electric push rod (15) and the axis of the object support rack (12) is 66° to 80°; when the electric push rod (15) is in the terminal position, the angle β between the axis of the electric push rod (15) and the axis of the object support rack (12) is 70° to 85°.

2. The electric transport vehicle according to claim 1, characterized in that: One end of the electric push rod (15) is hinged to the front wheel cover (5) in the front wheel assembly at a hinge point A, and the other end is hinged to the battery compartment (13).

3. The electric transport vehicle according to claim 1, characterized in that: The front wheel assembly comprises a front wheel (6), a front wheel bracket (7) and a front wheel cover (5); the front wheel bracket (7) is connected to the object rack bracket (9) via a first connecting rod (8); one end of the first connecting rod (8) is hinged to the front wheel bracket (7) at point B, and the other end is hinged to the object rack bracket (9).

4. The electric transport vehicle according to claim 3, characterized in that: During the operation of the electric push rod (15) from the initial position to the final position, the first connecting rod (8) rotates counterclockwise around the hinge point B between the first connecting rod and the front wheel bracket (7).

5. The electric transport vehicle according to any one of claims 3 to 4, characterized in that: A rocker arm (3) is provided above the front wheel bracket (7), and a fixed bracket (4) is provided at the upper rear portion. The rocker arm (3) can rotate in a circumferential direction relative to the front wheel bracket (7). A second connecting rod (14) is hinged between the fixed bracket (4) and the battery compartment (13). One end of the fixed bracket (4) is fixedly connected to the front wheel bracket (7), and the other end is hinged to the second connecting rod (14) at a hinge point D.

6. The electric transport vehicle according to claim 5, characterized in that: When the electric push rod (15) moves from the initial position to the final position, the second connecting rod (14) rotates counterclockwise around the hinge point D between the second connecting rod and the fixed bracket (4).

7. The electric transport vehicle according to claim 5, characterized in that: The operating assembly comprises an operating panel (1) and an operating lever (2); the operating lever (2) is rotatably connected to the rocker arm (3) and rotates in an up-down direction relative to the rocker arm (3).

8. The electric transport vehicle according to claim 7, characterized in that: The operating lever (2) controls the front wheel (6) to move forward and backward and to turn left and right.

9. The electric transport vehicle according to claim 1, characterized in that: The rear wheel assembly comprises a rear wheel frame (10) and a rear wheel (11); one end of the rear wheel frame (10) is hinged to the object support frame (9) to form a hinge point C; the other end of the rear wheel frame (10) is hinged to the rear wheel (11).

10. The electric transport vehicle according to claim 9, characterized in that: When the electric push rod (15) moves from the initial position to the final position, the rear wheel frame (10) rotates clockwise with the hinge point C as the center of the circle.

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