An electrically powered trolley

Abstract

The application discloses an electric trolley, which comprises a chassis, an anti-collision unit and a brake disc arranged on a rear wheel shaft; the anti-collision unit is arranged on the bottom side of the chassis and is configured to lock the brake disc when the anti-collision unit contacts with a collision object and continuously approaches, so as to realize the anti-collision of the electric trolley. When the electric trolley is accidentally started due to improper operation in a construction elevator, the trolley collides with the wall surface of the elevator at a high speed, at this time, the collision rod is in contact with the wall surface of the elevator first and triggers the device brake system, so that the trolley is slowed down and stopped, and a certain buffering effect is achieved. At the same time, a part of kinetic energy is converted into potential energy of the device, so that the impact force on the wall surface of the elevator is greatly reduced, and the carrying operation of the electric trolley in the construction elevator is effectively ensured.

Description

Technical Field

[0001] This invention belongs to the field of electric handcart technology, and particularly relates to an electric handcart. Background Technology

[0002] Electric machinery, due to its energy efficiency, high performance, and environmental friendliness, is increasingly widely used in the engineering construction field, with electric handcarts being one example. Electric handcarts have changed the traditional manual transport mode, significantly improving material transportation efficiency. While they were originally intended for widespread use in construction, recent years have seen frequent accidents involving electric handcarts, leading to bans on their use at construction sites in many parts of the country. Accidents involving handcarts colliding with elevator doors due to improper operation are common, necessitating optimization and improvement of electric handcarts to prevent such accidents. Summary of the Invention

[0003] The purpose of this invention is to overcome the problems of the prior art by disclosing an electric handcart. Through the structural design of the electric handcart of this invention, automatic anti-collision of the electric handcart is achieved.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] An electric handcart, the electric handcart including a chassis, a collision protection unit and a brake disc mounted on the rear wheel axle;

[0006] The anti-collision unit is located on the bottom side of the chassis and is configured to lock the brake disc when the anti-collision unit comes into contact with and continues to approach a collision object, thereby achieving anti-collision of the electric handcart.

[0007] According to a preferred embodiment, the anti-collision unit includes: a collision rod, a rotating shaft, a crank, a connecting rod, a brake base, a slider, a rocker arm, and a driven rod;

[0008] One end of the collision rod is fixedly connected to the rotating shaft and can drive the rotating shaft to rotate;

[0009] The rotating shaft is fixed to the chassis by a fixing component;

[0010] One end of the crank is connected to the shaft, and the other end is hinged to one end of the connecting rod.

[0011] The other end of the connecting rod is hinged to the slider located in the brake base and can drive the slider to reciprocate.

[0012] The slider is also hinged to one end of the rocker arm, the other end of the rocker arm is hinged to the driven rod, and the other end of the driven rod is hinged to the brake base;

[0013] Furthermore, the driven rod is provided with a brake pad in the direction close to the brake disc. The reciprocating motion of the slider drives the brake pad to contact or move away from the brake disc, thereby locking or unlocking the brake disc.

[0014] According to a preferred embodiment, the anti-collision unit has two rocker arms and two driven rods, which are symmetrically arranged on both sides of the brake disc. The brake disc is clamped and locked by the brake pads on the driven rods.

[0015] According to a preferred embodiment, the brake base is provided with a slider stroke rod, the slider is sleeved on the slider stroke rod, and reciprocates on the slider stroke rod.

[0016] According to a preferred embodiment, a return spring is also sleeved on the slider stroke rod. The return spring is located near the end of the vehicle body and is used to push the slider to return to the front end of the vehicle body.

[0017] According to a preferred embodiment, the anti-collision unit has two cranks and two connecting rods, which are symmetrically arranged on both sides of the brake base.

[0018] According to a preferred embodiment, a torsion spring is provided between the rotating shaft and the chassis bottom fixing member; when the collision rod drives the rotating shaft to rotate, the torsion spring torsion to obtain elastic potential energy, thereby making the rotating shaft have a restoring tendency.

[0019] According to a preferred embodiment, the electric handcart further includes an electric drive unit, which is disposed on the lower side of the chassis and connected to the rear wheel axle via a transmission structure, thereby driving the rear wheels at both ends of the rear wheel axle.

[0020] According to a preferred embodiment, the front end of the chassis of the electric handcart is provided with two front wheels, and the front wheels are omnidirectional wheels.

[0021] According to a preferred embodiment, the top side of the end of the chassis is further provided with an armrest bracket, and an armrest is installed at the bottom end of the armrest bracket.

[0022] The aforementioned main solution of the present invention and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed by the present invention. Those skilled in the art, after understanding the solution of the present invention, will realize that there are many combinations based on existing technology and common knowledge, all of which are technical solutions to be protected by the present invention, and will not be exhaustively listed here.

[0023] The beneficial effects of this invention are:

[0024] When the electric handcart of this invention accidentally starts due to improper operation in a construction elevator, it impacts the elevator wall at a high speed. At this point, the collision rod first contacts the elevator wall and triggers the braking system, causing the handcart to decelerate and stop, thus providing a certain degree of cushioning. Simultaneously, some of the kinetic energy is converted into the potential energy of the device, greatly reducing the impact force on the elevator wall and effectively ensuring the safe operation of the electric vehicle within the construction elevator. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the electric handcart of the present invention;

[0026] Figure 2 This is a side view of the electric handcart structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the bottom structure of the electric handcart of the present invention;

[0028] Figure 4 This is a structural diagram of the electric handcart brake base of the present invention;

[0029] Figure 5 This is a schematic diagram of the anti-collision transmission system for the electric handcart of the present invention;

[0030] Figure 6 This is a schematic diagram illustrating the anti-collision braking principle of the electric handcart of the present invention;

[0031] Figure 7 This is a schematic diagram illustrating the braking process of the electric handcart of the present invention;

[0032] Figure 8 This is a schematic diagram illustrating the principle of the electric handcart reset process of the present invention;

[0033] Among them, 1-collision rod, 2-chassis, 3-shaft, 4-crank, 5-connecting rod, 6-brake base, 601-reset spring, 602-brake base frame, 603-slider stroke rod, 7-slider, 8-rocker, 9-driven rod, 901-brake pad, 10-brake disc, 11-torsion spring, 12-front wheel, 13-rear wheel, 14-armrest bracket, 15-armrest, 16-rear wheel axle. Detailed Implementation

[0034] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Furthermore, it should be noted that, unless otherwise specified, the structures, connections, positions, power sources, etc. involved in this invention are all things that a person skilled in the art can know without creative effort based on the prior art.

[0040] Example 1:

[0041] refer to Figures 1 to 6 As shown in the figure, an electric handcart is provided, which includes a chassis 2, an anti-collision unit, and a brake disc 10 mounted on the axle of the rear wheel 13. The anti-collision unit is located on the underside of the chassis 2 and is configured to lock the brake disc 10 as the anti-collision unit comes into contact with and continues to approach a collision object, thereby achieving anti-collision protection for the electric handcart.

[0042] Preferably, the electric handcart further includes an electric drive unit, which is located on the lower side of the chassis 2 and connected to the rear wheel 13 axle via a transmission structure, thereby driving the rear wheels 13 at both ends of the rear wheel 13 axle.

[0043] Preferably, the chassis 2 of the electric handcart is provided with two front wheels 12 at the front end, and the front wheels 12 are swivel wheels to assist in the steering of the electric handcart.

[0044] Preferably, the top side of the end of the chassis 2 is further provided with a handrail 15 bracket 14, and a handrail 15 is installed at the bottom end of the handrail 15 bracket 14. This facilitates the operator's pushing and control operations.

[0045] Preferably, the anti-collision unit includes: a collision rod 1, a rotating shaft 3, a crank 4, a connecting rod 5, a brake base 6, a slider 7, a rocker arm 8, and a driven rod 9.

[0046] One end of the collision rod 1 is fixedly connected to the rotating shaft 3 and can drive the rotating shaft 3 to rotate. The other end of the collision rod 1 serves as the contact end, meaning that when the contact end of the collision rod 1 touches an obstacle, it will drive the rotating shaft 3 to rotate.

[0047] Preferably, the rotating shaft 3 is fixed to the chassis 2 by a fixing member. The rotating shaft 3 is rotatable relative to the fixing member.

[0048] Furthermore, a torsion spring 11 is provided between the rotating shaft 3 and the fixed component. When the collision rod 1 drives the rotating shaft 3 to rotate, the torsion spring 11 twists to obtain elastic potential energy, thereby giving the rotating shaft 3 a tendency to recover, which is beneficial to the reset movement of the system mechanism.

[0049] Preferably, one end of the crank 4 is connected to the shaft 3, and the other end is hinged to one end of the connecting rod 5. In this embodiment, the anti-collision unit has two cranks 4 and two connecting rods 5, which are symmetrically arranged on both sides of the brake base 6.

[0050] Preferably, the other end of the connecting rod 5 is hinged to the slider 7 disposed within the brake base 6, and can drive the slider 7 to reciprocate. The slider 7 is also hinged to one end of the rocker arm 8, the other end of the rocker arm 8 is hinged to the driven rod 9, and the other end of the driven rod 9 is hinged to the brake base 6. Furthermore, the driven rod 9 is provided with a brake pad 901 in the direction close to the brake disc 10. The reciprocating motion of the slider 7 drives the brake pad 901 to contact or move away from the brake disc 10, thereby locking or unlocking the brake disc 10.

[0051] Furthermore, in the anti-collision unit, there are two rocker arms 8 and two driven rods 9, which are symmetrically arranged on both sides of the brake disc 10. The brake disc 10 is clamped and locked by the brake pads 901 on the driven rods 9.

[0052] Preferably, the brake base 6 is provided with a slider stroke rod 603, and the slider 7 is sleeved on the slider stroke rod 603 and reciprocates on the slider stroke rod 603.

[0053] Furthermore, a return spring 601 is also sleeved on the slider stroke rod 603. The return spring 601 is located near the end of the vehicle body and is used to push the slider 7 to return to the front end of the vehicle body.

[0054] refer to Figure 7 As shown in the figure, the braking process of the device is illustrated. The process begins with the rotation of the collision rod 1. The rotation causes the torsion spring 11 to generate elastic potential energy, which then sequentially drives the rotating shaft 3, crank 4, and connecting rod 5 to rotate. This causes the slider 7 to move towards the tail end and compresses the return spring 601, generating elastic potential energy. This energy then sequentially drives the rocker arm 8 and the driven rod 9 to rotate. After the brake pad 901 makes full contact with the brake disc 10, the rear wheel axle 16 and the rear wheel 13 decelerate and come to a stop.

[0055] like Figure 8 As shown in the figure, the device reset process is illustrated. When the device moves away from the obstacle, the collision rod 1 no longer contacts the obstacle. At this time, the torsion spring 11, no longer under force, begins to release potential energy, causing the collision rod 1 and the rotating shaft 3 to rotate in the opposite direction. The combination structure of the crank 4 and connecting rod 5 is stretched, causing the slider 7 to move towards the front end. Simultaneously, the elastic potential energy released by the reset spring 601 facilitates the reset movement of the system mechanism. Then, the rocker arm 8 and the driven rod 9 begin to open, causing the brake pad 901 to separate from the brake disc 10, thus allowing the electric handcart to resume operation.

[0056] When the electric handcart of this invention accidentally starts due to improper operation in a construction elevator, it impacts the elevator wall at a high speed. At this point, the collision rod first contacts the elevator wall and triggers the braking system, causing the handcart to decelerate and stop, thus providing a certain degree of cushioning. Simultaneously, some of the kinetic energy is converted into the potential energy of the device, greatly reducing the impact force on the elevator wall and effectively ensuring the safe operation of the electric vehicle within the construction elevator.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric handcart, characterized in that, The electric handcart includes a chassis (2), a collision protection unit, and a brake disc (10) mounted on the rear wheel axle (16). The anti-collision unit is located on the bottom side of the chassis (2) and is configured to lock the brake disc (10) when the anti-collision unit comes into contact with and continues to approach the collision object, thereby achieving anti-collision of the electric handcart. The anti-collision unit includes: a collision rod (1), a rotating shaft (3), a crank (4), a connecting rod (5), a brake base (6), a slider (7), a rocker arm (8), and a driven rod (9); One end of the collision rod (1) is fixedly connected to the rotating shaft (3) and can drive the rotating shaft (3) to rotate; The rotating shaft (3) is fixed to the chassis (2) by a fastener; One end of the crank (4) is connected to the shaft (3), and the other end is hinged to one end of the connecting rod (5); The other end of the connecting rod (5) is hinged to the slider (7) located in the brake base (6), and can drive the slider (7) to reciprocate. The slider (7) is also hinged to one end of the rocker arm (8), the other end of the rocker arm (8) is hinged to the driven rod (9), and the other end of the driven rod (9) is hinged to the brake base (6); Furthermore, the driven rod (9) is provided with a brake pad (901) in the direction close to the brake disc (10). The reciprocating motion of the slider (7) drives the brake pad (901) to contact or move away from the brake disc (10), thereby locking or unlocking the brake disc (10).

2. The electric handcart as described in claim 1, characterized in that, In the anti-collision unit, there are two rocker arms (8) and two driven rods (9), which are symmetrically arranged on both sides of the brake disc (10). The brake disc (10) is clamped and locked by the brake pads (901) on the driven rods (9).

3. The electric handcart as described in claim 1, characterized in that, The brake base (6) is provided with a slider stroke rod (603), and the slider (7) is sleeved on the slider stroke rod (603) and reciprocates on the slider stroke rod (603).

4. The electric handcart as described in claim 3, characterized in that, A return spring (601) is also sleeved on the slider stroke rod (603). The return spring (601) is located near the end of the vehicle body and is used to push the slider (7) to return to the front end of the vehicle body.

5. The electric handcart as described in claim 1, characterized in that, In the anti-collision unit, there are two cranks (4) and two connecting rods (5), which are symmetrically arranged on both sides of the brake base (6).

6. The electric handcart as described in claim 1, characterized in that, A torsion spring (11) is provided between the rotating shaft (3) and the bottom fixing part of the chassis (2); when the collision rod (1) drives the rotating shaft (3) to rotate, the torsion spring (11) twists to obtain elastic potential energy, thereby making the rotating shaft (3) have a recovery tendency.

7. The electric handcart as described in claim 1, characterized in that, The electric handcart also includes an electric drive unit, which is located on the underside of the chassis (2) and is connected to the rear wheel axle (16) via a transmission structure to drive the rear wheels (13) at both ends of the rear wheel axle (106).

8. The electric handcart as described in claim 1, characterized in that, The electric handcart chassis (2) has two front wheels (12) at the front end, and the front wheels (12) are omnidirectional wheels.

9. The electric handcart as described in claim 1, characterized in that, The top side of the end of the chassis (2) is also provided with a handrail bracket (14), and a handrail (15) is installed at the bottom of the handrail bracket (14).

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