A hand truck and its battery locking device

Abstract

This invention relates to a battery locking structure for a transport vehicle, comprising a mounting plate fixed to the front frame, a vertical plate on the mounting plate, and a pressure plate hinged to the front end of the pressure plate. The pressure plate has a bent plate facing the mounting plate at its front end. The pressure plate rotates around the vertical plate to switch between a locked state and an unfolded state. In the locked state, the bent plate at the front end of the pressure plate presses against the battery; in the unfolded state, the pressure plate causes the bent plate to separate from the battery, releasing the restriction on the battery. This invention also relates to a transport vehicle having the above-described battery locking structure. The operation principle of this battery locking device is simple and convenient, and battery loading and unloading do not require other tools, thus improving the speed of battery replacement.

Description

Technical Field

[0001] This invention relates to the field of transport vehicle technology, and more particularly to a battery locking device for transport vehicles. Background Technology

[0002] With the rapid development of logistics in my country, the use of pedal-operated pallet trucks is becoming increasingly frequent. Currently, the front frame of pedal-operated pallet trucks is generally divided into two types: non-side-pull and side-pull. The side-pull type has two battery installation methods: 1. Placing the battery on a battery base plate and fixing it with a removable side plate; this requires high precision in manufacturing and is less economical; 2. Placing the battery on a battery base plate and fixing it with bolts; this is less practical. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a transport vehicle and its battery locking device. The battery locking device has a simple and convenient operating principle, and the battery can be loaded and unloaded without the aid of other tools, thereby improving the battery replacement speed.

[0004] A battery locking structure for a transport vehicle includes a mounting plate fixed to a front frame. The mounting plate has a vertical plate hinged to the front end of a pressure plate. The front end of the pressure plate has a bent plate facing the mounting plate. The pressure plate rotates around the vertical plate, switching between a locked state and an unfolded state. In the locked state, the bent plate at the front end of the pressure plate presses against the battery. In the unfolded state, the pressure plate causes the bent plate to separate from the battery, releasing the restriction on the battery. A retaining assembly is provided between the vertical plate and the pressure plate to hold the pressure plate in its current state. The retaining assembly includes a rotating plate and a limiting bolt. The front end of the rotating plate is hinged to the vertical plate, and the rear end of the rotating plate is connected to the limiting bolt. The pressure plate has a sliding groove along its length. The limiting bolt is movably disposed in the sliding groove. In the locked state, the limiting bolt engages with a first positioning part. The sliding groove has a first positioning part and a second positioning part along the length of the pressure plate. In the unfolded state, the limiting bolt engages with the second positioning part.

[0005] Preferably, the retaining assembly further includes a tension spring, one end of which is fixed to the upright plate and the other end of which is fixed to the pressure plate. In the locked state, the tension spring is stretched, and in the unfolded state, the spring's rebound force holds the pressure plate in its current position.

[0006] Preferably, the first positioning part and the second positioning part are located below other parts of the slide.

[0007] Preferably, the mounting plate is provided with a buffer block, which is disposed opposite to the bending plate, and the battery is clamped between the buffer block and the bending plate in the locked state.

[0008] Preferably, the buffer block is made of an elastic and deformable material, and in the locked state, the buffer block is squeezed and compressed.

[0009] Preferably, the pressure plate has a notch at the front, and the bending plate includes a horizontal plate and a vertical plate fixed to the front end of the horizontal plate. The horizontal plate is welded and fixed in the notch of the pressure plate. A reinforcing rib is provided between the horizontal plate and the vertical plate of the bending plate, and the reinforcing rib is connected to the pressure plate.

[0010] Preferably, the mounting plate includes a bottom connecting plate and a side connecting plate that are perpendicular to each other. The side connecting plate cooperates with the bending plate to clamp the battery. The bottom connecting plate is provided with an oblong hole, and the mounting plate is fixed to the front frame at the oblong hole.

[0011] Preferably, the upper part of the upright plate extends rearward to form a pressure plate connecting part, and the side connecting plate forms a support part extending rearward, the support part supporting the pressure plate connecting part from below.

[0012] Preferably, the upright plate includes a first upright plate and a second upright plate arranged side by side, and the pressure plate is hinged between the first upright plate and the second upright plate by a pin, and the pin is connected to the first upright plate by a coiled spring pin.

[0013] Another object of the present invention is to provide a transport vehicle including the battery locking structure of the transport vehicle described in any of the preceding claims.

[0014] This invention, employing the aforementioned structure, uses a downward-pressing plate to press the bent plate at its front end against the battery, or pulls the plate up to detach the bent plate from the battery. Simultaneously, a rotating plate moves a limiting bolt along the plate's groove to the first or second positioning part, locking the plate in either a locked or unfolded state. This single action achieves both locking and unlocking of the battery, simplifying operation and eliminating the need for additional tools, thus increasing battery replacement speed and work efficiency. Furthermore, the manufacturing requirements of this structure are lower than those for detachable side panels, reducing overall machine manufacturing costs. Attached Figure Description

[0015] Figure 1 A schematic diagram showing the installation position of the battery locking structure in the transport vehicle;

[0016] Figure 2 This is a schematic diagram of the battery locking mechanism in the locked state.

[0017] Figure 3 This is a schematic diagram of the battery locking mechanism in its deployed state.

[0018] Figure 4 Exploded view of the battery locking structure;

[0019] Figure 5 A structural schematic diagram of the mounting plate, its upper plate, and the plug-in mounting plate;

[0020] Figure 6 This is a structural diagram of the pressure plate and bending plate;

[0021] Figure 7 This is a schematic diagram of the rotating plate structure.

[0022] Figure label:

[0023] Front frame 01, battery 02,

[0024] Pressure plate 1, slide groove 11, first positioning part 111, second positioning part 112.

[0025] 2. Rotating plate, 3. Limiting bolt, 4. Pin, 5. Connector, 6. Tension spring, 7. Bending plate, 71. Horizontal plate, 72. Vertical plate, 9. Buffer block, 10. Mounting plate, 14. First vertical plate, 12. Second vertical plate, 13. Insertor mounting plate. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below. Example

[0027] This embodiment provides a battery locking structure for a transport vehicle. For example... Figure 2-4 As shown, the device includes a mounting plate 10 fixed to the front frame 01. The mounting plate 10 has a vertical plate hinged to the front end of a pressure plate 1. The front end of the pressure plate 1 has a bent plate facing the mounting plate 10, which is moved by the pressure plate 1. The battery 02 has a locking part that matches the shape of the bent plate, allowing the bent plate to lock the battery 02 in place.

[0028] The pressure plate 1 rotates around the vertical plate, switching between a locked state and an unfolded state. For example... Figure 2 As shown, in the locked state, the front end of the battery abuts against the mounting plate 10, and the bent plate at the front end of the pressure plate 1 presses the battery tightly from the rear, preventing the battery from moving; Figure 3 As shown, in the unfolded state, the pressure plate 1 causes the bending plate to separate from the battery, releasing the bending plate's restriction on the battery, at which point the battery can move. Therefore, by changing the contact state between the bending plate and the battery, the battery can be locked or unlocked, resulting in a simple structure. Furthermore, the bending plate is moved by the pressure plate 1, making operation convenient.

[0029] A retaining assembly is provided between the upright plate and the pressure plate 1 to hold the pressure plate 1 in its current state. The retaining assembly includes a rotating plate 2 and a limiting bolt 3. The front end of the rotating plate 2 is hinged to the upright plate, and the rear end of the rotating plate 2 is connected to the limiting bolt 3. The pressure plate 1 has a sliding groove 11 along its length. The limiting bolt 3 is movably disposed in the sliding groove 11. In the locked state, the limiting bolt 3 is engaged with the first positioning part 111. The sliding groove 11 has a first positioning part 111 and a second positioning part 112 along the length of the pressure plate 1. In the unfolded state, the limiting bolt 3 is engaged with the second positioning part 112. In this embodiment, the first positioning part 111 and the second positioning part 112 are located below other parts of the sliding groove 11, thereby enabling the limiting bolt 3 to be limited in the length of the pressure plate 1 through the first positioning part 111 and the second positioning part 112, thus locking the position of the pressure plate 1. In the above structure, since the front end of the rotating plate 2 is hinged to the upright plate, and the rear end of the rotating plate 2 is connected to the pressure plate 1 through the limiting bolt 3 at the slide groove 11 of the pressure plate 1, when the pressure plate 1 rotates, it will drive the front end of the rotating plate 2 to rotate around its hinge point. At the same time, the rear end of the rotating plate 2 will drive the limiting bolt 3 to move along the slide groove 11. Thus, it is only necessary to press down the pressure plate 1 or lift the pressure plate 1 to switch between the locked state and the unfolded state, and it can automatically lock in the switched state, which is convenient to operate.

[0030] In this embodiment, the pressure plate 1 has a notch at its front. The bending plate includes a horizontal plate 71 and a vertical plate 72 fixed to the front end of the horizontal plate 71. The horizontal plate 71 is welded and fixed in the notch of the pressure plate 1. The horizontal plate 71 is arranged along the length of the vertical plate 72 to connect the vertical plate 72 and the pressure plate 1. It cooperates with the notch at the front end of the pressure plate 1 to connect the bending plate and the pressure plate 1 into one unit, which can enhance the strength of the vertical plate 72 and act as a reinforcing rib.

[0031] In a preferred embodiment, the retaining assembly further includes a tension spring 6, one end of which is fixed to the upright plate, and the other end of which is fixed to the pressure plate 1. In the locked state, the tension spring 6 is stretched, and in the unfolded state, the restoring force of the tension spring 6 holds the pressure plate 1 in its current position. Figure 1 As shown, the battery locking structure is located near the battery box cover. When the cover is opened, if the current battery locking structure is in the unfolded state, the tension spring 6 will hold the pressure plate 1 in the upturned position and push the cover open. At this time, the cover cannot be closed without external force. This setting can ensure that the battery locking device is in the locked state before the cover can be closed, and the vehicle can drive, thus ensuring the safety of vehicle use.

[0032] like Figure 5As shown, the mounting plate 10 in this embodiment includes a bottom connecting plate and a side connecting plate that are perpendicular to each other. The side connecting plate cooperates with the bending plate to clamp the battery. The bottom connecting plate has an oblong hole, and the mounting plate 10 is fixed to the front frame 01 at the oblong hole. By setting the connection between the mounting plate 10 and the front frame 01 as an oblong hole, the front and rear installation positions of the mounting plate 10 can be adjusted according to actual needs. Preferably, the mounting plate 10 has a buffer block 9 on the side facing the bending plate. The buffer block 9 is arranged opposite to the bending plate. In this embodiment, the buffer block 9 is arranged on the side connecting plate. In the locked state, the battery is clamped between the buffer block 9 and the bending plate, thereby providing a buffering effect for the installed battery. The buffer block 9 is made of an elastic deformable material. In the locked state, the buffer block 9 is squeezed and compressed, thereby effectively pressing the battery to prevent it from loosening during vehicle operation. In this embodiment, the buffer block 9 can be made of PU material.

[0033] The upper part of the upright plate extends rearward to form a connecting portion for the pressure plate 1, and a supporting portion extending rearward is formed on the side connecting plate, which supports the connecting portion for the pressure plate 1 from below. Because the upper part of the upright plate extends rearward to form the connecting portion for the pressure plate 1, this arrangement creates a narrower neck on the upright plate. Therefore, the supporting portion ensures the strength of the upright plate and prevents it from breaking at the neck during subsequent use. In an embodiment, the upright plate may include a first upright plate 14 and a second upright plate 12 arranged side-by-side. The pressure plate 1 is hinged between the first upright plate 14 and the second upright plate 12 via a pin 4, and the pin 4 is connected to the first upright plate 14 via a coiled spring pin. The pin 4 passes through the first upright plate 14 and the second upright plate 12. By having the pin 4 supported by both upright plates, the stability of the pressure plate 1 during rotation relative to the upright plate during lifting and pressing is ensured. Furthermore, the coiled spring pin connecting the pin 4 and the upright plate allows the pin 4 to disengage from the upright plate, enhancing the connection reliability of the battery locking structure.

[0034] Combination Figure 6 and Figure 7 In this embodiment, the pin 4 passes through the hole a5 of the first upright plate 14, the hole b1 of the pressure plate 1, and the hole a2 of the second upright plate 12, connecting the three. Then, the pin 4 is connected to the hole a4 of the first upright plate 14 by a coiled spring pin. The hole d1 at the front end of the rotating plate 2 corresponds to the hole a1 on the second upright plate 12 and is connected by the connector 5. The hole d2 at the rear end of the rotating plate 2 is connected to the sliding groove 11 of the pressure plate 1 by a limiting bolt 3, and the limiting bolt 3 can slide along the sliding groove 11. One end of the tension spring 6 is hooked at the hole a3 of the first upright plate 14, and the other end is hooked at the hole b2 of the pressure plate 1, so that the elastic state of the spring can be changed as the pressure plate 1 is lifted and pressed down. In the locked state, the tension spring 6 is stretched, and in the locked state, the tension spring 6 is contracted.

[0035] Therefore, the locking structure of the aforementioned transport vehicle has the following advantages:

[0036] High efficiency: This device is simple in principle and easy to operate. It does not require any other tools to install or remove the battery, which increases the speed of battery replacement and thus improves work efficiency.

[0037] Economically, the process requirements of this device are lower compared to detachable side panels, which reduces the overall manufacturing cost.

[0038] For reliability, the buffer block 9 has a certain degree of elasticity, which can effectively press the battery tightly to prevent it from coming loose.

[0039] For safety, the battery cover can only be closed and the vehicle can only be driven when the battery locking device is in the locked state. Example

[0040] This embodiment provides a transport vehicle that uses the battery locking structure as described in Embodiment 1.

[0041] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery locking structure of a truck, characterized by comprising: The device includes a mounting plate fixed to the front frame, with a vertical plate hinged to the front end of a pressure plate. The pressure plate has a bent plate facing the mounting plate at its front end. The pressure plate rotates around the vertical plate, switching between a locked state and an unfolded state. In the locked state, the bent plate at the front end of the pressure plate presses against the battery. In the unfolded state, the pressure plate causes the bent plate to separate from the battery, releasing the restriction on the battery. A retaining assembly is provided between the vertical plate and the pressure plate to hold the pressure plate in its current state. The retaining assembly includes a rotating plate and a limiting bolt. The front end of the rotating plate is hinged to the vertical plate, and the rear end of the rotating plate is connected to the limiting bolt. The pressure plate has a sliding groove along its length, and the limiting bolt is movably disposed in the sliding groove. In the locked state, the limiting bolt engages with a first positioning part. The sliding groove has a first positioning part and a second positioning part along the length of the pressure plate. In the unfolded state, the limiting bolt engages with the second positioning part.

2. The battery locking structure of the cart according to claim 1, wherein The retaining assembly also includes a tension spring, one end of which is fixed to the upright plate and the other end of which is fixed to the pressure plate. In the locked state, the tension spring is stretched, and in the unfolded state, the spring's rebound force holds the pressure plate in its current position.

3. The battery locking structure of a transport vehicle according to claim 1, characterized in that, The first positioning part and the second positioning part are located at both ends of the slide groove along its length.

4. The battery locking structure of a transport vehicle according to claim 1, characterized in that, The mounting plate is provided with a buffer block, which is arranged opposite to the bending plate. In the locked state, the battery is clamped between the buffer block and the bending plate.

5. The battery locking structure of a transport vehicle according to claim 4, characterized in that, The buffer block is made of an elastic and deformable material. In the locked state, the buffer block is squeezed and compressed.

6. The battery locking structure of a transport vehicle according to claim 1, characterized in that, The pressure plate has a notch at the front, and the bending plate includes a horizontal plate and a vertical plate fixed to the front end of the horizontal plate. The horizontal plate is welded and fixed in the notch of the pressure plate.

7. The battery locking structure of a transport vehicle according to claim 1, characterized in that, The mounting plate includes a bottom connecting plate and a side connecting plate that are perpendicular to each other. The side connecting plate cooperates with the bending plate to clamp the battery. The bottom connecting plate is provided with an oblong hole, and the mounting plate is fixed to the front frame at the oblong hole.

8. The battery locking structure of a transport vehicle according to claim 7, characterized in that, The upper part of the upright plate extends rearward to form a pressure plate connecting part, and a support part extending rearward is formed on the side connecting plate, the support part supporting the pressure plate connecting part from below.

9. The battery locking structure of a transport vehicle according to claim 1, characterized in that, The upright plate includes a first upright plate and a second upright plate arranged side by side. The pressure plate is hinged between the first upright plate and the second upright plate by a pin, and the pin is connected to the first upright plate by a coiled spring pin.

10. A transport vehicle, characterized in that, The battery locking structure of the transport vehicle included in any one of claims 1-9.

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