Wheel folding, retracting and releasing mechanism applied to power-assisted tractor and using method of wheel folding, retracting and releasing mechanism

Abstract

The invention discloses a wheel folding and unfolding mechanism applied to a power-assisted tractor and a using method. The wheel folding and unfolding mechanism comprises a chassis shell. The upper bearing is connected with the chassis shell; the folding device is arranged on the chassis shell; and the wheels are connected with the folding device. An original welding mode is upgraded into a foldable mechanism, rapid folding and storage of the power-assisted tractor are achieved, the storage size of the whole tractor is reduced, and single-person operation is facilitated. When the motor extends, the gear and the rack act to tighten the tractor, when the motor retracts, the wheels are opened, and folding storage of the power-assisted tractor is automatically achieved. And linear motion of the electric cylinder is converted into rotation of folding storage through the gear and the rack, manual operation is not needed, and only one-key folding is needed. The folding storage mechanism has the advantages that the folding storage function of the upper half vehicle and the folding function of the wheels are achieved, the overall storage size is further reduced, carrying and mounting are convenient, and the practicability and portability of the mechanism are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing and wheel folding and retracting mechanisms, and in particular to a wheel folding and retracting mechanism applied to a power-assisted tractor and a use method thereof. Background Art

[0002] At present, workers in the fields of firefighting and earthquake rescue carry a large amount of heavy work equipment when performing rescue work. The main mode of transportation is manpower or power-assisted tractors for transportation and work. However, when encountering some sudden situations and rugged roads that are inconvenient to walk on, multiple workers are required to carry the equipment as a whole, which not only hinders the movement, but also greatly consumes the physical strength of the rescuers. Therefore, the portability of power-assisted tractor equipment is particularly important.

[0003] The power tractors currently on the market are all part of an integral whole, especially the wheels are all connected to the main body. The storage volume is large during transportation, making it difficult to achieve convenient transportation, and the volume of the box used for storage will also increase accordingly. During use, multiple people are required to move it out of the transport vehicle, which is inconvenient to operate.

[0004] In the prior art, the wheels of existing tractors are integrally connected and welded to the vehicle body. The overall equipment size is large, and the portability and transportability are poor. Other related patents at home and abroad: An emergency rescue portable vehicle (patent number: CN202111210060.2), using an invention patent to disclose an emergency rescue portable vehicle. This invention uses an upper folding component to recover and place the device. The overall size is large and inconvenient to carry. An accompanying protection electric tractor (patent number: CN202011332581.0), using an invention patent to disclose an accompanying protection electric tractor that uses the upper connection module and the lower load-bearing module to rotate so that the mechanism can be retracted and released, and the overall operation process is relatively complicated.

[0005] In summary, there is at least one of the following technical problems:

[0006] The wheels are all connected to the main body, and the storage volume is large during transportation, making it difficult to achieve convenient transportation. In addition, the volume of the box used for storage will also increase. During use, multiple people are required to move it out of the transport vehicle, which is inconvenient to operate.

[0007] The connection module at the upper end and the bearing module at the lower end rotate to allow the mechanism to be retracted and extended, and the overall operation process is relatively complicated. Summary of the invention

[0008] The main purpose of the present invention is to provide a wheel folding and retracting mechanism and a method for using the wheel folding and retracting mechanism for a power-assisted tractor, so as to solve the problem that the wheels in the prior art are connected to the main body, the storage volume is large during transportation, and it is difficult to achieve convenient transportation, and the volume of the box used for storage will also increase accordingly, and it is inconvenient to move the wheel out of the transport vehicle when in use. The connection module at the upper end and the bearing module at the lower end rotate to allow the mechanism to be retracted and extended, and the overall operation process is relatively complicated.

[0009] In order to achieve the above object, according to one aspect of the present invention, a wheel folding and retracting mechanism for a power-assisted tractor is provided, comprising:

[0010] Chassis shell;

[0011] An upper bearing, wherein the upper bearing is connected to the chassis shell;

[0012] A folding device, the folding device being arranged on the chassis shell;

[0013] Wheels are connected to the folding device.

[0014] Preferably, the folding device comprises:

[0015] Linear motors;

[0016] A rack seat, wherein the rack seat is connected to the linear motor;

[0017] A gear shaft, on which a gear is provided, and the gear cooperates with a rack seat;

[0018] A transfer shaft, the transfer shaft being hinged to the gear shaft;

[0019] A wheel rocker arm is arranged on the adapter shaft.

[0020] Preferably, the gear shaft and the adapter shaft are connected via an adapter block.

[0021] Preferably, the linear motor comprises an inner tube and an outer tube, and the outer tube is sleeved on the inner tube.

[0022] Preferably, wheels are provided at both ends of the wheel rocker arm.

[0023] Preferably, the outer tube is fixed in a fixing seat on the chassis shell.

[0024] Preferably, the inner tube of the linear motor is connected to a rack seat, and the rack seat moves in a groove at the bottom of the chassis shell.

[0025] Preferably, the rack at the bottom of the gear seat drives the gear shaft to rotate, and the gear shaft transmits the rotation to the adapter shaft through the adapter block.

[0026] Preferably, the adapter shaft is fixed in a fixing seat at the bottom of the chassis shell, and the adapter shaft drives the wheel rocker arm to swing.

[0027] According to another aspect of the present invention, there is provided a method for using a wheel folding and retracting mechanism applied to a power-assisted tractor, comprising:

[0028] In the unfolded state, the chassis is in the unfolded state, the linear motor is activated, the inner tube is pulled back, the rack seat is driven to rotate clockwise, the adapter shaft is driven to rotate clockwise through the adapter block, and the wheel rocker arm is swung to the horizontal position;

[0029] In the folded storage state, the chassis is in a folded state, the linear motor operates, pushes out the inner tube, drives the rack seat to rotate counterclockwise, drives the adapter shaft to rotate counterclockwise through the adapter block, swings the wheel rocker arm to the folded position, and the two wheels are close together.

[0030] The application of the technical solution of the present invention has the following technical effects:

[0031] The present invention discloses a wheel folding mechanism applied to a power-assisted tractor, which upgrades the original welding form into a foldable mechanism, realizes the rapid folding and storage of the power-assisted tractor, reduces the storage size of the whole machine, and is convenient for single-person operation.

[0032] The present invention adopts a gear rack mechanism. When the motor is extended, the gear rack acts to tighten the vehicle. When the motor is retracted, the wheels are opened, and the folding and storage of the power-assisted tractor is automatically realized.

[0033] The present invention adopts an electric cylinder for power drive, and converts the linear motion of the electric cylinder into rotation for folding and storage through a gear rack, so no manual operation is required and only one-button folding is required.

[0034] This design adopts a wheel folding and retracting mechanism, which not only has the folding and storage function of the upper half of the vehicle, but also has the folding function of the wheels, further reducing the overall storage size and facilitating carrying and installation.

[0035] The present invention can fold and store the wheels of the tractor during transportation or storage, thereby reducing the overall structure and storage size for easy carrying and transportation, and improving the practicability and portability of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 It shows a structural schematic diagram of a wheel folding and retracting mechanism applied to a power-assisted tractor according to the present invention;

[0038] Figure 2 Shows Figure 1 A view of a folding mechanism of a wheel folding and retracting mechanism applied to a power-assisted tractor;

[0039] Figure 3 Shows Figure 1 A view of a linear motor used in a wheel folding and retracting mechanism of a power-assisted tractor;

[0040] Figure 4 Shows Figure 1 A view of a gear rack at the bottom of a chassis of a wheel folding and retracting mechanism for a power-assisted tractor;

[0041] Figure 5 Shows Figure 1 A view of the unfolded state of the wheel folding and retracting mechanism applied to the power-assisted tractor;

[0042] Figure 6 Shows Figure 1 A folded state view of a wheel folding and retracting mechanism applied to a power-assisted tractor.

[0043] The above drawings include the following reference numerals:

[0044] Upper bearing 1; chassis shell 2; folding device 3; linear motor 31; outer tube 311; inner tube 312; rack seat 32; gear shaft 33; adapter block 34; adapter shaft 35; wheel rocker arm 36; wheel 4. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] like Figures 1 to 6 As shown, an embodiment of the present invention provides a wheel 4 folding and retracting mechanism for a power-assisted tractor, comprising: a chassis shell 2; an upper support 1, the upper support 1 being connected to the chassis shell 2; a folding device 3, the folding device 3 being arranged on the chassis shell 2; and a wheel 4, the wheel 4 being connected to the folding device 3.

[0047] In this embodiment, the folding device 3 includes: a linear motor 31; a rack seat 32, the rack seat 32 is connected to the linear motor 31; a gear shaft 33, the gear shaft 33 is provided with a gear, and the gear cooperates with the rack seat 32; a transfer shaft 35, the transfer shaft 35 is hinged with the gear shaft 33; a wheel 4 rocker arm 36, the wheel 4 rocker arm 36 is passed through the transfer shaft 35. The gear shaft 33 and the transfer shaft 35 are connected through a transfer block 34. The linear motor 31 includes an inner tube 312 and an outer tube 311, and the outer tube 311 is sleeved on the inner tube 312. The wheel 4 rocker arm 36 is provided with wheels 4 at both ends. The outer tube 311 is fixed in a fixed seat on the chassis shell 2. The inner tube 312 of the linear motor 31 is connected to the rack seat 32, and the rack seat 32 moves in the groove at the bottom of the chassis shell 2. The rack at the bottom of the gear seat drives the gear shaft 33 to rotate, and the gear shaft 33 transmits the rotation to the transfer shaft 35 through the transfer block 34. The transfer shaft 35 is fixed in the fixing seat at the bottom of the chassis shell 2, and the transfer shaft 35 drives the wheel 4 rocker arm 36 to swing.

[0048] Specifically, in view of the problems that the tractor is inconvenient to carry and has a large storage size, it is proposed to use the wheel 4 folding method to enable the tractor to store the wheel 4, which reduces the storage size and greatly improves the convenience of operation. The purpose is to change the storage form of the existing tractor wheel 4, so that the storage volume of the product is further reduced, and the product is portable for easy installation and transportation. The present invention provides a wheel 4 folding mechanism and a method of use for a power tractor. The device of the present invention changes the chassis mechanism of the existing tractor, and is divided into four parts: an upper load-bearing part 1, a chassis shell 2, a folding device 3 and a wheel 4. The folding device 3 of the present invention is mainly composed of a linear motor 31, a rack seat 32, a gear shaft 33, an adapter block 34, an adapter shaft 35, and a wheel 4 rocker arm 36. The outer tube 311 in the linear motor 31 needs to be fixed in a fixed seat on the chassis shell 2, and the inner tube 312 in the linear motor 31 is connected to the rack seat 32. The rack seat 32 can move in the groove at the bottom of the chassis shell 2. The rack at the bottom of the rack seat 32 drives the gear shaft 33 to rotate, and the rotation is transmitted to the adapter shaft 35 through the adapter block 34. The other end of the adapter shaft 35 is fixed in the fixed seat at the bottom of the chassis shell 2. The adapter shaft 35 drives the rocker arm 36 of the wheel 4 to swing, and finally realizes the function of storing the wheel 4. The device of the present invention has two states during operation. The first state is the unfolded use state, and the chassis is in the unfolded state. The linear motor 31 is actuated to pull back the inner tube 312, drive the rack seat 32 to rotate clockwise, and drive the adapter shaft 35 to rotate clockwise through the adapter block 34, and swing the rocker arm 36 of the wheel 4 to a horizontal position. This working condition is like Figure 1The second state is the folded storage state, and the chassis is in the folded state. The linear motor 31 is activated to push out the inner tube 312, drive the rack seat 32 to rotate counterclockwise, and drive the adapter shaft 35 to rotate counterclockwise through the adapter block 34, swinging the rocker arm 36 of the wheel 4 to the folded position, and the two wheels 4 are close together. This working condition is as follows Figure 1 shown.

[0049] Another embodiment of the present invention provides a method for using a folding and retracting mechanism of a wheel 4 applied to a power-assisted tractor, comprising:

[0050] In the unfolded state, the chassis is in the unfolded state, the linear motor 31 is actuated, the inner tube 312 is pulled back, the rack seat 32 is driven to rotate clockwise, the adapter shaft 35 is driven to rotate clockwise through the adapter block 34, and the rocker arm 36 of the wheel 4 is swung to a horizontal position;

[0051] In the folded storage state, the chassis is in a folded state, the linear motor 31 is actuated, the inner tube 312 is pushed out, the rack seat 32 is driven to rotate counterclockwise, and the adapter shaft 35 is driven to rotate counterclockwise through the adapter block 34, the rocker arm 36 of the wheel 4 is swung to the folded position, and the two wheels 4 are close together.

[0052] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0053] The present invention discloses a wheel 4 folding mechanism applied to a power-assisted tractor, which upgrades the original welding form into a foldable mechanism, realizes the rapid folding and storage of the power-assisted tractor, reduces the storage size of the whole machine, and is convenient for single-person operation.

[0054] The present invention adopts a gear rack mechanism. When the motor is extended, the gear rack acts to tighten the vehicle. When the motor is retracted, the wheels 4 are opened, and the folding and storage of the power-assisted tractor is automatically realized.

[0055] The present invention adopts an electric cylinder for power drive, and converts the linear motion of the electric cylinder into rotation for folding and storage through a gear rack, so no manual operation is required and only one-button folding is required.

[0056] The present invention adopts the wheel 4 folding and retracting mechanism, which not only has the folding and storage function of the upper half of the vehicle but also has the folding function of the wheel 4, further reducing the overall storage size and facilitating carrying and installation.

[0057] The present invention can fold and store the wheels 4 of the tractor during transportation or storage, thereby reducing the overall structure and storage size for easy carrying and transportation, thereby improving the practicability and portability of the mechanism.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wheel folding and retracting mechanism for a power-assisted tractor, characterized in that: include: Chassis shell; An upper bearing, wherein the upper bearing is connected to the chassis shell; A folding device, the folding device being arranged on the chassis shell; Wheels are connected to the folding device.

2. The wheel folding and retracting mechanism for a power-assisted tractor according to claim 1, characterized in that: The folding device comprises: Linear motors; A rack seat, wherein the rack seat is connected to the linear motor; A gear shaft, on which a gear is provided, and the gear cooperates with a rack seat; A transfer shaft, the transfer shaft being hinged to the gear shaft; A wheel rocker arm is arranged on the adapter shaft.

3. The wheel folding and retracting mechanism for a power-assisted tractor according to claim 2, characterized in that: The gear shaft and the adapter shaft are connected via an adapter block.

4. The wheel folding and retracting mechanism for a power-assisted tractor according to claim 2, characterized in that: The linear motor comprises an inner tube and an outer tube, and the outer tube is sleeved on the inner tube.

5. The wheel folding and retracting mechanism for a power-assisted tractor according to claim 1, characterized in that: Wheels are arranged at both ends of the wheel rocker arm.

6. The wheel folding and retracting mechanism for a power-assisted tractor according to claim 4, characterized in that: The outer tube is fixed in a fixing seat on the chassis shell.

7. The wheel folding and retracting mechanism for a power-assisted tractor according to claim 2, characterized in that: The inner tube of the linear motor is connected to a rack seat, and the rack seat moves in a groove at the bottom of the chassis housing.

8. The wheel folding and retracting mechanism for a power-assisted tractor according to claim 2, characterized in that: The rack at the bottom of the gear seat drives the gear shaft to rotate, and the gear shaft transmits the rotation to the adapter shaft through the adapter block.

9. The wheel folding and retracting mechanism for a power-assisted tractor according to claim 2, characterized in that: The adapter shaft is fixed in a fixing seat at the bottom of the chassis shell, and the adapter shaft drives the wheel rocker arm to swing.

10. A method for using a wheel folding and retracting mechanism for a power-assisted tractor, based on the wheel folding and retracting mechanism for a power-assisted tractor according to any one of claims 1 to 9, characterized in that: include: In the unfolded state, the chassis is in the unfolded state, the linear motor is activated, the inner tube is pulled back, the rack seat is driven to rotate clockwise, the adapter shaft is driven to rotate clockwise through the adapter block, and the wheel rocker arm is swung to the horizontal position; In the folded storage state, the chassis is in a folded state, the linear motor operates, pushes out the inner tube, drives the rack seat to rotate counterclockwise, drives the adapter shaft to rotate counterclockwise through the adapter block, swings the wheel rocker arm to the folded position, and the two wheels are close together.

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