Traveling and parking integrated braking equipment for micro-sized and small-sized loaders

Abstract

The utility model provides traveling and parking integrated braking equipment for a micro-sized loader and a small-sized loader, and belongs to the technical field of loader braking. Comprising a connecting frame, the connecting frame comprises a front axle, a rear axle and a universal transmission shaft, and the universal transmission shaft is located between the front axle and the rear axle; and the four sets of wheels are all installed on the connecting frame, and two sets of wheels are installed on the two sides of the front axle and the two sides of the rear axle correspondingly and used for driving the connecting frame to move. According to the utility model, the service brake is arranged at the input end of the central transmission small bevel gear shaft, so that the arrangement has the advantages that the braking torque required by the position is smaller than that required by the arrangement scheme, and a smaller brake can be adopted; due to the fact that the whole miniature loader is light in weight, and the hydrostatic transmission system has the braking assisting function on the whole loader, when the brake is arranged at the position, the service brake can completely bear the impact load of a downstream transmission system during braking.

Description

Technical Field

[0001] This utility model relates to the field of loading machine braking technology, and in particular to an integrated braking device for micro and small loaders that is both driving and parking. Background Technology

[0002] A loader is a type of earthmoving machinery widely used in construction projects such as highways, railways, buildings, hydropower, ports, and mines. The working principle of a loader is that the engine provides power, driving a hydraulic pump to generate high-pressure oil. This high-pressure oil enters the hydraulic cylinder through a control valve, pushing the working device to achieve actions such as lifting, lowering, and tilting the bucket. Simultaneously, the transmission system transmits the engine's power to the wheels or tracks, enabling the loader to move. During loading operations, the loader first travels to the material pile, inserts the bucket into the material, and then, under the control of the hydraulic system, raises the bucket to a certain height before transporting the material to the designated location for unloading.

[0003] In the prior art, traditional loader traveling brakes are located at the wheel rim, with braking force applied directly to the wheel hub. The parking brake is located at the output shaft of the gearbox. This design, with the traveling brake at the wheel rim, requires strong braking capacity and has a large structural size. Its advantage is that it reduces the impact on the transmission system during braking. However, due to the compact structure of micro and small loaders, it is difficult to implement this design in the overall machine layout. Therefore, this application provides an integrated traveling and parking brake device for micro and small loaders to meet the requirements. Utility Model Content

[0004] The technical problem this utility model aims to solve is to provide an integrated braking device for the traveling and parking of micro and small loaders. This addresses the issue of existing traditional loader systems where the traveling brake is located at the wheel rim, with braking force applied directly to the wheel hub, and the parking brake is located at the output shaft of the gearbox. This solution requires the traveling brake to have strong braking capacity and a relatively large structural size. Its advantage is that it reduces the impact on the transmission system during braking. However, due to the compact structure of micro and small loaders, this solution presents certain difficulties in overall machine layout.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an integrated braking device for the driving and parking of a micro / small loader, comprising: a connecting frame, the connecting frame including a front axle, a rear axle and a universal drive shaft, the universal drive shaft being located between the front axle and the rear axle; four sets of wheels, all mounted on the connecting frame, and configured such that two sets of wheels are mounted on each side of the front axle and the rear axle respectively, for driving the connecting frame to move; a reduction gearbox, installed before the universal drive shaft and the front axle, and configured to directly transmit power to the front axle, thereby reducing the speed of the two sets of wheels connected to the front axle; and a driving brake, installed between the universal drive shaft and the rear axle, and configured to transmit power to the rear axle through the universal drive shaft, thereby reducing the speed of the two sets of wheels connected to the rear axle.

[0006] Preferably, both the front axle and the rear axle include a central drive unit and two sets of connecting rods, with the two sets of connecting rods respectively installed on both sides of the central drive unit, and each set of connecting rods connected to a set of wheels.

[0007] Preferably, the service brake is installed at the input end of the small bevel gear shaft of the central transmission component to stop the rotation of the central transmission component.

[0008] Preferably, the service brake is a small brake to save space.

[0009] Preferably, it further includes: an electric parking brake, mounted on the service brake, for driving the service brake.

[0010] Compared with the prior art, this utility model has at least the following beneficial effects: 1. In the above solution, by setting the service brake and arranging it at the input end of the central transmission small bevel gear shaft, the advantage of this arrangement is that the braking torque required at this location is smaller than that of the aforementioned arrangement, and a smaller brake can be used; at the same time, since the overall weight of micro and small loaders is light, coupled with the braking assistance of the hydrostatic transmission system, the impact load on the downstream transmission system (i.e., the rear axle) when the service brake is placed in this position can be fully withstood by the transmission system. This solution effectively solves the problem of limited space for brake arrangement in the design of micro and small loaders. Through testing and market practice, this solution can fully meet the usage requirements of the whole machine.

[0011] 2. The electric parking brake uses special control logic to enable automatic adjustment of the parking brake gap. Attached Figure Description

[0012] Furthermore, the accompanying drawings, which form part of this specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0013] Figure 1This is an isometric view of the present invention;

[0014] Figure 2 This is a schematic diagram of the structural principle of this utility model.

[0015] [Figure Labels]

[0016] 1. Connecting frame; 2. Front axle; 3. Universal drive shaft; 4. Wheel; 5. Gearbox; 6. Service brake; 7. Rear axle; 9. Central drive unit; 10. Connecting rod.

[0017] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0018] The following is a detailed description of an integrated driving and parking braking device for micro and small loaders provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0019] Example 1: As Figures 1 to 2 As shown, an embodiment of this utility model provides an integrated braking device for the driving and parking of a micro / small loader, comprising: a connecting frame 1, the connecting frame 1 including a front axle 2, a rear axle 7 and a universal drive shaft 3, the universal drive shaft 3 being located between the front axle 2 and the rear axle 7; four sets of wheels 4, all mounted on the connecting frame 1, and configured such that two sets of wheels 4 are respectively mounted on both sides of the front axle 2 and the rear axle 7, for driving the connecting frame 1 to move; a reduction gearbox 5, installed before the universal drive shaft 3 and the front axle 2, and configured to directly transmit power to the front axle 2, thereby reducing the speed of the two sets of wheels 4 connected to the front axle 2; and a driving brake 6, installed between the universal drive shaft 3 and the rear axle 7, and configured to transmit power to the rear axle 7 through the universal drive shaft 3, thereby reducing the speed of the two sets of wheels 4 connected to the rear axle 7.

[0020] like Figures 1 to 2 As shown, both the front axle 2 and the rear axle 7 include a central transmission component 9 and two sets of connecting rods 10. The two sets of connecting rods 10 are respectively installed on both sides of the central transmission component 9, and each set of connecting rods 10 is connected to a set of wheels 4.

[0021] like Figures 1 to 2As shown, the service brake 6 is installed at the input end of the small bevel gear shaft of the central transmission component 9 and is used to stop the rotation of the central transmission component 9.

[0022] like Figures 1 to 2 As shown, the service brake 6 is a small brake to save space; the service brake 6 can be a BN-type spring-loaded electromagnetic safety brake.

[0023] Example 2: Figures 1 to 2 The system also includes: an electric parking brake, installed on the service brake 6, used to drive the service brake 6; the electric parking brake (not shown in the figure) employs special control logic to automatically adjust the parking brake clearance; the electric parking brake uses a DC motor to drive a screw, achieving a conversion from rotary motion to linear motion. When the motor rotates forward, it drives the screw to press the service brake 6 against the reduction gearbox 5 to achieve parking; when releasing the parking brake, the motor reverses, driving the screw back to release the brake. According to the above principle, if the step length of the screw pressing during forward rotation is equal to the step length of the screw pressing during release, the parking brake will eventually fail after the brake pads wear down normally. To solve this problem, a control logic with unequal step lengths is adopted in the motor's control logic. That is, in each parking operation cycle, the step length of the screw pressing during forward rotation is greater than the step length of the screw releasing during release. For example, the motor rotates forward, driving the screw to press for three steps (with a margin of one step), and when releasing, the motor reverses, driving the screw back two steps. The two steps when the screw retracts constitute the brake clearance, and the extra step when the screw tightens is used to compensate for brake pad wear. This control logic can both compensate for brake pad wear and maintain a constant brake clearance when the parking brake is released.

[0024] In the above scheme, the various operations of the control linkage between the connecting frame 1, the reduction gearbox 5, the service brake 6 and the wheel 4 are all existing technologies, controlled by existing control systems, which are common knowledge in this field and are understood by practitioners in this industry, so they will not be described in detail here.

[0025] The technical solution provided by this utility model is as follows: When the driver depresses the driving brake pedal, the braking signal is transmitted through the vehicle's braking control system. Depending on the specific transmission method of the vehicle's braking system (such as hydraulic), the force generated by the braking operation is transmitted to the service brake 6 located between the universal drive shaft 3 and the rear axle 7. The service brake 6 is installed at the input end of the small bevel gear shaft of the central transmission component 9 and uses a small brake (such as a BN series spring-loaded electromagnetic safety brake). When the braking signal is received, the service brake 6 starts to work and transmits the braking force to the rear axle 7 through its connection with the universal drive shaft 3. Since two sets of wheels 4 are installed on both sides of the rear axle 7, the braking torque generated by the service brake 6 hinders the rotation of the central transmission component 9, thereby reducing the speed of the two sets of wheels 4 connected to the rear axle 7, thus achieving the deceleration operation of the vehicle during driving.

[0026] When parking is required, the driver issues a parking brake command through the appropriate operating device (such as the handbrake, depending on the vehicle settings). The electric parking brake, installed on the service brake 6, receives the command and begins to operate. The electric parking brake consists of a DC motor driving a screw, converting rotary motion into linear motion. When the motor rotates forward, it drives the screw to press against the reduction gearbox 5 of the service brake 6. At this time, the service brake 6 is in operation, preventing vehicle movement by braking the central transmission component 9 and other related components, thus achieving parking. During this process, according to specific control logic, in each parking operation cycle, the screw step size during forward motor pressing is greater than the screw step size during release. For example, the motor rotates forward, driving the screw to press for three steps (with a one-step allowance). This unequal step length setting provides space for compensating for brake pad wear. When the parking brake needs to be released, the motor rotates backward, driving the screw to retract and releasing the service brake 6, allowing the vehicle to drive normally. At this time, the motor rotates backward, driving the screw to retract for two steps. The two steps when the screw retracts are the brake clearance. The one-step allowance when the screw is pressed during parking can be used to compensate for the normal wear of the brake pads during use. Thus, it not only compensates for the wear of the brake pads but also maintains a constant brake clearance when the parking brake is released.

[0027] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art can fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A micro / small loader's integrated traveling and parking braking device, characterized in that, include: A connecting frame (1) includes a front axle (2), a rear axle (7) and a universal drive shaft (3), wherein the universal drive shaft (3) is located between the front axle (2) and the rear axle (7); Four sets of wheels (4) are installed on the connecting frame (1), and are configured such that two sets of wheels (4) are installed on both sides of the front axle (2) and the rear axle (7) respectively, to drive the connecting frame (1) to move. The gearbox (5) is installed before the universal drive shaft (3) and the front axle (2) and is configured to directly transmit power to the front axle (2) so as to reduce the speed of the two sets of wheels (4) connected to the front axle (2); The service brake (6) is installed between the universal drive shaft (3) and the rear axle (7) and is configured to transmit the brake to the rear axle (7) through the universal drive shaft (3) so as to reduce the speed of the two sets of wheels (4) connected to the rear axle (7).

2. The integrated braking device for driving and parking of micro and small loaders according to claim 1, characterized in that, Both the front axle (2) and the rear axle (7) include a central transmission component (9) and two sets of connecting rods (10). The two sets of connecting rods (10) are respectively installed on both sides of the central transmission component (9), and each set of connecting rods (10) is connected to a set of wheels (4).

3. The integrated braking device for driving and parking of micro and small loaders according to claim 2, characterized in that, The service brake (6) is installed at the input end of the small bevel gear shaft of the central transmission component (9) and is used to stop the rotation of the central transmission component (9).

4. The integrated braking device for driving and parking of micro and small loaders according to claim 1, characterized in that, The service brake (6) is a small brake to save space.

5. The integrated braking device for driving and parking of micro and small loaders according to claim 1, characterized in that, Also includes: An electric parking brake is installed on the service brake (6) and is used to drive the service brake (6).

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