Crawler chassis

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a caterpillar band chassis which comprises a bottom frame and a power mechanism, and the power mechanism comprises two driving wheels, two guide wheels, two caterpillar bands, two supporting assemblies, two tensioning assemblies and two weight supporting assemblies. A tensioning air cylinder in an existing tensioning assembly achieves tensioning adjustment on the crawler belt by adjusting the height of a supporting plate, on the premise that normal rotation of a guide wheel, a driving wheel and each thrust wheel is not affected, the height between the supporting plate and the thrust plates is freely controlled, a plurality of spring pieces are used for supporting in the period, the reverse acting force on the tensioning air cylinder is reduced, and the tensioning effect of the crawler belt is improved. The design is simple to operate, and the maximum passing height is limited by matching with the anti-collision plate on the front side of the frame body, so that the safety is improved, and the problems that the contact surfaces of the thrust wheels and the crawler belt are easy to misplace before and after the crawler belt is tensioned, the rotation frequency of each thrust wheel cannot be guaranteed to be synchronous, and the running of the chassis is influenced are solved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a tracked chassis. Background Technology

[0002] Rubber tracked chassis are suitable for small-scale light industry, agriculture, and mountainous sectors. Light industry, agriculture, and mountainous sectors generally use agricultural machinery weighing between one and four tons, while the construction machinery industry mostly uses it for transportation machinery weighing four to ten tons. Tracked chassis are generally made of rubber or steel tracks. The track tension in existing tracked chassis is not easy to adjust, making them relatively inconvenient to use.

[0003] Existing tracked chassis travel mechanisms are widely used in construction machinery, tractors, and other field vehicles. The tracks are in contact with the ground, while the drive wheels are not. When the gearbox drives the drive wheels to rotate, the drive wheels, under the driving torque of the reducer, continuously roll the tracks from the rear through the meshing between the teeth on the drive wheels and the track chain. The track in contact with the ground exerts a backward force on the ground, while the ground correspondingly exerts a forward reaction force on the tracks. This reaction force is the driving force that propels the machine forward. When the driving force is sufficient to overcome the travel resistance, the support rollers roll forward on the track surface, thus moving the machine forward. The front and rear tracks of the entire tracked travel mechanism can be steered independently, thus reducing its turning radius.

[0004] However, in the aforementioned prior art, the track tensioning process can easily cause misalignment between the track rollers and the track contact surface, making it impossible to guarantee synchronous rotation of each track roller and affecting chassis operation. Summary of the Invention

[0005] The purpose of this utility model is to provide a tracked chassis that solves the problem in the prior art where misalignment of the support rollers and track contact surfaces can easily occur before and after track tensioning, and the rotation frequency of each support roller cannot be guaranteed to be synchronized, thus affecting the chassis's driving.

[0006] To achieve the above objectives, this utility model provides a tracked chassis, including a chassis and a power mechanism. The power mechanism includes two drive wheels, two guide wheels, two tracks, two support components, two tensioning components, and two load-bearing components. Each load-bearing component is fixedly connected to a corresponding tensioning component and is located below the corresponding tensioning component. Each tensioning component is fixedly connected to a corresponding support component and is located below the corresponding support component. Both support components are fixedly connected to the chassis and are located below the chassis. Each track is fitted onto a corresponding load-bearing component. The two guide wheels and the two drive wheels are rotatably connected to the chassis and are located on both sides of the chassis.

[0007] Each of the support components includes a support plate and two upright plates. The upper ends of the two upright plates are fixedly connected to the base frame and located below the base frame. The support plate is fixedly connected to the two upright plates and located at the lower end of the two upright plates.

[0008] Each tensioning assembly includes two tensioning cylinders and multiple springs. Each spring is fixedly connected to the support plate and located below the support plate. The two tensioning cylinders are fixedly connected to the support plate and located above the support plate.

[0009] Each of the support components includes a support plate and multiple support rollers. Each support roller is rotatably connected to the support plate and is located on one side of the support plate. The support plate is fixedly connected to the output end of the corresponding tensioning cylinder.

[0010] The base frame includes a frame body, a gearbox, multiple tow wheels, and a crash plate. The crash plate is fixedly connected to the frame body and located on the front side of the frame body. Each tow wheel is rotatably connected to the frame body and located on both sides of the frame body. The gearbox is fixedly connected to the frame body and located above the frame body.

[0011] This utility model discloses a tracked chassis. The tensioning cylinder within the tensioning assembly adjusts the tension of the track by changing the height of the support plate. Without affecting the normal rotation of the guide wheel, drive wheel, and each support roller, the height between the support plate and the support plate is freely controlled. Multiple spring components provide support during this process, reducing the reverse force on the tensioning cylinder. This design is simple to operate and, in conjunction with the anti-collision plate on the front side of the frame, limits the maximum passage height, improving safety. It also solves the problem that misalignment of the support rollers and track contact surfaces can easily occur before and after track tensioning, leading to inconsistent rotation frequencies of the support rollers and affecting chassis operation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of a tracked chassis according to this utility model.

[0014] Figure 2 This is a top view of a tracked chassis according to this utility model.

[0015] Figure 3 This is a front view of a tracked chassis according to this utility model.

[0016] Figure 4 This is the utility model Figure 3 A sectional view along line AA.

[0017] Figure 5 This is the utility model Figure 4 Enlarged view of the local structure at point B.

[0018] 101-Underframe, 102-Power mechanism, 103-Drive wheel, 104-Guide wheel, 105-Track, 106-Support assembly, 107-Tensioner assembly, 108-Support assembly, 109-Support plate, 110-Upright plate, 111-Tensioner cylinder, 112-Spring component, 113-Support plate, 114-Support roller, 115-Frame, 116-Gearbox, 117-Torque roller, 118-Bumper plate. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please see Figures 1-5 ,in Figure 1 This is a schematic diagram of the overall structure of a tracked chassis according to this utility model. Figure 2 This is a top view of a tracked chassis according to this utility model. Figure 3 This is a front view of a tracked chassis according to this utility model. Figure 4 This is the utility model Figure 3 AA-line sectional view, Figure 5 This is the utility model Figure 4 Enlarged view of the local structure at point B.

[0021] This utility model provides a tracked chassis, including a base frame 101 and a power mechanism 102. The power mechanism 102 includes two drive wheels 103, two guide wheels 104, two tracks 105, two support components 106, two tensioning components 107, and two support components 108. Each support component 106 includes a support plate 109 and two upright plates 110. Each tensioning component 107 includes two tensioning cylinders 111 and multiple springs 112. Each support component 108 includes a support plate 113 and multiple support rollers 114. The base frame 101 includes a frame body 115, a gearbox 116, multiple tow wheels 117, and a crash plate 118.

[0022] In this specific embodiment, each of the supporting components 108 is fixedly connected to the corresponding tensioning component 107, each of the tensioning components 107 is fixedly connected to the corresponding support component 106, both support components 106 are fixedly connected to the base frame 101, each track 105 is sleeved on the corresponding supporting component 108, both guide wheels 104 and both drive wheels 103 are rotatably connected to the base frame 101, the upper ends of both upright plates 110 are fixedly connected to the base frame 101, the support plate 109 is fixedly connected to the two upright plates 110, each spring 112 is fixedly connected to the support plate 109, both tensioning cylinders 111 are fixedly connected to the support plate 109, each support wheel 114 is rotatably connected to the support plate 113, the support plate 113 is fixedly connected to the output end of the corresponding tensioning cylinder 111, and the anti-collision plate 118 is connected to the frame 11. 5. Fixed connection: Each of the towing rollers 117 is rotatably connected to the frame 115, and the gearbox 116 is fixedly connected to the frame 115. The tensioning cylinder 111 in the tensioning assembly 107 adjusts the tension of the track 105 by adjusting the height of the support plate 109. Without affecting the normal rotation of the guide wheel 104, the drive wheel 103, and each support roller 114, the height between the support plate 109 and the support plate 113 can be freely controlled. During this process, multiple springs 112 provide support, reducing the reverse force on the tensioning cylinder 111. This design is simple to operate and, together with the anti-collision plate 118 on the front side of the frame 115, limits the maximum passing height, improving safety. At the same time, it solves the problem that the contact surface between the support roller 114 and the track 105 is easily misaligned before and after the track 105 is tensioned, and the rotation frequency of each support roller 114 cannot be guaranteed to be synchronized, affecting the chassis driving.

[0023] Each of the support components 108 is located below the corresponding tensioning component 107, each of the tensioning components 107 is located below the corresponding support component 106, and both support components 106 are located below the base frame 101. The two guide wheels 104 and the two drive wheels 103 are located on both sides of the base frame 101. The track 105 is a flexible chain link formed by the drive wheel 103 surrounding the guide wheel 104, the support wheel 114, and the trailing wheel 117. It is mainly composed of track plates and track pins. The track plates have holes at both ends for meshing with the drive wheel and guide teeth in the middle for adjusting the track 105.

[0024] Secondly, the upper ends of the two upright plates 110 are both located below the base frame 101, the support plate 109 is located at the lower ends of the two upright plates 110, each spring element 112 is located below the support plate 109, and the two tensioning cylinders 111 are both located above the support plate 109. The drive wheel 103 is on the tracked machine 105 and is arranged in front of the frame 115. The advantage of this arrangement is that it can shorten the length of the drive section of the track 105, reduce the friction loss at the track pin caused by the driving force, extend the service life of the track 105, avoid the danger of the track 105 falling off when turning, and help improve the efficiency of the walking system. The center height of the drive wheel 103 should help to lower the center of gravity and increase the ground contact length of the track 105, and improve the adhesion performance. Therefore, the height of the drive wheel 103 should be as small as possible.

[0025] Meanwhile, each of the support rollers 114 is located on one side of the support plate 113, the anti-collision plate 118 is located on the front side of the frame 115, each of the tow rollers 117 is located on both sides of the frame 115, and the gearbox 116 is located above the frame 115. The main function of the support rollers 114 is to support the weight of the transported goods and the entire vehicle, allowing the tracks 105 to move along the wheels. The number and arrangement of the support rollers 114 should facilitate a uniform distribution of the ground pressure of the tracks 105. Agricultural walking mechanisms often operate in mountainous or hilly areas where the roads are mostly dirt roads. The track 105 device requires a small average ground pressure, and the pressure of the support rollers 114 needs to be distributed evenly. The track roller 117 is designed to support the track 105, preventing it from sagging excessively and reducing vibration during movement. It also prevents lateral slippage. Similar to the support roller 114, the track roller 117 bears a smaller load and operates under better conditions, hence its smaller size. The guide roller 104's position depends on the corresponding drive wheel 103, typically positioned at the rear. It guides the track 105 to rotate correctly, preventing deviation and derailment. The center of the guide roller 104 should be at a height that helps lower the center of gravity.

[0026] In this embodiment, the track 105 is a flexible chain link consisting of the drive wheel 103 surrounding the guide wheel 104, the support roller 114, and the trailing roller 117. It mainly consists of track plates and track pins. The track plates have holes at both ends for engagement with the drive wheel and guide teeth in the middle for alignment of the track 105. The drive wheel 103 is positioned on the tracked machine, in front of the frame 115. This arrangement has the advantages of shortening the length of the drive section of the track 105, reducing friction loss at the track pins due to driving force, extending the service life of the track 105, avoiding the risk of the track 105 falling off during turning, and improving the efficiency of the walking system. The center height of the drive wheel 103 should be designed to lower the center of gravity and increase the ground contact length of the track 105, improving adhesion. Therefore, the height of the drive wheel 103 should be as small as possible. The support roller 114 mainly supports the track. The weight of the transported goods and the entire vehicle is used to propel the track 105 along the wheels. The number and arrangement of the support rollers 114 should facilitate a uniform distribution of ground pressure on the track 105. Agricultural walking mechanisms often operate in mountainous or hilly areas where the roads are mostly dirt roads. The track 105 requires a low average ground pressure, and the pressure of the support rollers 114 must be evenly distributed. The function of the trailing roller 117 is to support the track 105, preventing it from sagging excessively, thus reducing vibration during movement and preventing lateral slippage. The trailing roller 117 is similar to the support roller 114, but it bears a smaller load and operates under better conditions, hence its smaller size. The front and rear positions of the guide rollers 104 are determined by the corresponding positions of the drive wheels 103, and they are usually located at the rear. The guide rollers 104 guide the track 105 to rotate correctly, preventing deviation and derailment.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A tracked chassis, comprising an underframe, characterized in that, It also includes a power mechanism, which comprises two drive wheels, two guide wheels, two tracks, two support components, two tensioning components, and two load-bearing components. Each load-bearing component is fixedly connected to a corresponding tensioning component and is located below the corresponding tensioning component. Each tensioning component is fixedly connected to a corresponding support component and is located below the corresponding support component. Both support components are fixedly connected to the underframe and are located below the underframe. Each track is fitted onto a corresponding load-bearing component. The two guide wheels and the two drive wheels are rotatably connected to the underframe and are located on both sides of the underframe.

2. The tracked chassis as described in claim 1, characterized in that, Each of the support components includes a support plate and two upright plates. The upper ends of the two upright plates are fixedly connected to the base frame and located below the base frame. The support plate is fixedly connected to the two upright plates and located at the lower end of the two upright plates.

3. The tracked chassis as described in claim 2, characterized in that, Each tensioning assembly includes two tensioning cylinders and multiple springs. Each spring is fixedly connected to the support plate and located below the support plate. The two tensioning cylinders are fixedly connected to the support plate and located above the support plate.

4. The tracked chassis as described in claim 3, characterized in that, Each of the support components includes a support plate and multiple support rollers. Each support roller is rotatably connected to the support plate and located on one side of the support plate. The support plate is fixedly connected to the output end of the corresponding tensioning cylinder.

5. The tracked chassis as described in claim 4, characterized in that, The base frame includes a frame body, a gearbox, multiple tow wheels, and a crash plate. The crash plate is fixedly connected to the frame body and located on the front side of the frame body. Each tow wheel is rotatably connected to the frame body and is located on both sides of the frame body. The gearbox is fixedly connected to the frame body and located above the frame body.

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