CN103144690A - Telescopic track chassis for small-sized tractor - Google Patents

Abstract

The invention discloses a telescopic crawler chassis of a small tractor, which is composed of a telescopic mechanism and a crawler running mechanism. The telescopic mechanism is composed of a hydraulic cylinder, a hydraulic cylinder bush, a side frame, a guide bush and a frame. The telescopic movement of the hydraulic cylinder drives the side frame to move, changing the distance between the side frame and the frame. At the same time, the side frame drives the stopper through the pillar The plate and the tensioning device move, and the baffle and the tensioning device respectively drive the movement of the driving wheel and the guide wheel to drive the crawler to move, so that the crawler traveling mechanism on both sides of the frame moves laterally to realize the adjustment of the track gauge. The retractable crawler chassis of the small tractor according to the invention has adjustable track gauge, compact structure, light weight, low center of gravity, convenient installation, and is suitable for various working conditions such as narrow space, flat ground, hilly and mountainous areas.

Description

A small tractor retractable crawler chassis

technical field

The invention belongs to the field of agricultural machinery and relates to a chassis structure, in particular to a retractable crawler chassis of a small tractor with adjustable track gauge.

Background technique

The distance between the crawler running mechanism and the frame of the existing small tractor crawler chassis is fixed, and the track gauge cannot be adjusted. When the track gauge is small, it works well on flat land, and its stability is stable on uneven ground such as hills and mountains. Poor passability. When the track gauge is large, the stability and passability are better on uneven ground such as hills and mountains, but it is not suitable for small and flexible working conditions such as greenhouses with small spaces. At present, small tractors equipped with crawler chassis can only be used in specific environments, and the application range is relatively narrow, so they cannot maximize their working capabilities.

Contents of the invention

In view of the above defects and deficiencies in the prior art, the object of the present invention is to provide a retractable crawler chassis of a small tractor with multi-purpose, stable working performance and adjustable track gauge.

The present invention is achieved through the following technical solutions.

A retractable track chassis of a small tractor, which is composed of a telescopic mechanism and a crawler running mechanism, and mainly includes a track, a vehicle frame, a driving wheel, a baffle, a roller, a roller bracket, a side frame, a hydraulic cylinder, and a hydraulic cylinder bushing , fixed sleeve, pillar, guide bush, guide wheel, supporting wheel, tensioning device. The telescopic mechanism is composed of a hydraulic cylinder, a hydraulic cylinder bush, a side frame, a guide bush and a frame. The telescopic movement of the hydraulic cylinder drives the lateral movement of the side frame, changing the distance between the side frame and the frame. At the same time, the side frame passes through the pillars. Drive the baffle and the tensioning device to move laterally. The baffle and the tensioning device respectively drive the lateral movement of the driving wheel and the guide wheel, and then drive the crawler to move laterally, so that the crawler traveling mechanism on both sides of the frame moves laterally to realize the track track. distance adjustment; when the hydraulic cylinder shrinks, the baffle drives the drive wheel to move inward, and a ferrule needs to be used to clamp the drive wheel at the groove of the baffle, and when the hydraulic cylinder is extended, there is no need for a ferrule to clamp the baffle plate and drive wheels.

One end of the hydraulic cylinder is fixed on the side frame, and the other end is fixed on the frame through the hydraulic cylinder bushing. The hydraulic cylinder bushing is made of shock-absorbing material, which can reduce the impact of the body vibration on the hydraulic cylinder during work. The side frame has Two guide posts perpendicular to the moving direction of the track, the guide posts have equidistant threaded holes and are guided by the guide bushes installed on the frame, which not only guide the telescopic movement of the hydraulic cylinder, but also ensure The parallelism of the telescopic direction also plays a role in transferring the weight of the vehicle body to the rollers. The guide column on the side frame and the fixed sleeve are connected by bolts, and the fixed sleeve and the frame are connected by bolts to ensure that the track is The track gauge remains unchanged. When it is necessary to adjust the track gauge, unscrew the bolts that fix the guide column and the fixing sleeve, adjust the hydraulic cylinder, adjust the track gauge to a suitable position, and then install the bolts. The guide bush is made of wear-resistant material, and the frame is welded by channel steel and angle steel. There are holes for installing the hydraulic cylinder bush and guide bush and holes for fixing the sleeve bolts on the frame. The weight is light and the structure is uniform.

The crawler traveling mechanism is composed of driving wheels, guide wheels, tensioning devices, rollers, roller brackets, supporting rollers, pillars and crawlers, placed on the left and right sides of the frame, connected by side frames and frames to realize the overall Car forward, reverse and turn. The supporting wheel bracket is connected to the upper end of the pillar, the supporting wheel is connected to the supporting wheel bracket, the supporting wheel bracket is connected to the lower end of the pillar, the side frame is connected to the lower end of the pillar, and the spline hole of the driving wheel passes through the spline shaft and the machine tool The two ends of the baffle are connected to the driving wheel and the pillar respectively, and the guide wheel is connected to the pillar through the tensioning device. The tensioning device realizes the tensioning of the track, which can buffer the impact of the uneven road on the track and extend the track. The service life of the track is installed on the outer periphery of the driving wheel, guide wheel, supporting wheel and supporting wheel.

Compared with the existing technology, the beneficial effect of the present invention is that the crawler gauge of the telescopic crawler chassis of the new small tractor can be adjusted, the structure is compact, and the weight is light. When the hydraulic cylinder is in the retracted state, the gauge becomes smaller, so that the whole machine is small in size and flexible in operation; when working in unfavorable conditions such as uneven ground or hilly mountains, the hydraulic cylinder can be adjusted to make it in the extended state. The track gauge is increased, and the passability and stability of the telescopic chassis are improved. At the same time, wider crawlers can be replaced, so that small tractors using the telescopic chassis have better adhesion and stability. The chassis well satisfies the needs of the whole vehicle when it works in different working conditions.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the front view of the retractable crawler chassis of a small tractor;

Fig. 2 is a top view of the retractable crawler chassis of a small tractor;

Fig. 3 is a kind of state that the retractable crawler chassis of a small tractor is in stretching;

In the figure: 1-track, 2-frame, 3-driving wheel, 4-baffle, 5-roller, 6-roller bracket, 7-side frame, 8-hydraulic cylinder, 9-hydraulic cylinder liner Cover, 10-fixed sleeve, 11-pillar, 12-guiding bush, 13-guiding wheel, 14-supporting wheel, 15-tensioning device.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1 and Fig. 2, a telescopic crawler chassis of a small tractor is composed of a telescoping mechanism and a crawler running mechanism, and mainly includes a crawler 1, a vehicle frame 2, a driving wheel 3, a baffle plate 4, a supporting wheel 5, and a support wheel. Heavy wheel bracket 6, side frame 7, hydraulic cylinder 8, hydraulic cylinder bushing 9, fixed sleeve 10, pillar 11, guide bushing 12, guide wheel 13, support roller 14, tensioning device 15. The telescopic mechanism is composed of a hydraulic cylinder 8, a hydraulic cylinder bush 9, a side frame 7, a guide bush 12 and a vehicle frame 2. The telescopic movement of the hydraulic cylinder 8 drives the lateral movement of the side frame 7, changing the distance between the side frame 7 and the vehicle frame 2. At the same time, the side frame 7 drives the baffle plate 4 and the tensioning device 15 to move laterally through the pillar 11, and the baffle plate 4 and the tensioning device 15 drive the crawler belt 1 to move laterally by respectively driving the driving wheel 3 and the guide wheel 13, thereby Make the crawler belt running mechanism on both sides of the vehicle frame 2 move laterally to realize the adjustment of the track gauge; Groove place is blocked, and when hydraulic oil cylinder 8 stretches out, then need not clip to block baffle plate 4 and driving wheel 3.

One end of the hydraulic cylinder 8 is fixed on the side frame 7, and the other end is fixed on the vehicle frame 2 through the hydraulic cylinder bushing 9. The hydraulic cylinder bushing 9 is made of shock-absorbing material, which can reduce the impact of the body vibration on the hydraulic cylinder 8 during work. impact, the side frame 7 has two guide columns perpendicular to the track movement direction, the guide columns have equidistant threaded holes and are guided by the guide bushing 12 installed on the frame 2, not only for the hydraulic cylinder 8 The telescopic movement plays a guiding role, ensuring the parallelism in the telescopic direction, and also plays the role of transferring the weight of the vehicle body to the roller 5. The guide column on the side frame 7 and the fixing sleeve 10 are connected by bolts, and the fixing sleeve 10 It is connected with the frame 2 by bolts to ensure that the track gauge remains unchanged during driving. When it is necessary to adjust the track gauge, unscrew the bolts fixing the guide column and the fixing sleeve 10, adjust the hydraulic cylinder 8, and adjust the track gauge Adjust to the proper position, and then install the bolts. The guide bush 12 is a wear-resistant material, and the vehicle frame 2 is welded by channel steel and angle steel. There are holes for installing the hydraulic cylinder bush 9 and the guide bush 12 and holes for fixing the sleeve bolts on the vehicle frame 2, which are light in weight and Uniform structure.

The track running mechanism is composed of driving wheel 3, guide wheel 13, tensioning device 15, supporting wheel 5, supporting wheel bracket 6, supporting wheel 14, pillar 11 and crawler belt 1, placed on the left and right sides of the vehicle frame 2, through The side frame 7 is connected with the vehicle frame 2 to realize the forward, backward and steering of the whole vehicle. The bracket of supporting wheel 14 is connected with the upper end of pillar 11, the supporting wheel 5 is connected with supporting wheel bracket 6, the supporting wheel bracket 6 is connected with the lower end of pillar 11, the side frame 7 is connected with the lower end of pillar 11, and the driving wheel 3 The spline hole is connected with the rear axle of the implement through the spline shaft, the two ends of the baffle plate 4 are respectively connected with the driving wheel 3 and the pillar 11, the guide wheel 13 is connected with the pillar 11 through the tensioning device 15, and the tensioning device 15 realizes the crawler track The tension of 1 can buffer the impact of uneven road on crawler belt 1, and prolong the life of crawler belt 1.

When adjusting the track gauge of the chassis, unscrew the fixing screw connecting the guide column and the fixing sleeve 10, adjust the hydraulic cylinder 8 in the telescopic mechanism so that the telescopic mechanism drives the crawler belt traveling mechanism on both sides of the vehicle frame 2, and the hydraulic cylinder 8 stretches to the point where it can Install the fixing screw at the proper position, and then install the fixing screw to complete the adjustment of the track gauge; Figure 2 shows the state of the track gauge of the small tractor track chassis when the track gauge is at its minimum.

Since the threaded holes on the guide posts of the side frame 6 are equally spaced, the crawler gauges corresponding to different threaded holes are different, so the stretched track gauges of the telescopic crawler chassis are multiple specific values, as shown in Figure 3 It is a state in which the crawler chassis of a small tractor is extended.

Claims (1)

1. compact tractor adjustable crawler chassis, formed by telescoping mechanism and creeper undercarriage, it is characterized in that: telescoping mechanism is by hydraulic ram (8), hydraulic ram lining (9), limit frame (7), pilot bushing (12) and vehicle frame (2) form, the fore and aft motion of hydraulic ram (8) drives limit frame (7) transverse shifting, change the distance between limit frame (7) and vehicle frame (2), limit frame (7) drives baffle plate (4) and tightening device (15) transverse shifting by pillar (11) simultaneously, baffle plate (4) and tightening device (15) drive respectively the transverse shifting of drive wheel (3) and track adjusting wheel (13), and then drive crawler belt (1) transverse shifting, thereby make the creeper undercarriage transverse shifting of vehicle frame (2) both sides, realize the adjusting of track center distance, one end of hydraulic ram (8) is fixed on limit frame (7), the other end is fixed on vehicle frame (2) by hydraulic ram lining (9), the guidepost that has two and caterpillar drive perpendicular direction on limit frame (7), this guidepost has equidistant tapped bore and leads by the pilot bushing (12) that is arranged on vehicle frame (2), guidepost on limit frame (7) is connected 10 with fixed muffle) connected by bolt, fixed muffle (10) is connected 2 with vehicle frame) connected by bolt, vehicle frame (2) is welded by channel-section steel and angle steel,

described creeper undercarriage is by drive wheel (3), track adjusting wheel (13), tightening device (15), caterpillar wheel (5), caterpillar wheel support (6), support roller (14), pillar (11) and crawler belt (1) form, be placed in the left and right sides of vehicle frame (2), be connected 2 by limit frame (7) with vehicle frame) connect, wherein, the support of support roller (14) is connected 11 with pillar) the upper end connect, caterpillar wheel (5) is connected with caterpillar wheel support (6), caterpillar wheel support (6) is connected with the lower end of pillar (11), limit frame (7) is connected 11 with pillar) the lower end connect, the splined hole of drive wheel (3) is connected back axle and is connected with facility by castellated shaft, the two ends of baffle plate (4) are connected 11 with drive wheel (3) with pillar respectively) be connected, track adjusting wheel (13) is connected 11 by tightening device (15) with pillar) connect, crawler belt (1) is arranged on drive wheel (3), track adjusting wheel (13), the periphery of caterpillar wheel (5) and support roller (14).

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