Hybrid suspension device for tracked vehicle

Abstract

The invention provides a crawler-type vehicle hybrid suspension device which comprises a balance elbow, a torsion shaft, a hydro-pneumatic spring, a damping limiter and a pull arm, the balance elbow, the torsion shaft and a vehicle body are connected into a whole, axial limiting is achieved at the same time, and the device serves as an elastic element to play a role in buffering and absorbing vibration. The hydro-pneumatic spring is used as an elastic element to buffer and absorb vibration and achieve suspension rigid locking, the balance elbow is used for connecting a loading wheel and a vehicle body, rotation is achieved through a needle bearing, axial limiting is achieved through a plurality of steel balls, and meanwhile elastic supporting and buffering force is provided for the vehicle by being connected with a torsion bar and a suspension elastic element. The damping limiter is used for limiting the travel of the loading wheel, absorbing buffering energy and assisting in improving the energy absorbing capacity of the suspension device. Under the restrictions of space, structure and the like, the device can achieve good whole vehicle suspension performance, meets the application requirement of the wide bearing range of the crawler-type vehicle, and has the advantages of being easy to engineer, high in adaptability and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of tracked vehicle suspension, and in particular relates to a hybrid suspension device for a tracked vehicle. Background Art

[0002] With the increase of attack and defense components, the suspension load-bearing capacity of tracked vehicles has gradually increased. In order to optimize the logistics support capabilities and minimize the types of chassis, the chassis load-bearing range of tracked vehicles has gradually widened, and the demand for efficient and wide-load suspension systems has become more urgent. The traditional linear suspension system (torsion shaft and shock absorber) system or a single oil-gas spring suspension system has been difficult to meet the application requirements. The use of hybrid suspension can expand the chassis load-bearing capacity to a limited extent, while taking into account the smoothness of driving after the vehicle weight increases. At the same time, the oil-gas suspension device is equipped with a damping valve, which can save the separate shock absorber in the linear suspension system. In special scenarios, the locking oil-gas spring can also realize the relevant conversion of the suspension between elastic and rigid support. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention proposes a hybrid suspension device for a tracked vehicle to solve the technical problem of how to meet the requirements of tracked vehicles for an efficient and wide load-bearing suspension device.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes a hybrid suspension device for a tracked vehicle, which comprises a balance elbow, a torsion shaft, an oil-gas spring, a damping limiter and a pull arm; wherein,

[0007] The threaded hole at one end of the torsion shaft is connected to the vehicle body through a fastener, and the other end of the torsion shaft is connected to the internal spline of the balancing elbow through a spline, and cooperates with the internal limit stop of the balancing elbow, so that the balancing elbow, the torsion shaft and the vehicle body are connected as a whole, and the axial limit is realized at the same time, and it acts as an elastic element to buffer and absorb vibration;

[0008] The inner hole of the lower fulcrum of the oil-gas spring is connected to the inner hole of the small end of the pull arm through a pin shaft, and the inner hole of the upper fulcrum of the oil-gas spring is fixedly connected to the vehicle body through a pin shaft. The oil-gas spring, as an elastic element, plays a role in buffering and absorbing vibration and realizing the rigid locking of the suspension; the inner spline of the large end of the pull arm is matched with the outer spline of the balance elbow to realize the linkage between the balance elbow and the oil-gas spring; the balance elbow is used to connect the road wheel and the vehicle body, realizes rotation through a needle bearing, realizes axial limitation through multiple steel balls, and at the same time, it is connected with the torsion bar and the suspension elastic element to provide elastic support and buffering force for the vehicle;

[0009] The outer cover of the damping limiter is fixedly connected to the vehicle body by bolts, and is used to limit the travel of the road wheels and absorb buffering energy, thereby helping to increase the energy absorption capacity of the suspension device.

[0010] Furthermore, the hybrid suspension device is composed of 6 to 7 independent suspension units.

[0011] Furthermore, the angle between the pulling arm and the balancing elbow is greater than the angle between the normal line of the center line of the piston rod of the oil and gas spring and the horizontal line.

[0012] Furthermore, the load-bearing capacity of the hybrid suspension device is 20 tons to 55 tons.

[0013] Furthermore, the static stiffness of the oil-gas spring is 0.52 times the static stiffness of the torsion shaft.

[0014] Furthermore, the dynamic stroke of the damping limiter is 0.5 times the dynamic stroke of the load-bearing wheel, and the maximum buffering force is 0.49 times the vehicle weight.

[0015] Furthermore, the safety factor of the balancing elbow is 10 to 11.5.

[0016] (III) Beneficial effects

[0017] The present invention proposes a hybrid suspension device for a crawler vehicle, including a balancing elbow, a torsion shaft, an oil-gas spring, a damping limiter and a pulling arm. The balancing elbow and the torsion shaft are connected to the vehicle body as a whole, and axial limit is achieved at the same time. As an elastic element, they play a role in buffering and absorbing vibration. The oil-gas spring plays a role in buffering and absorbing vibration as an elastic element and realizing the rigid locking of the suspension. The balancing elbow is used to connect the road wheel and the vehicle body, and realizes rotation through a needle bearing, and realizes axial limit through a plurality of steel balls. At the same time, it is connected with a torsion bar and a suspension elastic element to provide elastic support and buffering force for the vehicle. The damping limiter is used to limit the travel of the road wheel and absorb buffering energy, and assist in increasing the energy absorption capacity of the suspension device. This device can achieve good vehicle suspension performance under the constraints of space, structure, etc., meet the application requirements of a wide load range of crawler vehicles, and has the characteristics of easy engineering and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the independent suspension unit in the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0020] This embodiment provides a hybrid suspension device for a crawler vehicle, which is composed of a plurality of independent suspension units. The structure of each independent suspension unit is as follows: Figure 1As shown, it mainly includes a balancing elbow 1, a torsion shaft 2, a gas spring 3, a damping limiter 4 and a pulling arm 5.

[0021] The threaded hole at one end of the torsion shaft 2 is connected to the vehicle body through a fastener, and the other end of the torsion shaft 2 is connected to the internal spline of the balancing elbow 1 through a spline, and cooperates with the internal limit stop of the balancing elbow 1 to connect the balancing elbow 1, the torsion shaft 2 and the vehicle body into a whole, while achieving axial limitation, and acting as an elastic element to buffer and absorb vibration.

[0022] The inner hole of the lower fulcrum of the oil-gas spring 3 is connected to the inner hole of the small end of the pull arm 5 through a pin, and the inner hole of the upper fulcrum of the oil-gas spring 3 is fixedly connected to the vehicle body through a pin. The oil-gas spring 3 acts as an elastic element to buffer and absorb vibration and realize the rigid locking of the suspension. The inner spline of the large end of the pull arm 5 is matched with the outer spline of the balancing elbow 1 to realize the linkage between the balancing elbow 1 and the oil-gas spring 3. The balancing elbow 1 is used to connect the road wheel and the vehicle body, realizes rotation through a needle bearing, realizes axial limitation through multiple steel balls, and at the same time, through connection with the torsion bar and the suspension elastic element, provides elastic support and buffering force for the vehicle. The outer cover tube of the damping limiter 4 is fixedly connected to the vehicle body through bolts, which is used to limit the travel of the road wheel and absorb buffering energy, and assist in increasing the energy absorption capacity of the suspension device.

[0023] 1. The hybrid suspension device is generally composed of 6 to 7 independent suspension units.

[0024] 2. The angle between the pull arm 5 and the balance elbow 1 should be as large as possible between the normal line of the center line of the piston rod of the gas spring 3 and the horizontal line, so as to improve the suspension stiffness and dynamic potential energy.

[0025] 3. Each independent suspension unit can be matched and adjusted according to the actual situation. All balance elbows 1 are equipped with oil and gas springs 3 and torsion shafts 2 at the same time. The load of the oil and gas springs 3 can be adjusted to adapt to vehicles of different tonnages. Through reasonable design methods, a set of hybrid suspension devices can meet the requirements of 20 tons to 55 tons of load capacity.

[0026] 4. The static stiffness of the oil-gas spring 3 in the hybrid suspension device is 0.52 times the static stiffness of the torsion shaft 2; the dynamic stroke of the damping limiter 4 is 0.5 times the dynamic stroke of the load wheel, and the maximum buffer force is 0.49 times the vehicle weight; the safety factor of the balance elbow 1 is 10 to 11.5. The safety factor of the load wheel used with the independent suspension unit is generally 1.2 to 1.5.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hybrid suspension device for a tracked vehicle, characterized in that: The hybrid suspension device includes a balance elbow, a torsion shaft, an oil-gas spring, a damping limiter and a pull arm; wherein, The threaded hole at one end of the torsion shaft is connected to the vehicle body through a fastener, and the other end of the torsion shaft is connected to the internal spline of the balancing elbow through a spline, and cooperates with the internal limit stop of the balancing elbow, so that the balancing elbow, the torsion shaft and the vehicle body are connected as a whole, and the axial limit is realized at the same time, and it acts as an elastic element to buffer and absorb vibration; The inner hole of the lower fulcrum of the oil-gas spring is connected to the inner hole of the small end of the pull arm through a pin shaft, and the inner hole of the upper fulcrum of the oil-gas spring is fixedly connected to the vehicle body through a pin shaft. The oil-gas spring, as an elastic element, plays a role in buffering and absorbing vibration and realizing the rigid locking of the suspension; the inner spline of the large end of the pull arm is matched with the outer spline of the balance elbow to realize the linkage between the balance elbow and the oil-gas spring; the balance elbow is used to connect the road wheel and the vehicle body, realizes rotation through a needle bearing, realizes axial limitation through multiple steel balls, and at the same time, it is connected with the torsion bar and the suspension elastic element to provide elastic support and buffering force for the vehicle; The outer cover of the damping limiter is fixedly connected to the vehicle body by bolts and is used to limit the travel of the road wheels and absorb buffering energy, thereby helping to increase the energy absorption capacity of the suspension device.

2. The hybrid suspension device for a crawler vehicle according to claim 1, characterized in that: The hybrid suspension device is composed of 6 to 7 independent suspension units.

3. The hybrid suspension device for a crawler vehicle according to claim 1, characterized in that: The angle between the pulling arm and the balance elbow is greater than the angle between the normal line of the piston rod center line of the oil and gas spring and the horizontal line.

4. The hybrid suspension device for a crawler vehicle according to claim 1, characterized in that: The load-bearing capacity of the hybrid suspension device is 20 tons to 55 tons.

5. The hybrid suspension device for a crawler vehicle according to claim 1, characterized in that: The static stiffness of the oil-gas spring is 0.52 times the static stiffness of the torsion shaft.

6. The hybrid suspension device for a crawler vehicle according to claim 1, characterized in that: The dynamic stroke of the damping limiter is 0.5 times the dynamic stroke of the load-bearing wheel, and the maximum buffering force is 0.49 times the vehicle weight.

7. The hybrid suspension device for a crawler vehicle according to claim 1, characterized in that: The safety factor of the balancing elbow is 10 to 11.5.

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