Trailer chassis with higher stability

Abstract

The utility model relates to the field of trailers, in particular to a trailer chassis with higher stability, which comprises a traction frame, a frame, a suspension, an axle, wheels and a support leg mechanism, the traction frame is connected to the front end of the frame; the axle is connected to the lower portion of the frame through a suspension. The wheels are mounted on the axles; the left side and the right side of the frame are each provided with a plurality of supporting leg mechanisms. The supporting leg mechanism comprises a main supporting leg, an auxiliary supporting leg and a hydraulic telescopic supporting leg; one end of the main supporting leg is hinged to the frame, the other end of the main supporting leg is hinged to one end of the auxiliary supporting leg, and the hydraulic telescopic supporting leg is installed at the other end of the auxiliary supporting leg. The main supporting leg and the auxiliary supporting leg can rotate in the horizontal direction. The telescopic direction of the hydraulic telescopic supporting legs is vertical. The supporting leg mechanism is designed to be of a two-section foldable structure, the occupied space is small after the supporting leg mechanism is folded and stored, the stretching distance is long after the supporting leg mechanism is unfolded, and therefore the supporting leg mechanism can support the frame more stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to the trailer field, concretely relates to a trailer chassis with higher stability. BACKGROUND

[0002] The trailer chassis is mainly used for transporting various equipment and material by the main vehicle traction, can greatly improve the transportation efficiency, reduces the transportation cost. The existing trailer chassis is often supported by unfolding the telescopic support leg when parking, thereby enhancing the stability. The greater the unfolding range of the support leg, the stronger the stability of the support. But due to the size limitation, the size of the existing support leg cannot be very long, so the unfolding range is limited, and the support stability is poor. SUMMARY

[0003] Therefore, the utility model provides a trailer chassis with higher stability, which aims to maximize the unfolding range of the support leg, thereby enhancing the stability of the support leg when supporting.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A trailer chassis with higher stability, comprising a traction frame, a vehicle frame, a suspension, an axle, a wheel and a support leg mechanism; the traction frame is connected to the front end of the vehicle frame; the axle is connected to the lower side of the vehicle frame through the suspension; the wheel is installed on the axle; a plurality of support leg mechanisms are arranged on the left and right sides of the vehicle frame; the support leg mechanism comprises a main support leg, an auxiliary support leg and a hydraulic telescopic support leg; one end of the main support leg is hinged to the vehicle frame, the other end of the main support leg is hinged to one end of the auxiliary support leg, and the hydraulic telescopic support leg is installed on the other end of the auxiliary support leg; the main support leg and the auxiliary support leg can rotate in the horizontal direction; the telescopic direction of the hydraulic telescopic support leg is vertical.

[0006] In some optional embodiments, the suspension is a longitudinal arm independent suspension.

[0007] In some optional embodiments, the elastic element in the suspension is a torsion bar spring.

[0008] In some optional embodiments, the front end of the traction frame has a traction ring.

[0009] In some optional embodiments, it further comprises a parking wheel, an adjusting rod and a rocker; the adjusting rod is vertically screwed on the traction frame; the parking wheel is connected to the bottom of the adjusting rod; the rocker is connected to the top of the adjusting rod.

[0010] In some optional embodiments, a boarding ladder is arranged on the traction frame or the vehicle frame.

[0011] In some alternative embodiments, a parking brake system is also included, the parking brake system including a ratchet mechanism.

[0012] In summary, the utility model has the following advantages and beneficial effects compared with the prior art: the utility model discloses two folding structures for the support leg mechanism, which occupies less space when folded and has a long extension distance when unfolded, thereby providing more stable support for the vehicle frame. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The utility model discloses a structure diagram when the support leg mechanism is in a fully unfolded state.

[0014] Figure 2 The utility model discloses a front view (i.e., an elevation view) structure diagram of the structure shown. Figure 1

[0015] Figure 3 The utility model discloses a right view structure diagram of the structure shown. Figure 1

[0016] Figure 4 The utility model discloses a structure diagram when the support leg mechanism is in a fully unfolded state.

[0017] Figure 5 The utility model discloses a structure diagram when the support leg mechanism is in a fully unfolded state.

[0018] The meanings of the various reference numerals in the drawings are as follows: traction ring 11, traction frame 12, rocker 13, adjusting rod 14, parking wheel 15, ratchet mechanism 16, boarding ladder 17, vehicle frame 21, vehicle axle 22, suspension 23, vehicle wheel 24, support leg mechanism 30, main support leg 31, auxiliary support leg 32, hydraulic telescopic support leg 33. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below in conjunction with specific embodiments.

[0020] In the description of the utility model, it should be understood that, in relation to the position description, for example, the position or location relationship indicated by the upper, lower, front, rear, left, right, etc., is based on the position or location relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular position, a particular position structure and operation, and therefore cannot be understood as a limitation on the utility model.

[0021] ​​In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, while "above," "below," "within," etc. are understood to include the stated number. If terms such as "first," "second," etc., are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features, or implicitly specifying the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] like Figures 1-3 The trailer chassis with higher stability described in this application embodiment includes a drawbar 12, a frame 21, a suspension 23, an axle 22, wheels 24, and a landing gear mechanism 30. For ease of description, [the following is a simplified description]. Figure 1 The spatial rectangular coordinate system shown is used to illustrate the relevant structure of the embodiments of this application, wherein the X-axis indicates the front, the Y-axis indicates the right, and the Z-axis indicates the top.

[0024] The tow frame 12 is connected to the front end of the frame 21. The tow frame 12 can be made of steel plates bent into a U-shaped cross-section and then welded together, thereby minimizing weight while ensuring strength. In this embodiment, the tow frame 12 is used to attach to the tractor. A tow ring 11 can be connected to the front end of the tow frame 12 by welding or screwing to facilitate attachment to the tractor. The tow frame 12 bears both traction force and vertical load.

[0025] The axle 22 is connected to the underside of the frame 21 via the suspension 23, and the wheels 24 are mounted at both ends of the axle 22, i.e., one wheel 24 is mounted at each end of the axle 22.

[0026] The frame 21 has several support leg mechanisms 30 on each of its left and right sides. Here, we will use a total of four support leg mechanisms 30 as an example for explanation. Figure 4 and Figure 5As shown, two support leg mechanisms 30 are provided on the left and right sides of the frame 21, and the support leg mechanisms 30 are preferably located at the four corners of the frame 21. Each support leg mechanism 30 includes a main support leg 31, a secondary support leg 32, and a hydraulically telescopic support leg 33. One end of the main support leg 31 is hinged to the frame 21, and the other end of the main support leg 31 is hinged to one end of the secondary support leg 32. The hydraulically telescopic support leg 33 is mounted on the other end of the secondary support leg 32. Furthermore, the main support leg 31 and the secondary support leg 32 can rotate horizontally, and the extension / retraction direction of the hydraulically telescopic support leg 33 is vertical.

[0027] like Figure 1 As shown, when the outrigger mechanism 30 is not deployed, it can rotate horizontally and retract below the frame 21. At this time, the main outrigger 31 and the auxiliary outrigger 32 fold and close together to save space under the frame 21. When it is necessary to deploy the outrigger mechanism 30, firstly, as shown... Figure 4 As described above, first rotate the main support leg 31 out from under the frame 21; this is one deployment. Then, as... Figure 5 As shown, the auxiliary support leg 32 is then rotated off the main support leg 31, and both are fully extended to be in a straight line, making the auxiliary support leg 32 an extension of the main support leg 31, thus giving the support leg mechanism 30 a larger extension space. Finally, the hydraulic telescopic support leg 33 is lowered to make contact with the ground, providing stable support for the frame 21. In this embodiment, the support leg mechanism 30 is designed as a two-section foldable structure, which occupies little space when folded and has a long extension distance when unfolded, thus providing more stable support for the frame 21.

[0028] For the hydraulic telescopic outriggers 33, their corresponding hydraulic stations are fixed to the frame 21. The hydraulic lines are laid along the frame 21, the main outriggers 31, and the auxiliary outriggers 32, and secured with metal pipe clamps. Disc-shaped pads can also be installed at the lower end of the hydraulic telescopic outriggers 33 to increase the contact area with the ground. The extension stroke of each hydraulic telescopic outrigger 33 can be controlled independently to adapt to the leveling needs of the trailer chassis on different road surfaces.

[0029] To enhance the road adaptability of the entire trailer chassis, as an optional implementation, the suspension 23 in this embodiment is preferably a trailing arm independent suspension. The trailing arm independent suspension is lightweight, reducing the impact on the frame 21 and improving the driving stability of the trailer chassis. Furthermore, the trailing arm independent suspension ensures that when one wheel 24 experiences impact load and bounces during driving, it does not cause the other wheel 24 on the same axle to bounce, ensuring good adhesion between the wheels 24 and the ground and improving the overall ride smoothness of the trailer chassis. This embodiment, employing a trailing arm independent suspension, can operate on various terrains, exhibiting excellent environmental adaptability and maneuverability.

[0030] In addition, the axle 22 in the embodiment of the present application can preferably be a tubular axle, and the torsion bar spring is arranged in the axle tube, that is, the elastic element in the suspension 23 is a torsion bar spring, so that a torsion bar spring trailing arm type independent suspension is formed. The structure has the following advantages: the torsion bar spring is arranged in the axle tube, the suspension system has a compact structure and small unsprung mass, and the planar ground clearance of the vehicle frame 21 is reduced while the vehicle frame 21 has a larger allowance for the upper load. The torsion bar spring trailing arm type independent suspension has the characteristics of good shock absorption, driving stability, passability, maneuverability, transportability, reliability, maintainability, safety, and the like.

[0031] When the towing frame 12 is not connected with the towing vehicle, in order to meet the parking requirement of the trailer chassis, as an optional embodiment, as shown in Figure 1 and Figure 3 , the trailer chassis in the embodiment of the present application can further include a parking wheel 15, an adjusting rod 14, and a rocker 13. The adjusting rod 14 is vertically screwed on the towing frame 12; the parking wheel 15 is connected to the bottom of the adjusting rod 14; and the rocker 13 is connected to the top of the adjusting rod 14. The height of the parking wheel 15 can be adjusted up and down by rotating the adjusting rod 14 through the rocker 13, so that the parking wheel 15 is in contact with the ground to form a support when parking and is suspended to avoid affecting the driving safety when driving.

[0032] The parking wheel 15 and the adjusting rod 14 can be designed in a folding form, so as to separate the parking wheel 15 from the ground more quickly. After the parking wheel 15 is folded, it can be fixed under the towing frame 12 by, for example, a hook.

[0033] A boarding ladder 17 can be further arranged on the towing frame 12 or the vehicle frame 21 to facilitate personnel to get on and off. Anti-skid ribs can be punched on the tread of the boarding ladder 17 to prevent slipping when the personnel get on and off the vehicle.

[0034] The trailer chassis in the embodiment of the present application further includes a parking brake system, which can adopt a parking mechanism with a ratchet mechanism 16 as the core. The ratchet mechanism 16 has a simple structure, is convenient to operate, and is stable and reliable.

[0035] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0036] The above preferred embodiments should not be regarded as a limitation on the present application, and the protection scope of the present application should be defined by the scope defined in the claims. For ordinary skilled persons in the technical field, several improvements and refinements can be made without departing from the spirit and scope of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A trailer chassis with higher stability, characterized in that: The traction frame (12), the vehicle frame (21), the suspension (23), the axle (22), the wheel (24) and the leg mechanism (30); The traction frame (12) is connected to the front end of the vehicle frame (21); The axle (22) is connected to the lower part of the vehicle frame (21) through the suspension (23); the wheel (24) is installed on the axle (22); The left and right sides of the vehicle frame (21) are each provided with a plurality of leg mechanisms (30); the leg mechanism (30) comprises a main leg (31), a secondary leg (32) and a hydraulic telescopic leg (33); one end of the main leg (31) is hinged to the vehicle frame (21), the other end of the main leg (31) is hinged to one end of the secondary leg (32), and the hydraulic telescopic leg (33) is installed on the other end of the secondary leg (32); The main leg (31) and the secondary leg (32) can rotate in the horizontal direction; the telescopic direction of the hydraulic telescopic leg (33) is vertical.

2. The trailer chassis of claim 1, wherein: The suspension (23) is a longitudinal arm independent suspension.

3. The trailer chassis of claim 2, wherein: The elastic element in the suspension (23) is a torsion bar spring.

4. The trailer chassis of claim 1, wherein: The front end of the traction frame (12) has a traction ring (11).

5. The trailer chassis of claim 1, wherein: It also comprises a parking wheel (15), an adjusting rod (14) and a rocker (13); the adjusting rod (14) is vertically screwed on the traction frame (12); the parking wheel (15) is connected to the bottom of the adjusting rod (14); the rocker (13) is connected to the top of the adjusting rod (14).

6. The trailer chassis of claim 1, wherein: The traction frame (12) or the vehicle frame (21) is provided with a boarding ladder (17).

7. The trailer chassis of claim 1, wherein: It also comprises a parking brake system, which comprises a ratchet mechanism (16).

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