Transport vehicle
By providing dampers between the tractor and the mid-axle trailer, the damping force is provided to reduce swing, the instability and safety of the mid-axle train when driving in a straight line is solved, and higher driving stability and safety are achieved.
Patent Information
- Application Number
- CN202422320620.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-23
AI Technical Summary
When the mid-axle train is driving in a straight line, it is easy to cause swing due to accidental lateral forces, resulting in unstable driving and poor safety.
A damper is provided between the tractor and the mid-axle trailer, which provides damping force through the damper, rapidly attenuates the amplitude and swing amplitude of the mid-axle trailer.
It effectively increases the driving stability of the transport vehicle, improves driving safety, and reduces the non-periodic vibration of the mid-axle trailer.
Smart Images
Figure CN223014263U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, in particular to a transport vehicle. Background Art
[0002] In the related art, when a center axle train is traveling straight, even without the input of the steering wheel angle, under the action of an accidental lateral force, the center axle train will swing. The lateral swing of the trailer is similar to a damped "compound pendulum" in physics. At this time, any small interference will cause aperiodic vibration of the trailer, affecting the stability of the center axle train during driving and resulting in poor driving safety of the center axle train. Content of the Utility Model
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a transport vehicle that can quickly attenuate the amplitude of the center axle trailer, rapidly reduce the swing amplitude of the center axle trailer, so as to increase the stability of the transport vehicle during driving and improve the driving safety of the operating vehicle.
[0004] The transport vehicle according to an embodiment of the utility model includes: a tractor; a center axle trailer disposed behind the tractor; a damper disposed between the tractor and the center axle trailer. The damper includes a cylinder block and a piston rod. One end of the piston rod extends into the cylinder block, and the piston rod is axially movable along the cylinder block. One of the cylinder block and the piston rod is pivotally connected to the tractor, and the other of the cylinder block and the piston rod is pivotally connected to the center axle trailer.
[0005] For the transport vehicle according to an embodiment of the utility model, by providing a damper between the tractor and the center axle trailer, when the center axle trailer is forced to swing, the damper can provide a damping force to the center axle trailer, which can quickly attenuate the amplitude of the center axle trailer, rapidly reduce the swing amplitude of the center axle trailer, so as to increase the stability of the transport vehicle during driving and improve the driving safety of the operating vehicle.
[0006] According to some embodiments of the utility model, the transport vehicle further includes: two connecting seats respectively connected to the tractor and the center axle trailer, and a through hole is formed in each connecting seat; two connecting pins, and each connecting pin passes through the through hole and is pivotally connected to the cylinder block or the piston rod.
[0007] According to some embodiments of the utility model, each connecting pin includes a ball head and a connecting portion connected to each other. The ball head is pivotally connected to the cylinder block or the piston rod, and the connecting portion is fitted in the through hole; the outer diameter of the connecting portion gradually increases in the direction towards the ball head.
[0008] According to some embodiments of the present utility model, each of the connecting pins further includes a locking portion, and the locking portion is connected to a side of the connecting portion away from the ball head portion; the transport vehicle further includes: two locking members, each of the locking members is threadedly connected to the corresponding locking portion, and the locking member and the ball head portion are respectively located on two sides of the through hole.
[0009] According to some embodiments of the present utility model, each of the connecting seats includes: a body, the body is connected to the tractor or the mid - shaft trailer; an extension portion, the extension portion is provided on one side in the thickness direction of the body, the extension portion extends along the thickness direction of the body, and a through hole is formed on the extension portion; at least one reinforcing rib, two ends of the reinforcing rib are respectively connected to the body and the extension portion.
[0010] According to some embodiments of the present utility model, along the direction towards the body, the width of the extension portion gradually increases.
[0011] According to some embodiments of the present utility model, the transport vehicle further includes: two dust covers, each of the dust covers is sleeved on the outer periphery of the corresponding connecting portion, and the dust cover is located between the extension portion and the ball head portion.
[0012] According to some embodiments of the present utility model, the mid - shaft trailer includes a vehicle body and a towing bar, one end of the towing bar is connected to the vehicle body, the other end of the towing bar is pivotally connected to the tractor, and the other one of the cylinder block and the piston rod is pivotally connected to the towing bar.
[0013] According to some embodiments of the present utility model, the maximum length of the damper is m, the minimum length of the damper is n, and the stroke of the damper is k, where m, n, and k satisfy: k = m - n.
[0014] According to some embodiments of the present utility model, the damper is a hydraulic damper.
[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above - mentioned and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:
[0017] Figure 1 is a schematic diagram of a transport vehicle according to an embodiment of the present utility model;
[0018] Figure 2 isFigure 1 Partial enlarged view of the transport vehicle shown in
[0019] Figure 3 Schematic diagram of the damper and the connecting seat of the transport vehicle according to an embodiment of the present utility model;
[0020] Figure 4 is Figure 3 Partial sectional view of the damper and the connecting seat shown in
[0021] Figure 5 Schematic diagram of the position of the center axle trailer of the transport vehicle according to an embodiment of the present utility model;
[0022] Figure 6 Amplitude attenuation diagram that can be timed according to an embodiment of the present utility model.
[0023] Reference numerals:
[0024] 100: Transport vehicle;
[0025] 10: Tractor; 20: Center axle trailer; 201: Vehicle body; 202: Drawbar; 30: Damper; 301: Cylinder block; 302: Piston rod; 40: Connecting seat; 401: Body; 402: Extension; 403: Reinforcing rib; 50: Connecting pin; 501: Ball head; 502: Connecting part; 503: Locking part; 60: Locking member; 70: Dust cover. Detailed implementation manners
[0026] Next, refer to Figures 1-5 Describe the transport vehicle 100 according to an embodiment of the present utility model.
[0027] As Figures 1-5 shown, the transport vehicle 100 according to an embodiment of the present utility model includes: a tractor 10, a center axle trailer 20, and a damper 30.
[0028] Specifically, the center axle trailer 20 is arranged behind the tractor 10, the damper 30 is arranged between the tractor 10 and the center axle trailer 20, the damper 30 includes a cylinder block 301 and a piston rod 302, one end of the piston rod 302 extends into the cylinder block 301, the piston rod 302 is axially movable along the cylinder block 301, and one of the cylinder block 301 and the piston rod 302 is pivotally connected to the tractor 10, and the other of the cylinder block 301 and the piston rod 302 is pivotally connected to the center axle trailer 20.
[0029] For example, in Figures 1-4In the example, one end of the cylinder block 301 is pivotally connected to the tractor 10, and one end of the piston rod 302 is pivotally connected to the mid - shaft trailer 20. The piston rod 302 can slide axially along the cylinder block 301 to adjust the relative position between the tractor 10 and the mid - shaft trailer 20, so that while the mid - shaft trailer 20 can move with the tractor 10, the mid - shaft trailer 20 can be prevented from colliding with the tractor 10.
[0030] During the driving of the transport vehicle 100, when the mid - shaft trailer 20 is subjected to a lateral force, the mid - shaft trailer 20 will swing. According to the tire side - slip force, inertial force and inertial moment received by the mid - shaft trailer 20, the swing equation of the mid - shaft trailer 20 can be obtained: ; at this time, the mid - shaft trailer 20 only needs to receive a weak damping force to attenuate the amplitude (as shown in Figure 6 ).
[0031] According to the transport vehicle 100 of the embodiment of the present invention, by arranging a damper 30 between the tractor 10 and the mid - shaft trailer 20, when the mid - shaft trailer 20 swings under force, the damper 30 can provide a damping force to the mid - shaft trailer 20, which can quickly attenuate the amplitude of the mid - shaft trailer 20 and rapidly reduce the swing amplitude of the mid - shaft trailer 20, so as to increase the smoothness of the transport vehicle 100 during driving and improve the driving safety of the operating vehicle.
[0032] According to some embodiments of the present invention, the transport vehicle 100 further includes two connecting seats 40 and two connecting pins 50. The two connecting seats 40 are respectively connected to the tractor 10 and the mid - shaft trailer 20. A through - hole is formed on each connecting seat 40, and each connecting pin 50 passes through the through - hole and is pivotally connected to the cylinder block 301 or the piston rod 302. As shown in Figure 1 and Figure 3 , the cylinder block 301 and the piston rod 302 are pivotally connected to the tractor 10 and the mid - shaft trailer 20 respectively through two connecting pins 50. Among them, the shape of the connecting seat 40 is generally conical, and four mounting holes are formed on the bottom of the connecting seat 40. The four mounting holes are respectively located at the corners of the bottom of the connecting seat 40. Fasteners such as bolts pass through the mounting holes and are fixedly connected to the mid - shaft trailer 20 or the tractor 10. A through - hole is formed on the top of the connecting seat 40, and the connecting pin 50 passes through the through - hole and is connected to the cylinder block 301 or the piston rod 302. Thus, through the cooperation of the connecting seat 40 and the connecting pin 50, the pivotal connection of the damper 30 with the mid - shaft trailer 20 and the tractor 10 is realized, and the connection method is simple and easy to operate.
[0033] Further, referring to Figure 4, each connecting pin 50 includes a ball head portion 501 and a connecting portion 502 connected to each other. The ball head portion 501 is pivotally connected to the cylinder block 301 or the piston rod 302, and the connecting portion 502 is fitted in the through hole. With such a setting, the connecting pin 50 can adapt to complex working conditions such as yaw and torsion of the transport vehicle 100.
[0034] Along the direction towards the ball head portion 501, the outer diameter of the connecting portion 502 gradually increases. That is to say, the shape of the connecting portion 502 is generally frustum-shaped, the cross-sectional area of the end of the connecting portion 502 adjacent to the ball head portion 501 is larger, and the cross-sectional area of the end of the connecting portion 502 far from the ball head portion 501 is smaller. The connecting portion 502 is in interference fit with the through hole. Thereby, when the mid-axle trailer 20 swings, the damping of the damper 30 can be smoothly transmitted to the mid-axle trailer 20, ensuring that the transport vehicle 100 can run smoothly.
[0035] Optionally, the taper of the connecting portion 502 can be 1:20. However, it is not limited thereto.
[0036] Furthermore, each connecting pin 50 further includes a locking portion 503, and the locking portion 503 is connected to the side of the connecting portion 502 far from the ball head portion 501. The transport vehicle 100 further includes two locking members 60, each locking member 60 is threadedly connected to the corresponding locking portion 503, and the locking member 60 and the ball head portion 501 are respectively located on both sides of the through hole. As Figure 4 shown, the outer diameter of the locking portion 503 is smaller than the aperture of the through hole, the outer diameter of the ball head portion 501 is larger than the outer diameter of the through hole, one of the locking member 60 and the locking portion 503 is provided with internal threads, and the other of the locking member 60 and the locking portion 503 is provided with external threads. During installation, the locking portion 503 can penetrate from the bottom of the through hole and pass through the top of the through hole, and then the locking member 60 is tightened on the locking portion 503, and between the locking member 60 and the connecting seat 40. Thereby, the connecting pin 50 can be firmly fixed on the connecting seat 40 to prevent the connecting pin 50 from moving.
[0037] Optionally, the locking member 60 can be a nut, but it is not limited thereto.
[0038] According to some specific embodiments of the present invention, each connecting seat 40 includes a body 401, an extension portion 402 and at least one reinforcing rib 403. The body 401 is connected to the tractor 10 or the mid-axle trailer 20, the extension portion 402 is provided on one side in the thickness direction of the body 401, the extension portion 402 extends along the thickness direction of the body 401, and a through hole is formed in the extension portion 402. The two ends of the reinforcing rib 403 are respectively connected to the body 401 and the extension portion 402. As Figure 3As shown. The shape of the main body 401 is generally square, and the extension part 402 is connected to the middle of the main body 401. Among them, along the direction towards the main body 401, the width of the extension part 402 gradually increases. That is to say, the shape of the extension part 402 is generally triangular, the end with a larger cross-sectional area of the extension part 402 is connected to the main body 401, a through hole is formed at the end with a smaller cross-sectional area of the extension part 402, and the through hole penetrates the extension part 402 along the thickness direction of the extension part 402. There are two reinforcing ribs 403, and the two reinforcing ribs 403 are respectively arranged on both sides in the thickness direction of the extension part 402, and the shape of the reinforcing rib 403 is a right triangle. Thus, while ensuring the structural strength of the connecting seat 40, the weight of the connecting seat 40 can be reduced, and the weight of the transport vehicle 100 can be reduced.
[0039] According to some embodiments of the present invention, the transport vehicle 100 further includes two dust covers 70, each dust cover 70 is sleeved on the outer periphery of the corresponding connecting part 502, and the dust cover 70 is located between the extension part 402 and the ball head part 501. As Figure 4 shown, the dust cover and the locking member 60 are respectively located on both sides in the thickness direction of the extension part 402. Since the ball head part 501 of the connecting pin 50 is adjacent to the ground, during the driving of the transport vehicle 100, impurities such as gravel and soil blocks are likely to enter the through hole. By arranging the dust cover between the extension part 402 and the ball head part 501, it can block the impurities and prevent the impurities from entering the through hole.
[0040] According to some embodiments of the present invention, as Figure 1 shown, the mid - axle trailer 20 includes a vehicle body 201 and a towing bar 202. One end of the towing bar 202 is connected to the vehicle body 201, the other end of the towing bar 202 is pivotally connected to the tractor 10, and the other one of the cylinder block 301 and the piston rod 302 is pivotally connected to the towing bar 202. With such an arrangement, the distance between the vehicle body 201 and the tractor 10 can be increased through the towing bar 202, and it can be avoided that the vehicle body 201 collides with the tractor 10 due to inertia when the tractor 10 makes an emergency stop.
[0041] According to some embodiments of the present invention, as Figure 2 shown, the maximum length of the damper 30 is m, the minimum length of the mid - axle trailer 20 is n, and the stroke of the mid - axle trailer 20 is k, where m, n, and k satisfy: k = m - n.
[0042] Referring to Figure 5 , taking the left - turn of the mid - axle trailer 20 as an example, Figure 5Among them, O1 is the instantaneous steering center point of the minimum turning diameter of the tractor 10, and O2 is the coupling point of the mid - axle trailer 20 and the tractor 10 (without the damper 30). For the mid - axle trailer 20, the connecting line between the central axis of its rear axle and the steering center O1 is perpendicular to the longitudinal axis of the mid - axle trailer 20 (the circumferential angle is always a right angle). Specifically, connect the coupling point O2 of the mid - axle trailer 20 and the instantaneous steering center O1, and draw a circle O4 with it as the diameter. Then, with the coupling point O2 as the center and the wheelbase of the mid - axle trailer 20 as the radius, draw an arc. The intersection point of the above - mentioned arc and the circle O4 is O3, and O3 is the center of the rear axle of the mid - axle trailer 20, and thus the position of the mid - axle trailer 20 at the maximum turning angle can be determined.
[0043] Thus, the maximum length of the damper 30 can be determined according to the position of the mid - axle trailer 20 at the maximum turning angle, that is, the total length of the damper 30 when the piston rod 302 extends out of the cylinder body 301 by the maximum stroke, so as to ensure that the transport vehicle 100 can turn smoothly.
[0044] In some alternative embodiments, the damper 30 is a hydraulic damper. It should be noted that the size of the damping holes of the hydraulic damper can be adjusted to obtain different damping forces, or different dampers can be matched according to the tonnage of the operating vehicle 100.
[0045] The other components and operations of the transport vehicle 100 according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.
[0046] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.
[0047] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present application can be understood according to specific situations.
[0048] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.
[0049] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.
Claims
1. A transport vehicle, characterized in that: include: Tractor; A mid-axle trailer, which is arranged behind the tractor; A damper, the damper is arranged between the tractor and the mid-axle trailer, the damper includes a cylinder body and a piston rod, one end of the piston rod extends into the cylinder body, the piston rod is movable along the axial direction of the cylinder body, one of the cylinder body and the piston rod is pivotally connected to the tractor, and the other of the cylinder body and the piston rod is pivotally connected to the mid-axle trailer.
2. The transport vehicle according to claim 1, characterized in that: Also includes: Two connecting seats, the two connecting seats are respectively connected to the tractor and the mid-axle trailer, and each of the connecting seats is formed with a through hole; Two connecting pins, each of which passes through the through hole and is pivotally connected to the cylinder body or the piston rod.
3. The transport vehicle according to claim 2, characterized in that: Each of the connecting pins comprises a ball head and a connecting portion connected to each other, the ball head is pivotally connected to the cylinder body or the piston rod, and the connecting portion is fitted in the through hole; The outer diameter of the connecting portion gradually increases in a direction toward the ball head.
4. The transport vehicle according to claim 3, characterized in that: Each of the connecting pins further comprises a locking portion, wherein the locking portion is connected to a side of the connecting portion away from the ball head; The transport vehicle also includes: Two locking pieces, each of which is threadedly connected to the corresponding locking portion, and the locking piece and the ball head are respectively located on two sides of the through hole.
5. The transport vehicle according to claim 3, characterized in that: Each of the connecting sockets comprises: A body, the body being connected to the tractor or the mid-axle trailer; An extension portion, the extension portion is arranged on one side of the body in the thickness direction, the extension portion extends along the thickness direction of the body, and the through hole is formed on the extension portion; At least one reinforcing rib, two ends of which are respectively connected to the main body and the extension portion.
6. The transport vehicle according to claim 5, characterized in that: The width of the extension portion gradually increases along a direction toward the main body.
7. The transport vehicle according to claim 5, characterized in that: Also includes: Two dust-proof sleeves, each of which is arranged on the outer periphery of the corresponding connecting portion, and the dust-proof sleeve is located between the extending portion and the ball head.
8. The transport vehicle according to any one of claims 1 to 7, characterized in that: The mid-axle trailer comprises a vehicle body and a drawbar, one end of the drawbar is connected to the vehicle body, the other end of the drawbar is pivotally connected to the tractor, and the other of the cylinder body and the piston rod is pivotally connected to the drawbar.
9. The transport vehicle according to any one of claims 1 to 7, characterized in that: The maximum length of the damper is m, the minimum length of the central axle trailer is n, and the stroke of the central axle trailer is k, wherein m, n and k satisfy: k=mn.
10. The transport vehicle according to any one of claims 1 to 7, characterized in that: The damper is a hydraulic damper.