Trailer with an Adaptive Drawbar

Abstract

The present invention discloses a trailer with an adaptive towing arm, which includes a towing arm, a vehicle frame, a bogie, a front wheel assembly, a rear wheel assembly and a pulling member. The front wheel assembly and the rear wheel assembly are arranged below the vehicle frame. The rear wheel assembly is fixedly connected to the vehicle frame. A bogie is arranged between the front wheel assembly and the vehicle frame. The bogie is fixedly connected to the front wheel assembly, and the bogie is rotatably connected to the vehicle frame left and right. The front end of the bogie is rotatably connected to the rear end of the towing arm up and down; the towing arm includes a towing ring pin, a triangular frame and a buffer member. The towing ring pin is slidably connected to the front end of the triangular frame back and forth. The buffer member is arranged between the towing ring pin and the triangular frame, and the buffer member is used to provide a buffer force back and forth; the pulling member is used to prevent the towing ring pin from touching the ground, and both ends of the pulling member are respectively connected to the towing arm and the bogie. The present invention can be applicable to chassis tail hooks of different heights, can be lifted up and down, solves the problem of intense collision and severe wear between the towing ring and the chassis tail hook, and has a strong load-bearing capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of trailers. More specifically, the present invention relates to a trailer with an adaptive towing arm. Background Art

[0002] Trailers are important tools for towing. In actual use, current trailers have the following defects:

[0003] (1) Current trailers are only adapted to the height of a certain chassis tail hook and cannot adapt to chassis tail hooks of different heights, which has limitations.

[0004] (2) When the towing ring of the trailer is towed with the chassis tail hook, it is relatively heavy to lift.

[0005] (3) When braking suddenly or starting with acceleration, the towing ring collides violently with the chassis tail hook and wears severely.

[0006] (4) The towing arm is of a single-arm structure and has weak load-bearing capacity.

[0007] Therefore, a trailer that can overcome the above defects is needed. Summary of the Invention

[0008] To solve the problems of existing trailers that can only adapt to the height of a single chassis tail hook, are relatively heavy to lift during towing, have violent collisions and severe wear between the towing ring and the chassis tail hook when braking suddenly or starting with acceleration, and have weak load-bearing capacity, etc., the present invention innovatively provides a trailer with an adaptive towing arm, which can adapt to chassis tail hooks of different heights, can be lifted up and down, is provided with a buffer member to solve the problem of violent collisions and severe wear between the towing ring and the chassis tail hook, and the towing arm has strong load-bearing capacity.

[0009] To achieve the above technical objectives, the present invention discloses a trailer with an adaptive towing arm, including a towing arm, a frame, a bogie, a front wheel assembly, a rear wheel assembly, and a pulling member.

[0010] The front wheel assembly and the rear wheel assembly are arranged below the frame. The front wheel assembly is located in front of the rear wheel assembly. The rear wheel assembly is fixedly connected to the frame. A bogie is arranged between the front wheel assembly and the frame. The bogie is fixedly connected to the front wheel assembly. The bogie is rotatably connected to the frame left and right. The front end of the bogie is rotatably connected to the rear end of the towing arm up and down.

[0011] The towing arm includes a towing ring pin, a triangular frame, and a buffer member. The towing ring pin is slidably connected to the front end of the triangular frame back and forth. The buffer member is arranged between the towing ring pin and the triangular frame. The buffer member is used to provide a buffer force back and forth.

[0012] The pulling member is used to prevent the towing ring pin from touching the ground. One end of the pulling member is connected to the towing arm, and the other end of the pulling member is connected to the bogie.

[0013] Further, the triangular frame includes a left inclined beam, a right inclined beam, a front limiting plate, a rear limiting plate, and a cross beam. Both ends of the front limiting plate, both ends of the rear limiting plate, and both ends of the cross beam are fixedly connected to the left inclined beam and the right inclined beam respectively. The front limiting plate, the rear limiting plate, and the cross beam are arranged in sequence from front to back between the left inclined beam and the right inclined beam. A front limiting hole is provided on the front limiting plate, and a rear limiting hole is provided on the rear limiting plate.

[0014] The buffer member includes a front guide sleeve, a rear guide sleeve, and a buffer spring. The front guide sleeve extends into the front limiting hole. A front outer flange is provided on the end of the front guide sleeve located between the front limiting plate and the rear limiting plate. The rear guide sleeve extends into the rear limiting hole. A rear outer flange is provided on the end of the rear guide sleeve located between the front limiting plate and the rear limiting plate. The towing ring pin passes through the front guide sleeve and the rear guide sleeve. The buffer spring is sleeved on the towing ring pin. Both ends of the buffer spring respectively abut against the front outer flange and the rear outer flange. A locking nut is connected to the tail of the towing ring pin located at the rear end of the rear limiting plate.

[0015] Further, a left longitudinal beam is connected to the rear end of the left inclined beam, and a right longitudinal beam is connected to the rear end of the right inclined beam.

[0016] Further, at least one cross beam is connected between the left longitudinal beam and the right longitudinal beam.

[0017] Further, the pulling member includes a left pulling spring, a right pulling spring, a left towing arm ear seat, a right towing arm ear seat, a left bogie ear seat, and a right bogie ear seat. The left towing arm ear seat is fixed on the left side of the towing arm, the right towing arm ear seat is fixed on the right side of the towing arm, the left bogie ear seat is fixed on the left side of the bogie, and the right bogie ear seat is fixed on the right side of the bogie. Both ends of the left pulling spring are respectively connected to the left towing arm ear seat and the left bogie ear seat, and both ends of the right pulling spring are respectively connected to the right towing arm ear seat and the right bogie ear seat.

[0018] Further, the towing arm further includes a reinforcing plate, and the reinforcing plate is fixedly connected to the rear limiting plate, the left inclined beam, and the right inclined beam respectively.

[0019] Further, the bogie is rotatably connected to the vehicle frame through a steering bearing, and the axis of the steering bearing is perpendicular to the bogie and the vehicle frame.

[0020] Further, bushings are fixed to the rear ends of both the left and right sides of the towing arm, pin shafts are fixed to both the left and right sides of the bogie, and nuts are connected after the pin shafts pass through the bushings.

[0021] The beneficial effects of the present invention are as follows:

[0022] The trailer with an adaptable towing arm of the present invention can adapt to chassis tail hooks of different heights by the up-and-down rotation of the towing arm; it has a simple structure, can be lifted up and down, and the towing arm has a strong load-bearing capacity; the buffer is provided to solve the problem of intense collision and wear between the towing ring and the chassis tail hook, saving costs and extending the service life of the trailer. Description of the Drawings

[0023] Figure 1 is a schematic side view structure diagram of the trailer with an adaptable towing arm according to an embodiment of the present invention;

[0024] Figure 2 is a schematic top view structure diagram of the trailer with an adaptable towing arm according to an embodiment of the present invention;

[0025] Figure 3 is a schematic top view structure diagram of the towing arm according to an embodiment of the present invention;

[0026] Figure 4 is a schematic side view structure diagram of the towing arm according to an embodiment of the present invention.

[0027] In the figures,

[0028] 1. Towing arm; 11. Towing ring pin; 12. Triangular frame; 121. Left inclined beam; 122. Right inclined beam; 123. Front limit plate; 124. Rear limit plate; 125. Cross beam; 126. Left longitudinal beam; 127. Right longitudinal beam; 13. Buffer; 131. Front guide sleeve; 132. Rear guide sleeve; 133. Buffer spring; 134. Front outer flange; 135. Rear outer flange; 14. Locking nut; 15. Reinforcing plate; 2. Frame; 3. Bogie; 4. Front wheel assembly; 5. Rear wheel assembly; 6. Tension member; 61. Left tension spring; 62. Right tension spring; 63. Left towing arm ear seat; 64. Right towing arm ear seat; 65. Left bogie ear seat; 66. Right bogie ear seat; 7. Steering bearing; 8. Bushing; 9. Pin shaft. Detailed Embodiments

[0029] The trailer with an adaptable towing arm provided by the present invention will be explained and described in detail below with reference to the accompanying drawings of the specification.

[0030] As Figure 1 and 2As shown in the figure, this embodiment specifically discloses a trailer with an adaptive towing arm, which includes a towing arm 1, a vehicle frame 2, a bogie 3, a front wheel assembly 4, a rear wheel assembly 5, and a towing member 6. The front wheel assembly 4 and the rear wheel assembly 5 are arranged below the vehicle frame 2. The front wheel assembly 4 is located in front of the rear wheel assembly 5. The rear wheel assembly 5 is fixedly connected to the vehicle frame 2. A bogie 3 is arranged between the front wheel assembly 4 and the vehicle frame 2. The bogie 3 is fixedly connected to the front wheel assembly 4. The bogie 3 is rotatably connected to the vehicle frame 2 left and right. The bogie 3 rotates left and right relative to the vehicle frame 2, thereby realizing the left and right steering of the trailer. As Figure 1 shown, the bogie 3 is rotatably connected to the vehicle frame 2 through a steering bearing 7. The axis of the steering bearing 7 is perpendicular to the bogie 3 and the vehicle frame 2. The bogie 3 is fixedly connected to one of the inner ring and the outer ring of the steering bearing 7, and the vehicle frame 2 is fixedly connected to the other of the inner ring and the outer ring of the steering bearing 7, so that the bogie 3 can rotate left and right relative to the vehicle frame 2. During the running of the trailer, the wheels of the front wheel assembly 4 and the rear wheels of the rear wheel assembly 5 roll, enabling the trailer to move forward. Figure 1 The direction of the arrow in the figure is the forward direction. The left and right steering of the trailer is realized by the left and right rotation of the bogie 3.

[0031] The front end of the bogie 3 is rotatably connected to the rear end of the towing arm 1 up and down, enabling the front end of the towing arm 1 to be lifted up and down, adapting to the chassis tail hooks of different heights, and being relatively labor-saving when lifting.

[0032] As Figure 3 shown, the towing arm 1 includes a towing ring pin 11, a triangular frame 12, and a buffer member 13. The triangular frame 12 is light in weight and stable in structure, improving the load-bearing capacity of the towing arm 1. The towing ring pin 11 is slidably connected to the front end of the triangular frame 12 back and forth. The buffer member 13 is arranged between the towing ring pin 11 and the triangular frame 12. The buffer member 13 is used to provide a buffer force in the front and rear directions. When braking suddenly or starting with acceleration, the buffer member 13 provides buffering to avoid intense collision and wear between the towing arm 1 and the chassis tail hook.

[0033] The towing member 6 is used to prevent the towing ring pin 11 from touching the ground. One end of the towing member 6 is connected to the towing arm 1, and the other end of the towing member 6 is connected to the bogie 3, avoiding the towing ring pin 11 touching the ground when the towing arm 1 is lifted up and down.

[0034] As Figure 3As shown, the triangular frame 12 includes a left inclined beam 121, a right inclined beam 122, a front limit plate 123, a rear limit plate 124, and a cross beam 125. There is a certain angle between the left inclined beam 121 and the right inclined beam 122. The two ends of the front limit plate 123, the two ends of the rear limit plate 124, and the two ends of the cross beam 125 are respectively fixedly connected to the left inclined beam 121 and the right inclined beam 122. The front limit plate 123, the rear limit plate 124, and the cross beam 125 are arranged in sequence from front to back between the left inclined beam 121 and the right inclined beam 122. The front limit plate 123 is provided with a front limit hole, and the rear limit plate 124 is provided with a rear limit hole. The buffer member 13 includes a front guide sleeve 131, a rear guide sleeve 132, and a buffer spring 133. As Figure 4 shown, the front guide sleeve 131 extends into the front limit hole. The front guide sleeve 131 is provided with a front outer flange 134 at the end between the front limit plate 123 and the rear limit plate 124. The outer diameter of the front outer flange 134 is greater than the diameter of the front limit hole, and the front outer flange 134 blocks behind the front limit plate 123; the rear guide sleeve 132 extends into the rear limit hole. The rear guide sleeve 132 is provided with a rear outer flange 135 at the end between the front limit plate 123 and the rear limit plate 124. The outer diameter of the rear outer flange 135 is greater than the diameter of the rear limit hole, and the rear outer flange 135 blocks in front of the rear limit plate 124; the traction ring pin 11 passes through the front guide sleeve 131 and the rear guide sleeve 132. The buffer spring 133 is sleeved on the traction ring pin 11. The two ends of the buffer spring 133 respectively abut against the front outer flange 134 and the rear outer flange 135. A locking nut 14 is connected to the tail of the traction ring pin 11 at the rear end of the rear limit plate 124. The outer diameter of the locking nut 14 is greater than the diameter of the rear limit hole of the rear limit plate 124. The front guide sleeve 131 can slide relative to the rod of the traction ring pin, and the front guide sleeve can slide relative to the front limit plate; the rear guide sleeve can slide relative to the rod of the traction ring pin, and the rear guide sleeve can slide relative to the rear limit plate. When the tractor in front of the traction ring pin 11 starts or accelerates, the traction ring pin 11 will generate a forward speed. The traction ring pin drives the locking nut 14 to apply a forward extrusion force to the rear guide sleeve 132 and the rear limit plate 124. At this time, the buffer spring 133 is compressed to generate a reverse buffer force, offsetting part of the force applied by the locking nut 14 to the rear limit plate 124, so that the triangular frame 12 and the vehicle frame 2 start or accelerate slowly, and will not cause a large impact force due to sudden acceleration and collision. When the speed of the tractor is stable, the buffer spring 133 returns to its original state. When the tractor in front of the traction ring pin 11 decelerates or brakes, the traction ring pin 11 squeezes the buffer spring 133 backward through the front guide sleeve 131. The triangular frame and the vehicle frame still have a forward speed due to inertia. The rear limit plate 124 applies a forward extrusion force to the rear guide sleeve 132, and the buffer spring is compressed to generate a buffer force, so that the triangular frame and the vehicle frame decelerate or stop slowly, avoiding a violent collision with the chassis tail hook and reducing wear.

[0035] In some embodiments, as Figure 3As shown, the rear end of the left inclined beam 121 is connected to the left longitudinal beam 126, and the rear end of the right inclined beam 122 is connected to the right longitudinal beam 127. The left and right longitudinal beams increase the length of the towing arm, facilitating the steering of the trailer. At least one cross beam 125 is connected between the left longitudinal beam 126 and the right longitudinal beam 127, increasing the load-bearing capacity of the towing arm 1.

[0036] As Figure 3 shown, the towing arm 1 further includes a reinforcing plate 15, and the reinforcing plate 15 is fixedly connected to the rear limiting plate 124, the left inclined beam 121, and the right inclined beam 122 respectively. The reinforcing plate 15 enhances the load-bearing capacity of the towing arm 1.

[0037] As Figure 1 and 2 shown, the pulling member 6 includes a left pulling spring 61, a right pulling spring 62, a left towing arm ear seat 63, a right towing arm ear seat 64, a left bogie ear seat 65, and a right bogie ear seat 66. The left towing arm ear seat 63 is fixed on the left side of the towing arm 1, specifically fixed on the left longitudinal beam. The right towing arm ear seat 64 is fixed on the right side of the towing arm 1, specifically fixed on the right longitudinal beam. The left bogie ear seat 65 is fixed on the left side of the bogie 3, and the right bogie ear seat 66 is fixed on the right side of the bogie 3. The two ends of the left pulling spring 61 are respectively connected to the left towing arm ear seat 63 and the left bogie ear seat 65, and the two ends of the right pulling spring 62 are respectively connected to the right towing arm ear seat 64 and the right bogie ear seat 66. Pulling springs are provided on both the left and right sides to provide symmetrical pulling forces. When the towing arm 1 moves downward, both the left pulling spring 61 and the right pulling spring 62 provide reverse pulling forces, preventing the towing ring pin 11 from contacting the ground.

[0038] Bushings 8 are fixedly provided at the rear ends of both the left and right sides of the towing arm 1, and pin shafts 9 are fixedly provided at both the left and right sides of the bogie 3. After the pin shafts 9 pass through the bushings 8, nuts are connected. In this embodiment, the bushings 8 are fixed at the rear ends of the left longitudinal beam 126 and the right longitudinal beam 127. The ends of the pin shafts 9 are provided with external threads matching the nuts. The pin shafts 9 on both the left and right sides of the bogie 3 respectively pass through the corresponding bushings 8 and are locked by nuts. The towing arm 1 realizes up and down lifting by rotating around the pin shafts 9, solving the problem that the towing ring is heavy to lift when towing with the chassis tail hook.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention.

[0040] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the description of this specification, the descriptions referring to the terms "this embodiment", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any at least one embodiment or example. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and simple improvements made to the substantial content of the present invention shall be included in the protection scope of the present invention.

Claims

1. A trailer with an adaptive towing arm, Characterized in that, it includes a towing arm (1), a vehicle frame (2), a bogie (3), a front wheel assembly (4), a rear wheel assembly (5) and a pulling member (6), the front wheel assembly (4) and the rear wheel assembly (5) are arranged below the vehicle frame (2), the front wheel assembly (4) is located in front of the rear wheel assembly (5), the rear wheel assembly (5) is fixedly connected to the vehicle frame (2), a bogie (3) is arranged between the front wheel assembly (4) and the vehicle frame (2), the bogie (3) is fixedly connected to the front wheel assembly (4), the bogie (3) is rotatably connected to the vehicle frame (2) left and right, and the front end of the bogie (3) is rotatably connected to the rear end of the towing arm (1) up and down; the towing arm (1) includes a towing ring pin (11), a triangular frame (12) and a buffer member (13), the towing ring pin (11) is slidably connected to the front end of the triangular frame (12) back and forth, the buffer member (13) is arranged between the towing ring pin (11) and the triangular frame (12), and the buffer member (13) is used to provide a buffer force back and forth; the triangular frame (12) includes a left inclined beam (121), a right inclined beam (122), a front limiting plate (123), a rear limiting plate (124) and a cross beam (125), both ends of the front limiting plate (123), both ends of the rear limiting plate (124) and both ends of the cross beam (125) are fixedly connected to the left inclined beam (121) and the right inclined beam (122) respectively, the front limiting plate (123), the rear limiting plate (124) and the cross beam (125) are arranged in sequence from front to back between the left inclined beam (121) and the right inclined beam (122), a front limiting hole is provided on the front limiting plate (123), and a rear limiting hole is provided on the rear limiting plate (124), The buffer member (13) includes a front guide sleeve (131), a rear guide sleeve (132), and a buffer spring (133). The front guide sleeve (131) extends into the front limit hole. A front outer flange (134) is provided at the end of the front guide sleeve (131) between the front limit plate (123) and the rear limit plate (124). The rear guide sleeve (132) extends into the rear limit hole. A rear outer flange (135) is provided at the end of the rear guide sleeve (132) between the front limit plate (123) and the rear limit plate (124). The towing ring pin (11) passes through the front guide sleeve (131) and the rear guide sleeve (132). The buffer spring (133) is sleeved on the towing ring pin (11). Both ends of the buffer spring (133) respectively abut against the front outer flange (134) and the rear outer flange (135). A locking nut (14) is connected to the tail of the towing ring pin (11) at the rear end of the rear limit plate (124). The outer diameter of the front outer flange (134) is greater than the diameter of the front limit hole. The front outer flange (134) blocks behind the front limit plate (123). The outer diameter of the rear outer flange (135) is greater than the diameter of the rear limit hole. The rear outer flange (135) blocks in front of the rear limit plate (124). The outer diameter of the locking nut (14) is greater than the diameter of the rear limit hole of the rear limit plate (124). The rod of the front guide sleeve (131) and the towing ring pin can slide relative to each other. The front guide sleeve and the front limit plate can slide relative to each other. The rod of the rear guide sleeve and the towing ring pin can slide relative to each other. The rear guide sleeve and the rear limit plate can slide relative to each other; The pulling member (6) is used to prevent the towing ring pin (11) from touching the ground. One end of the pulling member (6) is connected to the towing arm (1), and the other end of the pulling member (6) is connected to the bogie (3); The pulling member (6) includes a left pulling spring (61), a right pulling spring (62), a left towing arm ear seat (63), a right towing arm ear seat (64), a left bogie ear seat (65), and a right bogie ear seat (66). The left towing arm ear seat (63) is fixed on the left side of the towing arm (1). The right towing arm ear seat (64) is fixed on the right side of the towing arm (1). The left bogie ear seat (65) is fixed on the left side of the bogie (3). The right bogie ear seat (66) is fixed on the right side of the bogie (3). Both ends of the left pulling spring (61) are respectively connected to the left towing arm ear seat (63) and the left bogie ear seat (65). Both ends of the right pulling spring (62) are respectively connected to the right towing arm ear seat (64) and the right bogie ear seat (66).

2. The trailer with an adaptive towing arm according to claim 1, characterized in that, A left longitudinal beam (126) is connected to the rear end of the left inclined beam (121), and a right longitudinal beam (127) is connected to the rear end of the right inclined beam (122).

3. The trailer with an adaptive towing arm according to claim 2, characterized in that, At least one cross beam (125) is connected between the left longitudinal beam (126) and the right longitudinal beam (127).

4. The trailer with an adaptive towing arm according to any one of claims 1-3, characterized in that the towing arm (1) further includes a reinforcing plate (15), and the reinforcing plate (15) is fixedly connected to the rear limit plate (124), the left inclined beam (121) and the right inclined beam (122) respectively.

5. The trailer with an adaptive towing arm according to claim 1, characterized in that the bogie (3) is rotatably connected to the vehicle frame (2) through a steering bearing (7), and the axis of the steering bearing (7) is perpendicular to the bogie (3) and the vehicle frame (2).

6. The trailer with an adaptive towing arm according to any one of claims 1-3, characterized in that bushings (8) are fixed to the rear ends of both the left and right sides of the towing arm (1), pin shafts (9) are fixed to both the left and right sides of the bogie (3), and nuts are connected after the pin shafts (9) pass through the bushings (8).

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