Draw bar

Abstract

The utility model discloses a traction rod, which relates to the technical field of traction devices and comprises a driving arm, first adjusting discs are arranged on two sides of the end portion of the driving arm, first adjusting teeth are arranged on the circumferences of the first adjusting discs, the first adjusting discs are meshed with a second adjusting disc through the first adjusting teeth, and an adjusting arm is arranged on one side of the second adjusting disc. A first connecting bolt penetrates through the adjusting arm in the circle center positions of the first adjusting disc and the second adjusting disc; a third adjusting disc is arranged at the other end of the adjusting arm, a plurality of third adjusting teeth are arranged on the third adjusting disc, the third adjusting disc is meshed with a fourth adjusting disc through the third adjusting teeth, and a second connecting bolt is arranged at the position, located at the circle center of the third adjusting disc and the fourth adjusting disc, of the adjusting arm in a penetrating mode; according to the utility model, the adjustment of the angle and the height is realized through the rotation of the adjusting arm around the first adjusting disc, so that a towed vehicle can reach a horizontal state, and objects are prevented from slipping off.

Description

Technical Field

[0001] The utility model relates to the technical field of traction devices, in particular to a drawbar. Background Art

[0002] The drawbar realizes the rigid connection between the tractor and the towed vehicle, and is convenient to use, safe and reliable.

[0003] The existing invention patent with the publication number CN 118107325 A and the publication date of May 31, 2024 discloses a universal trailer traction device. The bottom of the draw pin is fixed on the mounting seat. A limit ring groove is provided at the top of the pin column at the top of the draw pin. The drawbar seat includes a cylindrical seat fixed along the longitudinal direction on the top surface of the front end of the trailer frame. The connector includes a connecting portion rotatably sleeved at the bottom of the pin column and a shackle assembly with the bottom end rotatably sleeved at the top end of the connecting portion. On both sides of the center of the top end of the connecting portion, there are respectively provided paddles that can be snapped into the limit ring groove by horizontal swinging. The inner cavity of the shackle assembly is provided with a driving mechanism that drives the two paddles to swing horizontally simultaneously when it rotates synchronously, and a locking mechanism for restricting its rotation is provided on the shackle assembly. The drawbar includes a rod member rotatably sleeved in the inner cavity of the cylindrical seat and a C-shaped member fixed at the front end of the rod member. The inner ends of the two side walls at the front end of the C-shaped member are respectively rotatably sleeved with pivot pins fixedly connected to the two side walls of the connecting portion;

[0004] This invention patent can swing left and right in the horizontal direction, swing in the vertical direction, and rotate axially relatively, so as to meet the normal driving of the tractor and the towed vehicle on off-road roads such as roads with large pitching angles and undulating left and right roads, and avoid phenomena such as vehicle rollover and loss of traction;

[0005] However, this patent also has a problem that the entire traction device cannot achieve height adjustment. Thus, it is very passive and inconvenient when connecting with vehicles of different heights. When connecting with a vehicle with a higher height, the towed vehicle will show a tilted phenomenon. When connecting with a vehicle with a lower height, the towed vehicle will show a forward tilt phenomenon, and the towed vehicle cannot be kept balanced, resulting in the problem of objects on the towed vehicle slipping.

[0006] Therefore, there is an urgent need for a drawbar to realize the height adjustment of the drawbar to keep the towed vehicle balanced and prevent objects from slipping. Summary of the Utility Model

[0007] In view of the above technical problems, the utility model provides a drawbar to solve the problem that the existing drawbar cannot be adjusted in height, and thus the towed vehicle cannot be kept in a horizontal state, resulting in the slipping of objects.

[0008] The above technical purpose of the utility model is achieved through the following technical solutions:

[0009] A drawbar includes a driving arm, with a first adjusting disc provided on each side of the end of the driving arm. A number of first adjusting teeth are circumferentially provided on the first adjusting disc. The first adjusting disc meshes with a second adjusting disc through the first adjusting teeth. An adjusting arm is provided on one side of the second adjusting disc. A first connecting bolt is provided through the adjusting arm at the center positions of the first adjusting disc and the second adjusting disc.

[0010] The other end of the adjusting arm is provided with a third adjusting disc. A number of third adjusting teeth are circumferentially provided on the third adjusting disc. The third adjusting disc meshes with a fourth adjusting disc through the third adjusting teeth. A second connecting bolt is provided through the adjusting arm at the center positions of the third adjusting disc and the fourth adjusting disc.

[0011] A connecting member is connected to the fourth adjusting disc, and a pull ring is detachably installed on the connecting member.

[0012] Further, a fixing groove is provided at the top of the connecting member. At least one fixing hole is vertically provided in the length direction of the fixing groove. A fixing pin is provided in the fixing hole. The pull ring is fixed in the fixing groove through the fixing pin.

[0013] Further, a connecting plate is provided on the driving arm. An adjusting hole is provided in the connecting plate. The connecting plate is hinged to a pull rod through the adjusting hole. The other end of the pull rod is hinged to the connecting member.

[0014] Further, a plurality of adjusting holes are provided along the length direction of the connecting plate.

[0015] Further, the pull ring includes a rod body and a ring body, and the rod body is placed in the fixing groove.

[0016] In summary, the beneficial technical effects of the present utility model are as follows:

[0017] (1) By using the first adjusting disc with the first adjusting teeth and the second adjusting disc with the second adjusting teeth in cooperation with the first connecting bolt, not only the height adjustment of the adjusting arm relative to the driving arm is realized, but also the position can be fixed. When connecting with the tractor through the pull ring, the towed vehicle can be kept in a relatively balanced state, thereby effectively preventing the objects on the towed vehicle from slipping. At the same time, by adjusting the height of the adjusting arm, the pull ring can also be connected to tractors of different heights.

[0018] (2) The angle of the connecting member can be further adjusted by using the third adjusting disc and the fourth adjusting disc.

[0019] (3) The detachable connection between the pull ring and the connecting member is realized by using the fixing groove and the fixing pin, which facilitates the disassembly and replacement of the pull ring.

[0020] (4) The cooperation between the pull rod and the adjustment hole can strengthen the strength of the adjustment arm under the stress condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is Figure 1 a schematic diagram of the structure from another angle;

[0023] Figure 3 is an assembly schematic diagram of the present utility model;

[0024] Figure 4 is a connection schematic diagram of the present utility model and the towed vehicle.

[0025] Reference numerals: 1, driving arm; 2, adjusting arm; 3, connecting member; 4, pull ring; 5, first adjusting disc; 6, second adjusting disc; 7, third adjusting disc; 8, fourth adjusting disc; 10, first connecting bolt; 11, second connecting bolt; 12, fixing groove; 13, fixing pin; 14, ring body; 15, rod body; 16, connecting plate; 17, adjusting hole; 18, pull rod; 19, towed vehicle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present utility model will be clearly and completely described below in conjunction with the embodiments.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In the description of the embodiments, unless otherwise clearly defined and limited, terms such as "set", "connected", etc. 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 connected through an intermediate medium, and it can also be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] Refer to the attached Figures 1-3, shown is a drawbar, including a driving arm 1, the driving arm 1 is used to connect with the towed vehicle 19. On both sides of one end of the driving arm 1, there is respectively provided a first adjusting disc 5. The two first adjusting discs 5 are of circular structure and are symmetrically arranged. A number of first adjusting teeth are circumferentially provided on the first adjusting disc 5. The first adjusting disc 5 meshes with a second adjusting disc 6 through the first adjusting teeth. On the circumference of one side of the second adjusting disc 6 corresponding to the first adjusting teeth, there are provided second adjusting teeth. On the other side of the second adjusting disc 6, there is a C-shaped cross-section adjusting arm 2 welded and fixed. The adjusting arm 2 is provided with a connection hole penetrating through the center positions of the first adjusting disc 5 and the second adjusting disc 6. A first connecting bolt 10 is inserted into the connection hole. When in use, loosen the first connecting bolt 10, then separate the first adjusting disc 5 and the second adjusting disc 6, and then rotate the adjusting arm 2 forward and backward along the first connecting bolt 10. When the rotation is in place, then mesh the first adjusting disc 5 and the second adjusting disc 6 and tighten them with the first connecting bolt 10, so that the height adjustment of the adjusting arm 2 relative to the driving arm 1 can be realized while the towed vehicle 19 is in a balanced state;

[0030] Further, on the other end of the adjusting arm 2 and on the same side as the second adjusting disc 6, there is provided a third adjusting disc 7. A number of third adjusting teeth are circumferentially provided on the third adjusting disc 7. The third adjusting disc 7 meshes with a fourth adjusting disc 8 through the third adjusting teeth. On the circumference of one side of the fourth adjusting disc 8 corresponding to the third adjusting teeth, there are provided fourth adjusting teeth. On the other side of the fourth adjusting disc 8, there is a connecting member 3 fixed. Through the angle adjustment of the adjusting arm 2, the height adjustment of the connecting member 3 is further realized. Similarly, a second connecting bolt 11 is also inserted through the center positions of the third adjusting disc 7 and the fourth adjusting disc 8 of the adjusting arm 2. When adjusting the angle of the connecting member 3, the connecting member 3 can be rotated and the angle can be fixed through the meshing of the third adjusting teeth and the fourth adjusting teeth;

[0031] In addition, on the top of the connecting member 3, there is provided a fixing groove 12. Two fixing holes are opened along the length direction on the fixing groove 12. Fixing pins 13 are provided in the fixing holes. At the same time, a pull ring 4 is provided in the fixing groove 12. The pull ring 4 includes a ring body 14 and a rod body 15. The rod body 15 is placed in the fixing groove 12 and fixed by the fixing pin 13. When in use, fix the pull ring 4 in the fixing groove 12, and then adjust the height of the pull ring 4 by using the adjusting arm 2 according to the height of the tractor's towing device;

[0032] Further, in order to strengthen the strength of the whole adjusting arm 2 during towing, a connecting plate 16 is provided on the driving arm 1. A number of adjusting holes 17 are opened along the length direction on the connecting plate 16. The connecting plate 16 is hinged with a pull rod 18 through the adjusting holes 17. The other end of the pull rod 18 is hinged on the connecting member 3. In this way, not only the structural strength of the adjusting arm 2 is improved by the pull rod 18, but also the angle adjustment of the adjusting arm 2 can be realized in cooperation with the adjusting holes 17 at different positions.

[0033] When in use, refer to the appendixFigure 4 , as shown, first connect the entire drawbar to the towed vehicle 19 through the drive arm 1, and then adjust the height of the connecting member 3 according to the height of the tractor's tractor. When adjusting the height of the connecting member 3, loosen the first connecting bolt 10, and at the same time loosen one end of the pull rod 18 hinged to the connecting plate 16. Then rotate the adjusting arm 2 forward and backward so that the pull ring 4 is exactly at the position of the tractor. Then engage the first adjusting tooth and the second adjusting tooth and fasten them with the first connecting bolt 10. Then hinge one end of the pull rod 18 to the connecting plate 16, and then place the pull ring 4 in the tractor to achieve towing. During the entire process of height and angle adjustment, the towed vehicle 19 is in a balanced state, which can effectively keep the objects on the towed vehicle 19 stable and prevent them from slipping.

[0034] The above is only a preferred specific embodiment of the present invention, and does not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A traction rod, comprising a driving arm (1), characterized in that: A first adjustment disk (5) is provided on each side of the end of the driving arm (1); a plurality of first adjustment teeth are provided on the circumference of the first adjustment disk (5); the first adjustment disk (5) is meshed with a second adjustment disk (6) via the first adjustment teeth; an adjustment arm (2) is provided on one side of the second adjustment disk (6); the adjustment arm (2) is located at the center of the first adjustment disk (5) and the second adjustment disk (6) and is penetrated by a first connecting bolt (10); The other end of the adjusting arm (2) is provided with a third adjusting disk (7), a plurality of third adjusting teeth are provided on the circumference of the third adjusting disk (7), the third adjusting disk (7) is meshed with a fourth adjusting disk (8) via the third adjusting teeth, and a second connecting bolt (11) is provided through the adjusting arm (2) at the center of the third adjusting disk (7) and the fourth adjusting disk (8); The fourth adjustment disk (8) is connected to a connecting piece (3), and a pull ring (4) is detachably mounted on the connecting piece (3).

2. A traction rod according to claim 1, characterized in that: A fixing groove (12) is provided at the top of the connecting member (3), the fixing groove (12) is provided with at least one fixing hole perpendicular to the length direction, a fixing pin (13) is provided in the fixing hole, and the pull ring (4) is fixed in the fixing groove (12) by the fixing pin (13).

3. A traction rod according to claim 1, characterized in that: The driving arm (1) is provided with a connecting plate (16), the connecting plate (16) is provided with an adjusting hole (17), the connecting plate (16) is hingedly connected to a pull rod (18) through the adjusting hole (17), and the other end of the pull rod (18) is hingedly connected to the connecting member (3).

4. A traction rod according to claim 3, characterized in that: A plurality of adjustment holes (17) are provided along the length direction of the connecting plate (16).

5. A traction rod according to claim 2, characterized in that: The pull ring (4) comprises a rod body (15) and a ring body (14), and the rod body (15) is placed in the fixing groove (12).

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