Trailer traction adjustable device

Abstract

The utility model provides a trailer traction adjustable device which comprises a main body frame, an extension rod is arranged at one end of the main body frame, a first connecting arm is matched with the extension rod, a second connecting arm is matched with one end of the first connecting arm, guard plates are matched with the two sides of the second connecting arm, and locking gears are matched between the guard plates and the second connecting arm and between the guard plates and the extension rod. And a gas spring is matched between the second connecting arm and the extension rod, so that the device has the advantages that the device can be matched with a traction trailer conveniently by adjusting the height of the second connecting arm, and the extension rod, the first connecting arm, the second connecting arm and the protective plate form a parallelogram, so that the overall stability is improved; and secondly, the second connecting arm is always horizontal above the extension rod, it is guaranteed that the main body frame is kept in a stable posture, mutual meshing between gears can be achieved in the process that the locking rod moves on the threaded rod in a threaded mode, therefore, the purpose of locking and positioning is achieved, and the second connecting arm can be adjusted by releasing the meshing and locking state.

Description

Technical Field

[0001] The utility model belongs to the technical field of trailer traction, and in particular relates to an adjustable trailer traction device. Background Art

[0002] At present, the height of the trailer frame connection is generally higher than the height of the cart, which makes the trailer traction frame in a tilted state when connected and installed. During acceleration and braking, the movement trend of the cart has a tendency to lift up and press down the front, which is not conducive to the smooth operation of the cart.

[0003] Therefore, in view of the shortcomings of the above scheme in actual production and implementation, it has been revised and improved. At the same time, in the spirit and concept of seeking improvement, with the assistance of professional knowledge and experience, as well as after many ingenuity and experiments, the present utility model was created, and a trailer traction adjustable device is provided to solve the above problems. Utility Model Content

[0004] The utility model provides a trailer traction adjustable device, which solves the problems in the prior art.

[0005] The technical solution of the utility model is achieved as follows: an adjustable trailer towing device comprises: a main frame, an extension rod is provided at one end of the main frame, a first connecting arm is matched with the extension rod, a second connecting arm is matched with one end of the first connecting arm, guard plates are matched with both sides of the second connecting arm, and locking gears are matched between the guard plates, the second connecting arm and the extension rod;

[0006] A gas spring is provided between the second connecting arm and the extension rod.

[0007] With the above solution, the extension rod, the first connecting arm, the second connecting arm, and the guard plate form a parallelogram to improve the overall stability. Secondly, the second connecting arm is always horizontal above the extension rod to ensure that the main frame maintains a stable posture.

[0008] As a preferred embodiment of the trailer towing adjustable device, a limit frame is provided on one side of the extension rod, an auxiliary wheel assembly is provided below the limit frame, a column is provided on the auxiliary wheel assembly, the column is slidably fitted in the limit frame, the column contains a plurality of holes, and positioning pins are inserted into the holes, and a socket for fitting the positioning pins is provided on the limit frame.

[0009] By adopting the above solution, the auxiliary wheel assembly can adjust the distance from the ground, so as to better adjust the second connecting arm.

[0010] As a preferred embodiment of the adjustable trailer traction device, shafts cooperating with the extension rod and the second connecting arm are provided at both ends of the first connecting arm.

[0011] As a preferred embodiment of the adjustable trailer traction device, a connecting head is provided at the end of the second connecting arm.

[0012] As a preferred embodiment of the trailer towing adjustable device, a second gear is provided at the proximal end of the inner wall at both ends of the guard plate, a first gear is provided at the second connecting arm corresponding to the second gear, and a third gear is provided at the extension rod corresponding to the second gear, and the second gears on the inner walls at both ends of the guard plate are respectively engaged with the first gear and the third gear.

[0013] As a preferred embodiment of an adjustable trailer towing device, the guard plate includes a left guard plate and a right guard plate. A threaded rod is provided on the left guard plate, which is inserted through the left guard plate and extends from the right guard plate. A locking rod is threadedly engaged on the extended end, and a socket is provided at the proximal end of the extended end, and a pin is inserted into the socket.

[0014] As a preferred embodiment of the trailer towing adjustable device, a positioning block for limiting the threaded rod is provided on the outer wall of the left guard plate.

[0015] By adopting the above solution, the threaded movement of the locking rod on the threaded rod can realize the mutual engagement of the gears, thereby achieving the purpose of locking and positioning. The second connecting arm can be adjusted by releasing the meshing locking state.

[0016] As a preferred embodiment of the trailer towing adjustable device, a first axis plate is provided at the bottom of the second connecting arm, a second axis plate is provided at the end of the extension rod, and both ends of the gas spring are respectively matched with the first axis plate and the second axis plate.

[0017] With the above solution, the gas spring uses air as the elastic medium and utilizes the compression elasticity of the gas to achieve the function of a spring, thereby achieving assisting and buffering for the second connecting arm.

[0018] After adopting the above technical solution, the beneficial effect of the utility model is that by adjusting the height of the second connecting arm, the coordination with the towing trailer is greatly facilitated.

[0019] The extension rod, the first connecting arm, the second connecting arm, and the guard plate form a parallelogram to improve the overall stability. Secondly, the second connecting arm is always horizontal above the extension rod to ensure that the main frame maintains a stable posture.

[0020] The process of the locking rod threadedly moving on the threaded rod can realize the mutual engagement between the gears, thereby achieving the purpose of locking and positioning. The second connecting arm can be adjusted by releasing the meshing locking state. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 This is a schematic diagram of the structure of the adjustable trailer traction device of the utility model;

[0023] Figure 2 This is a front view of the structure of the adjustable trailer traction device of the utility model;

[0024] Figure 3 This is a schematic diagram of the extension rod structure of the utility model;

[0025] Figure 4 This is a bottom view of the structure of the utility model trailer traction adjustable device Figure 1 ;

[0026] Figure 5 This is a bottom view of the structure of the utility model trailer traction adjustable device Figure 2 ;

[0027] Figure 6 This is a disassembled diagram of the locking and matching relationship between the guard plate and the second connecting arm of the utility model;

[0028] In the figure, 1-main frame; 2-extension rod; 3-limiting frame; 4-auxiliary wheel assembly; 5-column; 6-first connecting arm; 7-second connecting arm; 8-connecting head; 9-guard plate; 10-positioning block; 11-gas spring; 12-first shaft plate; 13-second shaft plate; 14-first gear; 15-second gear; 16-threaded rod; 17-locking rod; 18-pin; 19-socket; 20-third gear. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figure 1-3As shown, a trailer towing adjustable device includes: a main frame 1, an extension rod 2 is provided at one end of the main frame 1, a first connecting arm 6 is matched with the extension rod 2, a second connecting arm 7 is matched with one end of the first connecting arm 6, guard plates 9 are matched on both sides of the second connecting arm 7, locking gears are matched between the guard plates 9 and the second connecting arm 7 and the extension rod 2, and a gas spring 11 is matched between the second connecting arm 7 and the extension rod 2.

[0031] Among them, a limit frame 3 is set on one side of the extension rod 2, and an auxiliary wheel assembly 4 is set below the limit frame 3. A column 5 is set on the auxiliary wheel assembly 4, and the column 5 slides in the limit frame 3. The column 5 contains several holes, and positioning pins are inserted into the holes. The limit frame 3 is provided with a socket for matching the positioning pins.

[0032] Furthermore, the extension rod 2, the first connecting arm 6, the second connecting arm 7, and the guard plate 9 form a parallelogram to improve the overall stability. Secondly, the second connecting arm 9 is always horizontal above the extension rod to ensure that the main frame 1 maintains a stable posture.

[0033] Furthermore, the auxiliary wheel assembly 4 can adjust the distance from the ground to facilitate better adjustment of the second connecting arm 7.

[0034] like Figure 4-6 As shown, shafts cooperating with the extension rod 2 and the second connecting arm 7 are provided at both ends of the first connecting arm 6 .

[0035] A connecting head 8 is provided at the end of the second connecting arm 7 .

[0036] Among them, a second gear 15 is provided at the proximal end of the inner wall at both ends of the guard plate 9, the second connecting arm 7 is provided with a first gear 14 corresponding to the second gear 15, and the extension rod 2 is provided with a third gear 20 corresponding to the second gear 15. The second gear 15 on the inner wall at both ends of the guard plate 9 is respectively engaged with the first gear 14 and the third gear 20.

[0037] Among them, the guard plate 9 includes a left guard plate and a right guard plate. A threaded rod 16 is provided on the left guard plate. The threaded rod 16 is inserted through the left guard plate and extends from the right guard plate. A locking rod 17 is threadedly fitted on the extended end, and a socket 19 is provided at the proximal end of the extended end. A pin 18 is inserted into the socket 19.

[0038] A positioning block 10 for limiting the threaded rod 16 is provided on the outer wall of the left guard plate.

[0039] Among them, a first shaft plate 12 is provided at the bottom of the second connecting arm 7, a second shaft plate 13 is provided at the end of the extension rod 2, and both ends of the gas spring 11 are matched with the first shaft plate 12 and the second shaft plate 13 respectively.

[0040] Furthermore, the threaded movement of the locking rod 17 on the threaded rod 16 can realize the mutual engagement between the gears, thereby achieving the purpose of locking and positioning, and the adjustment of the second connecting arm 7 can be achieved by releasing the meshing and locking state.

[0041] Furthermore, the gas spring 11 uses air as an elastic medium and utilizes the compression elasticity of the gas to achieve the function of a spring, thereby providing assistance and buffering for the second connecting arm 7 .

[0042] By adjusting the height of the second connecting arm 7, the coordination with the towing trailer is greatly facilitated.

[0043] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A trailer traction adjustable device, characterized in that: include: A main frame (1), wherein an extension rod (2) is provided at one end of the main frame (1), a first connecting arm (6) is matched with the extension rod (2), a second connecting arm (7) is matched with one end of the first connecting arm (6), guard plates (9) are matched on both sides of the second connecting arm (7), and a locking gear is matched between the guard plate (9), the second connecting arm (7) and the extension rod (2); A gas spring (11) is provided between the second connecting arm (7) and the extension rod (2).

2. The trailer traction adjustable device according to claim 1, characterized in that: A limiting frame (3) is provided on one side of the extension rod (2), an auxiliary wheel assembly (4) is provided below the limiting frame (3), a column (5) is provided on the auxiliary wheel assembly (4), the column (5) is slidably fitted in the limiting frame (3), the column (5) contains a plurality of holes, and positioning pins are inserted into the holes, and a socket for fitting the positioning pins is provided on the limiting frame (3).

3. The trailer traction adjustable device according to claim 1, characterized in that: Both ends of the first connecting arm (6) are provided with shafts that cooperate with the extension rod (2) and the second connecting arm (7).

4. The trailer traction adjustable device according to claim 1, characterized in that: A connecting head (8) is provided at the end of the second connecting arm (7).

5. The trailer traction adjustable device according to claim 1, characterized in that: The inner wall proximal end portions of both ends of the guard plate (9) are provided with a second gear (15), the second connecting arm (7) is provided with a first gear (14) corresponding to the second gear (15), the extension rod (2) is provided with a third gear (20) corresponding to the second gear (15), and the second gears (15) on the inner walls of both ends of the guard plate (9) are respectively engaged with the first gear (14) and the third gear (20).

6. The trailer traction adjustable device according to claim 1, characterized in that: The guard plate (9) comprises a left guard plate and a right guard plate. A threaded rod (16) is provided on the left guard plate. The threaded rod (16) is inserted through the left guard plate and extends from the right guard plate. A locking rod (17) is threadedly engaged on the extended end. A socket (19) is provided at the proximal end of the extended end. A latch pin (18) is inserted into the socket (19).

7. The trailer traction adjustable device according to claim 6, characterized in that: A positioning block (10) for limiting the threaded rod (16) is provided on the outer wall of the left guard plate.

8. The trailer traction adjustable device according to claim 1, characterized in that: A first shaft plate (12) is provided at the bottom of the second connecting arm (7), a second shaft plate (13) is provided at the end of the extension rod (2), and both ends of the gas spring (11) are respectively matched with the first shaft plate (12) and the second shaft plate (13).

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