Multifunctional trailer arm with high structural strength

Abstract

The utility model relates to the technical field of trailer arms, and discloses a multifunctional trailer arm with high structural strength, which comprises a first arm body and a second arm body, the first arm body is used for being connected with a traction vehicle, the second arm body is arranged on the first arm body in a sliding mode so as to adjust the height position of the second arm body, and a trailer piece is arranged on the second arm body. A positioning mechanism is arranged between the first arm body and the second arm body, the second arm body and the first arm body are positioned through the positioning mechanism, the positioning mechanism comprises a first positioning pin, a positioning through hole and a positioning groove, the positioning through hole and the positioning groove both correspond to the first positioning pin, the positioning through hole is formed in the second arm body, and the positioning through hole is formed in the second arm body. The multiple positioning grooves are formed in the first arm body. According to the multifunctional trailer arm with the high structural strength, the positioning pin and the positioning groove in the first arm body are clamped and positioned, a pin hole does not need to be formed in the first arm body, the structural strength is high, the first arm body is not prone to deformation, breakage and the like during trailer, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer arms, in particular to a multifunctional trailer arm with high structural strength. Background Art

[0002] A trailer arm is a trailer tool used for towing a vehicle. The trailer arm generally includes a trailer arm body and a trailer ball head connected to the trailer arm body. The trailer arm body is usually used to be installed on a towing vehicle, while the trailer ball head is usually used to be connected to a towed vehicle such as a trailer or a broken vehicle. Some existing trailer arms include a first arm body and a second arm body that can slide up and down relative to the first arm body. The first arm body is used to connect with the towing vehicle, and the second arm body is provided with a trailer part (such as a trailer ball head, etc.) for connecting to the towed vehicle. After the second arm body slides to a desired height relative to the first arm body, one or more positioning pins penetrate the first arm body and the second arm body for positioning. The first arm body and the second arm body are provided with pin holes for installing the positioning pins. The provision of the pin holes will greatly reduce the structural strength of the first arm body, resulting in a reduction in the maximum bearing tension during towing, which will cause the first arm body to be easily deformed, broken, and other problems during towing.

[0003] In addition, some existing trailer arms have trailer ball heads of a single size. When a ball head of another size is needed, the original ball head needs to be removed and a new large or small ball head needs to be installed. Replacing the ball head is time-consuming and laborious, has a single function, and provides a poor user experience. Utility Model Content

[0004] In order to solve at least one aspect of the above problems, the utility model provides a multifunctional trailer arm with high structural strength, including: a first arm body and a second arm body, the first arm body is used to connect with a towing vehicle, the second arm body is slidably arranged on the first arm body to adjust the height position of the second arm body, a trailer part is arranged on the second arm body, a positioning mechanism is arranged between the first arm body and the second arm body, the second arm body is positioned with the first arm body through the positioning mechanism, the positioning mechanism includes a first positioning pin, a positioning through hole and a positioning groove, the positioning through hole and the positioning groove both correspond to the first positioning pin, and the positioning A through hole is provided on the second arm body, and a plurality of positioning grooves are provided and are provided on the first arm body, and the plurality of positioning grooves are distributed along the sliding direction of the second arm body; when the first arm body and the second arm body are positioned by the positioning mechanism, the first positioning pin passes through the positioning through hole along its own axial direction, and the side wall of the first positioning pin is engaged with one of the positioning grooves for positioning; the multifunctional trailer arm of the utility model has high structural strength, and is positioned by engaging the positioning pin with the positioning groove on the first arm body, without the need to open a pin hole in the first arm body, and has high structural strength. The first arm body is not prone to deformation, breakage and other problems when towing, and has a long service life.

[0005] Optionally, the first positioning pin is cylindrical, the positioning through hole is a circular through hole, and the positioning groove is an arc groove.

[0006] Optionally, the first arm body comprises a transverse block and a vertical block, the transverse block is used to be connected to a towing vehicle, the second arm body is slidably disposed on the vertical block, and the positioning groove is disposed at a side end of the vertical block.

[0007] Optionally, the transverse block and the vertical block are integrally formed, and a reinforcing block is integrally provided at the connection between the transverse block and the vertical block.

[0008] Optionally, a convex strip is provided on the vertical block, the convex strip extends along the sliding direction of the second arm body, and the positioning groove is provided on the convex strip.

[0009] Optionally, a sliding groove corresponding to the vertical block is provided on the second arm body, and a limiting groove corresponding to the convex strip is provided on the second arm body, and the convex strip is placed in the limiting groove for limiting.

[0010] Optionally, the trailer member is arranged at a side end of the second arm body, and the limiting groove is arranged at an end of the second arm body away from the trailer member.

[0011] Optionally, the second arm slides in a vertical direction.

[0012] Optionally, a limiting column is provided at one end of the first positioning pin, and a limiting lock is detachably provided at the other end of the first positioning pin.

[0013] Optionally, a rotating block is rotatably provided on the second arm body, the trailer part is connected to the rotating block, a second positioning pin for positioning the rotating block is provided on the second arm body, a first positioning hole corresponding to the second positioning pin is provided on the second arm body, a second positioning hole corresponding to the second positioning pin is provided on the rotating block, the trailer part includes a first trailer part and a second trailer part, the first trailer part is a first trailer ball head, a first trailer ring or a first trailer hook, and the second trailer part is a second trailer ball head, a second trailer ring or a second trailer hook.

[0014] Compared with the prior art, the multifunctional trailer arm of the utility model has high structural strength, and is positioned by engaging the positioning pin with the positioning groove on the first arm body, and there is no need to open a pin hole in the first arm body. The utility model has high structural strength, and the first arm body is not prone to deformation, breakage and other problems when towing, and has a long service life; the side wall of the first positioning pin is an arc-shaped side wall, and the positioning groove is positioned by the arc surface when engaging with the first positioning pin, and the force is uniform, the engagement is stable, it is not easy to fall out by mistake, and it is reliable to use; a reinforcing block is integrally provided at the connection between the horizontal block and the vertical block, which increases the structural strength of the connection between the horizontal block and the vertical block, making it not easy to break; a sliding groove corresponding to the vertical block is provided on the second arm body, and the vertical block slides in the sliding groove along the height direction, and the sliding is smooth and stable; a key hole is provided on the limit lock head, and when disassembling, the limit lock head and the first positioning pin can be removed by unlocking the key, which is safe and reliable to use and simple to operate; the number and specific types of trailer parts can be set according to needs, and the scope of use is wide to meet different trailer needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a first embodiment of a multifunctional trailer arm with high structural strength according to the utility model;

[0016] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0017] Figure 3 This is a structural schematic diagram of a first embodiment of the utility model of a multifunctional trailer arm with high structural strength;

[0018] Figure 4 It is a cross-sectional view of the first embodiment of the multifunctional trailer arm with high structural strength of the utility model;

[0019] Figure 5 This is a structural schematic diagram of a second embodiment of the utility model of a multifunctional trailer arm with high structural strength;

[0020] Figure 6This is a structural schematic diagram of a third embodiment of the utility model of a multifunctional trailer arm with high structural strength;

[0021] The corresponding component names of the various figure marks in the figure are: 1 is the first arm body, 11 is the horizontal block, 12 is the vertical block, 121 is the convex strip, 2 is the second arm body, 21 is the slide groove, 22 is the limiting groove, 23 is the first positioning hole, 24 is the second positioning hole, 3 is the trailer part, 31 is the first trailer part, 32 is the second trailer part, 33 is the third trailer part, 34 is the fourth trailer part, 4 is the first positioning pin, 41 is the side wall, 42 is the limiting column, 43 is the limiting lock, 431 is the keyhole, 5 is the positioning through hole, 6 is the positioning groove, 7 is the rotating block, 8 is the second positioning pin, and 10 is the reinforcement block. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is in normal use.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0025] Embodiment 1:

[0026] See also Figure 1-Figure 4The first embodiment of the utility model provides a multifunctional trailer arm with high structural strength, including: a first arm body 1 and a second arm body 2, both of which are made of metal, the first arm body 1 is used to connect with the towing vehicle, the second arm body 2 is slidably arranged on the first arm body 1 to adjust the height position of the second arm body 2, and the second arm body 2 is provided with a trailer part 3 for connecting the towed vehicle, a positioning mechanism is arranged between the first arm body 1 and the second arm body 2, and the second arm body 2 is positioned with the first arm body 1 through the positioning mechanism, and the positioning mechanism includes a first positioning pin 4, a positioning through hole 5 and a positioning groove 6, and the positioning through hole 5 and the positioning groove 6 both correspond to the first positioning pin 4, the positioning through hole 5 is arranged on the second arm body 2, and the positioning groove 6 is provided with a plurality of and arranged On the first arm body 1, multiple positioning grooves 6 are distributed along the sliding direction of the second arm body 2. According to the needs, a corresponding positioning groove 6 is selected to engage with the first positioning pin 4 for positioning, so that the second arm body 2 is positioned at the required height, so as to adjust the height of the trailer to suit different vehicle models; when the first arm body 1 and the second arm body 2 are positioned by the positioning mechanism, the first positioning pin 4 passes through the positioning through hole 5 along its own axial direction, and the side wall 41 of the first positioning pin 4 is engaged with one of the positioning grooves 6 for positioning; the multifunctional trailer arm with high structural strength of the utility model is positioned by engaging the positioning pin with the positioning groove on the first arm body, and there is no need to open a pin hole in the first arm body. The structural strength is high, the first arm body is not prone to deformation, breakage and other problems when towing, and the service life is long.

[0027] See also Figure 1 , Figure 2 and Figure 4 The first positioning pin 4 is cylindrical, the positioning through hole 5 is a circular through hole, the positioning groove 6 is an arc groove, the side wall 41 of the first positioning pin 4 is an arc side wall, and the positioning groove 6 is positioned by the arc surface when the first positioning pin 4 is engaged, the force is uniform, the engagement is stable, it is not easy to be accidentally disengaged, and it is reliable to use; the first arm body 1 includes a horizontal block 11 and a vertical block 12, the horizontal block 11 and the vertical block 12 are vertical or approximately vertical, the first arm body 1 is L-shaped, the horizontal block 11 is used to connect with the towing vehicle, and the second arm body 2 is slidably arranged at On the vertical block 12, a positioning groove 6 is arranged at the side end of the vertical block 12, and the positioning groove 6 is located on the side of the vertical block 12 close to the horizontal block 11; the horizontal block 11 and the vertical block 12 are integrally formed, and a reinforcing block 10 is integrally arranged at the connection between the horizontal block 11 and the vertical block 12 to increase the structural strength of the connection between the horizontal block 11 and the vertical block 12, so that it is not easy to break; a convex strip 121 is arranged on the vertical block 12, and the convex strip 121 extends along the sliding direction of the second arm body 2, and the positioning groove 6 is arranged on the convex strip 121, and the structural design is reasonable.

[0028] See also Figure 1-Figure 4The second arm body 2 is provided with a slide groove 21 corresponding to the vertical block 12, and the vertical block 12 slides in the slide groove 21 along the height direction, and the sliding is smooth and stable; the second arm body 2 is provided with a limiting groove 22 corresponding to the convex strip 121, and the convex strip 121 is placed in the limiting groove 22 for limiting, so that the sliding is smooth; the trailer part 3 is arranged at the side end of the second arm body 2, and the limiting groove 22 is arranged at the end of the second arm body 2 away from the trailer part 3, and the structural design is reasonable; the second arm body 2 slides in the vertical direction, and the height of the trailer part 3 is adjusted by sliding the second arm body 2.

[0029] See also Figure 1 , Figure 3 and Figure 4 A limiting column 42 is provided at one end of the first positioning pin 4, and a limiting lock 43 is detachably provided at the other end of the first positioning pin 4. When installing, first slide the second arm 2 to the corresponding height, and then insert the end of the first positioning pin 4 away from the limiting column 42 into the positioning through hole 5. At this time, the side wall of the first positioning pin 4 is engaged with one of the positioning grooves 6 for positioning, and then the limiting lock 43 is plugged and locked with the end of the first positioning pin 4 away from the limiting column 42. A key hole 431 is provided on the limiting lock 43. When disassembling, only a key is needed. The limit lock 43 and the first positioning pin 4 can be removed by unlocking, which is safe and reliable to use and easy to operate; a rotating block 7 is rotatably provided on the second arm body 2, and the trailer part 3 is connected to the rotating block 7. A second positioning pin 8 for positioning the rotating block 7 is provided on the second arm body 2, and a first positioning hole 23 corresponding to the second positioning pin 8 is provided on the second arm body 2, and a second positioning hole 24 corresponding to the second positioning pin 8 is provided on the rotating block 7. There are two second positioning holes 24 distributed vertically, so that the rotating block 7 can rotate 90 degrees every time After the degree is reached, the second positioning pin 8 can be loaded for positioning. The trailer component 3 includes a first trailer component 31 and a second trailer component 32. At least two trailer components are provided for selection. In the first embodiment, the trailer component 3 also includes a third trailer component 33 and a fourth trailer component 34. The four trailer components are distributed in a ring with equal spacing; the first trailer component 31 is a first trailer ball head, a first trailer ring or a first trailer hook, the second trailer component 32 is a second trailer ball head, a second trailer ring or a second trailer hook, and the third trailer component 33 is a third trailer ball head, a third trailer ring or a third trailer hook. A towing ring or a third towing hook, the fourth towing component 34 is a fourth towing ball head, a fourth towing ring or a fourth towing hook; in the first embodiment, the first towing component 31 is a first towing ball head, the second towing component 32 is a second towing ball head, and the third towing component 33 is a third towing ball head. The diameters of the first towing ball head, the second towing ball head and the third towing ball head are different to meet different towing requirements. The fourth towing component 34 is a towing ring; the number and specific types of towing components can be set according to requirements, and the scope of use is wide.

[0030] Embodiment 2:

[0031] See also Figure 5The difference between the second embodiment and the first embodiment is that the third trailer component 33 is a trailer hook, and the fourth trailer component is not provided to meet different trailer requirements.

[0032] Embodiment three:

[0033] See also Figure 6 The difference between the third embodiment and the first embodiment is that the fourth trailer part 34 is not provided, so as to save costs.

[0034] The multifunctional trailer arm of the utility model has high structural strength, and is positioned by engaging the positioning pin with the positioning groove on the first arm body, and there is no need to open a pin hole in the first arm body. The structural strength is high, and the first arm body is not easy to deform, break, and other problems when towing, and the service life is long; the side wall of the first positioning pin is an arc-shaped side wall, and the positioning groove and the first positioning pin are locked and positioned by the arc surface, and the force is uniform, the locking is stable, and it is not easy to fall out by mistake, and it is reliable to use; the connection between the horizontal block and the vertical block is integrally provided with a reinforcing block, which increases the structural strength of the connection between the horizontal block and the vertical block, making it not easy to break; the second arm body is provided with a sliding groove corresponding to the vertical block, and the vertical block slides in the sliding groove along the height direction, and the sliding is smooth and stable; the limit lock head is provided with a key hole, and when disassembling, the limit lock head and the first positioning pin can be removed by unlocking the key, which is safe and reliable to use and simple to operate; the number and specific types of trailer parts can be set according to needs, and the scope of use is wide, meeting different trailer needs.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multifunctional trailer arm with high structural strength, comprising: A first arm body (1) and a second arm body (2), wherein the first arm body (1) is used to connect to a towing vehicle, and is characterized in that the second arm body (2) is slidably arranged on the first arm body (1) to adjust the height position of the second arm body (2), a trailer part (3) is arranged on the second arm body (2), a positioning mechanism is arranged between the first arm body (1) and the second arm body (2), and the second arm body (2) is positioned with the first arm body (1) through the positioning mechanism, and the positioning mechanism comprises a first positioning pin (4), a positioning through hole (5) and a positioning groove (6), and the positioning through hole (5) is provided with ... trailer part (3) ) and the positioning groove (6) both correspond to the first positioning pin (4), the positioning through hole (5) is arranged on the second arm body (2), a plurality of the positioning grooves (6) are arranged on the first arm body (1), and the plurality of positioning grooves (6) are distributed along the sliding direction of the second arm body (2); when the first arm body (1) and the second arm body (2) are positioned by the positioning mechanism, the first positioning pin (4) passes through the positioning through hole (5) along its own axial direction, and the side wall (41) of the first positioning pin (4) is engaged with one of the positioning grooves (6) for positioning.

2. The multifunctional trailer arm with high structural strength as claimed in claim 1, characterized in that: The first positioning pin (4) is cylindrical, the positioning through hole (5) is a circular through hole, and the positioning groove (6) is an arc groove.

3. The multifunctional trailer arm with high structural strength as claimed in claim 1, characterized in that: The first arm body (1) comprises a transverse block (11) and a vertical block (12), the transverse block (11) being used to connect with a towing vehicle, the second arm body (2) being slidably arranged on the vertical block (12), and the positioning groove (6) being arranged at a side end of the vertical block (12).

4. The multifunctional trailer arm with high structural strength as claimed in claim 3, characterized in that: The transverse block (11) and the vertical block (12) are integrally formed, and a reinforcing block (10) is integrally provided at the connection between the transverse block (11) and the vertical block (12).

5. The multifunctional trailer arm with high structural strength as claimed in claim 3, characterized in that: The vertical block (12) is provided with a convex strip (121), the convex strip (121) extends along the sliding direction of the second arm body (2), and the positioning groove (6) is provided on the convex strip (121).

6. The multifunctional trailer arm with high structural strength as claimed in claim 5, characterized in that: The second arm body (2) is provided with a sliding groove (21) corresponding to the vertical block (12), and the second arm body (2) is provided with a limiting groove (22) corresponding to the convex strip (121), and the convex strip (121) is placed in the limiting groove (22) for limiting.

7. The multifunctional trailer arm with high structural strength as claimed in claim 6, characterized in that: The trailer part (3) is arranged at the side end of the second arm body (2), and the limiting groove (22) is arranged at an end of the second arm body (2) away from the trailer part (3).

8. The multifunctional trailer arm with high structural strength as claimed in claim 1, characterized in that: The second arm body (2) slides in a vertical direction.

9. The multifunctional trailer arm with high structural strength as claimed in claim 1, characterized in that: A limiting column (42) is provided at one end of the first positioning pin (4), and a limiting lock head (43) is detachably provided at the other end of the first positioning pin (4).

10. The multifunctional trailer arm with high structural strength as claimed in claim 1, characterized in that: A rotating block (7) is rotatably arranged on the second arm body (2), the trailer component (3) is connected to the rotating block (7), a second positioning pin (8) for positioning the rotating block (7) is arranged on the second arm body (2), a first positioning hole (23) corresponding to the second positioning pin (8) is arranged on the second arm body (2), and a second positioning hole (24) corresponding to the second positioning pin (8) is arranged on the rotating block (7), the trailer component (3) comprises a first trailer component (31) and a second trailer component (32), the first trailer component (31) is a first trailer ball head, a first trailer ring or a first trailer hook, and the second trailer component (32) is a second trailer ball head, a second trailer ring or a second trailer hook.

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