Trailer arm with screw adjusting mechanism

Abstract

The utility model relates to the technical field of trailer tools, and discloses a trailer arm with a screw adjusting mechanism. Comprising a trailer arm, the trailer arm comprises a first arm body and a second arm body in sliding connection with the first arm body, the first arm body is provided with a screw rotating in the circumferential direction, the axis of the screw is perpendicular to the horizontal plane, the second arm body is provided with a through groove in threaded connection with the screw, and the upper end of the screw is provided with a driving part used for driving the screw to rotate. The driving part is rotated through external force and drives the screw rod to rotate in the circumferential direction, so that the second arm body moves up and down along the screw rod. According to the screw adjusting mechanism, the screw and the sliding groove which are matched with each other are arranged, so that the first arm body and the second arm body can slide up and down, the height of the second arm body is adjusted to be matched, towed vehicles with different heights are used, the screw adjusting mechanism is simple in structure, a user can conveniently rotate the screw through the driving part, and the screw adjusting mechanism is more convenient and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer tools, in particular to a trailer arm with a screw rod adjusting mechanism. Background Art

[0002] A trailer arm is a trailer tool used for towing a vehicle. A trailer arm generally includes a trailer arm body and a trailer part connected to the trailer arm body. The trailer part is generally a trailer ball head or a trailer hook. The trailer arm body is usually installed on the towing vehicle, while the trailer part is usually connected to the towed vehicle such as a trailer or a broken vehicle. Because the height of the towed vehicle is different, the matching height with the trailer part is also different. The installation height of some existing trailer arms cannot be adjusted, or the adjustment is inconvenient, time-consuming and labor-intensive, and the user experience is not good. Utility Model Content

[0003] In order to solve at least one aspect of the above-mentioned problems, the utility model provides a trailer arm with a screw adjustment mechanism, including a trailer arm, the trailer arm including a first arm body and a second arm body slidably connected to the first arm body, the first arm body is provided with a circumferentially rotating screw, the axis of the screw is perpendicular to a horizontal plane, the second arm body is provided with a through groove threadably connected to the screw, the upper end of the screw is provided with a driving part for driving the screw to rotate, the driving part is rotated by external force, and the driving part drives the screw to rotate circumferentially, so that the second arm body moves up and down along the screw.

[0004] Optionally, the driving part includes a handle, and the handle is rotated by external force to drive the screw to rotate.

[0005] Optionally, the first arm body is provided with a slide groove along the vertical direction, and the second arm body is provided with a sliding block adapted to the slide groove, and the sliding block slides up and down in the slide groove.

[0006] Optionally, the second arm body is provided with two sliding blocks, the first arm body is provided with two sliding grooves, the two sliding blocks are arranged opposite to each other and form a mounting cavity with an opening on the second arm body, and the first arm body is slidably connected to the mounting cavity.

[0007] Optionally, the first arm body is provided with a plurality of first through holes along the vertical direction, the second arm body is provided with second through holes corresponding to the first through holes, and detachable positioning pins are inserted into the first through holes and the second through holes.

[0008] Optionally, one end of the second arm body away from the first arm body is rotatably connected to a rotating block, the rotating block is provided with a third through hole, the second arm body is provided with a fourth through hole, and a detachable locking pin is inserted in the rotating block and the second arm body.

[0009] Optionally, the rotating block includes a mounting portion, the second arm body is provided with a mounting groove matched with the mounting portion, the mounting portion can be rotatably installed in the mounting groove, and the third through hole is provided on the mounting portion.

[0010] Optionally, a locking sleeve is further included, an end of the positioning pin is fixedly connected to the locking sleeve, an end of the locking pin is fixedly connected to the locking sleeve, and the locking sleeve is used to lock / unlock the positioning pin and the locking pin.

[0011] Optionally, a locking groove is provided on the second arm body, and a locking block is provided on the locking sleeve, and the locking groove and the locking block cooperate with each other so that the second arm body and the locking sleeve are detachably connected.

[0012] Optionally, the side end of the second arm body is rotatably connected to a rotating block, and the rotating block has a rotating axis when rotating. The rotating block is fixedly provided with a first trailer part and a second trailer part for trailering, and the first trailer part and the second trailer part are distributed in a ring around the rotating axis of the rotating block, and the positions of the first trailer part and the second trailer part are switched by rotating the rotating block; a locking component is provided between the rotating block and the second arm body, and the locking component is used to lock / unlock the rotating block and the second arm body.

[0013] Compared with the prior art, the trailer arm with a screw adjustment mechanism in the utility model, by providing matching screws and slide grooves, allows the first arm body and the second arm body to slide up and down, thereby adjusting the height of the second arm body to adapt to towed vehicles of different heights. The structure is simple, and the drive part is provided to facilitate the user to rotate the screw, which is more convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a trailer arm according to an embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of a trailer arm of an embodiment of the utility model from another angle;

[0016] Figure 3 It is a partial structural schematic diagram of a trailer arm according to an embodiment of the utility model;

[0017] Figure 4 for Figure 1 A cross-sectional view of

[0018] Figure 5 It is a structural diagram of the second arm body of an embodiment of the utility model;

[0019] Figure 6 Another angle structural diagram of the second arm body of the embodiment of the utility model;

[0020] Figure 7 It is a schematic diagram of the combination of the positioning pin, the locking pin and the lock sleeve of an embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1. first arm body; 11. slide groove; 12. first through hole; 13. connecting part; 2. second arm body; 21. through groove; 22. slider; 23. mounting cavity; 24. second through hole; 25. fourth through hole; 26. mounting groove; 27. locking groove; 3. screw rod; 31. driving part; 311. rotating groove; 32. handle; 4. locking sleeve; 41. locking block; 411. keyhole; 5. rotating block; 51. third through hole; 52. mounting part; 53. first trailer ball head; 54. second trailer ball head; 55. third trailer ball head; 56. trailer ring; 6. positioning pin; 7. locking pin. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] The terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The drawings of the embodiments of the present utility model are provided with a coordinate system XYZ, wherein the positive direction of the X-axis represents the left, the reverse direction of the X-axis represents the right, the positive direction of the Y-axis represents the front, the reverse direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the reverse direction of the Z-axis represents the bottom.

[0026] The utility model embodiment provides a trailer arm with a screw adjustment mechanism, combined with Figure 1-7 As shown, the trailer arm includes a first arm body 1 and a second arm body 2 slidably connected to the first arm body 1, the first arm body 1 is provided with a circumferentially rotating screw 3, the axis of the screw 3 is perpendicular to the horizontal plane, the second arm body 2 is provided with a through groove 21 threadedly connected to the screw 3, the upper end of the screw 3 is provided with a driving part 31 for driving the screw 3 to rotate, the driving part 31 is rotated by external force, and the driving part 31 drives the screw 3 to rotate circumferentially, so that the second arm body 2 moves up and down along the screw 3.

[0027] like Figure 1As shown, the through slot 21 is vertically penetrated inside the second arm 2 , and the screw rod 3 passes through the through slot 21 . When the screw rod 3 is rotated by external force, the through slot 21 moves up and down along the screw rod 3 under the action of the thread.

[0028] When the screw rod 3 rotates in a first direction, the second arm body 2 moves upward, and when the screw rod 3 rotates in a second direction, the second arm body 2 moves downward. The first direction is a clockwise direction or a counterclockwise direction, and the second direction is a direction opposite to the first direction.

[0029] By providing matching screw rods 3 and slide grooves 11, the first arm body 1 and the second arm body 2 can slide up and down, so as to adjust the height of the second arm body 2 to adapt to towed vehicles of different heights. The structure is simple, and the drive unit 31 is provided to facilitate the user to rotate the screw rod 3, which is more convenient and labor-saving.

[0030] The driving part 31 includes a handle 32 , and the handle 32 is rotated by an external force to drive the screw rod 3 to rotate.

[0031] like Figure 2 As shown, in this embodiment, the upper and lower ends of the first arm body 1 are detachably provided with connecting parts 13, and the upper and lower ends of the screw rod 3 are circumferentially rotatably connected to the connecting parts 13, so that the screw rod 3 only rotates circumferentially without displacement in the up and down directions.

[0032] The handle 32 can increase the torque so that the user can save more effort when rotating the screw rod 3. In this embodiment, the handle 32 is L-shaped, and one end is facing upward, so that the user can drive the screw rod 3 to rotate through the handle 32 to move the second arm body 2 up and down.

[0033] Further, the driving part 31 is provided with a rotation groove 311, and the opening of the rotation groove 311 is upward, and the user can insert the rotation groove 311 through a suitable screwdriver (not shown) to drive the driving part 31 to rotate. The shape of the rotation groove 311 can be a square or a cross shape. In the present embodiment, the rotation groove 311 is square, and the screwdriver is a screwdriver with a square shaft, and the square shaft is adapted to the rotation groove 311, and the upper end of the screwdriver is provided with a handle that is easy to rotate. When the handle 32 on the driving part 31 is damaged or broken, the user can cooperate with the rotation groove 311 through the screwdriver, thereby rotating the driving part 31.

[0034] In other embodiments, the driving part 31 may be a motor, which drives the screw rod 3 to rotate.

[0035] The first arm body 1 is provided with a slide groove 11 along the vertical direction, and the second arm body 2 is provided with a slider 22 adapted to the slide groove 11 , and the slider 22 slides up and down in the slide groove 11 .

[0036] like Figure 1 and2 As shown, in this embodiment, the slide groove 11 and the slider 22 cooperate to make the sliding connection between the first arm body 1 and the second arm body 2 smoother and more stable, and not easy to fall out. The upper and lower ends of the slide groove 11 are connected, and because the connecting portion 13 is fixed to the first arm body 1 by bolts, the second arm body 2 can be installed or removed from the upper and lower ends of the first arm body 1, thereby saving space and facilitating transportation.

[0037] The second arm body 2 is provided with two sliders 22 , the first arm body 1 is provided with two slide grooves 11 , the two sliders 22 are arranged opposite to each other and form a mounting cavity 23 with an opening on the second arm body 2 , and the first arm body 1 is slidably connected to the mounting cavity 23 .

[0038] like Figure 1 and 6 As shown, in this embodiment, two slide grooves 11 are respectively arranged on the left and right sides of the first arm body 1, and the two sliders 22 correspond to the positions of the two slide grooves 11. When the slider 22 is slidably connected with the slide groove 11, the first arm body 1 is slidably connected with the mounting cavity 23, and then through the cooperation of the left and right sides, the sliding connection between the first arm body 1 and the second arm body 2 is smoother and more stable.

[0039] The first arm body 1 is provided with a plurality of first through holes 12 along the vertical direction, and the second arm body 2 is provided with second through holes 24 corresponding to the first through holes 12 . Removable positioning pins 6 are inserted into the first through holes 12 and the second through holes 24 .

[0040] When the positioning pin 6 is inserted into the first through hole 12 and the second through hole 24 at the same time, the first arm body 1 and the second arm body 2 are locked, and the second arm body 2 cannot move up and down; when the positioning pin 6 is pulled out of the first through hole 12 and the second through hole 24, the first arm body 1 and the second arm body 2 are locked and unlocked, and the second arm body 2 can move up and down.

[0041] like Figure 3 As shown, a plurality of first through holes 12 are evenly distributed on the slide slot 11 along the vertical direction. In this embodiment, the first through holes 12 and the second through holes 24 are both circular, and the positioning pin 6 is a columnar structure. The first through holes 12 are arranged on the first arm body 1 from left to right. There are 7 first through holes 12, that is, there are seven height gears, and the user can fix the second arm body 2 at a suitable gear according to needs.

[0042] Through the cooperation of the first through hole 12, the second through hole 24 and the positioning pin 6, the connection between the second arm body 2 and the first arm body 1 in the up and down direction is more stable, the bearing pressure between the screw rod 3 and the through groove 21 is reduced, and the structure is more stable.

[0043] One end of the second arm body 2 away from the first arm body 1 is rotatably connected to a rotating block 5 , the rotating block 5 is provided with a third through hole 51 , the second arm body 2 is provided with a fourth through hole 25 , and a detachable locking pin 7 is inserted in the rotating block 5 and the second arm body 2 .

[0044] like Figure 3 and 4 As shown, when the locking pin 7 is inserted into the third through hole 51 and the fourth through hole 25 at the same time, the rotating block 5 is locked with the second arm body 2, and the rotating block 5 cannot rotate at this time; when the locking pin 7 is pulled out of the third through hole 51 and the fourth through hole 25, the rotating block 5 is locked and unlocked with the second arm body 2, and the rotating block 5 can rotate at this time.

[0045] In this embodiment, the third through hole 51 and the fourth through hole 25 are both circular, and the locking pin 7 is a columnar structure. Through the cooperation of the third through hole 51, the fourth through hole 25 and the locking pin 7, the connection between the second arm 2 and the rotating block 5 is more stable to prevent slipping out.

[0046] The rotating block 5 includes a mounting portion 52 . The second arm body 2 is provided with a mounting groove 26 matched with the mounting portion 52 . The mounting portion 52 can be rotatably installed in the mounting groove 26 . The third through hole 51 is provided on the mounting portion 52 .

[0047] like Figure 3 As shown, in this embodiment, the mounting portion 52 is disposed on one side of the rotating block 5 close to the second arm 2, and the mounting portion 52 is cylindrical, and the mounting portion 52 is welded or integrally connected to the rotating block 5. The mounting groove 26 is a circular groove, and the mounting portion 52 can rotate 360 ​​degrees in the mounting groove 26 to switch to use different trailer parts.

[0048] The screw adjustment mechanism further includes a locking sleeve 4, an end of the positioning pin 6 is fixedly connected to the locking sleeve 4, an end of the locking pin 7 is fixedly connected to the locking sleeve 4, and the locking sleeve 4 is used to lock / unlock the positioning pin 6 and the locking pin 7.

[0049] like Figure 3 As shown, in this embodiment, the positioning pin 6 and the locking pin 7 are welded or integrally formed with the locking sleeve 4. The positioning pin 6 is inserted between the first arm body 1 and the second arm body 2. When the locking sleeve 4 is locked, the position of the positioning pin 6 is fixed to prevent the positioning pin 6 from being dislodged due to shaking during the operation of the trailer arm, thereby causing the danger of the first arm body 1 and the second arm body 2 being separated from each other.

[0050] The locking pin 7 is inserted between the rotating block 5 and the second arm body 2. When the locking sleeve 4 is locked, the position of the locking pin 7 is fixed to prevent the locking pin 7 from falling out due to shaking on the road when the trailer arm is working, thereby causing the danger of the rotating block 5 and the second arm body 2 being separated from each other.

[0051] The second arm body 2 is provided with a locking groove 27 , and the locking sleeve 4 is provided with a locking block 41 . The locking groove 27 and the locking block 41 cooperate with each other so that the second arm body 2 and the locking sleeve 4 are detachably connected.

[0052] like Figure 7 As shown, in this embodiment, after the locking sleeve 4 is removed, the vertical height between the second arm body 2 and the first arm body 1 and the rotation angle between the second arm body 2 and the rotating block 5 can be adjusted simultaneously.

[0053] The lock block 41 is provided with a through keyhole 411 , and the user inserts a key into the keyhole 411 and rotates the lock block 41 to lock / unlock the second arm 2 and the lock sleeve 4 , thereby improving the anti-theft performance.

[0054] The side end of the second arm body 2 is rotatably connected with a rotating block 5, and the rotating block 5 has a rotating axis when rotating. The first trailer part and the second trailer part for trailers are fixedly arranged on the rotating block 5, and the first trailer part and the second trailer part are distributed in a ring around the rotating axis of the rotating block 5. The positions of the first trailer part and the second trailer part are switched by rotating the rotating block 5; a locking component is provided between the rotating block 5 and the second arm body 2, and the locking component is used to lock / unlock the rotating block 5 and the second arm body 2.

[0055] The rotating block 5 is provided with trailer parts, which are generally trailer ball heads, trailer rings 56, trailer hooks and other trailer parts.

[0056] like Figure 1 and 2 As shown, in this embodiment, the locking components are the third through hole 51 , the fourth through hole 25 and the locking pin 7 .

[0057] The first trailer component is a first trailer ball head 53 , and the second trailer component is a second trailer ball head 54 having a size different from that of the first trailer component.

[0058] The rotating block 5 is provided with a third trailer part for trailer, and the first trailer part, the second trailer part and the third trailer part are distributed in a ring around the rotating axis of the rotating block 5. The third trailer part is: a third trailer ball head 55 which is different in size from the first trailer part and the second trailer part.

[0059] A fourth trailer component for trailer is fixedly arranged on the rotating block 5 , and the first trailer component, the second trailer component, the third trailer component and the fourth trailer component are distributed in a ring around the rotating axis of the rotating block 5 . The fourth trailer component is a trailer ring 56 .

[0060] When only the first and second trailer parts that are symmetrical in vertical direction are provided, the third through hole 51 is provided with one, and the rotating block 5 switches with a unit switching angle of 180 degrees; when three or four trailer parts are provided, the third through holes 51 are provided with two vertically distributed, and the rotating block 5 switches with a unit switching angle of 90 degrees.

[0061] In this embodiment, four different trailer parts are provided on the rotating block 5, and each trailer part is switched with a switching angle of 90 degrees as a unit. By providing a plurality of different trailer parts, the functions are diversified, and different trailer parts do not need to be disassembled and replaced, and different trailer parts can be switched by rotation, which is convenient to operate, saving time and effort.

[0062] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A trailer arm with a screw adjustment mechanism, characterized in that: The trailer arm comprises a first arm body (1) and a second arm body (2) slidably connected to the first arm body (1); the first arm body (1) is provided with a circumferentially rotating screw rod (3), the axis of the screw rod (3) is perpendicular to a horizontal plane; the second arm body (2) is provided with a through groove (21) threadedly connected to the screw rod (3); the upper end of the screw rod (3) is provided with a driving part (31) for driving the screw rod to rotate; the driving part (31) is rotated by an external force, and the driving part (31) drives the screw rod (3) to rotate circumferentially, so that the second arm body (2) moves up and down along the screw rod (3).

2. The trailer arm with a screw adjustment mechanism according to claim 1, characterized in that: The driving part (31) comprises a handle (32), and the handle (32) is rotated by external force to drive the screw rod (3) to rotate.

3. The trailer arm with a screw adjustment mechanism according to claim 1, characterized in that: The first arm body (1) is provided with a slide groove (11) in the vertical direction, and the second arm body (2) is provided with a sliding block (22) adapted to the slide groove (11), and the sliding block (22) slides up and down in the slide groove (11).

4. The trailer arm with a screw adjustment mechanism according to claim 3, characterized in that: The second arm body (2) is provided with two sliding blocks (22), the first arm body (1) is provided with two sliding grooves (11), the two sliding blocks (22) are arranged opposite to each other and form a mounting cavity (23) with an opening on the second arm body (2), and the first arm body (1) is slidably connected to the mounting cavity (23).

5. The trailer arm with a screw adjustment mechanism according to claim 1, characterized in that: The first arm body (1) is provided with a plurality of first through holes (12) along the vertical direction, the second arm body (2) is provided with second through holes (24) corresponding to the first through holes (12), and detachable positioning pins (6) are inserted into the first through holes (12) and the second through holes (24).

6. The trailer arm with a screw adjustment mechanism according to claim 5, characterized in that: One end of the second arm body (2) away from the first arm body (1) is rotatably connected to a rotating block (5); a third through hole (51) is provided on the rotating block (5); a fourth through hole (25) is provided on the second arm body (2); and a detachable locking pin (7) is inserted into the rotating block (5) and the second arm body (2).

7. The trailer arm with a screw adjustment mechanism according to claim 6, characterized in that: The rotating block (5) comprises a mounting portion (52); a mounting groove (26) matching the mounting portion (52) is provided on the second arm body (2); the mounting portion (52) can be rotatably mounted in the mounting groove (26); and the third through hole (51) is provided on the mounting portion (52).

8. The trailer arm with a screw adjustment mechanism according to claim 6, characterized in that: It also comprises a locking sleeve (4), the end of the positioning pin (6) is fixedly connected to the locking sleeve (4), the end of the locking pin (7) is fixedly connected to the locking sleeve (4), and the locking sleeve (4) is used to lock / unlock the positioning pin (6) and the locking pin (7).

9. The trailer arm with a screw adjustment mechanism according to claim 8, characterized in that: The second arm body (2) is provided with a locking groove (27), and the locking sleeve (4) is provided with a locking block (41); the locking groove (27) and the locking block (41) cooperate with each other so that the second arm body (2) and the locking sleeve (4) are detachably connected.

10. The trailer arm with a screw adjustment mechanism according to any one of claims 1 to 9, characterized in that: The side end of the second arm (2) is rotatably connected to a rotating block (5), the rotating block (5) having a rotating axis when rotating, a first trailer part and a second trailer part for trailers being fixedly arranged on the rotating block (5), the first trailer part and the second trailer part being distributed in a ring around the rotating axis of the rotating block (5), and the positions of the first trailer part and the second trailer part being switched by the rotation of the rotating block (5); a locking component is arranged between the rotating block (5) and the second arm (2), the locking component being used to lock / unlock the rotating block (5) and the second arm (2).

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