Trailer arm and motor home thereof
By introducing a height clamping mechanism, length clamping mechanism and synchronous adjustment mechanism into the trailer arm, multi-point positioning and telescopic adjustment between the trailer arm and the car chassis is achieved, which solves the problem of mismatch in the size of the trailer arm and improves adaptability and use Convenience.
Patent Information
- Application Number
- CN202411732645.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-01-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing trailer arms are not equal to the chassis distance of the trailer bars of different trailers, which makes the trailer arms unable to be installed normally, making the problem of mismatch in sizes more inconvenient.
A trailer arm including a mounting plate, a fixed arm, a telescopic arm and a control device is designed. Through a height clamping mechanism, a length clamping mechanism and a synchronous adjustment mechanism, a multi-point positioning and telescopic adjustment between the trailer arm and the automobile chassis are realized. , ensure the adaptability of the trailer arm.
It effectively solves the problem of inadequate distance between the tow arm and the car chassis, improves the adaptability and convenience of the tow arm, and prevents positioning failure.
Smart Images
Figure CN119283544A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field related to trailer arms, and in particular to a trailer arm and a recreational vehicle thereof. Background Art
[0002] The trailer arm is a car trailer accessory. By installing one end of the trailer arm inside the standard quick-insert square port of the car chassis trailer bar, and connecting the part with the towing hanger at the other end to the rope loop, the trailer can tow a faulty vehicle or other towed items. It is mainly used to connect and tow trailers, faulty motor vehicles, and other towed items.
[0003] During long-term observation and use, it was found that the existing trailer arm is usually integrated, and the distance between the trailer bar and the chassis of different trailers is not equal. Therefore, when installing the trailer arm with other vehicles that need to be towed, size mismatch is likely to occur, resulting in the trailer arm being unable to be installed normally, which is quite inconvenient. Summary of the Invention
[0004] The object of the present invention is to provide a trailer arm and a recreational vehicle thereof to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a trailer arm, comprising a mounting plate, an outer wall of which is fixedly connected to a mounting bracket; The mounting frame is provided with a fixed arm inside, a telescopic arm is slidably provided inside the fixed arm, the top and bottom ends of the telescopic arm are fixedly connected to a tow ball, and a control device is provided on the fixed arm, and the control device includes: A height clamping mechanism is provided inside the fixed arm and is used for multi-point positioning of the height of the fixed arm; A length clamping mechanism is provided between the fixed arm and the telescopic arm and is used for multi-point positioning of the extension length of the telescopic arm; A synchronous adjustment mechanism is provided at the top end of the fixed arm and is used to control the height clamping mechanism and the length clamping mechanism.
[0006] Preferably, the height clamping mechanism includes: A clamping rod, wherein the outer wall of the mounting frame is provided with a plurality of through holes at equal intervals, and one end of the fixed arm is provided with a clamping groove, and the clamping rod passes through the through hole and is slidably connected with the inner cavity of the clamping groove, and the cross-sections of the through hole and the clamping groove are both square; A positioning rod, wherein a positioning groove is provided on one side of the inner wall of the clamping groove, a positioning hole is provided on the outer wall of the clamping rod, one end of the positioning rod is slidably inserted and connected with the inner cavity of the positioning groove, and the other end of the positioning rod is slidably inserted and connected with the inner cavity of the positioning hole; Slide blocks, both sides of the inner wall of the positioning groove are provided with slide blocks, and the plurality of slide blocks are respectively fixedly connected to the two sides of the positioning rod, and the plurality of slide blocks are respectively slidably connected with the inner cavities of the plurality of slide blocks; A first compression spring, wherein the plurality of first compression springs are respectively located inside the plurality of sliding grooves.
[0007] Preferably, one end of the first compression spring is fixedly connected to the inner wall of the sliding groove, and the other end of the first compression spring is fixedly connected to the slider.
[0008] Preferably, the height clamping mechanism further includes: A pull rod is fixedly connected to the top end of the positioning rod. A pull groove is provided on the top end of the fixed arm. The pull rod is slidably inserted into the inner cavity of the pull groove.
[0009] Preferably, the length clamping mechanism includes: a sliding plate, the sliding plate being sleeved on the outside of the fixed arm, the cross section of the sliding plate being C-shaped; A limiting rod, wherein a plurality of the limiting rods are fixedly connected to one side of the sliding plate; A positioning pin, a plurality of engaging holes are equidistantly provided on both sides of the telescopic arm, the positioning pin passes through the fixed arm and is slidably connected with the inner cavity of the engaging hole, a limiting hole is provided on the outer wall of the positioning pin, and the limiting rod is slidably connected with the inner cavity of the limiting hole; Sliding blocks, both sides of the fixed arm are provided with sliding grooves, and the plurality of sliding blocks are respectively fixedly connected to the two sides of the inner wall of the sliding plate, and the plurality of sliding blocks are respectively slidably connected with the inner cavities of the plurality of sliding grooves; A second compression spring is located inside the sliding slot.
[0010] Preferably, one end of the second compression spring is fixedly connected to the sliding block, and the other end of the second compression spring is fixedly connected to the inner wall of the sliding groove.
[0011] Preferably, the synchronization adjustment mechanism includes: A turntable rotatably disposed on the top of the fixed arm; Extrusion blocks, a plurality of which are fixedly connected to the outer wall of the turntable, and the extrusion blocks cooperate with the pull rod and the sliding plate; The clamping assembly is arranged inside the turntable.
[0012] Preferably, the clamping assembly includes: A sliding rod, wherein a groove is formed at the top of the turntable, and both ends of the sliding rod are fixedly connected to the inner wall of the groove; Pull plates, wherein the plurality of pull plates are all connected to the slide rod in a sliding manner, and an annular groove is provided on the top of the fixed arm, and the plurality of pull plates are all connected to the inner cavity of the annular groove in a sliding manner; A clamping block, wherein the plurality of clamping blocks are respectively fixedly connected to the plurality of pull plates, the inner wall of the annular groove is provided with a plurality of clamping grooves at equal intervals, the plurality of clamping grooves are arranged in a ring shape, and the clamping blocks are slidably interlaced with the inner cavity of the clamping grooves; A third compression spring is sleeved on the outside of the slide rod, and two ends of the third compression spring are respectively fixedly connected to the plurality of pull plates.
[0013] Preferably, a rotation groove is provided at the top end of the fixed arm, a rotation block is provided inside the rotation groove, and the rotation block is fixedly connected to the turntable.
[0014] The present invention also provides a motorhome with a trailer arm, which includes the following specific steps: Technical effects and advantages of the present invention: The present invention utilizes a setting mode in which a height clamping mechanism, a length clamping mechanism and a synchronous adjustment mechanism are coordinated. The height clamping mechanism and the length clamping mechanism can be used to adjust the distance between the telescopic arm and the vehicle chassis, thereby reducing the problem of mismatch between the distance between the tow ball on the trailer arm and the vehicle chassis, thereby improving the adaptability of the device. In addition, the setting of the synchronous adjustment mechanism can adjust the height clamping mechanism and the length clamping mechanism at the same time. One of them can be unlocked for adjustment, or both can be unlocked and adjusted at the same time, or both can be limited synchronously to prevent the possibility of positioning failure during use, thereby facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0016] Figure 2 It is a schematic diagram of the overall top view of the structure of the present invention.
[0017] Figure 3 It is a schematic diagram of the internal structure of the present invention from a top view.
[0018] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.
[0019] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B in the middle.
[0020] Figure 6 It is a structural schematic diagram of the synchronous adjustment mechanism of the present invention.
[0021] Figure 7 This is a schematic diagram of the internal structure of the synchronous adjustment mechanism of the present invention from the front.
[0022] Figure 8 This is a schematic diagram of the internal structure of the annular groove of the present invention viewed from above.
[0023] In the figure: 1. Mounting plate; 2. Mounting frame; 3. Fixed arm; 4. Telescopic arm; 5. Drag ball; 6. Height clamping mechanism; 61. Clamping rod; 62. Positioning rod; 63. Sliding block; 64. First compression spring; 65. Pull rod; 7. Length clamping mechanism; 71. Sliding plate; 72. Limiting rod; 73. Positioning pin; 74. Sliding block; 75. Second compression spring; 8. Synchronous adjustment mechanism; 81. Turntable; 82. Extrusion block; 83. Clamping assembly; 831. Sliding rod; 832. Pull plate; 833. Clamping block; 834. Third compression spring; 9. Rotating block. DETAILED DESCRIPTION
[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.
[0025] The present invention provides Figure 1-8 A trailer arm shown includes a mounting plate 1, an outer wall of which is fixedly connected to a mounting frame 2; Furthermore, a fixed arm 3 is provided inside the mounting frame 2, a telescopic arm 4 is provided inside the fixed arm 3 for sliding, the top and bottom ends of the telescopic arm 4 are fixedly connected to a tow ball 5, a control device is provided on the fixed arm 3, the control device includes: a height clamping mechanism 6, a length clamping mechanism 7 and a synchronous adjustment mechanism 8, the height clamping mechanism 6 is provided inside the fixed arm 3, and is used to locate the height of the fixed arm 3 at multiple points; the length clamping mechanism 7 is provided between the fixed arm 3 and the telescopic arm 4, and is used to locate the extended length of the telescopic arm 4 at multiple points; the synchronous adjustment mechanism 8 is provided at the top of the fixed arm 3, and is used to control The height clamping mechanism 6 and the length clamping mechanism 7 can be controlled. The distance between the telescopic arm 4 and the automobile chassis can be adjusted through the height clamping mechanism 6 and the length clamping mechanism 7, reducing the problem of incompatibility between the distance between the towing ball 5 on the trailer arm and the automobile chassis, thereby improving the adaptability of the device. The setting of the synchronous adjustment mechanism 8 can adjust the height clamping mechanism 6 and the length clamping mechanism 7 at the same time, and one of them can be unlocked for adjustment, or both can be unlocked and adjusted at the same time, or both can be limited synchronously to prevent the possibility of positioning failure during use, which is convenient for use.
[0026] Specifically, the height clamping mechanism 6 includes: a clamping rod 61, a positioning rod 62, a slider 63, a first compression spring 64 and a pull rod 65. The outer wall of the mounting frame 2 is equidistantly provided with a plurality of through holes, and one end of the fixed arm 3 is provided with a clamping groove. The clamping rod 61 passes through the through hole and is slidably connected with the inner cavity of the clamping groove. The cross-sections of the through hole and the clamping groove are both square, and the cross-section of the clamping rod 61 is also square, so that it is easy to insert while preventing the fixed arm 3 from rotating, and it is also convenient for the positioning hole opened on the clamping rod 61. It is inserted with the positioning rod 62; a positioning groove is provided on one side of the inner wall of the clamping groove, and a positioning hole is provided on the outer wall of the clamping rod 61. One end of the positioning rod 62 is slidably inserted and connected with the inner cavity of the positioning groove, and the other end of the positioning rod 62 is slidably inserted and connected with the inner cavity of the positioning hole; sliding grooves are provided on both sides of the inner wall of the positioning groove, and multiple sliders 63 are respectively fixedly connected to the two sides of the positioning rod 62, and the multiple sliders 63 are respectively slidably inserted and connected with the inner cavities of multiple sliding grooves; multiple first compression springs 64 are respectively located inside the multiple sliding grooves. One end of the first compression spring 64 is fixedly connected to the inner wall of the slide groove, and the other end of the first compression spring 64 is fixedly connected to the slider 63. The first compression spring 64 is always in a compressed state, so that the slider 63 can always provide a stable elastic force to the positioning rod 62, so that the positioning rod 62 can always be accommodated in the positioning groove without the influence of external force. The pull rod 65 is fixedly connected to the top end of the positioning rod 62, and a pull groove is provided at the top end of the fixed arm 3. The pull rod 65 is slidably connected with the inner cavity of the pull groove. Under the extrusion of the extrusion block 82, the pull rod 65 can drive the positioning rod 62 to extend into the positioning groove and intersperse with the positioning hole opened by the clamping rod 61. When the extrusion block 82 no longer squeezes the pull rod 65, the positioning rod 62 will be re-accommodated in the interior of the positioning groove under the elastic force of the first compression spring 64, so that the clamping rod 61 can be pulled out to adjust the height of the fixed arm 3.
[0027] The lock body 71 is fixed on the locking cam 76, and the locking cam 76 is fixed on the locking cam 76. The lock body 71 is fixed on the locking cam 76, and the locking cam 76 is fixed on the locking cam 76. If locking sill 752 is in the state that stretches out the flywheel 74 of locking sill 71, and lock core 71 is in the state that stretches out the flywheel 74 and lock core 71 is in the state of being firmly fixed on lock core 71, then lock core 71 can be locked in the state of being firmly fixed on lock core 71.
[0028] Specifically, the synchronous adjustment mechanism 8 includes: a turntable 81, an extrusion block 82 and a clamping assembly 83. The turntable 81 is rotatably arranged at the top of the fixed arm 3. A rotation groove is provided at the top of the fixed arm 3. A rotation block 9 is provided inside the rotation groove. The rotation block 9 is fixedly connected to the turntable 81. The turntable 81 can be rotated at the top of the fixed arm 3 at will through the rotation block 9 without falling off. A plurality of extrusion blocks 82 are fixedly connected to the outer wall of the turntable 81. The extrusion blocks 82 cooperate with the pull rod 65 and the sliding plate 71. The number of the extrusion blocks 82 is at least three, and two of them are symmetrically arranged, so that the two extrusion blocks 82 can be symmetrically arranged. The block 82 squeezes the pull rod 65 and the sliding plate 71 at the same time, so that the height clamping mechanism 6 and the length clamping mechanism 7 are fixed at the same time and cannot be adjusted. The pull rod 65 and the sliding plate 71 can also be not squeezed at the same time, so that the height clamping mechanism 6 and the length clamping mechanism 7 can be adjusted at the same time. Another squeezing block 82 can also be used to selectively squeeze one of the pull rod 65 and the sliding plate 71, so that one of the height clamping mechanism 6 and the length clamping mechanism 7 can be fixed and the other can be adjusted. The clamping assembly 83 is arranged inside the turntable 81, and is used to fix the position of the squeezing block 82 on the turntable 81 at multiple points.
[0029] Furthermore, the clamping assembly 83 includes: a slide bar 831, a pull plate 832, a clamping block 833 and a third compression spring 834. A groove is provided at the top of the turntable 81, and both ends of the slide bar 831 are fixedly connected to the inner wall of the groove; multiple pull plates 832 are slidably inserted and connected with the slide bar 831, and an annular groove is provided at the top of the fixed arm 3, and multiple pull plates 832 are slidably inserted and connected with the inner cavity of the annular groove; multiple clamping blocks 833 are respectively fixedly connected with multiple pull plates 832, and the inner wall of the annular groove is equidistantly provided with multiple clamping grooves, and the multiple clamping grooves are arranged in a ring shape, and the clamping block 833 is slidably inserted and connected with the inner cavity of the clamping groove; the third compression spring 834 is sleeved on the outside of the slide bar 831, and both ends of the third compression spring 834 are respectively connected to multiple pull plates 8 32 is fixedly connected, and the third compression spring 834 is always in a compressed state, so that a stable elastic force can be always provided to the clamping block 833 through the pulling plate 832, so that the clamping block 833 can be stably clamped with the clamping slot. When it is necessary to select the extrusion situation of the extrusion block 82 on the pull rod 65 and the sliding plate 71, the pulling plate 832 can be pulled to make the clamping block 833 disengage from the clamping slot, so that the turntable 81 can be rotated to make the extrusion block 82 rotate, so that multiple extrusion blocks 82 can squeeze the pull rod 65 and the sliding plate 71 in different situations, and after they are in the appropriate position, the pulling plate 832 is released, so that under the elastic force of the third compression spring 834, the clamping block 833 can be clamped with the clamping slot at the current position, which is convenient for use.
[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, 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 arm, comprising: A mounting plate (1), wherein an outer wall of the mounting plate (1) is fixedly connected to a mounting frame (2); The invention is characterized in that: a fixed arm (3) is arranged inside the mounting frame (2), a telescopic arm (4) is slidably arranged inside the fixed arm (3), a towing ball (5) is fixedly connected to the top and bottom ends of the telescopic arm (4), and a control device is arranged on the fixed arm (3), and the control device comprises: A height clamping mechanism (6), wherein the height clamping mechanism (6) is arranged inside the fixed arm (3) and is used for multi-point positioning of the height of the fixed arm (3); A length clamping mechanism (7), wherein the length clamping mechanism (7) is arranged between the fixed arm (3) and the telescopic arm (4) and is used for multi-point positioning of the extension length of the telescopic arm (4); A synchronous adjustment mechanism (8) is arranged at the top end of the fixed arm (3) and is used to control the height of the clamping mechanism (6) or the length of the clamping mechanism (7).
2. A trailer arm according to claim 1, characterized in that: The height clamping mechanism (6) comprises: A clamping rod (61), the outer wall of the mounting frame (2) is provided with a plurality of through holes at equal intervals, one end of the fixed arm (3) is provided with a clamping groove, the clamping rod (61) passes through the through hole and is slidably connected with the inner cavity of the clamping groove, and the cross-sections of the through hole and the clamping groove are both square; A positioning rod (62), wherein a positioning groove is formed on one side of the inner wall of the clamping groove, a positioning hole is formed on the outer wall of the clamping rod (61), one end of the positioning rod (62) is slidably inserted into the inner cavity of the positioning groove, and the other end of the positioning rod (62) is slidably inserted into the inner cavity of the positioning hole; Slide blocks (63), both sides of the inner wall of the positioning groove are provided with slide blocks, a plurality of the slide blocks (63) are respectively fixedly connected to the two sides of the positioning rod (62), and the plurality of the slide blocks (63) are respectively slidably connected with the inner cavities of the plurality of slide blocks; A first compression spring (64), wherein a plurality of the first compression springs (64) are respectively located inside a plurality of sliding grooves.
3. A trailer arm according to claim 2, characterized in that: One end of the first compression spring (64) is fixedly connected to the inner wall of the sliding groove, and the other end of the first compression spring (64) is fixedly connected to the sliding block (63).
4. A trailer arm according to claim 2, characterized in that: The height clamping mechanism (6) further comprises: A pull rod (65) is fixedly connected to the top end of the positioning rod (62); a pull groove is provided at the top end of the fixed arm (3); and the pull rod (65) is slidably connected to the inner cavity of the pull groove.
5. The trailer arm according to claim 1, characterized in that: The length clamping mechanism (7) comprises: A sliding plate (71), the sliding plate (71) being sleeved on the outside of the fixed arm (3), and the cross section of the sliding plate (71) being C-shaped; A limiting rod (72), wherein a plurality of the limiting rods (72) are fixedly connected to one side of the sliding plate (71); A positioning pin (73), a plurality of engaging holes are equidistantly provided on both sides of the telescopic arm (4), the positioning pin (73) passes through the fixed arm (3) and is slidably inserted into the inner cavity of the engaging hole, a limiting hole is provided on the outer wall of the positioning pin (73), and the limiting rod (72) is slidably inserted into the inner cavity of the limiting hole; Sliding blocks (74), both sides of the fixed arm (3) are provided with sliding grooves, a plurality of the sliding blocks (74) are respectively fixedly connected to the two sides of the inner wall of the sliding plate (71), and the plurality of the sliding blocks (74) are respectively slidably interlaced with the inner cavities of the plurality of sliding grooves; A second compression spring (75), wherein the second compression spring (75) is located inside the sliding groove.
6. A trailer arm according to claim 5, characterized in that: One end of the second compression spring (75) is fixedly connected to the sliding block (74), and the other end of the second compression spring (75) is fixedly connected to the inner wall of the sliding groove.
7. The trailer arm according to claim 1, characterized in that: The synchronous adjustment mechanism (8) comprises: a rotating disk (81), the rotating disk (81) being rotatably disposed on the top end of the fixed arm (3); An extrusion block (82), wherein a plurality of the extrusion blocks (82) are fixedly connected to the outer wall of the rotating disk (81), and the extrusion blocks (82) cooperate with the pull rod (65) and the sliding plate (71); A clamping assembly (83), wherein the clamping assembly (83) is arranged inside the rotating disk (81).
8. A trailer arm according to claim 7, characterized in that: The clamping assembly (83) comprises: A sliding rod (831), wherein a groove is formed at the top of the rotating disk (81), and both ends of the sliding rod (831) are fixedly connected to the inner wall of the groove; A pull plate (832), wherein a plurality of the pull plates (832) are all connected to the slide rod (831) in a sliding manner, an annular groove is provided at the top end of the fixed arm (3), and the plurality of the pull plates (832) are all connected to the inner cavity of the annular groove in a sliding manner; A clamping block (833), wherein a plurality of the clamping blocks (833) are respectively fixedly connected to a plurality of pull plates (832), a plurality of clamping grooves are equidistantly formed on the inner wall of the annular groove, the plurality of clamping grooves are arranged in an annular shape, and the clamping block (833) is slidably interlaced with the inner cavity of the clamping groove; A third compression spring (834), wherein the third compression spring (834) is sleeved on the outside of the sliding rod (831), and both ends of the third compression spring (834) are respectively fixedly connected to a plurality of pull plates (832).
9. The trailer arm according to claim 7, characterized in that: A rotation groove is provided at the top end of the fixed arm (3), a rotation block (9) is provided inside the rotation groove, and the rotation block (9) is fixedly connected to the rotating disk (81).
10. A motorhome with a trailer arm according to any one of claims 1 to 9, characterized in that: A recreational vehicle, characterized in that the recreational vehicle comprises a trailer arm as described in any one of claims 1-9.