A wrecker drag arm

Abstract

The utility model discloses a tow arm of wrecker, including first support frame, the first support frame inside sliding connection has first telescopic arm, the tow arm of wrecker still includes fixed subassembly and locking subassembly, the fixed subassembly can fix car tire, the fixed subassembly includes a pair of second support, the side wall on second support is integrally formed with limit support, the second support is slidingly connected with second telescopic arm, the fixed connection of locking support has on second telescopic arm, the locking support is L -shaped, the locking support is fixedly connected in limit support away from second telescopic arm one end, the locking subassembly is used for locking first telescopic arm. Compared with prior art, the utility model discloses a tow arm of wrecker, does not need to replace the calliper when towing the car, can be applicable to the most domestic car on the market, can effectively reduce the use cost of wrecker, does not need staff to lie on the ground and observe the position of car bearing frame when towing the car, is convenient to use.

Description

Technical Field

[0001] This utility model belongs to the technical field of tow arm technology for wreckers, and specifically relates to a tow arm for a wrecker. Background Technology

[0002] With the development of automotive technology, most passenger cars on the road today are automatic front-wheel drive vehicles. When towing this type of car, it is necessary to lift the two front wheels to separate the tires from the ground to prevent damage to the transmission. When a tow truck is working, the calipers on the tow arm are engaged with the load-bearing frame on the front of the car before it is towed.

[0003] In actual use, due to the large number of brands and models of passenger cars, the position and width of the load-bearing frame also vary. When towing, it is necessary to change to a caliper that matches the size of the vehicle's load-bearing frame. Having multiple calipers of different sizes increases the cost of use. Furthermore, when engaging the calipers, the operator needs to lie on the ground to observe the position of the calipers relative to the load-bearing frame, which is very inconvenient.

[0004] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a tow arm for a recovery vehicle.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a tow arm for a recovery vehicle that can solve the above-mentioned problems.

[0007] To achieve the above objectives, a specific embodiment of this utility model provides a tow arm for a recovery vehicle, including a first support frame, in which a first telescopic arm is slidably connected. The tow arm for the recovery vehicle also includes a fixing component and a locking component. The fixing component can fix a vehicle tire. The fixing component includes a pair of second brackets. A limit frame is integrally formed on the side wall of the second bracket. A second telescopic arm is slidably connected to the second bracket. A locking frame is fixedly connected to the second telescopic arm. The locking frame is L-shaped, and the end of the locking frame away from the second telescopic arm is fixedly connected to the limit frame.

[0008] The locking assembly is used to lock the first telescopic arm.

[0009] In one or more embodiments of this utility model, the end of the limiting frame away from the second bracket is provided with a slot, and the end of the locking frame away from the second telescopic arm is engaged in the slot.

[0010] In one or more embodiments of this utility model, a long bolt is threaded onto the locking frame, the long bolt penetrates the locking frame, and the bottom wall of the slot is provided with a groove matching the long bolt.

[0011] In one or more embodiments of this utility model, the second telescopic arm is covered with a first rubber pad, and the locking frame is covered with a second rubber pad.

[0012] In one or more embodiments of this utility model, a limit ring is fixedly connected to the long bolt.

[0013] In one or more embodiments of the present invention, the locking assembly includes a positioning frame, the positioning frame is integrally formed on a first support frame, a locking pin is inserted into the positioning frame, an end cap is integrally formed on the locking pin, a handle is glued to the end cap, and a first through hole matching the locking pin is provided on the positioning frame.

[0014] In one or more embodiments of this utility model, a reinforcing block is fixedly connected to the first telescopic arm, and the reinforcing block is provided with a third through hole and a fourth through hole that match the positioning frame, wherein there are multiple third through holes.

[0015] In one or more embodiments of this utility model, a hinge column is rotatably connected to the first telescopic arm, and a second through hole matching the hinge column is provided on the first telescopic arm.

[0016] In one or more embodiments of this utility model, a pair of limiting plates are fixedly connected to the hinge column, and a fifth through hole matching the fourth through hole is provided on the limiting plate.

[0017] In one or more embodiments of this utility model, the second bracket is fixedly connected to a pair of limiting plates.

[0018] Compared with the prior art, the tow arm of this utility model for a tow truck does not require the replacement of calipers when towing, and can be used for most passenger cars on the market. It can effectively reduce the operating cost of tow trucks, and does not require staff to lie on the ground to observe the position of the car's load-bearing frame when towing, making it convenient to use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the structure of a tow arm for a recovery vehicle in one embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of a tow arm for a recovery vehicle in one embodiment of the present invention. Figure 2 ;

[0022] Figure 3 for Figure 2 Schematic diagram of the structure at point A;

[0023] Figure 4 for Figure 2 Schematic diagram of the structure at point B;

[0024] Figure 5 This is a schematic diagram of the tire-holding assembly of a tow arm for a wrecker vehicle according to one embodiment of the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the tire-holding assembly of a tow arm for a wrecker vehicle according to one embodiment of the present invention. Figure 2 ;

[0026] Figure 7 This is a cross-sectional view of the tire-holding assembly of a tow arm of a wrecker vehicle according to an embodiment of the present invention.

[0027] Explanation of key figure labels:

[0028] 1. Hydraulic cylinder; 2. First support frame; 201. First sliding groove; 202. Second sliding groove; 21. Positioning frame; 2101. First through hole; 22. Locking pin; 221. End cap; 23. Handle; 3. First telescopic arm; 301. Second through hole; 31. Reinforcing block; 3101. Third through hole; 3102. Fourth through hole; 4. Hinge column; 41. Limiting plate; 4101. Fifth through hole; 5. Second bracket; 51. Limiting frame; 5101. Slot; 502. Bolt hole; 6. Second telescopic arm; 61. First rubber pad; 62. Locking frame; 621. Second rubber pad; 622. Long rod bolt; 6221. Limiting ring. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0030] like Figure 1 and Figure 2 As shown, in one embodiment of this utility model, a tow arm for a recovery vehicle includes a first support frame 2, which is welded to a hydraulic cylinder 1. The hydraulic cylinder 1 is fixedly installed on the recovery vehicle and connected to the hydraulic system on the recovery vehicle. When in use, the hydraulic cylinder can control the first support frame 2 to move up and down. This is prior art and will not be described in detail.

[0031] A first telescopic arm 3 is slidably connected inside the first support frame 2. A fixing component is installed on the first telescopic arm 3, which can fix the car tires. When the car needs to be towed, the fixing component fixes the tires, and the hydraulic cylinder 1 lifts the car tires, so that the car can be towed.

[0032] like Figures 2 to 4 As shown, a first sliding groove 201 is provided on the first support frame 2, and the first telescopic arm 3 is slidably connected within the first sliding groove 201. To enhance the strength of the first telescopic arm 3, a reinforcing block 31 is welded onto the first telescopic arm 3, and a second sliding groove 202 matching the reinforcing block 31 is provided on the groove wall of the first sliding groove 201. When towing a car with a long engine compartment, the first telescopic arm 3 extends a considerable length from the first sliding groove 201, resulting in greater stress on the first telescopic arm 3. The reinforcing block 31 strengthens the first telescopic arm 3 and prevents it from bending under stress.

[0033] To lock the first telescopic boom 3 and prevent it from sliding within the first slide groove 201 when the tow truck is in motion, a positioning frame 21 is integrally formed on the first support frame 2. A locking pin 22 is inserted into the positioning frame 21. The positioning frame 21 has a first through hole 2101 that matches the locking pin 22. The reinforcing block 31 has a third through hole 3101 and a fourth through hole 3102 that match the positioning frame 21.

[0034] Specifically, the locking pin 22 passes through the first through hole 2101 on the positioning frame 21 and is inserted into the fourth through hole 3102 to fix the first telescopic arm. In use, first pull the locking pin 22 out of the fourth through hole 3102, then pull out the first telescopic arm 3 so that the third through hole 3101 on the reinforcing block 31 coincides with the position of the first through hole 2101, and then insert the locking pin 22 to lock the first telescopic arm 3 after it has been pulled out.

[0035] Furthermore, an end cap 221 is integrally formed on the locking pin 22, and a handle 23 is glued to the end cap 221. After the locking pin 22 passes through the hydraulic cylinder 1, the handle 23 is magnetically attracted to the positioning frame 21, which limits the locking pin 22 and prevents the locking pin 22 from detaching from the first through hole 2101. The handle 23 glued to the end cap 221 can be easily picked up. Pulling the handle 23 can separate the end cap 221 from the positioning frame 21, thereby facilitating the removal of the locking pin 22 from the first through hole 2101.

[0036] Preferably, there are multiple third through holes 3101, which can facilitate the adjustment of the length of the first telescopic arm 3 when it is pulled out.

[0037] After the first telescopic boom 3 is pulled out, it can keep a certain distance between the front bumper of the car and the tow truck, which can prevent the tow truck and the towed car from scraping each other during towing.

[0038] It is worth noting that the length of the tow truck after connecting to the car is relatively long, requiring a large turning radius, which places high demands on road conditions and makes it inconvenient for use in narrow roads. In order to reduce the turning radius, a hinged column 4 is rotatably connected to the first telescopic arm 3.

[0039] Specifically, a second through hole 301 matching the hinge post 4 is provided at the end of the first telescopic arm 3 away from the first support frame 2. The hinge post 4 passes through the first telescopic arm 3 and is rotatably connected in the second through hole 301 on the first telescopic arm 3. A pair of limiting plates 41 are welded to the two end faces of the hinge post 4. The limiting plates 41 limit the hinge post 4 and prevent it from sliding out of the second through hole 301. The fixing component is welded between the pair of limiting plates 41.

[0040] Specifically, after the fixing component secures the tire, the hydraulic cylinder 1 lifts upward, causing the first support frame 2, the first telescopic arm 3, and the fixing component to lift upward together. At this point, the car tire separates from the ground, allowing the tow truck to tow the car. When passing an intersection, the tow truck turns, and the articulated column 4 rotates within the second through hole 301 on the first telescopic arm 3, reducing the turning radius of the tow truck when towing the car.

[0041] It is worth noting that, since the fixing component is rotatably connected to the first telescopic arm 3 via the hinge post 4, a fifth through hole 4101 matching the positioning frame 21 is provided on the limiting plate 41 to lock the fixing component when not towing a car. Specifically, when the locking pin 22 is inserted into the fifth through hole 4101, the hinge post 4 cannot rotate, thereby locking the fixing component and preventing it from swinging.

[0042] like Figures 4 to 7 As shown, the fixing assembly includes a pair of second brackets 5, which are welded to a pair of limiting plates 41. A limiting frame 51 is integrally formed on the second bracket 5, and a second telescopic arm 6 is slidably connected to the second bracket 5. A locking frame 62 is welded to the second telescopic arm 6. The locking frame 62 is L-shaped, and the end of the locking frame 62 away from the second telescopic arm 6 is inserted into the limiting frame 51. Specifically, a slot 5101 is opened at the end of the limiting frame 51 away from the second bracket 5, and the end of the locking frame 62 away from the second telescopic arm 6 is engaged in the slot 5101.

[0043] To ensure a more secure connection between the locking bracket 62 and the limiting bracket 51, a long bolt 622 is threaded onto the locking bracket 62, penetrating through it. A slot 5102, matching the long bolt 622, is provided on the bottom wall of the slot 5101. Specifically, when the long bolt 622 is tightened, it penetrates the locking bracket 62 and is threaded into the slot 5102.

[0044] Specifically, the length of the locking bracket 62 inserted into the slot 5101 is no less than 22.5cm, making it suitable for cars with tire widths of 17.5cm-22.5cm, satisfying the vast majority of car types on the market. The depth of the slot 5101 is no less than 10cm. When the locking bracket 62 is inserted into the slot 5101, the groove wall of the slot 5101 can support the locking bracket 62, preventing it from bending under weight. The depth of the slot 5101 also allows adjustment of the position of the locking bracket 62 within the slot 5101, facilitating fixation according to different tire widths.

[0045] It is worth noting that, because the end of the locking bracket 62 that inserts into the slot 5101 is relatively long, the locking bracket 62 is hollow to reduce the effort required to tighten the long bolt 622, without compromising its strength. This reduces the number of thread turns between the long bolt 622 and the locking bracket 62 when tightening, thus requiring less effort. Furthermore, a limiting ring 6221 is welded onto the long bolt 622. When tightening the long bolt 622, the limiting ring 6221 can limit the position of the long bolt 622, preventing it from detaching from the side wall of the end of the locking bracket 62 that inserts into the slot 5101.

[0046] Furthermore, the second telescopic arm 6 is covered with a first rubber pad 61, and the locking frame 62 is covered with a second rubber pad 621. The first rubber pad 61 and the second rubber pad 621 can protect the tire and also increase the friction between the tire and the second telescopic arm 6 and the locking frame 62, so that the tire is firmly attached to the second telescopic arm 6 and the locking frame 62.

[0047] When using: First, after adjusting the position of the tow truck and the towed car, turn the long rod bolt 622 to unscrew the long rod bolt 622 from inside 5102, pull the locking bracket 62, and the second telescopic arm 6 can slide out from the second bracket 5. Start the hydraulic cylinder 1 to lower the first support frame 2.

[0048] The second step is to pull the handle 23 to disengage the locking pin 22 from the first through hole 2101, pull the first telescopic arm 3 out from the first support frame 2, and bring the second telescopic arm 6 close to the car tire. When the third through hole 3101 coincides with the position of the first through hole 2101, insert the locking pin 22 to lock the first telescopic arm 3.

[0049] The third step is to push the locking bracket 62 so that it is inserted into the slot 5101, tighten the long rod bolt 622 to fix the tire, and start the hydraulic cylinder 1 to lift it upward. After the car tire is separated from the ground, the car can be towed.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tow arm for a wrecker vehicle, comprising a first support frame, wherein a first telescopic arm is slidably connected within the first support frame, characterized in that, Also includes: A fixing assembly capable of fixing a car tire, the fixing assembly including a pair of second brackets, a limit frame integrally formed on the side wall of the second brackets, a second telescopic arm slidably connected to the second brackets, a locking frame fixedly connected to the second telescopic arm, the locking frame being L-shaped, and the end of the locking frame away from the second telescopic arm being fixedly connected to the limit frame; A locking assembly for locking the first telescopic arm.

2. The tow arm of a recovery vehicle according to claim 1, characterized in that, The limiting frame has a slot at the end away from the second bracket, and the locking frame is engaged in the slot at the end away from the second telescopic arm.

3. The tow arm of a recovery vehicle according to claim 2, characterized in that, The locking frame is threaded with a long bolt, which penetrates the locking frame. The bottom wall of the slot is provided with a groove that matches the long bolt.

4. The tow arm of a recovery vehicle according to claim 3, characterized in that, The second telescopic arm is covered with a first rubber pad, and the locking frame is covered with a second rubber pad.

5. A tow arm for a recovery vehicle according to claim 3, characterized in that, A limit ring is fixedly connected to the long bolt.

6. The tow arm of a recovery vehicle according to claim 1, characterized in that, The locking assembly includes a positioning frame integrally formed on a first support frame. A locking pin is inserted into the positioning frame. An end cap is integrally formed on the locking pin. A handle is glued to the end cap. A first through hole matching the locking pin is provided on the positioning frame.

7. A tow arm for a recovery vehicle according to claim 5, characterized in that, A reinforcing block is fixedly connected to the first telescopic arm. The reinforcing block has a third through hole and a fourth through hole that match the positioning frame. There are multiple third through holes.

8. A tow arm for a recovery vehicle according to claim 6, characterized in that, The first telescopic arm is rotatably connected to a hinge column, and the first telescopic arm has a second through hole that matches the hinge column.

9. A tow arm for a recovery vehicle according to claim 8, characterized in that, A pair of limiting plates are fixedly connected to the hinged column, and a fifth through hole matching the fourth through hole is provided on the limiting plate.

10. A tow arm for a recovery vehicle according to claim 9, characterized in that, The second bracket is fixedly connected to a pair of limiting plates.

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