Device for pneumatically controlling rear support of wrecker
The pneumatically controlled rear support device for the tow truck solves the problem of the tow truck tilting due to load imbalance, ensuring vehicle stability and safety and preventing component damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING QICHENGXING TECH CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-05-19
AI Technical Summary
When loading and unloading heavy objects, the load is concentrated at the rear of the vehicle, causing an imbalance in the front and rear axle loads, which can lead to the vehicle tilting up, damaging critical components and posing a safety hazard.
Design a pneumatically controlled rear support device for a wrecker vehicle. The device uses a cylinder to extend footrests to support the rear of the vehicle on the ground, and uses anti-detachment components and angle adjustment components to ensure the stability and reliability of the support.
This effectively prevents the recovery vehicle from tilting up during operation, increases vehicle stability, protects critical components, and reduces safety risks.
Smart Images
Figure CN224256620U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of recovery vehicle technology, and in particular relates to a device for pneumatically controlling the rear support of a recovery vehicle. Background Technology
[0002] As a core piece of equipment in the road traffic rescue system, the tow truck is a specialized engineering vehicle that integrates multiple functions such as lifting, towing, and hoisting. Whenever a traffic accident occurs or a vehicle breaks down, the tow truck can respond quickly and move the broken or accident vehicle. This not only greatly improves road traffic efficiency but also effectively avoids traffic congestion and secondary accidents, thus safeguarding road traffic order.
[0003] However, in actual operations, when loading and unloading heavy objects, the load is concentrated at the rear of the vehicle, disrupting the balance of the front and rear axle loads. This causes the vehicle's center of gravity to shift significantly rearward, resulting in a "nose-up" phenomenon. Once this occurs, critical components of the tow truck, such as the chassis and suspension system, will be subjected to abnormal stress, leading to structural damage and severely shortening the vehicle's lifespan. Furthermore, the nose-up phenomenon poses hidden safety hazards, potentially causing injuries to workers and even serious accidents such as the towed vehicle slipping off the road.
[0004] To address these issues, we provide a pneumatically controlled rear support device for a road clearing vehicle. Utility Model Content
[0005] The purpose of this utility model is to provide a pneumatically controlled rear support device for a wrecker. The lower sleeve is pushed downward along the upper sleeve by a cylinder, so that the foot seat is pressed firmly on the ground to support the rear of the wrecker, thus solving the problem that existing wreckers are prone to tilting up during operation.
[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0007] This utility model is a pneumatically controlled rear support device for a tow truck, including an upper shell and a fixed plate. A rotating shaft is fixedly connected to the inside of the upper shell near the top, and the rotating shaft is rotatably connected to the inside of the fixed plate. A lower shell is movably sleeved inside the upper shell. A connecting pin is fixedly connected to the inside of the lower shell near the bottom. A cylinder is rotatably connected to the outside of the rotating shaft, and the output end of the cylinder is rotatably connected to the outside of the connecting pin. A foot is rotatably connected to the outside of the connecting pin. A first sliding opening is provided on the side of the upper shell. An anti-detachment component is provided on the side of the upper shell to prevent the cylinder from suddenly retracting. An angle adjustment component for fitting the upper shell is provided on the side of the fixed plate away from the upper shell.
[0008] The anti-detachment component includes racks symmetrically arranged on both sides of the first sliding port and limiters fixedly connected to the outside of the lower housing. The limiters are slidably connected to the inside of the first sliding port, and a resetter is installed on the outside of the limiters.
[0009] The present invention is further configured such that the limiter includes a sliding seat fixedly connected to the outside of the lower housing, and the sliding seat is slidably connected to the inside of the first sliding port. The side of the sliding seat opposite to the lower housing has two centrally symmetrical sliding grooves. Limiting blocks are slidably connected inside the two sliding grooves. A spring is fixedly connected between the limiting block and the corresponding sliding groove. A toggle rod is fixedly connected to the top of the two limiting blocks. A cover plate is fixedly connected to the top of the sliding seat. The cover plate has two second sliding ports corresponding to the sliding grooves respectively, and the two toggle rods are slidably connected to the inside of the two second sliding ports respectively.
[0010] The present invention is further configured such that the resetter includes a drive shaft rotatably connected to the center of the sliding seat and a top cover fixedly connected to the side of the cover plate opposite to the sliding seat. The drive shaft is rotatably sleeved at the center of the top cover. An actuating plate located between two actuating levers is fixedly connected to the outside of the drive shaft. The actuating plate is located inside the top cover. A reset motor is fixedly connected to the top of the top cover, and the drive shaft is fixedly connected to the output end of the reset motor.
[0011] The present invention is further configured such that the angle adjustment assembly includes a worm gear fixedly connected to one end of the rotating shaft located on the outside of the fixed plate and an adjustment motor fixedly connected to the outside of the fixed plate. A mounting base is fixedly connected to the outside of the fixed plate, and a worm gear meshing with the worm gear is rotatably connected inside the mounting base, and the worm gear is fixedly connected to the output end of the adjustment motor.
[0012] The present invention is further configured such that the teeth of the rack are right-angled triangles with the inclined plane facing upwards, and the end of the limiting block facing the rack is a wedge shape that meshes with the rack.
[0013] The present invention is further configured such that guide wheels are rotatably connected to the outside of both toggle levers, and the two guide wheels are respectively located on both sides of the toggle plate.
[0014] The present invention is further configured such that the interior of the fixing plate has an arc-shaped groove with the rotating shaft as the center, and the upper sleeve is fixedly connected to the side facing the fixing plate with a T-shaped block slidably connected inside the arc-shaped groove.
[0015] The present invention is further configured such that the foot is in the shape of a gold ingot, and an anti-slip pad is fixedly connected to the bottom of the foot.
[0016] The present invention is further configured such that a protective cover is fixedly connected to the outside of the fixed plate, and the worm and worm wheel are both located inside the protective cover.
[0017] This utility model has the following beneficial effects:
[0018] 1. This utility model uses a starting cylinder, and then the lower sleeve extends downward along the upper sleeve as the cylinder output end extends, finally pressing the foot firmly onto the ground, thereby supporting the rear of the wrecker and preventing it from tilting up when the wrecker bed is overturned, thus increasing the stability of the wrecker.
[0019] 2. This utility model uses two springs to push two limiting blocks into the tooth gaps of the corresponding rack, thereby limiting the retraction of the lower sleeve and preventing damage to the vehicle caused by cylinder retraction failure. Then, by starting the reset motor, the drive shaft is rotated, which in turn drives the actuating plate to rotate clockwise and press the two actuating rods. Subsequently, the two actuating rods pull the two limiting blocks out of the tooth gaps of the rack, thereby releasing the limitation on the lower sleeve and allowing the lower sleeve to retract normally.
[0020] 3. This utility model drives the worm gear to rotate by starting the adjusting motor, and then drives the rotating shaft to rotate through the worm wheel meshing with the worm gear, thereby driving the upper shell to rotate, improving the support effect. In addition, when storing, the upper shell can be lifted to increase the ground clearance and avoid damage from bumps during driving. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a structural schematic diagram of one side of the present invention.
[0023] Figure 2 This is a schematic diagram of the structure on the other side of this utility model.
[0024] Figure 3 This is a schematic diagram of the angle adjustment component of this utility model.
[0025] Figure 4 This is a schematic cross-sectional view of the overall structure of this utility model.
[0026] Figure 5 This is a schematic diagram of the explosion structure of the anti-detachment component of this utility model.
[0027] Figure 6 This is a schematic diagram of the retracted state of the limiting block of this utility model.
[0028] The attached diagram lists the components represented by each number as follows:
[0029] 100. Upper housing; 101. Rotating shaft; 102. First sliding port; 103. T-block; 200. Lower housing; 201. Connecting pin; 300. Cylinder; 400. Foot; 401. Anti-slip pad; 500. Fixing plate; 501. Arc-shaped groove; 600. Anti-detachment component; 601. Rack; 602. Limiter; 602a. Sliding seat; 602b. Sliding groove; 602c. Limiting block; 602d, Spring; 602e, Actuating lever; 602f, Guide wheel; 602g, Cover plate; 602h, Second sliding port; 603, Resetter; 603a, Drive shaft; 603b, Actuating plate; 603c, Top cover; 603d, Reset motor; 700, Angle adjustment assembly; 701, Adjustment motor; 702, Worm gear; 703, Mounting base; 704, Worm; 800, Protective cover. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0031] Example 1
[0032] Please see Figures 1 to 4 This utility model relates to a pneumatically controlled rear support device for a tow truck, comprising an upper housing 100 and a fixing plate 500. A rotating shaft 101 is fixedly connected to the interior of the upper housing 100 near its top end, and the rotating shaft 101 is rotatably connected to the interior of the fixing plate 500. A lower housing 200 is movably sleeved inside the upper housing 100, and a connecting pin 201 is fixedly connected to the interior of the lower housing 200 near its bottom end. A cylinder 300 is rotatably connected to the exterior of the rotating shaft 101, and the output end of the cylinder 300 is rotatably connected to the exterior of the connecting pin 201. The upper sleeve 100 has a first sliding opening 102 on its side and an anti-detachment component 600 for preventing the cylinder 300 from suddenly retracting. The fixing plate 500 has an angle adjustment component 700 for fitting the upper sleeve 100 on its side away from the upper sleeve 100. By installing this utility model at the rear of the wrecker, the rear of the wrecker can be supported, thereby preventing the wrecker from tilting when the wrecker bed is tilted over, and increasing the stability of the wrecker.
[0033] Specifically, the foot 400 is in the shape of a gold ingot, and the bottom of the foot 400 is fixedly connected to an anti-slip pad 401. The anti-slip pad 401 can increase the friction between the foot 400 and the ground, and prevent side slippage when supporting.
[0034] The operation process of this embodiment is as follows: When the truck bed of the wrecker is lifted, the cylinder 300 is started first. Then, the lower sleeve 200 extends downward along the upper sleeve 100 along the output end of the cylinder 300, and finally presses the foot seat 400 firmly on the ground, thereby supporting the rear of the wrecker and preventing it from tilting up when the truck bed is tilted up, thus increasing the stability of the wrecker.
[0035] Example 2
[0036] Please see Figure 1 , Figure 4 , Figure 5 and Figure 6 Based on the first specific embodiment, the anti-detachment component 600 includes a rack 601 symmetrically arranged on both sides of the first sliding port 102 and a limiter 602 fixedly connected to the outside of the lower housing 200. The limiter 602 is slidably connected to the inside of the first sliding port 102, and a resetter 603 is installed on the outside of the limiter 602.
[0037] Specifically, the limiter 602 includes a sliding seat 602a fixedly connected to the outside of the lower housing 200, and the sliding seat 602a is slidably connected to the inside of the first sliding opening 102. Two centrally symmetrical sliding grooves 602b are formed on the side of the sliding seat 602a facing away from the lower housing 200. Limiting blocks 602c are slidably connected inside each of the two sliding grooves 602b. A spring 602d is fixedly connected between the limiting block 602c and the corresponding sliding groove 602b. A lever is fixedly connected to the top of each of the two limiting blocks 602c. The top of the moving rod 602e and the sliding seat 602a is fixedly connected to a cover plate 602g. The cover plate 602g has two second sliding openings 602h that correspond to the sliding groove 602b respectively. The two moving rods 602e are slidably connected to the inside of the two second sliding openings 602h respectively. The two limiting blocks 602c are respectively engaged in the tooth gaps of the corresponding rack 601 by two springs 602d, which can limit the retraction of the lower sleeve 200 and thus prevent the cylinder 300 from retracting due to malfunction and causing damage to the vehicle.
[0038] The resetter 603 includes a drive shaft 603a rotatably connected to the center of the sliding seat 602a and a top cover 603c fixedly connected to the side of the cover plate 602g facing away from the sliding seat 602a. The drive shaft 603a is rotatably sleeved at the center of the top cover 603c. An actuating plate 603b located between two actuating rods 602e is fixedly connected to the outside of the drive shaft 603a. The actuating plate 603b is located inside the top cover 603c. A reset motor 603d is fixedly connected to the top of the top cover 603c. The drive shaft 603a is fixedly connected to the output end of the reset motor 603d. By rotating the actuating plate 603b clockwise and pressing the actuating rods 602e, the two limiting blocks 602c can be pulled out from the tooth gap of the rack 601, thereby releasing the limitation on the lower sleeve 200 and allowing the lower sleeve 200 to retract normally.
[0039] Furthermore, the teeth of the rack 601 are right-angled triangles with the inclined plane facing upwards, and the end of the limiting block 602c facing the rack 601 is a wedge shape that meshes with the rack 601;
[0040] Both levers 602e are rotatably connected to guide wheels 602f, and the two guide wheels 602f are located on both sides of the lever plate 603b.
[0041] The operation process of this embodiment is as follows: During the extension of the lower sleeve 200, under the push of the two springs 602d, the two limiting blocks 602c respectively engage with the tooth gaps of the corresponding rack 601, thereby restricting the retraction of the lower sleeve 200 and preventing the cylinder 300 from retracting due to malfunction and causing vehicle damage. Then, by starting the reset motor 603d, the drive shaft 603a is driven to rotate, which in turn drives the actuating plate 603b to rotate clockwise and press the two actuating rods 602e. Subsequently, the two actuating rods 602e respectively pull the two limiting blocks 602c out of the tooth gaps of the rack 601, thereby releasing the restriction on the lower sleeve 200 and allowing the lower sleeve 200 to retract normally.
[0042] Example 3
[0043] Please see Figure 2 and Figure 3Based on specific embodiments one and two, the angle adjustment component 700 includes a worm gear 702 fixedly connected to one end of the rotating shaft 101 located on the outside of the fixed plate 500 and an adjustment motor 701 fixedly connected to the outside of the fixed plate 500. A mounting base 703 is fixedly connected to the outside of the fixed plate 500. A worm 704 meshing with the worm gear 702 is rotatably connected inside the mounting base 703. The worm 704 is fixedly connected to the output end of the adjustment motor 701. By driving the worm 704 to rotate through the adjustment motor 701, the rotating shaft 101 can be rotated through the worm gear 702. This allows adjustment of the angle between the upper housing 100 and the ground, improving the support effect. Furthermore, when storing, the upper housing 100 can be lifted to increase the ground clearance and prevent damage from bumps during driving.
[0044] Specifically, the fixed plate 500 has an arc-shaped groove 501 with the rotating shaft 101 as the center. The upper sleeve 100 is fixedly connected to the side facing the fixed plate 500 with a T-shaped block 103 that is slidably connected inside the arc-shaped groove 501. By sliding the T-shaped block 103 inside the arc-shaped groove 501, the stability of the rotation of the upper sleeve 100 can be enhanced.
[0045] Furthermore, a protective cover 800 is fixedly connected to the outside of the fixed plate 500, and both the worm 704 and the worm wheel 702 are located inside the protective cover 800.
[0046] The operation process of this embodiment is as follows: When it is necessary to adjust the angle between the upper cover 100 and the ground, the worm gear 704 is first driven to rotate by starting the adjustment motor 701. Then, the rotating shaft 101 is driven to rotate by the worm wheel 702 meshing with the worm gear 704, thereby driving the upper cover 100 to rotate, improving the support effect. In addition, when storing, the upper cover 100 can be lifted to increase the ground clearance and avoid collision damage during driving.
[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.
Claims
1. A device for aerodynamic control of the rear support of a wrecker, comprising an upper sleeve (100) and a fixed plate (500); characterized in that: A rotating shaft (101) is fixedly connected to the interior of the upper housing (100) near its top end, and the rotating shaft (101) is rotatably connected to the interior of the fixed plate (500). A lower housing (200) is movably sleeved inside the upper housing (100), and a connecting pin (201) is fixedly connected to the interior of the lower housing (200) near its bottom end. A cylinder (300) is rotatably connected to the exterior of the rotating shaft (101), and the output end of the cylinder (300) is rotatably connected to... The connecting pin (201) is rotatably connected to the outside of the connecting pin (201), and a foot (400) is provided on the outside of the connecting pin (201). The upper sleeve (100) has a first sliding port (102) on its side. The upper sleeve (100) is provided with an anti-disengagement component (600) to prevent the cylinder (300) from suddenly retracting. The fixing plate (500) is provided with an angle adjustment component (700) for fitting the angle of the upper sleeve (100) on the side away from the upper sleeve (100). The anti-detachment component (600) includes a rack (601) symmetrically arranged on both sides of the first sliding port (102) and a limiter (602) fixedly connected to the outside of the lower housing (200). The limiter (602) is slidably connected to the inside of the first sliding port (102), and a resetter (603) is installed on the outside of the limiter (602).
2. The device for aerodynamic control of the rear support of a wrecker according to claim 1, characterized in that, The limiter (602) includes a sliding seat (602a) fixedly connected to the outside of the lower housing (200), and the sliding seat (602a) is slidably connected to the inside of the first sliding port (102). Two centrally symmetrical sliding grooves (602b) are formed on the side of the sliding seat (602a) facing away from the lower housing (200). Limiting blocks (602c) are slidably connected inside both sliding grooves (602b). The limiting blocks (602c) are connected to the corresponding sliding grooves (602a, 602b). 02b) A spring (602d) is fixedly connected between the two internal parts. A toggle rod (602e) is fixedly connected to the top of each of the two limiting blocks (602c). A cover plate (602g) is fixedly connected to the top of the sliding seat (602a). The cover plate (602g) has two second sliding ports (602h) that are respectively corresponding to the sliding groove (602b). The two toggle rods (602e) are slidably connected to the inside of the two second sliding ports (602h).
3. The device for aerodynamic control of the rear support of a wrecker according to claim 2, characterized in that, The resetter (603) includes a drive shaft (603a) rotatably connected to the center of the sliding seat (602a) and a top cover (603c) fixedly connected to the side of the cover plate (602g) facing away from the sliding seat (602a). The drive shaft (603a) is rotatably sleeved at the center of the top cover (603c). An actuating plate (603b) located between two actuating levers (602e) is fixedly connected to the outside of the drive shaft (603a), and the actuating plate (603b) is located inside the top cover (603c). A reset motor (603d) is fixedly connected to the top of the top cover (603c), and the drive shaft (603a) is fixedly connected to the output end of the reset motor (603d).
4. The device for aerodynamic control of the rear support of a wrecker according to claim 1, characterized in that, The angle adjustment assembly (700) includes a worm gear (702) fixedly connected to the rotating shaft (101) at one end of the fixed plate (500) and an adjustment motor (701) fixedly connected to the outside of the fixed plate (500). A mounting base (703) is fixedly connected to the outside of the fixed plate (500). A worm (704) meshing with the worm gear (702) is rotatably connected inside the mounting base (703), and the worm (704) is fixedly connected to the output end of the adjustment motor (701).
5. The device for aerodynamic control of the rear support of a wrecker according to claim 2, characterized in that, The teeth of the rack (601) are right-angled triangles with the inclined plane facing upwards, and the end of the limiting block (602c) facing the rack (601) is a wedge shape that meshes with the rack (601).
6. The device for aerodynamic control of the rear support of a wrecker according to claim 2, characterized in that, Both of the two levers (602e) are rotatably connected to guide wheels (602f), and the two guide wheels (602f) are located on both sides of the lever plate (603b).
7. The device for aerodynamic control of the rear support of a wrecker according to claim 1, characterized in that, The fixed plate (500) has an arc-shaped groove (501) with the rotating shaft (101) as the center. The upper shell (100) is fixedly connected to the side facing the fixed plate (500) with a T-shaped block (103) that is slidably connected inside the arc-shaped groove (501).
8. The device for aerodynamic control of the rear support of a wrecker according to claim 1, characterized in that, The foot (400) is in the shape of a gold ingot, and the bottom of the foot (400) is fixedly connected to an anti-slip pad (401).
9. The device for aerodynamic control of the rear support of a wrecker according to claim 4, characterized in that, A protective cover (800) is fixedly connected to the outside of the fixed plate (500), and the worm (704) and worm wheel (702) are both located inside the protective cover (800).