Carriage expansion prevention device
By designing the anti-swell box device of the car, the limit pin shaft and locking rod structure are used to solve the problem of box plate bulging and limiting, achieving stable transportation and convenient unloading of box plates, improving safety and operating efficiency.
Patent Information
- Application Number
- CN202422790140.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-11-15
AI Technical Summary
The existing car box plates are prone to bulging during transportation, which leads to deformation and inability to lock, affecting loading and unloading. The existing limiting device is difficult to easily remove when fully loaded or deformed, affecting safety and operating efficiency.
A carriage anti-swell box device is designed, including an external fixed seat and a rotatable limit pin shaft. The lateral limit and support of the box plate are realized through the projection and sliding hole structure, and the tightening force is adjusted through the locking rod to facilitate unloading operation.
Effectively prevent the box plate from rising, ensure stability during transportation, and easily open the box plate for unloading when needed, improving safety and operation convenience.
Smart Images
Figure CN223253097U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a carriage accessory, in particular to a carriage anti-expansion device. Background Art
[0002] When transporting materials with a semi-trailer or an ordinary flatbed truck, especially when transporting bulk cargo, the side panels of the box panels of the vehicle compartment often bulge outward. Since the box panels need to be opened sideways or flipped up and down, hinges can only be set on one connecting edge, especially at the corners of the box panels. When subjected to bumpy impact loads during driving, the bulging effect is more obvious. In severe cases, the bulging phenomenon not only reduces the service life of the cargo box, but also causes the box panels to deform, making it impossible to lock and load materials. At the same time, material leakage will occur during material transportation, which will seriously affect driving safety and may even cause safety accidents. The current limit device adopts a vertically pulled or detached structure. When the cargo compartment is fully loaded or when the cargo compartment is deformed, it has a large clamping force on the vertically pulled limiter, resulting in the inability to easily remove the limiter when parked. The limiter and the box panel are stuck, and the box panel cannot be manually opened for unloading and other operations. Summary of the Invention
[0003] The purpose of the utility model is to provide a car box anti-expansion device to address the deficiencies of the existing technology. It can solve the traditional simple problem, can laterally limit and support the box board on the outside of the car, can prevent the box board from expanding outward, and at the same time can easily open the box board for unloading and other operations.
[0004] The purpose of the present utility model is achieved as follows: a car box anti-expansion device includes an outer fixing seat, the outer fixing seat includes a pair of outer plates, the upper ends of the outer plates are provided with upward opening grooves, an upper limit piece is provided between the two outer plates, a rotatable limit pin is provided laterally on the upper limit piece, the limit pin extends outward into the corresponding open groove and is provided with a radial first protrusion, the width of the open groove is greater than or equal to the length of the long axis of the cross section of the shaft body corresponding to the protrusion,
[0005] The lower section of the upper limit member is provided with a horizontal lower hinge shaft, which extends on both sides of the upper limit member and slides with the vertical bar hole on the outer fixing seat. One end of the limit pin extending out of the open slot is provided with a sliding hole, in which a locking rod slides.
[0006] A lower insertion hole is provided at one end of the lower hinge shaft extending out of the bar hole. The lower insertion hole corresponds to the sliding hole in the vertical direction, and the lower end of the locking rod is inserted into the lower insertion hole.
[0007] An upper limit shoulder is provided on the upper end of the locking rod to limit the sliding of the locking rod in the sliding hole.
[0008] The upper limit member is a U-shaped channel steel, including an outer fixing seat which is a U-shaped channel steel.
[0009] Two symmetrical first protrusions are arranged on the shaft body of the limit pin, and the shaft body of the limit pin extending outward into the open groove is in the shape of an elliptical cylinder.
[0010] A lower limit shoulder is provided at the lower end of the locking rod, and the upper limit shoulder and the lower limit shoulder are located on both sides of the sliding hole. The distance from the lower limit shoulder to the lower end of the locking rod is smaller than the distance from the upper limit shoulder to the lower limit shoulder.
[0011] A second protrusion is provided on the shaft body of the lower hinge shaft extending into the bar hole, and a contraction section is provided in the middle section of the bar hole. The width of the contraction section is smaller than the long axis width of the shaft body cross section corresponding to the second protrusion, and is larger than the minimum dimension of the shaft body cross section corresponding to the second protrusion.
[0012] The bottom surface of the opening groove is a semi-cylindrical surface.
[0013] The first protrusion is in a semi-elliptical column shape, and the first protrusion smoothly transitions to the corresponding shaft body.
[0014] The upper end of the upper limit shoulder is provided with an upper connecting section for plugging into the lower plug hole, and two protrusions are symmetrically provided on the lower hinge shaft, and the shaft body corresponding to the protrusions is in the shape of an elliptical cylinder, and the long axis dimension of the elliptical cross section of the elliptical cylinder is smaller than the width of the contraction section, and the short axis dimension of the elliptical cross section of the elliptical cylinder is larger than the width of the contraction section, wherein the first lower plug hole is arranged along the short axis direction of the ellipse, and the second lower plug hole is arranged along the long axis direction of the ellipse.
[0015] The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. By adopting the above scheme, the beneficial effects are as follows: when the box plate needs to be laterally limited and supported, the upper end of the upper limit member is laterally subjected to the force exerted by the box plate, and the upper limit member tends to rotate. During the tightening process, the circumferential position of the protrusion can be adjusted to allow the position of the limit pin to float. When the protrusion is in a horizontal position, the position of the entire limit pin is close to the box plate. When the position of the protrusion changes with rotation, in the vertical direction, the position of the entire limit pin is offset outward, thereby driving the entire upper limit member to offset outward. By adopting this structure, the upper limit member can be brought close to the box plate before loading. Before unloading or during unloading, the position of the upper limit member can be offset, so that the abutment force between the upper limit shoulder and the box plate can be reduced or eliminated, and the limit pin can be conveniently pulled out of the open groove upward, so that the upper limit member can be easily removed from the box plate. Of course, during the long-term use of the box board, deformation of the box board and other situations will cause the limit pin of the upper limit shoulder to contact the opening groove too tightly. Through this structural design, the pressing force of the upper limit member can be adjusted according to actual needs, which makes it convenient to remove and install the upper limit member. The circumferential position of the limit pin can be locked by the locking rod, so that the position of the protrusion on the circumference is stable, which can ensure that it will not loosen during transportation. When the upper limit member is taken out upward, the upper limit member will not limit or support the box board, and will not affect the side opening or flipping of the box board. It has a simple structure and can limit and support the box board laterally on the outside of the car, which can prevent the box board from expanding outward. The utility model can easily install or remove the upper limit member according to actual needs, making it easy to open the box board for unloading and other operations.
[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural diagram of the utility model;
[0018] Figure 2 It is a schematic diagram of the assembly structure of the limit pin shaft.
[0019] In the accompanying drawings, 100 is an external fixing seat, 110 is an outer plate, 111 is a bar hole, 112 is a contraction section, 120 is an opening groove, 200 is an upper limit member, 210 is a limit pin shaft, 211 is a first protrusion, 222 is a second protrusion, 220 is a lower hinge shaft, 221 is a lower plug hole, 230 is a sliding hole, 250 is a locking rod, 252 is a limit shoulder, and 253 is an upper plug section. DETAILED DESCRIPTION
[0020] With reference to the accompanying drawings, specific embodiments of the present invention will be described in detail.
[0021] See also Figures 1 to 2 An embodiment of a vehicle compartment anti-expansion device includes an outer fixing seat 100, the outer fixing seat 100 including a pair of outer plates 110, the upper ends of the outer plates 110 are provided with upward opening grooves 120, an upper limit member 200 is provided between the two outer plates 110, and a rotatable limit pin 210 is laterally provided on the upper limit member 200, and the shaft body of the limit pin 210 extending outward into the corresponding opening groove 120 is provided with a radial first protrusion 211.
[0022] The width of the opening slot 120 is greater than or equal to the length of the long axis of the cross section of the shaft body corresponding to the protrusion 211.
[0023] The upper end of the upper limit member 200 extends from the upper end of the limit pin 210 to support the box plate laterally, and the lower end of the upper limit member 200 extends from the lower end of the limit pin 210 to be used to abut against the outer fixing seat 100. The lower section of the upper limit member 200 is provided with a horizontal lower hinge shaft 220. The lower hinge shaft 220 extends on both sides of the upper limit member 200 and slides with the vertical bar hole 111 on the outer fixing seat 100. One end of the limit pin 210 extending outward from the open slot 120 is provided with a sliding hole 230, and a locking rod 250 slides in the sliding hole 230.
[0024] A lower plug hole 221 is set at one end of the lower hinge shaft 220 extending out of the bar hole 111, and the lower plug hole 221 corresponds to the sliding hole 230 in the vertical direction. The lower end of the locking rod 250 is inserted into the lower plug hole 221, and the upper end of the locking rod 250 is provided with an upper limit shoulder 252 to limit the sliding of the locking rod 250 in the sliding hole 230.
[0025] In some embodiments, the upper limit positioning member 200 is a U-shaped channel steel, including the outer fixing seat 100 being a U-shaped channel steel. The use of U-shaped channel steel is convenient for obtaining materials and has high strength. The upper limit positioning member 200 is a U-shaped channel steel, including the outer fixing seat 100 being a U-shaped channel steel.
[0026] In some embodiments, the stop pin 210 is provided with two symmetrical first protrusions 211. The stop pin 210 extending into the open slot is elliptical in shape. With this structure, a 90° rotation achieves maximum deflection of the stop pin 210 while maintaining a smooth overall shape, preventing stress concentration and ensuring smooth rotation.
[0027] In some embodiments, a lower limit shoulder 252 is provided at the lower end of the locking rod 250, and the upper limit shoulder 252 and the lower limit shoulder 252 are located on both sides of the sliding hole 230. The distance from the lower limit shoulder 252 to the lower end of the locking rod 250 is smaller than the distance from the upper limit shoulder 252 to the lower limit shoulder 252. This structure can prevent the locking rod 250 from sliding downward. The locking rod 250 can continuously lock the lower hinge shaft 220 and the limit pin shaft 210 by relying on its own gravity, preventing the limit pin shaft 210 from rotating, and ensuring that the position of the protrusion 211 on the circumference remains stable throughout the entire transportation process and bumps.
[0028] In some embodiments, the shaft body of the lower hinge shaft 220 extending into the bar hole 111 is provided with a second protrusion 222, and the middle section of the bar hole 111 is provided with a contraction section 112, the width of the contraction section 112 is smaller than the long axis width of the shaft body cross section corresponding to the second protrusion 222, and larger than the minimum dimension of the shaft body cross section corresponding to the second protrusion 222. With this design, the lower hinge shaft 220 cannot pass through the contraction section 112 when it is placed horizontally, thereby preventing the upper limit member 200 from moving up and the limit pin shaft 210 from disengaging from the open groove 120 due to factors such as bumps during transportation, thereby avoiding failure of the entire structure. The circumferential position can be ensured to be stable by the locking rod 250. When it is necessary to remove the upper limit member 200, the locking rod 250 is pulled out and the hinge shaft is rotated, so that the smaller cross-section of the hinge shaft passes through the contraction section 112, thereby realizing the removal of the upper limit member 200.
[0029] In some embodiments, the bottom surface of the opening groove 120 is a semi-cylindrical surface. This structure can avoid stress concentration at the bottom of the groove and also facilitate the rotation of the limiting pin 210.
[0030] In some embodiments, the first protrusion 211 is semi-elliptical, and the first protrusion 211 smoothly transitions to the corresponding shaft body. With this structure, when the limit pin 210 rotates 180°, the limit pin 210 can be offset, and at the same time, the head of the locking rod 250 in the sliding hole 230 in the initial state can face and be inserted into the corresponding lower socket 221.
[0031] Furthermore, the upper end of the upper limit shoulder 252 is provided with an upper connecting section 253 for plugging into the lower plug hole 221, and two protrusions 211 are symmetrically provided on the lower hinge shaft 220, and the shaft body corresponding to the protrusions 211 is in the shape of an elliptical cylinder, and the long axis dimension of the elliptical cross section of the elliptical cylinder is smaller than the width of the contraction section 112, and the short axis dimension of the elliptical cross section of the elliptical cylinder is larger than the width of the contraction section 112, wherein the first lower plug hole 221 is arranged along the short axis direction of the ellipse, and the second lower plug hole 221 is arranged along the long axis direction of the ellipse. With this structure, when the limit pin 210 rotates 180°, the limit pin 210 can be offset, and at the same time, the head of the locking rod 250 in the sliding hole 230 in the initial state can be oriented and inserted into the corresponding lower plug hole 221, and the state of the lower hinge shaft 220 can be locked, that is, in the removed state, the locking rod 250 can perform secondary locking on the limit pin 210 and the locking rod 250. This locked state can facilitate the removal of the limit pin 210 and allow the lower hinge shaft 220 to pass through the contraction section 112, thereby realizing the upward movement of the entire upper limit member 200 and disengaging from the opening groove 120.
[0032] By adopting the above scheme, when the box plate needs to be laterally limited and supported, the upper end of the upper limit member 200 is laterally subjected to the force exerted by the box plate, and the upper limit member 200 tends to rotate. At this time, the lower end of the upper limit member 200 abuts against the outer fixing seat 100 to prevent the upper limit member 200 from rotating. The torque on the upper limit member 200 is balanced, completing the lateral support of the box plate. During the tightening process, the circumferential position of the first protrusion 211 can be adjusted to make the position of the limit pin 210 float. When the first protrusion 211 is in a horizontal position, the entire limit pin 200 is in a horizontal position. 10 is close to the box board. When the position of the first protrusion 211 changes with the rotation, in the vertical direction, the position of the entire limit pin 210 is offset outward, thereby driving the entire upper limit member 200 to offset outward. With this structure, the upper limit member 200 can be brought close to the box board before loading. Before unloading or during unloading, by offsetting the position of the upper limit member 200, the contact force between the upper limit shoulder and the box board can be reduced or eliminated, and the limit pin 210 can be easily pulled out from the opening groove 120, so that the upper limit member 200 can be easily removed from the box board. Of course, during the long-term use of the box board, the deformation of the box board may cause the limit pin 210 of the upper limit shoulder 252 to contact too tightly with the opening groove 120. With this structural design, the abutment force of the upper limit member 200 can be adjusted according to actual needs, making it convenient to remove and install the upper limit member 200. The locking rod 250 can lock the circumferential position of the limit pin 210, so that the position of the protrusion 211 on the circumference is stable, which can ensure that it will not loosen during transportation. When the upper limit member is removed upward, the upper limit member will not limit or support the box board, and will not affect the side opening or flipping of the box board. The utility model has a simple structure and can limit and support the box board laterally on the outside of the car body, which can prevent the box board from expanding outward. The upper limit member can be easily installed or removed according to actual needs, making it easy to open the box board for unloading and other operations.
Claims
1. A vehicle compartment anti-expansion device, characterized in that: The invention comprises an external fixing seat (100), wherein the external fixing seat (100) comprises a pair of outer plates (110), an upper end of each outer plate (110) is provided with an upward opening groove (120), an upper limit member (200) is provided between the two outer plates (110), a rotatable limit pin (210) is provided on the upper limit member (200), a radial first protrusion (211) is provided on the shaft body of the limit pin (210) extending outward into the corresponding opening groove (120), and the width of the opening groove (120) is greater than or equal to the length of the long axis of the cross section of the shaft body corresponding to the protrusion (211), A transverse lower hinge shaft (220) is provided at the lower section of the upper limit member (200), and the lower hinge shaft (220) extends on both sides of the upper limit member (200) and slides with the vertical bar hole (111) on the external fixing seat (100). A sliding hole (230) is provided at the end of one of the outer extending opening slots (120) of the limit pin shaft (210), and a locking rod (250) slides in the sliding hole (230). A lower plug hole (221) is provided at one end of the lower hinge shaft (220) that extends out of the bar hole (111), and the lower plug hole (221) corresponds to the sliding hole (230) in the vertical direction, and the lower end of the locking rod (250) is inserted into the lower plug hole (221).
2. The anti-expansion device for a carriage according to claim 1, characterized in that: An upper limit shoulder (252) is provided at the upper end of the locking rod (250) to limit the sliding movement of the locking rod (250) in the sliding hole (230).
3. The anti-expansion device for a carriage according to claim 2, characterized in that: A lower limit shoulder (252) is provided at the lower end of the locking rod (250), and the upper limit shoulder (252) and the lower limit shoulder (252) are located on both sides of the sliding hole (230), and the distance from the lower limit shoulder (252) to the lower end of the locking rod (250) is smaller than the distance from the upper limit shoulder (252) to the lower limit shoulder (252).
4. The anti-expansion device for a carriage according to claim 1, characterized in that: The upper limit member (200) is a U-shaped channel steel, including an outer fixing seat (100) which is a U-shaped channel steel.
5. The anti-expansion device for a carriage according to claim 1, characterized in that: Two symmetrical first protrusions (211) are provided on the shaft of the limiting pin (210), and the shaft of the limiting pin (210) extending outward into the open groove is in the shape of an elliptical column.
6. The anti-expansion device for a carriage according to claim 1, characterized in that: The lower hinge shaft (220) is provided with a second protrusion (222) on the shaft body extending outward from the strip hole (111), and a contraction section (112) is provided in the middle section of the strip hole (111), wherein the width of the contraction section (112) is smaller than the width in the long axis direction of the cross section of the shaft body corresponding to the second protrusion (222), and is larger than the minimum dimension of the cross section of the shaft body corresponding to the second protrusion (222).
7. The anti-expansion device for a carriage according to claim 1, characterized in that: The bottom surface of the opening groove (120) is a semi-cylindrical surface.
8. The anti-expansion device for a carriage according to claim 2, characterized in that: The first raised portion (211) is in the shape of a semi-elliptical cylinder, and the first raised portion (211) smoothly transitions to the corresponding shaft body.
9. The anti-expansion device for a carriage according to claim 8, characterized in that: The upper end of the upper limit shoulder (252) is provided with an upper plug-in section (253) for plugging into the lower plug hole (221); two protrusions (211) are symmetrically provided on the lower hinge shaft (220); the shaft body at the corresponding positions of the protrusions (211) is in the shape of an elliptical cylinder; the major axis dimension of the elliptical cross section of the elliptical cylinder is smaller than the width of the contraction section (112); the minor axis dimension of the elliptical cross section of the elliptical cylinder is larger than the width of the contraction section (112); wherein the first lower plug hole (221) is arranged along the minor axis direction of the ellipse, and the second lower plug hole (221) is arranged along the major axis direction of the ellipse.