Trailer cover of trailer

Abstract

The trailer cover comprises a trailer cover body, the trailer cover body comprises two mounting plates, a connecting ball arranged between the two mounting plates and a spherical shell with an opening in the left side, and the right side of the connecting ball is fixedly connected with an inserting rod. According to the utility model, a series of structures are arranged, so that the instant traction impact force of starting can be buffered and unloaded during the traction work when starting, the phenomenon of aggravated wear at the joint caused by the instant impact force generated by starting is reduced, and the long-acting stability is improved; and buffering and unloading of formed impact force during braking are facilitated, the connecting ball is blocked and limited on the left side to prevent falling, the risk that the connecting ball rushes out of the spherical shell or the abrasion of the opening part of the connecting ball is increased during braking is reduced, the risk that hard impact damage is generated at the joint is reduced, the use safety and long-acting stability are further improved, and the service life is prolonged. And the blocking and limiting state of the connecting ball can be relieved conveniently, and subsequent maintenance work of workers on the connecting part is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer covers, in particular to a trailer cover for a trailer. Background Technique

[0002] A trailer refers to a vehicle without a power drive device itself. Therefore, it cannot drive independently and must be towed by other vehicles to be used. It is generally used for transporting goods and is a common road transportation tool. Compared with other transportation methods, using a trailer for road transportation is more convenient, has a wider coverage range, and has a low transportation cost. The structure of the trailer itself is not complex. Its characteristic is that it cannot be used independently and must be used in combination with a towing vehicle. A trailer cover is generally used to connect the towing vehicle and the rear trailer. While ensuring a firm connection, flexibility also needs to be considered. When the trailer is in use, the driver is inside the towing vehicle in the front.

[0003] For the trailer cover of the existing trailer, the flexible connection between the towing vehicle and the trailer can be realized by using a spherical structure for buckling. For example, Chinese Patent Publication No. CN214822418U discloses a trailer cover for a trailer that reduces wear, which specifically relates to the technical field of trailer covers. It includes two connecting rods, a plug rod, and an anti-wear mechanism. A detachment mechanism is provided on one side of the plug rod. The detachment mechanism includes a sleeve. Two jacks are opened at the outer end of the plug rod. The jacks are located inside the sleeve. Two outer tubes are fixedly provided at the outer end of the sleeve. A spring and an electromagnet are fixedly provided on the inner wall of one side of the outer tube. By setting the detachment mechanism, when an accident occurs to the trailer and it is about to roll over or tip over, the electromagnet is energized to generate a magnetic force to adsorb the stop rod and move it, pulling out the stop rod originally inserted into the jack from the jack, disconnecting the connection between the plug rod and the sleeve, and further disconnecting the connection between the trailer and the towing vehicle in the front, avoiding the trailer tipping over and affecting the towing vehicle in the front and the driver in it, and giving priority to ensuring the safety of personnel.

[0004] Through the above technology, by setting the detachment mechanism, when an accident occurs to the trailer and it is about to roll over or tip over, the electromagnet is energized to generate a magnetic force to adsorb the stop rod and move it, pulling out the stop rod originally inserted into the jack from the jack, and then disconnecting the connection between the trailer and the towing vehicle in the front, avoiding the trailer tipping over and affecting the towing vehicle in the front and the driver in it, and giving priority to ensuring the safety of personnel. Through the structures such as the connecting ball, the outer shell, and the rolling balls, an anti-wear and flexible connection effect is formed. However, there are still the following problems:

[0005] 1. When the trailer starts to pull, a large instantaneous impact force will be generated at the beginning, which is likely to cause the connection to be subjected to a hard impact and increase wear. It is impossible to unload the instantaneous hard pulling impact force at the start, and the long-term stability is not ideal; 2. When braking, a relative impact force will be generated at the connection, which is likely to cause a large impact wear between the sphere and the opening of the spherical buckle part; improvement is needed. In view of this, this application proposes a trailer cover for the trailer to solve the above problems. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a trailer cover for a trailer to solve the problems raised in the above background technology.

[0007] To achieve the above purpose, the present utility model provides the following technical solution: A trailer cover for a trailer, including a trailer cover body. The trailer cover body includes two mounting plates, a connecting ball arranged between the two mounting plates, and a spherical shell with an opening on the left side. The right side of the connecting ball is fixedly connected with a plug rod, and the right end of the plug rod extends outside the spherical shell and is equipped with a detachment mechanism between it and the right mounting plate. A plurality of first anti-wear balls are movably embedded on the top inner wall, bottom inner wall, front inner wall and rear inner wall of the spherical shell. The connecting ball is movably sleeved between the plurality of first anti-wear balls. The plurality of first anti-wear balls provided are used to reduce the rotational friction force between the two when the trailer turns and pulls, causing the connecting ball to rotate in the spherical shell, and reduce the occurrence of wear;

[0008] The specific composition structure and detachment principle of the detachment mechanism are prior art. In addition, this composition and technology have also been disclosed in the above prior art CN214822418U, which is the same as it, and will not be elaborated separately here;

[0009] Both the left top and left bottom of the spherical shell are fixedly connected with fixed rods. The left ends of the two fixed rods are fixedly connected with the same connecting plate. Four horizontal guide buffer components are fixedly connected in a rectangular shape between the left side of the connecting plate and the right side of the left mounting plate. The horizontal guide buffer components are used to buffer and unload the instantaneous impact force generated at the start during the pulling work of the trailer, and use the buffer unloading to reduce the impact damage caused by the connecting ball and the spherical shell;

[0010] The same blocking and limiting component is slidably sleeved on the two fixed rods and is in active contact with the left side of the connecting ball. The connecting plate is threadedly sleeved on the blocking and limiting component. The blocking and limiting component is used to actively block and limit the connecting ball on the left side of the spherical shell, reducing the risk of the connecting ball rushing out of the spherical shell when braking.

[0011] Preferably, the horizontal guide buffer assembly includes a fixed sleeve fixedly connected to the right side of the mounting plate on the left side. The right side of the fixed sleeve is provided with a sealing structure. Four T-shaped guide rods are fixedly connected to the left side of the connecting plate in a rectangular shape. The fixed sleeve is slidably sleeved on the corresponding T-shaped guide rods. Buffer springs are fixedly connected to both the left side of the T-shaped guide rods and the inner wall on the left side. The buffer springs on the right side are movably sleeved on the corresponding T-shaped guide rods. The repelling ends of the two buffer springs on the same T-shaped guide rod are respectively fixedly connected to the right side of the mounting plate on the left side and the inner wall on the right side of the fixed sleeve.

[0012] Preferably, the blocking and limiting assembly includes a moving seat slidably sleeved on two fixed rods. The right side of the moving seat is provided with an arc-shaped convex mechanism. A plurality of second anti-wear balls are annularly and equidistantly embedded on the right side of the moving seat. The second anti-wear balls are in rolling contact with the left side of the connecting ball. A T-shaped screw rod is rotatably connected to the left side of the moving seat. The connecting plate is threadedly sleeved on the T-shaped screw rod.

[0013] Preferably, the mounting plate is L-shaped. A plurality of bolt mounting through holes are provided on the left side of the mounting plate on the right side and the bottom inner wall of the two mounting plates.

[0014] Preferably, a conical through hole is provided on the right side of the spherical outer shell. The insertion rod is located in the conical through hole and does not contact the inner wall of the conical through hole.

[0015] Preferably, the T-shaped screw rod is located between the four fixed sleeves.

[0016] Preferably, a threaded hole for threaded connection with the T-shaped screw rod is provided on the right side of the connecting plate.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. For the trailer cover of this trailer, through the cooperation of the spherical outer shell, the first anti-wear balls, the connecting ball, the insertion rod, the detachment mechanism and the mounting plate, the flexible connection between the trailer and the towing vehicle is realized;

[0019] 2. For the trailer cover of this trailer, through the cooperation of the mounting plate, the connecting plate and the horizontal guide buffer assembly, during the starting stage of the towing work, the impact force at the moment of starting can be buffered and unloaded, reducing the phenomenon of increased wear at the connection due to the instantaneous impact force generated during starting, and improving the long-term stability;

[0020] 3. The trailer cover of this trailer, through the cooperation of the set connecting plate, transverse guide buffer assembly, fixed rod and blocking and limiting assembly, can buffer and unload the impact force formed during braking and block and prevent the disconnection of the connecting ball on the left side, reducing the risk of the connecting ball rushing out of the spherical shell or aggravating the wear of its opening part during braking, and reducing the risk of hard impact damage at the connection, further improving the use safety and long-term stability, and facilitating the release of the blocking and limiting state of the connecting ball, which is convenient for subsequent maintenance work on the connection part by personnel.

[0021] By setting a series of structures, the present utility model can buffer and unload the instantaneous pulling impact force at the start during the pulling work, reduce the phenomenon of aggravated wear at the connection caused by the instantaneous impact force generated during starting, improve the long-term stability, facilitate buffering and unloading the impact force formed during braking and blocking and preventing the disconnection of the connecting ball on the left side, reduce the risk of the connecting ball rushing out of the spherical shell or aggravating the wear of its opening part during braking, and reduce the risk of hard impact damage at the connection, further improving the use safety and long-term stability, facilitating the release of the blocking and limiting state of the connecting ball, and being convenient for subsequent maintenance work on the connection part by personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the trailer cover of the trailer proposed by the present utility model;

[0023] Figure 2 is Figure 1 the sectional structural diagram of;

[0024] Figure 3 is Figure 2 the enlarged structural diagram of part A in;

[0025] In the figure: 1. mounting plate; 2. spherical shell; 3. first anti-wear ball; 4. connecting ball; 5. inserting rod; 6. disengaging mechanism; 7. tapered perforation; 8. fixed rod; 9. connecting plate; 10. T-shaped guide rod; 11. fixed sleeve; 12. buffer spring; 13. T-shaped screw; 14. moving seat; 15. second anti-wear ball; 16. threaded hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] As Figures 1 to 3As shown in the figure, the trailer cover of the trailer proposed in this embodiment includes a trailer cover body. The trailer cover body includes two mounting plates 1, a connecting ball 4 disposed between the two mounting plates 1, and a spherical outer shell 2 with an opening on the left side. A plug rod 5 is fixedly connected to the right side of the connecting ball 4. A disengagement mechanism 6 is installed between the right end of the plug rod 5 extending outside the spherical outer shell 2 and the right mounting plate 1. A tapered through hole 7 is formed on the right side of the spherical outer shell. The plug rod 5 is located in the tapered through hole 7 and does not contact the inner wall of the tapered through hole 7. The provided tapered through hole 7 serves to allow the plug rod 5 to pass through and provides conditions for it to rotate and tilt. A plurality of first anti-wear balls 3 are movably embedded on the top inner wall, bottom inner wall, front inner wall, and rear inner wall of the spherical outer shell 2. The connecting ball 4 is movably sleeved between the plurality of first anti-wear balls 3. The mounting plate 1 is L-shaped. A plurality of bolt mounting through holes are formed on the left side of the right mounting plate 1 and the bottom inner wall of the two mounting plates 1. The plurality of first anti-wear balls 3 provided are used to reduce the rotational friction between the two when the connecting ball 4 rotates in the spherical outer shell 2 due to the turning and pulling of the trailer, and reduce the occurrence of wear phenomena;

[0028] The specific composition structure and disengagement principle of the disengagement mechanism 6 are prior art. In addition, this composition and technology have also been disclosed in the above-mentioned prior art CN214822418U and are the same, so no further elaboration will be made here;

[0029] Fixed rods 8 are fixedly connected to the left top and left bottom of the spherical outer shell 2. The left ends of the two fixed rods 8 are fixedly connected to the same connecting plate 9. Four horizontal guide buffer components are fixedly connected in a rectangular shape between the left side of the connecting plate 9 and the right side of the left mounting plate 1. The horizontal guide buffer components are used to buffer and relieve the instantaneous impact force generated during the starting of the trailer during the pulling work, and reduce the impact damage caused by the connecting ball 4 and the spherical outer shell 2 by using buffer and force relief; A same limiting component that is in movable contact with the left side of the connecting ball 4 is slidably sleeved on the two fixed rods 8. The connecting plate 9 is threadedly sleeved on the limiting component. The limiting component is used to movably limit the connecting ball 4 on the left side of the spherical outer shell 2 and reduce the risk of the connecting ball 4 rushing out of the spherical outer shell 2 during braking.

[0030] Specifically, the horizontal guide buffer assembly includes a fixed sleeve 11 fixedly connected to the right side of the mounting plate 1 on the left side. The right side of the fixed sleeve 11 is provided with a sealing structure. Four T-shaped guide rods 10 are fixedly connected to the left side of the connecting plate 9 in a rectangular shape. The fixed sleeve 11 is slidably sleeved on the corresponding T-shaped guide rods 10. Among them, a horizontal guide hole for slidably sleeving the outer side of the corresponding T-shaped guide rod 10 is formed on the inner wall of the right side of the fixed sleeve 11, which has the effect of guiding the horizontal sliding of the T-shaped guide rod 10. Buffer springs 12 are fixedly connected to both the left side and the inner wall on the left side of the T-shaped guide rod 10. The buffer spring 12 located on the right side is movably sleeved on the corresponding T-shaped guide rod 10. The mutually repulsive ends of the two buffer springs 12 located on the same T-shaped guide rod 10 are respectively fixedly connected to the right side of the mounting plate 1 on the left side and the inner wall of the right side of the fixed sleeve 11; the cooperation of the set fixed sleeve 11, T-shaped guide rod 10 and buffer spring 12 is such that when the mounting plate 1 on the left side is instantaneously pulled during the start of the trailer, the mounting plate 1 on the left side drives the four fixed sleeves 11 to slide leftward on the four T-shaped guide rods 10, and stretches or compresses the multiple buffer springs 12. The elastic force of the buffer springs 12 is used to buffer and unload the instantaneous impact generated during the start of the trailer. When the buffer springs 12 are tightened, the connecting plate 9 is gradually driven to move through the T-shaped guide rods 10, so as to drive the right-side structure to move in sequence.

[0031] Further, the blocking and limiting component includes a moving seat 14 slidably sleeved on two fixed rods 8. A guiding hole slidably sleeved on the outer side of the corresponding fixed rod 8 is respectively provided on the right side of the moving seat 14, which has the effect of guiding the horizontal sliding of the moving seat 14. The right side of the moving seat 14 is provided with an arc-shaped convex mechanism. A plurality of second anti-wear balls 15 are annularly and equidistantly embedded on the right side of the moving seat 14. The second anti-wear balls 15 are in rolling contact with the left side of the connecting ball 4. A T-shaped screw rod 13 is rotatably connected to the left side of the moving seat 14. A bearing is fixedly connected to the left side of the moving seat 14, and the inner side of the inner ring of the bearing is fixedly connected to the outer side of the T-shaped screw rod 13, which has the effect of rotatably installing the T-shaped screw rod 13. By using the rotatable connection method, when the T-shaped screw rod 13 rotates, no rotational torque phenomenon will be generated on the moving seat 14. The connecting plate 9 is threadedly sleeved on the T-shaped screw rod 13. A threaded hole 16 threadedly connected to the T-shaped screw rod 13 is provided on the right side of the connecting plate 9. By using the threaded connection between the T-shaped screw rod 13 and the threaded hole 16, it has the effect of facilitating the left and right displacement when the T-shaped screw rod 13 rotates. The T-shaped screw rod 13 is located between the four fixed sleeves 11. The cooperation of the arranged moving seat 14, the second anti-wear balls 15 and the T-shaped screw rod 13 is used to realize the movable blocking and limiting of the connecting ball 4 by a plurality of second anti-wear balls 15 on the left side, reducing the risk that the connecting ball 4 rushes out of the spherical shell 2 or aggravates the wear of its opening part during braking. When subsequent maintenance is required, the T-shaped screw rod 13 is rotated reversely to rotate in the connecting plate 9 and move leftward. The T-shaped screw rod 13 drives the moving seat 14 to move leftward. The moving seat 14 drives a plurality of second anti-wear balls 15 to move leftward to release the blocking state of the connecting ball 4. Then the personnel can remove the connecting ball 4 from the spherical shell 2 for maintenance work, which is convenient for releasing the blocking state.

[0032] The usage method of this embodiment is as follows: The two mounting plates 1 are respectively fixedly installed on the towing vehicle and the trailer. The cooperation of the arranged fixed sleeves 11, the T-shaped guide rods 10 and the buffer springs 12 is used. When the towing vehicle of the trailer starts to pull and generates an instantaneous impact force on the left mounting plate 1, the left mounting plate 1 drives the four fixed sleeves 11 to slide leftward on the four T-shaped guide rods 10, and stretches or compresses a plurality of buffer springs 12. The elastic force of the buffer springs 12 is used to buffer and relieve the instantaneous impact force generated during the towing work of the trailer at the start. When the buffer springs 12 are tightened, the connecting plate 9 is gradually driven to move through the T-shaped guide rods 10, so as to drive the right-side structure to move in sequence. By buffering and relieving the instantaneous pulling impact force at the start during the towing work, the instantaneous hard pulling impact force generated at the start can be effectively relieved, and the phenomenon that the connection part is aggravated due to the instantaneous impact force generated at the start can be reduced, improving the long-term stability.

[0033] When the braking generates counteracting forces on both sides, the mounting plate 1 on the right drives the connecting plate 9 to move leftward successively through the disengaging mechanism 6, the plug rod 5, the connecting ball 4, the spherical housing 2 and the two fixing rods 8. The connecting plate 9 drives the four T-shaped guide rods 10 to slide leftward in the four fixed sleeves 11 and compress or buffer the multiple buffer springs 12. At this time, the elastic force of the multiple buffer springs 12 can also be used to buffer and relieve the counteracting force formed by the braking, reducing the risk of hard impact damage at the connection. In addition, at this time, the multiple second anti-wear balls 15 can also be used to movably limit the connecting ball 4 on the left side, reducing the risk of the connecting ball 4 rushing out of the spherical housing 2 or aggravating the wear of its opening part during braking, further improving the use safety and long-term stability;

[0034] During subsequent maintenance requirements, rotate the T-shaped screw 13 in the reverse direction so that it rotates and moves leftward in the connecting plate 9. The T-shaped screw 13 drives the moving seat 14 to move leftward. The moving seat 14 drives the multiple second anti-wear balls 15 to move leftward to release the limiting state of the connecting ball 4. Then, the personnel can perform maintenance or add lubricating oil and other work on the connecting ball 4 and inside the spherical housing 2, making it easy to release the limiting state of the connecting ball 4 and facilitating the subsequent maintenance work of the personnel;

[0035] During the traction work, when the towing vehicle turns, it will drive the spherical housing 2 to rotate and tilt outside the connecting ball 4 successively through the mounting plate 1 on the left side, the horizontal guide buffer assembly, the connecting plate 9 and the fixing rod 8. After tilting to a certain extent, it will pull the connecting ball 4 to rotate and tilt. The connecting ball 4 drives the trailer to rotate successively through the plug rod 5, the disengaging mechanism 6 and the mounting plate 1 on the right side. By using the relative rotation mode of the spherical housing 2 and the connecting ball 4, the flexibility of the connection is ensured.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A trailer cover for a trailer, comprising a trailer cover body, the trailer cover body comprising two mounting plates (1), a connecting ball (4) arranged between the two mounting plates (1), and a spherical shell (2) with an opening on the left side, a plug rod (5) being fixedly connected to the right side of the connecting ball (4), a right end of the plug rod (5) extending outside the spherical shell (2) and a disengagement mechanism (6) being installed between the mounting plate (1) on the right side, characterized in that: A plurality of first anti-wear balls (3) are movably embedded on the top inner wall, the bottom inner wall, the front inner wall and the rear inner wall of the spherical housing (2), and the connecting ball (4) is movably sleeved between the plurality of first anti-wear balls (3); The left top and left bottom of the spherical housing (2) are both fixedly connected to fixing rods (8), the left ends of the two fixing rods (8) are fixedly connected to the same connecting plate (9), and four cross-guide buffer assemblies are fixedly connected in a rectangular shape between the left side of the connecting plate (9) and the right side of the left mounting plate (1); The two fixed rods (8) are slidably sleeved with a same stopper assembly that is in active contact with the left side of the connecting ball (4), and the connecting plate (9) is threadedly sleeved on the stopper assembly.

2. The trailer cover of the trailer according to claim 1, characterized in that: The transverse guide buffer assembly comprises a fixed sleeve (11) fixedly connected to the right side of the left mounting plate (1), the right side of the fixed sleeve (11) being arranged as a blocking structure, the left side of the connecting plate (9) being rectangular and fixedly connected to four T-shaped guide rods (10), the fixed sleeve (11) being slidably mounted on the corresponding T-shaped guide rods (10), the left side and the left inner wall of the T-shaped guide rod (10) being fixedly connected to buffer springs (12), the buffer spring (12) on the right side being movably mounted on the corresponding T-shaped guide rod (10), and the repelling ends of the two buffer springs (12) on the same T-shaped guide rod (10) being fixedly connected to the right side of the left mounting plate (1) and the right inner wall of the fixed sleeve (11), respectively.

3. The trailer cover of the trailer according to claim 2, characterized in that: The blocking assembly comprises a movable seat (14) slidably mounted on two fixed rods (8), the right side of the movable seat (14) being provided with an arc-shaped protrusion mechanism, a plurality of second anti-wear balls (15) being embedded in an annular shape and at equal intervals on the right side of the movable seat (14), the second anti-wear balls (15) being in rolling contact with the left side of the connecting ball (4), the left side of the movable seat (14) being rotatably connected with a T-shaped screw rod (13), and the connecting plate (9) being threadedly mounted on the T-shaped screw rod (13).

4. The trailer cover of a trailer according to claim 1, characterized in that: The mounting plate (1) is L-shaped, and a plurality of bolt mounting through holes are provided on the left side of the mounting plate (1) on the right side and on the bottom inner walls of the two mounting plates (1).

5. The trailer cover of a trailer according to claim 1, characterized in that: A conical through hole (7) is provided on the right side of the spherical shell (2), and the insertion rod (5) is located in the conical through hole (7) and does not contact the inner wall of the conical through hole (7).

6. The trailer cover of a trailer according to claim 3, characterized in that: The T-shaped screw rod (13) is located between the four fixing sleeves (11).

7. The trailer cover of a trailer according to claim 3, characterized in that: A threaded hole (16) threadably connected to the T-shaped screw rod (13) is provided on the right side of the connecting plate (9).

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