Trailer traction mechanism and tractor trailer device

Abstract

The utility model provides a trailer traction mechanism and a tractor trailer device, the trailer traction mechanism comprises a traction plate, both ends of the traction plate are provided with pin shafts, one end of each pin shaft is inserted into the end part of the traction plate, the traction plate is provided with a connecting hole, the connecting hole extends into the pin shaft from the side surface of the pin shaft, and a connecting pin is arranged in the connecting hole. One end of the connecting pin is in interference fit with the traction plate, the other end of the connecting pin extends into the pin shaft, and the length of the part, extending into the pin shaft, of the connecting hole is not smaller than that of the connecting pin; and the other end of the pin shaft is provided with an insertion hole. By adopting the trailer device, when the pin shaft is damaged, the connecting pin can be completely jacked into the pin shaft, so that the connection between the pin shaft and the traction plate is released, the pin shaft is pulled out of the traction plate to be replaced, the whole traction plate does not need to be replaced, and the maintenance cost of the trailer device is reduced. The tractor trailer device comprises a hitching plate connected with the middle of the traction plate and two traction pull rods connected with the pin shafts.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer towing devices, and particularly relates to a trailer towing mechanism and a tractor-trailer device. Background Art

[0002] A tractor-trailer device includes a suspension pull rod part and a towing plate part. Both ends of the towing plate part are used to connect to a tractor through the suspension pull rod, and the middle part of the towing plate part is used to connect to a trailer. The current common structure of the towing plate part is that pin shafts are welded at both ends of the towing plate casting. When in use, after the pin shafts pass through the suspension pull rods, cotter pins are then used to pass through the pin shafts for limiting. Since there is always friction between the pin shafts and the suspension pull rods, and the pin shafts bear the front and back traction forces, the pin shafts are prone to breakage or wear and failure. When the pin shafts are damaged, the entire towing plate part cannot restore its use function by replacing components, and can only be replaced as a whole, which is costly and greatly increases the maintenance cost of the trailer device. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: how to reduce the maintenance cost of the trailer device.

[0004] The technical solution of the utility model to solve the above technical problem is as follows:

[0005] The utility model provides a trailer towing mechanism, which includes a towing plate. Both ends of the towing plate are provided with pin shafts. One end of each pin shaft is inserted into the end of the towing plate. The towing plate is provided with a connection hole, which extends from the side of the pin shaft to the inside of the pin shaft. A connection pin is arranged in the connection hole. One end of the connection pin is in interference fit with the towing plate, and the other end of the connection pin extends into the pin shaft. The length of the part of the connection hole extending into the pin shaft is not less than the length of the connection pin; the other end of the pin shaft is provided with a jack.

[0006] The beneficial effects of the utility model are:

[0007] By adopting the utility model, the length of the part of the connection hole extending into the pin shaft is not less than the length of the connection pin. When the pin shaft is damaged, the connection pin can be fully pushed into the pin shaft, so as to release the connection between the pin shaft and the towing plate, realizing the extraction and replacement of the pin shaft from the towing plate, without replacing the whole towing plate, and reducing the maintenance cost of the trailer device.

[0008] On the basis of the above technical solution, the utility model can also be improved as follows.

[0009] Further, the pin shaft is cylindrical, and the pin shaft and the towing plate are in transition fit or interference fit.

[0010] Avoid frequent impact between the pin shaft and the towing plate, and have a long service life.

[0011] Further, the connection hole extends along the radial direction of the pin shaft.

[0012] The stress uniformity of the pin shaft is good, improving the structural strength.

[0013] Furthermore, an interference fit is provided between the connecting pin and the pin shaft.

[0014] Frequent impacts between the connecting pin and the pin shaft are avoided, and the service life is long.

[0015] Furthermore, the part of the connecting hole extending into the pin shaft is a blind hole.

[0016] When disassembling the pin shaft, the end of the connecting pin is prevented from being exposed and rubbing against the inside of the towing plate, facilitating the reduction of resistance.

[0017] Furthermore, the connecting pin is a cylindrical pin and the connecting hole is a circular hole.

[0018] This facilitates reducing the weakening effect of the opening strength between the towing plate and the pin shaft, while ensuring the cross-sectional area of the cylindrical pin and improving the shear resistance.

[0019] Furthermore, a plurality of hanging holes are provided in the middle of the towing plate.

[0020] When towing a trailer, it is convenient for one end of the connecting member to be connected to the towing plate through the hanging hole and the other end to be connected to the trailer, and the disassembly and assembly are convenient.

[0021] The present utility model further provides a tractor trailer device, including a hanging plate, two towing rods and the above-mentioned trailer towing mechanism. One end of the hanging plate is connected to the middle of the towing plate. The two towing rods are located at both ends of the towing plate. The pin shaft passes through one end of the towing rod and is connected with a limit pin, and a connecting fastener is provided at the other end of the towing rod.

[0022] The connecting fastener can adopt a hanging ring, a shackle, a ball head hinge, etc., and can be used to connect the physical structures on both sides of the tractor; the other end of the hanging plate can be connected to the trailer through structures such as a split pin, a bolt, a hook, etc.; the installation is convenient. When the pin shaft is damaged, the connecting pin can be fully pushed into the pin shaft, realizing the extraction and replacement of the pin shaft from the towing plate without replacing the entire towing plate, and the maintenance cost is low;

[0023] Furthermore, a ball head hinge is provided at one end of the towing rod. The ball head hinge includes an inner ball core and an annular shell. The annular shell is sleeved on the equator of the inner ball core, and the towing rod is fixed on the annular shell; a through hole penetrating both poles of the inner ball core is provided in the inner ball core, and the pin shaft can pass through the through hole.

[0024] The annular shell matches the equator of the inner ball core, enabling the annular shell to move around the inner ball core, realizing the movement of the towing rod without dead angles within a certain range, thereby enabling stepless adjustment of the height and width of the towing rod, with good flexibility; at the same time, structural interference can be avoided and mechanical damage can be avoided.

[0025] Further, one end of the hanging plate is connected to the middle of the traction plate through a first pin, and the other end of the hanging plate is provided with a vertical second pin and a pin hole for inserting the second pin.

[0026] Convenient installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the trailer towing mechanism of the present invention.

[0028] Figure 2 is Figure 1 a top view of

[0029] Figure 3 is a schematic structural diagram of the tractor trailer device of the present invention.

[0030] In the drawings, the technical features represented by the reference numerals are as follows:

[0031] 1 - traction plate; 2 - pin shaft; 3 - connection hole; 4 - connection pin; 5 - jack; 6 - hanging hole; 7 - traction rod; 8 - hanging plate; 9 - limit pin; 10 - connection fastener; 11 - inner ball core; 12 - annular shell; 13 - first pin; 14 - second pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0033] The present invention is referred to Figures 1-3 .

[0034] Example 1, as Figures 1-2 shown:

[0035] The present invention provides a trailer towing mechanism, including a traction plate 1. Both ends of the traction plate 1 are provided with pin shafts 2. One end of the pin shaft 2 is inserted into the end of the traction plate 1. The traction plate 1 is provided with a connection hole 3. The connection hole 3 extends from the side of the pin shaft 2 to the inside of the pin shaft 2. A connection pin 4 is arranged in the connection hole 3. One end of the connection pin 4 is in interference fit with the traction plate 1, and the other end of the connection pin 4 extends into the pin shaft 2. The length of the part of the connection hole 3 extending into the pin shaft 2 is not less than the length of the connection pin 4; the other end of the pin shaft 2 is provided with a jack 5.

[0036] Principle:

[0037] During use, the middle part of the towing plate 1 is used to connect the trailer. After the pin shafts 2 at both ends of the towing plate 1 pass through the suspension pull rods, a limit pin 9 is used to pass through the jacking holes 5 on the pin shafts 2 for limiting to prevent the suspension pull rods from detaching from the ends of the pin shafts 2; one end of the suspension pull rod is used to connect the tractor. The two sides of the tractor transmit the pulling force to both ends of the towing plate 1 through the suspension pull rods, ensuring the balance of the towing plate 1, and the middle part of the towing plate 1 pulls the trailer forward. When the pin shaft 2 is damaged, a thimble can be inserted into the connecting hole 3 and the thimble can be struck, and then the connecting pin 4 can be completely knocked into the pin shaft 2, so that the pin shaft 2 can be pulled out from the towing plate 1, realizing the replacement of the pin shaft 2 without replacing the entire towing plate 1.

[0038] By adopting the utility model, the length of the part of the connecting hole 3 extending into the pin shaft 2 is not less than the length of the connecting pin 4. When the pin shaft 2 is damaged, the connecting pin 4 can be completely pushed into the pin shaft 2, so as to release the connection between the pin shaft 2 and the towing plate 1, realizing the pulling out and replacement of the pin shaft 2 from the towing plate 1 without replacing the entire towing plate 1, and reducing the maintenance cost of the trailer device.

[0039] Furthermore, the pin shaft 2 is cylindrical, and there is an interference fit or a transition fit between the pin shaft 2 and the towing plate 1.

[0040] Avoiding frequent impacts between the pin shaft 2 and the towing plate 1, it has a long service life.

[0041] Furthermore, the connecting hole 3 extends radially along the pin shaft 2.

[0042] The stress uniformity of the pin shaft 2 is good, improving the structural strength.

[0043] Furthermore, there is an interference fit between the connecting pin 4 and the pin shaft 2.

[0044] Avoiding frequent impacts between the connecting pin 4 and the pin shaft 2, it has a long service life.

[0045] Furthermore, the part of the connecting hole 3 extending into the pin shaft 2 is a blind hole.

[0046] When disassembling the pin shaft 2, it is avoided that the end of the connecting pin 4 is exposed and scratches the inside of the towing plate 1, which is convenient for reducing the resistance.

[0047] Furthermore, the connecting pin 4 is a cylindrical pin and the connecting hole 3 is a round hole.

[0048] It is convenient for reducing the weakening effect of the opening strength between the towing plate 1 and the pin shaft 2, and at the same time ensuring the cross-sectional area of the cylindrical pin and improving the shear resistance.

[0049] Furthermore, a plurality of hanging holes 6 are provided in the middle part of the towing plate 1.

[0050] When towing a trailer, it is convenient for one end of the connecting piece to be connected to the towing plate 1 through the hanging hole 6 and the other end to be connected to the trailer, and the disassembly and assembly are convenient.

[0051] Example 2 is as follows Figure 3 shown as

[0052] The present utility model further provides a tractor trailer device, which includes a hitch plate 8, two towing rods 7 and the above-mentioned trailer towing mechanism. One end of the hitch plate 8 is connected to the middle of the towing plate 1. The two towing rods 7 are located at both ends of the towing plate 1. One end of the pin shaft 2 passes through the towing rod 7 and is connected with a limit pin 9. The other end of the towing rod 7 is provided with a connection fastener 10.

[0053] The connection fastener 10 can adopt a hanging ring, a shackle, a ball head hinge piece, etc., and can be used to connect the entity structures on both sides of the tractor; the other end of the hitch plate 8 can be connected to the trailer through structures such as a split pin, a bolt, a hook, etc. The installation is convenient. When the pin shaft 2 is damaged, the connection pin 4 can be fully pushed into the pin shaft 2, so as to realize the extraction and replacement of the pin shaft 2 from the towing plate 1, and there is no need to replace the whole towing plate 1, and the maintenance cost is low;

[0054] Furthermore, one end of the towing rod 7 is provided with a ball head hinge piece. The ball head hinge piece includes an inner ball core 11 and an annular shell 12. The annular shell 12 is sleeved on the equator of the inner ball core 11. The towing rod 7 is fixed on the annular shell 12; a through hole penetrating through the two poles of the inner ball core 11 is arranged inside the inner ball core 11, and the pin shaft 2 can penetrate through the through hole.

[0055] The annular shell 12 matches the equator of the inner ball core 11, so that the annular shell 12 can move around the inner ball core 11, realizing the dead-angle-free movement of the towing rod 7 within a certain range. Thus, the height and width of the towing rod 7 can be adjusted steplessly, and the flexibility is good; at the same time, structural interference can be avoided, and mechanical damage can be avoided.

[0056] Furthermore, one end of the hitch plate 8 is connected to the middle of the towing plate 1 through a first split pin 13. The other end of the hitch plate 8 is provided with a vertical second split pin 14 and a pin hole for the second split pin 14 to be inserted into.

[0057] The installation is convenient.

[0058] In the description of the present utility model, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as: "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of understanding the present utility model and simplifying the description, rather than indicating or implying that the part, component or whole referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0059] In addition, if there are descriptive terms indicating order, such as: "first", "second", etc., their use in this specification is for the convenience of understanding or simplifying the description. For example, in order to distinguish multiple technical features of the same type or function and having to be mentioned separately, this specification may use the way of prefixing or suffixing descriptive terms of order to distinguish them. Therefore, it should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] In the present utility model, if there are descriptive terms indicating the relationship between structure and function, such as: "mount", "connect", "join", "fix", etc., unless otherwise clearly specified and defined, a broad understanding should be made. For example, "mount", "connect", "join", etc. can be a fixed connection, a detachable connection, or integrated; can be a mechanical connection or an electrical connection; can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components; "fix" can be a fixed integration or a detachable fixation through fasteners; can be directly fixed or fixed through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above descriptive terms in the present utility model can be understood according to the specific situation, the context, the coherence of the context before and after, etc.

[0061] In the present utility model, if there are descriptive terms with connotations of attachment or connection, for example, the first feature is "above" or "below" the second feature, unless otherwise clearly specified and defined, it should not be construed restrictively. For example, "above" or "below" may mean that the first and second features are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above descriptive terms in the present utility model can be understood according to the specific circumstances, the context, and the coherence of the context before and after.

[0062] Furthermore, the first feature being "above", "over", or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", or "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0063] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments, examples, and the features of different embodiments and examples described in this specification, and these combinations or combinations should fall within the scope encompassed by the present utility model.

[0064] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Changes, modifications, substitutions, and variations made to the above embodiments by those of ordinary skill in the art within the scope of information available in the public domain and in combination with the technical disclosure given in this application document are still within the protection scope of this application.

Claims

1. A trailer towing mechanism, characterized in that: It includes a towing plate (1). At both ends of the towing plate (1), there are pin shafts (2). One end of the pin shaft (2) is inserted into the end of the towing plate (1). There is a connecting hole (3) on the towing plate (1). The connecting hole (3) extends from the side of the pin shaft (2) into the pin shaft (2). A connecting pin (4) is arranged in the connecting hole (3). One end of the connecting pin (4) is in interference fit with the towing plate (1), and the other end of the connecting pin (4) extends into the pin shaft (2). The length of the part of the connecting hole (3) extending into the pin shaft (2) is not less than the length of the connecting pin (4). At the other end of the pin shaft (2), there is a jack (5).

2. The trailer towing mechanism according to claim 1, characterized in that: The pin shaft (2) is cylindrical, and there is a transition fit or interference fit between the pin shaft (2) and the towing plate (1).

3. The trailer towing mechanism according to claim 1, characterized in that: The connecting hole (3) extends radially along the pin shaft (2).

4. The trailer towing mechanism according to claim 1, wherein: There is an interference fit between the connecting pin (4) and the pin shaft (2).

5. The trailer towing mechanism according to claim 4, characterized in that: The part of the connecting hole (3) extending into the pin shaft (2) is a blind hole.

6. The trailer towing mechanism according to claim 4, characterized in that: The connecting pin (4) is a cylindrical pin, and the connecting hole (3) is a round hole.

7. The trailer towing mechanism according to claim 1, wherein: There are multiple hanging holes (6) in the middle of the towing plate (1).

8. A tractor trailer device, characterized in that: It includes a hanging plate (8), two towing rods (7) and the trailer towing mechanism according to any one of claims 1-7. One end of the hanging plate (8) is connected to the middle of the towing plate (1). The two towing rods (7) are located at both ends of the towing plate (1). After the pin shaft (2) penetrates through one end of the towing rod (7), a limit pin (9) is connected. At the other end of the towing rod (7), there is a connecting fastener (10).

9. The tractor-trailer device according to claim 8, characterized in that: One end of the towing rod (7) is provided with a ball joint. The ball joint includes an inner ball core (11) and an annular shell (12). The annular shell (12) is sleeved on the equator of the inner ball core (11). The towing rod (7) is fixed on the annular shell (12). A through hole penetrating the two poles of itself is arranged in the inner ball core (11), and the pin shaft (2) can penetrate through the through hole.

10. The tractor-trailer device according to claim 8, characterized in that: One end of the hanging plate (8) is connected to the middle of the towing plate (1) through a first pin (13). At the other end of the hanging plate (8), there is a vertical second pin (14) and a pin hole for the second pin (14) to be inserted into.

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