Trailing connecting device and tractor

Abstract

The utility model relates to the field of tractor towing devices, and discloses a towing connecting device and a tractor. The pull connecting device comprises a pull support, a pull plate, a pull head, a locking plate and a pin shaft. The towing plate is connected with the towing bracket and is provided with a pin shaft mounting hole penetrating in the front-back direction; a mounting pin head is arranged at the front end of the towing head, a towing connecting hole is formed in the rear end of the towing head, and the mounting pin head forwards penetrates through the pin shaft mounting hole and can rotate in the pin shaft mounting hole; the locking plate is fixedly mounted at the front end of the mounting pin head; and the pin shaft is arranged in the towing connecting hole in a penetrating manner. According to the pull connecting device, the tension bearing capacity of the pull connecting device can be improved, and the pull connecting device is simple in overall structure and high in stability.

Description

Technical Field

[0001] This application belongs to the field of tractor towing devices, and specifically, relates to a towing connection device and a tractor. Background Art

[0002] The towing device is an important connection device between a tractor and a trailer. As Figure 1 shown, the existing towing device includes a connected towing fixed seat F and a towing connection seat L. The towing fixed seat F is connected to the tractor body, and the towing connection seat L is connected to the trailer. Relative rotation between the towing fixed seat F and the towing connection seat L cannot be achieved.

[0003] However, when the tractor is towing a trailer, when encountering a bumpy road surface, relative torsion will occur between the trailer and the tractor. When the torsion angle is relatively large, it may cause the tractor to roll over caused by the trailer driving the tractor, or the yield damage of the towing device; even if the torsion angle is relatively small, being in a torsion working condition for a long time may also cause fatigue damage to the towing device. Summary of the Utility Model

[0004] The purpose of this application is to provide a towing connection device and a tractor to solve the technical problem that the existing towing device is prone to damage under torsion working conditions.

[0005] To achieve the above purpose, on the one hand, this application provides a towing connection device, which includes:

[0006] A towing bracket;

[0007] A towing plate, connected to the towing bracket and provided with a pin installation hole penetrating in the front-rear direction;

[0008] A towing head, with a mounting pin head at the front end and a towing connection hole at the rear end. The mounting pin head passes forward through the pin installation hole and can rotate within the pin installation hole;

[0009] A locking plate, used to be fixedly installed at the front end of the mounting pin head; and

[0010] A pin, passing through the towing connection hole.

[0011] In some embodiments, the towing plate is further provided with an elastic member installation hole penetrating in the front-rear direction. A limiting groove is provided on the front end face of the towing head or the rear end face of the locking plate. The towing connection device further includes an elastic pushing member and a positioning ball. The elastic pushing member is installed in the elastic member installation hole and is compressed between the locking plate and the towing head. The positioning ball is located in the limiting groove and abuts against the elastic pushing member.

[0012] In some embodiments, the number of elastic member installation holes is multiple, and the multiple elastic member installation holes are arranged at intervals along the circumferential direction of the pin installation hole.

[0013] In some embodiments, the towing plate includes a seat body and a baffle plate. The elastic member mounting holes are provided on the seat body, and the baffle plate is provided with through holes, and the through holes are arranged in front-to-back alignment with the elastic member mounting holes.

[0014] In some embodiments, the seat body is arranged in a U shape, and the towing plate further includes a reinforcing plate, and the reinforcing plate is arranged closely along the inner edge of the U shape of the seat body.

[0015] In some embodiments, a plurality of adjustment holes are provided at the rear end of the towing bracket, and the plurality of adjustment holes are arranged at intervals in the up-down direction. The towing plate is provided with a towing plate adjustment hole for selectively aligning and installing with the adjustment holes.

[0016] In some embodiments, the towing connection device further includes a bracket locking pin, and the bracket locking pin passes through the towing plate and the towing bracket through the towing plate adjustment hole and the adjustment hole.

[0017] In some embodiments, the number of the towing plate adjustment holes is multiple.

[0018] In some embodiments, a handle is formed at the upper end of the pin shaft.

[0019] On the other hand, the present application protects a tractor, including:

[0020] A vehicle body; and

[0021] The above-mentioned towing connection device, the towing bracket is connected to the vehicle body, and the towing head is used to be connected to an external towing device.

[0022] By the above technical solutions, the towing connection device provided by the embodiments of the present utility model has the following beneficial effects:

[0023] In the technical solution of the present application, the towing head is rotatably mounted on the towing plate. Compared with the prior art in which the towing fixed seat and the towing connection seat cannot rotate relative to each other, after the towing head of the towing connection device of the present application is connected to the external towing device, the towing head can rotate circumferentially. Therefore, when the tractor passes through bumpy roads or the like, it can avoid the tractor being overturned or yielding and damaged due to the deflection of the external towing device, and also avoid the fatigue damage that may be caused by the torsional working condition. When the towing head bears a tensile load, the locking plate can abut against the front end face of the towing plate to prevent the installation pin head from disengaging from the pin shaft installation hole, and the contact area between the locking plate and the towing plate is large, and the shear resistance performance is good, which can not only improve the tensile load-bearing capacity of the towing connection device, but also has a simple overall structure and high stability.

[0024] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific embodiments section. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts. In the drawings:

[0026] Figure 1 is a schematic structural view of a trailer connection device in the prior art;

[0027] Figure 2 is a schematic structural view of a trailer connection device according to a specific embodiment of the present application;

[0028] Figure 3 is Figure 2 a schematic structural view of a partial structure of the trailer connection device in;

[0029] Figure 4 is Figure 2 a bottom view of the assembled partial structure of the trailer connection device in;

[0030] Figure 5 is Figure 4 a cross-sectional view taken along line A-A of the partial structure of the trailer connection device in.

[0031] Description of Reference Numerals

[0032] Specific Embodiments

[0033] The following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0034] The following describes a trailer connection device and a tractor according to the present application with reference to the accompanying drawings.

[0035] The present application discloses a novel trailer connection device, as shown in Figure 2 and Figure 3 A trailer connection device in a specific embodiment includes:

[0036] A trailer bracket 100;

[0037] A trailer plate 210, connected to the trailer bracket 100 and provided with a pin installation hole 215 penetrating in the front-rear direction;

[0038] A trailer head 220, provided with a mounting pin head 221 at the front end and a trailer connection hole 224 at the rear end. The mounting pin head 221 passes forward through the pin installation hole 215 and can rotate within the pin installation hole 215;

[0039] A locking plate 221a, which is used for fixedly installing at the front end of the mounting pin head 221; and

[0040] A pin shaft 223, which is inserted into the towing connection hole 224 and is used for connecting an external towing device.

[0041] Specifically, referring to Figure 2 , the towing head 220 can be coaxially arranged around the axis V of the towing head that is coaxial with the midline of the towing and pin shaft mounting hole 215 and extends in the front-back direction. Compared with Figure 1 the shown towing device, in the torsion condition of the towing connection device of the present application, that is, when the external towing device deflects due to reasons such as bumpy road conditions of the external towing device, the stress generated by torsion between the towing plate 210 and the towing head 220 can be avoided. After the external towing device is hinged to the towing head 220 through the pin shaft 223, it can not only rotate relative to the axis V of the towing head, but also horizontally yaw, with higher degrees of freedom. The locking plate 221a can abut against the front end face of the towing plate 210 to prevent the mounting pin head 221 from disengaging from the pin shaft mounting hole 215, and the contact area between the locking plate 221a and the towing plate 210 is relatively large, with good shear resistance performance. It can not only improve the tensile load-bearing capacity of the towing connection device, but also has a simple overall structure and high stability. The locking plate 221a can be welded to the front end of the mounting pin head 221, or can be fixedly arranged at the front end of the mounting pin head 221 through a connecting piece.

[0042] In this embodiment, as shown in Figure 3 and Figure 5 , an elastic member mounting hole 211a penetrating in the front-back direction is further provided on the towing plate 210, a limiting groove is provided on the front end face of the towing head 220 or the rear end face of the locking plate 221a, and the towing connection device further includes an elastic pushing member 300 and a positioning ball 400. The elastic pushing member 300 is installed in the elastic member mounting hole 211a and is compressed between the locking plate 221a and the towing head 220, and the positioning ball 400 is located in the limiting groove and abuts against the elastic pushing member 300.

[0043] Referring to Figure 3, taking the front end face of the towing head 220 as an example where a limiting groove is provided, one end of the elastic pushing member 300 can abut against the limiting groove on the front end face of the towing head 220 through the first positioning ball 401, and the other end of the elastic pushing member 300 can abut against the rear end face of the locking plate 221a through the second positioning ball 402. Since the elastic pushing member 300 is in a compressed state, under the pushing action of the first positioning ball 401, the first positioning ball 401 can be pushed into the limiting groove, realizing the light-load locking of the towing head 220 relative to the towing plate 210, thereby preventing the towing head 220 from freely pivoting. When the ground is uneven and the towing head 220 is adjusted to pivot relative to the towing plate 210, the first positioning ball 401 will come out of the limiting groove and roll into contact with the front end face of the towing head 220. When the ground is flat and the towing head 220 is leveled, the first positioning ball 401 will fall back into the corresponding limiting groove again. Through the first positioning ball 401 and the limiting groove, it is convenient to realize the light-load locking and reset positioning of the towing head 220.

[0044] In some embodiments, the limiting groove for the first positioning ball 401 can also be provided on the locking plate 221a and adapted to the second positioning ball 402, or limiting grooves adapted to the first positioning ball 401 and the second positioning ball 402 are respectively provided on both the towing head 220 and the locking plate 221a.

[0045] In this embodiment, as Figure 3 and Figure 5 shown, the number of the elastic member mounting holes 211a is multiple, and the multiple elastic member mounting holes 211a are arranged at intervals along the circumferential direction of the pin shaft mounting hole 215.

[0046] Referring to Figure 3 , a plurality of elastic member mounting holes 211a are arranged at intervals along the circumferential direction of the pin shaft mounting hole 215, so that the light-load locking of the towing head 220 relative to the towing plate 210 at multiple pivoting angles can be realized and the locking effect can be increased, thereby improving the usability of the towing connection device. Of course, the number of the elastic member mounting holes 211a is not limited to the four shown in the figure, and can also be other numbers.

[0047] In this embodiment, as Figure 3 and Figure 5 shown, the towing plate 210 includes a seat body 210a and a baffle 214. The elastic member mounting holes 211a are provided on the seat body 210a, and a through hole 214a is provided on the baffle 214. The through hole 214a is arranged in front and rear alignment with the elastic member mounting holes 211a.

[0048] Referring to Figure 5, the baffle 214 is welded and arranged closely against the front side of the rear end plate 211 of the seat body 210a. The through hole 214a and the elastic member mounting hole 211a which are arranged in alignment together form a receiving channel for receiving and circumferentially limiting the elastic pushing member 300 and the positioning marbles 400. Among them, the mounting pin head 221 is welded and connected to the locking plate 221a after sequentially passing through the rear end plate 211 and the baffle 214.

[0049] In this embodiment, as Figures 2 to 5 shown, the seat body 210a is arranged in a U shape. The towing plate 210 further includes a reinforcing plate 213, and the reinforcing plate 213 is arranged closely against the inner edge of the U shape of the seat body 210a.

[0050] Refer to Figure 4 , the reinforcing plate 213 arranged closely against the inner edge of the U shape of the seat body 210a enables the seat body 210a to form a frame structure, thereby greatly improving the structural strength of the seat body 210a, and thus enhancing the reliability and load-bearing capacity of the towing connection device. In addition, the U-shaped structure design of the seat body 210a can improve the tensile load-bearing capacity of the towing connection device, thereby reducing the requirements for the material properties of the seat body 210a, and the seat body 210a with low material strength is easier to process.

[0051] In this embodiment, as Figure 2 shown, a plurality of adjustment holes 112a are provided at the rear end of the towing bracket 100, and the plurality of adjustment holes 112a are arranged at intervals in the up and down directions. A towing plate adjustment hole 212 is provided on the towing plate 210, and the towing plate adjustment hole 212 is used for selectively installing in alignment with the adjustment holes 112a.

[0052] Refer to Figure 2 , after the towing plate adjustment hole 212 is installed in alignment with the adjustment holes 112a at different heights, the height adjustment of the towing head 220 can be realized, thereby increasing the adaptability of the towing connection device to external towing devices with different height specifications.

[0053] In this embodiment, as Figure 2 shown, the towing connection device further includes a bracket locking pin 130, and the bracket locking pin 130 passes through the towing plate 210 and the towing bracket 100 via the towing plate adjustment hole 212 and the adjustment holes 112a.

[0054] Refer to Figure 2The towing bracket 100 includes L-shaped plates 110 that are spaced apart and arranged symmetrically in a transverse direction. The L-shaped plates 110 are connected by a connecting plate 120. The front plate 111 of the L-shaped plate 110 is formed with a fixing hole 111a that is opened in the front-rear direction. Adjustment holes 112a that are opened in the transverse direction are formed on the rear plate 112 of the L-shaped plate 110 and are spaced apart in sequence in the height direction. The towing plate 210 is arranged between the L-shaped plates 110, and a spacer 140 for stabilizing the transverse positioning of the towing plate 210 is also provided between the towing plate 210 and the towing bracket 100. The bracket locking pin 130 passes through the spacer 140, the towing bracket 100 and the towing plate 210 through the plug hole 141 of the spacer 140, the adjustment hole 112a and the towing plate adjustment hole 212, and then the towing plate 210 is fixed to the towing bracket 100.

[0055] In this embodiment, if Figure 2 , Figure 3 and Figure 5 As shown, there are multiple carriage adjustment holes 212 .

[0056] The design of aligning the plurality of drag plate adjustment holes 212 with the adjustment holes 112 a can ensure that the connection between the towing plate 210 and the towing bracket 100 is stable.

[0057] In this embodiment, if Figure 2 As shown, a handle 223 a is formed at the upper end of the pin shaft 223 .

[0058] See also Figure 2 The operator can quickly install and remove the pin shaft 223 through the handle 223a to facilitate the rapid connection and removal of the external towing equipment and the towing head 220.

[0059] Specifically, see Figure 5 The towing head 220 also includes a U-shaped towing head body 222. The towing head body 222 includes a first straight plate 222b, a front end plate 222a, and a second straight plate 222c connected in sequence. The first straight plate 222b and the second straight plate 222c are arranged in parallel and spaced apart from each other, and the first straight plate 222b and the second straight plate 222c are respectively formed with a first towing connection hole and a second towing connection hole that are arranged oppositely. The towing fixed end of the external towing device is plugged in between the first straight plate 222b and the second straight plate 222c. The operator can conveniently pass the pin 223 through the second towing connection hole, the pin hole of the towing fixed end, and the first towing connection hole in sequence through the handle 223a, and hinge the towing fixed end to the towing head body 222. Among them, the ends of the first straight plate 222b and the second straight plate 222c are set to be flared away from each other to facilitate the plugging of the towing fixed end with the towing head body 222.

[0060] The present application discloses a novel tractor. The tractor in a specific embodiment comprises:

[0061] a vehicle body; and

[0062] the above-mentioned towing connection device, wherein the towing bracket 100 is connected to the vehicle body, and the towing head 220 is used to be connected to an external towing device.

[0063] Specifically, the towing bracket 100 is detachably provided on the tractor through a fastener passing through the fixing hole 111a. Obviously, the tractor also has all the technical effects brought by the above-mentioned towing connection device, so it will not be elaborated here. Those skilled in the art can understand that the installation position of the towing connection device is not limited to the above-mentioned vehicle body, and can also be other positions such as a trailer.

[0064] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0065] In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0066] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean 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 application. In this specification, the schematic descriptions of the above terms do not necessarily refer 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 or examples described in this specification and the features of different embodiments or examples.

Claims

1. Trailer coupling device, characterized in that, The trailer connection device includes: A trailer bracket (100); A trailer plate (210) connected to the trailer bracket (100) and provided with a pin installation hole (215) penetrating in the front-rear direction; A trailer head (220) having a mounting pin head (221) at the front end and a trailer connection hole (224) at the rear end. The mounting pin head (221) passes forward through the pin installation hole (215) and can rotate within the pin installation hole (215); A locking plate (221a) for fixedly mounting at the front end of the mounting pin head (221); and A pin (223) inserted into the trailer connection hole (224).

2. The trailer connection device according to claim 1, wherein The trailer plate (210) is further provided with an elastic member installation hole (211a) penetrating in the front-rear direction. A limiting groove is provided on the front end face of the trailer head (220) or the rear end face of the locking plate (221a). The trailer connection device further includes an elastic pushing member (300) and a positioning ball (400). The elastic pushing member (300) is installed in the elastic member installation hole (211a) and is compressed between the locking plate (221a) and the trailer head (220). The positioning ball (400) is located in the limiting groove and abuts against the elastic pushing member (300).

3. The trailer connection device according to claim 2, characterized in that, The number of the elastic member installation holes (211a) is multiple, and the multiple elastic member installation holes (211a) are arranged at intervals along the circumferential direction of the pin installation hole (215).

4. The trailer connection device according to claim 2, wherein, The trailer plate (210) includes a seat body (210a) and a baffle (214). The elastic member installation hole (211a) is provided on the seat body (210a). A through hole (214a) is provided on the baffle (214), and the through hole (214a) is arranged in front-rear alignment with the elastic member installation hole (211a).

5. The trailer connection device according to claim 4, characterized in that, The seat body (210a) is arranged in a U shape. The trailer plate (210) further includes a reinforcing plate (213), and the reinforcing plate (213) is closely arranged along the inner edge of the U shape of the seat body (210a).

6. The trailer coupling device according to any one of claims 1 to 5, characterized in that A plurality of adjusting holes (112a) are provided at the rear end of the trailer bracket (100), and the plurality of adjusting holes (112a) are arranged at intervals in the up-down direction. A trailer plate adjusting hole (212) is provided on the trailer plate (210), and the trailer plate adjusting hole (212) is used for selectively aligning and installing with the adjusting holes (112a).

7. The trailer connection device according to claim 6, characterized in that, The trailer connection device further includes a bracket lock pin (130), and the bracket lock pin (130) passes through the trailer plate (210) and the trailer bracket (100) via the trailer plate adjusting hole (212) and the adjusting holes (112a).

8. The trailer connection device according to claim 7, characterized in that, The number of the trailer plate adjusting holes (212) is multiple.

9. The trailer coupling device according to any one of claims 1 to 5, characterized in that, A handle (223a) is formed at the upper end of the pin (223).

10. A tractor, characterized in that, Including: A vehicle body; And The trailer connection device according to any one of claims 1 to 9, wherein the trailer bracket (100) is connected to the vehicle body, and the trailer head (220) is used for connecting to an external trailer device.

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