Towed assembly, towing device and working machine

Abstract

This application relates to the field of agricultural machinery and discloses a trailer assembly, a trailer attachment, and a working machine. The trailer assembly includes: a trailer stop; a trailer head extending through the trailer stop in a front-to-back direction; a first elastic stop structure disposed between the front end of the trailer head and the front side of the trailer stop, such that the front end of the trailer head elastically stops backward against the front side of the trailer stop; and a second elastic stop structure disposed between the rear end of the trailer head and the rear side of the trailer stop, such that the rear end of the trailer head elastically stops forward against the rear side of the trailer stop. The trailer assembly, trailer attachment, and working machine of this application, by incorporating the first and second elastic stop structures, help eliminate axial free play between the trailer stop and the trailer head under non-towing conditions, improve service life, and reduce noise.

Description

Technical Field

[0001] This application belongs to the field of agricultural machinery technology, specifically relating to a trailer assembly, trailer device, and operating machinery. Background Technology

[0002] With the continuous expansion of agricultural mechanization, users' demands for tractor configurations are also increasing. Tractors are no longer just used as vehicles for field operations; when a trailer is attached, they also serve as a means of transporting grain and other goods. However, due to the significant shaking of tractors during operation, existing trailer-mounted systems generate considerable noise, severely impacting the work experience of operators. Summary of the Invention

[0003] The purpose of this application is to provide a trailer assembly, trailer device, and operating machinery that can effectively reduce noise during operation.

[0004] To achieve the above objectives, this application provides a trailer assembly comprising:

[0005] Trailer clips;

[0006] The trailer head is inserted into the trailer stop in the front-to-back direction;

[0007] A first elastic stop structure is provided between the front end of the towing head and the front side of the towing stop member so that the front end of the towing head elastically stops backward on the front side of the towing stop member.

[0008] A second elastic stop structure is provided between the rear end of the trailer head and the rear side of the trailer block so that the rear end of the trailer head elastically stops forward on the rear side of the trailer block.

[0009] In some specific embodiments, the trailer head includes a trailer section and a connecting shaft section. The connecting shaft section passes through the trailer stop. The first elastic stop structure is disposed on the axial front end of the connecting shaft section. The trailer section is connected to the axial rear end of the connecting shaft section and is located behind the trailer stop. The second elastic stop structure is disposed between the front end of the trailer section and the rear side of the trailer stop.

[0010] In some specific embodiments, the axial front end of the connecting shaft is provided with a first annular groove and a second annular groove arranged at intervals in the front-rear direction. The first elastic stop structure includes an elastic retaining ring, a fixed ring and an axial retaining ring. The elastic retaining ring is sleeved on the first annular groove and abuts against the front side of the towing stop in the axial direction. The fixed ring is sleeved on the radially outer side of the elastic retaining ring. The axial retaining ring is disposed on the second annular groove and located in front of the elastic retaining ring.

[0011] In some specific embodiments, the towing stop is provided with a mounting cylinder for the connecting shaft to pass through. The rear end face of the mounting cylinder wall is provided with a plurality of limiting holes spaced apart circumferentially. The second elastic stop structure includes a ball bearing and a second elastic reset member disposed in each of the limiting holes. The front end face of the towing part is provided with a plurality of circumferential limiting grooves spaced apart circumferentially. The plurality of circumferential limiting grooves are aligned with the plurality of limiting holes one to one. The connecting shaft is rotatably inserted into the mounting cylinder. The ball bearing can be engaged in the circumferential limiting groove under the elastic force of the second elastic reset member.

[0012] In some specific embodiments, the rear side of the tow stop is connected to a tow head, the tow stop has a side hole along its left-right side, and the upper part of the tow stop has an upper hole. The tow assembly further includes:

[0013] An operating handle is provided in the upper hole and can move in the vertical direction;

[0014] A locking element is disposed in the side hole and can extend out of the side hole in the left-right direction or retract into the side hole;

[0015] An intermediate transmission assembly is disposed on the towing stop, one end of the intermediate transmission assembly is connected to the inner end of the operating handle, and the other end is connected to the inner end of the locking member.

[0016] When the operating handle moves upward, the intermediate transmission assembly can drive the locking member to retract into the side hole; when the operating handle moves downward, the locking member can reset and extend out of the side hole.

[0017] In some specific embodiments, the intermediate transmission assembly may include:

[0018] A rotating linkage includes a first rod portion and a second rod portion connected to each other. A connecting portion between the first rod portion and the second rod portion is rotatably connected to the towing stop. The end of the first rod portion away from the connecting portion is provided with a first strip-shaped hole extending axially. The inner end of the operating handle is movably connected to the rotating linkage through a first pin movably disposed in the first strip-shaped hole. The end of the second rod portion away from the connecting portion is provided with a second strip-shaped hole extending axially. The inner end of the locking member is movably connected to the rotating linkage through a second pin movably disposed in the second strip-shaped hole.

[0019] A first elastic reset member is disposed in the side hole, one end of the first elastic reset member abuts against the towing stop member, and the other end of the first elastic reset member abuts against the inner end of the locking member.

[0020] In some specific embodiments, the locking member may be a locking pin, the inner end of the locking member includes a hollow cylindrical cavity, the first elastic reset member is inserted into the hollow cylindrical cavity, the upper and lower cylindrical walls of the hollow cylindrical cavity are respectively provided with clearance holes for the second rod to move, the front and rear cylindrical walls of the hollow cylindrical cavity are respectively provided with pin holes, and the second pin passes through the pin hole, the first elastic reset member and the second strip hole.

[0021] In some specific embodiments, the towing stop may have a central chamber and a side chamber that are isolated from each other. The central chamber is located in the middle of the towing stop, and the side chambers are arranged on the outside of the central chamber in a left-right direction. The first elastic stop structure is located in the central chamber, and the intermediate transmission assembly is arranged in the side chamber.

[0022] In some specific embodiments, the openings of the central chamber and the side chambers both face forward, and the towing device may also include a front cover plate, which is disposed on the front side of the towing stop and covers the central chamber and the side chambers.

[0023] In some specific embodiments, the operating handle may be a folding handle and include a folding rod and a vertical connecting rod, the lower end of the folding rod and the upper end of the vertical connecting rod being rotatably connected, and the lower end of the vertical connecting rod being connected to the intermediate transmission assembly.

[0024] A second aspect of this application provides a trailer hitch, the trailer hitch comprising:

[0025] The aforementioned trailer assembly;

[0026] A trailer support bracket is provided with a guide rail extending in the vertical direction. The guide rail is provided with a plurality of locking and limiting grooves arranged at intervals in the vertical direction. The side of the trailer stop cooperates with the guide rail and can move up and down along the guide rail. A locking member provided on the trailer stop can cooperate with the locking and limiting grooves for limiting.

[0027] In some specific embodiments, the towing device may further include a tow bar bracket and a tow bar, the tow bar being inserted through the towing support bracket in a front-to-back direction, the towing support bracket being provided with a support plate capable of supporting the tow bar, and the tow bar bracket being located in front of the towing support bracket and connected to the tow bar.

[0028] A third aspect of this application provides a work machine that includes the aforementioned towing device.

[0029] By using the above technical solution, by setting a first elastic stop structure and a second elastic stop structure between the trailer stop and the trailer head, the trailer head can be elastically stopped on the trailer stop in the front-to-back direction. This helps to eliminate the axial free clearance between the trailer stop and the trailer head when not towing. This not only reduces the swaying amplitude and noise, but also reduces the degree of collision damage between components during the operation of the machinery, thereby improving its service life.

[0030] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0032] Figure 1 A schematic diagram of the installation structure of the trailer and the rear axle housing according to a specific embodiment of this application is shown;

[0033] Figure 2 for Figure 1 A schematic diagram showing the disassembly and assembly of the trailer and the rear axle housing.

[0034] Figure 3 for Figure 1 Exploded view of the trailer assembly in the middle;

[0035] Figure 4 for Figure 3 A schematic diagram of the rotating link in the diagram;

[0036] Figure 5 for Figure 3 A schematic diagram of the locking mechanism in the middle;

[0037] Figure 6 for Figure 1 An exploded view of the trailer assembly from another perspective.

[0038] Explanation of reference numerals in the attached figures

[0039] 11 Trailer Stop 111 Side Hole

[0040] 112 upper hole 113 middle chamber

[0041] 114 Side chamber 115 Mounting cylinder

[0042] 116 limit holes, 12 trailer head

[0043] 121 Connecting shaft part 122 Trailer part

[0044] 1221 Circumferential limiting groove 13 Operating handle

[0045] 131 Folding rod 132 Vertical connecting rod

[0046] 133 Third pin 14 Locking part

[0047] 141 Hollow Cavity 142 Clearance Hole

[0048] 143 pin hole 151 rotating connecting rod

[0049] 1511 First strip hole; 1512 Second strip hole

[0050] 152 First pin 153 Second pin

[0051] 154 First elastic reset component 16 Front cover plate

[0052] 171 Elastic retaining ring 172 Fixed ring

[0053] 173 Axial retaining ring 181 Ball bearing

[0054] 182 Second elastic reset element 2 Trailer support bracket

[0055] 21 Guide rail section 22 Snap-fit ​​limiting hole

[0056] 3. Tow bar bracket 4. Tow bar

[0057] 5 Rear Axle Housings 1 Trailer Assembly Detailed Implementation

[0058] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0059] Existing trailer hitches typically rely on nuts for locking, resulting in significant axial clearance, easy wobbling, and high noise levels.

[0060] Therefore, such as Figure 3 and Figure 6 As shown, this application provides a novel trailer assembly, which includes a trailer stop 11, a trailer head 12, a first elastic stop structure, and a second elastic stop structure. The trailer head 12 is disposed in the trailer stop 11 in a front-to-back direction. The first elastic stop structure is disposed between the front end of the trailer head 12 and the front side of the trailer stop 11, so that the front end of the trailer head 12 elastically stops backward against the front side of the trailer stop 11. The second elastic stop structure is disposed between the rear end of the trailer head 12 and the rear side of the trailer stop 11, so that the rear end of the trailer head 12 elastically stops forward against the rear side of the trailer stop 11.

[0061] Thus, by providing a first elastic stop structure between the towing stop 11 and the towing head 12, the towing head 12 elastically stops backward on the towing stop 11, which helps eliminate the axial free clearance between the front end of the towing head 12 and the front side of the towing stop 11 when not towing. By providing a second elastic stop structure between the towing stop 11 and the towing head 12, the towing head 12 can elastically stop forward on the towing stop 11, which helps eliminate the axial free clearance between the rear end of the towing head 12 and the rear side of the towing stop 11 when not towing. By eliminating the axial clearance between the towing stop 11 and the towing head 12, it is possible to reduce the amplitude of swaying and noise, and also reduce the degree of collision damage between components during operation of the machinery, thereby increasing its service life.

[0062] It should be noted that the towing stop 11, the towing head 12, the first elastic stop structure, and the second elastic stop structure can have various structural forms. For example, the towing stop 11 can be a box-shaped structure or a solid structure; the towing structure of the towing head 12 can be a hook or a pin; the first elastic stop structure and the second elastic stop structure can each include elastic elements such as springs or elastic baffles. The first elastic stop structure and the second elastic stop structure can be respectively installed on the towing stop 11 or the towing head 12. These structural forms should also fall within the protection scope of this application.

[0063] In some specific implementations, such as Figure 3 and Figure 6 As shown, the trailer head 12 may include a trailer section 122 and a connecting shaft section 121. The connecting shaft section 121 passes through the trailer stop 11. A first elastic stop structure is disposed on the axial front end of the connecting shaft section 121. The trailer section 122 is connected to the axial rear end of the connecting shaft section 121 and is located behind the trailer stop 11. A second elastic stop structure is disposed between the front end of the trailer section 122 and the rear side of the trailer stop 11. This makes the structure of the trailer assembly more reasonable and simple.

[0064] In some specific implementations, such as Figure 3 and Figure 6 As shown, the axial front end of the connecting shaft portion 121 is provided with a first annular groove and a second annular groove arranged at intervals along the front-rear direction. The first elastic stop structure includes an elastic retaining ring 171, a fixed ring 172, and an axial retaining ring 173. The elastic retaining ring 171 is sleeved on the first annular groove and abuts against the front side of the towing stop 11 axially and rearward. The fixed ring 172 is sleeved on the radially outer side of the elastic retaining ring 171. The axial retaining ring 173 is disposed on the second annular groove and located in front of the elastic retaining ring 171.

[0065] The elastic retaining ring 171 can be a split spring retaining ring, a round flat retaining ring, or a spring pressure plate, etc., used to eliminate the axial clearance between the axial front end of the trailer head 12 and the front side of the trailer stop 11. The fixing ring 172 is fitted radially outside the elastic retaining ring 171 to radially limit the elastic retaining ring 171, fixing it radially onto the first annular groove. The axial retaining ring 173 axially limits the elastic retaining ring 171 and the fixing ring 172, preventing the trailer head 12 from disengaging from the trailer stop 11. By providing the elastic retaining ring 171, the fixing ring 172, and the axial retaining ring 173, the required strength for towing a trailer can be provided, while completely eliminating axial free clearance under non-towing conditions, which helps to improve the service life of the trailer assembly 1 and effectively reduce noise.

[0066] In some specific implementations, such as Figure 3 and Figure 6 As shown, the towing stop 11 has a mounting cylinder 115 through which the connecting shaft 121 passes. The rear end face of the mounting cylinder 115 has multiple circumferentially spaced limiting holes 116, each containing a ball bearing 181 and a second elastic return member 182. The second elastic stop structure includes the ball bearing 181 and the second elastic return member 182 disposed in each limiting hole. The front end face of the towing part 122 has multiple circumferentially spaced limiting grooves 1221, which are aligned one-to-one with the limiting holes 116. The connecting shaft 121 is rotatably inserted into the mounting cylinder 115, and the ball bearing 181 can be engaged in the circumferentially spaced grooves 1221 under the elastic force of the second elastic return member 182.

[0067] Thus, compared to traditional fixed trailers, the trailer assembly 1 of this application can achieve 360° free rotation. When a tractor tows a trailer, on roads with poor conditions, the trailer and tractor are often in a state of relative torsion. The trailer assembly 1 of this application can adapt well to this working condition, especially in emergencies such as trailer rollover. Because the trailer assembly 1 can rotate 360°, the tractor will not roll over due to the trailer overturning, thereby improving driver safety. Furthermore, the trailer head 12 and the trailer stop 11 of this application adopt an elastic positioning structure combining a second elastic reset member 182 and a ball bearing 181, which can realize the rotational positioning function of the trailer assembly 1. At the same time, the second elastic reset member 182 also has the function of eliminating axial clearance. The trailer assembly 1 will not rotate arbitrarily, making it safer to use and preventing unnecessary noise due to vehicle vibration. Among them, the ball bearing 181 can be a steel ball or other metal ball bearing.

[0068] Existing towing equipment typically uses rotary control handles, requiring operators to perform both rotational and vertical movements. Because the direction of force for unlocking by rotation differs from that for lifting and adjusting, this design is ergonomically unsound when operating with one hand, making the handle prone to slippage and compromising safety and stability.

[0069] In view of this, such as Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the tow truck assembly of this application also includes an operating handle 13, a locking member 14, and an intermediate transmission assembly disposed on the tow stop 11. The tow stop 11 has a side hole 111 on its side in the left-right direction, and the operating handle 13 is disposed in an upper hole 112 and can move in the up-down direction. The upper part of the tow stop 11 has an upper hole 112, and the locking member 14 is disposed in the side hole 111 and can extend out of the side hole 111 in the left-right direction or retract into the side hole 111. The intermediate transmission assembly is disposed on the tow stop 11, with one end connected to the inner end of the operating handle 13 and the other end connected to the inner end of the locking member 14.

[0070] Specifically, when the operating handle 13 moves upward, the intermediate transmission assembly can drive the locking member 14 to retract into the side hole 111; when the operating handle 13 moves downward, the locking member 14 can reset and extend out of the side hole 111. Thus, since the intermediate transmission assembly can drive the locking member 14 to retract into the side hole 111 when the operating handle 13 moves upward, the operator can unlock the locking member 14 simply by lifting the operating handle 13 upward. This makes the unlocking force direction of the trailer assembly the same as the lifting adjustment force direction, making the use of the trailer assembly more ergonomic and the operation safer and more stable.

[0071] It should be noted that the shape and structure of the operating handle 13, the locking element 14 and the intermediate transmission assembly can be varied. For example, the operating handle 13 can be a folding handle or a regular handle, the locking element 14 can be a solid cylinder or other irregular shape, and the intermediate transmission assembly can be a linkage structure or a pulley traction rope structure. These structural forms should also fall within the protection scope of this application.

[0072] In some specific implementations, such as Figure 3 and Figure 6 As shown, the intermediate transmission assembly may include a rotating connecting rod 151 and a first elastic reset member 154. The rotating connecting rod 151 may include a first rod portion and a second rod portion connected to each other, and the angle between the central axis of the first rod portion and the central axis of the second rod portion may be acute. The connection between the first rod portion and the second rod portion is rotatably connected to the towing stop member 11, such as... Figure 4As shown, the connecting part between the first rod and the second rod is provided with a rotating pin hole. The rotating connecting rod 151 is rotatably connected to the towing stop 11 through a rotating pin shaft passing through the rotating pin hole, that is, the rotating connecting rod 151 can rotate around the rotating pin shaft.

[0073] The end of the first rod portion away from the connecting portion has a first axially extending slot 1511. The inner end of the operating handle 13 is movably connected to the rotating connecting rod 151 via a first pin 152 movably disposed in the first slot 1511. That is, the first pin 152 passes through the inner end of the operating handle 13 and the first slot 1511 respectively, and can move in the first slot 1511 along the extending direction of the first slot 1511. The end of the second rod portion away from the connecting portion has a second axially extending slot 1512. The inner end of the locking member 14 is movably connected to the rotating connecting rod 151 via a second pin 153 movably disposed in the second slot 1512. That is, the second pin 153 passes through the inner end of the locking member 14 and the second slot 1512 respectively, and can move in the second slot 1512 along the extending direction of the second slot 1512. Here, "inner" refers to the position relatively close to the center point of the trailer block 11, and "outer" refers to the position relatively far away from the center point of the trailer block 11.

[0074] Thus, as Figure 3 and Figure 6 As shown, when the operator lifts the operating handle 13 upwards, the first rod drives the rotating connecting rod 151 to rotate, and the second rod drives the locking member 14 to move inwards to retract into the side hole 111, thereby realizing the unlocking function by applying force in the vertical direction.

[0075] Furthermore, a first elastic reset member 154 is disposed in the side hole 111, with one end of the first elastic reset member 154 abutting against the towing stop member 11 and the other end abutting against the inner end of the locking member 14. Thus, when the operating handle 13 moves upward, the locking member 14 retracts into the side hole 111 and compresses the first elastic reset member 154; when the operating handle 13 moves downward, the first elastic reset member 154 resets and pushes the locking member 14 to extend back out of the side hole 111, making up-down adjustment quick and convenient.

[0076] Optionally, such as Figure 5 As shown, the locking member 14 can be a locking pin. The inner end of the locking member 14 includes a hollow cylindrical cavity 141. The first elastic reset member 154 is inserted into the hollow cylindrical cavity 141. The upper and lower cylindrical walls of the hollow cylindrical cavity 141 are respectively provided with clearance holes 142 for the second rod to move. The front and rear cylindrical walls of the hollow cylindrical cavity 141 are respectively provided with pin holes 143. The second pin 153 passes through the pin hole 143, the first elastic reset member 154, and the second strip hole 1512.

[0077] Alternatively, in some other embodiments, the intermediate transmission assembly may include a traction rope, a fixed pulley, and an elastic reset member. The two ends of the traction rope are connected to the inner ends of the operating handle 13 and the locking member 14, respectively, and are wound around the fixed pulley. The elastic reset member is disposed in the side hole 111, with one end abutting against the towing stop 11 and the other end abutting against the inner end of the locking member 14. Thus, when the operating handle 13 moves upward, the traction rope pulls the locking member 14 back into the side hole 111 and compresses the elastic reset member; when the operating handle 13 moves downward, the elastic reset member resets and pushes the locking member 14 back out of the side hole 111, thus achieving the unlocking function by force in the vertical direction.

[0078] Optionally, the trailer stop 11 has a central chamber 113 and side chambers 114 that are isolated from each other. The central chamber 113 is located in the middle of the trailer stop 11, and the side chambers 114 are arranged on the outside of the central chamber 113 in a left-right direction. The front end of the trailer head 12 passes through the central chamber 113, and the intermediate transmission assembly is arranged in the side chambers 114. Figure 3 As shown, the tow stop 11 includes a central chamber 113 and two side chambers 114. A side chamber 114 is located on each of the left and right sides of the central chamber 113. The three chambers are isolated from each other and do not affect each other. The top of the tow stop 11 has an upper hole 112 on each of its left and right sides. The two inner ends of the operating handle 13 extend into the two upper holes 112 respectively, and the two upper holes 112 communicate with the two side chambers 114 respectively. Each side chamber 114 has an intermediate transmission assembly, and the two inner ends of the operating handle 13 are connected to the intermediate transmission assemblies in the two side chambers 114 respectively. Two side holes 111 communicate with the two side chambers 114 respectively, and the inner ends of the locking members 14 in the side holes 111 on the left and right sides of the tow stop 11 are connected to the intermediate transmission assemblies in the two side chambers 114 respectively. In this way, the intermediate transmission assembly is located in the side chamber 114, which avoids damage or jamming during use and makes the structure more reliable.

[0079] Optionally, the openings of the central chamber 113 and the side chambers 114 both face forward. The trailer assembly 1 also includes a front cover plate 16, which is disposed on the front side of the trailer stop 11 and covers the central chamber 113 and the side chambers 114. In this way, the intermediate transmission assembly and its associated motion mechanism can be sealed to prevent exposure to harsh working environments and to prevent jamming or damage caused by mud, iron filings, or other factors.

[0080] In some specific implementations, such as Figure 3 and Figure 6As shown, the mounting cylinder 115 is connected to the central chamber 113. The axial front end of the connecting shaft 121, the elastic retaining ring 171, the fixing ring 172 and the axial retaining ring 173 are set in the central chamber 113, which can avoid exposure to harsh working environment and prevent damage caused by factors such as mud and iron filings.

[0081] In some specific implementations, such as Figure 3 and Figure 6 As shown, the operating handle 13 can be a folding handle and includes a folding rod 131 and two vertical connecting rods 132. The folding rod 131 is inverted U-shaped, and its two lower ends are rotatably connected to the upper ends of the two vertical connecting rods 132 via third pins 133. The lower ends of the two vertical connecting rods 132 are respectively connected to two intermediate transmission components. In this way, the structure of the towing assembly 1 can be made more compact and reasonable, and the operating handle 13 is a hand-held control lever, which can realize one-handed operation.

[0082] A second aspect of this application also provides a trailer hitch, which includes the aforementioned trailer assembly 1. Since the trailer hitch includes the aforementioned trailer assembly 1, it also possesses all the technical effects brought about by the trailer assembly 1, and therefore will not be repeated.

[0083] Optionally, the towing device further includes a towing support bracket 2. The towing support bracket 2 may have a guide rail portion 21 extending in the vertical direction. The guide rail portion 21 has a plurality of locking and limiting holes 22 spaced apart in the vertical direction. The side of the towing stop 11 engages with the guide rail portion 21 and can move vertically along the guide rail portion 21. The locking member 14 can engage with the locking and limiting holes 22 for limiting. Figure 1 and Figure 2 As shown, the tow support bracket 2 includes a left longitudinal frame and a right longitudinal frame that can be connected to the rear axle housing 5 and are spaced apart from each other. Guide rails 21 are respectively provided on the inner sides of the left and right longitudinal frames, and the two sides of the tow stop 11 cooperate with the two guide rails 21. When the operating handle 13 is pulled up, the locking members 14 on both sides of the tow assembly 1 retract into the side holes 111, allowing the tow assembly 1 to move up and down along the guide rails 21 to adjust its height. When the locking members 14 on both sides of the tow assembly 1 extend out of the side holes 111, the tow assembly 1 can be locked onto the locking limit holes 22, thereby achieving positional fixation in the vertical direction.

[0084] In some specific embodiments, the towing device may further include a tow bar bracket 3 and a tow bar 4, with the tow bar 4 passing through the towing support bracket 2 in the front-to-back direction. For example... Figure 1 and Figure 2As shown, the trailer support bracket 2 is equipped with a support plate and a limiting plate. The limiting plate is located above the support plate, and the limiting plate and the support plate are respectively connected between the bottom of the left longitudinal frame and the right longitudinal frame. The tow rod 4 passes through the guide space formed by the support plate, the left longitudinal frame, the limiting plate, and the right longitudinal frame in the front-to-back direction. The support plate can support the tow rod 4, making the force on the tow rod 4 more even, increasing the overall strength of the towing structure, and effectively improving the performance of the towing structure. The limiting plate can limit the tow rod 4 and the trailer assembly 1 respectively. The tow rod bracket 3 is located in front of the trailer support bracket 2 and is assembled and connected to the tow rod 4 through a pin. The tow rod 4 can achieve axial telescopic attachment of trailers, which can meet the needs of different types of trailers. The tow rod bracket 3 is used for fixing. This trailer assembly 1 is suitable for transportation or operation, such as transporting agricultural products and farming. The towing structure is suitable for situations that require towing operating equipment, such as towing rice transplanters, plows, etc. for agricultural operations.

[0085] Optionally, elastic buffer plates may be provided on the support plate, left longitudinal frame, limit plate and right longitudinal frame that are relatively close to the tow rod 4, so as to reduce the degree of collision damage between the tow rod 4 and the towing support bracket 2, and further reduce the operating noise of the towing device and improve the service life of the components.

[0086] A third aspect of this application also provides a work machinery comprising the aforementioned trailer. Since the work machinery includes the aforementioned trailer, it also possesses all the technical effects brought about by the trailer, and therefore will not be repeated. This work machinery is primarily used as agricultural work machinery, but can also be used as engineering work machinery. Agricultural work machinery may include, for example, tractors and harvesters.

[0087] Optionally, such as Figure 1 and Figure 2 As shown, the working machinery also includes a rear axle housing 5, a trailer support bracket 2, and a drawbar bracket 3, which are respectively mounted on the rear axle housing 5 of the tractor.

[0088] It should be noted that the structure of the rear axle housing 5 is well known to those skilled in the art and is not part of the core improvement of this application, so it will not be described in detail here.

[0089] The working principle of the towing device of this application will be briefly explained below: Folding the operating handle 13 vertically upwards and lifting it causes the vertical connecting rod 132 to drive the rotating connecting rod 151 to rotate around the rotating pin. The locking member 14 moves left and right, compressing the first elastic reset member 154. When the locking member 14 is fully retracted into the side hole 111, the towing assembly 1 can move up and down along the double-sided slide rails on the towing support bracket 2. After moving to the predetermined position, holding the towing assembly 1 with one hand and releasing the operating handle 13 with the other, the locking member 14 is pushed out by the first elastic reset member 154 and enters the locking and limiting holes 22 of the left and right longitudinal frames, completing the position adjustment. Folding the operating handle 13 by 90° saves more space.

[0090] In summary, the unlocking force direction of the tow assembly in this application is the same as the lifting and adjusting force direction, which is more ergonomic and makes operation safer and more stable. The tow head 12 and the tow stop 11 of this application employ an elastic positioning structure combining a second elastic reset member 182 and a ball bearing 181, enabling 360° free rotation and rotational positioning of the tow assembly 1. Simultaneously, the second elastic reset member 182 also eliminates axial clearance, preventing the tow assembly 1 from rotating arbitrarily, thus enhancing safety and eliminating unnecessary noise due to vehicle vibration. Furthermore, by providing a sealed chamber in the tow stop 11, the moving mechanism is completely sealed, preventing jamming or damage caused by mud, metal filings, etc., resulting in a more stable and reliable structure.

[0091] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A trailer assembly, characterized in that, include: Trailer stop (11); The trailer head (12) is inserted into the trailer stop (11) in the front-to-back direction; A first elastic stop structure is provided between the front end of the towing head (12) and the front side of the towing stop (11) so that the front end of the towing head (12) elastically stops backward on the front side of the towing stop (11). The second elastic stop structure is provided between the rear end of the towing head (12) and the rear side of the towing stop (11) so that the rear end of the towing head (12) is elastically stopped forward on the rear side of the towing stop (11). The trailer head (12) includes a trailer part (122) and a connecting shaft part (121). The axial front end of the connecting shaft (121) is provided with a first annular groove and a second annular groove arranged at intervals in the front-rear direction. The first elastic stop structure includes an elastic retaining ring (171), a fixed ring (172) and an axial retaining ring (173). The elastic retaining ring (171) is sleeved on the first annular groove and abuts against the front side of the towing stop (11) in the axial direction. The fixed ring (172) is sleeved on the radial outer side of the elastic retaining ring (171). The axial retaining ring (173) is disposed on the second annular groove and located in front of the elastic retaining ring (171). The towing stop (11) is provided with an installation cylinder (115) through which the connecting shaft (121) passes. The rear end face of the cylinder wall of the installation cylinder (115) is provided with a plurality of limiting holes (116) spaced apart in the circumferential direction. The second elastic stop structure includes a ball (181) and a second elastic reset member (182) disposed in each of the limiting holes. The front end face of the towing part (122) is provided with a plurality of circumferential limiting grooves (1221) spaced apart in the circumferential direction. The plurality of circumferential limiting grooves (1221) are aligned with the plurality of limiting holes (116) one by one. The connecting shaft (121) is rotatably inserted into the installation cylinder (115). The ball (181) can be engaged in the circumferential limiting groove (1221) under the elastic force of the second elastic reset member (182).

2. The trailer assembly according to claim 1, characterized in that, The connecting shaft (121) passes through the towing stop (11), the first elastic stop structure is disposed on the axial front end of the connecting shaft (121), the towing part (122) is connected to the axial rear end of the connecting shaft (121) and is located behind the towing stop (11), and the second elastic stop structure is disposed between the front end of the towing part (122) and the rear side of the towing stop (11).

3. The trailer assembly according to claim 1, characterized in that, The tow stop (11) has a side hole (111) on its side in the left-right direction, and an upper hole (112) on its upper part. The tow assembly also includes: An operating handle (13) is provided in the upper hole (112) and can move in the vertical direction; A locking member (14) is provided in the side hole (111) and can extend out of the side hole (111) in the left and right directions or retract into the side hole (111); An intermediate transmission assembly is provided on the towing stop (11). One end of the intermediate transmission assembly is connected to the inner end of the operating handle (13), and the other end is connected to the inner end of the locking member (14). When the operating handle (13) moves upward, the intermediate transmission assembly can drive the locking member (14) to retract into the side hole (111); when the operating handle (13) moves downward, the locking member (14) can reset and extend out of the side hole (111).

4. The trailer assembly according to claim 3, characterized in that, The intermediate transmission assembly includes: The rotating link (151) includes a first rod portion and a second rod portion connected to each other. The connecting portion between the first rod portion and the second rod portion is rotatably connected to the towing stop (11). The end of the first rod portion away from the connecting portion is provided with a first strip hole (1511) extending axially. The inner end of the operating handle (13) is movably connected to the rotating link (151) through a first pin (152) movably disposed in the first strip hole (1511). The end of the second rod portion away from the connecting portion is provided with a second strip hole (1512) extending axially. The inner end of the locking member (14) is movably connected to the rotating link (151) through a second pin (153) movably disposed in the second strip hole (1512). A first elastic reset member (154) is disposed in the side hole (111). One end of the first elastic reset member (154) abuts against the tow block (11), and the other end of the first elastic reset member (154) abuts against the inner end of the locking member (14).

5. The trailer assembly according to claim 4, characterized in that, The locking member (14) is a locking pin. The inner end of the locking member (14) includes a hollow cylinder cavity (141). The first elastic reset member (154) is inserted into the hollow cylinder cavity (141). The upper and lower cylinder walls of the hollow cylinder cavity (141) are respectively provided with clearance holes (142) for the second rod to move. The front and rear cylinder walls of the hollow cylinder cavity (141) are respectively provided with pin holes (143). The second pin (153) passes through the pin hole (143), the first elastic reset member (154) and the second strip hole (1512).

6. The trailer assembly according to claim 3, characterized in that, The towing stop (11) has a central chamber (113) and a side chamber (114) that are isolated from each other. The central chamber (113) is located in the middle of the towing stop (11), and the side chamber (114) is arranged on the outside of the central chamber (113) in the left-right direction. The first elastic stop structure is located in the central chamber (113), and the intermediate transmission assembly is arranged in the side chamber (114).

7. The trailer assembly according to claim 6, characterized in that, The openings of the central chamber (113) and the side chamber (114) both face forward. The trailer assembly (1) also includes a front cover plate (16), which is located on the front side of the trailer stop (11) and covers the central chamber (113) and the side chamber (114).

8. The trailer assembly according to claim 3, characterized in that, The operating handle (13) is a folding handle and includes a folding rod (131) and a vertical connecting rod (132). The lower end of the folding rod (131) and the upper end of the vertical connecting rod (132) are rotatably connected, and the lower end of the vertical connecting rod (132) is connected to the intermediate transmission assembly.

9. A towing device, characterized in that, The towing device includes: The trailer assembly (1) is claimed in any one of claims 1 to 8; The towing support bracket (2) is provided with a guide rail (21) extending in the vertical direction. The guide rail (21) is provided with a plurality of locking and limiting holes (22) spaced apart in the vertical direction. The side of the towing stop (11) cooperates with the guide rail (21) and can move up and down along the guide rail (21). The locking member (14) provided on the towing stop (11) can be locked and cooperated with the locking and limiting holes (22).

10. The towing device according to claim 9, characterized in that, The towing device also includes a tow bar bracket (3) and a tow bar (4). The tow bar (4) is inserted in the towing support bracket (2) in the front-to-back direction. The towing support bracket (2) is provided with a support plate that can support the tow bar (4). The tow bar bracket (3) is located in front of the towing support bracket (2) and connected to the tow bar (4).

11. A type of operating machinery, characterized in that, Includes the towing device according to claim 9 or 10.

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