Trailer

Abstract

To improve the usability of an inertial brake.SOLUTION: A trailer according to the present invention includes a traction rod that connects the trailer and a tractor, an elastic extendable member and a hydraulic brake. With a travelling direction defined as a forward direction, when the tractor applies brake, the traction rod moves backwardly while receiving resistance due to reaction force by the elastic extendable member so as to ease shock due to the braking of the tractor. The elastic extendable member is directly or indirectly attached to the traction rod, and connects between the traction rod and the hydraulic brake. The hydraulic brake produces braking force in accordance with the movement of the traction rod.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to trailers towed by general-purpose vehicles, agricultural tractors, etc. Trailers for transporting heavy loads include those for loading boats, those with general-purpose beds, camper trailers, etc. Agricultural trailers in particular are often used to load heavy agricultural machinery such as combine harvesters and transport them to fields. [Background technology]

[0002] Conventionally, trailers for transporting heavy loads are equipped with an inertia brake that applies a brake to slow down the speed of a tractor (general vehicle or agricultural tractor) when the tractor slows down, as described in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 49-58021 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional inertia brakes have problems with usability, such as a slight lag time occurring when the tractor slows down before the inertia brake is activated, and difficulty in adjusting the effectiveness of the inertia brake.

[0005] An object of the present invention is to improve the usability of inertia brakes. [Means for solving the problem]

[0006] The present invention has a towing rod for connecting a trailer and a tractor, an elastic expansion member, and a hydraulic brake, The problem was solved by providing a trailer characterized in that, when the towing rod is traveling forward and the tractor applies the brakes, it moves rearward while receiving resistance from the reaction force of the elastic, expandable member, thereby absorbing the shock caused by the braking of the tractor, the elastic, expandable member being attached directly or indirectly to the towing rod and connecting the towing rod and the hydraulic brake, and the hydraulic brake generating a braking force due to the movement of the towing rod. [Effects of the Invention]

[0007] The trailer of the present invention is easier to use than conventional trailers. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of an agricultural trailer according to an embodiment. [Figure 2] Figure 2 is an explanatory diagram of the towing rod. Figure 2(A) is an enlarged view of the area around the towing rod, and Figure 2(B) is an enlarged view of the area within the frame A in Figure 2(A). [Figure 3] FIG. 3 is an explanatory diagram of the inertia brake mechanism during driving. [Figure 4] FIG. 4 is an explanatory diagram of the inertia brake mechanism during braking. [Figure 5] FIG. 5 is an explanatory diagram of the parking brake. [Figure 6] FIG. 6 is an explanatory diagram of the inertia brake stopping device, where FIG. 6(A) shows the state before the inertia brake stopping device is activated, and FIG. 6(B) shows the state after the inertia brake stopping device is activated. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals in different drawings denote parts with the same functions, and duplicated descriptions in each drawing will be omitted as appropriate.

[0010] [Example] The trailer 2 in the embodiment will be described as an agricultural trailer 2, but it can be used to load anything and is not limited to agricultural use.

[0011] (Overall composition) Fig. 1 is a perspective view of an agricultural trailer 2 according to the embodiment. The trailer 2 is provided with a towing rod 32 and a towing frame 3 at the front, and a loading platform 21 is supported by frames (not shown) extending from the pair of towing frames 3 on the left and right. The pair of left and right towing frames 3 have their front ends firmly fixed to towing frame end members 31 to form a towing frame body. The "right (R)" and "left (L)" shown in Figure 1 refer to the right (R) and left (L) when the tractor (trailer 2) is moving forward, with the forward (F) direction. B represents the rear. The towing rod 32 and towing frame 3 are components that exist regardless of the type of trailer 2. There are a pair of towing frames 3, one on the left and one on the right, and their front ends are connected by towing frame end members 31 to form a strong frame. A pair of wheels 22 on the left and right are provided below the loading platform 21 to support the loading platform 21. The wheels 22 are fitted with a braking portion (not shown) of a parking brake mechanism (hydraulic brake) 7, which will be described later. The towing rod 32 is connected to the agricultural tractor and serves to connect the agricultural tractor and the trailer 2.

[0012] A parking stand 23 is attached to the towing frame 3. The parking stand 23 supports the loading platform 21 with a pair of wheels 22 and the parking stand 23 to prevent it from tilting when the trailer 2 is separated from the tractor.

[0013] Reference numeral 72 denotes a parking brake lever, which is a part of the parking brake mechanism (hydraulic brake) 7 that operates hydraulically. The main body that is responsible for the hydraulic device of the parking brake mechanism (hydraulic brake) 7 is visible in the figure, marked with the symbol 7. When the parking brake lever 72 is operated, it brakes the wheels 22, preventing accidents such as the trailer 2 starting to move up a slope when the trailer 2 is detached from the tractor. For safety reasons, the user should always activate the parking brake mechanism (hydraulic brake) 7 when the trailer 2 is detached, regardless of whether or not the vehicle is parked on a slope.

[0014] (traction rod) FIG. 2 is an explanatory diagram of the towing rod 32. FIG. 2(A) is an enlarged view of the area around the towing rod 32. Some components of the towing frame 3, such as parts that would interfere with the explanation, have been omitted and are not shown. The towing rod 32 has a hitch portion 34 at its front end, and is connected to a tractor. The towing rod 32 is a cylindrical member extending from the hitch portion 34 to the towing rod's rear end 321. The towing rod 32 is designed to move in the front-to-rear direction, and a guide tube 311 is attached inside the towing frame end member 31 to enable the towing rod 32 to slide smoothly back and forth. The towing rod 32 is housed inside the guide tube 311 so that it can slide freely. As shown in FIG. 2(A), most of the guide tube 311 is housed inside the towing frame end member 31, with the guide tube tip 3111 slightly protruding from the front end of the towing frame end member 31. The towing rod 32 slides in the front-to-rear direction while being guided by a guide tube 311. Normally, since the towing rod 32 is towed by a tractor, the towing rod 32 is located in the position shown in the figure, but when the tractor brakes, the towing rod 32 slides rearward while being guided by the guide tube 311 as if being pushed by the tractor, and the towing rod rear end 321 moves rearward.

[0015] (Elastic expansion and contraction member (gas spring)) The elastic expansion / contraction member (gas spring) 49 and the S-shaped member (intermediate member) 48 will be described later, but the elastic expansion / contraction member (gas spring) 49, which is the main component of the inertia brake, is located behind the rear end 321 of the towing rod. The elastic expansion / contraction member (gas spring) 49 serves to mitigate the movement of the towing rod 32, which slides rearward when the tractor brakes, and to transmit the movement of the towing rod 32 to the parking brake 7 (hydraulic brake) 7. The elastic expansion and contraction member (gas spring) 49 also absorbs minute fluctuations in the speed of the tractor, and acts to prevent the hydraulic brake 7 from being applied due to minute fluctuations in speed. The elastic expansion / contraction member 49 may be a coil spring, but a gas spring is preferable. A gas spring has a lower spring constant than a coil spring, so it generates a nearly constant spring force over a long stroke, and can be installed in the small space of the towing frame end member 31 at the front of the trailer 2.

[0016] (Range of tow rod movement) FIG. 2(B) is an enlarged view of the area enclosed by the frame A in FIG. 2(A). A towing rod return device mounting ring 43 is slidably fitted onto the towing rod 32 near the hitch portion 34 of the towing rod 32. A sliding ring stopper 33 is attached between the towing rod return device mounting ring 43 and the hitch portion 34 to prevent the towing rod return device mounting ring 43 from hitting the hitch portion 34. The towing rod return device mounting ring 43 has guide pieces 45 on the sides, and the guide pieces 45 pass through guide grooves 451 provided at the tip of the towing frame end member 31 and enter the towing frame end member 31. Because the guide pieces 45 pass through the guide grooves 451, the towing rod return device mounting ring 43 moves smoothly in conjunction with the movement of the towing rod 32.

[0017] (Traction rod return device) The towing rod return device mounting ring 43 has an attachment piece 431 fixed to its outer periphery. The attachment piece 431 serves to fix the piston rod 44 of the towing rod return device 42. The cylinder 46 of the towing rod return device 42 is fixed inside the towing frame end member 31. Therefore, the cylinder 46 of the towing rod return device 42 does not move. The towing rod return device 42 is arranged so that only the piston rod 44 can expand and contract. When the inertia brake mechanism 4 is activated, it serves to return the retracted towing rod 32 to its original position. The towing rod return device 42 is an elastic member such as a spring.

[0018] The range in which the towing rod 32 can move is limited to the range of the gap 39 formed between the towing rod return device mounting ring 43 and the guide tube tip 3111. The width of the gap 39 is determined according to the maximum braking force expected of the tractor. When the tractor brakes suddenly, the guide tube tip 3111 comes into contact with the towing rod return device mounting ring 43, preventing the towing rod 32 from moving further rearward, thereby serving as a limiter for the inertia brake mechanism 4 that is activated by the backward movement of the towing rod 32.

[0019] [1 Inertia braking during driving] 3 is an explanatory diagram of the inertia brake mechanism 4 during running. Members not necessary for the explanation are not shown. The inertia brake mechanism 4 of the embodiment includes, as main components, an elastic expansion / contraction member (gas spring) 49, a parking brake mechanism (hydraulic brake) 7 including a parking brake lever 72, and a towing rod 32. In the embodiment, the parking brake mechanism is employed as the hydraulic brake 7, but it is preferable that the hydraulic brake 7 is a hydraulic brake 7 independent of the parking brake mechanism.

[0020] (traction rod) The hitch portion 34 at the front end of the towing rod 32 is connected to the tractor and is constantly pulled in the direction of the arrow when the tractor is traveling unless the tractor slows down. The towing rod 32 is housed in a guide tube 311 inside the towing frame end member 31 and is guided by the guide tube 311 so that it can move back and forth.

[0021] (S-shaped member) The elastic expansion / contraction member (gas spring) 49 of the embodiment shown in Fig. 3 is directly or indirectly attached to the rear end 321 of the towing rod. The S-shaped member (indirect member) 48 of the embodiment is a member used in the example of indirect attachment. In the embodiment, the S-shaped member (indirect member) 48 is capable of swinging freely around the base end as an axis, and moves the elastic expansion / contraction member (gas spring) 49 in conjunction with the movement of the traction rod 32. The movement of the elastic expansion / contraction member (gas spring) 49 activates the hydraulic brake 7. The joint member is not limited to the S-shaped member 48 shown in the embodiment, and any shape, structure, or material may be used as long as it can perform the above-mentioned operations.

[0022] The S-shaped member (intermediate member) 48 of the embodiment will be specifically described below. In this embodiment, an S-shaped member (indirect member) 48 is positioned rearward of the towing frame end member 31. As shown in Fig. 3, the S-shaped member (indirect member) has a mounting plate 47 attached to the towing frame end member 31, the rear end of which supports the base end of the S-shaped member (indirect member) 48 so that it can rotate freely back and forth. The S-shaped member (indirect member) 48 has a bent portion 481 that protrudes forward, and comes into contact with the towing rod rear end 321 during braking.

[0023] Furthermore, the trailer 2 or the tractor may roll due to unevenness in the road. To absorb this, the towing rod 32 is configured to allow rotation. Furthermore, the embodiment is configured so that the rotation of the towing rod 32 is not transmitted to members or mechanisms located behind the S-shaped member (intermediate member) 48. There are various possible structures for preventing the rotation of the towing rod 32 from being transmitted to the S-shaped member (intermediate member) 48. As one example, the embodiment employs a structure that supports the base end of the S-shaped member (intermediate member) 48 so that the S-shaped member (intermediate member) 48 does not rotate simply by contacting the rear end 321 of the towing rod.

[0024] The tip end (the end facing rearward) of the S-shaped member (indirect member) 48 is connected to an elastic, expandable member (gas spring) 49, which is connected to the lower end of a swing plate 73 that activates the parking brake mechanism (hydraulic brake) 7. The S-shaped member (indirect member) 48 is located between the elastic, expandable member (gas spring) 49 and the rear end 321 of the towing rod, and moves the elastic, expandable member (gas spring) 49 in conjunction with the movement of the towing rod 32.

[0025] The advantage of using the joint member 48 is that by devising the structure, shape, and mounting position of the joint member 48, as well as the structure of the contact portion with the towing rod rear end 321, it is possible to freely design the timing and degree to which the inertia brake mechanism 4 operates, as well as the connection with the hydraulic brake 7. It goes without saying that the joint member 48 is not limited to an S-shaped member. For example, if the position of the hydraulic brake 7 changes, the shape of the joint member 48 can also change accordingly. In addition, there is a modified embodiment in which the elastic expansion and contraction member (gas spring) 49 is directly connected to the rear end 321 of the pulling rod without using the S-shaped member (intermediate member) 48.

[0026] (Parking brake mechanism (hydraulic brake)) As described above, while the tractor is traveling, the parking brake mechanism (hydraulic brake) 7, which functions as a part of the inertia brake mechanism 4, does not operate unless the tractor decelerates. In the embodiment, a parking brake mechanism (hydraulic brake) 7 is used as the inertia brake mechanism 4, which contributes to reducing the number of components.

[0027] [2 Inertia braking during braking] (Towing rod operation) 4 is an explanatory diagram of the inertia brake during braking. When the tractor applies the brakes, the trailer 2, which maintains its speed before braking, moves relatively toward the tractor, causing the hitch portion 34 (towing rod 32) to move rearward. The towing rod 32 is guided by the guide tube 311 , and the rear end 321 of the towing rod projects from the rear of the towing frame end member 31 .

[0028] (Operation of elastic expansion member (gas spring) and parking brake mechanism (hydraulic brake)) When the tractor brakes, the bent portion 481 of the S-shaped member (intermediate member) 48 is pushed by the rear end 321 of the towing rod, causing the S-shaped member (intermediate member) 48 to rotate about the S-shaped member shaft 482. This movement is transmitted to the elastic expansion / contraction member (gas spring) 49, which pushes the elastic expansion / contraction member (gas spring) connection shaft 732 at the lower end of the swing plate 73 rearward. The elastic expansion / contraction member (gas spring) 49 contracts, softening the sudden impact caused by the speed difference between the tractor and trailer 2 and transmitting the movement of the towing rod 32 to the swing plate 73.

[0029] The rocking plate 73 rotates around a rocking plate rotation shaft 733. Between the rocking plate rotation shaft 733 and the elastic expansion / contraction member (gas spring) connection shaft 732, there is a hydraulic piston rod connection shaft 7411. The movement of the elastic expansion / contraction member (gas spring) 49 that has absorbed the impact contracts the hydraulic piston rod 741, and hydraulic pressure is transmitted from the brake operating cylinder 74 through the hydraulic piping 75 to the braking unit attached to the wheel 22. The braking unit receives the hydraulic pressure and applies the brakes to the wheel 22. The braking device continues to operate until the speed of the trailer 2 becomes the same as that of the tractor.

[0030] To summarize the inertia brake mechanism 4 of the embodiment, when the tractor applies the brakes, the towing rod 32 moves rearward while receiving resistance from the reaction force of the elastically expandable member (gas spring) 49, thereby absorbing the shock caused by the braking of the tractor. The elastically expandable member (gas spring) 49 is attached directly or indirectly to the towing rod 32. In the embodiment, the elastically expandable member (gas spring) 49 is attached indirectly via an S-shaped member 48 (intermediate member). The S-shaped member (intermediate member) 48 swings freely around its base end as an axis, and a bent portion 481 of the S-shaped member (intermediate member) 48 protrudes forward. The elastically expandable member (gas spring) 49 connects the towing rod 32 and the hydraulic brake 7. The bent portion 481 is pressed by the rear end 321 of the towing rod, moving the rearward end of the S-shaped member (intermediate member) 48, which causes the elastically expandable member (gas spring) 49 to contract and absorb the shock. The hydraulic brake 7 operates without lag time due to the movement of the elastic expansion / contraction member (gas spring) connecting shaft 732 that absorbs the impact, and generates a substantially constant braking force.

[0031] As explained above, the hydraulic brake 7 of the embodiment operates in conjunction with mechanical components, making it highly reliable and less prone to malfunction. The greater the speed difference caused by braking the tractor, the stronger the pressure on the towing rod 32, causing the elastic expansion / contraction member (gas spring) 49 to move more, absorbing the impact transmitted to the towing rod 32. The movement of the towing rod 32 absorbed by the elastic expansion / contraction member (gas spring) 49 is transmitted directly to the hydraulic brake 7, applying substantially constant braking without lag time. It is preferable that the hydraulic brake 7 is provided separately from the parking brake. By adopting the hydraulic brake 7 as a hydraulic brake 7 dedicated to the inertia brake, the performance and settings of the hydraulic brake can be made suitable for the inertia brake.

[0032] (Almost constant braking force) When the speed difference between the tractor and trailer 2 is large, the towing rod 32 moves greatly, and the elastic expansion / contraction member (gas spring) 49 contracts greatly by the amount of that movement. On the other hand, when the speed difference between the tractor and trailer 2 is small, the towing rod 32 moves a small amount, and the elastic expansion / contraction member (gas spring) 49 contracts a small amount by the amount of that movement. Ultimately, whether the towing rod 32 moves a large amount or a small amount, the movement is absorbed by the elastic expansion and contraction member (gas spring) 49, and the movement of the hydraulic piston rod 741 transmitted via the swing plate 73 remains almost unchanged. Therefore, the braking force of the hydraulic brake 7 is approximately constant regardless of the speed difference between the tractor and the trailer 2.

[0033] (Parking brake lever operation) The inertia brake mechanism 4 of the embodiment is designed not to affect the parking brake lever 72 because it utilizes the parking brake mechanism (hydraulic brake) 7. As described above, the rocking plate 73 that activates the inertia brake mechanism 4 rotates around the rocking plate rotation shaft 733, and is connected at its lower end to the elastic expansion / contraction member (gas spring) 49 via the elastic expansion / contraction member (gas spring) connection shaft 732 that activates the inertia brake mechanism 4. The parking brake mechanism (hydraulic brake) is connected to the parking brake lever 72 via the slide plate connection shaft 731 that rotatably connects the slide plate 723 to the upper end of the rocking plate rotation shaft 733.

[0034] The slide plate 723 is provided with an elongated hole 7231, and the parking brake lever 72 is connected via the elongated hole 7231. The parking brake lever 72 of the embodiment moves the slide plate 723 via a connecting pin 7232. The embodiment is configured so that when the inertia brake mechanism 4 is functioning, the connecting pin 7232 moves within the elongated hole 7231, preventing the parking brake lever 72 from moving. Even if the swing plate 73 moves due to the action of the inertia brake mechanism 4 and the slide plate 723 of the parking brake mechanism (hydraulic brake) 7 moves, the parking brake lever 72 does not move.

[0035] [3 When using the parking brake] FIG. 5 is an explanatory diagram of the parking brake. When the trailer 2 is stopped and separated from the tractor, the parking brake mechanism (hydraulic brake) 7 is used. Naturally, at this time, the inertia brake mechanism 4 and the towing rod 32 do not operate at all. By lifting the parking brake lever 72 in the direction of the arrow, the parking brake lever 72 rotates around the lever connecting plate rotation shaft 722. With this movement, the connecting pin 7232 at the lower end of the lever connecting plate 721 hits the front end of the elongated hole 7231 in the slide plate 723, moving the slide plate 723 forward. As the slide plate 723 moves, the swing plate 73 rotates around the swing plate rotation shaft 733. The rotation of the swing plate 73 pushes the hydraulic piston rod 741 toward the brake operating cylinder 74, which travels through the hydraulic piping 75 and activates the braking units provided on the wheels 22.

[0036] [4 Inertia brake stop device] There may be times when you want to back up the trailer 2 using the tractor. When this happens, as the tractor backs up, the hitch portion 34 is pushed rearward, and the towing rod 32 is pushed in, activating the inertia brake mechanism 4 and preventing the trailer 2 from moving. Therefore, this embodiment is equipped with an inertia brake stopping device 8. Figure 6 is an explanatory diagram of the inertia brake stopping device 8, and Figure 6(A) shows the state before the inertia brake stopping device 8 is activated. At this time, the interrupting piece 81 is located above the gap 39 that has formed between the towing rod return device mounting ring 43 and the guide tube tip 3111. Figure 6(B) shows the state after the inertia brake stopping device 8 has been activated. The operator can insert the interrupting piece 81 into the gap 39 by operating the operating lever 82. This prevents the towing rod 32 from moving even when the tractor is reversing.

[0037] [Variations] The inertial brake mechanism 4 described above is indirectly connected to the towing rod 32 by providing an S-shaped member (intermediate member) 48 between the towing rod rear end 321 and an elastic expandable member (gas spring) 49. In the embodiment, the S-shaped member (intermediate member) 48 or the like is used as the interlocking mechanism between the towing rod 32 and the hydraulic brake 7, but the structure of the interlocking mechanism may be appropriate and is not limited to the interlocking mechanism of the embodiment. Furthermore, a modified embodiment includes a mode in which the S-shaped member (intermediate member) 48 is eliminated and the elastic expandable member (gas spring) 49 is directly attached to the towing rod rear end 321.

[0038] (summary) As described above, the inertia brake mechanism 4 using the elastic expansion / contraction member (gas spring) 49 contributes to eliminating the lag time during braking that is common with conventional brake mechanisms. In addition, the elastic expansion / contraction member (gas spring) 49 of the embodiment immediately absorbs the force that moves the tow rod 32 rearward, eliminating the need for adjustment of the operation timing of the inertia brake mechanism 4 that was required with conventional inertia brake mechanisms 4. The embodiment is easy to use for the user.

[0039] (Contribution to SDGs) The present invention improves the usability of the inertia brake mechanism 4, eliminating the lag time that occurs in conventional brake mechanisms and eliminating the need for unnecessary braking operations. This improves the fuel efficiency of the tractor. The present invention can contribute to the SDGs goal 12, responsible consumption and production.

[0040] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes design changes and the like within the scope of the present invention that do not deviate from the gist of the present invention.

[0041] Furthermore, the above-described embodiments and modifications can be combined by utilizing the techniques of each other, as long as there are no particular contradictions or problems in the purpose, configuration, etc. [Explanation of symbols]

[0042] 2 Trailer 21 Cargo bed 22 wheels 23 Parking Stand 3 Towing frame 31 Towing frame end member 311 Guide tube 3111 Guide tube tip 32 Traction rod 321 Traction rod rear end 33 Sliding ring stopper 34 Hitch section 39 Gap 4. Inertia brake mechanism 42 Traction rod return device 43 Towing rod return device mounting ring 431 Mounting piece 44 Piston rod 45 Guide piece 451 Guide groove 46 cylinders 47 Mounting plate material 48 S-shaped member (indirect member) 481 Bend 482 S-shaped member shaft 49 Elastic expansion and contraction member (gas spring) 7 Parking brake mechanism (hydraulic brake) 72 Parking brake lever 721 Lever connecting plate 722 Lever connecting plate pivot shaft 723 Slide Plate 7231 Long hole 7232 Connecting pin 73 Swing Plate 731 Slide plate connecting shaft 732 Elastic expansion member (gas spring) connecting shaft 733 Swing plate pivot shaft 74 Brake operating cylinder 741 Hydraulic Piston Rod 7411 Hydraulic piston rod connecting shaft 75 Hydraulic piping 8 Inertia brake stop device 81 Interrupt piece 82 Operating lever R right L Left F front B after

Claims

1. The trailer has a towing rod that connects the trailer and the tractor, an elastic expansion member, and a hydraulic brake. When the traction rod is moving forward, and the tractor brakes, the traction rod moves backward while receiving resistance from the reaction force of the elastic and expandable member, thereby absorbing the shock caused by the braking of the tractor, the elastic member is attached directly or indirectly to the towing rod and connects the towing rod and the hydraulic brake; A trailer characterized in that the hydraulic brake generates a braking force by movement of the towing rod.

2. 2. The trailer according to claim 1, wherein the braking force is substantially constant regardless of the movement of the towing rod.

3. 2. The trailer according to claim 1, wherein the elastic member is a gas spring.

4. Furthermore, there are indirect components, 2. The trailer according to claim 1, wherein the indirect member moves the elastically expandable member in conjunction with the movement of the towing rod, and the movement of the elastically expandable member activates the hydraulic brake.

5. 5. The trailer according to claim 4, wherein the towing rod is configured to allow rotation but not to transmit the rotation to the indirect member.

6. 6. The trailer according to claim 1, wherein the trailer is for agricultural use.

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