Traction arm rapid locking device and paver with traction arm rapid locking device

Abstract

The utility model provides a traction arm quick locking device and a paver with the traction arm quick locking device. The traction arm quick locking device comprises a lever, a pull rod and a bearing hook, the lever is hinged with a rear vertical plate of a rack of the paver, the rear end of the lever is an operation end, and the front end of the lever is a driving end; the pull rod is hinged with the driving end of the lever; the bearing hook is hinged with a rear vertical plate of a rack of the paver; the rear end of the bearing hook is hinged to the second end of the pull rod, and a hook body part is arranged at the front end of the bearing hook and used for hooking a traction arm of the paver so as to lock and position an ironing plate of the paver; a limiting clamping groove is formed in a rear vertical plate of a rack of the paver, the lever is arranged in the limiting clamping groove in a penetrating mode, and the lever is used for being matched with the limiting clamping groove under the action of external force and driving the bearing hook to rotate through the pull rod so as to hook or loosen a traction arm of the paver to lock, position or unlock an ironing plate. The problem that a lifting oil cylinder is damaged or even fails due to the fact that traction arms on the two sides of the paver cannot be locked in time is solved.

Description

Technical Field

[0001] The utility model relates to the field of construction machinery, and in particular, to a quick locking device for a traction arm and a paver having the same. Background Art

[0002] A paver is mainly used for paving asphalt or concrete pavements and is an important indispensable device in road construction. The screed of a paver is an important part in the pavement construction of the paver. The screed needs to be frequently transferred during the pavement construction of the paver to meet different engineering requirements or for the transfer of the construction site.

[0003] During the transfer, the lifting cylinder of the paver will lift the entire screed through the traction arm. At this time, the cylinder is in a suspended state, and the operator needs to lock the traction arms on both sides of the screed. If the traction arms are not locked in a timely and effective manner, the lifting cylinders on the traction arms on both sides of the paver will be in a long-term pressure-retaining state, and it is easy to cause damage to components such as the cylinder seals, directly resulting in leakage or sinking of the lifting cylinders. In severe cases, the lifting cylinders will directly fail, affecting the overall performance of the paver. Summary of the Utility Model

[0004] The main purpose of the present utility model is to provide a quick locking device for a traction arm and a paver having the same, so as to at least solve the problem of damage or even failure of the lifting cylinders caused by the inability to lock the traction arms on both sides of the paver in the prior art in a timely manner.

[0005] To achieve the above object, according to one aspect of the present utility model, a quick locking device for a traction arm is provided, including: a lever, the middle of the lever is hinged to the rear side wall of the rear vertical plate of the paver's frame through a hinge shaft, the rear end of the lever is an operating end, and the front end of the lever is a driving end; a pull rod, the first end of the pull rod is hinged to the driving end of the lever through a bolt; a load-bearing hook, the load-bearing hook is hinged to the rear side wall of the rear vertical plate of the paver's frame through a hinge shaft; the rear end of the load-bearing hook is hinged to the second end of the pull rod through a bolt, and the front end of the load-bearing hook has a hook body portion, and the hook body portion is used for hooking the traction arm of the paver to lock and position the screed of the paver; wherein, a limit card slot is opened on the rear vertical plate of the paver's frame, the lever is inserted into the limit card slot, and the lever is used to cooperate with the limit card slot under the action of an external force and drive the load-bearing hook to rotate through the pull rod to hook or release the traction arm of the paver to lock and position or unlock the screed.

[0006] Further, the lever is an "L"-shaped rod-like structure, and the long part of the lever is hinged to the rear side wall of the rear vertical plate of the paver's frame through a hinge shaft; the operating end is located at the end of the short part of the lever, and the driving end is located at the end of the long side of the lever.

[0007] Further, a handle ball is provided at the operating end of the lever.

[0008] Further, the pull rod is a rod-shaped structure with an obtuse bend.

[0009] Further, the load-bearing hook is an "L" shaped structure. The bent part of the load-bearing hook is hinged to the rear side wall of the rear vertical plate of the frame of the paver through a hinge shaft; the end of the short part of the load-bearing hook is hinged to the second end of the pull rod through a bolt, and the hook body part is located at the end of the long part of the load-bearing hook.

[0010] Further, the traction arm quick locking device further includes: a limit plate having a card slot, and the card slot abuts against the long part of the load-bearing hook to limit the load-bearing hook; a boosting spring, one end of the boosting spring is connected to the second end of the pull rod, and the other end of the boosting spring is connected to the limit plate.

[0011] The second aspect of the present utility model provides a paver, including: two of the traction arm quick locking devices, respectively arranged at two positions on the two sides of the rear vertical plate of the frame of the paver along the transverse direction; lifting cylinders, there are two lifting cylinders and they are respectively arranged on both sides of the paver; traction arms, there are two groups of traction arms, and the two groups of traction arms are respectively arranged on both sides of the main frame of the paver along the transverse direction and are connected to the two lifting cylinders; a screed, arranged at the front ends of the two groups of traction arms; wherein, the two traction arm quick locking devices are used to hook or release the two groups of traction arms to lock and position or unlock the screed.

[0012] The quick locking device for the traction arm of the technical solution of the present invention includes: a lever, the middle of the lever is hinged to the rear side wall of the rear vertical plate of the frame of the paver through a hinge shaft, the rear end of the lever is the operation end, and the front end of the lever is the driving end; a pull rod, the first end of the pull rod is hinged to the driving end of the lever through a bolt; a load-bearing hook, the load-bearing hook is hinged to the rear side wall of the rear vertical plate of the frame of the paver through a hinge shaft; the rear end of the load-bearing hook is hinged to the second end of the pull rod through a bolt, and the front end of the load-bearing hook has a hook body part, and the hook body part is used to hook the traction arm of the paver to lock and position the screed of the paver; wherein, a limit card slot is opened on the rear vertical plate of the frame of the paver, the lever is arranged in the limit card slot, and the lever is used to cooperate with the limit card slot under the action of an external force and drive the load-bearing hook to rotate through the pull rod to hook or release the traction arm of the paver to lock and position or unlock the screed. The operator holds the operation end of the lever 11 by hand, thereby driving the load-bearing hook 13 to swing through the pull rod 12. When the operation end is lifted upward, it drives the load-bearing hook 13 to swing towards the traction arm 30 of the paver and hook the traction arm 30 to lock and position the screed 40; when the operation end is pressed downward, it drives the load-bearing hook 13 to swing in a direction away from the traction arm 30 to release the traction arm 30 to unlock the screed 40. Thereby, it is avoided that the lifting cylinder is in a long-term pressure-holding state, resulting in damage to the cylinder seal and causing leakage or sinking of the lifting cylinder, and the problem that the lifting cylinder is damaged or even fails due to the inability to lock the traction arms on both sides of the existing paver in time is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The attached drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0014] Figure 1 is a schematic structural diagram of a quick locking device for a traction arm according to an optional embodiment of the present utility model;

[0015] Figure 2 is a position diagram of a quick locking device for a traction arm according to an optional embodiment of the present utility model;

[0016] Figure 3 is a schematic structural diagram of a paver according to an optional embodiment of the present utility model;

[0017] Among them, the above-mentioned attached drawings include the following reference numerals:

[0018] 10. Quick locking device for traction arm; 11. Lever; 12. Pull rod; 13. Load-bearing hook; 14. Limit card slot; 15. Handle ball; 16. Limit plate; 17. Boosting spring; 20. Lifting cylinder; 30. Traction arm; 40. Screed. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0020] The quick locking device 10 for the traction arm of the technical solution of the present utility model is as Figures 1 to 2 shown, and includes a lever 11, a pull rod 12, a load-bearing hook 13, a limit card slot 14 and a handle ball 15. The middle part of the lever 11 is hinged to the rear side wall of the rear vertical plate of the frame of the paver through a hinge shaft. The rear end of the lever 11 is the operating end, and the front end of the lever 11 is the driving end. The first end of the pull rod 12 is hinged to the driving end of the lever 11 through a bolt, which plays a role in connecting and transmitting force. The load-bearing hook 13 is hinged to the rear side wall of the rear vertical plate of the frame of the paver through a hinge shaft. The rear end of the load-bearing hook 13 is hinged to the second end of the pull rod 12 through a bolt. A limit card slot 14 is opened on the rear vertical plate of the frame of the paver. The lever 11 is arranged in the limit card slot 14. The limit card slot 14 is used to limit the movement range of the lever 11. The lever 11 is used to cooperate with the limit card slot 14 under the action of an external force and drive the load-bearing hook 13 to rotate through the pull rod 12 to hook or release the traction arm 30 of the paver so as to lock and position or unlock the screed 40. The operator holds the operating end of the lever 11 by hand and drives the load-bearing hook 13 to swing through the pull rod 12. When the operating end is lifted upward, it drives the load-bearing hook 13 to swing towards the traction arm 30 of the paver and hook the traction arm 30 to lock and position the screed 40. When the operating end is pressed downward, it drives the load-bearing hook 13 to swing in a direction away from the traction arm 30 to release the traction arm 30 to unlock the screed 40. Thereby, it is avoided that the lifting cylinder is in a long-term pressure-holding state, resulting in damage to the cylinder seal and causing leakage or sinking of the lifting cylinder. When the lever 11 moves to the locking or unlocking position, it is limited and locked by the limit card slot 14. The problem that the lifting cylinder is damaged or even fails due to the inability to lock the traction arms on both sides of the paver in the prior art is solved.

[0021] Further, the lever 11 is an "L"-shaped rod structure. The long part of the lever 11 is hinged to the rear side wall of the rear vertical plate of the frame of the paver through a hinge shaft. The operating end is located at the end of the short part of the lever 11, which is convenient for the operator to apply an external force. The driving end is located at the end of the long side of the lever 11, and the driving effect is achieved through connection with the pull rod 12. A handle ball 15 is provided at the operating end of the lever 11, which is used to provide a grasping point, facilitating the operation of the operator and improving the comfort of the operation.

[0022] Furthermore, the load-bearing hook 13 has an "L" shape. The bent part of the load-bearing hook 13 is hinged to the rear side wall of the rear vertical plate of the paver's frame through a hinge shaft; the end of the short part of the load-bearing hook 13 is hinged to the second end of the pull rod 12 through a bolt. The pull rod 12 has a rod body structure with an obtuse bend, ensuring that the driving force of the lever 11 can be better transmitted to the load-bearing hook 13, guaranteeing the stability and reliability of the movement of the load-bearing hook 13. The front end of the load-bearing hook 13 has a hook body part, which is located at the end of the long part of the load-bearing hook 13. The hook body part is used to hook the traction arm 30 of the paver to lock and position the screed 40 of the paver.

[0023] Furthermore, the quick locking device 10 for the traction arm further includes a limit plate 16 and an assisting spring 17. The limit plate 16 has a card slot. When the load-bearing hook 13 is in the unlocked state, the card slot abuts against the long part of the load-bearing hook 13 to limit the load-bearing hook 13, ensuring that the load-bearing hook 13 will not swing back and forth in the unlocked state and guaranteeing its stability. One end of the assisting spring 17 is connected to the second end of the pull rod 12, and the other end is connected to the limit plate 16. The assisting spring 17 provides an auxiliary force for the load-bearing hook 13. In the initial state when the paver has not started working, the pulling force of the assisting spring 17 drives the load-bearing hook 13 to swing towards the traction arm 30 of the paver and makes the hook body part at the lower end hook the traction arm 30 to lock and position the screed 40. At the same time, the pulling force of the assisting spring 17 can also ensure that the load-bearing hook 13 hooks the traction arm 30 tightly without falling off; in the state where unlocking is required, after the lifting cylinder lifts the traction arm 30, by pressing down the operating end of the lever 11 and overcoming the elastic force of the assisting spring 17, the hook body part of the load-bearing hook 13 is driven to withdraw backward and separate from the traction arm 30, and the lever 11 is inserted into the limit card slot 14 to achieve unlocking. The assisting spring 17 reduces the operation burden of the operator and improves the stability and reliability of the device.

[0024] During specific implementation, when the operator holds the handle ball 15 and presses it downwards once to separate the lever 11 from the limit card slot 14, the load-bearing hook 13 is driven by the acting force of the boosting spring 17 to automatically swing towards the traction arm 30 and drive the operating end of the lever 11 to swing upwards to the highest point. The hook body part of the load-bearing hook 13 hooks the traction arm 30 of the paver to achieve locking. When the paver needs to work, first operate the lifting oil cylinder to lift the traction arm 30, and then the operator holds the handle ball 15 and presses the operating end of the lever 11 downwards until the bottom end and locks it into the limit card slot 14. During this process, the short part of the lever 11 rotates around the hinge axis under the action of force, the operating end of the lever 11 drives the first end of the pull rod 12 to move, and the acting force is transmitted to the load-bearing hook 13 through the hinge axis by the second end of the pull rod 12. The load-bearing hook 13 swings backwards around its hinge axis under the traction of the pull rod 12 to separate from the traction arm 30, thereby realizing the unlocking process. During the operation process, the long part of the load-bearing hook 13 is restricted in the card slot of the limit plate 16 to ensure the stable position of the load-bearing hook 13.

[0025] The second aspect of the present utility model further provides a paver, as Figure 3 shown, including: two traction arm quick locking devices 10, respectively arranged on both sides of the rear vertical plate of the paver frame along the transverse direction, for quickly locking the traction arm 30; the traction arms 30 are in two groups, and the two groups of traction arms 30 are respectively arranged on both sides of the main frame of the paver along the transverse direction and are connected to two lifting oil cylinders 20; the lifting oil cylinders 20 are two and are respectively arranged on both sides of the paver, for lifting the traction arm 30; the screed 40 is arranged at the front ends of the two groups of traction arms 30 for paving operations; wherein, the two traction arm quick locking devices 10 are used to hook or release the two groups of traction arms 30 to lock and position or unlock the screed 40, so as to achieve the efficient operation of the paver.

[0026] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A traction arm quick locking device, characterized in that: include: A lever (11), wherein the middle portion of the lever (11) is hingedly connected to the rear side wall of the rear vertical plate of the frame of the paving machine through a hinge shaft, the rear end of the lever (11) is an operating end, and the front end of the lever (11) is a driving end; A pull rod (12), a first end of the pull rod (12) being hinged to the driving end of the lever (11) via a bolt; A load-bearing hook (13), the load-bearing hook (13) is hingedly connected to the rear side wall of the rear vertical plate of the frame of the paver through a hinge shaft; the rear end of the load-bearing hook (13) is hingedly connected to the second end of the pull rod (12) through a bolt, and the front end of the load-bearing hook (13) has a hook body, and the hook body is used to hook the traction arm of the paver to lock the screed of the paver in place; A limit slot (14) is provided on the rear vertical plate of the frame of the paver, and the lever (11) is inserted into the limit slot (14). The lever (11) is used to cooperate with the limit slot (14) under the action of external force and drive the load-bearing hook (13) to rotate through the pull rod (12) to hook or release the traction arm of the paver so as to lock or unlock the ironing plate.

2. The traction arm quick locking device according to claim 1, characterized in that: The lever (11) is an "L"-shaped rod structure, and the long part of the lever (11) is hinged to the rear side wall of the rear vertical plate of the frame of the paving machine through a hinge shaft; the operating end is located at the end of the short part of the lever (11), and the driving end is located at the end of the long side of the lever (11).

3. The traction arm quick locking device according to claim 2, characterized in that: The operating end of the lever (11) is provided with a handle ball (15).

4. The traction arm quick locking device according to claim 2, characterized in that: The pull rod (12) is a rod-shaped structure bent at an obtuse angle.

5. The traction arm quick locking device according to claim 4, characterized in that: The load-bearing hook (13) is an "L"-shaped structure, and the bent portion of the load-bearing hook (13) is hinged to the rear side wall of the rear vertical plate of the frame of the paver through a hinge shaft; the short end of the load-bearing hook (13) is hinged to the second end of the pull rod (12) through a bolt, and the hook body is located at the long end of the load-bearing hook (13).

6. The traction arm quick locking device according to claim 5, characterized in that: The traction arm quick locking device (10) further comprises: A limiting plate (16), the limiting plate (16) having a slot, the slot abutting against the long portion of the load-bearing hook (13) to limit the position of the load-bearing hook (13); A booster spring (17), one end of the booster spring (17) is connected to the second end of the pull rod (12), and the other end of the booster spring (17) is connected to the limit plate (16).

7. A paver, characterized in that: The traction arm quick locking device comprises the traction arm quick locking device according to any one of claims 1 to 6, wherein the traction arm quick locking device (10) is two, and the two traction arm quick locking devices (10) are respectively arranged at two sides of the rear vertical plate of the frame of the paving machine in the horizontal direction, and the paving machine further comprises: Lifting cylinders (20), two of which are respectively arranged on both sides of the paver; Traction arms (30), the traction arms (30) being in two groups, the two groups of traction arms (30) being respectively arranged on both sides of the main frame of the paving machine in the transverse direction and connected to the two lifting cylinders (20); An ironing plate (40) is arranged at the front ends of the two sets of traction arms (30); The two traction arm quick locking devices (10) are used to hook or release the two groups of traction arms (30) to lock or unlock the ironing plate (40).

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