Hanging device with lifting function

Abstract

The invention relates to the technical field of agricultural machinery, and discloses a hitching device with a lifting function, which consists of a rack, a left lifting oil cylinder, a left lifting arm, a left limiting rod, a right lifting oil cylinder, a right lifting arm, a right limiting rod, a guide rail frame, a lifting moving frame and a lifting oil cylinder, a rodless cavity of the left lifting oil cylinder and a rodless cavity of the right lifting oil cylinder are connected with rodless cavity oil ports of the lifting oil cylinders; a rod cavity of the left lifting oil cylinder and a rod cavity of the right lifting oil cylinder are connected with a rod cavity oil port of the lifting oil cylinder; the guide rail frame comprises a left guide rail, a right guide rail, a base and a top plate; the lifting moving frame is composed of a hanging frame and a sliding component. One end of a cylinder barrel is hinged to the lower part of the guide rail frame; the lifting moving frame vertically translates up and down along a guide rail of the guide rail frame. The device is simple and compact in structure, a hydraulic oil circuit is easy to control, the lifting adjusting function of the operation equipment on the vertical plane is achieved, and the three-dimensional operation adaptability of the operation equipment is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery technology, in particular to a hitch device with lifting function. BACKGROUND

[0002] The tractor or power chassis is usually connected with the working equipment through the front hitch device. However, the existing hitch device has single working state function, cannot realize the lifting function of the working equipment in the vertical plane, and cannot meet the requirements of three-dimensional work, such as pruning, picking, spraying and other work that need to adjust the working height to complete the work. SUMMARY

[0003] One of the purposes of the present application is to provide a hitch device with lifting function, which has compact structure, can realize the position switching of the working state and the transfer state of the working equipment, and realize the lifting function of the working equipment in the vertical plane, and meet the requirements of three-dimensional work.

[0004] Another purpose of the present application is to set the mechanical structure of the hitch device reasonably, so as to realize the sequential action of the lifting oil cylinder and the lifting oil cylinder by using only one hydraulic valve, and simplify the hydraulic control system of the hitch device.

[0005] In order to achieve the above purpose, the technical scheme provided by the present application is as follows: The present application provides a hitch device with lifting function, comprising: a rack; a guide rail frame which is spaced apart from the rack; a left lifting arm, one end of which is hinged to the left side of the rack, and the other end is hinged to the left side of the guide rail frame; a left lifting oil cylinder, one end of which is hinged to the left side of the rack, and the other end is hinged to the upper part of the left lifting arm; wherein the hinged point of the left lifting oil cylinder and the rack is located above the hinged point of the left lifting arm and the rack; a left limiting rod, one end of which is hinged to the lower part of the left lifting arm, and the other end is hinged to the left side of the guide rail frame; wherein the hinged point of the left limiting rod and the guide rail frame is located below the hinged point of the left lifting arm and the guide rail frame; a right lifting arm, one end of which is hinged to the right side of the rack, and the other end is hinged to the right side of the guide rail frame; the right lifting arm is symmetrically arranged with the left lifting arm; a right lifting oil cylinder, one end of which is hinged to the right side of the rack, and the other end is hinged to the upper part of the right lifting arm; the right lifting oil cylinder is symmetrically arranged with the left lifting oil cylinder; A right limiting rod, one end of which is hingedly connected to the lower part of the right lifting arm, and the other end of which is hingedly connected to the right side of the guide rail frame; the right limiting rod is symmetrically arranged with the left limiting rod; A lifting moving frame, which is connected to the guide rail frame and can slide up and down along the guide rail frame; the lifting moving frame is used for connecting work equipment; A lifting oil cylinder, one end of which is hingedly connected to the lower end of the guide rail frame, and the other end of which is hingedly connected to the lifting moving frame.

[0006] Preferably, the guide rail frame comprises: A base; A left guide rail, one end of which is vertically and fixedly connected to the left end of the base; A right guide rail, one end of which is vertically and fixedly connected to the right end of the base, and which is arranged in parallel with the left guide rail; A top plate, which is arranged above the base, and the other ends of the left guide rail and the right guide rail are fixedly connected to the two ends of the top plate, respectively.

[0007] Preferably, the guide rail frame further comprises: A left pin shaft seat, which is fixedly connected to the lower end of the left guide rail; A right pin shaft seat, which is fixedly connected to the lower end of the left guide rail, and which is symmetrically arranged with the left pin shaft seat; Wherein, the left lifting arm and the left limiting rod are hingedly connected to the left pin shaft seat through a pin shaft, respectively; the right lifting arm and the right limiting rod are hingedly connected to the right pin shaft seat through a pin shaft, respectively.

[0008] Preferably, the lifting moving frame comprises: A hanging frame, which is a frame structure, and has a plurality of work equipment connecting holes on the hanging frame; A plurality of sliding components, which are symmetrically arranged on the two sides of the hanging frame; the sliding components and the left guide rail and the right guide rail form a sliding pair, so that the lifting moving frame moves along the guide rail frame.

[0009] Preferably, the hanging device with lifting function further comprises: A hydraulic control system, which is provided with a hydraulic valve, and the hydraulic valve has two working oil ports; Wherein, the rodless cavity of the left lifting oil cylinder, the right lifting oil cylinder and the lifting oil cylinder is communicated with the same working oil port; the rod cavity of the left lifting oil cylinder, the right lifting oil cylinder and the lifting oil cylinder is communicated with the other working oil port.

[0010] Compared with the prior art, the technical effect of the present application is: The hanging device with the lifting function can realize position switching of a working state and a transfer state of work equipment, and lifting function of the work equipment in a vertical plane, and meets the requirement of three-dimensional work. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0012] Figure 1 The overall structure schematic diagram of the hanging device with the lifting function provided by the present application.

[0013] Figure 2 The working state side view of the hanging device with the lifting function provided by the present application.

[0014] Figure 3 The transfer state side view of the hanging device with the lifting function provided by the present application.

[0015] Figure 4 The structure schematic diagram of the guide rail frame provided by the present application.

[0016] Figure 5 The structure schematic diagram of the lifting moving frame provided by the present application.

[0017] Figure 6 The principle diagram of the hydraulic control system provided by the present application.

[0018] Explanation of reference signs: 0-frame; 101-left lifting oil cylinder; 102-right lifting oil cylinder; 201-left lifting arm; 202-right lifting arm; 301-left limiting rod; 302-right limiting rod; 4-guide rail frame; 401-base; 402-left guide rail; 403-top plate; 404-right guide rail; 405-right pin shaft seat; 406-left pin shaft seat; 407-second pin shaft mounting hole; 408-fourth pin shaft mounting hole; 409-third pin shaft mounting hole; 5-lifting moving frame; 501-hanging frame; 502-sliding part; 503-first pin shaft mounting hole; 6-lifting oil cylinder; 7-hydraulic valve; 801-first pin shaft; 802-second pin shaft; 803-third pin shaft; 804-fourth pin shaft; 805-fifth pin shaft; 806-sixth pin shaft; 807-seventh pin shaft; 808-eighth pin shaft. DETAILED DESCRIPTION

[0019] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the present application.

[0020] As shown in Figures 1-3 The present application provides a hanging device with lifting function, mainly comprising: a rack 0, a left lifting oil cylinder 101, a left lifting arm 201, a left limiting rod 301, a right lifting oil cylinder 102, a right lifting arm 202, a right limiting rod 302, a guide rail frame 4, a lifting moving frame 5 and a lifting oil cylinder 6.

[0021] The left lifting oil cylinder 101 is located above the left lifting arm 201, one end of the cylinder barrel of the left lifting oil cylinder 101 is hinged to the left upper part of the rack 0 through the seventh pin shaft 807, and one end of the piston rod of the left lifting oil cylinder 101 is hinged to the upper part of the left lifting arm 201. One end of the left lifting arm 201 is hinged to the left lower part of the rack 0, and the hinge point is lower than that of one end of the cylinder barrel of the left lifting oil cylinder 101; the other end of the left lifting arm 201 is hinged to the left side of the guide rail frame 4 through the third pin shaft 803. One end of the left limiting rod 301 is hinged to the lower part of the left lifting arm 201, and the other end is hinged to the left side of the guide rail frame 4 through the fourth pin shaft 804, and the hinge point is lower than that of the left lifting arm 201.

[0022] The right lifting oil cylinder 102 is located above the right lifting arm 202, one end of the cylinder barrel of the right lifting oil cylinder 102 is hinged to the right upper part of the rack 0, and one end of the piston rod is hinged to the upper part of the right lifting arm 202. One end of the right lifting arm 202 is hinged to the right lower part of the rack 0, and the hinge point is lower than that of one end of the cylinder barrel of the right lifting oil cylinder 102, and the other end of the right lifting arm 202 is hinged to the right side of the guide rail frame 4. One end of the right limiting rod 302 is hinged to the lower part of the right lifting arm 202, and the other end is hinged to the right side of the guide rail frame 4, and the hinge point is lower than that of the right lifting arm 202. Among them, the right lifting oil cylinder 102, the right lifting arm 202 and the right limiting rod 302 are symmetrically installed and arranged with the left lifting oil cylinder 101, the left lifting arm 201 and the left limiting rod 301 respectively; and the right lifting oil cylinder 102, the right lifting arm 202 and the right limiting rod 302 are installed in the same way as the left lifting oil cylinder 101, the left lifting arm 201 and the left limiting rod 301 respectively.

[0023] The lifting moving frame 5 and the guide rail frame 4 form a sliding pair. The piston rod of the lifting oil cylinder 6 is hingedly connected to the lifting moving frame 5 through a first pin shaft 801, and the cylinder barrel of the lifting oil cylinder 6 is hingedly connected to the lower part of the guide rail frame 4 through a second pin shaft 802. The lifting moving frame 5 can be driven to move up and down along the guide rail of the guide rail frame 4 through the lifting oil cylinder 6.

[0024] As shown in the figure, the guide rail frame 4 mainly includes a base 401, a left guide rail 402, a top plate 403, a right guide rail 404, a right pin shaft seat 405, and a left pin shaft seat 406. Figure 4

[0025] The base 401 is horizontally arranged; the lower end of the left guide rail 402 is vertically fixed to the upper side of the left end of the base 401; the lower end of the right guide rail 404 is vertically fixed to the upper side of the right end of the base 401; the two ends of the top plate 403 are respectively fixed to the upper ends of the left guide rail 402 and the right guide rail 404, and play a role of reinforcement. The right pin shaft seat 405 is fixedly arranged at the lower end of the right guide rail 404, and a pin shaft mounting hole is arranged on the right pin shaft seat 405; the left pin shaft seat 406 is fixed to the lower end of the left guide rail 402, and a third pin shaft mounting hole 409 for mounting a third pin shaft 803 and a fourth pin shaft mounting hole 408 for mounting a fourth pin shaft 804 are arranged on the upper end of the left pin shaft seat 406; a second pin shaft mounting hole 407 for mounting the second pin shaft 802 is arranged on the upper side of the middle position of the base 401.

[0026] In this embodiment, the base 401, the left guide rail 402, and the right guide rail 403 are all made of channel steel.

[0027] As shown in the figure, the lifting moving frame 5 includes a hanging frame 501 and a sliding component 502. Figure 5

[0028] The hanging frame 501 is a frame structure, and a first pin shaft mounting hole 503 for mounting the first pin shaft 801 is arranged at the middle position of the top of the hanging frame 501; a plurality of sliding components 502 are symmetrically fixedly arranged on the two sides of the hanging frame 501. The sliding component 502 is a cylindrical roller. The sliding components 502 fixed on the two sides of the hanging frame 501 and the left guide rail 402 and the right guide rail 404 form a sliding pair, so that the lifting moving frame 5 can move up and down along the guide rail frame 4. A plurality of operation equipment connecting holes are arranged on the hanging frame 501, so as to facilitate the connection of the operation equipment.

[0029] In this embodiment, the left limiting rod 301 and the right limiting rod 302 are telescopic rods with adjustable length, and the length of the left limiting rod 301 and the right limiting rod 302 can be changed. By changing the length of the left limiting rod 301 and the right limiting rod 302, the inclination angle of the hanging frame 501 can be changed, so as to change the operation inclination angle of the operation equipment (working state), so as to adapt to the operation requirements of different types of operation equipment. In the working process, the length of the left limiting rod 301 and the right limiting rod 302 remains unchanged.

[0030] As​​Figure 6 As shown, the hitching device provided by the present application further comprises a hydraulic control system, which is provided with a hydraulic valve 7 having two working oil ports. The oil ports of the rodless chambers of the left lifting oil cylinder 101, the right lifting oil cylinder 102 and the lifting oil cylinder 6 are respectively communicated with the same working oil port of the hydraulic valve 7 through oil lines; the oil ports of the rod chambers of the left lifting oil cylinder 101, the right lifting oil cylinder 102 and the lifting oil cylinder 6 are respectively communicated with the other working oil port of the hydraulic valve 7 through oil lines. In the embodiment, the hydraulic valve 7 is a three-position four-way valve.

[0031] The working process of the hitching device is as follows: (1) When the hitching device is switched from the transit state to the working state, the left lifting oil cylinder 101 and the right lifting oil cylinder 102 need to be first elongated to make the bottom position of the guide rail frame 4 turn down to the working position, and then the height of the movable lifting frame 5 (working equipment) is adjusted by elongating the lifting oil cylinder 6.

[0032] The oil ports of the rodless chambers of the left lifting oil cylinder 101, the right lifting oil cylinder 102 and the lifting oil cylinder 6 are connected to the hydraulic oil through the hydraulic valve 7; since the left lifting oil cylinder 102 and the right lifting oil cylinder 102 are respectively located above the left lifting arm 201 and the right lifting arm 202 and are subjected to the tensile force of the hitching device (except the left lifting oil cylinder 102 and the right lifting oil cylinder 102) and the working equipment, and the lifting oil cylinder 6 is subjected to the compression force of the working equipment, the left lifting oil cylinder 101 and the right lifting oil cylinder 102 are first elongated, and the lifting oil cylinder 6 can be elongated only after the left lifting oil cylinder 101 and the right lifting oil cylinder 102 are elongated to the limit. Thus, the sequential action requirement of switching the hitching device from the transit state to the working state is met.

[0033] (2) When the hitching device is switched from the flat operation state to the folded transit state, the movable lifting frame 5 (working equipment) is first lowered to the lowest point by shortening the lifting oil cylinder 6, and then the left lifting oil cylinder 101 and the right lifting oil cylinder 102 are shortened to make the bottom position of the guide rail frame 4 turn up to the transit position.

[0034] The oil ports of the rod chambers of the left lifting oil cylinder 101, the right lifting oil cylinder 102 and the lifting oil cylinder 6 are connected to the hydraulic oil through the hydraulic valve 7; since the left lifting oil cylinder 101 and the right lifting oil cylinder 102 are subjected to the tensile force of the hitching device (except the left lifting oil cylinder 102 and the right lifting oil cylinder 102) and the working equipment, and the lifting oil cylinder 6 is subjected to the compression force of the working equipment, the lifting oil cylinder 6 is first shortened, and the left lifting oil cylinder 101 and the right lifting oil cylinder 12 can be shortened only after the lifting oil cylinder 6 is shortened to the limit. Thus, the sequential action requirement of switching the hitching device from the flat operation state to the folded transit state is met.

[0035] (3) During the operation, the left lifting oil cylinder 101 and the right lifting oil cylinder 102 are always in the elongated state due to the tensile force of the hitching device (except the left lifting oil cylinder 102 and the right lifting oil cylinder 102) and the operation equipment, and the lifting oil cylinder 6 is subjected to the compression force of the operation equipment. The lifting and lowering adjustment function of the operation equipment in the vertical plane during the operation can be realized by the elongation and shortening of the lifting oil cylinder 6.

[0036] The hitching device with the lifting function provided by the present application can realize the position switching of the operation state and the scene transfer state of the operation equipment, and the lifting function of the operation equipment in the vertical plane, and meets the requirements of the three-dimensional operation; meanwhile, the hydraulic oil path control system is simple, and only one set of hydraulic valve can realize the sequential operation of the lifting oil cylinder and the lifting oil cylinder according to the operation requirements, which reduces the cost and greatly improves the adaptability of the operation device to the three-dimensional operation.

[0037] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application, for example, the sliding pair composed of the linear bearing and the cylindrical guide rail. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A hanging device with lifting function, characterized in that, Comprise: frame; rail frame, which is spaced apart from the frame; left lifting arm, one end of which is hinged to the left side of the frame, and the other end is hinged to the left side of the rail frame; left lifting oil cylinder, one end of which is hinged to the left side of the frame, and the other end is hinged to the upper part of the left lifting arm; wherein the hinged point of the left lifting oil cylinder and the frame is above the hinged point of the left lifting arm and the frame; left limiting rod, one end of which is hinged to the lower part of the left lifting arm, and the other end is hinged to the left side of the rail frame; wherein the hinged point of the left limiting rod and the rail frame is below the hinged point of the left lifting arm and the rail frame; right lifting arm, one end of which is hinged to the right side of the frame, and the other end is hinged to the right side of the rail frame; the right lifting arm is symmetrically arranged with the left lifting arm; right lifting oil cylinder, one end of which is hinged to the right side of the frame, and the other end is hinged to the upper part of the right lifting arm; the right lifting oil cylinder is symmetrically arranged with the left lifting oil cylinder; right limiting rod, one end of which is hinged to the lower part of the right lifting arm, and the other end is hinged to the right side of the rail frame; the right limiting rod is symmetrically arranged with the left limiting rod; Lifting moving frame, which is connected to the rail frame and can slide up and down along the rail frame; the lifting moving frame is used to connect the working equipment; Lifting oil cylinder, one end of which is hinged to the lower end of the rail frame, and the other end is hinged to the lifting moving frame.

2. The hitch device with lifting function according to claim 1, characterized in that, The rail frame comprises: base; left rail, one end of which is vertically fixedly connected to the left end of the base; right rail, one end of which is vertically fixedly connected to the right end of the base and is arranged in parallel with the left rail; top plate, which is arranged above the base, and the other ends of the left rail and the right rail are fixedly connected to the two ends of the top plate.

3. The hitch device with lifting function according to claim 2, characterized in that The rail frame further comprises: left pin shaft seat, which is fixedly connected to the lower end of the left rail; right pin shaft seat, which is fixedly connected to the lower end of the left rail and is symmetrically arranged with the left pin shaft seat; wherein the left lifting arm and the left limiting rod are respectively hinged to the left pin shaft seat through a pin shaft; the right lifting arm and the right limiting rod are respectively hinged to the right pin shaft seat through a pin shaft.

4. The hitch device with lifting function according to claim 2 or 3, characterized in that The lifting moving frame comprises: hanging frame, which is a frame structure and has a plurality of working equipment connection holes on the hanging frame; a plurality of sliding components, which are symmetrically installed on both sides of the hanging frame; the sliding components and the left rail and the right rail form a sliding pair, so that the lifting moving frame moves along the rail frame.

5. The hitch device with lifting function according to claim 4, characterized in that Further comprising: hydraulic control system, which is provided with a hydraulic valve having two working oil ports; wherein the rodless cavity of the left lifting oil cylinder, the right lifting oil cylinder and the lifting oil cylinder is communicated with the same working oil port; the rod cavity of the left lifting oil cylinder, the right lifting oil cylinder and the lifting oil cylinder is communicated with the other working oil port.

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