Small-turning hinged support carrier

Abstract

The invention discloses a small-turning hinged support carrier, and relates to the technical field of carriers, the small-turning hinged support carrier comprises a front frame and a rear frame, the rear end of the front frame is hinged to the front end of the rear frame, the left side of the rear frame is provided with a left swing beam, the left swing beam is provided with a left front wheel and a left rear wheel, the right side of the rear frame is provided with a right swing beam, and the right swing beam is provided with a left rear wheel and a right rear wheel. A front right wheel and a rear right wheel are arranged on the right swing beam, a left steering oil cylinder and a right steering oil cylinder are further hinged between the rear end of the front frame and the front end of the rear frame, a left oil cylinder set is arranged between the left swing beam and the left side of the rear frame and used for adjusting the front-back inclination angle of the left swing beam, and a right oil cylinder set is arranged between the right swing beam and the left side of the rear frame and used for adjusting the front-back inclination angle of the right swing beam. A right oil cylinder set is arranged between the right swing beam and the right side of the rear frame and used for adjusting the front-back inclination angle of the right swing beam. According to the invention, the turning radius can be further reduced, so that the small-turning articulated bracket carrier can pass through a roadway with a smaller turning radius.

Description

Technical Field

[0001] The invention relates to the technical field of transport vehicles, in particular to a small-turn articulated bracket transport vehicle. Background Art

[0002] The articulated support carrier is an important equipment for long-distance and fast transportation of hydraulic supports in coal mines. The existing articulated support carrier adopts an articulated structure of front and rear frames, and the front and rear frames are driven to bend and turn by the steering cylinder set at the hinge. The front frame is single-axis bearing, and swing beams are set on the left and right sides of the rear frame. Two tires are installed on each swing beam. Through the free swing of the swing beam, the two tires installed on the swing beam can reliably touch the ground and bear the same wheel load, which is conducive to enhancing the adaptability to rugged roads. When the swing beam swings freely, the intersection of the swing axis of the swing beam of the rear frame and the load-bearing axis of the front frame is the theoretical steering center of the support carrier.

[0003] The existing support transporter has a large outer turning radius, so it is necessary to develop a corner tunnel that meets the large turning size requirements. However, the engineering cost of developing a large-sized corner tunnel is high. In addition, the large-sized corner tunnel has a large roof clearance, which increases the risk of roof collapse.

[0004] Therefore, there is an urgent need in the art for a small-turn articulated support transporter to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a small-turn articulated support transport vehicle to solve the problems existing in the above-mentioned prior art and to be able to pass through a corner lane with a small turning radius.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention discloses a small-turn articulated support transport vehicle, comprising a front frame and a rear frame, the rear end of the front frame and the front end of the rear frame are hinged, a left swing beam is provided on the left side of the rear frame, a left front wheel and a left rear wheel are provided on the left swing beam, a right swing beam is provided on the right side of the rear frame, a right front wheel and a right rear wheel are provided on the right swing beam, a left steering cylinder and a right steering cylinder are further hinged between the rear end of the front frame and the front end of the rear frame, a left cylinder group is provided between the left swing beam and the left side of the rear frame, the left cylinder group is used for adjusting the front and rear tilt angle of the left swing beam, a right cylinder group is provided between the right swing beam and the right side of the rear frame, the right cylinder group is used for adjusting the front and rear tilt angle of the right swing beam.

[0008] Preferably, the left cylinder group includes a left front cylinder and a left rear cylinder, the two ends of the left front cylinder are respectively hinged to the front end of the left swing beam and the rear frame, and the two ends of the left rear cylinder are respectively hinged to the rear end of the left swing beam and the rear frame;

[0009] The right side cylinder group includes a right front cylinder and a right rear cylinder, the two ends of the right front cylinder are respectively hinged to the front end of the right swing beam and the rear frame, and the two ends of the right rear cylinder are respectively hinged to the rear end of the right swing beam and the rear frame.

[0010] Preferably, it also includes a swing beam control pipeline, which is used to control the extension and retraction of the left front cylinder, the left rear cylinder, the right front cylinder and the right rear cylinder.

[0011] Preferably, the swing beam control pipeline includes a first swing beam inlet and outlet oil circuit, a second swing beam inlet and outlet oil circuit, a first swing beam control oil circuit, a second swing beam control oil circuit, a third swing beam control oil circuit, a fourth swing beam control oil circuit and a two-position four-way reversing valve;

[0012] The rodless chamber of the left front cylinder and the rod chamber of the left rear cylinder are both connected to the first swing beam inlet and outlet oil circuit, and the oil inlet end of the first swing beam inlet and outlet oil circuit is the first oil inlet port; the oil inlet end of the first swing beam control oil circuit is connected to the rod chamber of the left front cylinder, and the oil outlet end of the first swing beam control oil circuit is connected to the first interface of the two-position four-way reversing valve; the rodless chamber of the left rear cylinder and the rod chamber of the left front cylinder are both connected to the second swing beam inlet and outlet oil circuit, and the oil inlet end of the second swing beam inlet and outlet oil circuit is the second oil inlet port; the oil inlet end of the second swing beam control oil circuit is connected to the rod chamber of the left rear cylinder, and the oil outlet end of the second swing beam control oil circuit is connected to the second interface of the two-position four-way reversing valve;

[0013] The oil inlet end of the third swing beam control oil circuit is connected to the third interface of the two-position four-way reversing valve, and the oil outlet end of the third swing beam control oil circuit is respectively connected to the rod chamber of the right front cylinder and the rodless chamber of the right rear cylinder; the oil inlet end of the fourth swing beam control oil circuit is connected to the fourth interface of the two-position four-way reversing valve, and the oil outlet end of the fourth swing beam control oil circuit is respectively connected to the rod chamber of the right rear cylinder and the rodless chamber of the right front cylinder.

[0014] Preferably, the first oil inlet and the second oil inlet are respectively connected to two interfaces of an oil source reversing valve, and the oil inlet of the oil source reversing valve is connected to an oil inlet main pipe.

[0015] Preferably, a pressure regulating valve is provided on the oil inlet main pipe; or, a regulating valve is respectively provided on the first swing beam oil inlet and outlet circuit and the second swing beam oil inlet and outlet circuit.

[0016] Preferably, it also includes a steering control oil circuit, and the steering control oil circuit is used to control the extension and retraction of the left steering cylinder and the right steering cylinder.

[0017] Preferably, the steering control oil circuit includes an oil inlet pipeline, an oil return pipeline, a first steering control oil circuit, a second steering control oil circuit and a reversing device, one end of the oil inlet pipeline is connected to the P port of the reversing device, one end of the oil return pipeline is connected to the T port of the reversing device, one end of the first steering control oil circuit is connected to the L port of the reversing device, the other end of the first steering control oil circuit is connected to the rod chamber of the left steering cylinder, one end of the second steering control oil circuit is connected to the R port of the reversing device, and the other end of the second steering control oil circuit is connected to the rod chamber of the right steering cylinder;

[0018] The rod chamber of the left steering cylinder is communicated with the rodless chamber of the right steering cylinder, and the rodless chamber of the left steering cylinder is communicated with the rod chamber of the right steering cylinder.

[0019] Preferably, the rear end of the front frame is hinged with a front articulated seat, the front end of the rear frame is fixed with a fixed mounting tube, a rotating shaft is rotatably connected inside the fixed mounting tube, and one end of the rotating shaft away from the fixed mounting tube is fixedly connected to the front articulated seat.

[0020] Preferably, a swing beam center hole is provided at the center of the left swing beam and the right swing beam, a frame center hole is provided on both sides of the rear frame, and the left swing beam and the right swing beam are hinged to the rear frame through a swing pin.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] When the angle between the front frame and the rear frame reaches the limit value and the vehicle still cannot reach the expected turning radius, the present invention changes the load of each wheel of the rear frame to force the steering center of the whole vehicle to move toward the direction close to the vehicle turning, thereby achieving the purpose of reducing the turning radius. At the same time, since the wheel load transfer amount and the increase or decrease amount of the transfer distance of the wheels on both sides remain consistent, the position of the intersection point of the connecting line of the swing beam load fitting points remains unchanged, and thus the overall center of gravity position of the rear frame will not be changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1It is a structural schematic diagram of a small-turn articulated support transporter according to an embodiment of the present invention;

[0025] Figure 2 A top view of the small-turn articulated support transporter according to an embodiment of the present invention when turning;

[0026] Figure 3 It is a left view of the rear frame of the small-turn articulated support transporter according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the swing beam control pipeline in the small-turn articulated support transporter according to an embodiment of the present invention when turning;

[0028] Figure 5 This is a schematic diagram of a swing beam control pipeline in a small-turn articulated support transporter according to an embodiment of the present invention controlling the synchronous lifting of the left front wheel and the right front wheel or the left rear wheel and the right rear wheel;

[0029] Figure 6 It is a structural schematic diagram of a steering control oil circuit in a small-turn articulated support transporter according to an embodiment of the present invention;

[0030] Figure 7 A diagram showing the connection relationship between the front frame and the rear frame in a small-turn articulated support transporter according to an embodiment of the present invention;

[0031] In the figure: 1-front frame; 2-rear frame; 3-left steering cylinder; 4-right steering cylinder; 5-left swing beam; 6-right swing beam; 7-left front wheel; 8-left rear wheel; 9-right front wheel; 10-right rear wheel; 11-left front cylinder; 12-left rear cylinder; 13-right front cylinder; 14-right rear cylinder; 15-two-position four-way reversing valve; 16-first swing beam control oil circuit; 17-second swing beam control oil circuit; 18-third swing beam control oil circuit; 19-fourth swing beam control oil circuit; 20-reversing device; 21-oil inlet pipeline; 22-first steering control oil circuit; 23-second steering control oil circuit; 24-return oil pipeline; 25-first swing beam inlet and outlet oil circuit; 26-second swing beam inlet and outlet oil circuit; 27-front articulated seat; 28-fixed mounting cylinder; 29-articulation pin; 30-rotating shaft. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The object of the present invention is to provide a small-turn articulated support transport vehicle to solve the problems existing in the above-mentioned prior art and to be able to pass through a corner lane with a small turning radius.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-Figure 7 As shown, this embodiment provides a small-turn articulated support transport vehicle, including a front frame 1 and a rear frame 2. Figure 1 As shown, the rear end of the front frame 1 and the front end of the rear frame 2 are hinged, and the front wheels coaxially arranged are respectively arranged on both sides of the front frame 1, and the rear frame 2 is used to carry goods. The left side of the rear frame 2 is hinged with a left swing beam 5, which can swing around its center, and the left front wheel 7 and the left rear wheel 8 are arranged on the left swing beam 5, and the left front wheel 7 is located in front of the left rear wheel 8. Symmetrically arranged, the right side of the rear frame 2 is hinged with a right swing beam 6, which can also swing around its center, and the right front wheel 9 and the right rear wheel 10 are arranged on the right swing beam 6, and the right front wheel 9 is located in front of the right rear wheel 10. The left steering cylinder 3 and the right steering cylinder 4 are also hinged between the rear end of the front frame 1 and the front end of the rear frame 2. The left steering cylinder 3 and the right steering cylinder 4 are symmetrically arranged on the left and right sides between the front frame 1 and the rear frame 2, and the two ends of the left steering cylinder 3 and the right steering cylinder 4 are respectively hinged with the rear end of the front frame 1 and the front end of the rear frame 2. A left cylinder group is provided between the left swing beam 5 and the left side of the rear frame 2, and the left cylinder group is used to adjust the front and rear tilt angle of the left swing beam 5, so as to further adjust the height of the left front wheel 7 and the left rear wheel 8; similarly, a right cylinder group is provided between the right swing beam 6 and the right side of the rear frame 2, and the right cylinder group is used to adjust the front and rear tilt angle of the right swing beam 6, so as to adjust the relative height of the right front wheel 9 and the right rear wheel 10.

[0036] In actual use, when facing some corner lanes with a larger turning radius, it is only necessary to control the extension and retraction of the left steering cylinder 3 and the right steering cylinder 4 to pass through. Specifically, if you need to turn right, you can control the left steering cylinder 3 to extend while the right steering cylinder 4 to shorten; similarly, if you need to turn left, you can control the left steering cylinder 3 to shorten while the right steering cylinder 4 to extend. When facing some corner lanes with a small turning radius, on the basis of adjusting the left steering cylinder 3 and the right steering cylinder 4, it is necessary to further adjust the left swing beam 5 and the right swing beam 6 to adjust the height of the left front wheel 7, the left rear wheel 8, the right front wheel 9 and the right rear wheel 10, so as to further reduce the turning radius of the front frame 1 and the rear frame 2. Specifically, when turning right is required, the left steering cylinder 3 is controlled to extend while the right steering cylinder 4 is shortened until it reaches the limit position, and then the left cylinder group and the right cylinder group are controlled to adjust the front and rear tilt angles of the left swing beam 5 and the right swing beam 6, so that the right front wheel 9 is lowered and the pressure on the ground is increased, and the right rear wheel 10 is raised and the pressure on the ground is reduced. At the same time, the left front wheel 7 is raised and the pressure on the ground is reduced, and the left rear wheel 8 is lowered and the pressure on the ground is increased, so that the fitting steering center of the rear frame 2 can be brought inward without changing the overall center of gravity position of the rear frame 2. In this case, the purpose of reducing the outer turning radius is achieved; on the contrary, if it is necessary to turn left, the left steering cylinder 3 is controlled to shorten and the right steering cylinder 4 is extended until it reaches the limit position, and then the left cylinder group and the right cylinder group are controlled to adjust the front and rear inclination angles of the left swing beam 5 and the right swing beam 6, so that the left front wheel 7 is lowered and the pressure on the ground is increased, the left rear wheel 8 is raised and the pressure on the ground is reduced, at the same time, the right front wheel 9 is raised and the pressure on the ground is reduced, and the right rear wheel 10 is lowered and the pressure on the ground is increased, thereby further reducing the turning radius of the left turn.

[0037] In this embodiment, the left cylinder group includes a left front cylinder 11 and a left rear cylinder 12. The two ends of the left front cylinder 11 are respectively hinged to the front end of the left swing beam 5 and the rear frame 2, that is, the upper end of the left front cylinder 11 is hinged to the corresponding position of the rear frame 2, and the lower end of the left front cylinder 11 is hinged to the front upper end of the left swing beam 5. Similarly, the two ends of the left rear cylinder 12 are respectively hinged to the rear end of the left swing beam 5 and the rear frame 2. Of course, a corresponding cylinder hinge seat is provided at the upper front end of the left swing beam 5 and the corresponding position of the rear frame 2, so as to facilitate the hinge connection with the left front cylinder 11.

[0038] In actual use, when the left front cylinder 11 is extended and the left rear cylinder 12 is shortened, the left front wheel 7 moves downward and increases the pressure on the ground, and the left rear wheel 8 moves upward and reduces the pressure on the ground. Conversely, when the left front cylinder 11 is shortened and the left rear cylinder 12 is extended, the left front wheel 7 moves upward and reduces the pressure on the ground, and the left rear wheel 8 moves downward and increases the pressure on the ground.

[0039] Similarly, the right cylinder group includes a right front cylinder 13 and a right rear cylinder 14. The two ends of the right front cylinder 13 are respectively hinged to the front end of the right swing beam 6 and the rear frame 2, and the two ends of the right rear cylinder 14 are respectively hinged to the rear end of the right swing beam 6 and the rear frame 2.

[0040] In actual use, when the right front cylinder 13 is extended and the right rear cylinder 14 is shortened, the right front wheel 9 moves downward and increases the pressure on the ground, and the right rear wheel 10 moves upward and reduces the pressure on the ground. Conversely, when the right front cylinder 13 is shortened and the right rear cylinder 14 is extended, the right front wheel 9 moves upward and reduces the pressure on the ground, and the right rear wheel 10 moves downward and increases the pressure on the ground.

[0041] In other embodiments, one or more telescopic cylinders may be provided at the front end or rear end between the left swing beam 5 and the rear frame 2 (and between the right swing beam 6 and the rear frame 2). The left swing beam 5 may be driven to swing left and right by extending and retracting the telescopic cylinder, thereby adjusting the relative heights of the left front wheel 7 and the left rear wheel 8.

[0042] In this embodiment, a swing beam control pipeline is also included. The hydraulic oil flowing inside the swing beam control pipeline can be used to control the extension and retraction of the left front cylinder 11, the left rear cylinder 12, the right front cylinder 13 and the right rear cylinder 14, thereby controlling the operating state of the rear frame 2.

[0043] In this embodiment, the specific connection relationship of the swing beam control pipeline is as follows: Figure 4-Figure 5 As shown, the swing beam control pipeline includes the first swing beam inlet and outlet oil circuit 25, the second swing beam inlet and outlet oil circuit 26, the first swing beam control oil circuit 16, the second swing beam control oil circuit 17, the third swing beam control oil circuit 18, the fourth swing beam control oil circuit 19 and the two-position four-way reversing valve 15. The specific connection relationship of each component is as follows:

[0044] like Figure 4-Figure 5 As shown, the rodless chamber of the left front oil cylinder 11 and the rod chamber of the left rear oil cylinder 12 are both connected to the oil outlet end of the first swing beam inlet and outlet oil passage 25, and the oil inlet end of the first swing beam inlet and outlet oil passage 25 is the first oil inlet. Figure 4-Figure 5 The pipeline of the first swing beam inlet and outlet oil circuit 25 is a vertical pipeline plus a pipeline tilted to the right and lower. The oil inlet end of the first swing beam control oil circuit 16 is connected to the rod chamber of the left front oil cylinder 11, and the oil outlet end of the first swing beam control oil circuit 16 is connected to the first interface of the two-position four-way reversing valve 15, that is, Figure 4-Figure 5 Similarly, the rodless chamber of the left rear oil cylinder 12 and the rod chamber of the left front oil cylinder 11 are both connected to the oil outlet end of the second swing beam inlet and outlet oil circuit 26, and the oil inlet end of the second swing beam inlet and outlet oil circuit 26 is the second oil inlet. Figure 4-Figure 5The second swing beam inlet and outlet oil circuit 26 includes a vertical pipeline and a pipeline inclined to the lower left. The oil inlet end of the second swing beam control oil circuit 17 is connected to the rod chamber of the left rear oil cylinder 12, and the oil outlet end of the second swing beam control oil circuit 17 is connected to the second interface of the two-position four-way reversing valve 15, that is, Figure 4-Figure 5 The upper right corner interface of the middle two-position four-way reversing valve 15.

[0045] The oil inlet end of the third swing beam control oil circuit 18 is connected to the third interface of the two-position four-way reversing valve 15, that is, Figure 4-Figure 5 The lower left corner interface of the two-position four-way reversing valve 15, Figure 4-Figure 5 The third swing beam control oil circuit 18 is a vertical pipeline plus a section of pipeline tilted to the right and downward, so that the oil outlet end of the third swing beam control oil circuit 18 is connected to the rod chamber of the right front cylinder 13 and the rodless chamber of the right rear cylinder 14 respectively. The oil inlet end of the fourth swing beam control oil circuit 19 is connected to the fourth interface of the two-position four-way reversing valve 15, that is, Figure 4-Figure 5 The lower right corner interface of the two-position four-way reversing valve 15, Figure 4-Figure 5 The fourth swing beam control oil circuit 19 is a vertical pipeline plus a section of pipeline inclined to the lower left, and the oil outlet end of the fourth swing beam control oil circuit 19 is respectively connected to the rod cavity of the right rear cylinder 14 and the rodless cavity of the left front cylinder 13.

[0046] When the turning radius of the rear frame 2 when turning left needs to be further reduced, the position of the two-position four-way reversing valve 15 is Figure 4As shown, oil can be supplied to the first swing beam inlet and outlet oil passage 25, and the hydraulic oil sequentially enters the rodless chamber of the left front oil cylinder 11 and the rod chamber of the left rear oil cylinder 12, thereby driving the piston rod of the left front oil cylinder 11 to extend and the piston rod of the left rear oil cylinder 12 to shorten, so that the left front wheel 7 moves downward and the left rear wheel 8 moves upward. At the same time, the hydraulic oil passes through the two-position four-way reversing valve 15 and enters the rod chamber of the right front oil cylinder 13 and the rodless chamber of the right rear oil cylinder 14, so that the right front wheel 9 moves upward and the right rear wheel 10 moves downward. At the same time, the hydraulic oil in the rodless chamber of the right front cylinder 13 will also flow into the rod chamber of the right rear cylinder 14 and mix with it, and then pass through the rod chamber of the left front cylinder 11 and the rodless chamber of the left rear cylinder 12, and finally flow out from the second swing beam inlet and outlet oil circuit 26; on the contrary, if the turning radius to the right is further reduced, the oil can be supplied through the second swing beam inlet and outlet oil circuit 26, and the hydraulic oil will enter the rodless chamber of the right front cylinder 13 and the rod chamber of the right rear cylinder 14 in turn, thereby driving the piston rod of the right front cylinder 13 to extend and the piston rod of the right rear cylinder 14 to shorten, so that the right front wheel 9 moves downward while the right rear wheel 10 moves upward. At the same time, the hydraulic oil will enter the rod chamber of the left front cylinder 11 and the rodless chamber of the left rear cylinder 12 after passing through the two-position four-way reversing valve, so that the left front wheel 7 moves upward and the left rear wheel 8 moves downward. At the same time, the hydraulic oil in the rodless chamber of the right rear cylinder 14 will also flow into the rod chamber of the right front cylinder 13 and mix with it, and then pass through the rod chamber of the left rear cylinder 12 and the rodless chamber of the left front cylinder 11, and finally flow out from the first swing beam inlet and outlet oil passage 25.

[0047] When the valve core of the two-position four-way reversing valve 15 is in Figure 5 As shown, the left front wheel 7 and the right front wheel 9 can be raised and lowered at the same time, or the left rear wheel 8 and the right rear wheel 10 can be raised and lowered at the same time. The purpose of designing such a function is to deal with some special situations. For example, when the rear frame 2 is inspected and repaired, if the left front wheel 7 and the right front wheel 9 are in the way, they can be raised. In addition, the height positions of the left front wheel 7, the left rear wheel 8, the right front wheel 9 and the right rear wheel 10 are different, and their loads are also different. In simple terms, the lower the position of each wheel, the heavier its load. For example, when the left front wheel 7 is lower than the left rear wheel 8, the load of the left front wheel 7 will be greater than the load of the left rear wheel 8, and the center of gravity of the rear frame 2 will move forward. The advantage of this setting is that when the center of the heavy object carried by the rear frame 2 is offset, the balance can be maintained by adjusting the relative heights of the left front wheel 7, the left rear wheel 8, the right front wheel 9 and the right rear wheel 10. For example, when the center of the weight carried by the rear frame 2 is forward, the left front cylinder 11 and the right front cylinder 13 should be controlled to extend, thereby lowering the positions of the left front wheel 7 and the right front wheel 9 and increasing the load-bearing capacity of the front end of the rear frame 2. This can prevent the front end of the rear frame 2 from being overloaded and causing the hinge between the front frame 1 and the rear frame 2 to break.

[0048] In addition, when the two-position four-way reversing valve 15 is Figure 5 When in the middle position, a technical effect can be achieved: the wheelbase of the vehicle can be in two states: short wheelbase or long wheelbase. The short wheelbase means that the left front wheel 7 and the right front wheel 9 are on the ground. When the short wheelbase is used, the short wheelbase can increase its flexibility when the vehicle is running empty, with a smaller turning radius and greater flexibility. The long wheelbase means that the left rear wheel 8 and the right rear wheel 10 are on the ground. When the long wheelbase is used, the stability is better when it is running at high speed, because this is a long-distance fast transport vehicle.

[0049] In this embodiment, the first oil inlet and the second oil inlet are respectively connected to the two interfaces of the oil source reversing valve, the oil inlet of the oil source reversing valve is connected to the oil inlet main pipe, and the oil source reversing valve can also use an existing two-position four-way solenoid valve, that is, the first oil inlet and the second oil inlet are respectively connected to the A port and the B port of the oil source reversing valve, the oil inlet main pipe is connected to the P port of the oil source reversing valve, and the T port of the oil source reversing valve is connected to the oil tank. By controlling the valve core position of the oil source reversing valve, the oil inlet main pipe is connected to the first oil inlet or the second oil inlet.

[0050] In this embodiment, a pressure regulating valve is provided on the oil inlet main pipe; or, a regulating valve is provided on the first swing beam inlet and outlet oil passage 25 and the second swing beam inlet and outlet oil passage 26, respectively. The pressure regulating valve is an existing mature technology. The pressure regulating valve is provided to control the oil pressure of the hydraulic oil delivered to the first swing beam inlet and outlet oil passage 25 and the second swing beam inlet and outlet oil passage 26, and to ensure the delivery of hydraulic oil of different pressures according to the different pressures of the left front wheel 7, the left rear wheel 8, the right front wheel 9 and the right rear wheel 10.

[0051] In this embodiment, a steering control oil circuit is also included, and the hydraulic oil flowing inside the steering control oil circuit can be used to control the extension and retraction of the left steering cylinder 3 and the right steering cylinder 4.

[0052] In this embodiment, the steering control oil circuit includes an oil inlet line 21, an oil return line 24, a first steering control oil circuit 22, a second steering control oil circuit 23 and a reversing device 20. One end of the oil inlet line 21 is connected to the P port of the reversing device 20, and the other end is connected to the hydraulic oil source. One end of the oil return line 24 is connected to the T port of the reversing device 20, and the other end can be connected to the oil tank. One end of the first steering control oil circuit 22 is connected to the L port of the reversing device 20, as shown in FIG. Figure 6 As shown, the first steering control oil circuit 22 includes a transverse pipe and a section of pipe inclined to the upper right, and the other end of the first steering control oil circuit 22 is respectively connected to the rod chamber of the left steering oil cylinder 3 and the rodless chamber of the right steering oil cylinder 4. One end of the second steering control oil circuit 23 is connected to the R port of the reversing device 20, as shown in FIG. Figure 6As shown, the second steering control oil circuit 23 includes a transverse pipe and a section of pipeline inclined to the lower right, and the other end of the second steering control oil circuit 23 is respectively connected to the rod chamber of the right steering cylinder 4 and the rodless chamber of the left steering cylinder 3.

[0053] The reason for this arrangement is that when hydraulic oil is introduced into the rodless chamber of the left steering cylinder 3, hydraulic oil will also flow into the rod chamber of the right steering cylinder 4, thus achieving the technical effect of extending the left steering cylinder 3 while shortening the right steering cylinder 4, and vice versa.

[0054] In addition, the reversing device 20 is an existing hydraulic reversing device, which is an existing mature product, so its structure will not be further described. Of course, the reversing device 20 can also adopt an existing two-position four-way solenoid valve.

[0055] In this embodiment, the rear end of the front frame 1 is hinged with a front hinge seat 27 via a hinge pin 29, and a fixed mounting cylinder 28 is fixed to the front end of the rear frame 2. A rotating shaft 30 is rotatably connected to the interior of the fixed mounting cylinder 28 via a bearing, and one end of the rotating shaft 30 away from the fixed mounting cylinder 28 extends out of the fixed mounting cylinder 28 and is fixedly connected to the front hinge seat 27 via a screw.

[0056] In actual use, since the rear end of the front frame 1 is hinged to the front hinge seat 27 via the hinge pin 29, the front frame 1 and the rear frame 2 can be turned relative to each other. And since the front hinge seat 27 is rotatably connected to the fixed installation cylinder 28 via the rotating shaft 30, the rear frame 2 can be turned over relative to the front frame 1. Figure 2 The middle and rear frame 2 rotates about the transverse center line of the middle and rear frame 2 as an axis.

[0057] In this embodiment, a swing beam center hole is provided at the center of the left swing beam 5 and the right swing beam 6, and a frame center hole is provided on both sides of the rear frame 2. The swing beam center holes and the frame center holes correspond one to one during installation, and the swing beam center holes on the left swing beam 5 and the right swing beam 6 are hinged to the frame center holes on the rear frame 2 through swing pins.

[0058] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A small-turn articulated support transporter, comprising a front frame and a rear frame, wherein the rear end of the front frame is hinged to the front end of the rear frame, a left swing beam is provided on the left side of the rear frame, a left front wheel and a left rear wheel are provided on the left swing beam, a right swing beam is provided on the right side of the rear frame, a right front wheel and a right rear wheel are provided on the right swing beam, and the characteristics are as follows: A left steering cylinder and a right steering cylinder are also hinged between the rear end of the front frame and the front end of the rear frame. A left cylinder group is provided between the left swing beam and the left side of the rear frame, and the left cylinder group is used to adjust the front and rear tilt angle of the left swing beam. A right cylinder group is provided between the right swing beam and the right side of the rear frame, and the right cylinder group is used to adjust the front and rear tilt angle of the right swing beam.

2. The small-turn articulated support transporter according to claim 1, characterized in that: The left cylinder group includes a left front cylinder and a left rear cylinder, the two ends of the left front cylinder are respectively hinged to the front end of the left swing beam and the rear frame, and the two ends of the left rear cylinder are respectively hinged to the rear end of the left swing beam and the rear frame; The right side cylinder group includes a right front cylinder and a right rear cylinder, the two ends of the right front cylinder are respectively hinged to the front end of the right swing beam and the rear frame, and the two ends of the right rear cylinder are respectively hinged to the rear end of the right swing beam and the rear frame.

3. The small turning articulated support transporter according to claim 2, characterized in that: It also includes a swing beam control pipeline, which is used to control the extension and retraction of the left front cylinder, the left rear cylinder, the right front cylinder and the right rear cylinder.

4. The small-turn articulated support transporter according to claim 3, characterized in that: The swing beam control pipeline includes a first swing beam inlet and outlet oil circuit, a second swing beam inlet and outlet oil circuit, a first swing beam control oil circuit, a second swing beam control oil circuit, a third swing beam control oil circuit, a fourth swing beam control oil circuit and a two-position four-way reversing valve; The rodless chamber of the left front cylinder and the rod chamber of the left rear cylinder are both connected to the first swing beam inlet and outlet oil circuit, and the oil inlet end of the first swing beam inlet and outlet oil circuit is the first oil inlet port; the oil inlet end of the first swing beam control oil circuit is connected to the rod chamber of the left front cylinder, and the oil outlet end of the first swing beam control oil circuit is connected to the first interface of the two-position four-way reversing valve; the rodless chamber of the left rear cylinder and the rod chamber of the left front cylinder are both connected to the second swing beam inlet and outlet oil circuit, and the oil inlet end of the second swing beam inlet and outlet oil circuit is the second oil inlet port; the oil inlet end of the second swing beam control oil circuit is connected to the rod chamber of the left rear cylinder, and the oil outlet end of the second swing beam control oil circuit is connected to the second interface of the two-position four-way reversing valve; The oil inlet end of the third swing beam control oil circuit is connected to the third interface of the two-position four-way reversing valve, and the oil outlet end of the third swing beam control oil circuit is respectively connected to the rod chamber of the right front cylinder and the rodless chamber of the right rear cylinder; the oil inlet end of the fourth swing beam control oil circuit is connected to the fourth interface of the two-position four-way reversing valve, and the oil outlet end of the fourth swing beam control oil circuit is respectively connected to the rod chamber of the right rear cylinder and the rodless chamber of the right front cylinder.

5. The small-turn articulated support transporter according to claim 4, characterized in that: The first oil inlet and the second oil inlet are respectively connected to two interfaces of the oil source reversing valve, and the oil inlet of the oil source reversing valve is connected to the oil inlet main pipe.

6. The small-turn articulated support transporter according to claim 5, characterized in that: The oil inlet main pipe is provided with a pressure regulating valve; or, the first swing beam oil inlet and outlet circuit and the second swing beam oil inlet and outlet circuit are respectively provided with a regulating valve.

7. The small-turn articulated support transporter according to claim 1, characterized in that: It also includes a steering control oil circuit, which is used to control the extension and retraction of the left steering cylinder and the right steering cylinder.

8. The small-turn articulated support transporter according to claim 7, characterized in that: The steering control oil circuit includes an oil inlet pipeline, an oil return pipeline, a first steering control oil circuit, a second steering control oil circuit and a reversing device, one end of the oil inlet pipeline is connected to the P port of the reversing device, one end of the oil return pipeline is connected to the T port of the reversing device, one end of the first steering control oil circuit is connected to the L port of the reversing device, the other end of the first steering control oil circuit is respectively connected to the rod chamber of the left steering cylinder and the rodless chamber of the right steering cylinder, one end of the second steering control oil circuit is connected to the R port of the reversing device, and the other end of the second steering control oil circuit is respectively connected to the rod chamber of the right steering cylinder and the rodless chamber of the left steering cylinder.

9. The small-turn articulated support transporter according to claim 1, characterized in that: The rear end of the front frame is hinged with a front articulated seat, the front end of the rear frame is fixed with a fixed installation cylinder, a rotating shaft is rotatably connected in the fixed installation cylinder, and one end of the rotating shaft away from the fixed installation cylinder is fixedly connected to the front articulated seat.

10. The small-turn articulated support transporter according to claim 1, characterized in that: The left swing beam and the right swing beam are each provided with a swing beam center hole at their centers, and a frame center hole is provided at both sides of the rear frame. The left swing beam and the right swing beam are both hinged to the rear frame via a swing pin shaft.

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