Lifting workbench

Abstract

The utility model relates to the technical field of lifting workbenches, in particular to a lifting workbench. Comprising a lifting mechanism installed on a vehicle body, the lifting mechanism comprises a right-trapezoid-shaped joint supporting piece a arranged on the rear side of a chassis base, and two folding first arms and first arm connecting rods are rotationally arranged at the bevel edge positions of the left side and the right side of the joint supporting piece a correspondingly; the two first folding arms are parallel to the other ends of the first arm connecting rods and rotationally connected to the lower portions of the rear ends of the two sides of the joint supporting piece b, the second folding arms are rotationally installed on the top of the joint supporting piece b, and the second arm connecting rods are installed on the joint supporting piece b and below the second folding arms. The folding arm II and the arm II connecting rod are parallel, and the other ends of the folding arm II and the arm II connecting rod are rotationally connected to the bottom of the rear joint supporting piece c; the movable radius of the working platform can be 18 meters at most and 10 meters at most, the minimum occupied area of the vehicle body does not exceed 6 square meters, and the operation process is very stable.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting work platforms, in particular to a lifting work platform. Background Art

[0002] A lifting platform is a lifting device used for aerial work. Conventional lifting platforms are generally connected to a vehicle body structure to ensure that they can be moved at any time. However, for example, the published patent document CN 117416903 A has problems such as inflexible vehicle steering, insufficient lifting tilt angle and lateral length, etc. When facing some narrow alleys, large aerial work vehicles cannot enter for work, and the disclosed work vehicles cannot achieve the required lifting height, tilt angle, lateral extension length, etc. Therefore, there is an urgent need for a lifting work platform with a reasonable and stable mechanical structure that can solve the above problems. Utility Model Content

[0003] In order to make up for the deficiencies in the prior art and achieve the above functions, the utility model provides a lifting workbench.

[0004] The utility model is achieved through the following technical solutions:

[0005] A lifting work platform comprises a lifting mechanism mounted on a vehicle body, wherein the vehicle body comprises driving wheels mounted on four corners of a chassis, and the chassis is connected to a chassis base of the lifting mechanism above via a steering support.

[0006] The lifting mechanism also includes a right-angled trapezoidal joint support member a provided at the rear side of the chassis base, the joint support member a being hollow and having a pad a provided at the middle bottom, two folding one-arm and one-arm connecting rods being rotatably provided at the hypotenuse positions on the left and right sides of the joint support member a, the other ends of the two folding one-arm and one-arm connecting rods being parallel and rotatably connected to the lower rear ends of the two sides of the joint support member b;

[0007] The joint support member b is welded from multiple sheet metal parts and is located directly above the front end of the chassis base. Two folding arms are rotatably mounted on the top of the joint support member b. A two-arm connecting rod is mounted below the two folding arms and on the joint support member b. The two folding arms and the two-arm connecting rod are parallel and the other ends of the two folding arms are rotatably connected to the bottom position of the rear joint support member c. A lifting cylinder a is rotatably connected to the bottom of the two folding arms at the middle position of the rear side of the joint support member b.

[0008] The joint support member c is in the shape of an upright isosceles triangle and is located in the space in the middle of the joint support member a. A folding three-arm is rotatably mounted on the top of the joint support member c. A lifting cylinder b is rotatably mounted on the joint support member c at the top corner of the front end of the joint support member c, and the other end of the lifting cylinder b is rotatably fixed to the bottom of the folding three-arm. A horizontal cylinder rotatably connected to the tail end of the folding three-arm is provided in the joint support member c.

[0009] The front end of the folding three arms is connected with a working platform swing mechanism.

[0010] Furthermore, the folding three-arm structure is a hollow structure and a push-pull cylinder capable of extending and retracting outward is installed in the internal cavity. A fixing piece is installed at the front end of the push-pull cylinder, and an angle connecting rod and an angle adjustment cylinder are rotatably connected in the fixing piece. The angle connecting rod is located above the angle adjustment cylinder and both are rotatably connected to the connecting block a at the front end.

[0011] The connecting block a is fixedly connected to the connecting block at the tail of the working platform swing mechanism. The working platform swing mechanism also includes two movable upper arms and a movable lower arm that are rotatably connected to both sides of the connecting block. The two are parallel and the other ends are rotatably connected to the upper and lower parts of the rotating base respectively. A lifting cylinder c is provided between the movable upper arm and the movable lower arm, which connects the rotating base and the connecting block front and back. The front end of the rotating base is connected to the working platform at the front end through the swing cylinder.

[0012] Furthermore, a battery box and a shield are provided on the chassis base. The shield is located outside the lifting mechanism and a counterweight is provided between the lifting mechanisms.

[0013] Furthermore, the lengths of the folding first arm and the first-arm connecting rod are equal, the lengths of the folding second arm and the second-arm connecting rod are equal, and both are located in the middle space of the joint support member a;

[0014] A pad b is provided above the joint support member. When the joint support member c is at the lowest point, it abuts against the pad a. When the folding three-arm is at the lowest point in the folded state, it abuts against the pad b.

[0015] Furthermore, when the lifting cylinder a is extended, the front lower portion of the folding arm and the arm connecting rod is passively lifted obliquely upward toward the rear end, and at the same time, the rear lower portion of the folding arm and the arm connecting rod is passively lifted obliquely upward toward the front end, the joint support member b is passively lifted obliquely upward toward the rear end, and the joint support member c is passively lifted obliquely upward toward the front end;

[0016] When the lifting oil cylinder b is extended, the rear end lower position of the folding two arms and the two-arm connecting rod is passively lifted obliquely toward the front end upper position, and at the same time, the horizontal oil cylinder is extended, and the folding three arms will be passively upright.

[0017] Furthermore, the working platform swing mechanism can be pushed out by the push-pull cylinder, the angle adjustment cylinder and the lifting cylinder c can control the up and down offset angle of the working platform by extending and contracting, and the swing cylinder can control the left and right steering of the working platform;

[0018] The steering support is provided with a steering oil cylinder and can control the 360-degree rotation of the steering support. The rotation of the steering support drives the rotation of the upper chassis base.

[0019] Furthermore, the vehicle body is equipped with a built-in hydraulic control unit connected to all oil cylinders.

[0020] The beneficial effects of the utility model are:

[0021] The utility model can provide an operating platform with a maximum height of 18 meters and a maximum activity radius of 10 meters, and the minimum floor space of the vehicle body does not exceed 6 square meters, so it can enter narrow areas such as alleys and lanes to perform high-altitude operations; the lifting mechanism of the utility model is supported by a left-right symmetrical structure, and the upward parts are located in the middle position, and the lower parts are located on the left and right sides for bottom support, which can ensure that it will not tip over when lifted to the top position or the most horizontal position; the steering parts of the utility model are all quantitatively controlled by hydraulic cylinders, and the control is stable and not prone to overload failure; the utility model has flexible steering at all angles, which is convenient for personnel on the working platform to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0023] Figure 2 This is a structural diagram of the swing mechanism of the working platform of the utility model;

[0024] Figure 3 for Figure 1 A side view of the internal structure of the lifting mechanism;

[0025] Figure 4 for Figure 3 A half-section diagram of the lifting structure;

[0026] Figure 5 This is a schematic diagram of the structure after the front half of the lifting structure is cut in half;

[0027] Figure 6 for Figure 2 Schematic diagram of oblique rear observation.

[0028] In the picture:

[0029] 1. Vehicle body, 101. Driving wheel, 102. Chassis, 103. Guard, 104. Battery box,

[0030] 2. Steering support, 201. Steering cylinder,

[0031] 3. Chassis base, 301, support block, 302, pad a,

[0032] 4. Joint support a,

[0033] 5. Fold one arm, 501, one arm connecting rod, 502, lift cylinder a, 503, bottom plate,

[0034] 6. Joint support b, 601, pad b,

[0035] 7. Folding two arms, 701, two-arm connecting rod,

[0036] 8. Joint support c, 801, horizontal cylinder,

[0037] 9. Folding three arms, 901. Lifting cylinder b, 902. Push-pull cylinder, 903. Fixing parts, 904. Angle connecting rod, 905. Angle adjustment cylinder, 906. Connecting block a,

[0038] 10. Connecting block b, 1001. Movable upper arm, 1002. Movable lower arm, 1003. Lifting cylinder c, 1004. Rotating base,

[0039] 11. Swing cylinder, 12. Work platform. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in a variety of different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0042] like Figures 1 to 6 As shown, the present invention includes a lifting mechanism mounted on a vehicle body 1, wherein the vehicle body 1 includes driving wheels 101 mounted on the four corners of a chassis 102, and the chassis 102 is connected to a chassis base 3 of the lifting mechanism above via a steering support 2;

[0043] The lifting mechanism also includes a right-angled trapezoidal joint support a4 provided on the rear side of the chassis base 3. The joint support a4 is hollow and has a pad a302 at the middle bottom. Two folding arms 5 and an arm connecting rod 501 are rotatably provided at the hypotenuse positions on the left and right sides of the joint support a4. The other ends of the two folding arms 5 and the arm connecting rod 501 are parallel and rotatably connected to the lower rear ends of both sides of the joint support b6, that is, the lower side of the folding arm 5 and the upper side of the arm connecting rod 501, i.e., the front and rear sides, form a parallelogram, and the width of the folding arm 5 is greater than that of the arm connecting rod 501, which plays a major lifting and supporting role.

[0044] The joint support member b6 is welded from multiple sheet metal parts and is located directly above the front end of the chassis base 3. A folding second arm 7 is rotatably mounted on the top of the joint support member b6. A two-arm connecting rod 701 is mounted below the folding second arm 7 and on the joint support member b6. The folding second arm 7 and the two-arm connecting rod 701 are parallel to each other, and the other ends of the two are rotatably connected to the bottom position of the rear joint support member c8. A lifting cylinder a502 is provided in the middle position of the rear side of the joint support member b6, which is rotatably connected to the bottom of the folding second arm 7.

[0045] The joint support c8 is in the shape of an upright isosceles triangle and is located in the space in the middle of the joint support a4. A folding three-arm 9 is rotatably installed on the top of the joint support c8. A lifting cylinder b901 is rotatably installed on the joint support c8 at the top corner of the front end, and the other end of the lifting cylinder b901 is rotatably fixed to the bottom of the folding three-arm 9. A horizontal cylinder 801 is rotatably connected to the tail end of the folding three-arm 9 is provided in the joint support c8; thus, the joint support c8, the folding two-arm 7, the two-arm connecting rod 701, the horizontal cylinder 801 and the lifting cylinder b901 are all located in the middle position of the equipment, laying a stable lifting foundation.

[0046] The front end of the folding three-arm 9 is connected to a working platform swing mechanism.

[0047] The folding three-arm 9 is a hollow structure and a push-pull cylinder 902 that can be extended and retracted outward is installed in the internal cavity. A fixing part 903 is installed at the front end of the push-pull cylinder 902, and an angle connecting rod 904 and an angle adjustment cylinder 905 are rotatably connected in the fixing part 903. The angle connecting rod 904 is located above the angle adjustment cylinder 905 and both are rotatably connected to the connecting block a906 at the front end.

[0048] The connecting block a906 is fixedly connected to the connecting block 10 at the tail of the working platform swing mechanism. The working platform swing mechanism also includes two movable upper arms 1001 and movable lower arms 1002 that are rotatably connected to both sides of the connecting block 10. The two are parallel and the other ends are rotatably connected to the upper and lower sides of the rotating base 1004 respectively. A lifting cylinder c1003 is provided between the movable upper arm 1001 and the movable lower arm 1002, which connects the rotating base 1004 and the connecting block 10 front and back. The front end of the rotating base 1004 is connected to the working platform 12 at the front end through the swing cylinder 11.

[0049] A battery box 104 and a shield 103 are also provided on the chassis base 3. The shield 103 is located outside the lifting mechanism and a counterweight is provided between the lifting mechanisms.

[0050] The folding first arm 5 and the first arm connecting rod 501 are of equal length; the folding second arm 7 and the second arm connecting rod 701 are of equal length and both are located in the middle space of the joint support a4;

[0051] A pad b601 is provided above the joint support member 6 , and the joint support member c8 abuts against the pad a302 when it is at the lowest point, and the folding three-arm abuts against the pad b601 when it is at the lowest point in the folded state.

[0052] When the lifting cylinder a502 is extended, the front lower portion of the folding arm 5 and the arm connecting rod 501 is passively lifted obliquely upward toward the rear end, and at the same time, the rear lower portion of the folding arm 7 and the arm connecting rod 701 is passively lifted obliquely upward toward the front end, the joint support member b6 is passively lifted obliquely upward toward the rear end, and the joint support member c8 is passively lifted obliquely upward toward the front end;

[0053] When the lifting cylinder b901 is extended, the rear lower portion of the folding two arms 7 and the two-arm connecting rod 701 is passively lifted obliquely upward toward the front end. At the same time, the horizontal cylinder 801 is extended, and the folding three arms 9 are passively erected.

[0054] The working platform swing mechanism can be pushed out by the push-pull cylinder 902. The angle adjustment cylinder 905 and the lifting cylinder c1003 can control the up and down offset angle of the working platform 12 by extending and contracting. The swing cylinder 11 can control the left and right steering of the working platform 12.

[0055] The steering support 2 is provided with a steering oil cylinder 201 and is capable of controlling the 360-degree rotation of the steering support 2 . The rotation of the steering support 2 drives the rotation of the upper chassis base 3 .

[0056] The vehicle body 1 is internally provided with a hydraulic control unit connected to all the oil cylinders to control the quantitative steering of all the oil cylinders.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A lifting work platform, comprising a lifting mechanism mounted on a vehicle body (1), wherein the vehicle body (1) comprises driving wheels (101) mounted at four corners of a chassis (102), characterized in that: The chassis (102) is connected to a chassis base (3) of an upper lifting mechanism via a steering support (2); The lifting mechanism also includes a right-angled trapezoidal joint support member a (4) provided on the rear side of the chassis base (3), wherein the joint support member a (4) is hollow and a pad a (302) is provided at the middle bottom, and two folding arms (5) and an arm connecting rod (501) are rotatably provided at the oblique positions on the left and right sides of the joint support member a (4), and the other ends of the two folding arms (5) and the arm connecting rod (501) are parallel and rotatably connected to the lower rear ends of the two sides of the joint support member b (6); The joint support member b (6) is welded from a plurality of sheet metal parts and is located just above the front end of the chassis base (3). A folding two-arm (7) is rotatably mounted on the top of the joint support member b (6). A two-arm connecting rod (701) is mounted below the folding two-arm (7) and on the joint support member b (6). The folding two-arm (7) and the two-arm connecting rod (701) are parallel to each other and the other ends of the two are rotatably connected to the bottom position of the rear joint support member c (8). A lifting cylinder a (502) rotatably connected to the bottom position of the folding two-arm (7) is provided in the middle position of the rear side of the joint support member b (6); The joint support member c (8) is in the shape of an upright isosceles triangle and is located in the space in the middle of the joint support member a (4). A folding three-arm (9) is rotatably mounted on the top of the joint support member c (8). A lifting cylinder b (901) is rotatably mounted on the joint support member c (8) at the top corner of the front end of the joint support member c (8). The other end of the lifting cylinder b (901) is rotatably fixed to the bottom of the folding three-arm (9). A horizontal cylinder (801) is rotatably connected to the tail end of the folding three-arm (9) in the joint support member c (8). The front end of the folding three arms (9) is connected to a working platform swing mechanism.

2. The lifting work platform according to claim 1, characterized in that: The folding three-arm (9) is a hollow structure, and a push-pull oil cylinder (902) capable of extending and retracting outward is installed in the internal cavity. A fixing member (903) is installed at the front end of the push-pull oil cylinder (902), and an angle connecting rod (904) and an angle adjustment oil cylinder (905) are rotatably connected in the fixing member (903). The angle connecting rod (904) is located above the angle adjustment oil cylinder (905), and both are rotatably connected to the connecting block a (906) at the front end. The connecting block a (906) is fixedly connected to the connecting block (10) at the tail end of the working platform swing mechanism. The working platform swing mechanism also includes two movable upper arms (1001) and movable lower arms (1002) that are rotatably connected to both sides of the connecting block (10). The two are parallel and the other ends are rotatably connected to the upper and lower parts of the rotating base (1004) respectively. A lifting cylinder c (1003) that connects the rotating base (1004) and the connecting block (10) is provided between the movable upper arm (1001) and the movable lower arm (1002). The front end of the rotating base (1004) is connected to the working platform (12) at the front end through the swing cylinder (11).

3. The lifting work platform according to claim 1, characterized in that: A battery box (104) and a shield (103) are also provided on the chassis base (3); the shield (103) is located outside the lifting mechanism and a counterweight is provided between the lifting mechanisms.

4. The lifting work platform according to claim 1, characterized in that: The folding first arm (5) and the first-arm connecting rod (501) are of equal length, the folding second arm (7) and the second-arm connecting rod (701) are of equal length, and both are located in the middle space of the joint support member a (4); A pad b (601) is provided above the joint support member b (6); the joint support member c (8) abuts against the pad a (302) when it is at its lowest point; and the folding three-arm (9) abuts against the pad b (601) when it is at its lowest point in the folded state.

5. The lifting work platform according to claim 1, characterized in that: When the lifting cylinder a (502) is extended, the front lower portion of the folded one arm (5) and the one-arm connecting rod (501) is passively lifted obliquely upward toward the rear end, and simultaneously the rear lower portion of the folded two arms (7) and the two-arm connecting rod (701) is passively lifted obliquely upward toward the front end, the joint support member b (6) is passively lifted obliquely upward toward the rear end, and the joint support member c (8) is passively lifted obliquely upward toward the front end; When the lifting cylinder b (901) is extended, the rear end lower position of the folding two arms (7) and the two-arm connecting rod (701) is passively lifted obliquely toward the front end upper position, and at the same time, the horizontal cylinder (801) is extended, and the folding three arms (9) are passively upright.

6. The lifting work platform according to claim 2, characterized in that: The working platform swing mechanism can be pushed out by the push-pull cylinder (902), the angle adjustment cylinder (905) and the lifting cylinder c (1003) can control the up and down offset angles of the working platform (12) by extending and contracting, and the swing cylinder (11) can control the left and right steering of the working platform (12); The steering support (2) is provided with a steering oil cylinder (201) capable of controlling the 360-degree rotation of the steering support (2). The rotation of the steering support (2) drives the rotation of the upper chassis base (3).

7. The lifting work platform according to claim 1, characterized in that: The vehicle body (1) is internally provided with a hydraulic control unit connected to all oil cylinders.

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