Container double-arm forklift

Abstract

The utility model discloses a container double-arm forklift which comprises a forklift frame, and the part, close to the tail of the forklift, of the forklift frame is provided with a supporting tilting part. The forklift further comprises a lifting assembly, the lifting assembly comprises telescopic cargo booms, the fixed ends of the telescopic cargo booms are hinged to the top of the supporting tilting part, fork frame assemblies are fixedly installed at the telescopic ends of the telescopic cargo booms, and the telescopic cargo booms are symmetrically installed on the two sides of a cab of the forklift respectively. The cylinder barrel end of the first oil cylinder is hinged to the middle of the supporting tilting part, and the telescopic end of the first oil cylinder is hinged to the bottom of the telescopic cargo boom; the cylinder barrel end of the second oil cylinder is hinged to the frame, and the telescopic end of the second oil cylinder is hinged to the bottom of the telescopic cargo boom; and the top of the supporting tilting part is positioned above a rear wheel of the forklift.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a container double-arm forklift. Background Art

[0002] In the existing container forklift, the connection between the fork frame assembly and the forklift body is located at the front end of the forklift, so that when the forklift is transporting goods, the overall center of gravity is biased toward the front end of the forklift. When faced with overweight goods, the forklift will tip forward, causing accidents. Utility Model Content

[0003] The utility model aims to solve the above-mentioned problem and provides a container double-arm forklift.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The utility model provides a container double-arm forklift, the forklift comprising: a frame, the part of the frame close to the rear of the forklift having a supporting tilting part;

[0006] The forklift further comprises: a lifting assembly, the lifting assembly comprising:

[0007] A telescopic boom, wherein the fixed end of the telescopic boom is hinged to the top of the supporting tilting portion, and a fork frame assembly is fixedly mounted on the telescopic end. A pair of telescopic booms are provided and are symmetrically mounted on both sides of the cab of the forklift respectively;

[0008] A first oil cylinder, wherein a cylinder end of the first oil cylinder is hinged to the middle of the supporting tilting portion, and a telescopic end of the first oil cylinder is hinged to the bottom of the telescopic lifting arm;

[0009] a second oil cylinder, wherein a cylinder end of the second oil cylinder is hinged to the frame and a telescopic end is hinged to the bottom of the telescopic boom;

[0010] The top of the supporting tilting portion is located above the rear wheel of the forklift.

[0011] The advantages or beneficial effects of the above technical solution include at least:

[0012] The position of the telescopic boom corresponds to the position of the tires on the left and right sides of the forklift, so that when the forklift is lifting the goods, the force point of the tire supporting the vehicle body and the force point of the telescopic boom correspond to each other on the horizontal projection plane and tend to the same vertical axis. Figure 8 As shown in the figure (the tires are omitted in the circular diagram), Fx is the support force of the tire supporting the vehicle body, and Fx is the downward force of the telescopic lifting arm on the entire frame, so as to ensure uniform force on the whole vehicle and balanced force on both sides of the forklift, and reduce the forklift tipping to both sides during the lifting of goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings show exemplary implementations of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are included in and constitute a part of this specification.

[0014] Figure 1 A schematic diagram showing a forklift according to an embodiment of the utility model after the fork frame is retracted;

[0015] Figure 2 A schematic diagram showing a forklift according to an embodiment of the utility model after the fork frame is extended;

[0016] Figure 3 A schematic diagram showing the position of the first triangular area in an embodiment of the utility model is shown;

[0017] Figure 4 A schematic diagram showing the position of the second triangular area in an embodiment of the utility model is shown;

[0018] Figure 5 A schematic diagram showing the cylinder end of the second oil cylinder of the embodiment of the utility model before and after movement;

[0019] Figure 6 A schematic diagram showing the positions of the lead screw, the motor and the adapter frame of an embodiment of the utility model is shown;

[0020] Figure 7 A schematic diagram showing a guide rail of an embodiment of the utility model is shown;

[0021] Figure 8 A first force analysis schematic diagram of a forklift according to an embodiment of the utility model is shown;

[0022] Fig. 9 A second analysis schematic diagram of a forklift according to an embodiment of the utility model is shown;

[0023] Fig.10 A third analysis schematic diagram of a forklift according to an embodiment of the utility model is shown;

[0024] Fig.11 A fourth force analysis schematic diagram of a forklift according to an embodiment of the utility model is shown;

[0025] Figure numerals: 10, forklift; 11, frame; 111, support tilting part; 112, junction; 12, slide groove; 121, guide rail; 20, lifting assembly; 21, telescopic lifting arm; 22, first cylinder; 23, second cylinder; 30, moving assembly; 31, screw rod; 32, adapter frame; 33, motor; 40, fork frame assembly. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be understood that the term "including" and its variations used in this article are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in the utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0029] It should be noted that the modifications of “one” and “plurality” mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as “one or more”.

[0030] The names of the messages or information exchanged between multiple devices in the implementation manner of the present invention are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0031] Reference Figure 1 A container double arm forklift 10, the forklift 10 includes: a frame 11, and a portion of the frame 11 near the rear of the forklift 10 has a supporting tilting portion 111, such as Figure 1 As shown, the support tilting portion 111 extends upward toward the tail of the forklift 10; the forklift 10 further includes: a lifting assembly 20, wherein the lifting assembly 20 includes:

[0032] A telescopic boom 21, the fixed end of which is hinged at the top of the supporting tilting portion 111, and a fork frame assembly 40 is fixedly installed at the telescopic end, and the fork frame assembly 40 is used to forklift cargo such as containers. In addition, a pair of telescopic booms 21 are provided, and are symmetrically installed on both sides of the cab of the forklift 10, respectively. The top of the supporting tilting portion 111 is located above the rear wheel of the forklift 10, and the position of the telescopic boom 21 corresponds to the position of the tires on the left and right sides of the forklift 10, so that when the forklift 10 is lifting cargo, the force point of the tire supporting the vehicle body and the force point of the telescopic boom 21 correspond to each other on the horizontal projection plane, and tend to the same vertical axis, such as Figure 8 As shown in Fx and Fy (the tire is omitted in the circular diagram), Fx is the supporting force of the tire supporting the vehicle body, and Fx is the downward force of the telescopic lifting arm 21 on the frame 11 as a whole, so as to ensure the uniform force of the whole vehicle and the balanced force on both sides of the forklift 10, thereby reducing the forklift 10 from tipping over to both sides during the process of lifting the goods.

[0033] Based on the above, the lifting assembly 20 further includes: a first oil cylinder 22 and a second oil cylinder 23, wherein the cylinder end of the first oil cylinder 22 is hinged to the middle of the supporting tilting portion 111, and the telescopic end is hinged to the bottom of the telescopic lifting arm 21, so that a first triangular area is formed between the first oil cylinder 22, the telescopic lifting arm 21 and the supporting tilting portion 111, such as Figure 3 As shown, in order to enhance the structural stability of the telescopic boom 21 in this part, when the first cylinder 22 is extended, the initial lifting of the telescopic boom 21 can be achieved; the cylinder end of the second cylinder 23 is hinged to the frame 11, and the telescopic end is hinged to the bottom of the telescopic boom 21. The cylinder end of the second cylinder 23 is hinged to the junction 112 of the frame 11 and the supporting tilting part 111, so that a second triangular area is formed between the second cylinder 23, the telescopic boom 21 and the junction 112, as shown in FIG. Figure 4 As shown, after the first oil cylinder 22 drives the telescopic boom 21 to initially lift, the second oil cylinder 23 further lifts the boom, and at this time the first triangular area and the second triangular area can make the boom swing upward stably.

[0034] The distance from the junction 112 to the front of the forklift 10 is , the distance from the junction 112 to the rear of the forklift 10 is ,in ≥ ;like Figure 4 As shown, at the same time, the distance from the middle of the supporting tilting portion 111 to the front of the forklift 10 is , the distance from the junction 112 to the rear of the forklift 10 is ,in ≥ , so that the cylinder ends of the first cylinder 22 and the second cylinder 23 are located as a whole at the rear of the forklift 10, so that the center of gravity of the forklift 10 is concentrated at the rear of the vehicle during the cargo handling process of the forklift 10, which can effectively prevent the forklift 10 from tipping over.

[0035] In the second embodiment based on the above structure, a slide groove 12 is provided on the frame 11; in addition, the forklift 10 also includes: a moving component 30, which is used to make the cylinder end of the second cylinder 23 move axially along the slide groove 12, and the moving component 30 includes: a screw rod 31, which is rotatably installed in the slide groove 12; an adapter frame 32, which is threadedly matched with the screw rod 31, and the cylinder end of the second cylinder 23 is hinged on the adapter frame 32; a motor 33, which is installed on the frame 11, and is used to rotate the screw rod 31 so that the adapter frame 32 moves axially along the screw rod 31.

[0036] The motor 33 is used to rotate the screw rod 31, so that the cylinder end of the second oil cylinder 23 moves from the part near the rear of the vehicle to the part near the front of the vehicle at the predetermined position, wherein the predetermined position is the hinge point between the telescopic end of the second oil cylinder 23 and the telescopic boom 21. Figures 9 to 11 As shown, the predetermined position is the position of the single-point long dash line, so that the axial direction of the second oil cylinder 23 is perpendicular to the axial direction of the telescopic boom 21, so as to increase the effective work of the second oil cylinder 23, as follows:

[0037] Please refer to Fig. 9 In the figure, G is the force exerted by the fork assembly 40 on the telescopic boom 21 during the transportation of goods, F1 is the supporting force of the second oil cylinder 23 on the telescopic boom 21, F11 and F12 are the two forces in the vertical direction and the horizontal direction respectively separated by F1, and L is the normal line of the telescopic boom perpendicular to its surface. Fig. 9 It can be seen that the direction of F1 is inconsistent with L, and has an angle tending to ninety degrees, resulting in only F11 being the effective work of the telescopic boom 21, and the direction of F12 is away from the telescopic boom 21, resulting in F12 being ineffective work; at this time, when the motor 33 rotates the screw rod 31, and the adapter 32 moves along the axial direction of the screw rod 31, the position of the cylinder end of the second oil cylinder 23 changes, and in the process of the cylinder end moving toward the predetermined position, the angle a between F1 and L becomes larger, and the cylinder end of the second oil cylinder 23 moves to overlap with the predetermined position and moves to the part of the predetermined position close to the front of the vehicle, such as Figure 10 to Figure 11 As shown, when reaching Fig.11 When the position of F12 is in the right position, the direction of F12 is toward the telescopic boom 21, so that both F11 and F12 are effectively working, achieving a more stable support. With further movement, when the angle a reaches 180°, that is, when the second oil cylinder 23 is perpendicular to the telescopic boom 21, it is the best support position. At this time, F1 and L are in the same straight line, so that the load of the telescopic boom 21 is Fig. 9The location in the middle is bigger.

[0038] After completing the operation, the user needs to lower the telescopic boom 21, and then rotate the screw rod 31 through the motor 33 to move the adapter frame 32 until it moves to the position as shown in the figure. Fig. 9 The telescopic boom 21 can be lowered by retracting the first oil cylinder 22 and the second oil cylinder 23. Figure 2 to Figure 1 Of course, it is worth noting that in order to keep the height position of the fork frame assembly 40 unchanged, during the movement of the cylinder end of the second oil cylinder 23, the telescopic end of the second oil cylinder 23 is still continuously contracted to ensure that the height position of the fork frame assembly 40 remains unchanged.

[0039] Based on the above structure, the part of the frame 11 in the slide groove 12 is provided with a guide rail 121, and the extension direction of the guide rail 121 is consistent with the extension direction of the slide groove 12; the adapter frame 32 can be slidably embedded in the guide rail 121 to guide the moving direction of the adapter frame 32, and there is a fixed gap between the bottom of the adapter frame 32 and the bottom of the slide groove 12 to avoid friction between the adapter frame 32 and the bottom of the slide groove 12, and the middle part of the adapter frame 32 is in contact with the top of the guide rail 121, so that the force transmitted to the guide frame by the second oil cylinder 23 can be transmitted to the top of the guide rail 121.

[0040] Furthermore, the motor 33 is installed at the part of the frame 11 close to the front of the forklift 10. Since the load of the forklift 10 needs to be increased, the motor 33 needs to be started to move the cylinder end position of the second cylinder 23. Therefore, when the motor 33 arranged in the front rotates the screw rod 31, the distance between the motor 33 and the adapter frame 32 is the largest in the entire moving stroke. At this time, the lever arm is the largest. Under the condition of unchanged force, the motor 33 can achieve the effect of saving effort and save electricity transmission.

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0042] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A container double-arm forklift, characterized in that: The forklift (10) comprises: a frame (11), wherein a portion of the frame (11) close to the rear of the forklift (10) has a supporting raised portion (111); The forklift (10) further comprises: a lifting assembly (20), wherein the lifting assembly (20) comprises: A telescopic boom (21), wherein a fixed end of the telescopic boom (21) is hinged to the top of the supporting tilting portion (111), a fork frame assembly (40) is fixedly mounted on the telescopic end, and a pair of telescopic booms (21) are provided and are symmetrically mounted on both sides of the cab of the forklift (10); A first oil cylinder (22), wherein a cylinder end of the first oil cylinder (22) is hinged to the middle of the supporting tilting portion (111), and a telescopic end is hinged to the bottom of the telescopic lifting arm (21); a second oil cylinder (23), wherein a cylinder end of the second oil cylinder (23) is hinged to the vehicle frame (11), and a telescopic end is hinged to the bottom of the telescopic lifting arm (21); The top of the supporting tilted portion (111) is located above the rear wheel of the forklift (10).

2. The container double-arm forklift according to claim 1, characterized in that: The cylinder end of the second oil cylinder (23) is hinged to the junction (112) between the vehicle frame (11) and the supporting raised portion (111); The distance from the junction (112) to the front of the forklift (10) is , the distance from the junction (112) to the rear of the forklift (10) is ,in ≥ ; The distance from the middle of the supporting tilted portion (111) to the front of the forklift (10) is , the distance from the junction (112) to the rear of the forklift (10) is ,in ≥ .

3. The container double-arm forklift according to claim 2, characterized in that: The frame (11) is provided with a slide groove (12); The forklift (10) further comprises: a moving assembly (30) for causing the cylinder end of the second oil cylinder (23) to move axially along the slide groove (12), the moving assembly (30) comprising: A screw rod (31) rotatably mounted in the slide groove (12); An adapter frame (32) is threadably matched with the screw rod (31), and a cylinder end of the second oil cylinder (23) is hingedly connected to the adapter frame (32); The motor (33) is mounted on the vehicle frame (11) and is used to rotate the screw rod (31) so that the adapter frame (32) moves along the axial direction of the screw rod (31).

4. The container double-arm forklift according to claim 3, characterized in that: The portion of the vehicle frame (11) within the slide groove (12) is provided with a guide rail (121), and the extension direction of the guide rail (121) is consistent with the extension direction of the slide groove (12); The adapter frame (32) can be slidably embedded in the guide rail (121).

5. The container double-arm forklift according to claim 4, characterized in that: There is a fixed gap between the bottom of the adapter frame (32) and the bottom of the slide groove (12), and the middle of the adapter frame (32) fits with the top of the guide rail (121).

6. The container double-arm forklift according to claim 5, characterized in that: The motor (33) is mounted on a portion of the frame (11) close to the front of the forklift (10).

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