forklift

Abstract

The present application discloses a forklift including a vehicle body, a fork, and a forward movement drive mechanism, wherein the vehicle body includes a main body and two support arms, the main body having two opposite ends, the two support arms respectively provided at the two ends of the body and extending toward the rear of the vehicle body, the two support arms being provided opposite each other and forming an accommodation space together with the body, a first mounting space being formed inside one of the support arms, the fork is provided in the accommodation space and includes a first fork arm and a second fork arm, the first fork arm is located above the second fork arm, and the forward movement drive mechanism includes a first drive assembly and a second drive assembly, the first drive assembly and the second drive assembly are provided one on top of the other in the first mounting space and are respectively connected to the first fork arm and the second fork arm in a translatable manner and drive the first fork arm and the second fork arm to move along the fore-and-aft direction of the vehicle body.

Description

[Technical Field]

[0001] This application claims priority to Chinese patent application No. 202222640300.9, filed on October 8, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of forklifts, and more particularly to forklifts. [Background technology]

[0003] A forklift is a vehicle that uses forks as a loading device to lift and transport loads to a certain height. Currently, a typical forklift has an interior space for mounting internal components of the forklift. Summary of the Invention [Problem to be solved by the invention]

[0004] The layout of internal components is generally cluttered, resulting in low utilization of the installation space and an increase in the overall size of the forklift. During transportation within the warehouse, a larger aisle space is required to allow for the driving and steering of the large-volume forklift. However, for transportation within the warehouse, an increase in aisle space leads to a decrease in the warehouse capacity, resulting in insufficient utilization of the warehouse's storage space. [Means for solving the problem]

[0005] An object of the present application is to provide a forklift that can reduce the volume of the forklift and improve the warehouse storage rate by improving the utilization rate of the interior space of the forklift.

[0006] To achieve the above object, the present application provides a forklift truck including a vehicle body, a fork, and a forward movement drive mechanism. The vehicle body includes a main body and two support arms. The main body has two opposite ends. The two support arms are respectively provided at the two ends of the main body and extend toward the rear of the vehicle body. The two support arms are provided opposite each other and form a storage space together with the main body, with a first mounting space formed inside one of the support arms. The fork is provided in the storage space and includes a first fork arm and a second fork arm, the first fork arm being positioned above the second fork arm. The forward movement drive mechanism includes a first drive assembly and a second drive assembly. The first drive assembly and the second drive assembly are provided one above the other in the first mounting space and are operably connected to the first fork arm and the second fork arm, respectively, and are configured to drive the first fork arm and the second fork arm to move along the fore-and-aft direction of the vehicle body.

[0007] In one embodiment of the present application, the forklift further includes an upper mast and a lower mast, the upper mast is provided in the storage space and connected to a movable end of the first drive assembly, and is moved along the front-rear direction of the vehicle body by being driven by the first drive assembly; the first fork arm is provided on the upper mast so as to be able to rise and fall; The lower mast is provided in the storage space and located below the upper mast. The lower mast is connected to a movable end of the second drive assembly and moves in the fore-and-aft direction of the vehicle body by being driven by the second drive assembly. The second fork arm is mounted on the lower mast so as to be able to rise and fall.

[0008] In one embodiment of the present application, a first pulley is provided on a side of the upper mast facing the support arm, a first slide groove is recessed on a side of the support arm facing the upper mast, an end face of the first pulley is attached to a bottom wall of the first slide groove, and the first pulley is slidable along a side wall of the first slide groove, a second pulley is provided on the side of the lower mast facing the support arm, a second slide groove is recessed on the side of the support arm facing the lower mast, the second slide groove is located below the first slide groove, an end face of the second pulley is attached to a bottom wall of the second slide groove, and the second pulley is slidable along a side wall of the second slide groove; The first mounting space extends from the main body portion toward inner ends of the first slide groove and the second slide groove.

[0009] In one embodiment of the present application, a second mounting space is formed in the main body portion, and the second mounting space is provided in communication with the first mounting space, The forklift further includes a power mechanism, the power mechanism being disposed within the second mounting space and providing power to the first drive assembly and the second drive assembly.

[0010] In one embodiment of the present application, the first drive assembly is a first hydraulic cylinder, a movable end of which is connected to the upper mast, and the second drive assembly is a second hydraulic cylinder, a movable end of which is connected to the lower mast; The power mechanism includes: a hydraulic pump, the hydraulic pump being provided on a side of the second mounting space closer to the first mounting space, and hydraulic oil pipes being connected between the first drive assembly and the hydraulic pump, and between the second drive assembly and the hydraulic pump; a hydraulic oil tank provided on a side of the second mounting space away from the first mounting space, facing the hydraulic pump, with a hydraulic oil pipe connected between the hydraulic pump and the hydraulic oil tank; a battery provided in the second mounting space and electrically connected to the hydraulic pump.

[0011] In one embodiment of the present application, the forklift comprises: a steering wheel provided at the bottom of the main body; a travel motor provided in the second mounting space and configured to control the rotation of the steering wheel; a steering motor provided in the second mounting space and configured to control the steering of the steering wheel, The traction motor and the steering motor are each operatively connected to a steering wheel, and are each electrically connected to the battery.

[0012] In one embodiment of the present application, the battery, the travel motor, and the steering motor are stacked from top to bottom between the hydraulic pump and the hydraulic oil tank.

[0013] In one embodiment of the present application, a third mounting space is formed inside the support arm away from the forward movement drive mechanism, and the third mounting space is in communication with the second mounting space, The forklift a third hydraulic cylinder provided on the upper mast and configured to drive the first fork arm to move up and down along the upper mast; a first hydraulic oil pipe that is provided to penetrate the third mounting space and has both ends connected to the third hydraulic cylinder and the hydraulic pump, respectively; a fourth hydraulic cylinder provided on the lower mast and configured to drive the second fork arm to move up and down along the lower mast; The hydraulic pump further includes a second hydraulic oil pipe that penetrates the third mounting space and has both ends connected to the fourth hydraulic cylinder and the hydraulic pump, respectively.

[0014] In one embodiment of the present application, the upper mast is Upper outer mast and an upper inner mast, the upper inner mast being provided inside the upper outer mast so as to be able to rise and fall, the first fork arm being provided inside the upper inner mast, the third hydraulic cylinder is provided on the upper outer mast, and a movable end of the third hydraulic cylinder is connected to the upper inner mast to drive the upper inner mast to raise and lower it relative to the upper outer mast; The lower mast is Lower outer mast and a lower inner mast, the lower inner mast being provided inside the lower outer mast so as to be able to rise and fall, the second fork arm being provided inside the lower inner mast, The fourth hydraulic cylinder is provided on the lower outer mast, and a movable end of the fourth hydraulic cylinder is connected to the lower inner mast to drive the lower inner mast to raise and lower it relative to the lower outer mast.

[0015] In one embodiment of the present application, the forklift comprises: a first sensing module provided on the upper mast for detecting obstacles outside the vehicle body and identifying cargo; a first conducting wire that penetrates the third mounting space, is fixed to the outside of the first hydraulic oil pipe, and has both ends connected to the first sensing module and the battery, respectively; a second sensing module mounted on the lower mast for detecting obstacles outside the vehicle body and identifying cargo; The hydraulic fluid supply system further includes a second lead wire that penetrates the third mounting space, is fixed to the outside of the second hydraulic fluid pipe, and has both ends connected to the second sensing module and the battery, respectively. [Effects of the Invention]

[0016] A forklift according to the technical means of the present application includes a vehicle body, a fork, and a forward movement drive mechanism, the vehicle body including a main body and two support arms, the main body forming a storage space together with the two support arms, a first mounting space formed inside one of the support arms, the first mounting space being located inside the main body, a first through-hole formed in the surface of the main body connecting the first mounting space and the storage space, and a first drive assembly and a second drive assembly extending from the first mounting space through the first through-hole, thereby driving the first fork arm and the second fork arm located in the storage space, respectively, to move along the fore-and-aft direction of the vehicle body. The first drive assembly and the second drive assembly are arranged one on top of the other, and the first drive assembly is located above the second drive assembly. In this method, the first drive assembly and the second drive assembly are arranged on the same side, which effectively reduces the width of the vehicle body and improves the utilization rate of the interior space of the vehicle body. This reduces the installation space required for arranging the first drive assembly and the second drive assembly in the conventional design, reduces the volume of the forklift, and the forklift with reduced volume can fit into narrower aisle spaces, improving the warehouse storage rate.

[0017] In order to more clearly explain the technical aspects of the embodiments of the present application or the prior art, the following briefly introduces drawings necessary for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the structures shown in these drawings without any creative work. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a cross-sectional view of a forklift according to the present application. [Figure 2] 1 is a structural schematic diagram of a forklift according to an embodiment of the present application. [Figure 3] 1 is a structural schematic diagram of a forklift according to an embodiment of the present application. [Figure 4] 1 is a structural schematic diagram of a forklift according to an embodiment of the present application.

[0019] The realization of the object, the functional features and advantages of the present application will be further explained in combination with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, the technical means in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, but it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without any creative work fall within the scope of protection of the present application.

[0021] In addition, when directional indications (e.g., up, down, left, right, front, back, etc.) are used in the embodiments of the present application, they are only used to explain the relative positional relationships and movement conditions between each part in a specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0022] In this application, unless otherwise clearly specified or limited, the terms "connected," "fixed," etc. should be understood in a broad sense. For example, "fixed" may mean a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate substrate, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0023] Furthermore, in this application, descriptions such as "first," "second," etc., are used for illustrative purposes only and should not be understood as indicating or implying a relative importance or the number of technical features described. Accordingly, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. Furthermore, "and / or" in the entire text means including three parallel alternatives. For example, "A and / or B" includes alternatives A, B, or both A and B. Furthermore, the technical features of each embodiment may be combined with each other, but this must be based on what a person skilled in the art can achieve. If a combination of technical features is inconsistent or impossible to achieve, such a combination of technical features does not exist and is not within the scope of protection of the application.

[0024] As shown in FIGS. 1 to 4, the present application provides a forklift 100 including a vehicle body 10, a fork 20, and a forward movement drive mechanism 30. The vehicle body 10 includes a main body 11 and two support arms 12. The main body 11 has two opposite ends. The two support arms 12 are respectively provided at the two ends of the main body 11 and extend toward the rear of the vehicle body 10. The two support arms 12 are provided opposite each other and form a storage space 13 together with the main body 11. A first mounting space 111 is formed inside one of the support arms 12. The fork 20 is provided in the storage space 13 and includes a first fork arm 21 and a second fork arm 22. The first fork arm 21 is located above the second fork arm 22. The forward movement drive mechanism 30 includes a first drive assembly 31 and a second drive assembly 32, which are stacked in the first mounting space 111 and are operably connected to the first fork arm 21 and the second fork arm 22, respectively, and are configured to drive the first fork arm 21 and the second fork arm 22 to move along the fore-and-aft direction of the vehicle body 10.

[0025] A forklift 100 according to the technical means of the present application includes a vehicle body 10, a fork 20, and a forward movement drive mechanism 30. The vehicle body 10 includes a main body 11 and two support arms 12. The main body 11, together with the two support arms 12, forms a storage space 13. A first mounting space 111 is formed inside one of the support arms 12. The first mounting space 111 is located inside the main body 11. A first through-hole 114 is formed in the surface of the main body 11, connecting the first mounting space 111 and the storage space 13. The first drive assembly 31 and the second drive assembly 32 extend from the first mounting space 111 through the first through-hole 114, thereby driving the first fork arm 21 and the second fork arm 22 located in the storage space 13, respectively, to move the vehicle body 10 in the fore-and-aft direction. The first drive assembly 31 and the second drive assembly 32 are arranged one on top of the other, and the first drive assembly 31 is located above the second drive assembly 32. In this method, by arranging the first drive assembly 31 and the second drive assembly 32 on the same side, the width of the vehicle body 10 can be effectively reduced and the utilization rate of the interior space of the vehicle body 10 can be improved. This reduces the installation space required for arranging the first drive assembly 31 and the second drive assembly 32 in the conventional design, reduces the volume of the forklift 100, and the reduced-volume forklift 100 can fit into narrower aisle spaces, improving warehouse storage rate.

[0026] The body 10 further includes an upper mast 40 and a lower mast 50, and the first fork arm 21 and the second fork arm 22 can be raised and lowered along the upper mast 40 and the lower mast 50, respectively. The first drive assembly 31 and the second drive assembly 32 may be an air cylinder, a hydraulic cylinder, or a motor, and the type and structure of the first drive assembly 31 and the second drive assembly 32 are not limited here.

[0027] Due to the structure of the body 10 consisting of the main body 11 and two support arms 12, the forklift 100 can transport cargo by extending the forks 20 from the storage space 13 during loading and unloading, and by retracting the forks 20 into the storage space 13 during transportation, the length of the body 10 can be effectively reduced, reducing the volume of the forklift 100. The reduced-volume forklift 100 can fit into narrower aisle spaces, improving warehouse storage rates.

[0028] 1 to 4, in one embodiment of the present application, the forklift 100 further includes an upper mast 40 and a lower mast 50. The upper mast 40 is provided in the storage space 13, connected to a movable end of the first drive assembly 31, and moved in the fore-and-aft direction of the vehicle body 10 by driving the first drive assembly 31, and the first fork arm 21 is provided on the upper mast 40 so as to be able to rise and fall. The lower mast 50 is provided in the storage space 13, located below the upper mast 40, connected to a movable end of the second drive assembly 32, and moved in the fore-and-aft direction of the vehicle body 10 by driving the second drive assembly 32, and the second fork arm 22 is provided on the lower mast 50 so as to be able to rise and fall.

[0029] In one embodiment of the technical solution of the present application, the first fork arm 21 can be raised and lowered along the upper mast 40, and the second fork arm 22 can be raised and lowered along the lower mast 50. The movable end of the first drive assembly 31 is connected to the upper mast 40 and drives the upper mast 40 to move in the fore-and-aft direction of the vehicle body 10, and the first fork arm 21 can move in the fore-and-aft direction of the vehicle body 10 along with the upper mast 40.

[0030] The movable end of the second drive assembly 32 is connected to the lower mast 50 and drives the lower mast 50 to move along the fore-and-aft direction of the vehicle body 10, and the second fork arm 22 can move along the fore-and-aft direction of the vehicle body 10 along with the lower mast 50.

[0031] As shown in FIGS. 1 to 4, in one embodiment of the present application, a first pulley 41 is provided on the side of the upper mast 40 facing the support arm 12, a first slide groove 121 is recessed on the side of the support arm 12 facing the upper mast 40, an end face of the first pulley 41 is attached to the bottom wall of the first slide groove 121, and the first pulley 41 is slidable along the side wall of the first slide groove 121, and a second pulley 51 is provided on the side of the lower mast 50 facing the support arm 12. A second slide groove 122 is recessed on the side of the support arm 12 facing the lower mast 50, the second slide groove 122 is located below the first slide groove 121, the end face of the second pulley 51 is affixed to the bottom wall of the second slide groove 122, and the second pulley 51 can slide along the side wall of the second slide groove 122, and the first mounting space 111 extends from the main body 11 toward the inner ends of the first slide groove 121 and the second slide groove 122.

[0032] In one embodiment of the technical solution of the present application, the upper mast 40 is slidably connected to the first sliding groove 121 of the support arm 12 via the first pulley 41, and a first pulley 41 is provided on both sides of the upper mast 40, with the end faces of the first pulleys 41 on both sides of the upper mast 40 attached to the bottom walls of the first sliding groove 121 to support the upper mast 40. At the same time, because the first pulley 41 can slide along the side walls of the first sliding groove 121, the friction force between the upper mast 40 and the support arm 12 is reduced, making it easier for the first driving assembly 31 to drive the upper mast 40 to move in the fore-and-aft direction of the vehicle body 10.

[0033] The lower mast 50 is slidably connected to the second sliding groove 122 of the support arm 12 via the second pulley 51, and a second pulley 51 is provided on each side of the lower mast 50, with the end faces of the second pulleys 51 on each side of the lower mast 50 attached to the bottom walls of the second sliding groove 122 to support the lower mast 50. At the same time, because the second pulley 51 can slide along the side walls of the second sliding groove 122, the friction between the lower mast 50 and the support arm 12 is reduced, making it easier for the second drive assembly 32 to drive the lower mast 50 to move in the fore-and-aft direction of the vehicle body 10.

[0034] As shown in Figures 1 to 4, in one embodiment of the present application, a second mounting space 112 is formed within the main body portion 11, and the second mounting space 112 is provided in communication with the first mounting space 111, and the forklift 100 further includes a power mechanism 60, which is provided within the second mounting space 112 and configured to provide power to the first drive assembly 31 and the second drive assembly 32.

[0035] In the technical solution of one embodiment of the present application, the second mounting space 112 is located on one side of the first mounting space 111, and a power mechanism 60 is mounted in the second mounting space 112 to provide power to the first drive assembly 31 and the second drive assembly 32 in the first mounting space 111. If the first drive assembly 31 and the second drive assembly 32 are air cylinders, the power mechanism 60 is an air compressor; if the first drive assembly 31 and the second drive assembly 32 are hydraulic cylinders, the power mechanism 60 is a hydraulic oil tank 62 and a hydraulic pump; and if the first drive assembly 31 and the second drive assembly 32 are motors, the power mechanism 60 is a battery 63; the type and structure of the power mechanism 60 are not limited here.

[0036] 1 to 4 , in one embodiment of the present application, the first drive assembly 31 is a first hydraulic cylinder, a movable end of which is connected to the upper mast 40, the second drive assembly 32 is a second hydraulic cylinder, a movable end of which is connected to the lower mast 50, and the power mechanism 60 includes a hydraulic pump 61, a hydraulic oil tank 62, and a battery 63. The hydraulic pump 61 is provided on a side of the second mounting space 112 closer to the first mounting space 111, and hydraulic oil pipes are connected between the first drive assembly 31 and the hydraulic pump 61 and between the second drive assembly 32 and the hydraulic pump 61. The hydraulic oil tank 62 is provided on a side of the second mounting space 112 farther from the first mounting space 111, facing the hydraulic pump 61, and hydraulic oil pipes are connected between the hydraulic pump 61 and the hydraulic oil tank 62. The battery 63 is provided in the second mounting space 112 and is electrically connected to the hydraulic pump 61 .

[0037] In one embodiment of the technical means of the present application, when the first drive assembly 31 and the second drive assembly 32 are hydraulic cylinders, the movable ends of the first drive assembly 31 and the second drive assembly 32 are connected to the upper mast 40 and the lower mast 50, respectively.

[0038] The power mechanism 60 includes a hydraulic oil tank 62, a hydraulic pump 61, and a battery 63, and hydraulic oil pipes are connected between the hydraulic pump 61 and the hydraulic oil tank 62, between the hydraulic pump 61 and the first drive assembly 31, and between the hydraulic pump 61 and the second drive assembly 32. The battery 63 supplies power to the hydraulic pump 61, and the hydraulic pump 61 draws hydraulic oil from the hydraulic oil tank 62 through the hydraulic oil pipes and further pumps the hydraulic oil to the first drive assembly 31 and the second drive assembly 32 through the hydraulic oil pipes, thereby moving the movable ends of the first drive assembly 31 and the second drive assembly 32 in the fore-and-aft direction of the vehicle body 10, thereby driving the upper mast 40, the first fork arm 21, the lower mast 50, and the second fork arm 22 to move in the fore-and-aft direction of the vehicle body 10.

[0039] As shown in Figures 1 to 4, in one embodiment of the present application, the forklift 100 further includes a steering wheel 70 provided at the bottom of the main body 11, a travel motor 71 provided in the second mounting space 112 and controlling the rotation of the steering wheel 70, and a steering motor 72 provided in the second mounting space 112 and controlling the steering of the steering wheel 70, and the travel motor 71 and the steering motor 72 are each connected to the steering wheel 70 in a manner that allows power to be transmitted, and are each electrically connected to the battery 63.

[0040] In one embodiment of the technical means of the present application, the steering wheel 70 is an upright steering wheel 70, the travel motor 71 and the steering motor 72 are each connected to the steering wheel 70 in a manner that allows transmission of power, and a plurality of transmission members are provided between the travel motor 71 and the steering wheel 70 and between the steering motor 72 and the steering wheel 70, and the output shaft of the travel motor 71 controls the rotation speed of the steering wheel 70 by controlling its rotation speed, thereby controlling the forward speed of the vehicle body 10, and the output shaft of the steering motor 72 controls the direction of the steering wheel 70 by rotating, thereby controlling the forward direction of the vehicle body 10.

[0041] In addition to the steering wheel 70, the vehicle body 10 is further provided with support wheels that are provided at one end of the two support arms 12 away from the main body portion 11 and that provide auxiliary support for the vehicle body 10.

[0042] As shown in FIGS. 1 to 4, in one embodiment of the present application, the battery 63, the travel motor 71, and the steering motor 72 are stacked from top to bottom between the hydraulic pump 61 and the hydraulic oil tank 62.

[0043] In one embodiment of the technical solution of the present application, the steering wheel 70 is located in the middle of the chassis. To further optimize the internal structure of the body 10, the battery 63, the traction motor 71, and the steering motor 72 are stacked from top to bottom in the middle of the second mounting space 112, i.e., located between the hydraulic oil tank 62 and the hydraulic pump 61. This maximizes the use of the internal space of the body 10, reduces the width of the body 10, reduces the volume of the forklift 100, and improves the storage capacity of the warehouse.

[0044] 1 to 4 , in one embodiment of the present application, a third mounting space 113 is formed inside the support arm 12 away from the forward movement drive mechanism 30, and the third mounting space 113 is in communication with the second mounting space 112. The forklift 100 further includes a third hydraulic cylinder 81, a first hydraulic oil pipe 82, a fourth hydraulic cylinder 83, and a second hydraulic oil pipe 84. The third hydraulic cylinder 81 is provided on the upper mast 40 and configured to drive the first fork arm 21 to move up and down along the upper mast 40. The first hydraulic oil pipe 82 is provided to penetrate the third mounting space 113, and both ends of the first hydraulic oil pipe 82 are connected to the third hydraulic cylinder 81 and the hydraulic pump 61, respectively. The fourth hydraulic cylinder 83 is provided on the lower mast 50 and configured to drive the second fork arm 22 to move up and down along the lower mast 50. A second hydraulic oil pipe 84 is provided to penetrate the third mounting space 113, and both ends of the second hydraulic oil pipe 84 are connected to the fourth hydraulic cylinder 83 and the hydraulic pump 61, respectively.

[0045] In one embodiment of the technical solution of the present application, the first fork arm 21 and the second fork arm 22 are respectively mounted on the upper mast 40 and the lower mast 50 so as to be able to move up and down.

[0046] A third hydraulic cylinder 81 is provided on the upper mast 40 to drive the first fork arm 21 to move up and down along the upper mast 40. A movable end of the third hydraulic cylinder 81 is connected to the first fork arm 21 to move up and down the first fork arm 21, and the third hydraulic cylinder 81 is connected to the hydraulic pump 61 via a first hydraulic oil pipe 82, allowing the power mechanism 60 to provide power to the third hydraulic cylinder 81. A fourth hydraulic cylinder 83 is provided on the lower mast 50 to drive the second fork arm 22 to move up and down along the lower mast 50. A movable end of the fourth hydraulic cylinder 83 is connected to the second fork arm 22 to move up and down the second fork arm 22, and the fourth hydraulic cylinder 83 is connected to the hydraulic pump 61 via a second hydraulic oil pipe 84, allowing the power mechanism 60 to provide power to the fourth hydraulic cylinder 83.

[0047] A third mounting space 113 is formed inside the other support arm 12, and the third mounting space 113 is located inside the main body 11. A second through hole 115 is formed on the surface of the main body 11, connecting the third mounting space 113 to the accommodating space 13. The first through hole 114 and the second through hole 115 are located at both ends of the main body 11, respectively. The first hydraulic oil pipe 82 and the second hydraulic oil pipe 84 extend from the third mounting space 113 through the second through hole 115, thereby connecting the hydraulic pump 61 to the third hydraulic cylinder 81 and the fourth hydraulic cylinder 83, respectively. By regularly arranging the first hydraulic oil pipe 82 and the second hydraulic oil pipe 84, the width of the vehicle body 10 can be effectively reduced and the utilization rate of the interior space of the vehicle body 10 can be improved. As a result, the installation space required for arranging the first hydraulic oil pipe 82 and the second hydraulic oil pipe 84 in the conventional design can be reduced, and the volume of the forklift 100 can be reduced. The reduced-volume forklift 100 can fit into narrower aisle spaces, improving warehouse storage capacity.

[0048] As shown in Figures 1 to 4, in one embodiment of the present application, the upper mast 40 includes an upper outer mast 42 and an upper inner mast 43, the upper inner mast 43 is arranged inside the upper outer mast 42 so as to be able to rise and fall, the first fork arm 21 is arranged inside the upper inner mast 43, the third hydraulic cylinder 81 is arranged on the upper outer mast 42, and the movable end of the third hydraulic cylinder 81 is connected to the upper inner mast 43 to drive the upper inner mast 43 to rise and fall relative to the upper outer mast 42. The lower mast 50 includes a lower outer mast 52 and a lower inner mast 53, the lower inner mast 53 is arranged inside the lower outer mast 52 so as to be able to rise and fall, the second fork arm 22 is arranged inside the lower inner mast 53, the fourth hydraulic cylinder 83 is arranged on the lower outer mast 52, and the movable end of the fourth hydraulic cylinder 83 is connected to the lower inner mast 53 to drive the lower inner mast 53 to rise and fall relative to the lower outer mast 52.

[0049] In one embodiment of the technical means of the present application, the third hydraulic cylinder 81 is fixed to the upper outer mast 42, and the movable end of the third hydraulic cylinder 81 is connected to the upper inner mast 43 to drive the upper inner mast 43 to move up and down, thereby driving the first fork arm 21 connected to the upper inner mast 43 to move up and down.

[0050] The fourth hydraulic cylinder 83 is fixed to the lower outer mast 52, and the movable end of the fourth hydraulic cylinder 83 is connected to the lower inner mast 53 to drive the lower inner mast 53 to raise and lower it, thereby driving the second fork arm 22 connected to the lower inner mast 53 to raise and lower it.

[0051] As shown in FIGS. 1 to 4 , in one embodiment of the present application, the forklift 100 further includes a first sensing module, a first conducting wire, a second sensing module, and a second conducting wire. The first sensing module is provided on the upper mast 40 and configured to detect obstacles outside the vehicle body 10 and identify cargo. The first conducting wire penetrates the third mounting space 113 and is fixed to the outside of the first hydraulic oil pipe 82, and both ends of the first conducting wire are connected to the first sensing module and the battery 63, respectively. The second sensing module is provided on the lower mast 50 and configured to detect obstacles outside the vehicle body 10 and identify cargo. The second conducting wire penetrates the third mounting space 113 and is fixed to the outside of the second hydraulic oil pipe 84, and both ends of the second conducting wire are connected to the second sensing module and the battery 63, respectively.

[0052] In one embodiment of the technical solution of the present application, the first and second sensing modules may be photoelectric switches that detect obstacles in front of the upper mast 40 and the lower mast 50, obstacle avoidance radars that detect obstacles in front of the upper mast 40 and the lower mast 50, or obstacle avoidance cameras that identify cargo in front of the upper mast 40 and the lower mast 50, and the types and structures of the first and second sensing modules are not limited here.

[0053] The first conducting wire and the second conducting wire are respectively drawn out from the third mounting space 113 through the second through hole 115, and in order to avoid entanglement or interference between the first conducting wire and the second conducting wire, the first conducting wire and the second conducting wire are fixed to the outside of the first hydraulic oil pipe 82 and the second hydraulic oil pipe 84 respectively through fixing members, thereby optimizing the wiring method of the first conducting wire and the second conducting wire.

[0054] The width of the vehicle body 10 can be effectively reduced, and the utilization rate of the interior space of the vehicle body 10 can be improved, thereby reducing the installation space required for arranging the first and second conducting wires in the conventional design, reducing the volume of the forklift 100, and the forklift 100 with reduced volume can fit into narrower aisle spaces, improving warehouse storage rate.

[0055] The above is merely an example of the present application and does not limit the scope of the patent of the present application. In the application concept of the present application, any equivalent structural transformation made by utilizing the contents of the specification and drawings of the present application, or any direct or indirect application to other related technical fields, is included in the scope of patent protection of the present application.

Claims

1. A forklift including a vehicle body, a fork, and a forward movement drive mechanism, The vehicle body includes a main body portion and two support arms, the main body portion having two opposite end portions, the two support arms being respectively provided at the two end portions of the main body portion and extending toward the rear of the vehicle body, the two support arms being provided opposite each other and forming an accommodation space together with the main body portion, and a first mounting space being formed inside one of the support arms, The fork is provided in the accommodation space and includes a first fork arm and a second fork arm, the first fork arm being positioned above the second fork arm, the forward movement drive mechanism includes a first drive assembly and a second drive assembly, the first drive assembly and the second drive assembly being stacked in the first mounting space, being operably connected to the first fork arm and the second fork arm, respectively, and being configured to drive the first fork arm and the second fork arm to move along the fore-and-aft direction of the vehicle body.

2. The forklift further includes an upper mast and a lower mast, the upper mast is provided in the storage space and connected to a movable end of the first drive assembly, and is moved in the front-to-rear direction of the vehicle body by being driven by the first drive assembly; the first fork arm is provided on the upper mast so as to be able to rise and fall; 2. The forklift according to claim 1, wherein the lower mast is provided in the storage space and located below the upper mast, and is connected to a movable end of the second drive assembly so as to move in the fore-and-aft direction of the vehicle body by being driven by the second drive assembly, and the second fork arm is provided on the lower mast so as to be able to rise and fall.

3. a first pulley is provided on the upper mast on a side facing the support arm, a first slide groove is formed on the support arm on a side facing the upper mast, an end face of the first pulley is attached to a bottom wall of the first slide groove, and the first pulley is slidable along a side wall of the first slide groove; a second pulley is provided on the side of the lower mast facing the support arm, a second slide groove is recessed on the side of the support arm facing the lower mast, the second slide groove is located below the first slide groove, an end face of the second pulley is attached to a bottom wall of the second slide groove, and the second pulley is slidable along a side wall of the second slide groove; The forklift according to claim 2 , wherein the first mounting space extends from the main body portion toward inner ends of the first slide groove and the second slide groove.

4. a second mounting space is formed within the main body portion, and the second mounting space is provided in communication with the first mounting space; The forklift according to claim 2 , further comprising a power mechanism, the power mechanism being provided in the second mounting space and providing power to the first drive assembly and the second drive assembly.

5. the first drive assembly is a first hydraulic cylinder, the movable end of which is connected to the upper mast; the second drive assembly is a second hydraulic cylinder, the movable end of which is connected to the lower mast; The power mechanism includes: a hydraulic pump, the hydraulic pump being provided on a side of the second mounting space closer to the first mounting space, and hydraulic oil pipes being connected between the first drive assembly and the hydraulic pump, and between the second drive assembly and the hydraulic pump; a hydraulic oil tank provided on a side of the second mounting space away from the first mounting space, facing the hydraulic pump, with a hydraulic oil pipe connected between the hydraulic pump and the hydraulic oil tank; The forklift according to claim 4 , further comprising: a battery provided in the second mounting space and electrically connected to the hydraulic pump.

6. The forklift a steering wheel provided at the bottom of the main body; a travel motor provided in the second mounting space and configured to control the rotation of the steering wheel; a steering motor provided in the second mounting space and configured to control the steering of the steering wheel, 6. The forklift according to claim 5, wherein the travel motor and the steering motor are each operatively connected to a steering wheel and electrically connected to the battery.

7. 7. The forklift according to claim 6, wherein the battery, the travel motor, and the steering motor are stacked from top to bottom between the hydraulic pump and the hydraulic oil tank.

8. a third mounting space is formed inside the support arm away from the forward movement drive mechanism, and the third mounting space is in communication with the second mounting space; The forklift a third hydraulic cylinder provided on the upper mast and configured to drive the first fork arm to move up and down along the upper mast; a first hydraulic oil pipe that is provided to penetrate the third mounting space and has both ends connected to the third hydraulic cylinder and the hydraulic pump, respectively; a fourth hydraulic cylinder provided on the lower mast and configured to drive the second fork arm to move up and down along the lower mast; 6. The forklift according to claim 5, further comprising: a second hydraulic oil pipe extending through the third mounting space, the second hydraulic oil pipe having both ends connected to the fourth hydraulic cylinder and the hydraulic pump, respectively.

9. The upper mast is Upper outer mast and an upper inner mast, the upper inner mast being provided inside the upper outer mast so as to be able to rise and fall, the first fork arm being provided inside the upper inner mast, the third hydraulic cylinder is provided on the upper outer mast, and a movable end of the third hydraulic cylinder is connected to the upper inner mast to drive the upper inner mast to raise and lower it relative to the upper outer mast; The lower mast is Lower outer mast and a lower inner mast, the lower inner mast being provided inside the lower outer mast so as to be able to rise and fall, the second fork arm being provided inside the lower inner mast, 9. The forklift according to claim 8, wherein the fourth hydraulic cylinder is provided on the lower outer mast, and a movable end of the fourth hydraulic cylinder is connected to the lower inner mast to drive the lower inner mast to raise and lower it relative to the lower outer mast.

10. The forklift a first sensing module provided on the upper mast for detecting obstacles outside the vehicle body and identifying cargo; a first conducting wire that penetrates the third mounting space, is fixed to the outside of the first hydraulic oil pipe, and has both ends connected to the first sensing module and the battery, respectively; a second sensing module mounted on the lower mast for detecting obstacles outside the vehicle body and identifying cargo; 9. The forklift according to claim 8, further comprising: a second conducting wire that penetrates the third mounting space, is fixed to the outside of the second hydraulic oil pipe, and has both ends connected to the second sensing module and the battery, respectively.

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