Material carrying vehicle

Abstract

The invention relates to a material carrying vehicle which is used for being compatible with the feeding and discharging processes of different heat treatment furnaces and is composed of a chassis mechanism (1), a multi-dimensional posture adjusting mechanism (2), a pallet fork butt joint mechanism (3) and a lifting mechanism (4). By flexibly applying a mature and stable mechanical mechanism, multiple functions such as the omni-directional moving Mecanum wheel technology, the trapezoidal lead screw driving technology, the worm and gear driving technology and the motor driving technology are combined together, the feeding and discharging problems of an existing heat treatment furnace are solved through one material carrying vehicle, and the feeding and discharging problems of heat treatment furnaces of different models are effectively solved; the labor intensity of workers is relieved, the material feeding and discharging efficiency is improved, the material waiting time of the heat treatment furnace is shortened, the equipment utilization rate is improved, and unnecessary energy loss is reduced.

Description

Technical Field

[0001] The invention belongs to the field of automatic material transportation, and more specifically, relates to a material transport vehicle mechanism for a heat treatment furnace. Background Art

[0002] Heat treatment furnace is an important equipment for heat treatment of parts. Only after heat treatment can the strength of parts meet the requirements.

[0003] At present, workers use hand-pushed forklifts to load and unload materials to the heat treatment furnace. Due to the different shapes of heat treatment furnaces with different functions, the corresponding hand trucks for loading and unloading are different in shape and cannot be used interchangeably. In addition, materials need to flow between different heat treatment furnaces, so materials need to be transferred between different hand-pushed forklifts, and even need to be handled by aerial vehicles or manual transportation. This further increases the difficulty of work, resulting in low material flow efficiency, high labor intensity for workers, and safety hazards.

[0004] Therefore, it is necessary to design a material handling vehicle that is compatible with loading and unloading of different heat treatment furnaces to improve logistics handling efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and propose a material handling vehicle. The vehicle has the function of being compatible with the material handling of different heat treatment furnaces, ensuring accurate and efficient material handling, reducing the labor intensity of workers and improving production efficiency.

[0006] The technical solution of the present invention is:

[0007] A material handling vehicle, used for loading and unloading processes compatible with different heat treatment furnaces, is composed of: 1 chassis mechanism, 2 multi-dimensional posture adjustment mechanism, 3 fork docking mechanism and 4 lifting mechanism;

[0008] Wherein, 1 chassis mechanism comprises 11 chassis beam, 12 Mecanum wheel, 13 shell, 1 chassis mechanism adopts Mecanum wheel 12, 12 Mecanum wheel is connected to 11 chassis beam by screws, and shell 13 is connected to 11 chassis beam by screws;

[0009] 2 The multi-dimensional posture adjustment mechanism includes 21 a rotation posture adjustment mechanism, 22 a transverse posture adjustment mechanism, and 23 a lifting mechanism. The 21 rotation posture adjustment mechanism is fixed to the upper part of the chassis beam 11 by screws, the 22 transverse posture adjustment mechanism is fixed to the upper part of the 21 rotation posture adjustment mechanism by screws, and the 23 lifting mechanism is fixed to the upper part of the 22 transverse posture adjustment mechanism by screws. The 21 rotation posture adjustment mechanism, the 22 transverse posture adjustment mechanism, and the 23 lifting mechanism respectively perform rotation adjustment, transverse adjustment, and lifting adjustment of the 3 fork docking mechanism, so that the 3 fork docking mechanism is aligned with the heat treatment furnace;

[0010] The 21 rotating posture adjustment mechanism includes a 2101 rotating posture adjustment screw, a 2102 rotating posture adjustment motor, a 2103 rotating posture adjustment support rail and a 2104 rotating posture adjustment platform. The 2101 rotating posture adjustment screw, the 2102 rotating posture adjustment motor and the 2103 rotating posture adjustment support rail are respectively fixed to the 11 chassis beam with screws; the 2104 rotating posture adjustment platform is fixed to the 2103 rotating posture adjustment support rail with screws; the 2101 rotating posture adjustment screw drives the 2104 rotating posture adjustment platform to rotate around the center of the 2103 rotating posture adjustment support rail to realize the rotating posture adjustment function;

[0011] The 22 transverse attitude adjustment mechanism includes a 2201 transverse attitude adjustment screw rod, a 2202 transverse attitude adjustment motor, a 2203 transverse attitude adjustment support guide rail and a 2204 transverse attitude adjustment platform. The 2201 transverse attitude adjustment screw rod, the 2202 transverse attitude adjustment motor and the 2203 transverse attitude adjustment support guide rail are respectively fixed on the top of the 2104 rotating attitude adjustment platform by screws; the 2204 transverse attitude adjustment platform is fixed on the 2203 transverse attitude adjustment support guide rail by screws; the 2202 transverse attitude adjustment motor drives the 2201 transverse attitude adjustment screw rod to drive the 2204 transverse attitude adjustment platform to move transversely along the 2203 transverse attitude adjustment support guide rail, thereby realizing the transverse movement function;

[0012] The lifting mechanism 23 includes a worm gear lift 2301, a transmission shaft 2302, a sprocket 2303 and a lifting motor 2304. There are four worm gear lifts 2301. The lifting motor 2304 is fixed on the top of the lateral displacement and posture adjustment platform 2204 by screws. Two transmission shafts 2302 are connected to the front and rear worm gear lifts 2301 on the left and right sides respectively. The lifting motor 2304 is connected to the sprockets 2303 on the left and right worm gear lifts 2301 by chains. The lifting motor 2304 transmits power to the four worm gear lifts 2301 through the transmission shaft 2302 and the sprocket 2303 to realize the lifting function.

[0013] The 3 fork docking mechanism includes a 31 fork width adjustment mechanism, a 32 telescopic fork mechanism, and a 33 fork support platform. The top of the 2301 worm gear lift is connected to the 33 fork support platform by screws; the 32 telescopic fork mechanism and the 31 fork width adjustment mechanism are connected to the 33 fork support platform by screws, the 32 telescopic fork mechanism is fixed on the 33 fork support platform, and the 31 fork width adjustment mechanism is fixed on the 32 telescopic fork mechanism;

[0014] The 31 fork width adjustment mechanism includes a 3101 width adjustment motor, a 3102 width adjustment screw rod, a 3103 fork adjustment support rail and a 3104 telescopic fork support plate, wherein the 3101 width adjustment motor, the 3102 width adjustment screw rod, the 3103 fork adjustment support rail and the 3104 telescopic fork support plate are fixed to the 32 telescopic fork mechanism by screws, wherein the 3101 width adjustment motor drives the 3102 width adjustment screw rod to drive the 3104 telescopic fork support plate to slide on the 3103 fork adjustment support rail, thereby realizing the fork width adjustment;

[0015] The 32 telescopic fork mechanism includes a 3201 telescopic adjustment motor, a 3202 telescopic adjustment spline shaft, a 3203 telescopic adjustment support rail for a fork and a 3204 telescopic fork. The 3201 telescopic adjustment motor, the 3202 telescopic adjustment spline shaft, the 3203 telescopic adjustment support rail for a fork and the 3204 telescopic fork are fixed to the 33 fork support platform by screw connection. The 3201 telescopic adjustment motor drives the 3202 telescopic adjustment spline shaft to drive the 3204 telescopic fork to slide on the 3203 telescopic adjustment support rail for a fork, thereby realizing the telescopic function of the fork.

[0016] The lifting mechanism comprises a material lifting mechanism moving motor 401, a material lifting mechanism moving pulley 402, a material lifting screw rod 403, a material lifting motor 404, a lifting jaw opening and closing motor 405, a lifting jaw opening and closing screw rod 406, a lifting jaw opening and closing slider 407, a lifting jaw opening and closing swing arm 408, and a lifting mechanism jaw 409. When the material lifting is completed, the lifting mechanism moves away from the lifting area under the drive of the material lifting mechanism moving motor 401, the lifting mechanism is connected to the fork support platform 33 through the material lifting mechanism moving pulley 402, the lifting mechanism jaw 409 is connected to the lifting jaw opening and closing swing arm 408, and the lifting mechanism jaw 409 is connected to the lifting jaw opening and closing swing arm 408. The lifting jaw opening and closing motor is connected to the lifting jaw opening and closing screw rod 406 and drives the lifting jaw opening and closing screw rod 406 to rotate. The lifting jaw opening and closing screw rod 406 is connected to the lifting jaw opening and closing slider 407 and drives the lifting jaw opening and closing slider 407 to move. The lifting jaw opening and closing slider 407 is connected to the lifting jaw opening and closing swing arm 408 and drives the lifting jaw opening and closing swing arm 408 to swing. Therefore, the opening and closing of the lifting mechanism jaw 409 is controlled under the drive of the lifting jaw opening and closing motor 405. The lifting mechanism jaw 409 is lifted and lowered by the material lifting motor 404 driving the material lifting screw rod 403 to drive the lifting mechanism jaw 409 to realize the lifting function.

[0017] The advantages of the present invention are:

[0018] The present invention proposes a material handling vehicle, which flexibly uses a mature and stable mechanical mechanism to combine multiple functions such as omnidirectional mobile Mecanum wheel technology, trapezoidal screw drive technology, worm gear drive technology, and motor drive, so that one material handling vehicle can solve the problem of loading and unloading materials in existing heat treatment furnaces, effectively solve the problem of loading and unloading materials in heat treatment furnaces of different models, reduce the labor intensity of workers, improve the efficiency of material loading and unloading materials, reduce the waiting time of heat treatment furnaces, improve equipment utilization, reduce unnecessary energy loss and other beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Material handling vehicles

[0020] Figure 2 Chassis structure

[0021] Figure 3 Multi-dimensional posture adjustment mechanism

[0022] Figure 4 Rotating posture adjustment mechanism

[0023] Figure 5 Lateral movement and posture adjustment mechanism

[0024] Figure 6 Lifting mechanism

[0025] Figure 7 Fork docking mechanism 1

[0026] Figure 8 Fork docking mechanism 2

[0027] Fig. 9 Sliding fork

[0028] Fig.10 Fork width adjustment mechanism

[0029] Fig.11 Fork telescopic adjustment mechanism

[0030] Fig.12 Material lifting mechanism

[0031] Fig.13 Material lifting mechanism composition

[0032] Fig.14 Material transfer process simulation DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0034] The present invention proposes a material handling vehicle, which is used to solve the problems existing in the loading and unloading process of a heat treatment furnace. The vehicle mainly consists of: 1 chassis mechanism, 2 multi-dimensional posture adjustment mechanism, 3 fork docking mechanism and 4 lifting mechanism. Figure 1 shown.

[0035] 1 Chassis structure design

[0036] Due to the limited space, the material handling vehicle needs to have a very high degree of flexibility and mobility. For this purpose, Mecanum wheels are used. The wheels have omnidirectional mobility and are suitable for driving on flat roads with narrow spaces. The Mecanum wheels are connected to the chassis beam 11 by screws. For the sake of aesthetics and the convenience of installing other functional parts, a shell is designed. The shell 13 is connected to the chassis beam 11 by screws. Figure 2 shown.

[0037] 2. Multi-dimensional posture adjustment mechanism

[0038] Since the chassis adopts the Mecanum wheel, the positioning accuracy of the wheel can only reach ±10mm when traveling, while the docking accuracy between the transporter and the heat treatment furnace must be controlled within ±2mm, and the positioning accuracy of the Mecanum wheel cannot meet the requirements. Therefore, the Mecanum wheel can only be used for rough positioning, and a more accurate posture adjustment mechanism is required for fine positioning. Since there is a height difference between different heat treatment furnaces, the posture adjustment mechanism must have a lifting function. Figure 3 As shown, the posture adjustment mechanisms are connected in series, that is, when the bottom posture adjustment mechanism moves, the upper posture adjustment mechanism will also move. The rotation posture adjustment mechanism 21 is fixed to the chassis beam 11 by screws, the lateral posture adjustment mechanism 22 is fixed to the rotation posture adjustment mechanism 21 by screws, and the lifting mechanism 23 is fixed to the lateral posture adjustment mechanism 22 by screws.

[0039] 2.1 Rotational attitude adjustment mechanism

[0040] Since the forks on the transport vehicle need to be parallel to the axis of the heat treatment furnace, a rotating posture adjustment mechanism is required to achieve parallelism of the axis. Figure 4 As shown, the mechanism is based on the chassis beam 11, 2101 rotary attitude adjustment screw, 2102 rotary attitude adjustment motor, 2103 rotary attitude adjustment support rail are respectively fixed on the chassis beam 11 with screws; 2104 rotary attitude adjustment platform is fixed on the 2103 rotary attitude adjustment support rail by screws; 2101 rotary attitude adjustment screw drives 2104 rotary attitude adjustment platform to realize the rotary attitude adjustment function.

[0041] 2.2 Lateral movement and posture adjustment mechanism

[0042] Under the action of the rotary posture adjustment mechanism, the fork on the transport vehicle is parallel to the axis of the heat treatment furnace. In order to make the transport vehicle and the axis of the heat treatment furnace horizontally collinear, a transverse posture adjustment mechanism is required to make the fork on the transport vehicle and the axis of the heat treatment furnace horizontally collinear. Figure 5As shown, the mechanism is composed of a rotating attitude adjustment platform 2104 as the basis, a transverse attitude adjustment screw 2201, a transverse attitude adjustment motor 2202, and a transverse attitude adjustment support rail 2203 which are respectively fixed on the rotating attitude adjustment platform 2104 with screws; the transverse attitude adjustment platform 2204 is fixed on the transverse attitude adjustment support rail 2203 by screws; the transverse attitude adjustment screw 2201 drives the transverse attitude adjustment platform 2204 to realize the transverse movement function.

[0043] 2.3 Lifting mechanism

[0044] Under the action of the lateral posture adjustment mechanism, the fork on the transport vehicle is aligned with the axis of the heat treatment furnace in the horizontal direction. A vertical lifting posture adjustment mechanism is also required to make the fork on the transport vehicle aligned with the axis of the heat treatment furnace in the vertical direction. Figure 6 As shown, the mechanism is composed of a 2204 transverse displacement attitude adjustment platform as a base and a 2301 worm gear lift. A 2304 lift motor is fixed to the 2204 transverse displacement attitude adjustment platform by screws. The 2304 lift motor transmits power to the 2301 worm gear lift through a 2302 transmission shaft and a 2303 sprocket to realize a lifting function.

[0045] 3 Fork docking mechanism

[0046] Under the action of the lifting mechanism, the fork of the transport vehicle is aligned with the docking port of the heat treatment furnace, and a fork docking mechanism 3 is required to dock the fork of the transport vehicle with the axis of the heat treatment furnace. Figure 7 , 8 As shown in Figure 9, the mechanism is based on the worm gear lift 2301 and is connected to the 33 fork support platform by screws; the 31 telescopic fork mechanism and the 32 fork width adjustment mechanism are connected to the 33 fork support platform by screws. Due to the difference in heat treatment, some heat treatment furnaces use the 31 telescopic fork for loading and unloading, while some heat treatment furnaces use the 3301 sliding fork that comes with the furnace for loading and unloading. The roller on the 3301 sliding fork rolls on the channel steel on the 33 fork support platform to realize the movement of the 3301 sliding fork. Therefore, the 33 fork support platform needs to take into account both the 31 telescopic fork mechanism and the 3301 sliding fork mechanism.

[0047] 3.1 Fork width adjustment mechanism

[0048] Since the door widths of different types of heat treatment furnaces are not uniform, the fork width needs to be adjusted to meet the requirements of different door widths. Fig.10 As shown, the width adjustment motor 3101, the width adjustment screw rod 3102, the fork adjustment support rail 3103, and the telescopic fork support plate 3104 are fixed by screws, wherein the width adjustment screw rod 3102 drives the telescopic fork support plate 3104 to slide on the fork adjustment support rail 3103, thereby realizing the fork width adjustment.

[0049] 3.2 Telescopic fork mechanism

[0050] Since some types of heat treatment furnaces require the use of forks to deliver materials into the heat treatment furnace chamber, and the transport vehicle cannot move all the way to the heat treatment furnace, otherwise it will cause collision and damage to the equipment. Therefore, the forks on the transport vehicle use 3204 telescopic forks. Fig.11 As shown, the telescopic fork support plate 3104, the telescopic adjustment motor 3202, the telescopic adjustment spline shaft 3203, the telescopic adjustment support guide rail 3204 of the telescopic fork are connected by screws, and the telescopic adjustment spline shaft 3202 drives the telescopic fork 3204 to slide on the telescopic adjustment support guide rail 3203 of the fork, thereby realizing the telescopic function of the fork.

[0051] 4 Lifting mechanism

[0052] Since the material needs to be lifted when it moves from the 3204 telescopic fork to the 3301 sliding fork, a 4 lifting mechanism is required. In order to avoid interference between the 100 material and the 4 lifting mechanism, the 4 lifting mechanism needs to be moved away from the lifting area under the drive of the 401 material lifting mechanism mobile motor after the 100 material is lifted. Fig.12 As shown, the 4 lifting mechanism is connected to the 33 fork support platform through the 402 material lifting mechanism moving pulley so that the 4 lifting mechanism can move on the 33 fork support platform.

[0053] Due to the limited structural space, before the 100 material is lifted, the 409 lifting mechanism clamp of the 4 material lifting mechanism must be in an open state to tighten the 100 material and then close. Fig.13 As shown, the lifting mechanism clamp 409 is connected to the lifting clamp opening and closing swing arm 408, the lifting clamp opening and closing motor 405 is connected to the lifting clamp opening and closing screw rod 406 and drives the lifting clamp opening and closing screw rod 406 to rotate, the lifting clamp opening and closing screw rod 406 is connected to the lifting clamp opening and closing slider 407 and drives the lifting clamp opening and closing slider 407 to move, and the lifting clamp opening and closing slider 407 is connected to the lifting clamp opening and closing swing arm 408 and drives the lifting clamp opening and closing swing arm 408 to swing, so the lifting mechanism clamp 409 is controlled to open and close under the drive of the lifting clamp opening and closing motor 405. The lifting mechanism clamp 409 is lifted and lowered by the 404 material lifting motor driving the 403 material lifting screw rod to drive the lifting mechanism clamp 409 to realize the lifting function. Each movable part is connected by screws. Specific embodiment 1:

[0055] Since the material handling vehicle can adapt to many types of heat treatment furnace loading and unloading, the following typical forms are proposed to simplify the heat treatment furnace types: 1001 wide furnace chamber heat treatment furnace, 1002 narrow furnace chamber heat treatment furnace, 1003 with 3301 sliding fork heat treatment furnace. 1004 loading and unloading docking station, 1005 material transfer vehicle, 100 materials, such as Fig.14 shown.

[0056] 1) The process of 1005 material transfer vehicle taking 100 materials from 1004 loading and unloading docking station: after receiving the task instruction, 1005 material transfer vehicle controls 1 chassis mechanism to move to the designated position near 1004 loading and unloading docking station driven by 12 Mecanum wheels, controls 3204 telescopic fork to extend to the designated position, controls 2301 worm gear lifter to make 3204 telescopic fork move vertically upward, when 3204 telescopic fork touches 100 materials, it will lift 100 materials and separate them from 1004 loading and unloading docking station, controls 3204 telescopic fork to retract to the designated position, and then 100 materials are transferred to 1005 material transfer vehicle.

[0057] 2) The loading process of the 1005 material transfer vehicle delivering the 100 material into the 1001 wide furnace cavity heat treatment furnace: the 1005 material transfer vehicle is driven by the 12 Mecanum wheels to move to the designated position near the 1001 wide furnace cavity heat treatment furnace, the 3204 telescopic fork is controlled to extend to the designated position, the 2301 worm gear lifter is controlled to make the 3204 telescopic fork move vertically downward, and the loading work is completed when the 100 material contacts the furnace cavity of the 1001 wide furnace cavity heat treatment furnace, and the 3204 telescopic fork is controlled to be retracted to the designated position.

[0058] 3) The unloading process of taking out the 100 material from the 1002 narrow cavity heat treatment furnace by the 1005 material transfer vehicle: the 1005 material transfer vehicle is driven by the 12 Mecanum wheels to move to the designated position near the 1002 narrow cavity heat treatment furnace, the 32 fork width adjustment mechanism is controlled to narrow the distance between the two 3204 telescopic forks, the 3204 telescopic forks are controlled to extend to the designated position, the 2301 worm gear lifter is controlled to move the 3204 telescopic forks vertically upward, when the 3204 telescopic forks touch the 100 material, the 100 material will be lifted and separated from the 1002 narrow cavity heat treatment furnace, the 3204 telescopic forks are controlled to be retracted to the designated position, and the 100 material is transferred to the 1005 material transfer vehicle.

[0059] 4) The material 100 is transferred to the loading process of the 1003 built-in 3301 sliding fork heat treatment furnace by the 1005 material transfer vehicle: the 1005 material transfer vehicle is driven by the 12 Mecanum wheels to move to the designated position near the 1003 built-in 3301 sliding fork heat treatment furnace, and the 2301 worm gear lifter is controlled to make the 33 fork support platform reach the designated position, and the 404 material lifting motor and the 405 lifting jaw opening and closing motor of the 4 material lifting mechanism are controlled to make the 409 lifting mechanism jaw move to the highest position and open the jaw, and the 401 material lifting mechanism moving motor of the 4 material lifting mechanism is controlled to make the 4 material lifting mechanism move to the top of the 100 material, and the 404 material lifting motor and the 405 lifting jaw opening and closing motor are controlled to make the 409 lifting mechanism jaw drop to the designated position and close the jaw, and the 404 material lifting motor is controlled to make the 409 lifting mechanism jaw Lift 100 materials to the designated position. At this time, the 3301 sliding fork is moved from the 1003 built-in 3301 sliding fork heat treatment furnace to the 33 fork support platform. The 404 material lifting motor is controlled to make the 409 lifting mechanism clamp put down 100 materials onto the 3301 sliding fork. The 405 lifting clamp opening and closing motor is controlled to make the 409 lifting mechanism clamp open to the maximum position. The 404 material lifting motor is controlled to make the 409 lifting mechanism clamp return to the highest position to avoid collision with the 100 materials. The 401 material lifting mechanism moving motor is controlled to make the 4 material lifting mechanism move to the end of the 33 fork support platform to avoid the 100 materials. At this time, the 3301 sliding fork is pushed into the 1003 built-in 3301 sliding fork heat treatment furnace to complete the transfer of 100 materials from the 1002 narrow furnace cavity heat treatment furnace to the 1003 built-in 3301 sliding fork heat treatment furnace.

[0060] 5) The unloading process of 1005 material transfer vehicle taking out 100 material from 1003 with its own 3301 sliding fork heat treatment furnace: Taking material from 1003 with its own 3301 sliding fork heat treatment furnace is the reverse process of loading.

[0061] 6) The unloading process of the 1005 material transfer vehicle placing the 100 material on the 1004 loading and unloading docking station: The process of unloading from the 1005 material transfer vehicle to the 1004 loading and unloading docking station is the reverse process of loading.

Claims

1. A material handling vehicle, used for loading and unloading processes of different heat treatment furnaces, comprising: a chassis mechanism (1), a multi-dimensional posture adjustment mechanism (2), a fork docking mechanism (3) and a lifting mechanism (4); in, The chassis mechanism (1) comprises a chassis beam (11), a Mecanum wheel (12), and a housing (13). The chassis mechanism (1) adopts the Mecanum wheel (12), the Mecanum wheel (12) is connected to the chassis beam (11) by screws, and the housing (13) is connected to the chassis beam (11) by screws. The multi-dimensional posture adjustment mechanism (2) comprises a rotation posture adjustment mechanism (21), a transverse posture adjustment mechanism (22), and a lifting mechanism (23). The rotation posture adjustment mechanism (21) is fixed to the upper part of the chassis beam (11) by screws, the transverse posture adjustment mechanism (22) is fixed to the upper part of the rotation posture adjustment mechanism (21) by screws, and the lifting mechanism (23) is fixed to the upper part of the transverse posture adjustment mechanism (22) by screws. The rotation posture adjustment mechanism (21), the transverse posture adjustment mechanism (22), and the lifting mechanism (23) respectively perform rotation adjustment, transverse adjustment, and lifting adjustment of the fork docking mechanism (3), so that the fork docking mechanism (3) is aligned with the heat treatment furnace; The fork docking mechanism (3) comprises a fork width adjustment mechanism (31), a telescopic fork mechanism (32), and a fork support platform (33); the upper portion of the worm gear lift (2301) is connected to the fork support platform (33) by screws; the telescopic fork mechanism (32) and the fork width adjustment mechanism (31) are connected to the fork support platform (33) by screws; the telescopic fork mechanism (32) is fixed to the fork support platform (33), and the fork width adjustment mechanism (31) is fixed to the telescopic fork mechanism (32); The lifting mechanism (4) comprises a material lifting mechanism moving motor (401), a material lifting mechanism moving pulley (402), a material lifting screw rod (403), a material lifting motor (404), a lifting jaw opening and closing motor (405), a lifting jaw opening and closing screw rod (406), a lifting jaw opening and closing slider (407), a lifting jaw opening and closing swing arm (408), and a lifting mechanism jaw (409); after the material lifting is completed, the lifting mechanism (4) moves away from the lifting area under the drive of the material lifting mechanism moving motor (401), the lifting mechanism (4) is connected to the fork support platform (33) through the material lifting mechanism moving pulley (402), and the lifting mechanism jaw (409) is connected to the lifting jaw opening and closing swing arm (408). The lifting jaw opening and closing motor (405) is connected to the lifting jaw opening and closing screw rod (406) and drives the lifting jaw opening and closing screw rod (406) to rotate. The lifting jaw opening and closing screw rod (406) is connected to the lifting jaw opening and closing slider (407) and drives the lifting jaw opening and closing slider (407) to move. The lifting jaw opening and closing slider (407) is connected to the lifting jaw opening and closing swing arm (408) and drives the lifting jaw opening and closing swing arm (408) to swing. Therefore, the lifting mechanism jaw (409) is controlled to open and close under the drive of the lifting jaw opening and closing motor (405). The lifting and lowering of the lifting mechanism jaw (409) is realized by the material lifting motor (404) driving the material lifting screw rod (403) to drive the lifting mechanism jaw (409) to realize the lifting function.

2. A material handling vehicle as claimed in claim 1, characterized in that: The rotary posture adjustment mechanism (21) comprises a rotary posture adjustment screw (2101), a rotary posture adjustment motor (2102), a rotary posture adjustment support rail (2103) and a rotary posture adjustment platform (2104); the rotary posture adjustment screw (2101), the rotary posture adjustment motor (2102) and the rotary posture adjustment support rail (2103) are respectively fixed to the chassis beam (11) by screws; the rotary posture adjustment platform (2104) is fixed to the rotary posture adjustment support rail (2103) by screws; the rotary posture adjustment screw (2101) drives the rotary posture adjustment platform (2104) to rotate around the center of the rotary posture adjustment support rail (2103) to realize the rotary posture adjustment function.

3. A material handling vehicle as claimed in claim 2, characterized in that: The transverse movement and posture adjustment mechanism (22) comprises a transverse movement and posture adjustment screw (2201), a transverse movement and posture adjustment motor (2202), a transverse movement and posture adjustment support rail (2203) and a transverse movement and posture adjustment platform (2204); the transverse movement and posture adjustment screw (2201), the transverse movement and posture adjustment motor (2202) and the transverse movement and posture adjustment support rail (2203) are respectively fixed on the top of the transverse movement and posture adjustment platform (2204) by screws; the transverse movement and posture adjustment platform (2204) is fixed on the transverse movement and posture adjustment support rail (2203) by screws; the transverse movement and posture adjustment motor (2202) drives the transverse movement and posture adjustment screw (2201) to drive the transverse movement and posture adjustment platform (2204) to move transversely along the transverse movement and posture adjustment support rail (2203), thereby realizing a transverse movement function.

4. A material handling vehicle as claimed in claim 3, characterized in that: The lifting mechanism (23) comprises a worm gear lift (2301), a transmission shaft (2302), a sprocket (2303) and a lifting motor (2304). There are four worm gear lifts (2301). The lifting motor (2304) is fixed on the top of the transverse displacement and posture adjustment platform (2204) by screws. Two transmission shafts (2302) are respectively connected to the front and rear worm gear lifts (2301) on the left and right sides. The lifting motor (2304) is connected to the sprockets (2303) on the left and right worm gear lifts (2301) by a chain. The lifting motor (2304) transmits power to the four worm gear lifts (2301) through the transmission shaft (2302) and the sprocket (2303), thereby realizing the lifting function.

5. A material handling vehicle as claimed in claim 4, characterized in that: The fork width adjustment mechanism (31) comprises a width adjustment motor (3101), a width adjustment screw rod (3102), a fork adjustment support guide rail (3103) and a telescopic fork support plate (3104); the width adjustment motor (3101), the width adjustment screw rod (3102), the fork adjustment support guide rail (3103) and the telescopic fork support plate (3104) are fixed to the telescopic fork mechanism (32) by screws, wherein the width adjustment motor (3101) drives the width adjustment screw rod (3102) to drive the telescopic fork support plate (3104) to slide on the fork adjustment support guide rail (3103), thereby realizing fork width adjustment.

6. A material handling vehicle as claimed in claim 5, characterized in that: The telescopic fork mechanism (32) comprises a telescopic adjustment motor (3201), a telescopic adjustment spline shaft (3202), a telescopic adjustment support guide rail for a fork (3203) and a telescopic fork (3204). The telescopic adjustment motor (3201), the telescopic adjustment spline shaft (3202), the telescopic adjustment support guide rail for a fork (3203) and the telescopic fork (3204) are fixed to a fork support platform (33) by screw connection. The telescopic adjustment motor (3201) drives the telescopic adjustment spline shaft (3202) to drive the telescopic fork (3204) to slide on the telescopic adjustment support guide rail for a fork (3203), thereby realizing the telescopic function of the fork.

7. A material handling vehicle as claimed in claim 6, characterized in that: The Mecanum wheel (12) realizes the rough positioning of the docking of the transport vehicle and the heat treatment furnace, and the multi-dimensional posture adjustment mechanism (2) realizes the precise positioning of the docking of the transport vehicle and the heat treatment furnace.

8. A material handling vehicle as claimed in claim 7, characterized in that: The rotary posture adjustment mechanism (21) enables the fork on the transport vehicle to be parallel to the axis of the heat treatment furnace, the transverse posture adjustment mechanism (22) enables the fork on the transport vehicle to be horizontally aligned with the axis of the heat treatment furnace, and the lifting mechanism (23) enables the fork on the transport vehicle to be vertically aligned with the axis of the heat treatment furnace.

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