Frame welding device for electric transport vehicle

Abstract

The present invention provides a frame welding device for an electric transport vehicle, belonging to the technical field of forklift welding, comprising: a base plate, on which a first working plane, a second working plane, a third working plane and a column are arranged, wherein a first positioning portion is arranged on the first working plane, a second positioning portion is arranged on the second working plane, and a third positioning portion and a fourth positioning portion are arranged on the column; a first clamping assembly, a second clamping assembly, a fourth clamping assembly and a fifth clamping assembly are arranged on the base plate, and a third clamping assembly and a sixth clamping assembly are arranged on the column. The present invention accurately realizes the positioning and fixing of various parts in the transport vehicle frame through a fixing structure composed of the first clamping assembly, the second clamping assembly, the third clamping assembly, the fourth clamping assembly, the fifth clamping assembly and the sixth clamping assembly, and a positioning structure composed of the first positioning assembly and the second positioning assembly, thereby improving the quality and efficiency of the transport vehicle frame welding.

Description

Technical Field

[0001] The invention belongs to the technical field of frame welding of electric transport vehicles, and relates to a frame welding device, in particular to a frame welding device of an electric transport vehicle. Background Art

[0002] As an important type of transport truck, the electric transport truck is an upgraded version of the manual transport truck. It usually includes two functions: lifting (lifting items) and transporting with forks. It is widely used in ports, stations, airports, warehouses, circulation centers, distribution centers and other occasions.

[0003] The existing welding tools for electric transport truck frames are mostly simple welding tables that can only provide support. During the welding process, the operator needs to rely on his own experience to align adjacent components, and each time a welding work is completed, it is necessary to realign another welding point, resulting in low welding accuracy and low welding efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to provide a frame welding device which is easy to operate and has accurate positioning.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A frame welding device for an electric transport vehicle, comprising:

[0006] A bottom plate, on which a first working plane for supporting the fork legs on the transport vehicle frame is provided, and a first positioning portion for positioning the fork legs is provided in the first working plane, and a second working plane for supporting the middle gear on the transport vehicle frame is provided, and a second positioning portion for positioning the middle gear is provided in the second working plane, and a third working plane for supporting the middle cross piece on the transport vehicle frame and a column, wherein a third positioning portion for positioning the middle cross piece and a fourth positioning portion for positioning the top cover assembly on the transport vehicle frame are provided on the column;

[0007] A first clamping assembly installed on the bottom plate, through which the fork legs are clamped and limited in the horizontal and vertical directions, wherein the first clamping assembly includes a first linear clamping cylinder for clamping and limiting the fork legs in the horizontal direction, and a first rotary clamping cylinder for clamping and limiting the fork legs in the vertical direction;

[0008] A second clamping assembly installed on the bottom plate, through which the middle cross piece and the front baffle are clamped and limited in the horizontal and vertical directions, wherein the second clamping assembly includes a second clamping structure for clamping and limiting the middle cross piece in the vertical direction, and a third clamping structure for clamping and limiting the middle cross piece in the horizontal direction;

[0009] A third clamping assembly installed on the column, through which the top cover assembly is clamped and limited in the horizontal and vertical directions, wherein the third clamping assembly includes a fourth rotary clamping cylinder for clamping and limiting the top cover assembly in the vertical direction;

[0010] A fourth clamping assembly installed on the bottom plate, through which the support pipe is clamped and limited in the horizontal and vertical directions, wherein the fourth clamping assembly includes a third linear clamping cylinder for clamping and limiting the support pipe in the horizontal direction;

[0011] A fifth clamping assembly installed on the bottom plate, through which the shaft sleeve assembly and the sealing plate are clamped in the horizontal and vertical directions, wherein the fifth clamping assembly includes a fourth linear clamping cylinder for clamping and limiting the shaft sleeve assembly and the sealing plate in the horizontal direction;

[0012] The sixth clamping assembly installed on the column realizes the clamping and limiting of the decorative plate in the horizontal and vertical directions through the sixth clamping assembly, wherein the sixth clamping assembly includes a fifth linear clamping cylinder and a fifth rotary clamping cylinder for realizing the clamping and limiting of the decorative plate in the horizontal and vertical directions.

[0013] In the above-mentioned frame welding device of an electric transport vehicle, a first support plate is used to support a first working plane, and the position of the first support plate corresponds to the position of the first linear clamping cylinder, and the clamping of the fork leg is achieved through the cooperation of the first support plate and the first linear clamping cylinder; a second support plate is used to support a second working plane and a third support plate is used to support a third working plane, wherein the first positioning portion is arranged between the third support plate and the fork leg, and the second positioning portion is arranged between the second support plate and the middle gear.

[0014] In the above-mentioned frame welding device of an electric transport vehicle, the third positioning part includes a first pallet connected to the column and arranged horizontally, and a second pallet connected to the first pallet and arranged horizontally, wherein the first pallet and the second pallet form a stepped arrangement, and the second pallet and the third support plate cooperate to form a third working plane as a support for the middle cross bar, and the first pallet forms a snap-fit ​​fit with the groove on the middle cross bar to position the middle cross bar in the horizontal direction.

[0015] In the above-mentioned frame welding device of an electric transport vehicle, the second clamping structure includes a second rotary clamping cylinder installed on the base plate, and the output end of the second rotary clamping cylinder is rotated and clamped on the middle cross bar; the third clamping structure includes a second linear clamping cylinder installed on the column, and the output end of the second linear clamping cylinder is connected to the middle cross bar fixing plate, wherein the middle cross bar fixing plate is connected to the third rotary clamping cylinder, and the output end of the third rotary clamping cylinder is rotated and clamped on the middle cross bar.

[0016] In the above-mentioned frame welding device of an electric transport vehicle, there are two third linear clamping cylinders installed on the base plate and they are arranged opposite to each other, and there is one fourth rotary clamping cylinder installed on the column, wherein the clamping of both sides of the open end of the support tube is achieved by the two third linear clamping cylinders, and the clamping of the closed end of the support tube is achieved by the fourth rotary clamping cylinder, thereby forming a three-point clamping limit for the support tube in the vertical direction.

[0017] In the above-mentioned frame welding device of an electric transport vehicle, the output end of the third linear clamping cylinder is connected to a support tube fixing seat, wherein the support tube fixing seat includes a first support tube fixing plate and a second support tube fixing plate which are arranged in a superimposed manner, and the first support tube fixing plate is provided with an arc-shaped portion which fits with the support tube, and the clamping and limiting of the support tube and one end of the sealing plate are realized by the first support tube fixing plate.

[0018] In the above-mentioned frame welding device of an electric transport vehicle, the output end of the fourth linear clamping cylinder is connected to a sleeve positioning plate, and a sleeve positioning shaft that is nested with the sleeve in the sleeve assembly is provided on the sleeve positioning plate, and a support plate positioning shaft that is plugged into and matched with the other end of the support plate and the sealing plate in the bearing assembly is provided.

[0019] In the above-mentioned frame welding device of an electric transport vehicle, the output end of the fifth linear clamping cylinder is connected to a decorative panel fixing seat, wherein an insert positioning seat and a fifth rotary clamping cylinder are provided on the decorative panel fixing seat, the decorative panel is positioned by the insert positioning seat, and the clamping and limiting of the decorative panel is achieved by the insert positioning seat and the output end of the fifth rotary clamping cylinder.

[0020] In the above-mentioned frame welding device of an electric transport vehicle, a front baffle positioning seat is also provided on the base plate, and a front baffle positioning block is connected to the front baffle positioning seat, wherein the front baffle is positioned by the front baffle positioning block, and the front baffle is clamped and limited by the second rotary clamping cylinder.

[0021] In the above-mentioned frame welding device of an electric transport vehicle, it also includes an ejection assembly, and the ejection assembly includes a first ejection structure installed on the base plate and a second ejection structure installed on the column, wherein the first ejection structure includes a first ejection cylinder, and the output end of the first ejection cylinder is connected to a first ejection rod, and the first ejection cylinder and the first ejection rod are respectively located on the upper and lower sides of the base plate; the second ejection structure includes a second ejection cylinder, and the output end of the second ejection cylinder is connected to a second ejection rod.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The frame welding device of an electric transport vehicle provided by the present invention can accurately realize the positioning and fixation of various parts of the transport vehicle frame through a fixing structure composed of a first clamping assembly, a second clamping assembly, a third clamping assembly, a fourth clamping assembly, a fifth clamping assembly and a sixth clamping assembly, and a positioning structure composed of a first positioning assembly and a second positioning assembly, thereby improving the quality and efficiency of the transport vehicle frame welding.

[0024] (2) The position of the first linear clamping cylinder is made to correspond to the position of the first support plate because the first support plate supports the end of the left fork or the right fork, so that the first linear clamping cylinder can clamp the end of the left fork or the right fork, and the first linear clamping cylinder and the first support plate cooperate with each other to achieve the clamping of the left fork or the right fork, further improving the clamping limit of the left fork or the right fork in the horizontal direction. In addition, the left fork or the right fork can be fixed in the vertical direction by the first rotary clamping cylinder, and the loading of the left fork or the right fork can also be facilitated.

[0025] (3) By providing the third positioning portion, not only is the middle cross member positioned in the third working plane, but also when the third clamping assembly acts on the top cover assembly, the downward pressure generated can be borne by the third positioning portion, thereby preventing the middle cross member from being deformed under the indirect action of the third clamping assembly, thereby improving the reliability of the middle cross member and the top cover assembly in the vertical direction. In addition, the third positioning portion cooperates with the fourth positioning portion to achieve the positioning of the upper and lower ends of the top cover assembly.

[0026] (4) The arc portion is provided on the first support tube fixing plate in order to increase the contact area between the first support tube fixing plate and the support tube and improve the clamping of the support tube by the two fourth clamping structures. In addition, the U-shaped support tube is buckled on the support foot, wherein the two sides of the open end of the support tube are clamped by the two fourth clamping structures, and the closed end of the support tube is clamped by the third clamping assembly through the top cover assembly, thereby realizing the three-point clamping and limiting of the support tube in the vertical plane.

[0027] (5) The position of the first ejection structure corresponds to the position of the fork leg, and the position of the second ejection structure corresponds to the position of the top cover assembly. When the overall welding of the transporter frame is completed, the first ejection structure and the second ejection structure are synchronously extended to achieve synchronous movement of the fork leg and the top cover assembly in the vertical direction, thereby completing the demolding of the transporter frame, thereby improving the demolding efficiency of the transporter frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a transport vehicle frame in the prior art.

[0029] Figure 2yes Figure 1 A schematic diagram of the structure of the medium transport truck frame from another perspective.

[0030] Figure 3 The present invention is a schematic structural diagram of a frame welding device for an electric transport vehicle.

[0031] Figure 4 yes Figure 3 The structural schematic diagram of the positioning welding tooling from another perspective is shown.

[0032] Figure 5 It is a schematic structural diagram of the present invention when positioning and assembling the fork legs and the mid-range.

[0033] Figure 6 yes Figure 5 Enlarged view of part A.

[0034] Figure 7 It is a structural schematic diagram of the crossbar, top cover assembly and support tube in the positioning assembly of the present invention.

[0035] Figure 8 yes Figure 7 Enlarged view of part B.

[0036] Fig. 9 yes Figure 7 Magnified view of part C.

[0037] Fig.10 It is a structural schematic diagram of the positioning and assembling shaft sleeve assembly and the sealing plate of the present invention.

[0038] Fig.11 yes Fig.10 Magnified view of part D.

[0039] Fig.12 It is a structural schematic diagram of the positioning and assembling of a front baffle and a decorative plate of the present invention.

[0040] Fig.13 yes Fig.12 Enlarged view of part E.

[0041] Fig.14 yes Fig.12 Enlarged view of part F.

[0042] In the figure, 100, a transport vehicle frame; 110, a fork leg; 111, a left fork; 112, a right fork; 113, a notch; 120, a middle gear; 121, a second positioning hole; 130, a middle cross gear; 131, a first vertical plate; 132, a horizontal plate; 133, a second vertical plate; 134, a groove; 140, a support pipe; 150, a top cover assembly; 160, a sleeve assembly; 161, a support plate; 162, a sleeve; 170, a sealing plate; 180, a front baffle; 190, a decorative plate; 200, a bottom plate; 210, a vertical plate Column; 211, first support plate; 212, second support plate; 213, positioning column; 220, first support plate; 221, first step surface; 222, second step surface; 230, second support plate; 231, first positioning hole; 240, third support plate; 241, protrusion; 250, front baffle plate positioning seat; 260, front baffle plate positioning block; 300, first clamping assembly; 310, first linear clamping cylinder; 320, first rotary clamping cylinder; 330, first rotary clamping block; 400, second clamping assembly ; 410, second rotary clamping cylinder; 420, second rotary clamping block; 430, second linear clamping cylinder; 440, middle crossbar fixing block; 450, third rotary clamping cylinder; 460, third rotary clamping block; 500, third clamping assembly; 510, fourth rotary clamping cylinder; 520, fourth rotary clamping block; 600, fourth clamping assembly; 610, vertical plate; 620, third linear clamping cylinder; 630, first support tube fixing plate; 631, arc portion; 640, second support tube fixing plate; 700, the fifth clamping assembly; 710, the fourth linear clamping cylinder; 720, the sleeve positioning plate; 730, the sleeve positioning shaft; 740, the support plate positioning shaft; 800, the sixth clamping assembly; 810, the fifth linear clamping cylinder; 820, the decorative plate fixing seat; 830, the insert positioning seat; 840, the fifth rotary clamping cylinder; 850, the fifth rotary clamping block; 900, the ejection assembly; 910, the first ejection cylinder; 920, the first ejection rod; 930, the second ejection cylinder; 940, the second ejection rod. DETAILED DESCRIPTION

[0043] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] like Figure 1 As shown, it is a frame of a transport vehicle in the prior art, and the transport vehicle frame 100 includes:

[0046] A fork leg 110, wherein the fork leg 110 includes a left fork 111 and a right fork 112 arranged side by side;

[0047] The middle range 120 is located between the left fork 111 and the right fork 112, and the two ends of the middle range 120 are respectively welded to the left fork 111 and the right fork 112;

[0048] The middle cross bar 130 is arranged in a Z shape and spans the left fork 111 and the right fork 112, wherein one side of the middle cross bar 130 is welded to the fork leg 110;

[0049] The support tube 140 is U-shaped, and the two sides of the open end of the support tube 140 are respectively welded to the left fork 111 and the right fork 112, and are also welded to one side of the middle cross member 130 that is welded to the fork leg 110;

[0050] The top cover assembly 150 is L-shaped, and one end of the top cover assembly 150 is welded to the other side of the middle cross member 130, and the other end of the top cover assembly 150 is welded to the closed end of the support tube 140;

[0051] Two supporting plates 161 are respectively located at two ends of the middle cross member 130, wherein two ends of one supporting plate 161 are respectively welded to the middle cross member 130 and the left fork 111, and two ends of the other supporting plate 161 are respectively welded to the middle cross member 130 and the right fork 112, wherein a shaft sleeve 162 is provided on each of the two supporting plates 161, and the axes of the two shaft sleeves 162 coincide with each other, and the supporting plate 161 and the shaft sleeve 162 cooperate to form a shaft sleeve assembly 160;

[0052] Two sealing plates 170 are respectively located at the two ends of the middle cross member 130 and correspond to the position of the shaft sleeve assembly 160, and each sealing plate 170 is used to seal the gap between the side of the middle cross member 130 connected to the top cover assembly 150 and the side of the open end of the support tube 140, wherein a connecting hole is provided on each of the two sealing plates 170, and the position of the connecting hole corresponds to the position of the shaft sleeve 162;

[0053] The front baffle 180 spans the left fork 111 and the right fork 112 and is located at the open end of the support tube 140, wherein two ends of the front baffle 180 are respectively welded to two sides of the open end of the support tube 140;

[0054] The two decorative plates 190 are respectively located on both sides of the top cover assembly 150 , wherein the adjacent two sides of the decorative plate 190 are respectively welded to the closed end of the support tube 140 and the top cover assembly 150 , and a decorative hole is set on each decorative plate 190 .

[0055] like Figures 1 to 14As shown, the present invention provides a frame welding device for an electric transport vehicle, comprising:

[0056] The bottom plate 200 is provided with a first working plane for supporting the fork leg 110, a second working plane for supporting the middle gear 120, and a column 210, and a first positioning portion for positioning the fork leg 110 in the first working plane is provided in the first working plane, and a second positioning portion for positioning the middle gear 120 in the second working plane is provided in the second working plane, wherein the first working plane and the second working plane are on the same plane, and the middle gear 120 is clamped between the left fork 111 and the right fork 112, thereby realizing the relative position between the fork leg 110 and the middle gear 120;

[0057] The first clamping assembly 300 includes two groups of symmetrically arranged first clamping structures, wherein the first clamping structures are used to clamp and limit the fork legs 110 in the vertical and horizontal directions, and the middle gear 120 is clamped between the left fork 111 and the right fork 112, thereby indirectly achieving the clamping and limiting of the middle gear 120 in the second working plane;

[0058] The first positioning assembly includes a third working plane provided on the bottom plate 200 and used to support the middle cross member 130, and a third positioning portion and a fourth positioning portion provided on the column 210, wherein the middle cross member 130 is positioned in the third working plane by the third positioning portion, the top cover assembly 150 is positioned on the middle cross member 130 by the third positioning portion and the fourth positioning portion, and the support tube 140 is positioned by the relative positions among the middle cross member 130, the top cover assembly 150 and the support tube 140;

[0059] The second pressing assembly 400 includes a second pressing structure installed on the bottom plate 200 and a third pressing structure installed on the column 210, wherein the second pressing structure completes the pressing and limiting of the middle cross member 130 in the vertical direction, and the third pressing structure completes the pressing and limiting of the middle cross member 130 in the horizontal direction;

[0060] The third clamping assembly 500 is installed on the column 210, and the top cover assembly 150 is clamped and limited in the vertical direction by the third clamping assembly 500, wherein the top cover assembly 150 is clamped and limited in the horizontal direction due to the snap fit formed between the top cover assembly 150 and the middle cross bar 130;

[0061] The fourth clamping assembly 600 is installed on the bottom plate 200, and the fourth clamping assembly 600 includes two groups of symmetrically arranged fourth clamping structures, wherein the fourth clamping structure completes the clamping and limiting of the support tube 140 in the horizontal direction. Since the two sides of the open end of the support tube 140 are respectively connected to the left fork 111 and the right fork 112, and are clamped and matched with one end of the middle cross member 130, the closed end of the support tube 140 forms an abutment match with the top cover assembly 150 in the vertical direction. Therefore, the clamping and limiting of the support tube 140 in the vertical direction is completed by the third clamping assembly 500 through the top cover assembly 150;

[0062] The fifth clamping assembly 700 is installed on the bottom plate 200, and the fifth clamping assembly 700 includes two groups of fifth clamping structures that are symmetrically arranged, wherein the fifth clamping structure completes the clamping and limiting of the shaft sleeve assembly 160 in the horizontal direction, and since the shaft sleeve assembly 160 is clamped between the fork leg 110 and the middle cross piece 130, the clamping and limiting of the shaft sleeve assembly 160 in the vertical direction is achieved; the fifth clamping structure and the fourth clamping structure realize the clamping and limiting of the sealing plate 170 in the horizontal and vertical directions;

[0063] The second positioning assembly is installed on the bottom plate 200. The front baffle 180 is positioned at the open end of the support tube 140 through the cooperation between the second positioning assembly and the support tube 140, and the front baffle 180 is clamped and limited in the vertical and horizontal directions through the second clamping structure.

[0064] The sixth clamping assembly 800 is installed on the column 210, and the sixth clamping assembly 800 includes two groups of symmetrically arranged sixth clamping structures, wherein the positioning and clamping of the decorative panel 190 are achieved through the sixth clamping structures.

[0065] The present invention provides a positioning welding tool for a transport vehicle frame 100, which accurately realizes the positioning and fixation of various parts in the transport vehicle frame 100 through a fixing structure composed of a first clamping assembly 300, a second clamping assembly 400, a third clamping assembly 500, a fourth clamping assembly 600, a fifth clamping assembly 700 and a sixth clamping assembly 800, and a positioning structure composed of a first positioning assembly and a second positioning assembly, thereby improving the quality and efficiency of welding of the transport vehicle frame 100.

[0066] Preferably, a first support plate 220, a second support plate 230 and a third support plate 240 are provided on the base plate 200, wherein a first working plane is provided on the first support plate 220 to support the left fork 111 and the right fork 112, a second working plane is provided on the second support plate 230 to support the middle gear 120, and a third working plane is provided on the third support plate 240 to support the middle crossbar 130.

[0067] It is worth mentioning that there are four first support plates 220, which are divided into two groups. The number of first support plates 220 in each group is two, one group of first support plates 220 realizes the support of both ends of the left fork 111, and the other group of first support plates 220 realizes the support of both ends of the right fork 112, wherein the first working plane located on each first support plate 220 is arranged in a stepped manner, including a first step surface 221 and a second step surface 222, and the first step surface 221 serves as a support for the middle of the left fork 111 or the right fork 112, and the second step surface 222 serves as a support for one of the two sides of the left fork 111 or the right fork 112. The second support plate 230 is located in the middle of the two groups of first support plates 220, that is, the two groups of first support plates 220 are symmetrically arranged with the second support plate 230. There are two third support plates 240 symmetrically arranged along the second support plate 230 to support both ends of the middle cross member 130 , wherein the left fork 111 and the right fork 112 are respectively provided with an avoidance hole for avoiding the corresponding third support plate 240 .

[0068] Preferably, the first positioning portion includes a protrusion 241 provided on the third support plate 240, and a recess 113 provided on the left fork 111 or the right fork 112, wherein the positioning of the left fork 111 or the right fork 112 on the first support plate 220 is achieved by snap-fitting between the protrusion 241 and the recess 113.

[0069] It is worth mentioning that the positions of the protrusion 241 and the recess 113 can be interchanged.

[0070] Preferably, the second positioning portion includes a first positioning hole 231 arranged on the second support plate 230, and a second positioning hole 121 arranged on the mid-stage 120, wherein when the first positioning hole 231 and the second positioning hole 121 are coaxially arranged, the mid-stage 120 is positioned on the second support plate 230.

[0071] Preferably, the first clamping structure includes a first linear clamping cylinder 310 and a first rotary clamping cylinder 320, wherein the position of the first linear clamping cylinder 310 corresponds to the position of the first support plate 220, the first rotary clamping cylinder 320 and the first linear clamping cylinder 310 are arranged side by side, the output end of the first linear clamping cylinder 310 abuts against the left fork 111 or the right fork 112, and the output end of the first rotary clamping cylinder 320 is connected to the first rotary clamping block 330.

[0072] It is worth mentioning that there are four first linear clamping cylinders 310, and the position of each first linear clamping cylinder 310 corresponds to the position of the first support plate 220. There are two first rotary clamping cylinders 320, and the two first rotary clamping cylinders 320 are respectively located on one side of the corresponding two first linear clamping cylinders 310.

[0073] In this embodiment, the position of the first linear clamping cylinder 310 is made to correspond to the position of the first support plate 220 because the first support plate 220 supports the end of the left fork 111 or the right fork 112, so that the first linear clamping cylinder 310 can clamp the end of the left fork 111 or the right fork 112. For the strip structure, when the two ends of the object are fixed, the overall fixation of the strip object can be achieved. Moreover, the mutual cooperation between the first linear clamping cylinder 310 and the first support plate 220 can achieve the clamping of the left fork 111 or the right fork 112, further improving the clamping limit of the left fork 111 or the right fork 112 in the horizontal direction. In addition, the first rotary clamping cylinder 320 can achieve the fixation of the left fork 111 or the right fork 112 in the vertical direction, and can also facilitate the loading of the left fork 111 or the right fork 112.

[0074] Since the middle cross bar 130 is arranged in a Z shape and is arranged vertically when installed on the middle section 120, the middle cross bar 130 includes a first vertical plate 131, a horizontal plate 132 and a second vertical plate 133, wherein the first vertical plate 131 is provided with a groove 134, and the groove 134 serves as a portion for connecting the middle cross bar 130 with the top cover assembly 150, the horizontal plate 132 is placed on the third support plate 240, and the second vertical plate 133 is connected to the fork leg 110.

[0075] Preferably, the third positioning portion includes a first support plate 211 connected to the column 210 and arranged horizontally, and a second support plate 212 connected to the first support plate 211 and arranged horizontally, wherein the first support plate 211 and the second support plate 212 form a stepped arrangement, and the second support plate 212 cooperates with the third support plate 240 to form a third working plane as a support for the cross plate 132, and the first support plate 211 forms a snap-fit ​​fit with the groove 134 to position the cross plate 132 in the horizontal direction.

[0076] Preferably, the fourth positioning portion includes a positioning column 213 connected to the column 210 , and the axial direction of the positioning column 213 is perpendicular to the length direction of the first support plate 211 , wherein the positioning column 213 is plugged into the third positioning hole on the top cover assembly 150 .

[0077] In this embodiment, the third positioning portion is provided, which not only serves as a positioning of the middle cross member 130 in the third working plane, but also when the third clamping assembly 500 acts on the top cover assembly 150, the downward pressure generated can be borne by the third positioning portion, thereby preventing the middle cross member 130 from being deformed under the indirect action of the third clamping assembly 500, thereby improving the reliability of the middle cross member 130 and the top cover assembly 150 in the vertical direction. In addition, the third positioning portion cooperates with the fourth positioning portion to realize the positioning of the upper and lower ends of the top cover assembly 150.

[0078] It is worth mentioning that the third clamping assembly 500 realizes the clamping and limiting of the side of the horizontal plate 132 close to the first vertical plate 131 , while the third clamping structure realizes the clamping and limiting of the side of the horizontal plate 132 close to the second vertical plate 133 .

[0079] Preferably, the second clamping structure includes a second rotary clamping cylinder 410 installed on the base plate 200, and the output end of the second rotary clamping cylinder 410 is connected to a second rotary clamping block 420, wherein the second rotary clamping block 420 rotates and clamps on the transverse plate 132 from top to bottom.

[0080] It is worth mentioning that the first rotary clamping cylinder 320 and the second rotary clamping cylinder 410 respectively drive the corresponding first rotary clamping block 330 and the second rotary clamping block 420 to rotate to achieve the clamping of the components. However, the first rotary clamping cylinder 320 fixes the left fork 111 or the right fork 112 by horizontal rotation, and the second rotary clamping cylinder 410 fixes the cross plate 132 by vertical rotation.

[0081] Preferably, the third clamping structure includes a second linear clamping cylinder 430 installed on the column 210, and the output end of the second linear clamping cylinder 430 is connected to the middle cross bar fixing block 440, wherein the third rotary clamping cylinder 450 is connected to both ends of the middle cross bar fixing block 440, and the output end of the third rotary clamping cylinder 450 is connected to the third rotary clamping block 460.

[0082] It is worth mentioning that the middle horizontal bar fixing block 440 is driven to move by the second linear clamping cylinder 430, so that the third rotary clamping block 460 connected to the output end of the third rotary clamping cylinder 450 crosses the first vertical plate 131, and then the third rotary clamping block 460 is driven by the third rotary clamping cylinder 450 to rotate, thereby achieving the clamping of the first vertical plate 131.

[0083] Preferably, the third clamping assembly 500 includes a fourth rotary clamping cylinder 510 installed on the column 210, and a fourth rotary clamping block 520 is connected to the output end of the fourth rotary clamping cylinder 510, wherein the fourth rotary clamping block 520 rotates and clamps on the top cover assembly 150 from top to bottom.

[0084] It is worth mentioning that the structure of the third clamping assembly 500 is the same as that of the second clamping structure.

[0085] Preferably, the fourth clamping structure includes a vertical plate 610 installed on the base plate 200, and a third linear clamping cylinder 620 installed on the vertical plate 610, and the output end of the third linear clamping cylinder 620 is connected to a support tube fixing seat, wherein the support tube fixing seat includes a first support tube fixing plate 630 and a second support tube fixing plate 640 which are arranged in a superimposed manner, and the first support tube fixing plate 630 is provided with an arc portion 631 which fits with the support tube 140, and the edge of the first support tube fixing plate 630 and the edge of the second support tube fixing plate 640 form a step portion.

[0086] It is worth mentioning that the arc portion 631 is provided on the first support tube fixing plate 630 in order to increase the contact area between the first support tube fixing plate 630 and the support tube 140 and improve the clamping of the two fourth clamping structures on the support tube 140. In addition, the U-shaped support tube 140 is buckled on the support foot, wherein the two sides of the open end of the support tube 140 are clamped by the two fourth clamping structures, and the third clamping assembly 500 acts on the closed end of the support tube 140 through the top cover assembly 150 to clamp the closed end of the support tube 140, thereby realizing the three-point clamping and limiting of the support tube 140 in the vertical plane.

[0087] Preferably, the fifth clamping structure includes a fourth linear clamping cylinder 710 installed on the vertical plate 610, and the output end of the fourth linear clamping cylinder 710 is connected to a sleeve positioning plate 720, and a sleeve positioning shaft 730 is provided on the sleeve positioning plate 720, which is nested and matched with the sleeve 162 in the sleeve assembly 160, and a support plate positioning shaft 740 is provided, which is nested and matched with the fifth positioning hole on the support plate 161 in the sleeve assembly 160, wherein, when positioning the sleeve assembly 160, the sleeve positioning shaft 730 passes through the sleeve 162 and is inserted into the fourth positioning hole of the third support plate 240.

[0088] It is worth mentioning that the sealing plate 170 is provided with a sixth positioning hole which is nested with the support plate positioning shaft 740. One end of the sealing plate 170 is plugged into the support plate positioning shaft 740 through the sixth positioning hole, and is combined with the sleeve positioning plate 720 to achieve compression of the sealing plate 170 at that end, and the other end of the sealing plate 170 is compressed through the first support tube fixing plate 630, thereby achieving compression and limiting of the sealing plate 170 in the vertical plane and the horizontal plane.

[0089] Preferably, the second positioning assembly includes a front baffle positioning seat 250 installed on the base plate 200 , and a front baffle positioning block 260 is connected to the front baffle positioning seat 250 , wherein the front baffle positioning block 260 is nested and matched with the seventh positioning hole on the front baffle 180 .

[0090] It is worth mentioning that the front baffle 180 is limited on both sides of the horizontal direction by the two sides of the open end of the support tube 140, and the front baffle 180 is limited in the vertical direction by the front baffle positioning block 260 and the second rotating clamping block 420, thereby realizing the clamping and limiting of the front baffle 180 in the horizontal and vertical directions.

[0091] Preferably, the sixth clamping structure includes a fifth linear clamping cylinder 810 installed on the column 210, and the output end of the fifth linear clamping cylinder 810 is connected to the decorative panel fixing seat 820, wherein an insert positioning seat 830 and a fifth rotary clamping cylinder 840 are arranged on the decorative panel fixing seat 820, and an eighth positioning hole is arranged on the insert positioning seat 830, and the output end of the fifth rotary clamping cylinder 840 is connected to the fifth rotary clamping block 850.

[0092] It is worth mentioning that when positioning the decorative panel 190, first align the ninth positioning hole on the decorative panel 190 with the eighth positioning hole, and then drive the fifth rotary clamping block 850 through the fifth rotary clamping cylinder 840 to clamp the decorative panel 190 between the insert positioning seat 830 and the fifth rotary clamping block 850, and finally drive the decorative panel fixing seat 820 close to the support tube 140 through the fifth linear clamping cylinder 810, so that the adjacent two sides of the decorative panel 190 are respectively fitted with the top cover assembly 150 and the closed end of the support tube 140 to achieve the positioning of the decorative panel 190.

[0093] Preferably, an ejection assembly 900 is also included, and the ejection assembly 900 includes a first ejection structure installed on the base plate 200 and a second ejection structure installed on the column 210, wherein the first ejection structure includes a first ejection cylinder 910, and the output end of the first ejection cylinder 910 is connected to a first ejection rod 920, and the first ejection cylinder 910 and the first ejection rod 920 are respectively located on the upper and lower sides of the base plate 200; the second ejection structure includes a second ejection cylinder 930, and the output end of the second ejection cylinder 930 is connected to a second ejection rod 940.

[0094] It is worth mentioning that the position of the first ejection structure corresponds to the position of the fork leg 110, and the position of the second ejection structure corresponds to the position of the top cover assembly 150. After the overall welding of the truck frame 100 is completed, the first ejection structure and the second ejection structure are synchronously extended to achieve synchronous movement of the fork leg 110 and the top cover assembly 150 in the vertical direction, thereby completing the demoulding of the truck frame 100 and improving the demoulding efficiency of the truck frame 100.

[0095] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0096] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0097] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A frame welding device for an electric transport vehicle, characterized in that: include: A bottom plate, on which a first working plane for supporting the fork legs on the transport vehicle frame is provided, and a first positioning portion for positioning the fork legs is provided in the first working plane, and a second working plane for supporting the middle gear on the transport vehicle frame is provided, and a second positioning portion for positioning the middle gear is provided in the second working plane, and a third working plane for supporting the middle cross piece on the transport vehicle frame and a column, wherein a third positioning portion for positioning the middle cross piece and a fourth positioning portion for positioning the top cover assembly on the transport vehicle frame are provided on the column; A first clamping assembly installed on the bottom plate, through which the fork legs are clamped and limited in the horizontal and vertical directions, wherein the first clamping assembly includes a first linear clamping cylinder for clamping and limiting the fork legs in the horizontal direction, and a first rotary clamping cylinder for clamping and limiting the fork legs in the vertical direction; A second clamping assembly installed on the bottom plate, through which the middle cross piece and the front baffle are clamped and limited in the horizontal and vertical directions, wherein the second clamping assembly includes a second clamping structure for clamping and limiting the middle cross piece in the vertical direction, and a third clamping structure for clamping and limiting the middle cross piece in the horizontal direction; A third clamping assembly installed on the column, through which the top cover assembly is clamped and limited in the horizontal and vertical directions, wherein the third clamping assembly includes a fourth rotary clamping cylinder for clamping and limiting the top cover assembly in the vertical direction; A fourth clamping assembly installed on the bottom plate, through which the support pipe is clamped and limited in the horizontal and vertical directions, wherein the fourth clamping assembly includes a third linear clamping cylinder for clamping and limiting the support pipe in the horizontal direction; A fifth clamping assembly installed on the bottom plate, through which the shaft sleeve assembly and the sealing plate are clamped in the horizontal and vertical directions, wherein the fifth clamping assembly includes a fourth linear clamping cylinder for clamping and limiting the shaft sleeve assembly and the sealing plate in the horizontal direction; A sixth pressing assembly installed on the column, through which the decorative plate is pressed and limited in the horizontal and vertical directions, wherein the sixth pressing assembly includes a fifth linear pressing cylinder and a fifth rotary pressing cylinder for pressing and limiting the decorative plate in the horizontal and vertical directions; The third positioning portion includes a first support plate connected to the column and arranged horizontally, and a second support plate connected to the first support plate and arranged horizontally, wherein the first support plate and the second support plate form a stepped arrangement, and the second support plate and the third support plate cooperate to form a third working plane as a support for the middle cross member, and the first support plate and the groove on the middle cross member form a snap fit to position the middle cross member in the horizontal direction; The second clamping structure includes a second rotary clamping cylinder installed on the bottom plate, and the output end of the second rotary clamping cylinder is rotated and clamped on the middle cross bar; the third clamping structure includes a second linear clamping cylinder installed on the column, and the output end of the second linear clamping cylinder is connected to the middle cross bar fixing plate, wherein the middle cross bar fixing plate is connected to the third rotary clamping cylinder, and the output end of the third rotary clamping cylinder is rotated and clamped on the middle cross bar; An ejection assembly, and the ejection assembly includes a first ejection structure installed on the base plate and a second ejection structure installed on the column, wherein the first ejection structure includes a first ejection cylinder, and the output end of the first ejection cylinder is connected to a first ejection rod, and the first ejection cylinder and the first ejection rod are respectively located on the upper and lower sides of the base plate; the second ejection structure includes a second ejection cylinder, and the output end of the second ejection cylinder is connected to a second ejection rod.

2. The frame welding device of an electric transport vehicle according to claim 1, characterized in that: A first support plate for supporting a first working plane, and the position of the first support plate corresponds to the position of the first linear clamping cylinder, and the clamping of the fork legs is achieved through the cooperation of the first support plate and the first linear clamping cylinder; a second support plate for supporting a second working plane and a third support plate for supporting a third working plane, wherein the first positioning portion is arranged between the third support plate and the fork legs, and the second positioning portion is arranged between the second support plate and the middle gear.

3. The frame welding device of an electric transport vehicle according to claim 1, characterized in that: There are two third linear clamping cylinders installed on the base plate and they are arranged opposite to each other, and there is one fourth rotary clamping cylinder installed on the column, wherein the clamping of both sides of the open end of the support tube is achieved by two third linear clamping cylinders, and the clamping of the closed end of the support tube is achieved by the fourth rotary clamping cylinder, thereby forming a three-point clamping limit for the support tube in the vertical direction.

4. A frame welding device for an electric transport vehicle according to any one of claims 1 to 3, characterized in that: The output end of the third linear clamping cylinder is connected to a support tube fixing seat, wherein the support tube fixing seat includes a first support tube fixing plate and a second support tube fixing plate which are arranged in a superimposed manner, and the first support tube fixing plate is provided with an arc-shaped portion which fits with the support tube, and the clamping and limiting of the support tube and one end of the sealing plate are realized through the first support tube fixing plate.

5. A frame welding device for an electric transport vehicle according to any one of claims 1 to 3, characterized in that: The output end of the fourth linear clamping cylinder is connected to a sleeve positioning plate, and a sleeve positioning shaft nested with the sleeve in the sleeve assembly is arranged on the sleeve positioning plate, and a support plate positioning shaft plugged with the other end of the support plate and the sealing plate in the bearing assembly is arranged.

6. A frame welding device for an electric transport vehicle according to any one of claims 1 to 3, characterized in that: The output end of the fifth linear clamping cylinder is connected to a decorative panel fixing seat, wherein an insert positioning seat and a fifth rotary clamping cylinder are provided on the decorative panel fixing seat, the decorative panel is positioned by the insert positioning seat, and the clamping and limiting of the decorative panel is achieved by the insert positioning seat and the output end of the fifth rotary clamping cylinder.

7. The frame welding device of an electric transport vehicle according to claim 1, characterized in that: A front baffle positioning seat is also provided on the bottom plate, and a front baffle positioning block is connected to the front baffle positioning seat, wherein the front baffle is positioned by the front baffle positioning block, and the front baffle is clamped and limited by the second rotary clamping cylinder.

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