Electric forklift vertical reduction gearbox test device

Abstract

The present invention relates to a vertical reduction box test device for electric forklifts, comprising a table, on which a loading device, a first speed torque meter and a connecting shaft are sequentially arranged and connected, a reduction box assembly is also arranged on the table, the reduction box assembly is fixed on the table by a positioning table, the connecting shaft forms a connection or separation with the output end of the reduction box assembly under the action of a driving cylinder, an input shaft, a second speed torque meter and a motor are sequentially arranged and connected from bottom to top above the reduction box assembly, the input shaft is connected to the input end of the reduction box assembly, the input shaft is fixed to the second positioning flange of the motor bracket through a bearing seat, and the second positioning flange and the reduction box assembly are locked by a clamping oil cylinder arranged on the positioning table, the motor is connected to a suspension device arranged on the side of the table through a motor bracket, and the motor bracket can realize horizontal and vertical movement and circumferential rotation. The device can enable different types of vertical reduction boxes to be tested on the same test device.

Description

Technical Field

[0001] The invention relates to the field of electric forklift reduction gearboxes, and in particular to a vertical reduction gearbox testing device for electric forklifts. Background Art

[0002] At present, there are many types of vertical reducers used in electric forklifts. Although some of them have similar appearance and structure, their appearance and size are different, which makes it difficult for the existing reducer test equipment to cover all types of vertical reducers for testing. As a result, some types of vertical reducers are directly loaded on the vehicle after assembly, and the vertical reducer is tested simultaneously during vehicle commissioning. This method has the following disadvantages: 1) The vertical reducer is tested after loading. If a problem is found in the vertical reducer during vehicle commissioning, the vehicle needs to be unloaded, the reducer disassembled and inspected, reloaded, and commissioned for verification, etc., which has low testing efficiency and high labor intensity; 2) Products are updated quickly, and the existing test equipment is difficult to meet the bench test requirements of new types of vertical reducers. Summary of the invention

[0003] The object of the present invention is to provide a vertical reduction gearbox testing device for electric forklifts, which can enable different types of vertical reduction gearboxes to be tested on the same testing device.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: comprising a table, on which a loading device, a first speed torque meter and a connecting shaft are sequentially arranged and connected, a reduction box assembly is also provided on the table, the reduction box assembly is fixed on the table through a positioning table, the connecting shaft forms a connection or separation with the output end of the reduction box assembly under the action of a driving cylinder, an input shaft, a second speed torque meter and a motor are sequentially arranged and connected from bottom to top on the top of the reduction box assembly, the input shaft is connected to the input end of the reduction box assembly, the input shaft is fixed to the second positioning flange of the motor bracket through a bearing seat, and the second positioning flange and the reduction box assembly are locked by a clamping cylinder arranged on the positioning table, the motor is connected to a suspension device arranged on the side of the table through a motor bracket, and the motor bracket can realize horizontal and vertical movement and circumferential rotation;

[0005] The positioning platform comprises a frame-type base frame, the upper end surface of the base frame is provided with first guide columns at its four corners, the first guide columns are matched with the guide sleeves on the fixed plate, the first guide columns are provided with supporting devices for supporting the fixed plate, the clamping cylinder is arranged on the upper end surface of the base frame, and the height of the clamping cylinder is adjustable;

[0006] The support device includes a core shaft arranged perpendicularly to the first guide column, and the core shaft is a stepped shaft, including a first shaft section, a second shaft section and a third shaft section with decreasing diameters in sequence, wherein: the first shaft section has four groups of fixed blocks evenly arranged along its circumference, the length directions of the four groups of fixed blocks are consistent with the length direction of the first shaft section, and the four groups of fixed blocks are respectively provided with ball head studs arranged in a vertical direction, the heights of the ball head studs on the four groups of fixed blocks are different, and two ball head studs are arranged on each group of fixed blocks.

[0007] The reduction gearbox assembly includes a reduction gearbox body and a fixed plate for mounting the reduction gearbox body. The input end of the reduction gearbox body is connected through the center of the fixed plate. The output end of the reduction gearbox body is provided with a spline shaft that matches the connecting shaft. Guide sleeves are respectively provided at the four corners of the fixed plate, and the guide sleeves are positioned in cooperation with the first guide column on the positioning stand.

[0008] The connecting shaft forms a sliding fit with the slide rail arranged on the table through the slide bearing seat. The table is provided with a driving cylinder connected to the slide bearing seat. The driving cylinder drives the slide bearing seat to slide along the direction defined by the slide rail to form a connection or separation with the spline shaft on the reduction gear assembly.

[0009] The clamping cylinder is connected to the base frame through a height adjustment device, and the height adjustment device includes a base fixed to the base frame and a support fixed to the clamping cylinder, the support includes a positioning shaft arranged in a vertical direction, and the top of the positioning shaft is provided with a first flange connected to the clamping cylinder, the base includes a sleeve matching the positioning shaft and a second flange arranged at the bottom of the sleeve, the second flange is fixed to the upper end surface of the base frame, the positioning shaft is provided with a plurality of first positioning holes along its height direction, and the sleeve is provided with a plurality of second positioning holes along its height direction, the height position of the positioning shaft in the sleeve is adjustable, and the positioning shaft and the sleeve are fixed by a positioning pin.

[0010] The first guide column is provided with a first pin hole matching with the third shaft section, the diameter of the first guide column is consistent with the length of the third shaft section, the end of the third shaft section is provided with an internal threaded hole matching with the fastening bolt, the first guide column is also provided with a second pin hole matching with the fixing pin, and the third shaft section is also provided with a third pin hole matching with the fixing pin, the first pin hole and the second pin hole are both arranged through the first guide column, and the first pin hole and the second pin hole are distributed in a cross shape, the third pin hole is arranged through the third shaft section, and the third pin holes are arranged in two groups in a cross shape.

[0011] The two ends of the second speed torque meter are respectively connected to the output end of the motor and the bearing seat through a coupling, one end of the input shaft is connected to the bearing seat, and the other end of the input shaft is connected to the input end of the reduction box assembly.

[0012] The motor bracket includes a first positioning flange, a second positioning flange and a first column connecting the first positioning flange and the second positioning flange, which are arranged in parallel in the upper and lower directions. The motor is installed on the upper end surface of the first positioning flange, the bearing seat is installed on the upper end surface of the second positioning flange, and the second speed and torque meter is fixedly installed on the first column through a connecting block.

[0013] The suspension device includes a supporting column arranged on the side of the table, and the supporting column is provided with a beam and a guide rail rotatably connected to the supporting column, the other end of the beam is fixedly connected to the upper side of the guide rail, the other end of the guide rail is in a cantilevered state, and the guide rail is provided with a roller matching therewith, the suspension device also includes a top plate fixed to the roller, a cylinder is provided under the top plate, the piston rod end of the cylinder passes through the cylinder mounting seat and is fixed to the lower surface of the top plate, a second guide column is provided between the cylinder mounting seat and the top plate, the cylinder body end of the cylinder is fixed to the connecting plate, and the connecting plate is connected to the first positioning flange of the motor bracket through the second column.

[0014] The beneficial effects of the present invention are: 1) The present invention can solve the problem that some types of vertical reducers cannot be clamped and tested on existing test devices, effectively avoiding the need to discover faults after the reducer is loaded and debugged, as well as the extra workload caused by the whole vehicle being unloaded, reloaded, and debugged and re-verified. 2) The present invention can also quickly solve the problem of bench testing of new types of reducers. Only a small number of connectors need to be made and replaced to achieve the clamping and testing of new reducers on the test device. 3) The positioning, clamping, and docking of the reducer on the test device of the present invention are highly automated. Compared with existing test devices, the clamping efficiency is high, which improves the detection efficiency of the reducer to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the reduction box assembly of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the positioning stand of the present invention.

[0018] Figure 4 The axonometric measurement of the positioning stand of the present invention Figure 1 .

[0019] Figure 5 The axonometric measurement of the positioning stand of the present invention Figure 2 .

[0020] Figure 6 It is a structural schematic diagram of the supporting device of the present invention.

[0021] Figure 7 It is a structural schematic diagram of the clamping cylinder of the present invention.

[0022] Figure 8 It is a schematic structural diagram of the drive unit of the present invention.

[0023] Fig. 9 1 is a schematic diagram of the structure of the suspension device of the present invention.

[0024] The symbols in the above drawings are: table 1, loading device 11, first speed torque meter 12, connecting shaft 13, driving cylinder 14, slide bearing seat 15, slide rail 16, reduction gearbox assembly 2, reduction gearbox body 21, fixing plate 22, spline shaft 23, guide sleeve 24, positioning table 3, first guide column 31, first pin hole 311, second pin hole 312, base frame 32, supporting device 33, spindle 34, third pin hole 341, fixing block 35, ball stud 36, fastening bolt 37, internal thread hole 38, fixing pin 39, input Shaft 4, second speed torque meter 5, connecting block 51, motor 6, bearing seat 41, motor bracket 7, second positioning flange 71, first positioning flange 72, first column 73, clamping cylinder 8, base 81, sleeve 811, second flange 812, support 82, positioning shaft 821, first flange 822, positioning pin shaft 83, suspension device 9, supporting column 91, beam 92, guide rail 93, roller 94, top plate 95, cylinder 96, cylinder mounting seat 97, second guide column 98, connecting plate 99, second column 991. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] like Figure 1 The vertical gearbox test device for electric forklift shown in the figure comprises a table 1, on which a loading device 11, a first speed torque meter 12 and a connecting shaft 13 are sequentially arranged and connected, and a gearbox assembly 2 is also provided on the table 1, and the gearbox assembly 2 is fixed on the table 1 through a positioning table 3, and the connecting shaft 13 is connected or separated with the output end of the gearbox assembly 2 under the action of a driving cylinder 14. Specifically, the connecting shaft 13 forms a sliding fit with a slide rail 16 provided on the table 1 through a slide bearing seat 15, and a driving cylinder 14 connected to the slide bearing seat 15 is provided on the table 1, and the driving cylinder 14 drives the slide bearing seat 15 to slide along the direction defined by the slide rail 16 to form a connection or separation with the spline shaft 23 on the gearbox assembly 2. Among them, the loading device 11, the first speed torque meter 12 and the slide bearing seat 15 are conventional configurations of the test device, and are all indirectly fixed on the table 1 through a mounting seat.

[0027] The input shaft 4, the second speed torque meter 5 and the motor 6 are sequentially arranged and connected from bottom to top on the reduction box assembly 2. The input shaft 4 is connected to the input end of the reduction box assembly 2. The input shaft 4 is fixed to the second positioning flange 71 of the motor bracket 7 through the bearing seat 41, and the second positioning flange 71 and the reduction box assembly 2 are locked by the clamping cylinder 8 set on the positioning platform 3. The motor 6 is connected to the suspension device 9 set on the side of the platform 1 through the motor bracket 7, and the motor bracket 7 can realize horizontal and vertical movement and circumferential rotation. Among them: the input shaft 4, the second speed torque meter 5, the motor 6, and the motor bracket 7 form a drive unit.

[0028] Further, such as Figure 2 As shown, the reduction box assembly 2 includes a reduction box body 21 and a fixing plate 22 for mounting the reduction box body 21. The input end of the reduction box body 21 is connected through the center of the fixing plate 22. The output end of the reduction box body 21 is provided with a spline shaft 23 matched with the connecting shaft 13. The four corners of the fixing plate 22 are respectively provided with guide sleeves 24, and the guide sleeves 24 are matched with the first guide column 31 on the positioning platform 3 for positioning. That is, the reduction box assembly 2 is composed of the fixing plate 22, the guide sleeves 24, the reduction box body 21, and the spline shaft 23. The four guide sleeves 24 are respectively installed at the four corners of the fixing plate 22. The spline shaft 23 is installed on the reduction box body 21, and is connected to the fixing plate 22 together with the reduction box body 21 to form a whole.

[0029] Further, such as Figure 3 , Figure 4 , Figure 5 As shown, the positioning platform 3 includes a frame-type base frame 32, and the upper end surface of the base frame 32 is respectively provided with first guide columns 31 at its four corners. The first guide columns 31 cooperate with the guide sleeves 24 on the fixed plate 22. The first guide columns 31 are provided with supporting devices 33 for supporting the fixed plate 22. The clamping cylinder 8 is arranged on the upper end surface of the base frame 32, and the height of the clamping cylinder 8 is adjustable.

[0030] Specifically, Figure 6As shown, the support device 33 includes a core shaft 34 arranged perpendicularly to the first guide column 31, and the core shaft 34 is a stepped shaft, including a first shaft section, a second shaft section and a third shaft section with decreasing diameters in sequence, wherein: the first shaft section has four groups of fixing blocks 35 evenly spaced along its circumference, and the length directions of the four groups of fixing blocks 35 are consistent with the length direction of the first shaft section, and the four groups of fixing blocks 35 are respectively provided with ball head studs 36 arranged in a vertical direction, and the ball head studs 36 on the four groups of fixing blocks 35 are different in height, and two ball head studs 36 are arranged on each group of fixing blocks 35. That is, the first shaft section of the mandrel is evenly distributed with the first fixing block, the second fixing block, the third fixing block and the fourth fixing block along its circumference, and the first fixing block, the second fixing block, the third fixing block and the fourth fixing block are respectively provided with the first ball stud, the second ball stud, the third ball stud and the fourth ball stud, and the heights of the first ball stud, the second ball stud, the third ball stud and the fourth ball stud are different from each other, and two first ball studs are provided on the first fixing block, and the heights of the two first ball studs are the same. The ball studs 36 on the four groups of fixing blocks 35 are set to structures with different heights in order to be suitable for different types of reduction gearboxes 2.

[0031] The first guide column 31 is provided with a first pin hole 311 matched with the third shaft section, the diameter of the first guide column 31 is consistent with the length of the third shaft section, the end of the third shaft section is provided with an internal threaded hole 38 matched with the fastening bolt 37, the first guide column 31 is also provided with a second pin hole 312 matched with the fixing pin 39, and the third shaft section is also provided with a third pin hole 341 matched with the fixing pin 39, the first pin hole 311 and the second pin hole 312 are both set through the first guide column 31, and the first pin hole 311 and the second pin hole 312 are distributed in a cross shape, the third pin hole 341 is set through the third shaft section, and the third pin hole 341 is set in two groups in a cross shape. During installation, the third shaft section of the mandrel is inserted into the first pin hole 311 on the first guide column 31, and then the position of the third shaft section is adjusted so that the fixing pin 39 is inserted into the second pin hole 312 and the third pin hole 311 to achieve initial positioning and locking, and finally the mandrel is locked with the first guide column 31 by the bolt 37. Before the test, a suitable set of ball studs 36 can be selected for support according to the type of the reduction box assembly 2 and the center height from the lower end surface of the fixing plate 22 to the spline shaft 23. When each set of ball studs 36 is switched, it is only necessary to rotate the mandrel 90 degrees.

[0032] Specifically, Figure 7As shown, the clamping cylinder 8 is connected to the base frame 32 through a height adjusting device, and the height adjusting device includes a base 81 fixed to the base frame 32 and a support 82 fixed to the clamping cylinder 8, the support 82 includes a positioning shaft 821 arranged in a vertical direction, and the top of the positioning shaft 821 is provided with a first flange 822 connected to the clamping cylinder 8, the base 81 includes a sleeve 811 matched with the positioning shaft 821 and a second flange 812 arranged at the bottom of the sleeve 811, the second flange 812 is fixed to the upper end surface of the base frame 32, the positioning shaft 821 is provided with a plurality of first positioning holes along its height direction, and the sleeve 811 is provided with a plurality of second positioning holes along its height direction, the height position of the positioning shaft 821 in the sleeve 811 is adjustable, and the positioning shaft 821 and the sleeve 811 are fixed by a positioning pin 83. In this embodiment, three groups of clamping cylinders 8 are arranged. After the driving unit is docked with the reduction gearbox assembly 2, the clamping cylinders 8 are actuated, and the pressure plates of the clamping cylinders 8 are pressed on the second positioning flange 71, thereby fixing the reduction gearbox assembly 2 and the driving unit on the positioning stand 3. Before the test, the height of the clamping cylinders 8 can be appropriately adjusted according to the external dimensions of the reduction gearbox body 21.

[0033] Further, such as Figure 8 As shown, both ends of the second speed torque meter 5 are connected to the output end of the motor 6 and the bearing seat 41 through a coupling, one end of the input shaft 4 is connected to the bearing seat 41, and the other end of the input shaft 4 is connected to the input end of the reduction box assembly 2. The motor bracket 7 includes a first positioning flange 72, a second positioning flange 71 arranged in parallel in the vertical direction, and a first column 73 connecting the first positioning flange 72 and the second positioning flange 71. The motor 6 is mounted on the upper end surface of the first positioning flange 72, the bearing seat 41 is mounted on the upper end surface of the second positioning flange 71, and the second speed torque meter 5 is fixedly mounted on the first column 73 through a connecting block 51.

[0034] like Fig. 9As shown, the suspension device 9 includes a supporting column 91 arranged on the side of the table 1, and a beam 92 and a guide rail 93 rotatably connected to the supporting column 91 are provided on the supporting column 91, the other end of the beam 92 is fixedly connected to the upper side of the guide rail 93, the other end of the guide rail 93 is in a cantilevered state, and a roller 94 matching with the guide rail 93 is provided on the guide rail 93, and the suspension device 9 also includes a top plate 95 fixed to the roller 94, a cylinder 96 is provided below the top plate 95, a piston rod end of the cylinder 96 passes through a cylinder mounting seat 97 and is fixed to the lower surface of the top plate 95, a second guide column 98 is provided between the cylinder mounting seat 97 and the top plate 95, the cylinder body end of the cylinder 96 is fixed to a connecting plate 99, and the connecting plate 99 is connected to the first positioning flange 72 of the motor bracket 7 through a second column 991. The movement of the cylinder 96 can drive the driving unit at the lower end to move in the vertical direction, and the movement of the roller 94 on the guide rail 93 can drive the driving unit at the lower end to move in the horizontal direction. At the same time, the beam 92 and the guide rail 93 can rotate on the supporting column 91.

[0035] The working principle of the present invention is as follows:

[0036] First, install the spline shaft on the reducer body, select a suitable fixing plate according to the type of the reducer body, and then install the fixing plate on the reducer body; also, according to the type of the tested reducer body, and according to the center height from the lower end face of the fixing plate to the spline shaft, select a suitable support device. Then put the reducer assembly on the positioning bench, and through the guide sleeve on the reducer assembly and the first guide column on the positioning bench, the reducer assembly automatically falls on the ball stud of the support device under the action of its own weight. Also, according to the type of the tested reducer body, select a suitable input shaft and second positioning flange for replacement, and then install the drive unit on the reducer assembly, the clamping cylinder is actuated, and the clamping plate of the clamping cylinder is pressed on the second positioning flange, so that the reducer assembly and the drive unit are fixed on the positioning bench. Finally, the drive cylinder is actuated, the slide bearing seat moves, and the connecting shaft is pushed into the spline shaft to achieve automatic docking between the two. Turn on the control system to carry out various tests and inspections of the reducer body.

[0037] The beneficial effects of the present invention are: 1) The present invention can solve the problem that some types of vertical reducers cannot be clamped and tested on existing test devices, effectively avoiding the need to discover faults after the reducer is loaded and debugged, as well as the extra workload caused by the whole vehicle being unloaded, reloaded, and debugged and re-verified. 2) The present invention can also quickly solve the problem of bench testing of new types of reducers. Only a small number of connectors need to be made and replaced to achieve the clamping and testing of new reducers on the test device. 3) The positioning, clamping, and docking of the reducer on the test device of the present invention are highly automated. Compared with existing test devices, the clamping efficiency is high, which improves the detection efficiency of the reducer to a certain extent.

[0038] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A vertical reduction gearbox test device for electric forklifts, characterized in that: The invention comprises a platform (1), wherein a loading device (11), a first speed torque meter (12) and a connecting shaft (13) are sequentially arranged and connected to the platform (1), and a reduction gearbox assembly (2) is also arranged on the platform (1), wherein the reduction gearbox assembly (2) is fixed to the platform (1) via a positioning platform (3), and the connecting shaft (13) is connected to or separated from the output end of the reduction gearbox assembly (2) under the action of a driving cylinder (14), and an input shaft (4), a second speed torque meter (12) and a connecting shaft (13) are sequentially arranged and connected to the top of the reduction gearbox assembly (2) from bottom to top. 5) and a motor (6), the input shaft (4) being connected to the input end of the reduction box assembly (2), the input shaft (4) being fixed to the second positioning flange (71) of the motor bracket (7) through a bearing seat (41), and the second positioning flange (71) and the reduction box assembly (2) being locked through a clamping cylinder (8) arranged on the positioning platform (3), the motor (6) being connected to a suspension device (9) arranged on the side of the platform (1) through the motor bracket (7), and the motor bracket (7) being capable of realizing horizontal and vertical movement and circumferential rotation; The positioning platform (3) comprises a frame-type base frame (32), the upper end surface of the base frame (32) is provided with first guide columns (31) at its four corners, the first guide columns (31) cooperate with the guide sleeves (24) on the fixed plate (22), the first guide columns (31) are provided with support devices (33) for supporting the fixed plate (22), the clamping cylinder (8) is arranged on the upper end surface of the base frame (32), and the height of the clamping cylinder (8) is adjustable; The support device (33) comprises a core shaft (34) arranged perpendicularly to the first guide column (31), the core shaft (34) being a stepped shaft, comprising a first shaft section, a second shaft section and a third shaft section of decreasing diameters, wherein: the first shaft section is evenly spaced along its circumference with four groups of fixing blocks (35), the length directions of the four groups of fixing blocks (35) are consistent with the length direction of the first shaft section, and the four groups of fixing blocks (35) are respectively provided with ball studs (36) arranged in a vertical direction, the ball studs (36) on the four groups of fixing blocks (35) have different heights, and each group of fixing blocks (35) is provided with two ball studs (36).

2. The electric forklift vertical reduction gearbox test device according to claim 1 is characterized in that: The reduction gearbox assembly (2) comprises a reduction gearbox body (21) and a fixing plate (22) for mounting the reduction gearbox body (21); the input end of the reduction gearbox body (21) is connected through the center of the fixing plate (22); the output end of the reduction gearbox body (21) is provided with a spline shaft (23) matching with the connecting shaft (13); guide sleeves (24) are respectively provided at the four corners of the fixing plate (22); the guide sleeves (24) are matched with the first guide columns (31) on the positioning platform (3) for positioning.

3. The electric forklift vertical reduction gearbox test device according to claim 2 is characterized in that: The connecting shaft (13) forms a sliding fit with a slide rail (16) provided on the table (1) through a slide bearing seat (15); a driving cylinder (14) connected to the slide bearing seat (15) is provided on the table (1); the driving cylinder (14) drives the slide bearing seat (15) to slide along a direction defined by the slide rail (16) to form a connection or separation with a spline shaft (23) on the reduction gearbox assembly (2).

4. The electric forklift vertical reduction gearbox test device according to claim 1, characterized in that: The clamping cylinder (8) is connected to the base frame (32) via a height adjustment device, the height adjustment device comprising a base (81) fixed to the base frame (32) and a support (82) fixed to the clamping cylinder (8), the support (82) comprising a positioning shaft (821) arranged in a vertical direction, the top of the positioning shaft (821) being provided with a first flange (822) connected to the clamping cylinder (8), the base (81) comprising a sleeve (821) matching the positioning shaft (821), 11) and a second flange (812) arranged at the bottom of the sleeve (811), the second flange (812) being fixed to the upper end surface of the base frame (32), the positioning shaft (821) being provided with a plurality of first positioning holes along its height direction, the sleeve (811) being provided with a plurality of second positioning holes along its height direction, the positioning shaft (821) being adjustable in height within the sleeve (811), and the positioning shaft (821) and the sleeve (811) being fixed via a positioning pin (83).

5. The electric forklift vertical reduction gearbox test device according to claim 1, characterized in that: The first guide column (31) is provided with a first pin hole (311) matched with the third shaft section. The diameter of the first guide column (31) matches the length of the third shaft section. The end of the third shaft section is provided with an internal threaded hole (38) matched with a fastening bolt (37). The first guide column (31) is also provided with a second pin hole (312) matched with a fixing pin (39). The third shaft section is also provided with a third pin hole (341) matched with the fixing pin (39). The first pin hole (311) and the second pin hole (312) are both arranged through the first guide column (31), and the first pin hole (311) and the second pin hole (312) are distributed in a cross shape. The third pin hole (341) is arranged through the third shaft section, and the third pin holes (341) are arranged in two groups in a cross shape.

6. The electric forklift vertical reduction gearbox testing device according to claim 1, characterized in that: The two ends of the second speed torque meter (5) are respectively connected to the output end of the motor (6) and the bearing seat (41) through a coupling, one end of the input shaft (4) is connected to the bearing seat (41), and the other end of the input shaft (4) is connected to the input end of the reduction gearbox assembly (2).

7. The electric forklift vertical reduction gearbox testing device according to claim 1 is characterized in that: The motor bracket (7) comprises a first positioning flange (72), a second positioning flange (71) and a first column (73) connected to the first positioning flange (72) and the second positioning flange (71) arranged in parallel in the vertical direction; the motor (6) is mounted on the upper end surface of the first positioning flange (72); the bearing seat (41) is mounted on the upper end surface of the second positioning flange (71); and the second speed torque meter (5) is fixedly mounted on the first column (73) via a connecting block (51).

8. The electric forklift vertical reduction gearbox testing device according to claim 1, characterized in that: The suspension device (9) comprises a support column (91) arranged beside the table (1); the support column (91) is provided with a beam (92) and a guide rail (93) rotatably connected to the support column (91); the other end of the beam (92) is fixedly connected to the upper side of the guide rail (93); the other end of the guide rail (93) is cantilevered, and the guide rail (93) is provided with a roller (94) matched therewith; the suspension device (9) also comprises a top plate (92) fixed to the roller (94) 95), a cylinder (96) is provided below the top plate (95), a piston rod end of the cylinder (96) passes through a cylinder mounting seat (97) and is fixed to the lower surface of the top plate (95), a second guide column (98) is provided between the cylinder mounting seat (97) and the top plate (95), a cylinder body end of the cylinder (96) is fixed to a connecting plate (99), and the connecting plate (99) is connected to a first positioning flange (72) of the motor bracket (7) via a second column (991).

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