A harvester walking track assembly and testing device

Abstract

The application discloses a kind of harvester walking track assembly and test device, include chassis fixed bracket, chassis support assembly, front motor power transmission assembly, track trolley and track tensioning device assembly.The track trolley is used to shift track to the corresponding installation position of chassis support assembly, realize the convenient and fast installation of track into driving sprocket tooth, the track tensioning device assembly is used for the tensioning of track horizontal direction, for the quick entry of guide wheel on chassis installation when track installation.The test device can detect the running condition of track assembly and the quality of related parts in time, and find problems in time.The harvester walking track assembly and test device are reasonably designed, low in cost, single-person operable, safe, simple and convenient to use, and save installation operation time.Improve the assembly quality of track, reduce labor intensity, eliminate the hidden danger of disassembly and repair after unqualified track installation, and effectively improve the assembly efficiency.

Description

Technical Field

[0001] This invention relates to a harvester track installation tool, and more specifically, a harvester track assembly and testing device. Background Technology

[0002] Currently, the assembly of harvester tracks typically involves using hydraulic jacks, loaders, or electric hoists to lift or hoist one side of the harvester chassis. Then, multiple workers are needed to operate and move the track, using pry bars to slowly slide the track onto the chassis sprocket. Because the track is heavy, about 200KG per track, it is difficult for workers to move it. The operating space is small, requiring 3-4 people to work simultaneously. It is time-consuming and laborious to align the teeth in the track grooves with the teeth of the front drive sprocket. After the track is on the sprocket, multiple people are needed to pull the track backward and then slide the teeth in the rear grooves onto the outer circle of the rear guide wheel. After one side of the track is assembled, the other side of the track is assembled using the same cumbersome method.

[0003] This type of harvester track assembly technology has the following disadvantages: 1. Assembling a single track requires multiple people working together, resulting in complex operation, high labor intensity, and low efficiency. 2. After the chassis is lifted to one side, it is in an inclined state, creating a small working space for personnel installing the tracks and posing a personal safety hazard. 3. If the track fails to run after assembly, timely inspection is necessary to detect its assembly condition, such as whether the track is installed correctly, the quality of components, and the track's operational status. Summary of the Invention

[0004] Therefore, it is necessary to provide a harvester track assembly and testing device to address the aforementioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A harvester track assembly and testing device, characterized in that the harvester track assembly and testing device includes a chassis fixing bracket, a chassis support assembly, a front motor power transmission assembly, a track trolley, and a track tensioning device assembly.

[0007] The chassis mounting bracket includes a horizontally arranged bracket base frame, a working platform on one side of the bracket base frame, and a longitudinally arranged arm on the working platform.

[0008] The chassis support assembly is disposed above the bracket base frame. The chassis support assembly includes a chassis, on which a gearbox, guide wheels, and a drive sprocket are mounted. A track is provided between the guide wheels and the drive sprocket. The output end of the gearbox drives the drive sprocket.

[0009] The front motor power transmission assembly is located above the work platform. The front motor power transmission assembly includes a drive motor. The output shaft of the drive motor is equipped with a motor drive wheel. The motor drive wheel drives a driven pulley via a belt. The center of the driven pulley is equipped with a transmission shaft. The inner end of the transmission shaft is connected to the input end of the gearbox. The longitudinally arranged arm is equipped with a swingable tension arm. One end of the tension arm is equipped with a tension wheel, and the other end of the tension arm is equipped with an automatic tension spring. The fixed end of the automatic tension spring is fixedly connected to the arm. The tension wheel presses the belt to make the belt tensioned.

[0010] The tracked trolley includes a transversely arranged trolley base frame, on which a longitudinally arranged vertical support is provided. The upper part of the vertical support has a rear support beam and a middle support beam. The top of the vertical support also has a transversely arranged upper horizontal tie rod. One end of the upper horizontal tie rod has a longitudinally arranged tie rod beam, and the top of the tie rod beam has a support with a pair of rollers.

[0011] The track tensioning device assembly includes an arc-shaped frame, a limiting plate on the back of the arc-shaped frame, and a hook on the outside of the limiting plate.

[0012] The track trolley is used to transfer the track to the drive sprocket and guide wheel position of the chassis support assembly, and the track tensioning device assembly is used to tension the rear part of the track.

[0013] In a preferred embodiment of the present invention, the upper part of the bracket base frame is provided with a pair of longitudinally arranged main supports and a pair of longitudinally arranged main vertical supports. The top of the main supports is provided with a U-shaped support seat. Several horizontally arranged main beams are provided between the main vertical supports. The outer side of each main vertical support is provided with a U-shaped transverse arm. The bottom of the bracket base frame is provided with several adjustable feet.

[0014] In a preferred embodiment of the present invention, the drive motor is fixed to the working platform by motor fastening bolts, a bushing is sleeved on the outside of the transmission shaft, an adjusting spacer is provided at one end of the bushing, the bushing is connected to the transmission shaft by a key, and a gasket and a locking nut are provided on the outer end of the transmission shaft.

[0015] In a preferred embodiment of the present invention, the gearbox is provided with a main drive gear, a driven gear and a limiting retaining ring, the gearbox is provided with a bearing housing mounting plate, the bearing housing mounting plate is provided with a bearing housing, the bearing housing is provided with a first bearing, the drive shaft passes through the first bearing, the main drive gear and the limiting retaining ring, the bearing housing and the bearing housing mounting plate are fastened to the corresponding mounting holes on the gearbox by bearing housing fastening bolts, and the first bearing is fixed in the bearing housing by a snap ring.

[0016] In a preferred embodiment of the present invention, the trolley base frame is provided with a plurality of horizontal support rods, the bottom of the trolley base frame is provided with a plurality of casters with limit positions, and a second bearing is provided at the center of the pair of rollers, the second bearing being mounted on the support by means of a pin.

[0017] In a preferred embodiment of the present invention, the U-shaped opening size at the back of the arc-shaped frame and the guide wheel position of the track is matched with the track thickness size in the track tooth groove for positioning.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The harvester track assembly and testing device has the following advantages:

[0020] 1. The track assembly and testing device for this harvester is reasonably designed, low in cost, can be operated by a single person, is safe and easy to use, and saves installation time. It improves the assembly quality of the tracks, reduces labor intensity, eliminates the risk of disassembly and rework due to unqualified track installation, and effectively improves assembly efficiency;

[0021] 2. This harvester track assembly and testing device uses a track trolley to install the tracks, making it convenient and reliable for movement. The chassis fixing bracket supports the weight of the chassis, providing complete stability, accurate positioning, and safety. The adjustable feet under the chassis fixing bracket can be adjusted according to the height of the tracked vehicle, facilitating the assembly requirements of various track patterns and specifications, and offering a high degree of flexibility.

[0022] 3. This harvester track assembly and testing device not only facilitates track assembly, but also simulates and checks various speed states after track installation, inspects track assembly and operation, and facilitates timely detection of problems and implementation of countermeasures.

[0023] 4. The operator of this harvester track assembly and testing device only needs to use one electric hoist to complete the track assembly task, which greatly shortens the assembly time and effectively improves the assembly quality.

[0024] 5. The track assembly and testing device for this harvester allows one person to assemble the track, unlike before when multiple people were needed to assist in the assembly. This not only reduces labor intensity and improves work efficiency, but also significantly reduces labor production costs. Attached Figure Description

[0025] To more clearly illustrate the solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the main structure of the harvester track assembly and testing device of the present invention;

[0027] Figure 2 yes Figure 1 A schematic diagram of the chassis fixing bracket in direction B of the harvester track assembly and testing device;

[0028] Figure 3 This is a top view of the structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the drive shaft and the mounting pulley assembly of the present invention;

[0030] Figure 5 This is a front view structural schematic diagram of the tracked trolley of the present invention.

[0031] Figure 6 This is a top view of the tracked trolley structure of the present invention;

[0032] Figure 7 This is a three-dimensional structural schematic diagram of the track tensioning device assembly of the present invention;

[0033] Figure 8 for Figure 7 A schematic diagram of the main structure of the track tensioning device assembly in the middle;

[0034] Figure 9 for Figure 7 A top view of the track tensioning device assembly;

[0035] Figure 10 for Figure 7 A schematic diagram of the track tensioning device assembly from the left side;

[0036] The markings in the diagram are explained as follows:

[0037] 1. Chassis mounting bracket; 11. Adjustable outriggers; 12. U-shaped support; 13. Main support; 14. Bracket base frame; 15. Main vertical support; 16. Lateral boom; 17. Main crossbeam; 18. Working platform; 19. Boom; 2. Chassis support assembly; 21. Chassis; 22. Guide wheel; 23. Track; 24. Gearbox; 241. Driven gear; 25. Drive sprocket; 3. Front motor power transmission assembly; 31. Drive motor; 311. Motor fastening bolt; 312. Motor drive wheel; 32. Automatic tension spring; 33. Tensioning arm; 34. Tensioning wheel; 35. Belt; 36. Driven pulley; 361. Bushing; 362. Bearing seat fastening bolt; 36 3. Bearing housing mounting plate; 364. Limiting retaining ring; 365. Main drive gear; 366. First bearing; 367. Bearing housing; 368. Snap ring; 369. Adjusting spacer; 37. Drive shaft; 371. Key; 372. Locking nut; 373. Washer; 4. Track trolley; 41. Rear support beam; 42. Intermediate support beam; 43. Upper horizontal tie rod; 431. Tie rod beam; 44. Support; 45. Roller; 46. Second bearing; 461. Pin; 47. Casters with limiting; 48. Trolley base frame; 481. Horizontal support rod; 49. Trolley vertical support; 5. Track tensioning device assembly; 51. Arc frame; 52. Limiting pull plate; 53. Hook. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0039] The harvester track assembly and testing device includes a chassis fixing bracket 1, a chassis support assembly 2, a front motor power transmission assembly 3, a track trolley 4, and a track tensioning device assembly 5.

[0040] The track trolley 4 is used to transfer the track 23 to the corresponding position on the chassis support assembly 2, and the track tensioning device assembly 5 is used to tension the track 23. This will be further explained later.

[0041] The chassis fixing bracket 1 includes a horizontally arranged bracket base frame 14. The upper part of the bracket base frame 14 is provided with a pair of longitudinally arranged main supports 13 and a pair of longitudinally arranged main vertical supports 15. The top of the main supports 13 is provided with a U-shaped support seat 12. Several horizontally arranged main crossbeams 17 are arranged between the main vertical supports 15. The outer side of each main vertical support 15 is provided with a U-shaped transverse arm 16. The bottom of the bracket base frame 14 is provided with several adjustable feet 11. A working platform 18 is also provided on one side of the bracket base frame 14. The working platform 18 is provided with a longitudinally arranged arm 19.

[0042] It should be noted that the height of the fixed chassis mounting bracket 1 can be adjusted appropriately using the adjustable support legs 11 to accommodate track assemblies of different specifications and models.

[0043] The rear of the chassis 21 can be supported by the main vertical support 15 and the main crossbeam 17, ensuring that the chassis is accurately and stably positioned after the chassis fixing bracket 1 is installed.

[0044] In addition, main supports 13 are welded to both sides of the front frame of the bracket base frame 14, U-shaped support seats 12 are welded to the upper surface of the main supports 13, main vertical supports 15 are welded to both sides of the rear frame of the bracket base frame 14, main crossbeams 17 are welded between the two main vertical supports 15, transverse arms 16 are welded to the outer sides of the two main vertical supports 15, and adjustable feet 11 are welded to the bottom of the bracket base frame 14.

[0045] Of course, the above-mentioned welding connection method can also be replaced by other fixing methods, such as bolt connection.

[0046] The chassis support assembly 2 is located above the bracket base frame 14. The chassis support assembly 2 includes a chassis 21, on which a gearbox 24, a guide wheel 22 and a drive sprocket 25 are provided. A track 23 is provided between the guide wheel 22 and the drive sprocket 25. The output end of the gearbox 24 drives the drive sprocket 25.

[0047] It should be noted that the U-shaped groove on the U-shaped support seat 12 in the chassis mounting bracket 1 can support the output shaft of the gearbox 23. The opening distance between the U-shaped grooves is adapted to the width of the two sides of the gearbox, so that the chassis support assembly 2 is accurately positioned on the chassis mounting bracket 1.

[0048] In addition, for the chassis support assembly 2, the gearbox 24, together with the track 23 and drive sprocket 25, needs to be installed in the mounting position at the front of the chassis 21 and tightened with bolts. Then, the guide wheel 22 is installed in the mounting hole at the rear lower part of the chassis 21 for positioning.

[0049] The front motor power transmission assembly 3 is located above the working platform 18. The front motor power transmission assembly 3 includes a drive motor 31, which is fixed to the working platform 18 by motor fastening bolts 311. A motor drive wheel 312 is mounted on the output shaft of the drive motor 31. The motor drive wheel 312 drives a driven pulley 36 via a belt 35. A transmission shaft 37 is located at the center of the driven pulley 36, and a bushing 361 is sleeved around the outside of the transmission shaft 37. An adjusting spacer 369 is provided at one end of the bushing 361. The adjusting spacer 369 is coaxially arranged with the bushing 361.

[0050] The bushing 361 is connected to the drive shaft 37 via a key 371. A washer 373 and a locking nut 372 are provided on the outer end of the drive shaft 37. The inner end of the drive shaft 37 is connected to the input end of the gearbox 24. The gearbox 24 contains a main drive gear 365, a driven gear 241, and a retaining ring 364. A bearing housing mounting plate 363 is provided on the gearbox 24, and a bearing housing 367 is provided on the bearing housing 363. A first bearing 366 is housed within the bearing housing 367, and the drive shaft 37 passes through the first bearing 366 and the main drive gear 365. 65 and limit retaining ring 364, the bearing housing 367 and bearing housing mounting plate 363 are fastened to the corresponding mounting holes on the gearbox 24 by bearing housing fastening bolts 362, the first bearing 366 is fixed in the bearing housing 367 by snap ring 368, the longitudinally arranged arm 19 is provided with a swingable tension arm 33, one end of the tension arm 33 is provided with a tension wheel 34, the other end of the tension arm 33 is provided with an automatic tension spring 32, the fixed end of the automatic tension spring 32 is fixedly connected to the arm 19, and the tension wheel 34 presses the belt 35 to tension the belt.

[0051] In addition, a fastening screw 374 is provided on the driven pulley 36 for locking the driven pulley 36.

[0052] It should be noted that the main drive gear 365 meshes with the driven gear 241 inside the gearbox 24 to transmit power.

[0053] Additionally, the spacer 369 and bushing 361 are adjusted to contact the inner ring end face of the first bearing 366, and the outer ring of the first bearing 366 is transitionally fitted with the inner hole of the bearing housing 367 and axially limited by the end face of the snap ring 368. The inner hole of the first bearing 366 is in sliding contact with the outer circle of the drive shaft 37.

[0054] In addition, the motor drive wheel 312 transmits power to the driven pulley 36 via the belt 35, and the driven pulley 36 transmits power to the drive shaft 37 via the key 371. The belt 35 is automatically tensioned by the automatic tensioning spring 32, the tensioning arm 33, and the tensioning wheel 34.

[0055] The tracked trolley 4 includes a transversely arranged trolley base frame 48, on which several horizontal support rods 481 are provided. The bottom of the trolley base frame 48 is provided with several casters 47 with limit positions. A longitudinally arranged vertical support 49 is provided on the trolley base frame 48. A rear support beam 41 and a middle support beam 42 are provided on the upper part of the vertical support 49. A transversely arranged upper horizontal tie rod 43 is also provided on the top of the vertical support 49. One end of the upper horizontal tie rod 43 is provided with a longitudinally arranged tie rod beam 431. A support 44 is provided on the top of the tie rod beam 431. A pair of rollers 45 are provided on the support 44. A second bearing 46 is located at the center of each roller 45. The second bearing 46 is mounted on the support 44 via a pin 461.

[0056] It should be noted that the end of the rear support beam 41 is welded to the end of the trolley vertical support 49 at a 90-degree angle, the end of the middle support beam 42 is welded to the end of the trolley vertical support 49 at a 90-degree angle, and the upper horizontal tie rod 43 is welded to the contact part of the trolley vertical support 49.

[0057] The vertical support 49 of the trolley is welded to the trolley base frame 48, the trolley base frame 48 is welded to the horizontal support rod 481, and the tie rod beam 431 is welded to the horizontal tie rod 43 at a 90-degree angle.

[0058] The track 23 is moved and placed on the rear support beam 41, the middle support beam 42 and the roller 45 of the track trolley 4 by an electric hoist, so that the height H of the roller of the track trolley 4 from the ground is the same as the height H of the drive sprocket 25 from the ground.

[0059] It should be noted that the rear support beam 41, the middle support beam 42, and the roller 45 support the upper inner cavity surface of the track 23, while the lower horizontal support rod 481 contacts the lower outer tooth surface of the track 23. The upper horizontal tie rod 43, the trolley base frame 48, the trolley vertical support 49, the tie rod beam 431, and the casters with limiters 47 are welded together to form the track trolley frame. The support 44, the roller 45, the second bearing 46, and the pin 461 are installed and connected together.

[0060] The track tensioning device assembly 5 includes an arc-shaped frame 51, with a limiting pull plate 52 on the back of the arc-shaped frame 51, and a hook 53 on the outer surface of the limiting pull plate 52. The hook 53 is welded to the limiting pull plate 52.

[0061] It should be noted that the diameter D of the outer arc surface of the arc frame 51 is equal to the diameter of the guide wheel 22. The U-shaped opening on the back of the arc frame is inserted into the track tooth groove at the position corresponding to the guide wheel 22 on the track 23, so as to facilitate the use of electric hook to pull the track 23 laterally onto the outer circle of the guide wheel 22. The lateral pulling force of the electric hook is converted into a horizontal component force by the electric pull rope and the lateral arm 16 on the chassis fixing bracket 1, thereby realizing the horizontal lateral pulling of the track tensioning device assembly 5.

[0062] In addition, after the track 23 is installed on the drive sprocket 25 and guide wheel 22 using the track tensioning device assembly 5, the driven pulley 36 and the drive shaft 37 assembly are partially installed on the gearbox 24 and fastened, and the belt 35 is installed on the motor drive wheel 312 and the driven pulley 36.

[0063] The following is a further explanation of the working direction of the track assembly and testing device for the harvester, including the steps:

[0064] Step S1: According to the harvester track assembly requirements, install the gearbox 24 and the drive sprockets 25 on both sides of the gearbox 24 onto the chassis 21 and fix them.

[0065] Step S2: Use an electric hoist and hook to move the chassis 21 and place it on the chassis fixing bracket 1, so that the output shaft of the gearbox 24 is placed into the U-shaped groove of the U-shaped support seat 12 for positioning, and the rear of the chassis 21 is placed on the main crossbeam 17 for positioning, and guide wheels 22 are installed on the chassis 21.

[0066] Step S3: Use an electric hoist and hook to lift the track 23 and place it on the track trolley 4. Push the track trolley 4 to the drive sprocket 25 of the chassis fixing bracket 1, aligning the center of the roller 45 on the trolley with the center of the drive sprocket 25. Figure 1 Push the tracked trolley 4 in direction A, align the track 23 with the teeth of the drive sprocket 25, and let the inner teeth of the upper part of the track 23 fall into the sprocket teeth of the drive sprocket 25. Press the locking device with the limit caster 47 to lock the limit caster 47.

[0067] Step S4: Insert the U-shaped opening of the track tensioning device assembly 5 inward into the rear guide wheel position of the track 23, and use the hook 53 to horizontally tighten the track 23. The direction of force on the hook is as follows: Figure 7 As shown by the arrow C, continue until the outer ring of the guide wheel 22 is completely inserted into the tooth groove of the track 23, thus installing the track 23.

[0068] The track test will now be conducted.

[0069] After the power switch of the drive motor 31 is turned on, the drive motor 31 starts and drives the driven pulley 36 to rotate through the belt 35. The driven pulley 36 transmits power to the drive shaft 37 through the key. The drive shaft 37 transmits power to the main drive gear 365. The main drive gear 365 meshes with the driven gear 241 in the gearbox 24. The driven gear 241 then transmits power to the drive sprocket 25. The drive sprocket 25 drives the track 23 to rotate. The speed is adjusted and tested under various working conditions through the frequency converter. At this time, the running status of the track 23 can be viewed.

[0070] The harvester track assembly and testing device has the following advantages:

[0071] 1. The track assembly and testing device for this harvester is reasonably designed, low in cost, can be operated by a single person, is safe and easy to use, and saves installation time. It improves the assembly quality of the tracks, reduces labor intensity, eliminates the risk of disassembly and rework due to unqualified track installation, and effectively improves assembly efficiency;

[0072] 2. This harvester track assembly and testing device uses a track trolley to install the tracks, making it convenient and reliable for movement. The chassis fixing bracket supports the weight of the chassis, providing complete stability, accurate positioning, and safety. The adjustable feet under the chassis fixing bracket can be adjusted according to the height of the tracked vehicle, facilitating the assembly requirements of various track patterns and specifications, and offering a high degree of flexibility.

[0073] 3. This harvester track assembly and testing device not only facilitates track assembly, but also simulates and checks various speed states after track installation, inspects track assembly and operation, and facilitates timely detection of problems and implementation of countermeasures.

[0074] 4. The operator of this harvester track assembly and testing device only needs to use one electric hoist to complete the track assembly task, which greatly shortens the assembly time and effectively improves the assembly quality.

[0075] 5. The track assembly and testing device for this harvester allows one person to assemble the track, unlike before when multiple people were needed to assist in the assembly. This not only reduces labor intensity and improves work efficiency, but also significantly reduces labor production costs.

[0076] Not limited to this, any variations or substitutions conceived without inventive effort should be included within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope defined in the claims.

Claims

1. A harvester track assembly and testing device, characterized in that, The harvester track assembly and testing device includes a chassis fixing bracket (1), a chassis support assembly (2), a front motor power transmission assembly (3), a track trolley (4), and a track tensioning device assembly (5). The chassis fixing bracket (1) includes a horizontally arranged bracket base frame (14), a working platform (18) is provided on one side of the bracket base frame (14), and a longitudinally arranged arm (19) is provided on the working platform (18). The chassis support assembly (2) is disposed above the bracket bottom frame (14). The chassis support assembly (2) includes a chassis (21). The chassis (21) is provided with a gearbox (24), a guide wheel (22) and a drive sprocket (25). A track (23) is provided between the guide wheel (22) and the drive sprocket (25). The output end of the gearbox (24) drives the drive sprocket (25). The front motor power transmission assembly (3) is located above the working platform (18). The front motor power transmission assembly (3) includes a drive motor (31). The output shaft of the drive motor (31) is provided with a motor drive wheel (312). The motor drive wheel (312) drives the driven pulley (36) through a belt (35). The center of the driven pulley (36) is provided with a transmission shaft (37). The inner end of the transmission shaft (37) is connected to the input end of the gearbox (24). The longitudinally arranged arm (19) is provided with a swingable tension arm (33). One end of the tension arm (33) is provided with a tension wheel (34). The other end of the tension arm (33) is provided with an automatic tension spring (32). The fixed end of the automatic tension spring (32) is fixedly connected to the arm (19). The tension wheel (34) presses the belt (35) to make the belt (35) tensile. The tracked trolley (4) includes a trolley base frame (48) arranged laterally, a trolley vertical support (49) arranged longitudinally on the trolley base frame (48), a rear support beam (41) and a middle support beam (42) on the upper part of the trolley vertical support (49), an upper horizontal tie rod (43) arranged laterally on the top of the trolley vertical support (49), a tie rod beam (431) arranged longitudinally on one end of the upper horizontal tie rod (43), a support (44) on the top of the tie rod beam (431), and a pair of rollers (45) on the support (44). The track tensioning device assembly (5) includes an arc-shaped frame (51), a limiting pull plate (52) is provided on the back of the arc-shaped frame (51), and a pull hook (53) is provided on the outside of the limiting pull plate (52). The track trolley (4) is used to transfer the track (23) to the position of the drive sprocket (25) and guide wheel (22) of the chassis support assembly (2), and the track tensioning device assembly (5) is used to tension the rear part of the track (23).

2. The harvester track assembly and testing device according to claim 1, characterized in that, The upper part of the bracket base frame (14) is provided with a pair of longitudinally arranged main supports (13) and a pair of longitudinally arranged main vertical supports (15). The top of the main supports (13) is provided with a U-shaped support seat (12). Several horizontally arranged main beams (17) are provided between the main vertical supports (15). The outer side of each main vertical support (15) is provided with a cross-shaped transverse arm (16). The bottom of the bracket base frame (14) is provided with several adjustable feet (11).

3. The harvester track assembly and testing device according to claim 1, characterized in that, The drive motor (31) is fixed on the working platform (18) by motor fastening bolts (311). A bushing (361) is sleeved on the outside of the transmission shaft (37). One end of the bushing (361) is provided with an adjusting spacer (369). The bushing (361) is connected to the transmission shaft (37) by a key (371). A washer (373) and a locking nut (372) are provided on the outer end of the transmission shaft (37).

4. The harvester track assembly and testing device according to claim 1, characterized in that, The gearbox (24) is provided with a main drive gear (365), a driven gear (241) and a retaining ring (364). The gearbox (24) is provided with a bearing housing mounting plate (363). The bearing housing mounting plate (363) is provided with a bearing housing (367). The bearing housing (367) is provided with a first bearing (366). The drive shaft (37) passes through the first bearing (366), the main drive gear (365) and the retaining ring (364). The bearing housing (367) and the bearing housing mounting plate (363) are fastened to the corresponding mounting holes on the gearbox (24) by bearing housing fastening bolts (362). The first bearing (366) is fixed in the bearing housing (367) by a snap ring (368).

5. The harvester track assembly and testing device according to claim 1, characterized in that, The trolley base frame (48) is provided with several horizontal support rods (481), and the bottom of the trolley base frame (48) is provided with several casters with limiters (47). The center of each pair of rollers (45) is provided with a second bearing (46), and the second bearing (46) is installed on the support (44) by means of a pin (461).

6. The harvester track assembly and testing device according to claim 5, characterized in that, The U-shaped opening size at the position of the guide wheel (22) at the back of the arc frame (51) and the track (23) is matched with the track thickness size in the track tooth groove for positioning.

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