Welding tool for rear support of rice transplanter

Abstract

The utility model relates to a rice transplanter rear support welding tool which comprises a first positioning pin device, a first combined positioning device, a second combined positioning device, a third combined positioning device, a first positioning sleeve, a positioning movable block, a first positioning pin and a plurality of pressing devices. The first positioning sleeve is used for positioning a rear inner lining plate and a rear main support plate, the positioning movable block is used for supporting the rear inner lining plate and pressing the rear main support plate, the first positioning pin device is used for positioning a connecting shaft, and the multiple pressing devices are used for pressing parts to be welded. All the to-be-welded parts are clamped and positioned through the combined positioning device, the positioning pins and the pressing device, the accuracy of the relative positions of all the to-be-welded parts is guaranteed, the welding quality is guaranteed, operation is easy, time and labor are saved, the welding quality of the rear support is improved, and the welding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, specifically to a welding fixture for the rear support of a rice transplanter. Background Technology

[0002] In rice transplanters, the rear support frame serves to support other components and is an important part of the machine. Existing welding fixtures for rear supports are mostly simple, requiring manual clamping of the parts to be welded, which makes it difficult to guarantee quality and is time-consuming and labor-intensive. Utility Model Content

[0003] This utility model addresses the existing technical problems by providing a welding fixture for the rear support of a rice transplanter.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A welding fixture for the rear support of a rice transplanter includes a positioning pin device 1, a combined positioning device 1, a combined positioning device 2, a combined positioning device 3, a positioning sleeve 1, a positioning movable block, a positioning pin 1, and multiple pressing devices. The combined positioning device 1 and the combined positioning device 2 cooperate to support the rear main support plate. The positioning sleeve 1 is used to position the rear inner liner plate and the rear main support plate. The positioning movable block is used to support the rear inner liner plate and press the rear main support plate. The positioning pin device 1 is used to position the connecting shaft.

[0005] The combined positioning device is used to clamp ear plate three, ear plate four and stiffening plate;

[0006] The second combined positioning device is used to clamp the first ear plate and the second ear plate;

[0007] The combined positioning device three is used to clamp the leveling mounting plate, the leveling connecting sleeve, and the steel column;

[0008] The positioning pin is used to position the upper plate.

[0009] Multiple clamping devices are used to clamp the workpiece to be welded.

[0010] Based on the above technical solution, the present invention can be further improved as follows:

[0011] Preferably, the positioning pin device one includes a positioning pin three and a positioning sleeve two. The positioning pin three is provided with a positioning assembly surface. The positioning sleeve one is detachably installed on the positioning assembly surface. The lower end of the positioning sleeve two is provided with a positioning cylindrical surface. The positioning sleeve two uses the positioning cylindrical surface to press the positioning sleeve one. The positioning sleeve one is used to cooperate with the arc-shaped grooves of the rear main support plate and the rear inner liner plate. Both the combined positioning device one and the combined positioning device two include two-hole positioning blocks. The two-hole positioning blocks are used to support the rear main support plate.

[0012] Preferably, the combined positioning device 2 includes a positioning pin 4, a positioning plate 3 and a positioning plate 4. The positioning plate 3 is provided with a positioning surface 7, and the positioning plate 4 is provided with a positioning surface 8. The positioning surface 7 is used to support the ear plate 2, and the positioning surface 8 is used to support the ear plate 1. There are two positioning pins 4, and the positioning pins 4 are used to position the ear plate 1 and the ear plate 2.

[0013] Preferably, the combined positioning device includes a positioning plate 1 and a positioning plate 2. The positioning plate 1 is provided with a positioning surface 5 and a magnet, and the positioning plate 2 is provided with a positioning surface 6 and a magnet. The positioning surface 5 and the positioning surface 6 are used to support the two rib plates, and the magnet is used to attract the rib plates.

[0014] Preferably, the combined positioning device further includes a positioning pin four, a positioning surface three, and a positioning surface four. The positioning surface three and the positioning surface four are used to support the ear plate three and the ear plate four, and the positioning pin four is used to position the ear plate three and the ear plate four.

[0015] Preferably, the combined positioning device three includes a positioning plate five, a positioning pin five, and a positioning pin six. The positioning plate five is used to support the leveling mounting plate, and the positioning pin five and the positioning pin six are used to position the leveling mounting plate and the leveling connecting sleeve.

[0016] Preferably, the end of the positioning plate five is provided with two positioning grooves, which are used to position the steel column.

[0017] Preferably, the clamping device includes clamping device one, clamping device two, clamping device three, clamping device four, and clamping device five. Clamping device one is used to clamp the ear plate four, clamping device two is used to clamp the ear plate two, clamping device three is used to clamp the welded assembly of the rear inner liner plate and the rear main support plate and the ear plate three, clamping device four is used to clamp the welded assembly of the rear inner liner plate and the rear main support plate and the ear plate one, and clamping device five is used to clamp the leveling mounting plate.

[0018] Preferably, the clamping device three includes a clamping device, a clamping plate, a pin, and a support base two. The clamping device is mounted on the support base two, and the clamping plate is hinged to the clamping device through the pin.

[0019] The beneficial effects of this utility model are: by combining the positioning device, positioning pin and clamping device to clamp and position each part to be welded, the accuracy of the relative position of each part to be welded is ensured, the welding quality is guaranteed, the operation is simple, time and labor are saved, the welding quality of the rear bracket is improved and the welding efficiency is increased. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the welding fixture of this utility model;

[0021] Figure 2 This is a schematic diagram of the welding fixture of this utility model from another angle.

[0022] Figure 3 This is a schematic diagram of the positioning pin device of this utility model;

[0023] Figure 4 This is a schematic diagram of the combined positioning device of this utility model;

[0024] Figure 5 This is a three-dimensional schematic diagram of the second combined positioning device of this utility model;

[0025] Figure 6 This is a front view of the second combined positioning device of this utility model;

[0026] Figure 7 This is a three-dimensional schematic diagram of the combined positioning device three of this utility model.

[0027] Figure 8 This is a side view of the combined positioning device three of this utility model;

[0028] Figure 9 This is a schematic diagram of the clamping device three of this utility model;

[0029] Figure 10 This is a schematic diagram of the rear support bracket;

[0030] Figure 11 This is a schematic diagram of the rear support from another angle;

[0031] Figure 12 This is a schematic diagram illustrating the use of this utility model.

[0032] The attached diagram is labeled as follows: 1. Support plate; 2. Positioning pin device one; 19. Positioning pin three; 1901. Positioning hole one; 20. Positioning cylindrical surface; 21. Fixing plate one; 22. Positioning sleeve two; 23. Type I adjusting reference block; 24. Positioning assembly surface;

[0033] 3. Combination positioning device one; 25. Fixing plate two; 26. Positioning plate one; 27. Positioning plate two; 28. Positioning pin four; 29. ​​Transition plate; 30. Positioning surface three; 31. Positioning surface four; 32. Positioning surface five; 33. Two-hole positioning block; 34. Positioning surface six; 35. Magnet;

[0034] 4. Combination positioning device two; 36. Fixing plate three; 37. Positioning plate three; 3701. Positioning surface seven; 38. Positioning plate four; 3801. Positioning surface eight;

[0035] 5. Combined positioning device three; 39. Positioning plate five; 40. Fixing plate four; 41. Positioning groove; 42. Support base one; 43. Positioning pin five; 44. Positioning pin six;

[0036] 6. Clamping device one; 7. Clamping device two;

[0037] 8. Clamping device three; 45. Clamping device; 46. Clamping plate; 47. Pin; 48. Support base two; 49. Support base three;

[0038] 9. Clamping device four; 10. Clamping device five; 11. Positioning sleeve one; 12. Positioning movable block; 13. Positioning bolt; 14. Positioning pin one; 15. Positioning pin two; 16. Support leg; 17. Directional wheel; 18. Brake swivel wheel;

[0039] 100. Rear inner lining plate; 101. Rear main support plate; 102. Connecting shaft; 103. Leveling mounting plate; 104. Leveling connecting sleeve; 105. Upper plate; 106. Steel column; 107. Ear plate one; 108. Ear plate two; 109. Ear plate three; 110. Ear plate four; 111. Rib plate; 112. Positioning hole two. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0042] Reference Figures 1 to 12As shown, this utility model discloses a welding fixture for the rear support of a rice transplanter, including a support plate 1 and a positioning pin device 1 2, a combined positioning device 1 3, a combined positioning device 2 4, a combined positioning device 3 5, a positioning sleeve 11, a positioning block 12, a positioning pin 14, and multiple pressing devices installed on the support plate 1. The combined positioning device 1 3 and the combined positioning device 2 4 cooperate to support the rear main support plate 101. The positioning sleeve 11 is used to position the rear inner liner plate 100 and the rear main support plate 101. The positioning block 12 is used to support the rear inner liner plate 100 and press the rear main support plate 101. The positioning pin device 1 2 is used to position the connecting shaft 102.

[0043] The combined positioning device 3 is used to clamp the ear plate 3 109, the ear plate 4 110 and the stiffening plate 111;

[0044] The combined positioning device 24 is used to clamp ear plate 107 and ear plate 2108;

[0045] The combined positioning device 35 is used to clamp the leveling mounting plate 103, the leveling connecting sleeve 104, and the steel column 106.

[0046] The positioning pin 14 is used to position the upper plate 105;

[0047] Multiple clamping devices are used to clamp the workpiece to be welded.

[0048] The clamping device includes clamping device 6, clamping device 7, clamping device 8, clamping device 9, and clamping device 10. Clamping device 6 and clamping device 7 are located on one side of the rear main support plate 101, and clamping device 8, clamping device 4, and clamping device 10 are located on the other side of the rear main support plate 101. Clamping device 6 is used to clamp the ear plate 4 110, clamping device 7 is used to clamp the ear plate 2 108, clamping device 8 is used to clamp the welded assembly of the rear inner liner plate 100 and the rear main support plate 101 and the ear plate 3 109, and clamping device 9 is used to clamp the welded assembly of the rear inner liner plate 100 and the rear main support plate 101 and the ear plate 107.

[0049] The clamping device 38 includes a clamping device 45, a clamping plate 46, a pin 47, and a support base 2 48. The clamping device 45 is mounted on the support base 2 48 via the support base 3 49. The clamping plate 46 is hinged to the clamping device 45 via the pin 47. The clamping plate 46 clamps the welded assembly of the rear inner liner plate 100 and the rear main support plate 101, as well as the ear plate 3 109. Since the clamping plate 46 is hinged to the clamping device 45 via the pin 47, the angle of the clamping plate 46 can be adjusted appropriately, thereby reducing the restriction on the height of the ear plate 3 109 and the welded assembly of the rear inner liner plate 100 and the rear main support plate 101, and improving the convenience and flexibility of use. Furthermore, the clamping plate 46 includes two clamping plates that form a U-shape with the opening facing downwards. One of the clamping plates 46 has an inclined surface, the inclination angle of which corresponds to the inclination angle of the upper inclined surface of the ear plate 3 109, to ensure the clamping effect on the ear plate 3 109.

[0050] The structure of the clamping plate 46 of clamping device 1 6, clamping device 2 7, clamping device 4 9 and clamping device 5 10 is adapted, and the remaining structures are the same as those of clamping device 3 8, which will not be described in detail here.

[0051] Furthermore, four support legs 16 are installed below the support plate 1. Two of the support legs 16 are equipped with directional wheels 17 at their lower ends, and the other two support legs 16 are equipped with brake casters 18, which facilitates the movement of the welding fixture and allows it to be stably stopped in a designated position, thus improving the convenience of use.

[0052] Reference Figure 3 As shown, specifically, the positioning pin device 2 includes a positioning pin 3 19 and a positioning sleeve 22. The positioning pin 3 19 is mounted on a fixing plate 1 21, which is mounted on a support plate 1. I-shaped adjustment reference blocks 23 are provided on adjacent sides of the fixing plate 1 21. Multiple shims are provided between the I-shaped adjustment reference blocks 23 and the fixing plate 1 21. By adjusting the number of shims, the positions of the fixing plate 1 21 and the positioning pin 3 19 can be adjusted, improving ease of use. The positioning pin 3 19 has a positioning assembly surface 24, and the positioning sleeve 11 is detachably mounted on the positioning assembly surface 24. The lower end of the positioning sleeve 22 is provided with a positioning cylindrical surface 20. The positioning sleeve 22 is threaded onto the positioning pin 3 19 and presses the positioning sleeve 11 with the positioning cylindrical surface 20. The positioning sleeve 11 is used to cooperate with the arc-shaped groove at the end of the rear main support plate 101 and the rear inner liner plate 100. The combined positioning device 1 3 and the combined positioning device 2 4 both include a two-hole positioning block 33. The two-hole positioning block 33 is used to support the rear main support plate 101, realize the positioning of the rear main support plate 101 with one pin on multiple surfaces, ensure the accuracy of the position of the rear main support plate 101, and ensure the welding quality.

[0053] Reference Figure 1 and Figure 4 As shown, clamping device 6 is located on one side of combined positioning device 3, and clamping device 8 is located on the other side of combined positioning device 3. Combined positioning device 3 includes positioning plate 26 and positioning plate 27. Positioning plate 26 and positioning plate 27 are mounted on support plate 1 via fixing plate 25. A transition plate 29 is provided between positioning plate 26 and positioning plate 27. Positioning plate 26 has positioning surface 32 and a magnet 35, and positioning plate 27 has positioning surface 34 and a magnet 35. Positioning surface 32 and positioning surface 34 are located on both sides of the two-hole positioning block 33. Positioning surface 32 and positioning surface 34 support the two stiffener plates 111, and the magnet 35 attracts the stiffener plates 111. The cooperation of the positioning surfaces and the magnet 35 ensures the stability and firmness of the stiffener plates 111 clamping, guaranteeing welding quality.

[0054] The combined positioning device 3 further includes a positioning pin 28, a positioning surface 30, and a positioning surface 31. The positioning surface 30 is used to support the ear plate 109, the positioning surface 31 is used to support the ear plate 110, and the positioning pin 28 is used to position the ear plate 109 and the ear plate 110. By cooperating with the positioning surface and the positioning pin, the ear plate 109 and the ear plate 110 are supported and positioned, ensuring welding quality and positional accuracy. No manual tightening is required, saving time and effort.

[0055] Furthermore, clearance grooves are provided between positioning surface 30 and positioning surface 5 32, and between positioning surface 4 31 and positioning surface 6 34. The ends of ear plate 3 109 and ear plate 4 110 are located in the clearance grooves to ensure stable clamping of ear plate 3 109 and ear plate 4 110.

[0056] Furthermore, a receiving space is provided between positioning plate 1 26 and positioning plate 27, and positioning pin 3 19 of positioning pin device 1 2 is located within the receiving space, making the structure more compact and reducing the floor space occupied.

[0057] Furthermore, multiple shims are provided between positioning plate 1 26 and positioning plate 27 and transition plate 29, and between fixing plate 25 and support plate 1. By adjusting the number of shims, the position and height of positioning surface 30 and positioning surface 4 31 can be adjusted to ensure the supporting function of ear plate 3 109 and ear plate 4 110 and improve the convenience of use.

[0058] Reference Figure 1 , Figure 5 and Figure 6As shown, the second combination positioning device 4 is located between the first combination positioning device 3 and the third combination positioning device 5. The second clamping device 7 is located on one side of the second combination positioning device 4, and the fourth clamping device is located on the other side of the second combination positioning device 4. The second combination positioning device 4 includes a fourth positioning pin 28, a third positioning plate 37, and a fourth positioning plate 38. A transition plate 29 is provided between the third positioning plate 37 and the fourth positioning plate 38. The third positioning plate 37 and the fourth positioning plate 38 are mounted on the support plate 1 by a third fixing plate 36. The third positioning plate 37 is provided with a positioning surface 3701 and a positioning hole, and the fourth positioning plate 38 is provided with a positioning surface 3701 and a positioning hole. Positioning surface 3801 and positioning hole, positioning surface 3701 and positioning surface 3801 are located on both sides of the two-hole positioning block 33. Positioning surface 3701 is used to support ear plate 2 108, and positioning surface 3801 is used to support ear plate 1 107. There are two positioning pins 28. Positioning pins 28 are used to position ear plate 1 107 and ear plate 2 108. Positioning pins 28 pass through ear plate 1 107 and ear plate 2 108 and are inserted into the positioning holes on positioning plate 3 37 and positioning plate 4 38 to realize the positioning of ear plate 1 107 and ear plate 2 108.

[0059] Furthermore, multiple shims are provided between positioning plate 37 and positioning plate 48 and transition plate 29, and between fixing plate 25 and support plate 1, to adjust the position and height of positioning surface 7 3701 and positioning surface 8 3801, ensuring the adjustment of the position of ear plate 1 107 and ear plate 2 108, and guaranteeing welding quality.

[0060] Reference Figure 7 As shown, the combined positioning device 35 includes a positioning plate 39, a positioning pin 43, and a positioning pin 44. The positioning plate 39 is mounted on the support plate 1 via a support base 42. The positioning plate 39 supports the leveling mounting plate 103. The positioning plate 39 is inclined, and the inclination angle of the positioning plate 39 corresponds to the inclination angle of the leveling mounting plate 103, ensuring the accuracy of the relative position between the leveling mounting plate 103 and the rear main support plate 101 and ensuring welding quality. The positioning pins 43 and 44 are used to position the leveling mounting plate 103 and the leveling connecting sleeve 104. Specifically, the positioning pin 44 is inserted into the leveling mounting plate 103 and the leveling connecting sleeve 104, and the positioning pin 43 is installed in the positioning hole 112 of the leveling mounting plate 103, ensuring the firmness of the positioning of the leveling mounting plate 103 and the leveling connecting sleeve 104 and ensuring welding quality.

[0061] Furthermore, the end of the positioning plate 39 is provided with two positioning grooves 41, which are used to position two steel columns 106, with one positioning groove 41 corresponding to one steel column 106. The positioning grooves 41 are V-shaped grooves and are inclined. The inclination angle of the positioning grooves 41 corresponds to the inclination angle of the steel column 106 to be welded, ensuring that the steel column 106 is welded onto the leveling mounting plate 103 as required.

[0062] The usage process of this utility model is as follows:

[0063] First, place the positioning sleeve 11 on the positioning assembly surface 24 of the positioning pin 3 19 of the positioning pin device 12, and then screw in the positioning sleeve 22. Use the positioning cylindrical surface 20 to fix and press the positioning sleeve 11 in place.

[0064] Place the rear main support plate 101 onto the two-hole positioning block 33 of the combined positioning device 1 and the two-hole positioning block 33 of the combined positioning device 2. The outer cylindrical surface of the positioning sleeve 11 positions the arc-shaped groove at the end of the main support plate 101.

[0065] Place the positioning block 12 on the rear main support plate 101, pass the positioning bolt 13 through the positioning hole 1901 on the positioning pin 19, and screw it into the screw hole of the positioning block 12 to fix the positioning block 12. The positioning block 12 presses the rear main support plate 101.

[0066] One end of the rear inner liner plate 100 is placed on the rear main support plate 101, and the other end of the rear inner liner plate 100 is placed on the positioning block 12. The outer cylindrical surface of the positioning sleeve 11 positions the arc groove at the end of the rear inner liner plate 100. The rear inner liner plate 100 and the rear main support plate 101 are welded together according to the product drawing to form a welded assembly of the rear inner liner plate 100 and the rear main support plate 101.

[0067] Then loosen the positioning bolt 13, unscrew the positioning sleeve 22, remove the welded assembly of the rear main support plate 101 and the rear inner liner plate 100, and remove the positioning sleeve 11 and the positioning movable block 12.

[0068] Place the connecting shaft 102 on the positioning assembly surface 24 of the positioning pin 3 19 of the positioning pin device 1 2, and then screw in the positioning sleeve 2 22. Use the positioning cylindrical surface 20 to fix and press the connecting shaft 102.

[0069] Then, the welded assembly of the rear main support plate 101 and the rear inner liner plate 100 is placed on the two-hole positioning block 33 of the combined positioning device 1 and the two-hole positioning block 33 of the combined positioning device 2. The outer cylindrical surface of the connecting shaft 102 is used to position the arc groove of the rear main support plate 101 and the rear inner liner plate 100.

[0070] Then place ear plate 107 on positioning surface 3801 of combined positioning device 24, place ear plate 208 on positioning surface 3701 of combined positioning device 24, and insert two positioning pins 28 through ear plate 107 and ear plate 208 into the hole of combined positioning device 2 to position ear plate 107 and ear plate 208.

[0071] Then place ear plates 3109 and 410 on positioning surfaces 30 and 31 of the combined positioning device 3, respectively, and insert two positioning pins 428 through ear plates 3109 and 410 into the holes of the combined positioning device 3 to position ear plates 3109 and 410.

[0072] Then place the two stiffener plates 111 on the positioning surfaces 32 and 34 of the combined positioning device 3, and use magnets 35 to attract them respectively.

[0073] Then operate clamping device 16 to clamp ear plate 410; operate clamping device 38 to clamp ear plate 3109, rear main support plate 101, and rear inner liner plate 100 welded components with clamping plate 46.

[0074] Operate clamping device 2 7 to clamp ear plate 2 108; operate clamping device 4 9 to clamp ear plate 1 107, rear main support plate 101, and rear inner liner plate 100 welded components with clamping plate 46.

[0075] Then the two steel columns 106 are placed in the two positioning slots 41 of the combined positioning device 35 for positioning.

[0076] Place the leveling mounting plate 103 on the positioning plate 39 of the combined positioning device 35. Place the leveling connecting sleeve 104 on the leveling mounting plate 103 and insert it into the hole of the leveling mounting plate 103. Use positioning pins 43 and 44 to insert into the holes of the leveling mounting plate 103 and the leveling connecting sleeve 104, and also insert them into the hole of the positioning plate 39 to position the leveling mounting plate 103 and the leveling connecting sleeve 104. Then operate the clamping device 10 to clamp the leveling mounting plate 103 to ensure the firmness of the clamping. Weld each component according to the drawing requirements.

[0077] After welding is completed, loosen the clamping device and remove all locating pins, then remove the welded workpiece from the welding fixture. Flip the welded leveling mounting plate 103 and place it on the locating plate 39. Two locating pins 14 are installed on the locating plate 39, and these pins 14 are inserted into the leveling mounting plate 103 and the upper mounting plate 105 to ensure the accurate positioning of the upper mounting plate 105, thus enabling the upper mounting plate 105 to be accurately welded onto the leveling mounting plate 103. The fixture usage process is now complete.

[0078] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for the rear support frame of a rice transplanter, characterized in that, It includes positioning pin device one (2), combined positioning device one (3), combined positioning device two (4), combined positioning device three (5), positioning sleeve one (11), positioning live block (12), positioning pin one (14) and multiple pressing devices, the combined positioning device one (3) and the combined positioning device two (4) are matched for supporting the rear main support plate (101), the positioning sleeve one (11) is used for positioning the rear inner lining plate (100) and the rear main support plate (101), the positioning live block (12) is used for supporting the rear inner lining plate (100) and pressing the rear main support plate (101), the positioning pin device one (2) is used for positioning the connecting shaft (102); The combined positioning device one (3) is used for clamping the ear plate three (109), the ear plate four (110) and the muscle plate (111); The combined positioning device two (4) is used for clamping the ear plate one (107) and the ear plate two (108); The combined positioning device three (5) is used for clamping the leveling mounting plate (103), the leveling connecting sleeve (104) and the steel column (106); The positioning pin one (14) is used for positioning the upper pasting plate (105); Multiple pressing devices are used for pressing the welding parts.

2. The welding jig for a transplanter rear support according to claim 1, wherein The positioning pin device one (2) includes positioning pin three (19) and positioning sleeve two (22), the positioning pin three (19) is provided with a positioning combination surface (24), the positioning sleeve one (11) is detachably installed on the positioning combination surface (24), the lower end of the positioning sleeve two (22) is provided with a positioning cylindrical surface (20), the positioning sleeve two (22) is used for pressing the positioning sleeve one (11) by the positioning cylindrical surface (20), the positioning sleeve one (11) is used for cooperating with the arc-shaped groove of the rear main support plate (101) and the rear inner lining plate (100), the combined positioning device one (3) and the combined positioning device two (4) both include two-hole positioning blocks (33), the two-hole positioning blocks (33) are used for supporting the rear main support plate (101).

3. The welding jig for the rear bracket of a rice transplanter according to claim 1, characterized in that, The combined positioning device two (4) includes positioning pin four (28), positioning plate three (37) and positioning plate four (38), the positioning plate three (37) is provided with a positioning surface seven (3701), the positioning plate four (38) is provided with a positioning surface eight (3801), the positioning surface seven (3701) is used for supporting the ear plate two (108), the positioning surface eight (3801) is used for supporting the ear plate one (107), the positioning pin four (28) is provided with two, and the positioning pin four (28) is used for positioning the ear plate one (107) and the ear plate two (108).

4. The welding jig for the rear bracket of a rice transplanter according to claim 1, characterized in that, The combined positioning device one (3) includes positioning plate one (26) and positioning plate two (27), the positioning plate one (26) is provided with a positioning surface five (32) and a magnet (35), the positioning plate two (27) is provided with a positioning surface six (34) and a magnet (35), the positioning surface five (32) and the positioning surface six (34) are used for supporting two muscle plates (111), and the magnets (35) are used for adsorbing the muscle plates (111).

5. The welding jig for the rear bracket of a rice transplanter according to claim 4, characterized in that, The combined positioning device one (3) further comprises a positioning pin four (28), a positioning surface three (30) and a positioning surface four (31), the positioning surface three (30) and the positioning surface four (31) are used to support the ear plate three (109) and the ear plate four (110), and the positioning pin four (28) is used to position the ear plate three (109) and the ear plate four (110).

6. The welding jig for the rear bracket of a rice transplanter according to claim 1, wherein The combined positioning device three (5) comprises a positioning plate five (39), a positioning pin five (43) and a positioning pin six (44), the positioning plate five (39) is used to support the leveling mounting plate (103), and the positioning pin five (43) and the positioning pin six (44) are used to position the leveling mounting plate (103) and the leveling connecting sleeve (104).

7. The welding jig for the rear bracket of a rice transplanter according to claim 6, wherein The end of the positioning plate five (39) is provided with two positioning grooves (41), and the positioning grooves (41) are used to position the steel column (106).

8. The welding tool for the rear bracket of a rice transplanter according to claim 1, wherein The pressing device comprises a pressing device one (6), a pressing device two (7), a pressing device three (8), a pressing device four (9) and a pressing device five (10), the pressing device one (6) is used to press the ear plate four (110), the pressing device two (7) is used to press the ear plate two (108), the pressing device three (8) is used to press the assembly of the rear inner lining plate (100) and the rear main support plate (101) and the ear plate three (109), the pressing device four (9) is used to press the assembly of the rear inner lining plate (100) and the rear main support plate (101) and the ear plate one (107), and the pressing device five (10) is used to press the leveling mounting plate (103).

9. The welding jig for the rear bracket of a rice transplanter according to claim 8, wherein The pressing device three (8) comprises a presser (45), a pressing plate (46), a pin shaft (47) and a support seat two (48), the presser (45) is installed on the support seat two (48), and the pressing plate (46) is hinged to the presser (45) through the pin shaft (47).

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