Gravity machine for manufacturing motorcycle hub

Abstract

The utility model relates to a gravity machine for manufacturing motorcycle hubs, which comprises a frame, a moving die guide mechanism, a pick-up mechanism, a product receiving mechanism and a lower ejection mechanism are mounted on the frame, the moving die guide mechanism is positioned above the pick-up mechanism, the product receiving mechanism is positioned below the pick-up mechanism, and the lower ejection mechanism is positioned above the moving die guide mechanism. And the lower ejection mechanism is positioned below the product receiving mechanism. According to the utility model, the lower ejection mechanism on the equipment drives the ejection mechanism on the mold to eject a product, the product is clamped from the lower part of the movable template through the taking mechanism, and the product receiving mechanism is rotated by a person, so that the product just falls onto the receiving disc, and the taking efficiency is greatly improved; and the product quality problem caused by improper piece taking is also avoided.

Description

Technical Field

[0001] The utility model relates to a gravity machine, in particular to a gravity machine for manufacturing motorcycle wheels, belonging to the technical field of mechanical manufacturing equipment. Background Art

[0002] The manufacturing methods of motorcycle wheels include forging, squeeze casting, low-pressure casting, gravity casting, etc., and gravity casting is a commonly used casting method in China. Gravity casting refers to the process of injecting molten aluminum into the cavity under the action of the earth's gravity. According to the different positions of the molten aluminum gate, it is divided into central pouring, side mold pouring, and double-side mold pouring. Among them, the hub blank formed by central pouring has a central pouring riser and an upper rim riser; the hub blank formed by side mold pouring has a side pouring riser, a central riser, and an upper rim riser; the hub blank formed by double-side mold pouring has a central riser, an upper rim riser, and two side pouring risers.

[0003] In the prior art, the gravity machine for manufacturing motorcycle wheels does not have a special part-taking mechanism and product-receiving mechanism, resulting in difficulties for operators to take out the products from the gravity machine after the manufacturing of motorcycle wheels is completed, and there are also occasional product quality problems caused by improper part-taking. In addition, the mold clamping mechanism in the prior art does not have a guide, and the oil cylinder can only be guided by the piston rod, resulting in the technical defect of oil leakage of the oil cylinder, which brings great disadvantages to production.

[0004] Based on this, the present utility model is proposed. Content of the Utility Model

[0005] Aiming at the above technical problems of the prior art, the purpose of the present utility model is to provide a gravity machine for manufacturing motorcycle wheels, which adds a part-taking mechanism and a product-receiving mechanism, facilitating the taking out of products after manufacturing and ensuring the product quality; a guide is added to the mold clamping mechanism to solve the problem of oil leakage of the oil cylinder.

[0006] To achieve the above purpose, the present utility model is realized by the following technical solutions:

[0007] A gravity machine for manufacturing motorcycle wheels includes a frame, on which a moving mold guiding mechanism, a part-taking mechanism, a product-receiving mechanism, and a lower ejecting mechanism are installed. The moving mold guiding mechanism is located above the part-taking mechanism, the product-receiving mechanism is located below the part-taking mechanism, and the lower ejecting mechanism is located below the product-receiving mechanism.

[0008] The moving die guiding mechanism described above includes a first oil cylinder push plate, a second oil cylinder push plate and a main oil cylinder. The main oil cylinder passes through the second oil cylinder push plate, and the output shaft of the main oil cylinder is connected to the first oil cylinder push plate. The first oil cylinder push plate and the second oil cylinder push plate are connected by a connecting column, and a moving die plate is connected to the lower end of the connecting column. Lifting guide columns are provided on both sides of the second oil cylinder push plate. The part-taking mechanism is connected to the lower ends of the lifting guide columns. Upper nuts and lower nuts are provided at the upper ends of the lifting guide columns. The upper nuts and the lower nuts are separated by a certain distance, and the second oil cylinder push plate is located between the upper nut and the lower nut.

[0009] The second oil cylinder push plate and the connecting column are locked by a locking nut.

[0010] The part-taking mechanism described above includes a mounting seat. A clamping block is provided below the mounting seat. The clamping block is connected to the output shaft of a part-taking air cylinder, and locking blocks are provided on both sides of the clamping block. The clamping block is guided by the locking blocks.

[0011] The part-taking air cylinder is provided with a connecting plate. Adjusting screws are provided on both sides of the connecting plate. One end of each adjusting screw is connected to a locking block, and an adjusting nut is provided at the other end of the adjusting screw. The connecting plate is located between the locking block and the adjusting nut and is limited by the locking block and the adjusting nut.

[0012] The product receiving mechanism described above includes a second guide rail frame. A first guide rail frame is connected above the second guide rail frame through a second guide rail slider. A first sliding frame is connected above the first guide rail frame through a first guide rail slider. A receiving tray is provided on the first sliding frame.

[0013] A first air cylinder is provided on the first guide rail frame. The end of the output shaft of the first air cylinder is provided with a first air cylinder connection head. The first air cylinder connection head is connected to the first sliding frame. A second air cylinder is provided on the second guide rail frame. The end of the output shaft of the second air cylinder is provided with a second air cylinder connection head. The second air cylinder connection head is located on the opposite side of the first air cylinder connection head and is connected to the first guide rail frame.

[0014] The lower ejecting mechanism described above includes a die fixing seat. An ejecting plate is provided above the die fixing seat. An ejecting clamping seat is provided on the ejecting plate. A connecting clamping block is provided in the ejecting clamping seat. The die is inserted into the ejecting clamping seat and locked by the connecting clamping block. An ejecting oil cylinder is provided below the die fixing seat. The output end of the ejecting oil cylinder passes through the die fixing seat and is connected to the ejecting plate. A plurality of ejecting guide columns are provided below the ejecting plate. The ejecting guide columns pass through the die fixing seat and move up and down on the die fixing seat.

[0015] The mold includes an upper plate and a lower plate. Above the upper plate is a product mounting seat. The lower plate is located above the mold fixing seat, and the lower plate is connected to a mold ejector plate through mold guide columns. Below the mold ejector plate is a mold connecting part, and the mold connecting part is inserted into an ejecting clamping seat and locked by a connecting block; above the mold ejector plate is a thimble mounting seat, and several thimbles are arranged on the thimble mounting seat. During operation, the thimbles pass through the upper plate to eject the product on the product mounting seat.

[0016] The connecting block is a U-shaped block and is locked to the mold by a locking screw.

[0017] The gravity machine for manufacturing motorcycle wheels of the present utility model has the following beneficial effects:

[0018] 1. In the present utility model, the part picking mechanism drives the clamping block through a part picking cylinder, and clamps the product below the moving template through the clamping blocks on both sides of the moving template, which is very convenient to use.

[0019] 2. In the present utility model, through the settings of the first guide rail frame and the second guide rail frame of the product receiving structure, the first guide rail frame can slide on the second guide rail frame, and the first sliding frame can slide on the first guide rail frame, and the sliding directions of the first sliding frame and the first guide rail frame are opposite, so that the receiving tray can receive the product within a large range.

[0020] 3. When in use, the lower ejecting mechanism in the present utility model clamps the mold through the connecting block and locks it with a locking screw, improving the stability of the mold in the lower ejecting mechanism. Moreover, compared with the oil leakage phenomenon of the oil cylinder in the prior art due to the fact that the oil cylinder can only be guided by the piston rod, the present utility model is provided with ejecting guide columns below the ejector plate, greatly reducing the burden on the piston rod and effectively avoiding oil leakage of the oil cylinder.

[0021] The present utility model drives the ejecting mechanism on the mold to eject the product through the lower ejecting mechanism on the equipment, clamps the product below the moving template through the part picking mechanism, and rotates the product receiving mechanism by the operator, so that the product just falls onto the receiving tray, greatly improving the part picking efficiency and also avoiding the existence of product quality problems caused by improper part picking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view structural schematic diagram of the present utility model;

[0023] Figure 2 is the side view structural schematic diagram of the present utility model;

[0024] Figure 3 is the top view structural schematic diagram of the present utility model;

[0025] Figure 4Schematic diagram of the positional relationship between the moving die guiding mechanism and the part-taking mechanism in the present utility model;

[0026] Figure 5 Schematic diagram of the structure of the part-taking mechanism in the present utility model;

[0027] Figure 6 Schematic diagram of the structure of the product receiving mechanism in the present utility model;

[0028] Figure 7 Schematic diagram of the structure of the product receiving mechanism at position A in the present utility model;

[0029] Figure 8 Schematic diagram of the structure of the product receiving mechanism at position B in the present utility model;

[0030] Figure 9 Schematic diagram of the structure of the product receiving mechanism at position C in the present utility model;

[0031] Figure 10 Schematic diagram of the structure of the lower ejecting mechanism in the present utility model;

[0032] Figure 11 Side view schematic diagram of the lower ejecting mechanism in the present utility model;

[0033] Figure 12 Schematic diagram of the structure of the mold in the present utility model;

[0034] Figure 13 Schematic diagram of the mold of the present utility model installed on the lower ejecting mechanism;

[0035] Figure 14 Cross-sectional structure schematic diagram of the mold of the present utility model installed on the lower ejecting mechanism;

[0036] Wherein, 1 is the frame;

[0037] 2 is the moving die guiding mechanism: 21 is the first oil cylinder push plate, 22 is the second oil cylinder push plate, 23 is the main oil cylinder, 24 is the connecting column, 25 is the moving template, 26 is the lifting guide post, 27 is the upper nut, 28 is the lower nut, 29 is the locking nut, 210 is the main oil cylinder output shaft;

[0038] 3 is the part-taking mechanism: 31 is the mounting seat, 32 is the pressing block, 33 is the clamping block, 34 is the part-taking cylinder, 35 is the part-taking cylinder output shaft, 36 is the connecting plate, 37 is the adjusting screw, 38 is the adjusting nut, 39 is the guide sleeve;

[0039] 4 is the product receiving mechanism: 41 is the second guide rail frame, 42 is the second guide rail slider, 43 is the first guide rail frame, 44 is the first guide rail slider, 45 is the first sliding frame, 46 is the receiving plate, 47 is the first cylinder, 48 is the first cylinder connector, 49 is the second cylinder, 410 is the second cylinder connector, 411 is the first connecting block, 412 is the second connecting block;

[0040] 5 is the lower ejection mechanism: 51 is the mold fixing seat, 52 is the ejection plate, 53 is the ejection clamping seat, 54 is the connecting block, 55 is the ejection oil cylinder, 56 is the ejection guide post, 57 is the upper plate, 58 is the lower plate, 59 is the product mounting seat, 510 is the mold ejection plate, 511 is the mold connecting piece, 512 is the ejector pin mounting seat, 513 is the ejector pin, 514 is the mold guide post, 515 is the locking screw, 516 is the cushion post, 517 is the ejection oil cylinder output shaft;

[0041] 6 is the water receiving tray: 61 is the water drainage port of the water receiving tray;

[0042] 7 is the anchor bolt, 8 is the operation box, 9 is the cooling mechanism, 10 is the hydraulic block / solenoid valve, 11 is the workbench plate, 12 is the product. Detailed implementation mode

[0043] The following further illustrates the present utility model with specific embodiments, but the protection scope of the present utility model is not limited thereto.

[0044] As Figures 1-3 shown, the gravity machine of the present utility model for manufacturing motorcycle wheels includes a frame 1, on which a hydraulic block / solenoid valve 10, a cooling mechanism 9, a moving mold guiding mechanism 2, a part picking mechanism 3, a product receiving mechanism 4 and a lower ejection mechanism 5 are installed. The moving mold guiding mechanism 2 is located above the part picking mechanism 3, the product receiving mechanism 4 is located below the part picking mechanism 3, and the lower ejection mechanism 5 is located below the product receiving mechanism 4. The above mechanisms are all operated through the operation box 8. Below the lower ejection mechanism 5, there is also a water receiving tray 6 with a water drainage port 61 of the water receiving tray. The bottom of the water receiving tray 6 is fixed by 4 groups of anchor bolts 7.

[0045] The innovative points of the present utility model lie in the moving mold guiding mechanism 2, the part picking mechanism 3, the product receiving mechanism 4 and the lower ejection mechanism 5. The following details the specific structures, connection relationships and working principles of the moving mold guiding mechanism 2, the part picking mechanism 3, the product receiving mechanism 4 and the lower ejection mechanism 5. However, the other structures, connection relationships and working principles of the gravity machine for manufacturing motorcycle wheels of the present utility model are all common knowledge in the art, as recorded in the utility model patent with the publication number CN202824540U, and will not be elaborated here.

[0046] Preferably, as Figure 4 and 5As shown in the figure, the moving die guiding mechanism 2 in the present utility model works in cooperation with the part-taking mechanism 3. Among them, the moving die guiding mechanism 2 includes an oil cylinder push plate 21, an oil cylinder push plate 22 and a main oil cylinder 23. The main oil cylinder 23 passes through the oil cylinder push plate 22, and the output shaft 210 of the main oil cylinder is connected to the oil cylinder push plate 21. The oil cylinder push plate 21 and the oil cylinder push plate 22 are connected by a connecting column 24, and they are locked with the connecting column 24 by a locking nut 29. The lower end of the connecting column 24 is connected with a moving template 25, and below the moving template 25 is the product 12; lifting guide columns 26 are arranged on both sides of the oil cylinder push plate 22. Upper nuts 27 and lower nuts 28 are arranged at the upper ends of the lifting guide columns 26. The upper nuts 27 and the lower nuts 28 are separated by a certain distance, and the oil cylinder push plate 22 is located between the upper nut 27 and the lower nut 28, that is, the distance between the upper nut 27 and the lower nut 28 is the stroke of the oil cylinder push plate 22.

[0047] The part-taking mechanism 3 includes a mounting seat 31. The lifting guide columns 26 are connected to the mounting seat 31 through pressing blocks 32, that is, the lower ends of the lifting guide columns 26 on both sides of the oil cylinder push plate 22 are connected with the mounting seat 31. Two guide sleeves 39 are also arranged on the mounting seat 31, and the lifting guide columns 26 are located between the two guide sleeves 39. A clamping block 33 is arranged below the mounting seat 31, that is, there are also two clamping blocks 33, and the positions of the two clamping blocks 33 match the moving template 25, so that the two clamping blocks 33 can just pick up the product 12 below the moving template 25.

[0048] The clamping block 33 is connected to the output shaft 35 of the part-taking air cylinder, and locking blocks 36 are arranged on both sides of the clamping block 33. A guide groove is formed in the middle of the locking block 36, and the clamping block 33 moves in the guide groove, that is, the clamping block 33 is guided by the locking block 36.

[0049] When the mold is opened, the main oil cylinder 23 pushes the oil cylinder push plate 21 upward, and at the same time drives the oil cylinder push plate 22 upward, thereby driving the moving template 25 upward. When the oil cylinder push plate 22 moves to contact the upper nut 27, it will drive the left and right two lifting guide columns 26 upward. At this time, the moving template 25 has moved upward by a certain distance, and this distance is the distance between the upper nut 27 and the lower nut 28, and this distance can be adjusted according to the height of the installed mold. At this time, the part-taking air cylinder 34 of the part-taking mechanism 3 works, and the output shaft 35 of the part-taking air cylinder pushes the clamping block 33 to clamp the product from the left and right sides of the product 12 to prevent the product 12 from falling.

[0050] More preferably, the part-taking air cylinder 34 in the present utility model is provided with a connecting plate 36. Adjusting screws 37 are arranged on both sides of the connecting plate 36. One end of the adjusting screw 37 is connected to the locking block 36, and an adjusting nut 38 is arranged at the other end of the adjusting screw 37. The connecting plate 36 is located between the locking block 36 and the adjusting nut 38, and the clamping range of the left and right clamping blocks 33 is adjusted by the adjusting screw 37 and the adjusting nut 38.

[0051] Further provided, such as Figures 6-9 As shown, the product receiving mechanism 4 in the present utility model includes a second guide rail frame 41. Above the second guide rail frame 41, a first guide rail frame 43 is connected through a second guide rail slider 42, and the first guide rail frame 43 is connected to the second guide rail slider 42 through a second connecting block 412. Above the first guide rail frame 43, a first sliding frame 45 is connected through a first guide rail slider 44, and the first sliding frame 45 is connected to the first guide rail slider 44 through a first connecting block 411. A receiving tray 46 is provided on the first sliding frame 45. A first cylinder 47 is provided on the first guide rail frame 43. At the end of the output shaft of the first cylinder 47, a first cylinder connecting head 48 is provided, and the first cylinder connecting head 48 is connected to the first sliding frame 45; a second cylinder 49 is provided on the second guide rail frame 41. At the end of the output shaft of the second cylinder 49, a second cylinder connecting head 410 is provided. The second cylinder connecting head 410 is located on the opposite side of the first cylinder connecting head 48, and the second cylinder connecting head 410 is connected to the first guide rail frame 43, so that the first sliding frame 45 and the first guide rail frame 43 move in different directions, expanding the position for receiving products.

[0052] The product receiving mechanism 4 in the present utility model is driven by cylinders. A total of 2 cylinders are configured, and the receiving tray 46 can be stopped at 3 different work positions. Among them, 1 cylinder driving mechanism is configured on the upper layer of the product receiving mechanism 4, that is, the first cylinder 47. When the first cylinder 47 moves, the first sliding frame 45 makes a linear motion on the first guide rail frame 43 through the first guide rail slider 44. When the stroke of the first cylinder 47 is completed, the receiving tray 46 reaches the designated position A as shown in Figure 7 Above part constitutes the upper structure of the product receiving mechanism 4. When the first cylinder 47 retracts, the receiving tray 46 reaches the standby position B as shown in Figure 8 1 cylinder driving mechanism is configured on the lower layer of the product receiving mechanism 4, that is, the second cylinder 49. When the second cylinder 49 moves, the first guide rail frame 43 makes a linear motion on the second guide rail frame 41 through the second guide rail slider 42 (i.e., the entire upper mechanism). When the stroke of the second cylinder 49 is completed, the receiving tray 46 reaches the designated position C as shown in Figure 9

[0053] Further provided, such as Figures 10-14 As shown, the lower ejection mechanism 5 in the present utility model includes a mold fixing base 51. Below the mold fixing base 51, a plurality of cushion columns 516 are provided, and the cushion columns 516 are located outside the ejection oil cylinder 55. Above the mold fixing base 51, an ejection plate 52 is provided. On the ejection plate 52, an ejection clamping seat 53 is provided. Inside the ejection clamping seat 53, a connecting clamping block 54 is provided. Below the mold fixing base 51, an ejection oil cylinder 55 is provided. The output end 517 of the ejection oil cylinder passes through the mold fixing base 51 and is connected to the ejection plate 52. And below the ejection plate 52, a plurality of ejection guide columns 56 are provided. The ejection guide columns 56 pass through the mold fixing base 51 and move up and down on the mold fixing base 51.

[0054] ​The mold includes an upper plate 57 and a lower plate 58. The upper plate 57 is installed on the workbench plate 11, and above the upper plate 57 is the product mounting seat 59. The lower plate 58 is located above the mold fixing seat 51, and the lower plate 58 is connected with a mold ejector plate 510 through a mold guide post 514. Below the mold ejector plate 510 is provided with a mold connecting part 511. The mold connecting part 511 is inserted into the ejector clamping seat 53 and locked by a connecting block 54. The connecting block 54 is a U-shaped block and is locked with the mold connecting part 511 by a locking screw 515 to prevent the connecting block 54 from disengaging during movement, further increasing the stability of the mold on the lower ejecting mechanism 5. Above the mold ejector plate 510 is provided with a thimble mounting seat 512, and a number of thimbles 513 are provided on the thimble mounting seat 512.

[0055] During operation, the ejecting oil cylinder 55 is driven, and the output shaft 517 of the ejecting oil cylinder pushes the ejector plate 52 to move up and down. The ejector plate 52 is guided by the ejecting guide post 56, without using the piston of the oil cylinder as the guide, avoiding the occurrence of oil leakage of the oil cylinder. The ejector plate 52 drives the ejector clamping seat 53 and the connecting block 54 to move. At this time, the mold ejecting part fixed to the connecting block 54 synchronously performs an ejecting movement, that is, the mold ejector plate 510 moves up and down guided by the mold guide post 514, driving the thimble mounting seat 512, and thus driving the thimbles 513, so that the thimbles 513 pass through the upper plate 57 to eject the product 12 on the product mounting seat 59.

[0056] The utility model drives the ejecting mechanism on the mold to eject the product 12 through the lower ejecting mechanism 5 on the equipment. Through the cooperation of the moving mold guiding mechanism 2 and the part picking mechanism 3, the product is clamped below the moving template 25, and by rotating the product receiving mechanism 3 by the operator, the product just falls onto the receiving tray 46, greatly improving the part picking efficiency and also avoiding the existence of product quality problems caused by improper part picking.

[0057] The above embodiments are only used to explain the inventive concept of the utility model, rather than limiting the protection scope of the rights of the utility model. Any non-substantive modification made to the utility model using this concept shall fall within the protection scope of the utility model.

Claims

1. A gravity machine for manufacturing motorcycle wheels, comprising a frame, characterized in that: A moving die guiding mechanism, a part picking mechanism, a product receiving mechanism and a lower ejecting mechanism are installed on the frame. The moving die guiding mechanism is located above the part picking mechanism, the product receiving mechanism is located below the part picking mechanism, and the lower ejecting mechanism is located below the product receiving mechanism.

2. The gravity machine for manufacturing motorcycle wheels according to claim 1, wherein: The moving die guiding mechanism includes a first oil cylinder push plate, a second oil cylinder push plate and a main oil cylinder. The main oil cylinder passes through the second oil cylinder push plate, and the output shaft of the main oil cylinder is connected to the first oil cylinder push plate. The first oil cylinder push plate and the second oil cylinder push plate are connected by connecting columns, and a moving die plate is connected to the lower end of the connecting columns. Lifting guide columns are arranged on both sides of the second oil cylinder push plate. The part picking mechanism is connected to the lower ends of the lifting guide columns. Upper nuts and lower nuts are arranged at the upper ends of the lifting guide columns. The upper nuts and the lower nuts are separated by a certain distance, and the second oil cylinder push plate is located between the upper nuts and the lower nuts.

3. The gravity machine for manufacturing motorcycle wheels according to claim 2, wherein: The second oil cylinder push plate and the connecting columns are locked by locking nuts.

4. The gravity machine for manufacturing motorcycle wheels according to claim 2, wherein: The part picking mechanism includes a mounting seat. A clamping block is arranged below the mounting seat. The clamping block is connected to the output shaft of a part picking air cylinder. Locking blocks are arranged on both sides of the clamping block, and the clamping block is guided by the locking blocks.

5. The gravity machine for manufacturing motorcycle wheels according to claim 4, characterized in that: The part picking air cylinder is provided with a connecting plate. Adjusting screws are arranged on both sides of the connecting plate. One end of each adjusting screw is connected to a locking block, and an adjusting nut is arranged at the other end of each adjusting screw. The connecting plate is located between the locking blocks and the adjusting nuts and is limited by the locking blocks and the adjusting nuts.

6. The gravity machine for manufacturing motorcycle wheels according to claim 1, characterized in that: The product receiving mechanism includes a second guide rail frame. A first guide rail frame is connected above the second guide rail frame through second guide rail sliders. A first sliding frame is connected above the first guide rail frame through first guide rail sliders. A receiving tray is arranged on the first sliding frame.

7. The gravity machine for manufacturing motorcycle wheels as described in claim 6, characterized in that: A first air cylinder is arranged on the first guide rail frame. A first air cylinder connecting head is arranged at the end of the output shaft of the first air cylinder. The first air cylinder connecting head is connected to the first sliding frame. A second air cylinder is arranged on the second guide rail frame. A second air cylinder connecting head is arranged at the end of the output shaft of the second air cylinder. The second air cylinder connecting head is located on the opposite side of the first air cylinder connecting head and is connected to the first guide rail frame.

8. The gravity machine for manufacturing motorcycle wheels according to claim 1, characterized in that: The lower ejecting mechanism includes a mold fixing seat. An ejecting plate is arranged above the mold fixing seat. An ejecting clamping seat is arranged on the ejecting plate. A connecting clamping block is arranged in the ejecting clamping seat. The mold is inserted into the ejecting clamping seat and locked by the connecting clamping block. An ejecting oil cylinder is arranged below the mold fixing seat. The output end of the ejecting oil cylinder passes through the mold fixing seat and is connected to the ejecting plate. A plurality of ejecting guide columns are arranged below the ejecting plate. The ejecting guide columns pass through the mold fixing seat and move up and down on the mold fixing seat.

9. The gravity machine for manufacturing motorcycle wheels according to claim 8, characterized in that: The mold includes an upper plate and a lower plate. A product mounting seat is arranged above the upper plate. The lower plate is located above the mold fixing seat. The lower plate is connected to a mold ejecting plate through mold guide columns. A mold connecting part is arranged below the mold ejecting plate. The mold connecting part is inserted into the ejecting clamping seat and locked by the connecting clamping block. A thimble mounting seat is arranged above the mold ejecting plate. A plurality of thimbles are arranged on the thimble mounting seat. During operation, the thimbles pass through the upper plate to eject the product on the product mounting seat.

10. The gravity machine for manufacturing motorcycle wheels according to claim 8 or 9, characterized in that: The connecting clamping block is a U-shaped clamping block and is locked to the mold by locking screws.

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