Steering gear support casting system and process
By designing sealing blocks and spring mechanisms in the directional bracket casting system, the pressure inside the cavity is increasing, the problem formed by the bubbles in the bracket, and improved the surface quality of the bracket and the accuracy of the installation hole.
Patent Information
- Application Number
- CN202411722721.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-01-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the casting process of the direction machine bracket, the bubbles are trapped during the metal solidification process, resulting in uneven size of the installation hole and uneven surface, which affects the accuracy of the installation hole.
A directional machine bracket casting system is designed, including fixed molds, motion, overflow holes, and driving groups. During the injecting of the solution through the sealing block and spring mechanism The upper sliding of the block allows the solution to flow inside the overflow hole, and increase the pressure to dispen the bubbles.
Effectively suppress the formation of air bubbles in the bracket, improve the surface quality of the bracket and the size and accuracy of the installation hole, and ensure the normal use of the bracket.
Smart Images
Figure CN119328099A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of steering gear bracket casting, and in particular to a steering gear bracket casting system and process. Background Art
[0002] The steering gear bracket, also known as the steering gear bracket, is mainly used to connect the steering gear (steering gear) and the frame of the car. Its main function is to convert the force applied by the driver to the edge of the steering wheel into torque and then transmit it to the steering shaft, so as to achieve smooth steering of the car; The steering gear bracket is manufactured by injection molding to enable fast and standard molding; during the injection molding process, because the bracket has a fixed-size mounting hole, bubbles will be generated when the solution is injected into the mold. The bubbles may occupy a certain volume in the metal solution, and as the metal solidifies, these bubbles may be trapped inside or on the surface of the metal. When the bubbles are located near or inside the mounting hole, they will change the solidification behavior of the metal in that area. The metal around the bubbles may shrink unevenly due to the presence of the bubbles, causing the size of the mounting hole to change. In addition, the bubbles may also cause unevenness on the local surface of the bracket, further affecting the accuracy of the mounting hole. Although the flatness of most surfaces of the bracket does not affect its normal use, the size of the mounting hole often requires higher precision to meet its use accuracy. Summary of the invention
[0003] The object of the present invention is to provide a steering gear bracket casting system and process to solve the problems raised in the above background technology.
[0004] To achieve the above object, the present invention provides the following technical solutions: a steering gear bracket casting system, comprising a fixed mold, a movable mold, an overflow hole provided on the fixed mold, and a driving group for driving the fixed mold and the movable mold to move relative to each other, a sealing block is slidably connected inside the overflow hole, and support groups are provided on both the front and rear sides of the sealing block; The support group comprises a support rod, a positioning groove and a cylinder, the bottom end of the support rod is rotatably connected to the side wall of the sealing block, the top of the support rod is rotatably connected to the stretching block, the stretching block is slidably connected to a support plate, the inner wall of the support plate is fixedly connected to a first spring, the support plate is slidably connected to a support frame, the support frame is fixedly connected to the fixed mold, the side wall of the support plate and the support frame are fixedly connected to a second spring, a clamping piece is slidably connected to the support plate, the clamping piece is located on one side of the stretching block and blocks the stretching block, a third spring is fixedly connected between the bottom of the clamping piece and the inner wall of the support plate, the positioning groove is opened on the side wall of the support frame, the clamping piece can be inserted into the positioning groove after moving to a position corresponding to the positioning groove, the end of the stretching block is fixedly connected to a contact piece, the ends of the contact piece and the clamping piece are both wedge-shaped, and the contact piece is used to push the clamping piece out after the clamping piece enters the positioning groove, and the cylinder is fixedly connected to the fixed mold and is located in front of the stretching block.
[0005] As a further solution of the present invention, a limiting frame is fixedly connected to the fixed mold, the limiting frame is U-shaped, a cross bar is slidably connected inside the limiting frame, and the two ends of the cross bar are respectively located on the front and rear sides of the limiting frame, a fourth spring is fixedly connected between the cross bar and the fixed mold, a scraper is provided on the cross bar, and two baffle bars are provided on the left side of the cross bar, the baffle bars are both slidably connected to the movable mold, a fifth spring is fixedly connected between the baffle bars and the movable mold, the ends of the baffle bars extend upward to the front and rear of the two stretching blocks, and the first spring is elastically released when the clamp enters the positioning groove.
[0006] As a further solution of the present invention, the scraper is wedge-shaped.
[0007] As a further solution of the present invention, a cleaning rod is slidably connected to the movable mold, a sixth spring is fixedly connected between the cleaning rod and the movable mold, the cleaning rod is U-shaped and has two guide grooves, the scraper is rotatably connected to the cross bar, a torsion spring is sleeved on the rotating shaft of the scraper, the rotating shaft of the scraper passes through the cross bar and is fixedly connected to a gear, a push rod is fixedly connected to the gear, the push rod is L-shaped and its top end is at the same height as the guide groove, and a rack rod is fixedly connected to the limit frame.
[0008] As a further solution of the present invention, a guide groove is provided on the movable mold.
[0009] As a further solution of the present invention, the driving group includes a base plate and a hydraulic rod, the base plate is fixedly connected to the fixed mold, and the hydraulic rod is fixedly connected between the base plate and the movable mold.
[0010] As a further solution of the present invention, the sealing block is composed of a sealing head and a sealing bottom plate, and the sealing head and the sealing bottom plate are plugged and fixed by bolts.
[0011] A casting process for a steering gear bracket, the process comprising the following steps; Step 1: After the movable mold and the fixed mold are fitted together, a solution is injected into the mold cavity until the solution lifts up the sealing block, and the second spring is stretched to increase the pressure of the solution inside the mold cavity, thereby collapsing the bubbles; Step 2: When the clamp enters the positioning groove, the clamp releases the restriction on the stretching block, and the stretching block slides along the support plate under the elastic action of the first spring to drive the sealing block to rise above the overflow hole to prevent the sealing block from sticking to the solution; Step 3: After the clamp releases the restriction on the stretching block, the stretching block pushes the stop rod to release the restriction on the cross bar, and then the fourth spring elastically relaxes to allow the scraper to clean the solution residue at the bottom of the sealing block to avoid the formation of lumps at the bottom of the sealing block after repeated use; Step 4: After the scraper moves to the limit, the push rod lowers the cleaning rod by squeezing the guide groove, and then the scraper surface is cleaned by the cleaning rod during the mold opening process, and the cleaning is discharged through the guide groove to ensure the cleaning effect of the scraper on the sealing block.
[0012] Compared with the prior art, the present invention has the following beneficial effects: According to the present invention, after the mold cavity is filled with the solution, the solution flows into the overflow hole and lifts up the sealing block, and in the process of the sealing block sliding up, the second spring is gradually stretched, so that the solution inside the mold cavity is squeezed and the pressure of the internal solution is increased, thereby inhibiting the formation of bubbles inside the solution, and the pressure gradually increases in the process of the sealing block being continuously lifted up, so that the bubbles inside the mold cavity are continuously compressed and collapsed, thereby making the surface quality of the subsequent bracket after molding and the dimensional accuracy of the mounting hole more regular, and the solution flows toward the overflow hole through the upward sliding of the sealing block, and the pressure is increased in the process of flowing, which can provide guidance for the flow of the solution while the pressure is increased, and is more efficient than increasing the pressure of the solution when it is stationary to collapse the bubbles.
[0013] When the clamp enters the interior of the positioning groove, the elastic reset of the first spring will not fail due to the obstruction of the stretching block by the clamp, but can quickly move the stretching block, thereby causing the sealing block to rise to a corresponding height again, so that the sealing block can rise above the liquid level of the solution, avoiding the solution from connecting to the sealing block after cooling, thereby not affecting the mold opening effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the positional relationship between the overflow hole and the fixed mold and the movable mold of the present invention; Figure 3 It is a schematic diagram of the positional relationship between the sealing block and the overflow hole of the present invention; Figure 4It is a structural schematic diagram of the support group of the present invention; Figure 5 A schematic diagram of the positional relationship between the support frame, the positioning groove and the stretching block of the present invention; Figure 6 It is a schematic diagram of the positional relationship between the support plate, the support frame and the clamping member of the present invention; Figure 7 It is a schematic diagram of the positional relationship between the stretching block, the first spring and the contact member of the present invention; Figure 8 A top view of the clamp and the positioning groove of the present invention; Fig. 9 It is a schematic diagram of the positional relationship between the scraper blade, the cross bar and the limit frame of the present invention; Fig.10 It is a schematic diagram of the positional relationship between the scraper blade, the cross bar and the baffle bar of the present invention; Fig.11 It is a schematic diagram of the positional relationship between the cross bar, the gear and the top rod of the present invention; Fig.12 It is a schematic diagram of the positional relationship between the cross bar and the baffle bar, and between the support frame and the stretching block of the present invention; Fig.13 It is a schematic diagram of the positional relationship between the movable mold, the cleaning rod and the blocking rod of the present invention; Fig.14 It is a schematic diagram of the positional relationship between the guide groove, the sixth spring and the cleaning rod of the present invention; Fig.15 It is a schematic diagram of the positional relationship between the sealing head and the sealing bottom plate of the present invention; Fig.16 It is a process flow chart of the present invention.
[0015] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Fixed mold; 2. Moving mold; 3. Overflow hole; 4. Sealing block; 5. Support rod; 6. Stretching block; 7. Support plate; 8. First spring; 9. Support frame; 10. Second spring; 11. Clamp; 12. Third spring; 13. Positioning groove; 14. Contact piece; 15. Cylinder; 16. Limit frame; 17. Cross bar; 18. Fourth spring; 19. Scraper; 20. Stop rod; 21. Fifth spring; 22. Cleaning rod; 23. Guide groove; 24. Sixth spring; 25. Torsion spring; 26. Gear; 27. Push rod; 28. Rack rod; 29. Guide groove; 30. Base plate; 31. Hydraulic rod; 32. Sealing head; 33. Sealing bottom plate. DETAILED DESCRIPTION
[0016] See also Figure 1-Figure 16The present invention provides a technical solution: a steering gear bracket casting system, comprising a fixed mold 1, a movable mold 2, an overflow hole 3 provided on the fixed mold 1, and a driving group for driving the fixed mold 1 and the movable mold 2 to move relative to each other, a sealing block 4 is slidably connected inside the overflow hole 3, and support groups are provided on both the front and rear sides of the sealing block 4; The support group includes a support rod 5, a positioning groove 13 and a cylinder 15. The bottom end of the support rod 5 is rotatably connected to the side wall of the sealing block 4. The top end of the support rod 5 is rotatably connected to the stretching block 6. The stretching block 6 is slidably connected to the support plate 7. A first spring 8 is fixedly connected between the inner wall of the support plate 7 and the bottom of the stretching block 6. The support plate 7 is slidably connected to a support frame 9. The support frame 9 is fixedly connected to the fixed mold 1. A second spring 10 is fixedly connected between the side wall of the support plate 7 and the support frame 9. A clamp 11 is slidably connected to the support plate 7. The clamp 11 is located at a position of the stretching block 6. The side of the stretching block 6 is blocked, and a third spring 12 is fixedly connected between the bottom of the clamp 11 and the inner wall of the support plate 7. A positioning groove 13 is opened on the side wall of the support frame 9. The clamp 11 can be inserted into the positioning groove 13 after moving to the position corresponding to the positioning groove 13. A contact piece 14 is fixedly connected to the end of the stretching block 6. The ends of the contact piece 14 and the clamp 11 are both wedge-shaped. The contact piece 14 is used to push the clamp 11 out after the clamp 11 enters the positioning groove 13. The cylinder 15 is fixedly connected to the fixed mold 1 and is located in front of the stretching block 6.
[0017] like Figure 1-Figure 8 As shown: The driving group controls the fitting and separation of the movable mold 2 and the fixed mold 1. After the movable mold 2 and the fixed mold 1 are fitted together, the solution is injected into the mold cavities of the two from the bottom, and at this time, the sealing block 4 is inside the overflow hole 3. During the solution injection process, the mold cavity will gradually be filled and the liquid level will gradually rise. After the solution fills the entire mold cavity, the solution will enter the overflow hole 3 and it is necessary to continue to inject. While continuing to inject, the solution will gradually lift the sealing block 4 to make the sealing block 4 slide up along the overflow hole 3. The lifting of the sealing block 4 by the solution can gradually increase the pressure on the solution in the mold cavity, thereby suppressing the formation of bubbles in the solution, and in the process of the sealing block 4 being continuously lifted During the process, the bubbles inside the mold cavity are continuously compressed and collapsed. When the sealing block 4 slides up inside the overflow hole 3, it pushes the stretching block 6 to move through the two support rods 5. At this time, the first spring 8 is in a stretched state. The first spring 8 has a tendency to pull the stretching block 6 to slide along the support plate 7, but the stretching block 6 is blocked by the clamp 11 and cannot move. Therefore, at this time, the stretching block 6 will forcibly drive the support plate 7 to slide along the support frame 9 and stretch the second spring 10. Then, when the solution lifts up the sealing block 4, the stretching of the second spring 10 reacts to the solution pressure, so that the solution needs a greater thrust to push the sealing block 4 to slide up, thereby increasing the pressure of the solution inside the mold cavity; As the sealing block 4 slides upward, the stretching block 6 and the support plate 7 will gradually move toward the direction of the positioning groove 13. After the clamping piece 11 moves to the position corresponding to the positioning groove 13, the elastic relaxation of the third spring 12 will cause the clamping piece 11 to be clamped into the interior of the positioning groove 13. At this time, the sealing block 4 is in a plane coincident with the upper end of the overflow hole 3 (or slightly lower than the upper end of the overflow hole 3). At this time, the support plate 7 will stop at this position, and then the injection of the solution into the mold cavity will also be stopped. Because the first spring 8 itself is in a stretched state, when the clamping piece 11 enters the positioning groove 13 to lock the support plate 7, the stretching block 6 will be quickly driven to slide along the support plate 7 under the action of the first spring 8. At this time, the stretching block 6 will drive the sealing block 4 to rise to a height higher than the overflow hole 3 and then stop. At this time, the sealing block 4 is separated from the liquid level of the solution. At this time, you can wait for the solution in the mold cavity to cool and form. After forming, the driving group drives the movable mold 2 away from the fixed mold 1 and then demolds it. In the present invention, after the solution fills the mold cavity, it flows into the overflow hole 3 and lifts up the sealing block 4. In the process of the sealing block 4 sliding up, the second spring 10 is gradually stretched, so that the solution inside the mold cavity is squeezed and the pressure of the internal solution is increased, thereby inhibiting the formation of bubbles inside the solution. In addition, in the process of the sealing block 4 being continuously lifted up, the pressure gradually increases, so that the bubbles inside the mold cavity are continuously compressed and collapsed, thereby making the surface quality of the subsequent bracket after molding and the dimensional accuracy of the mounting hole more regular. The sealing block 4 slides upward to make the solution flow toward the overflow hole 3, and the pressure increases during the flow, which can provide guidance for the flow of the solution while the pressure increases, and is more efficient in increasing the pressure of the solution when it is stationary to collapse the bubbles. When the clamp 11 enters the interior of the positioning groove 13, the elastic reset of the first spring 8 will not fail due to the obstruction of the clamp 11 to the stretching block 6, but can quickly move the stretching block 6, thereby causing the sealing block 4 to rise to a corresponding height again, so that the sealing block 4 can rise above the liquid level of the solution, thereby preventing the solution from connecting with the sealing block 4 after cooling, thereby not affecting the mold opening effect; After the bracket inside the mold cavity is opened, the movable mold 2 and the fixed mold 1 are fitted again through the driving group. At this time, the sealing block 4 is above the overflow hole 3, and then the cylinder 15 is started. After the cylinder 15 is extended to fit with the contact piece 14, it will push the contact piece 14 and the stretching block 6 to slide along the support plate 7. At this time, the first spring 8 will be gradually stretched, but the clamping piece 11 is inside the positioning groove 13 at this time and will not move the support plate 7. When the stretching block 6 is pushed to the point where the contact piece 14 contacts the end of the clamping piece 11, the contact piece 14 continues to move, and the clamping piece 11 is removed from the positioning groove 13 through the wedge-shaped ends of the two. When the second spring 10 is pulled back, the first spring 8 will be out of contact with the end of the cylinder 15. At this time, the side wall of the stretching block 6 is on the side of the clamp 11 close to the sealing block 4, so the first spring 8 will have a tendency to pull the stretching block 6 to move slightly until the end of the stretching block 6 contacts the clamp 11 (such as Figure 5 Then the solution can be injected into the mold cavity again to start molding again.
[0018] A limit frame 16 is fixedly connected to the fixed mold 1, and the limit frame 16 is U-shaped. A cross bar 17 is slidably connected inside the limit frame 16, and both ends of the cross bar 17 are respectively located on the front and rear sides of the limit frame 16. A fourth spring 18 is fixedly connected between the cross bar 17 and the fixed mold 1, and a scraper 19 is arranged on the cross bar 17. Two baffle rods 20 are arranged on the left side of the cross bar 17. The baffle rods 20 are slidably connected to the movable mold 2, and a fifth spring 21 is fixedly connected between the baffle rods 20 and the movable mold 2. The ends of the baffle rods 20 extend upward to the front and rear of the two stretching blocks 6, and the first spring 8 is elastically released when the clamp 11 enters the positioning groove 13.
[0019] like Figure 4 , Figure 9-13 As shown: Before the movable mold 2 and the fixed mold 1 are not attached, the fourth spring 18 is in a relaxed state, and the scraper 19 is at the far left. However, when the movable mold 2 approaches the fixed mold 1, the stopper 20 contacts the end of the crossbar 17 and pushes the crossbar 17 to slide along the limit frame 16 when the movable mold 2 approaches the fixed mold 1. At this time, the fourth spring 18 is gradually compressed. When the movable mold 2 and the fixed mold 1 are attached, the cylinder 15 can be extended to contact the contact piece 14, so that the sealing block 4 is inserted into the overflow hole 3. After the solution is injected into the mold cavity, the sealing block 4 is lifted up by the solution, and the stretching block 6 gradually moves toward the direction of the blocking rod 20 (eg Fig.12As shown), after the card 11 enters the positioning groove 13, the card 11 releases the restriction on the stretching block 6, and then the first spring 8 drives the stretching block 6 to slide along the support plate 7. After the stretching block 6 slides to the limit, it will push the baffle 20 to slide along the movable mold 2 and compress the fifth spring 21. At this time, the sealing block 4 has risen to the top of the overflow hole 3, and at this time, the bottom of the sealing block 4 and the top of the scraper 19 are at the same horizontal height. Before the baffle 20 slides, it resists the side of the cross bar 17, and then the fourth spring 18 is in a compressed state. When the baffle 20 moves, the cross bar 17 is not blocked by the baffle 20. At this time, the fourth spring 18 elastically relaxes and drives the cross bar 17 and the scraper 19 to move. At this time, the cross bar 17 slides along the limit frame 16, and then the scraper 19 will scrape off the small amount of solution attached to the bottom of the sealing block 4 during the movement, thereby avoiding that more and more solution is attached after multiple uses and affecting the normal use effect.
[0020] The scraper blade 19 is wedge-shaped.
[0021] like Figure 9-10 As shown: The top of the wedge-shaped scraper 19 is smaller than the bottom, and it can slow down the flow of the solution through the inclined side wall after scraping off the solution attached to the sealing block 4. Although the fluidity of the solution itself is not large, the flow can be reduced by the restriction of the side wall of the scraper 19, thereby preventing the solution from falling onto the fixed mold 1 or the movable mold 2.
[0022] A cleaning rod 22 is slidably connected to the movable mold 2, and a sixth spring 24 is fixedly connected between the cleaning rod 22 and the movable mold 2. The cleaning rod 22 is U-shaped and has two guide grooves 23. The scraper 19 is rotatably connected to the cross bar 17. A torsion spring 25 is sleeved on the rotating shaft of the scraper 19. The rotating shaft of the scraper 19 passes through the cross bar 17 and is fixedly connected to a gear 26. A push rod 27 is fixedly connected to the gear 26. The push rod 27 is L-shaped and its top end is at the same height as the guide groove 23. A rack rod 28 is fixedly connected to the limit frame 16.
[0023] The movable mold 2 is provided with a guide groove 29 .
[0024] like Figure 9-14 As shown: When the fourth spring 18 elastically relaxes and drives the cross bar 17 and the scraper 19 to move to the end of the push rod 27 and enter the inside of the guide groove 23, the gear 26 will mesh with the rack rod 28. At this time, the scraper 19 and the gear 26 will rotate, and the torsion spring 25 will be compressed. When the gear 26 and the push rod 27 rotate, the push rod 27 will press down the guide groove 23, thereby causing the guide groove 23 and the cleaning rod 22 to slide down along the movable mold 2 and compress the sixth spring 24. Before the cleaning rod 22 is lowered, its height is higher than the scraper 19, and after the cleaning rod 22 is lowered, it is on the side of the scraper 19 away from the movable mold 2, and the gear 26 and the push rod 27 rotate to After reaching the limit, the inclined side wall of the scraper 19 will rotate to a horizontal state, and then you can wait for the steering gear bracket inside the mold cavity to be formed. When the molding is completed and demolding is performed, the driving group moves the movable mold 2 away from the fixed mold 1. At this time, the cleaning rod 22 and the baffle rod 20 will move with the movable mold 2. At this time, the cleaning rod 22 will move from one side of the scraper 19, and after contacting the scraper 19, the residual cooled solution on the scraper 19 will be forcibly scraped off to avoid the subsequent scraper 19 from scraping off the residual solution on the sealing block 4 incompletely. Then the cooled solution scraped off by the cleaning rod 22 will fall into the guide groove 29 and fall to the outside.
[0025] The driving group includes a base plate 30 and a hydraulic rod 31 . The base plate 30 is fixedly connected to the fixed mold 1 , and the hydraulic rod 31 is fixedly connected between the base plate 30 and the movable mold 2 .
[0026] like Figure 1 As shown: The base plate 30 provides support for the fixed mold 1 , and the movable mold 2 and the fixed mold 1 are moved closer and farther away from each other through the extension and retraction of the hydraulic rod 31 .
[0027] The sealing block 4 is composed of a sealing head 32 and a sealing bottom plate 33 , and the sealing head 32 and the sealing bottom plate 33 are plugged and fixed by bolts.
[0028] like Fig.15 As shown: The sealing head 32 and the sealing bottom plate 33 connected by bolts can facilitate the replacement of the sealing bottom plate 33 .
[0029] A casting process for a steering gear bracket, the process comprising the following steps; Step 1: After the movable mold 2 and the fixed mold 1 are attached to each other, a solution is injected into the mold cavity until the solution lifts up the sealing block 4, and the second spring 10 is stretched to increase the pressure of the solution in the mold cavity, thereby collapsing the bubbles; Step 2: When the clamp 11 enters the positioning groove 13, the clamp 11 releases the restriction on the stretching block 6. The stretching block 6 slides along the support plate 7 under the elastic action of the first spring 8 to drive the sealing block 4 to rise above the overflow hole 3 to prevent the sealing block 4 from adhering to the solution; Step 3: After the clamp 11 releases the restriction on the stretching block 6, the stretching block 6 pushes the blocking rod 20 to release the restriction on the cross bar 17, and then the fourth spring 18 elastically relaxes to allow the scraper 19 to clean the solution residue at the bottom of the sealing block 4 to prevent the sealing block 4 from forming lumps at the bottom after multiple uses; Step 4: After the scraper 19 moves to the limit, the push rod 27 squeezes the guide groove 23 to lower the cleaning rod 22, and then the surface of the scraper 19 is cleaned by the cleaning rod 22 during the mold opening process, and is discharged through the guide groove 29 after cleaning to ensure the cleaning effect of the scraper 19 on the sealing block 4.
Claims
1. A steering gear bracket casting system, comprising a fixed mold (1), a movable mold (2), an overflow hole (3) provided on the fixed mold (1), and a drive group for driving the fixed mold (1) and the movable mold (2) to move relative to each other, characterized in that: A sealing block (4) is slidably connected inside the overflow hole (3), and support groups are provided on both the front and rear sides of the sealing block (4); The support group comprises a support rod (5), a positioning groove (13) and a cylinder (15); the bottom end of the support rod (5) is rotatably connected to the side wall of the sealing block (4); the top end of the support rod (5) is rotatably connected to a stretching block (6); the stretching block (6) is slidably connected to a support plate (7); a first spring (8) is fixedly connected between the inner wall of the support plate (7) and the bottom of the stretching block (6); the support plate (7) is slidably connected to a support frame (9); the support frame (9) is fixedly connected to the fixed mold (1); a second spring (10) is fixedly connected between the side wall of the support plate (7) and the support frame (9); a clamp (11) is slidably connected to the support plate (7); the clamp (11) is located at the inner wall of the support plate (7) and the bottom of the stretching block (6); The stretching block (6) is disposed on one side thereof and blocks the stretching block (6); a third spring (12) is fixedly connected between the bottom of the clamping member (11) and the inner wall of the support plate (7); the positioning groove (13) is provided on the side wall of the support frame (9); the clamping member (11) can be inserted into the positioning groove (13) after being moved to a position corresponding to the positioning groove (13); a contact member (14) is fixedly connected to the end of the stretching block (6); the contact member (14) and the end of the clamping member (11) are both wedge-shaped; the contact member (14) is used to eject the clamping member (11) after the clamping member (11) enters the positioning groove (13); and the cylinder (15) is fixedly connected to the fixed mold (1) and is located in front of the stretching block (6).
2. A steering gear bracket casting system according to claim 1, characterized in that: A limiting frame (16) is fixedly connected to the fixed mold (1), the limiting frame (16) is U-shaped, a cross bar (17) is slidably connected inside the limiting frame (16), and two ends of the cross bar (17) are respectively located at the front and rear sides of the limiting frame (16), a fourth spring (18) is fixedly connected between the cross bar (17) and the fixed mold (1), a scraper (19) is provided on the cross bar (17), two stop bars (20) are provided on the left side of the cross bar (17), the stop bars (20) are slidably connected to the movable mold (2), a fifth spring (21) is fixedly connected between the stop bars (20) and the movable mold (2), and the ends of the stop bars (20) extend upward to the front and rear of the two stretching blocks (6), and the first spring (8) is elastically released when the clamp (11) enters the positioning groove (13).
3. A steering gear bracket casting system according to claim 2, characterized in that: The scraper (19) is wedge-shaped.
4. A steering gear bracket casting system according to claim 3, characterized in that: A cleaning rod (22) is slidably connected to the movable mold (2), a sixth spring (24) is fixedly connected between the cleaning rod (22) and the movable mold (2), the cleaning rod (22) is U-shaped and has two guide grooves (23), the scraper (19) is rotatably connected to the cross bar (17), a torsion spring (25) is sleeved on the rotation axis of the scraper (19), the rotation axis of the scraper (19) passes through the cross bar (17) and is fixedly connected to a gear (26), a push rod (27) is fixedly connected to the gear (26), the push rod (27) is L-shaped and its top end is at the same height as the guide groove (23), and a rack rod (28) is fixedly connected to the limiting frame (16).
5. A steering gear bracket casting system according to claim 4, characterized in that: The movable mold (2) is provided with a guide groove (29).
6. A steering gear bracket casting system according to claim 1, characterized in that: The driving group comprises a base plate (30) and a hydraulic rod (31); the base plate (30) is fixedly connected to the fixed mold (1); and the hydraulic rod (31) is fixedly connected between the base plate (30) and the movable mold (2).
7. A steering gear bracket casting system according to claim 1, characterized in that: The sealing block (4) is composed of a sealing head (32) and a sealing bottom plate (33); the sealing head (32) and the sealing bottom plate (33) are plugged together and fixed by bolts.
8. A casting process for a steering gear bracket, applicable to the casting system for a steering gear bracket as claimed in claim 4, characterized in that: The process comprises the following steps; Step 1: After the movable mold (2) and the fixed mold (1) are fitted together, a solution is injected into the mold cavity until the solution lifts up the sealing block (4) and the second spring (10) is stretched to increase the pressure of the solution in the mold cavity, thereby causing the bubbles to collapse; Step 2: When the clamp (11) enters the positioning groove (13), the clamp (11) releases the restriction on the stretching block (6), and the stretching block (6) slides along the support plate (7) under the elastic action of the first spring (8) to drive the sealing block (4) to rise above the overflow hole (3) to prevent the sealing block (4) from adhering to the solution; Step 3: After the clamp (11) releases the restriction on the stretching block (6), the stretching block (6) pushes the stop rod (20) to release the restriction on the cross bar (17), and then the fourth spring (18) elastically relaxes to allow the scraper (19) to clean the solution residue at the bottom of the sealing block (4), thereby preventing the sealing block (4) from forming lumps at the bottom after repeated use; Step 4: After the scraper (19) moves to the limit, the push rod (27) lowers the cleaning rod (22) by squeezing the guide groove (23), and then during the mold opening process, the surface of the scraper (19) is cleaned by the cleaning rod (22), and after cleaning, it is discharged through the guide groove (29) to ensure the cleaning effect of the scraper (19) on the sealing block (4).