Annular tightening device

Abstract

The invention relates to the technical field of wheel machining dies, and discloses an annular tightening device which comprises a supporting ring located at the top end of a base table, and the supporting ring is located at the bottom end of a lower die body at the top end of the base table. The two positioning assemblies are arranged at the top end and the bottom end of the supporting ring respectively, each positioning assembly comprises a plurality of positioning pieces which are arranged on the supporting ring at equal intervals in the circumferential direction, and the supporting ring is connected with the lower die body and the base table in a positioning mode through the positioning pieces; the two connecting assemblies are arranged at the top end and the bottom end of the supporting ring respectively, each connecting assembly comprises a plurality of connecting pieces which are arranged on the supporting ring at equal intervals in the circumferential direction, the positioning pieces and the connecting pieces are arranged in a staggered mode, and the supporting ring is connected with the lower die body and the base table in a limiting mode through the connecting pieces. The stability of the bottom film is guaranteed, then the product quality is guaranteed, meanwhile, mounting and dismounting are convenient, and the stability after mounting is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel processing molds, and particularly to an annular tightening device. Background Art

[0002] With the rapid economic development, the improvement of residents' consumption levels, and the rapid increase in the demand for automobiles, the automobile market has gradually expanded. With the rapid development of the automobile industry, as an important part of the automobile, the appearance quality and internal performance of aluminum alloy wheels directly affect the overall safety, comfort, and aesthetics of the vehicle.

[0003] As the core tool for producing wheels, the design, manufacturing, and maintenance of wheel molds all have a crucial impact on the production efficiency and finished product quality of wheels. Through scientific design, precise manufacturing, and regular maintenance, wheel molds can efficiently and stably produce high-quality wheel products. Reasonable selection of mold materials and manufacturing processes is the key to ensuring the durability and production performance of the molds. The use of advanced numerical control processing technology and precision measurement equipment can ensure that the machining accuracy and surface quality of the molds meet the design requirements. During the assembly and debugging of the molds, it is necessary to ensure that the assembly of each component is precise and the debugging parameters are reasonable to achieve the best production effect.

[0004] In the existing low-pressure casting aluminum alloy wheel molds, during the casting production process, the bottom mold will bulge upward and deform due to heat when working continuously in a high-temperature environment; as the production quantity of the molds increases, the bottom mold works under the pressure of the top mold and the upper platen for a long time, and the molten aluminum in the internal cavity of the mold needs to solidify under pressure, which will cause the center part of the bottom mold to gradually collapse downward as the production quantity increases. After the thermal deformation of the bottom mold, it will cause problems such as product shape change and out-of-tolerance of the front rim depth, and affect the machining dimensions of the product, resulting in defective products.

[0005] Therefore, there is an urgent need for an annular tightening device to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an annular tightening device to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above purpose, the present invention provides the following solution: The present invention provides an annular tightening device, including:

[0008] A support ring, located at the top of the base, and the support ring is at the bottom of the lower mold body located at the top of the base;

[0009] Two positioning components, respectively arranged at the top and bottom of the support ring, the positioning component includes a plurality of positioning members, which are arranged at equal intervals along the circumferential direction on the support ring, and the support ring is fixedly connected to the lower mold body and the base through the positioning members;

[0010] Two connecting components are respectively arranged at the top and bottom of the support ring. The connecting component includes a number of connecting pieces, which are arranged on the support ring at equal circumferential intervals. A number of the positioning pieces and a number of the connecting pieces are arranged alternately. The support ring is limitedly connected to the lower die body and the base through the connecting pieces.

[0011] According to an annular tightening device provided by the present invention, the positioning piece includes positioning tubes fixedly connected to the top and bottom of the support ring. A number of positioning holes are circumferentially and equally spaced on the top of the base and the top of the lower die body. The positioning tubes are adapted to the positioning holes. A limiting piece is arranged in the positioning tube, and the limiting piece is adapted to the positioning hole.

[0012] According to an annular tightening device provided by the present invention, the limiting piece includes two limiting rods. One end of the limiting rod is hinged to the inner side wall of the positioning tube, and the other end of the limiting rod is fixedly connected with a limiting head. A through hole is opened on the inner side wall of the positioning tube, and a limiting groove is opened on the inner side wall of the positioning hole. The limiting head passes through the through hole and extends into the limiting groove. A threaded rod is rotatably connected in the positioning tube, and a top block is threadedly connected to the threaded rod. The top block extends between the two limiting rods and is in contact with the limiting rods.

[0013] According to an annular tightening device provided by the present invention, a number of vertical grooves are circumferentially opened at both the top and bottom of the support ring. The connecting piece includes a first screw threadedly connected in the vertical groove. A number of first connecting holes are circumferentially opened on both the base and the lower die body. The first screw is threadedly connected to the first connecting hole. A number of second connecting holes are circumferentially opened on the side walls of both the support ring and the lower die body. A connecting head is threadedly connected in the second connecting hole. The threaded rod and the first screw are respectively connected to the connecting head.

[0014] According to an annular tightening device provided by the present invention, the connecting head includes a second screw. One end of the second screw is rotatably connected with a support block. A support plate is fixedly connected to the support block. Tooth plates are fixedly connected to both ends of the support plate. A cavity is opened inside the support ring. Two gears are rotatably connected in the cavity. The bottom end of the threaded rod is fixedly connected to one of the gears, and the first screw is threadedly connected to the other gear. The two gears are respectively meshed with the two tooth plates.

[0015] According to an annular tightening device provided by the present invention, the second connecting holes on the support ring are in two upper and lower circles, and the second connecting holes on the lower die body are in one circle and correspond to the upper second connecting holes on the support ring.

[0016] According to an annular tightening device provided by the present invention, a rectangular slideway is arranged inside a second connection hole on the support ring, and the support plate is adapted to the rectangular slideway.

[0017] According to an annular tightening device provided by the present invention, a torsion spring is arranged between the limiting rod and the inner side wall of the positioning tube, and two ends of the torsion spring are respectively fixedly connected with the inner side wall of the positioning tube and the limiting rod.

[0018] According to an annular tightening device provided by the present invention, a guiding chute is formed on the inner side wall of the positioning tube, a guiding block is fixedly connected to the outer side wall of the top block, and the guiding block is adapted to the guiding chute.

[0019] According to an annular tightening device provided by the present invention, inclined surfaces are arranged on both sides of the top of the top block, and the inclined surfaces are in sliding contact with the limiting rod.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] When the annular tightening device provided by the present invention is in use, the support ring is installed on the base through a positioning member, and the lower die body is installed on the support ring through a positioning member to achieve accurate and rapid positioning, and then the stable connection between the support ring and the base, and between the lower die body and the support ring is realized through a connecting member. This application ensures the stability of the bottom film, thereby ensuring the quality of the product, and at the same time is convenient for installation and disassembly and ensures the stability after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following described drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts:

[0023] Figure 1 It is a schematic structural diagram of the positioning component of the present invention;

[0024] Figure 2 For the present invention Figure 1 Partial enlarged view at A in;

[0025] Figure 3 It is a schematic structural diagram of the connecting component of the present invention;

[0026] Figure 4 For the present invention Figure 3 Partial enlarged view at B in;

[0027] Figure 5 It is a schematic structural diagram of the top surface of the support ring of the present invention;

[0028] Among them, 1. Support ring; 2. Base; 3. Lower die body; 4. Positioning tube; 5. Positioning hole; 6. Limit rod; 7. Limit head; 8. Through hole; 9. Limit groove; 10. Threaded rod; 11. Top block; 12. Vertical groove; 13. First screw; 14. First connection hole; 15. Second connection hole; 16. Second screw; 17. Support block; 18. Support plate; 19. Tooth plate; 20. Gear; 21. Rectangular slideway; 22. Torsion spring; 23. Guide chute; 24. Guide block. Specific implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0031] In related technologies, the manufacturing of aluminum alloy wheels is a material-intensive and labor-intensive low-value-added industry. Coupled with the fact that aluminum casting is an industry with high energy consumption and poor working conditions for workers, enterprises must continuously innovate to improve product quality and reduce costs in order to ensure sustainable development. During the production process of low-pressure casting aluminum alloy wheel molds, internal stress will be generated due to heat in the new mold, resulting in upward deformation of the lower die body and at the same time causing the blank to deform towards the flange surface. When the mold life reaches a certain number, the internal stress in the lower die begins to decrease, the hardness of the mold begins to decrease, and the lower die gradually deforms downward, at the same time causing the blank to deform towards the front of the blank. Since the order quantity of a single wheel type of the company is large and multiple sets of molds need to be produced online at the same time, there are certain differences in the mold life, which will lead to inconsistent deformation of the produced blanks, increasing the production difficulty of the machining process and the production scrap rate. Therefore, the anti-deformation structure design of the casting mold is particularly important.

[0032] In the related art, a wheel casting mold with an anti-deformation structure is disclosed, which includes N anti-deformation studs extending downward annularly and evenly along the center of the bottom of the back cavity of the lower mold body, where N = the number of spoke groups, and the anti-deformation studs correspond to the spoke casting areas one by one. The anti-deformation studs are provided with internal locking screw holes along the center. The anti-deformation ring extends vertically downward from the bottom of the back cavity of the lower mold body and is connected in series with N anti-deformation studs to form an integral structure; a central installation platform is provided at the center of the lower template, and the central installation platform tightly supports the anti-deformation ring, and the internal locking screw holes correspond to and are connected with the internal locking light holes on the central installation platform one by one; the casting mold is provided with anti-deformation studs in the spoke casting areas, and the deformed studs are locked to give a downward pulling force to prevent the upward deformation of the lower mold body, and the anti-deformation ring prevents the lower mold body from collapsing; the anti-deformation studs and the anti-deformation ring are an integral structure to prevent local deformation and lateral deformation; the anti-deformation structure can improve the deformation of the blank and the flash at the window, and improve the product consistency and the service life of the mold.

[0033] In the above related art, only bolts are used for connection. After long-term use, the bolts are prone to loosening, which affects the stability of the connection. At the same time, manual positioning is required during installation to ensure the precise docking between the bolt holes, and the installation and disassembly are not convenient enough, reducing the overall processing efficiency. To solve the above related problems, the present application provides the following solutions:

[0034] Referring to Figures 1 - 5 , the present invention provides an annular tightening device, including:

[0035] A support ring 1, located at the top of the base 2, and the support ring 1 is located at the bottom of the lower mold body 3 at the top of the base 2;

[0036] Two positioning components, respectively arranged at the top and bottom of the support ring 1. The positioning component includes a number of positioning members, which are arranged at equal intervals along the circumferential direction on the support ring 1. The support ring 1 is positioned and connected to the lower mold body 3 and the base 2 through the positioning members;

[0037] Two connection components, respectively arranged at the top and bottom of the support ring 1. The connection component includes a number of connection members, which are arranged at equal intervals along the circumferential direction on the support ring 1. A number of positioning members and a number of connection members are arranged alternately. The support ring 1 is limit-connected to the lower mold body 3 and the base 2 through the connection members.

[0038] In an embodiment of the present application, during use, the support ring 1 is installed on the base 2 through the positioning members, and the lower mold body 3 is installed on the support ring 1 through the positioning members to achieve precise and rapid positioning, and then the stable connection between the support ring 1 and the base 2, and between the lower mold body 3 and the support ring 1 is realized through the connection members.

[0039] As an alternative embodiment, the positioning member includes positioning tubes 4 fixedly connected to the top and bottom ends of the support ring 1. A plurality of positioning holes 5 are circumferentially and equally spaced on the top end of the base 2 and the top end of the lower die body 3. The positioning tubes 4 are adapted to the positioning holes 5, and a limiting member is provided inside the positioning tubes 4, and the limiting member is adapted to the positioning holes 5.

[0040] In an embodiment of the present application, the rapid positioning and installation between the base 2, the lower die body 3 and the support ring 1 are realized by providing a plurality of positioning tubes 4 and positioning holes 5.

[0041] As an alternative embodiment, the limiting member includes two limiting rods 6. One end of the limiting rod 6 is hinged to the inner side wall of the positioning tube 4, and the other end of the limiting rod 6 is fixedly connected with a limiting head 7. A through hole 8 is opened on the inner side wall of the positioning tube 4, and a limiting groove 9 is opened on the inner side wall of the positioning hole 5. The limiting head 7 passes through the through hole 8 and extends into the limiting groove 9. A threaded rod 10 is rotatably connected inside the positioning tube 4, and a top block 11 is threadedly connected to the threaded rod 10. The top block 11 extends between the two limiting rods 6 and is in contact with the limiting rods 6.

[0042] In an embodiment of the present application, by rotating the provided threaded rod 10, the top block 11 is driven to move vertically, and then the two hinged limiting rods 6 are controlled to rotate, so that the limiting head 7 passes through the through hole 8 and extends into the corresponding limiting groove 9, realizing the stable connection between the positioning tube 4 and the positioning hole 5.

[0043] As an alternative embodiment, a plurality of vertical grooves 12 are circumferentially opened at both the top and bottom ends of the support ring 1. The connecting member includes a first screw rod 13 threadedly connected in the vertical groove 12. A plurality of first connection holes 14 are circumferentially opened on both the base 2 and the lower die body 3. The first screw rod 13 is threadedly connected to the first connection holes 14. A plurality of second connection holes 15 are circumferentially opened on the side walls of both the support ring 1 and the lower die body 3. A connecting head is threadedly connected in the second connection holes 15, and the threaded rod 10 and the first screw rod 13 are respectively connected to the connecting head.

[0044] In an embodiment of the present application, the first screw rod 13 is threadedly connected in the vertical groove 12. When the first screw rod 13 rotates, it rises into the first connection hole 14 and continues to rotate to be threadedly connected to the first connection hole 14, thereby realizing the stable connection between the support ring 1 and the base 2 and the lower die body 3.

[0045] As an alternative embodiment, the connecting head includes a second screw rod 16. One end of the second screw rod 16 is rotatably connected with a support block 17. A support plate 18 is fixedly connected to the support block 17. Tooth plates 19 are fixedly connected to both ends of the support plate 18. A cavity is opened inside the support ring 1, and two gears 20 are rotatably connected in the cavity. The bottom end of the threaded rod 10 is fixedly connected to one of the gears 20, and the first screw rod 13 is threadedly connected to the other gear 20. The two gears 20 are respectively meshed with the two tooth plates 19.

[0046] In one embodiment of the present application, during use, the support plate 18 is inserted into the second connection hole 15 on the support ring 1 so that it enters the cavity. By turning the second screw rod 16 connected by threads, the support plate 18 is driven to move horizontally. Through the meshing of the gear 20 and the toothed plate 19, the corresponding first screw rod 13 is driven to rotate threadedly, and the threaded rod 10 rotates following the gear 20, thereby controlling the connection of the first screw rod 13 with the lower die body 3 and the base 2, and the threaded rod 10 drives the top block 11 to move.

[0047] As an alternative embodiment, the second connection holes 15 on the support ring 1 are in two upper and lower circles, the second connection holes 15 on the lower die body 3 are in one circle, and correspond to the second connection holes 15 located in the upper part of the support ring 1.

[0048] In one embodiment of the present application, the second connection holes 15 on the support ring 1 are in two upper and lower layers. The lower layer is used to directly install the connector to achieve connection with the base 2, and the upper layer is used to install the connector to achieve the connection of the support ring 1 and the lower die body 3.

[0049] As an alternative embodiment, a rectangular slideway 21 is provided inside the second connection hole 15 on the support ring 1, and the support plate 18 is adapted to the rectangular slideway 21.

[0050] In one embodiment provided, the rectangular slideway 21 is adapted to the support plate 18 to ensure the horizontal sliding of the support plate 18.

[0051] As an alternative embodiment, a torsion spring 22 is provided between the inner side wall of the positioning tube 4 and the limiting rod 6, and both ends of the torsion spring 22 are fixedly connected to the inner side wall of the positioning tube 4 and the limiting rod 6 respectively.

[0052] In one embodiment of the present application, the reset of the limiting rod 6 is achieved through the provided torsion spring 22.

[0053] As an alternative embodiment, a guiding chute 23 is provided on the inner side wall of the positioning tube 4, and a guiding block 24 is fixedly connected to the outer side wall of the top block 11, and the guiding block 24 is adapted to the guiding chute 23.

[0054] In one embodiment of the present application, by setting the guiding block 24 to slide in the guiding chute 23, the stable sliding of the guiding block 24 is ensured.

[0055] As an alternative embodiment, inclined surfaces are provided on both sides at the top of the top block 11, and the inclined surfaces are in sliding contact with the limiting rod 6.

[0056] In one embodiment of the present application, the stable pushing of the top block 11 against the limiting rod 6 is ensured through the provided inclined surfaces.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0058] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A ring tightening device, characterized in that, Comprising: A support ring (1), located at the top of the base (2), and the support ring (1) is at the bottom end of the lower die body (3) located at the top of the base (2); Two positioning components, respectively arranged at the top and bottom ends of the support ring (1), the positioning component includes a number of positioning members, which are arranged at equal intervals along the circumferential direction on the support ring (1), and the support ring (1) is positioned and connected to the lower die body (3) and the base (2) through the positioning members; Two connecting components, respectively arranged at the top and bottom ends of the support ring (1), the connecting component includes a number of connecting members, which are arranged at equal intervals along the circumferential direction on the support ring (1), and a number of the positioning members and a number of the connecting members are arranged alternately, and the support ring (1) is limitedly connected to the lower die body (3) and the base (2) through the connecting members.

2. The annular tightening device according to claim 1, characterized in that: The positioning member includes a positioning tube (4) fixedly connected to the top and bottom ends of the support ring (1), a number of positioning holes (5) are opened at equal intervals along the circumferential direction at the top end of the base (2) and the top end of the lower die body (3), the positioning tube (4) is adapted to the positioning hole (5), and a limiting member is arranged in the positioning tube (4), and the limiting member is adapted to the positioning hole (5).

3. The annular tightening device according to claim 2, characterized in that: The limiting member includes two limiting rods (6), one end of the limiting rod (6) is hinged on the inner side wall of the positioning tube (4), the other end of the limiting rod (6) is fixedly connected with a limiting head (7), a through hole (8) is opened on the inner side wall of the positioning tube (4), a limiting groove (9) is opened on the inner side wall of the positioning hole (5), the limiting head (7) passes through the through hole (8) and extends into the limiting groove (9), a threaded rod (10) is rotatably connected in the positioning tube (4), a top block (11) is threadedly connected to the threaded rod (10), the top block (11) extends between the two limiting rods (6) and is in contact with the limiting rod (6).

4. A circular tightening device according to claim 3, characterized in that: A number of vertical grooves (12) are opened along the circumferential direction at both the top and bottom ends of the support ring (1), the connecting member includes a first screw rod (13) threadedly connected in the vertical groove (12), a number of first connecting holes (14) are opened along the circumferential direction on both the base (2) and the lower die body (3), the first screw rod (13) is threadedly connected to the first connecting hole (14), a number of second connecting holes (15) are opened along the circumferential direction on the side walls of both the support ring (1) and the lower die body (3), a connecting head is threadedly connected in the second connecting hole (15), and the threaded rod (10) and the first screw rod (13) are respectively connected to the connecting head.

5. A ring tightening device according to claim 4, characterized in that: The connector includes a second screw rod (16). One end of the second screw rod (16) is rotatably connected to a support block (17). A support plate (18) is fixedly connected to the support block (17). Tooth plates (19) are fixedly connected to both ends of the support plate (18). A cavity is formed inside the support ring (1). Two gears (20) are rotatably connected inside the cavity. The bottom end of the threaded rod (10) is fixedly connected to one of the gears (20). The first screw rod (13) is threadedly connected to the other gear (20). The two gears (20) are respectively meshed with the two tooth plates (19).

6. A circular tightening device according to claim 4, characterized in that: The second connection holes (15) on the support ring (1) are in two upper and lower circles. The second connection holes (15) on the lower die body (3) are in one circle and correspond to the second connection holes (15) located in the upper part of the support ring (1).

7. A circular tightening device according to claim 5, characterized in that: A rectangular slideway (21) is arranged inside the second connection hole (15) on the support ring (1). The support plate (18) is adapted to the rectangular slideway (21).

8. The annular tightening device according to claim 3, wherein: A torsion spring (22) is arranged between the limiting rod (6) and the inner side wall of the positioning tube (4). Both ends of the torsion spring (22) are fixedly connected to the inner side wall of the positioning tube (4) and the limiting rod (6) respectively.

9. A circular tightening device according to claim 3, characterized in that: A guiding chute (23) is formed on the inner side wall of the positioning tube (4). A guiding block (24) is fixedly connected to the outer side wall of the top block (11). The guiding block (24) is adapted to the guiding chute (23).

10. A circular tightening device according to claim 9, characterized in that: Inclined surfaces are arranged on both sides of the top end of the top block (11), and the inclined surfaces are in sliding contact with the limiting rod (6).

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