CN219443378U - Centrifugal brake drum processing equipment - Google Patents
Centrifugal brake drum processing equipment Download PDFInfo
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- CN219443378U CN219443378U CN202320332469.XU CN202320332469U CN219443378U CN 219443378 U CN219443378 U CN 219443378U CN 202320332469 U CN202320332469 U CN 202320332469U CN 219443378 U CN219443378 U CN 219443378U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model provides centrifugal brake drum processing equipment which comprises a processing table, wherein two rolling support pieces with adjustable intervals are arranged at two ends of the surface of the processing table, and the two rolling support pieces are used for supporting and driving a casting die to rotate; the rolling support piece comprises a sliding plate, a first support assembly, a second support assembly and a driving assembly, wherein the surface of the sliding plate is provided with the first support assembly and the second support assembly with adjustable intervals; the first support component and the second support component have the same structure, and the first support component or the second support component is connected with the driving component; the first support assembly comprises a pushing assembly, a rotating shaft, a rotating wheel, a baffle plate and a moving plate. According to the utility model, a pipeline is formed by mechanical casting and centrifugation, the pre-processing of the brake drums is completed, and a plurality of brake drums can be formed by post-cutting finish machining; compared with the traditional sand casting, the method saves labor, saves production cost and improves processing efficiency.
Description
Technical Field
The utility model relates to the technical field of brake drum processing, in particular to centrifugal brake drum processing equipment.
Background
The brake drum is generally mounted on a hub of an electric bicycle, an electric motorcycle, a motorcycle or a sharing bicycle, and is a component rotating along with the wheel, and is also commonly called a brake hub or a brake drum; is an iron casting with a shape similar to a tambour, and is fixed with a tire and rotates at the same speed; when the automobile is braked, the brake shoe is pushed to contact with the inner edge of the brake drum by oil pressure, the rotation of the tire is restrained by friction force generated by contact, so that the purpose of braking is achieved, the brake hub is like a metal drum or a small drum sleeved on the hub, and the bottom of the drum is used for rubbing the hub of the automobile to stop the automobile when the automobile is braked.
The brake drum is usually manufactured through a sand mold during processing, the raw materials of the brake drum are manually injected into a sand mold during sand mold manufacturing, the brake drum is pre-processed after demolding, and then the brake drum is manufactured through corresponding finish machining; the brake drum is manufactured through the sand mold manufacturing technology, generally, only one brake drum can be prefabricated at a time by one sand mold die, the efficiency is low, and the sand mold manufacturing needs a large amount of manpower to support, so that labor force is consumed.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide centrifugal brake drum processing equipment, which can solve the problems that the existing brake drum manufacturing is carried out by a sand mould manufacturing technology, generally only one brake drum can be prefabricated at one time by one sand mould, the efficiency is low, and the sand mould manufacturing needs a large amount of manpower to support and consumes labor force.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model is realized by the following technical scheme: a centrifugal brake drum processing device,
the casting mold casting device comprises a processing table, wherein two rolling support pieces with adjustable intervals are arranged at two ends of the surface of the processing table, and the two rolling support pieces are used for supporting and driving a casting mold to rotate; the rolling support piece comprises a sliding plate, a first support assembly, a second support assembly and a driving assembly, wherein the surface of the sliding plate is provided with the first support assembly and the second support assembly with adjustable intervals; the first support component and the second support component have the same structure, and the first support component or the second support component is connected with the driving component; the first support component comprises a pushing component, a rotating shaft, a rotating wheel, a baffle plate and a moving plate; the side part of the movable plate is connected with one or more pushing components, and the movable plate is arranged on the surface of the sliding plate; two baffles are fixed on the surface of the movable plate, and a rotating shaft is rotatably connected between the two baffles; and a rotating wheel is fixed outside the rotating shaft.
Further, the pushing assembly comprises a fixed block, a screw rod and a pushing block, wherein the fixed block is fixed on the surface of the sliding plate, and the fixed block is in threaded connection with the screw rod; the end part of the screw rod is rotatably connected with a push block, and the push block is connected with a movable plate.
Further, at least two second sliding grooves are formed in the surface of the sliding plate, and the bottom end of the moving plate is inserted into and slidingly connected with the second sliding grooves.
Further, the driving assembly comprises a first belt pulley, a belt, a second belt pulley and a motor, wherein the motor is connected with the second belt pulley, and the second belt pulley is connected with the first belt pulley through the belt; the first belt pulley is connected with the first supporting component or the second supporting component.
Further, at least two first sliding grooves are formed in the surface of the processing table, and sliding blocks are connected in the first sliding grooves in a sliding mode; the top of the sliding block is fixed with a bolt, and the bolt is connected with the sliding plate.
Further, the novel hydraulic brake further comprises a brake assembly, wherein the brake assembly comprises a brake sheet, a supporting seat and a movable rod; the supporting seat is fixed at the top end of the processing table, and the surface of the supporting seat is rotationally connected with a movable rod; the end part of the movable rod is connected with a brake sheet, the surface of the brake sheet is of an arc-shaped structure, and the surface of the brake sheet is provided with anti-skid patterns.
Further, the device also comprises a conveying pipe, wherein the conveying pipe is fixed at one side of the top end of the processing table, and a plurality of water outlet holes are formed in the surface of the conveying pipe; the conveying pipe is used for conveying cooling liquid to spray out through the water outlet hole to radiate the casting die.
Further, the casting die comprises a protrusion, a pipeline main body, a first through hole, a bolt hole and a second through hole, wherein the protrusions are arranged on the surface of the pipeline main body, and the protrusions are in groups of one another; a first through hole is formed in the pipeline main body, and second through holes communicated with the first through holes are formed at two ends of the pipeline main body; the diameter of the second through hole is larger than that of the first through hole, and the inner wall of the second through hole is provided with a bolt hole.
Compared with the prior art, the utility model has the beneficial effects that:
according to the brake drum processing equipment, the casting mold is adopted for processing in a centrifugal mode, so that raw material molten iron is uniformly distributed in the casting mold, the quality of a formed pipeline is ensured to be processed, and the quality of the manufactured brake drum is further improved; in addition, a pipeline is formed through mechanical casting and centrifugation, the pre-processing of the brake drums is completed, and a plurality of brake drums can be formed through subsequent post-cutting finish machining; compared with the traditional sand casting, the method saves labor, saves production cost and improves processing efficiency;
according to the brake drum processing equipment, the processing table can be adjusted according to casting molds of different sizes so as to provide centrifugal force for the casting molds of different sizes, and the application range is wide;
according to the brake drum processing equipment, the brake assembly is arranged, so that the casting mould running at high speed can be braked, and the follow-up demoulding and other operations can be facilitated.
Drawings
The disclosure of the present utility model is described with reference to the accompanying drawings. It should be understood that the drawings are for purposes of illustration only and are not intended to limit the scope of the present utility model in which like reference numerals are used to designate like parts. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a centrifugal brake drum processing apparatus according to the present utility model;
FIG. 2 is a schematic view of a first support assembly and a driving assembly according to an embodiment of the present utility model;
FIG. 3 is a schematic view showing the structure of a casting mold according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a brake assembly according to an embodiment of the present utility model;
the reference numerals in the drawings indicate: 1. casting mold; 11. a protrusion; 12. a pipe body; 13. a first through hole; 14. bolt holes; 15. a second through hole; 2. a processing table; 21. a first chute; 3. a brake assembly; 31. a brake piece; 32. a support base; 33. a movable rod; 4. a slide plate; 41. a second chute; 42. a bolt; 43. a slide block; 5. a first support assembly; 51. a fixed block; 52. a screw; 53. a pushing block; 54. a rotating shaft; 55. a rotating wheel; 56. a baffle; 57. a moving plate; 6. a second support assembly; 7. a drive assembly; 71. a first pulley; 72. a belt; 73. a second pulley; 74. a motor; 8. a delivery tube; 81. and a water outlet hole.
Detailed Description
It is to be understood that, according to the technical solution of the present utility model, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present utility model. Accordingly, the following detailed description and drawings are merely illustrative of the utility model and are not intended to be exhaustive or to limit the utility model to the precise form disclosed.
The centrifugal brake drum processing equipment comprises a processing table 2, wherein two rolling support pieces with adjustable intervals are arranged at two ends of the surface of the processing table 2, and the two rolling support pieces are used for supporting and driving a casting mold 1 to rotate; the rolling support comprises a sliding plate 4, a first support component 5, a second support component 6 and a driving component 7, specifically, at least two first sliding grooves 21 are formed on the surface of the processing table 2, in the embodiment of the utility model, two first sliding grooves 21 are formed on the surface of the processing table 2, and a sliding block 43 is slidably connected in the first sliding grooves 21; as shown in fig. 2, the sliding block 43 is connected with the first chute 21 in a matching manner, so as to limit the movement of the rolling support, a bolt 42 is fixed at the top end of the sliding block 43, and the bolt 42 is connected with the sliding plate 4; loosening the bolt 42, pushing the slide plate 4, and then enabling the slide plate 4 to move on the surface of the processing table 2, so as to change the distance between the two rolling support pieces, and tightening the bolt 42 when the distance between the two rolling support pieces reaches a proper position, so as to fix the positions of the two rolling support pieces;
the surface of the sliding plate 4 is provided with two first supporting components 5 and second supporting components 6 with adjustable intervals; the first support component 5 and the second support component 6 have the same structure, and the first support component 5 or the second support component 6 is connected with the driving component 7; as shown in fig. 2, the second supporting component 6 is connected to the driving component 7, so that the driving component 7 can drive the rotating wheel 55 of the second supporting component 6 to rotate, and the rotating wheel 55 of the first supporting component 5 is a driven wheel and synchronously rotates under the rotation of the casting mold 1; illustratively, the first support assembly 5 includes a pushing assembly, a rotating shaft 54, a rotating wheel 55, a baffle 56, and a moving plate 57; the side part of the moving plate 57 is connected with one or more pushing components, the moving plate 57 is arranged on the surface of the sliding plate 4, specifically, the surface of the sliding plate 4 is provided with at least two second sliding grooves 41, in the utility model, the surface of the sliding plate 4 is provided with two second sliding grooves 41, the bottom end of the moving plate 57 is inserted into and slidingly connected with the second sliding grooves 41, the second sliding grooves 41 are used for limiting the movement of the moving plate 57, and when the positions of the first supporting component 5 and the second supporting component 6 are adjusted, the pushing components enable the first supporting component 5 or the second supporting component 6 to slide in the second sliding grooves 41 on the surface of the sliding plate 4, so that the distance between the first supporting component 5 and the second supporting component 6 is changed; two baffles 56 are fixed on the surface of the moving plate 57, and a rotating shaft 54 is rotatably connected between the two baffles 56; a rotating wheel 55 is fixed on the outer part of the rotating shaft 54; since the first support component 5 and the second support component 6 have the same structure, the baffle 56 extends out of the rotating wheel 55; one end of the casting mould 1 is supported by two rotating wheels 55, and two rolling support pieces are arranged, so that the whole casting mould 1 is supported; the driving component 7 drives the rotating wheel 55 to rotate, so that the casting mould 1 placed on the rotating wheel 55 can be driven to rotate, and centrifugal casting is completed;
in order to realize the adjustment of the distance between the first support component 5 and the second support component 6, the pushing component comprises a fixed block 51, a screw 52 and a pushing block 53, wherein the fixed block 51 is fixed on the surface of the sliding plate 4, and the fixed block 51 is in threaded connection with the screw 52; the end part of the screw 52 is rotatably connected with a push block 53, and the push block 53 is connected with a moving plate 57; the screw 52 is rotated to enable the screw 52 to move on the fixed block 51, so that the moving plate 57 can be driven to move on the sliding plate 4, the distance between the first support assembly 5 and the second support assembly 6 is completed, and the first support assembly 5 and the second support assembly 6 after the distance is adjusted can be fixed through bolts.
Illustratively, the drive assembly 7 includes a first pulley 71, a belt 72, a second pulley 73, and a motor 74, the motor 74 being coupled to the second pulley 73, and the second pulley 73 being coupled to the first pulley 71 by the belt 72; the first pulley 71 is connected to the first support assembly 5 or the second support assembly 6; when the casting mold 1 is centrifugally rotated, the motor 74 is started, the motor 74 drives the first pulley 71 to rotate through the second pulley 73 and the belt 72, and the first pulley 71 drives the rotating shaft 54 of the second support assembly 6 to rotate, so that the rotating wheel 55 of the second support assembly 6 rotates.
In order to timely brake the rotating casting die 1, the processing equipment of the utility model further comprises a brake assembly 3, as shown in fig. 4, wherein the brake assembly 3 comprises a brake sheet 31, a support seat 32 and a movable rod 33; the supporting seat 32 is fixed at the top end of the processing table 2, specifically, the supporting seat 32 is fixed at the center position of the top end of the processing table 2, and the surface of the supporting seat 32 is rotatably connected with a movable rod 33; the end part of the movable rod 33 is connected with a brake piece 31; in order to improve the braking efficiency, the surface of the braking piece 31 is of an arc structure, and the surface of the braking piece 31 is provided with anti-skid patterns; the braking action can be realized by adopting manual braking or braking through driving equipment, and the manual braking is realized by pressing one end of the movable rod 33 to enable the end of the movable rod 33 provided with the braking piece 31 to tilt, and the braking piece 31 is attached to the casting mould 1 to enable the casting mould 1 to be braked under the action of friction force; or by a driving device, for example, an electric push rod, a hydraulic push rod or a pneumatic rod, the driving device drives the movable rod 33 to rotate for braking, and any driving device capable of realizing the rotation of the movable rod 33 around the supporting seat 32 is within the scope of the present utility model.
In order to accelerate the cooling efficiency of the casting mold 1, the processing equipment of the utility model further comprises a conveying pipe 8, wherein the conveying pipe 8 is fixed on one side of the top end of the processing table 2, and a plurality of water outlet holes 81 are formed in the surface of the conveying pipe 8; the conveying pipe 8 is used for conveying cooling liquid to be sprayed out through the water outlet 81 so as to radiate heat of the casting mold 1; at the time of casting, the casting mold 1 which is centrifugally rotated is connected to a coolant supply point through the delivery pipe 8 and cooled and radiated through the water outlet 81.
The structure of the casting mold 1 is shown in fig. 3, the casting mold 1 comprises a protrusion 11, a pipe main body 12, a first through hole 13, a bolt hole 14 and a second through hole 15, wherein the protrusions 11 are arranged on the surface of the pipe main body 12, and the protrusions 11 are arranged in pairs; the protrusions 11 are provided with two groups; each group of two bulges 11 form grooves, and the grooves are matched with the rotating wheels 55 to limit the rotating wheels 55; a first through hole 13 is formed in the pipe body 12, and second through holes 15 communicated with the first through hole 13 are formed at two ends of the pipe body 12; the diameter of the second through hole 15 is larger than that of the first through hole 13, and a bolt hole 14 is formed in the inner wall of the second through hole 15; the second through hole 15 is used for placing a limiting ring, the limiting ring is fixed in the second through hole 15 by inserting bolts into the bolt holes 14, the limiting ring is used for preventing cast molten iron from flowing out, and the bolts and the limiting ring are taken out during demolding.
The processing equipment of the utility model is used for processing the brake drum: firstly, determining a casting mould 1 with proper size, and smearing a release agent in a first through hole 13 of the casting mould 1; then the distance between the two rolling support pieces and the distance between the first support component 5 and the second support component 6 are adjusted according to the size of the casting mould 1; when the distance between the two rolling support pieces is adjusted, the sliding plate 4 slides in the first sliding groove 21 on the surface of the processing table 2, and is fixed by tightening the bolts 42 after the proper position is reached; when the distance between the first support component 5 and the second support component 6 is adjusted, the screw rod 52 is rotated to push the push block 53, so that the moving plate 57 is driven to move on the surface of the sliding plate 4, and the sliding plate is fixed by the locking bolt after moving to a proper position; after the space between the two rolling support pieces and the space between the first support component 5 and the second support component 6 are adjusted to proper spaces, placing the casting mould 1 at the top end of the rotating wheel 55, and placing the rotating wheel 55 in a groove formed by the two bulges 11;
placing raw molten iron of the brake drum into a casting mold 1, starting a motor 74, driving a rotating shaft 54 to rotate by the motor 74, further driving a rotating wheel 55 to rotate, driving the casting mold 1 to rotate and centrifuge at a high speed when the rotating wheel 55 rotates, cooling the casting mold 1 through cooling liquid conveyed by a conveying pipe 8, demolding after rotating and centrifuging for a period of time to form a pipeline, and finishing the pre-processing of the brake drum; the demolded tube is polished, ground and cut and lathed to form a brake drum.
According to the brake drum processing equipment, the casting mold is adopted for processing in a centrifugal mode, so that raw material molten iron is uniformly distributed in the casting mold, the quality of a formed pipeline is ensured to be processed, and the quality of the manufactured brake drum is further improved; in addition, a pipeline is formed through mechanical casting and centrifugation, the pre-processing of the brake drums is completed, and a plurality of brake drums can be formed through subsequent post-cutting finish machining; compared with the traditional sand casting, the method saves labor, saves production cost and improves processing efficiency;
according to the brake drum processing equipment, the processing table can be adjusted according to casting molds of different sizes so as to provide centrifugal force for the casting molds of different sizes, and the application range is wide;
according to the brake drum processing equipment, the brake assembly is arranged, so that the casting mould running at high speed can be braked, and the follow-up demoulding and other operations can be facilitated.
The utility model provides a centrifugal brake drum processing method, which comprises the following steps:
step one: placing raw material iron into a melting furnace for melting, and pouring out molten iron at 1500 ℃;
step two: molten iron at 1350-1400 ℃ is poured into the casting mould 1, the motor 74 is started to rotate and centrifuge the casting mould 1, and the conveying pipe 8 is communicated to cool the casting mould 1 through the water outlet 81;
wherein the rotational speed of the casting mould 1 is 2400-2800, preferably 2600; the casting mold 1 rotates for 3min-4min.
Step three: taking out the pipe formed by casting cooled to 450-550 ℃ from the casting mould 1, and cooling;
specifically, loosening the bolts in the bolt holes 14, and taking out the limiting rings for limiting, namely taking out the cast pipe body in the casting mold 1;
step four: and polishing, grinding and cutting the cooled pipeline, and finishing the cooled pipeline by a lathe to form the brake drum.
The technical scope of the present utility model is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present utility model, and these changes and modifications should be included in the scope of the present utility model.
Claims (8)
1. The utility model provides a centrifugal brake drum processing equipment which characterized in that: comprising
The device comprises a processing table (2), wherein two rolling support pieces with adjustable intervals are arranged at two ends of the surface of the processing table (2), and the two rolling support pieces are used for supporting and driving a casting mold (1) to rotate; the rolling support piece comprises a sliding plate (4), a first support assembly (5), a second support assembly (6) and a driving assembly (7), wherein the surface of the sliding plate (4) is provided with two first support assemblies (5) and second support assemblies (6) with adjustable intervals;
the first support component (5) and the second support component (6) have the same structure, and the first support component (5) or the second support component (6) is connected with the driving component (7); the first support assembly (5) comprises a pushing assembly, a rotating shaft (54), a rotating wheel (55), a baffle plate (56) and a moving plate (57); the side part of the moving plate (57) is connected with one or more pushing components, and the moving plate (57) is arranged on the surface of the sliding plate (4); two baffles (56) are fixed on the surface of the moving plate (57), and a rotating shaft (54) is rotatably connected between the two baffles (56); a rotating wheel (55) is fixed outside the rotating shaft (54).
2. A centrifugal brake drum processing apparatus according to claim 1, wherein: the pushing assembly comprises a fixed block (51), a screw rod (52) and a pushing block (53), wherein the fixed block (51) is fixed on the surface of the sliding plate (4), and the fixed block (51) is connected with the screw rod (52) in a threaded manner; the end part of the screw rod (52) is rotatably connected with a push block (53), and the push block (53) is connected with a moving plate (57).
3. A centrifugal brake drum processing apparatus according to claim 1, wherein: at least two second sliding grooves (41) are formed in the surface of the sliding plate (4), and the bottom end of the moving plate (57) is inserted into and slidingly connected with the second sliding grooves (41).
4. A centrifugal brake drum processing apparatus according to claim 1, wherein: the driving assembly (7) comprises a first belt pulley (71), a belt (72), a second belt pulley (73) and a motor (74), wherein the motor (74) is connected with the second belt pulley (73), and the second belt pulley (73) is connected with the first belt pulley (71) through the belt (72); the first belt pulley (71) is connected with the first supporting component (5) or the second supporting component (6).
5. A centrifugal brake drum processing apparatus according to claim 1, wherein: at least two first sliding grooves (21) are formed in the surface of the processing table (2), and sliding blocks (43) are connected in the first sliding grooves (21) in a sliding mode; a bolt (42) is fixed at the top end of the sliding block (43), and the bolt (42) is connected with the sliding plate (4).
6. A centrifugal brake drum processing apparatus according to any one of claims 1 to 5, wherein: the novel brake device further comprises a brake assembly (3), wherein the brake assembly (3) comprises a brake sheet (31), a supporting seat (32) and a movable rod (33); the supporting seat (32) is fixed at the top end of the processing table (2), and a movable rod (33) is rotatably connected to the surface of the supporting seat (32); the end part of the movable rod (33) is connected with a brake sheet (31), the surface of the brake sheet (31) is of an arc-shaped structure, and anti-skid patterns are arranged on the surface of the brake sheet (31).
7. A centrifugal brake drum processing apparatus according to any one of claims 1 to 5, wherein: the device further comprises a conveying pipe (8), wherein the conveying pipe (8) is fixed on one side of the top end of the processing table (2), and a plurality of water outlet holes (81) are formed in the surface of the conveying pipe (8); the conveying pipe (8) is used for conveying cooling liquid to be sprayed out through the water outlet (81) to radiate heat of the casting die (1).
8. A centrifugal brake drum processing apparatus according to any one of claims 1 to 5, wherein: the casting die (1) comprises protrusions (11), a pipeline main body (12), a first through hole (13), a bolt hole (14) and a second through hole (15), wherein the protrusions (11) are arranged on the surface of the pipeline main body (12), and the protrusions (11) are arranged in pairs; a first through hole (13) is formed in the pipeline main body (12), and second through holes (15) communicated with the first through hole (13) are formed at two ends of the pipeline main body (12); the diameter of the second through hole (15) is larger than that of the first through hole (13), and a bolt hole (14) is formed in the inner wall of the second through hole (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320332469.XU CN219443378U (en) | 2023-02-28 | 2023-02-28 | Centrifugal brake drum processing equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320332469.XU CN219443378U (en) | 2023-02-28 | 2023-02-28 | Centrifugal brake drum processing equipment |
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| CN219443378U true CN219443378U (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320332469.XU Active CN219443378U (en) | 2023-02-28 | 2023-02-28 | Centrifugal brake drum processing equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117206937A (en) * | 2023-11-08 | 2023-12-12 | 龙口市胶东机械配件有限公司 | Frock is used in brake drum drilling |
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2023
- 2023-02-28 CN CN202320332469.XU patent/CN219443378U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117206937A (en) * | 2023-11-08 | 2023-12-12 | 龙口市胶东机械配件有限公司 | Frock is used in brake drum drilling |
| CN117206937B (en) * | 2023-11-08 | 2024-02-06 | 龙口市胶东机械配件有限公司 | Frock is used in brake drum drilling |
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