A pulley and its casting mold

Abstract

The present invention discloses a novel belt pulley and its casting mold, the technical solution of which includes a belt pulley body and a wheel seat coaxially arranged in the belt pulley body, the wheel seat includes a first shaft and a second shaft coaxially arranged in the first shaft, the belt pulley body includes a wheel body, and a load-bearing connection assembly connecting the wheel body and the first shaft, the wheel body includes a first wheel body coaxially arranged in parallel and a second wheel body with a diameter larger than the first wheel body, the load-bearing connection assembly includes a first connection member arranged in the first wheel body, a second connection member arranged in the second wheel body, and a third connection member arranged between the first connection member and the second connection member. The present invention can not only use two belts of different widths for transmission, but also reduce the heat generated between the belts, thereby extending the service life.

Description

Technical Field

[0001] The invention relates to the field of pulley equipment, and specifically relates to a pulley and a casting mold thereof. Background Art

[0002] Pulleys are disc-hub parts. They are generally relatively large in size. The manufacturing process is generally based on casting and forging. Generally, larger designs are cast, and the material is generally cast iron (better casting performance), and cast steel is rarely used (steel has poor casting performance); generally, smaller ones can be designed for forging, and the material is steel. Pulleys are mainly used in situations where power is transmitted over long distances, such as the output of small diesel engine power, agricultural vehicles, tractors, automobiles, mining machinery, mechanical processing equipment, textile machinery, packaging machinery, lathes, forging machines, some small horsepower motorcycle power transmission, agricultural machinery power transmission, air compressors, reducers, reducers, generators, cotton gins, etc.

[0003] At present, the traditional improved situation generally uses one or several sets of universal test machine platforms to match the installation and placement of different models, but the drive motor is often solved by installing different specifications of test machine motor pulleys for different models. When changing the test machine product, it is often necessary to replace the motor pulley, which leads to low efficiency and is very inconvenient. Moreover, during use, due to the large contact surface between the pulley and the belt, a large amount of heat will be generated during the transmission process, thus affecting the life of the belt; the current casting mold of the pulley is made by using a mold plate to make the cavity in the sand box, and then manually placed up and down, which is cumbersome to operate and unstable to fix, seriously affecting the production efficiency of castings. Summary of the invention

[0004] The purpose of the present invention is to solve the existing problems and provide a pulley and a casting mold thereof, which can not only use two belts of different widths for transmission, but also reduce the heat generated between the belts and extend the service life.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] 14. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 13, wherein the first and the second wheels are arranged on the side of the wheel seat and the side frame are provided with a clockwise and counterclockwise rotation of the crankshaft and the crankshaft respectively. The clockwise and counterclockwise rotation of the crankshaft and the crankshaft respectively move the crankshaft to the side of the wheel seat and the side frame. The clockwise and counterclockwise rotation of the crankshaft and the crankshaft respectively move the crankshaft to the side of the wheel seat and the side frame.

[0007] The present invention is further configured as follows: a side portion of the third connecting member connected to the second wheel body is provided with an inclined surface, and a second arc chamfer is provided at a connection between the inclined surface and the inner side surface of the second wheel body.

[0008] The present invention is further configured as follows: the openings of the first wheel body and the second wheel body are both provided with inwardly facing groove chamfers.

[0009] The present invention is further configured as follows: groove rails are arranged in parallel on the outer sides of the first wheel body and the second wheel body.

[0010] The present invention is further configured as follows: the grooves of the first wheel body are arranged in parallel, with two grooves of the first wheel body having a cross-section of an isosceles trapezoid, and the two waist angles of the isosceles trapezoidal groove are 34°; the grooves of the second wheel body are arranged in parallel, with three grooves of the second wheel body (5) having a cross-section of an isosceles trapezoid, and the two waist angles of the isosceles trapezoidal groove of the second wheel body are greater than the two waist angles of the groove of the first wheel body.

[0011] The present invention is further configured as follows: it includes a sand box and positioning parts arranged on both sides of the sand box, the sand box includes an upper box body and a lower box body both of which are provided with upper openings, the bottom surface of the upper box body is respectively provided with a feed end, a riser connected to the feed end and a first cavity connected to the riser facing upward, and the bottom surface of the lower box body is respectively provided with a riser seat matching the riser and a second cavity matching the first cavity.

[0012] The present invention is further configured as follows: the feed end includes a sprue arranged on the upper box body and a horizontal sprue matching the sprue, the lower box body is provided with a sprue seat matching the sprue, and the riser seat is provided with a first inner sprue connected to the sprue.

[0013] The present invention is further configured as follows: the risers are two risers arranged on the diagonal line of the lower box body, and any of the risers is connected to the first cavity through the second ingates.

[0014] The present invention is further configured as follows: any of the positioning members includes a first positioning boss arranged on the upper box body, a second positioning boss arranged on the lower box body and a positioning shaft member passing through the first positioning boss and the second positioning boss, and the lower end of the lower box body is equipped with a bracket body to cooperate with the positioning shaft member.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The structure of the present invention is formed in one piece, replacing welding. It has high strength during use and is not easy to break, thus not affecting the production process. It has the characteristics of simple and reasonable structure. It has simple structure, easy production and manufacturing, and is suitable for mass production.

[0017] In the present invention, a plurality of groove rails are provided on each of the two wheel body grooves of the pulley, which not only accelerates the heat dissipation efficiency of the pulley and the belt during operation, but also maintains the overall force balance of the pulley, is beneficial to the force balance of the multi-groove pulley, and prolongs the service life of the pulley.

[0018] The model plate of the invention uses a pulley cavity, and the required sand box model is manufactured by the mutual cooperation of the first cavity and the second cavity, and has a simple structure and is easy to operate.

[0019] In the present invention, the sandbox is movably fixed to the upper end of the bracket body through a positioning piece. The design of the bracket body makes the overall structure of the mold more stable. The positioning shaft runs through the movable connection of the two positioning protrusions, making disassembly and installation more convenient.

[0020] The mold structure of the invention is simple, the sand molds in the upper box body and the lower box body match perfectly, the qualified rate of the manufactured pulley is high, and it is suitable for large-scale production, so its application prospect is very broad.

[0021] The process of the liquid casting material flowing from the sprue into the mold cavity in the present invention can reduce the amount of the liquid casting material flowing through the gap, thereby reducing the amount of waste material on the casting blank after molding, and effectively reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 : is an overall schematic diagram of the pulley in the present invention;

[0023] Figure 2 : is a side cross-sectional schematic diagram of the pulley in the present invention;

[0024] Figure 3 : is a schematic diagram of the main view of the pulley in the present invention;

[0025] Figure 4 : It is a schematic diagram of the top structure of the upper box body of the sand box in the present invention;

[0026] Figure 5 : It is a schematic diagram of the bottom view of the lower box body of the sand box in the present invention;

[0027] Figure 6 : is a schematic diagram of the overall structure of the casting mold in the present invention;

[0028] In the figure: 1. first shaft member; 2. second shaft member; 3. wheel body; 4. first wheel body; 5. second wheel body; 6. first connecting member; 7. second connecting member; 8. third connecting member; 9. protrusion; 10. through groove; 11. first frame; 12. second frame; 13. first arc chamfer; 14. inclined surface; 15. second arc chamfer; 16. groove chamfer; 17. groove rail; 18. shaft slot; 19. sand box; 20. bracket body; 21. upper box body; 22. lower box body; 23. riser; 24. first cavity; 25. riser seat; 26. second cavity; 27. sprue; 28. cross gate; 29. ​​gate seat; 30. first inner gate; 31. positioning shaft member; 32. air outlet needle; 33. mud core head cavity; 34. first positioning boss; 35. second positioning boss. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 3 As shown, the present invention provides a technical solution: a pulley, comprising a pulley body and a wheel seat coaxially arranged in the pulley body, the wheel seat comprising a first shaft member 1 and a second shaft member 2 coaxially arranged in the first shaft member 1, the pulley body comprising a wheel body 3, and a load-bearing connection assembly connecting the wheel body 3 and the first shaft member 1, the wheel body 3 comprising a first wheel body 4 coaxially arranged in parallel and a second wheel body 5 having a diameter larger than the first wheel body 4, the load-bearing connection assembly comprising a first connecting member 6 arranged in the first wheel body 4, a second connecting member 7 arranged in the second wheel body 5 and a third connecting member 8 arranged between the first connecting member 6 and the second connecting member 7.

[0031] In the present invention, the pulley is formed as one piece by casting of a wheel body 3, a load-bearing connection assembly and a wheel seat, and the wheel body 3 is arranged into a first wheel body 4 and a second wheel body 5 with two different diameters, so that two belts of different widths can be respectively wound around the first wheel body 4 and the second wheel body 5, thereby forming a distributed transmission of the wheel axle.

[0032] The first connecting member 6 and the second connecting member 7 each include a support frame, a protruding member 9 disposed on a side of the support frame, and a through slot 10 penetrating the support frame and the protruding member 9 .

[0033] The support frame includes a first frame body 11 connected to the first wheel axle and a second frame body 12 connected to the wheel body. The cross section of the second frame body 12 is a trapezoidal structure. A first arc chamfer 13 is provided at the connection between the first frame body 11 and the second frame body 12.

[0034] The four load-bearing connection components are evenly distributed around the wheel seat and the wheel body 3.

[0035] In the present invention, there are four load-bearing connection components, and the structure arranged at equal distances around the wheel seat makes adjacent load-bearing connection components perpendicular to each other to form a cross-shaped structure. When the pulley is assembled with a belt for use, the pressure applied to the pulley during rotation is relatively large. The load-bearing connection component can transmit the force applied to the pulley to the wheel seat, thereby maintaining balanced force on the pulley, preventing damage to the pulley due to uneven pressure, and improving the service life of the pulley.

[0036] The side of the third connecting member 8 connected to the second wheel body 5 is provided with an inclined surface 14 , and the connection between the inclined surface 14 and the inner side surface of the second wheel body 5 is provided with a second arc chamfer 15 .

[0037] The openings of the first wheel body 4 and the second wheel body 5 are both provided with inwardly facing groove chamfers 16 .

[0038] The outer sides of the first wheel body 4 and the second wheel body 5 are both provided with groove rails 17 in parallel.

[0039] The first wheel body 4 has two grooves arranged in parallel, and the cross section of any of the grooves is an isosceles trapezoid, and the angles of the two waist sides of the isosceles trapezoidal groove are 34°.

[0040] The second wheel body 5 has three grooves arranged in parallel, and the cross-section of any groove is an isosceles trapezoid, and the two waist angles of the isosceles trapezoidal groove are greater than the two waist angles of the groove of the first wheel body.

[0041] In the present invention, a plurality of grooves 17 are provided on the outer side surfaces of the first wheel body 4 and the second wheel body 5, the number of grooves of the two wheel bodies is different, and the angle of the first wheel body is 24°, and the angle of the second wheel body is 38°, so that the contact areas between the two wheel bodies and the belts are different, so that the belt can run smoothly on the wheel body 3 while reducing the contact area between the grooves 17 and the belt, thereby improving the heat dissipation capacity, reducing the heat generated by friction, reducing the damage to the belt, and improving the service life.

[0042] The inner side surface of the second shaft member 2 is provided with a rotation shaft slot 18 .

[0043] In the present invention, the shaft slot 18 provided inside the second shaft member 2 is used to connect the shaft passing through the wheel axle, and the protrusion on the outer wall of the shaft is plugged into the shaft slot 18. When the shaft rotates, the second shaft member 2 rotates driven by the connection between the protrusion on the outer wall of the shaft and the shaft slot 18, further driving the pulley to rotate.

[0044] See also Figures 4 to 6 As shown, a casting mold for a pulley includes a sand box 19 and positioning pieces arranged on both sides of the sand box 19, the sand box 19 includes an upper box body 21 and a lower box body 22 both of which are provided with upper openings, the bottom surface of the upper box body 21 is respectively provided with a feed end, a riser 23 connected to the feed end and a first cavity 24 connected to the riser 23, and the bottom surface of the lower box body 22 is respectively provided with a riser seat 25 matching the riser 23 and a second cavity 26 matching the first cavity 24.

[0045] In the present invention, the riser 23 forms two casting riser 23 cavities. When the liquid casting material is injected, the casting riser 23 cavity is also filled with liquid casting material. The liquid casting material here is designed to supplement the shrinkage of the casting during solidification to prevent defects such as shrinkage cavities and shrinkage. It also has the function of exhausting or collecting slag.

[0046] The feed end includes a sprue 27 provided on the upper box body 21 and a horizontal sprue 28 matching the sprue 27 , and the lower box body 22 is provided with a sprue seat 29 matching the sprue 27 .

[0047] The riser 23 is provided with a first inner gate 30 connected to the sprue 27 .

[0048] The risers 23 are two arranged on the diagonal line of the lower box body, and any of the risers 23 is connected to the first cavity 24 through the second inner gate.

[0049] In the present invention, the liquid casting material first enters the cross gate 28 through the straight gate 27, and then flows into the first ingates 30 through the cross gate 28. Since the first ingates 30 is connected to the cavity of the riser 23, the liquid casting material first flows into the cavity of the riser 23 and finally flows into the mold cavity, and fills the entire mold cavity, thereby forming a pulley. The liquid casting material fills the mold cavity through transition drainage, and the mold cavity is supplemented through the second ingates, thereby improving the quality of the casting and reducing the workload of subsequent cutting and grinding.

[0050] The first cavity 24 and the second cavity 26 both include a wheel body cavity, an axle seat cavity disposed in the wheel body cavity, and a load-bearing axle cavity connecting the wheel body cavity and the axle seat cavity.

[0051] The wheel cavity of the first cavity 24 is provided with an air outlet needle 32 .

[0052] In the present invention, two air outlet needles 32 are respectively arranged at the upper end of the upper box body 21, which is beneficial to the discharge of the cavity gas.

[0053] The shaft seat cavity of the second cavity 26 is provided with a mud core head cavity 33 .

[0054] In the present invention, the mud core head cavity is used for placing the core. Before casting, the core sand is made of raw sand and adhesive and placed in the cavity. After the liquid casting material is poured in and condensed, it is removed to form a cavity on the casting, which reduces the workload of subsequent drilling and trimming and improves work efficiency.

[0055] Any of the positioning members includes a first positioning boss 34 disposed on the upper box body 21 , a second positioning boss 35 disposed on the lower box body 22 , and a positioning shaft member 31 penetrating the first positioning boss 34 and the second positioning boss 35 .

[0056] In the present invention, the aligning and sealing is performed by positioning pieces arranged on both sides of the sand box 19, so that the cavity of the upper box body 21 can be more accurately aligned with the cavity of the lower box body 22, thereby forming a whole cavity of the casting, improving product quality and reducing resource waste.

[0057] The lower end of the lower box body 22 is provided with a bracket body 20 in cooperation with the positioning shaft member 31 .

[0058] In the present invention, the bracket body 20 includes a base platform arranged at the lower end of the sand box 19, a four-part support frame cooperating with the base platform and a fixed seat arranged between any two support frames. The fixed seat is divided into three fixed blocks, which are upper fixed blocks detachably connected to the lower end of any support frame, and a lower fixed block is arranged at the lower end of the two fixed blocks. The lower fixed block is used for placement and fixation. An installation component is arranged in the middle of the lower fixed block. In this way, it can be mounted on other equipment for fixed installation, so as to adjust the height of the bracket body 20 and improve the stability of the bracket body 20.

[0059] The bottom surfaces of the upper box body 21 and the lower box body 22 are both made of iron plates.

[0060] In the present invention, the use of iron material can reduce the manufacturing cost of the mold.

[0061] In the present invention, the through holes on the second positioning bosses 35 on both sides of the lower box body 22 are first aligned with the positioning shaft 31 on the bracket body 20, and the lower box body 22 can be placed on the upper end of the fixed seat of the bracket body 20 along the positioning shaft 31, and then the through holes on the first positioning bosses 34 on both sides of the upper box body 21 are also aligned with the positioning shaft 31 on the bracket body 20, and the upper box body 21 is fixed to the upper end of the lower upper body along the positioning shaft 31, and the liquid casting material is aligned with the straight gate 27 of the upper box body 21 and poured in, and the liquid casting material enters the cross gate 28 through the straight gate 27, and then the liquid casting material is introduced into the cavity of the riser 23 through the first inner gate 30, and then flows into the cavity through the second inner gate and fills the two cavities, thereby achieving the casting operation.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulley, characterized in that: The invention comprises a pulley body and a wheel seat coaxially arranged in the pulley body, the wheel seat comprising a first shaft member (1) and a second shaft member (2) coaxially arranged in the first shaft member (1), the pulley body comprising a wheel body (3) and a load-bearing connection component connecting the wheel body (3) and the first shaft member (1), four load-bearing connection components being evenly distributed and arranged around the wheel seat and the wheel body (3); the wheel body (3) comprising a first wheel body (4) coaxially arranged in parallel and a second wheel body (5) having a diameter larger than the first wheel body (4), the load-bearing connection component comprising a first connection component (6) arranged in the first wheel body (4), a second connection component (7) arranged in the second wheel body (5) and a third connection component (8) arranged between the first connection component (6) and the second connection component (7); The first connecting member (6) and the second connecting member (7) both comprise a support frame, a protruding member (9) arranged on the side of the support frame, and a through groove (10) penetrating the support frame and the protruding member (9); the support frame comprises a first frame body (11) connected to the first shaft member (1) and a second frame body (12) connected to the wheel body (3); the cross section of the second frame body (12) is a trapezoidal structure; a first arc chamfer (13) is provided at the connection between the first frame body (11) and the second frame body (12).

2. A pulley according to claim 1, characterized in that: The side portion of the third connecting member (8) connected to the second wheel body (5) is provided with an inclined surface (14), and the connection between the inclined surface (14) and the inner side surface of the second wheel body (5) is provided with a second arc chamfer (15).

3. A pulley according to claim 1, characterized in that: The openings of the first wheel body (4) and the second wheel body (5) are both provided with inwardly facing groove chamfers (16).

4. A pulley according to claim 1, characterized in that: The outer sides of the first wheel body (4) and the second wheel body (5) are both provided with groove rails (17) in parallel.

5. A pulley according to claim 4, characterized in that: The first wheel body (4) has two grooves arranged in parallel, and the cross section of any groove of the first wheel body (4) is an isosceles trapezoid, and the two waist angles of the isosceles trapezoidal groove are 34 degrees. The second wheel body (5) has three grooves arranged in parallel, and the cross section of any groove of the second wheel body (5) is an isosceles trapezoid, and the two waist angles of the isosceles trapezoidal groove of the second wheel body (5) are greater than the two waist angles of the groove of the first wheel body.

6. A casting mold for the pulley according to any one of claims 1 to 5, characterized in that: The invention comprises a sand box (19) and positioning members arranged on both sides of the sand box (19); the sand box (19) comprises an upper box body (21) and a lower box body (22) both of which are provided with upper openings; the bottom surface of the upper box body (21) is provided with a feed end, a riser (23) connected to the feed end, and a first cavity (24) connected to the riser (23) facing upward; the bottom surface of the lower box body (22) is provided with a riser seat (25) matching the riser (23) and a second cavity (26) matching the first cavity (24).

7. The casting mold according to claim 6, characterized in that: The feed end comprises a sprue (27) arranged on the upper box body (21) and a runner (28) matching the sprue (27); the lower box body (22) is provided with a sprue seat (29) matching the sprue (27); and the riser seat (25) is provided with a first inner gate (30) communicating with the sprue (27).

8. The casting mold according to claim 6, characterized in that: The risers (23) are two risers arranged on the diagonal line of the lower box body, and any one of the risers (23) is connected to the first cavity (24) via the second ingates.

9. The casting mold according to claim 6, characterized in that: Any of the positioning members comprises a first positioning boss (34) arranged on the upper box body (21), a second positioning boss (35) arranged on the lower box body (22), and a positioning shaft member (31) penetrating the first positioning boss (34) and the second positioning boss (35), and a bracket body (20) is provided at the lower end of the lower box body (22) in cooperation with the positioning shaft member (31).

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