A disc harrow shaft seat

Abstract

The present invention discloses a disc harrow shaft seat, belonging to the technical field of disc harrows. It includes a cast iron shaft seat, a radial load guiding unit, a composite load unit, a limiting platform, an end core shaft guiding member and an intermediate core shaft. A flange seat is integrally formed at the top of the cast iron shaft seat; flange rings are integrally formed at both ends of the cast iron shaft seat; a plurality of positioning blocks are integrally formed in the middle of the inner side of the cast iron shaft seat, and a plurality of limiting blocks are integrally formed on both sides of the positioning blocks of the cast iron shaft seat; screw holes are provided at the ends of the positioning blocks and the limiting blocks; the radial load guiding unit is clamped and fixed at the positioning blocks; the composite load unit abuts between the positioning blocks and the limiting blocks. The disc harrow shaft seat of the present invention can be directly installed in the middle of the disc harrow main shaft to support and guide the disc harrow main shaft. The radial load guiding unit always centers the middle of the intermediate core shaft and directly bears the axial impact force of the intermediate core shaft through the roller array, enabling the intermediate core shaft to rotate smoothly.

Description

Technical Field

[0001] The present invention specifically relates to a disc harrow shaft seat, belonging to the technical field of disc harrows. Background Art

[0002] In the prior art, nylon tile shaft seats are generally selected for disc harrow shaft seats. Although they have good water and soil resistance, their durability is not high and they cannot bear axial forces; although oil seal protection devices are installed on spherical plain bearings and ordinary radial ball bearings, the waterproof and anti-soil effects are not very ideal. Since the axial force and radial force are very large during the operation of the harrow, the durability cannot meet the requirements either. Therefore, Chinese Patent Grant Publication No.: CN103527642B discloses a disc harrow shaft seat, which includes ears for connecting with the harrow body arranged outside the housing, left and right hand threads arranged at both ends inside the housing, a core shaft arranged inside the housing, a convex edge arranged in the middle of the core shaft, tapered roller bearings respectively installed on both sides of the convex edge, and the tapered roller bearings with a taper are assembled facing each other; double oil seals are installed on the inner sides of the left-handed gland and the right-handed gland, and sealing rings are installed on the outer sides, and then they are sleeved on the core shaft and respectively connected with the tapered roller bearings; and the left-handed gland and the right-handed gland are screwed tightly on the left and right hand threads of the housing; this structure can reduce the repair and maintenance during production work. However, when the above structure is subjected to axial force, the middle of the core shaft collides with the tapered roller bearing, and the outer edge of the middle of the core shaft is slightly deformed, which will directly cause the main shaft of the disc harrow to rotate stuck. When the deformation amount is too large, the core shaft will be directly locked. In addition, the core shaft rotates through the tapered roller bearing for guiding throughout the process, which is likely to cause hard friction and wear between the core shaft and the tapered roller bearing; in addition, due to the influence of the perforation structure of the core shaft, the tapered roller bearing of the above structure is directly fitted and installed with the end of the disc harrow main shaft. Since a row of disc harrows need to be installed on the main shaft of the disc harrow and the main shaft is relatively long, during operation, it bears the impact force of all the disc harrows on the main shaft. Therefore, if only the bearing assembly is installed at the end of the main shaft, the main shaft will be deformed in the middle or one of the bearing assemblies at both ends will be eccentrically worn due to the length of the main shaft and the impact load of the disc harrows. Summary of the Invention

[0003] To solve the above problems, the present invention provides a disc harrow shaft seat, which can be directly installed in the middle of the disc harrow main shaft to support and guide the disc harrow main shaft. The radial load guiding unit always centers the middle of the middle core shaft, and directly bears the axial impact force of the middle core shaft through the roller array, so that the middle core shaft rotates smoothly.

[0004] The disc harrow shaft seat of the present invention includes:

[0005] Cast iron shaft seat, with a flange seat integrally formed at the top of the cast iron shaft seat; flange rings are integrally formed at both ends of the cast iron shaft seat; a plurality of positioning blocks are integrally formed in the middle of the inner side of the cast iron shaft seat, and a plurality of limiting blocks are integrally formed on both sides of the positioning blocks of the cast iron shaft seat; screw holes are provided at the ends of the positioning blocks and the limiting blocks;

[0006] Radial load guiding unit, which is clamped and fixed at the positioning block;

[0007] Compound load unit, which abuts between the positioning block and the limiting block; a reduced diameter port is provided inside the compound load unit; a roller array is rotatably arranged inside the reduced diameter port;

[0008] Limiting platform, the limiting platform includes a flange plate seat fixed to the end of the limiting block, a top pressure ring seat is integrally formed at one end of the flange plate seat, a limiting card seat is integrally formed at the other end of the flange plate seat, and the top pressure ring seat is engaged with the outer wall of the compound load unit;

[0009] End core shaft guiding part, the end core shaft guiding part includes a sealing end fixed to the flange ring, a ball bearing is embedded inside the sealing end; the top pressure ring seat abuts against the outer sleeve of the ball bearing; the flange plate seat abuts against the sealing end; an end core shaft is movably embedded from the outside to the inside at the center of the sealing end, a sealing disc is integrally formed outside the end core shaft, and a plurality of pressure rings that are in rolling fit with the outside of the sealing end are integrally formed inside the sealing disc; a limiting guide ring is fixed to the outside of the end core shaft through a counterbore bolt, and the limiting guide ring abuts against the rotating end of the ball bearing;

[0010] Intermediate core shaft, the intermediate core shaft respectively rolls and abuts against the inside of the radial load guiding unit and the roller array; the intermediate core shaft and the end core shaft pass through the disc harrow shaft, and are integrally fastened by a limiting bolt.

[0011] During assembly, first assemble the end mandrel guide, embed the end mandrel into the center of the sealing end, and make the pressure ring of the sealing disk roll and align with the outside of the sealing end; then embed the ball bearing into the inner side of the sealing end, and sleeve the limit guide ring on the outside of the end mandrel, and fix the limit guide ring to the end mandrel. At this time, the limit guide ring and the rotating end of the ball bearing abut against each other, and the assembly of the end mandrel guide is completed; then, the radial load guide unit is clamped and fixed at the positioning block, and then the middle mandrel is inserted into the inner side of the radial load guide unit, and the composite load unit is installed to the inner side of the cast iron shaft seat, so that the composite load unit abuts against the middle mandrel. When the disc harrow shaft seat needs to be installed to the middle of the disc harrow shaft (the main shaft of the disc harrow), first disassemble the disc harrow, insert the disc harrow shaft into the two end mandrels and the middle mandrel, then, fasten the middle mandrel and the disc harrow shaft as a whole through the limit bolts; and engage the limit seat of the limit table with the outer wall of the composite load unit, and fix the limit table and the limit block through the countersunk bolts; then, dock the end mandrel and the end of the middle mandrel and engage them as a whole; and fasten the end mandrel and the disc harrow shaft as a whole through the limit bolts; finally, fix the end cap and the flange ring through bolts to complete the assembly of the disc harrow shaft seat.

[0012] Further, the intermediate mandrel comprises a first straight section rollingly matched with the radial load guide unit, and the two ends of the first straight section are integrally formed with reduced diameter sections rollingly matched with the roller array; the end of the reduced diameter section is integrally formed with a second straight section; the second straight section and the end mandrel are provided with mutually engaging grooves at one end close to each other; a plurality of countersunk holes are provided on the second straight section and the end mandrel, and the limiting bolts are screwed into the countersunk holes, and the limiting bolts are fixed with the keyways of the disc harrow shaft; the first straight section serves as the central section of the intermediate mandrel, and cooperates with the radial load guide unit to realize rotational guidance and radial load support; reduced diameter sections are arranged on both sides of the first straight section, and the roller array can be used to axially limit the two ends of the intermediate mandrel, resist axial impact and assist rotational guidance; the second straight section cooperates with the end mandrel to realize the assembly of the central mandrel and the end mandrel into one; during installation, the main shaft of the disc harrow is inserted into the intermediate mandrel and the end mandrel, and is fastened to the keyway of the disc harrow shaft as a whole through the limiting bolts; when the disc harrow shaft rotates, the intermediate mandrel and the end mandrel rotate synchronously.

[0013] Furthermore, a collar is sleeved between the second straight line segment and the outside of the end core shaft at the slot; the collar can be embedded in the outside of the slot to assemble the second straight line segment and the end core shaft into one; the collar can rotate along the center of the limit platform.

[0014] Furthermore, the radial load unit includes a radial load bearing. An opening groove is provided on the outside of the radial load bearing. The opening groove is fitted with a positioning block. Ring plate seats are fixed to both ends of the positioning block by bolts. The ring plate seats are in contact with the outer ring of the radial load bearing. A first sliding opening for the movement of a limiting block is provided on the ring plate seat. During installation, the opening groove and the positioning block are fitted together, and the positioning block circumferentially limits the radial load bearing. Then, the ring plate seats are fixed outside the positioning block by bolts. The ring plate seats can encapsulate both ends of the radial load bearing to achieve axial limitation of the radial load bearing.

[0015] Furthermore, the combined load unit includes a pressing column. The pressing column abuts between the positioning block and the limiting block. A reduced-diameter opening is provided inside the pressing column. A roller array arranged in a reduced-diameter shape is provided inside the reduced-diameter opening. A second sliding opening for the movement of a limiting block is provided on the outside of the pressing column. After the second sliding opening first slides through the limiting block, the second sliding opening is then rotated and misaligned with the limiting block. Finally, the limiting card seat is fitted with the second sliding opening. When installing the pressing column, the second sliding opening of the pressing column slides through the limiting block to enable the pressing column to smoothly pass through the second sliding opening. Then, the pressing column is rotated to disengage the second sliding opening from the limiting block, so that the limiting card seat can smoothly enter the second sliding opening. Thus, the pressing column is restricted between the positioning block and the limiting block, which can prevent the pressing column from performing axial movement. The limiting block is supported by the limiting platform and the end seal, and the limiting card seat can limit the circumferential rotation of the pressing column. The circumferential and axial limitation of the pressing column is achieved. A reduced-diameter opening is provided inside the pressing column to serve as the axial and radial impact of the intermediate mandrel. A roller array is provided inside the reduced-diameter opening to receive the impact force of the intermediate mandrel and assist in rotational guidance.

[0016] Furthermore, the roller array includes a cage. Cylindrical rollers are rotatably provided on the cage. The cylindrical rollers respectively abut between the intermediate mandrel and the reduced-diameter opening. The cylindrical rollers are clamped by the cage and sent into the reduced-diameter opening. Then, the intermediate mandrel is inserted into the cage, so that the cylindrical rollers are clamped between the reduced-diameter opening and the slope of the intermediate mandrel. The intermediate mandrel rotates along the cylindrical rollers, and the axial impact force of the intermediate mandrel can be transmitted to the cylindrical rollers.

[0017] Further, the cage includes a first ring seat and a second ring seat. On the mutually approaching surfaces of the first ring seat and the second ring seat, a plurality of positioning pin posts are integrally formed. At the centers of both ends of the cylindrical roller, guide holes are provided, and the guide holes are installed in a rolling manner with the positioning pin posts; connecting columns are fixed between the first ring seat and the second ring seat and the cylindrical roller. The cage can directly hold the cylindrical roller. During installation, the cage and the cylindrical roller can be automatically assembled into one body. Therefore, during assembly, the cage that is held in a tensioned state is formed by fixing the first ring seat, the second ring seat, and the connecting columns. The positioning pin posts of the first ring seat and the positioning pin posts of the second ring seat clamp both ends of the cylindrical roller, and enable the cylindrical roller to rotate freely; during assembly, the cage carrying the cylindrical roller is directly sent to the inside of the reduced-diameter opening. Due to the function of the cage, the cylindrical roller is prevented from detaching from the reduced-diameter opening, so that the slope of the intermediate mandrel can be accurately aligned with the cylindrical roller conveniently.

[0018] Further, the radial load bearing is a self-aligning bearing. The radial load bearing can accept the radial impact force of the intermediate mandrel and can automatically align the intermediate mandrel, ensuring the linearity of the rotation of the intermediate mandrel, avoiding increasing the resistance of the main shaft of the disk harrow and reducing the wear of the intermediate mandrel.

[0019] Further, a plurality of support blocks are integrally formed on the top of the cast iron shaft seat; the flange seat is integrally formed on the top of the support blocks; an oil injection through hole is provided between the support blocks of the cast iron shaft seat; a sealing plate is welded to the outside of the support blocks; an oil replenishment screw hole is provided on the sealing plate, and a sealing bolt is screwed on the oil replenishment screw hole. An oil storage chamber is formed by the cast iron shaft seat, the support blocks, and the flange seat. After the oil storage chamber is filled with oil, the lubricating oil enters the inside of the cast iron shaft seat through the oil injection through hole to lubricate the radial load guiding unit and the composite load unit; when oil replenishment is required, the sealing bolt is unscrewed, and oil is replenished into the oil storage chamber through the oil replenishment screw hole; after the oil replenishment is completed, the sealing bolt is screwed tightly again.

[0020] Further, two mutually engaging first open covers and second open covers are fixed to the outside of the sealing end; the first open cover has an upward opening, and the second open cover has a downward opening; the first open cover is arranged inside the second open cover; a scraper is fixed to the end of the first open cover and the second open cover, and the scraper fits the outer edge of the sealing plate. The first open cover and the second open cover are mutually engaged and cover the outside of the sealing plate, enabling the sealing plate and the end mandrel to rotate freely. When soil is wrapped around the end mandrel, the soil outside the end mandrel can be scraped off by the scraper, preventing it from being brought into the inside of the sealing plate.

[0021] Compared with the prior art, the disc harrow shaft seat of the present invention can be directly installed in the middle of the main shaft of the disc harrow to support and guide the main shaft of the disc harrow, achieving three-point support for the main shaft of the disc harrow, avoiding deformation in the middle of the main shaft or causing eccentric wear of a certain bearing assembly; using a radial load guiding unit as the main rotation guide can continuously center the middle of the intermediate core shaft, and composite load units are arranged on both sides of the radial load guiding unit to achieve auxiliary rotation guidance, which can ensure the rotation linearity and rotation stability; a slope structure is arranged on both sides of the intermediate core shaft and is in direct contact with the roller array of the composite load unit. When the shaft seat is axially impacted, the impact force is directly transmitted to the roller array, without causing deformation of the intermediate core shaft, enabling the intermediate core shaft to rotate smoothly; and through the cooperation of the end seal, end core shaft and sealing disc, the two ends of the cast iron shaft seat are encapsulated, with waterproof and anti-mud effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic diagram of the overall structure of the disc harrow shaft seat of the present invention.

[0023] Figure 2 FIG. is a schematic diagram of the installation structure of the disc harrow shaft seat and the sealing plate of the present invention.

[0024] Figure 3 FIG. is a schematic diagram of the partial cross-sectional structure of the disc harrow shaft seat of the present invention.

[0025] Figure 4 FIG. is a schematic diagram of the cross-sectional structure of the cast iron shaft seat of the present invention along the positioning block.

[0026] Figure 5 FIG. is a schematic diagram of the cross-sectional structure of the cast iron shaft seat of the present invention along the limit block.

[0027] Figure 6 FIG. is a schematic diagram of the structure of the radial load bearing of the present invention.

[0028] Figure 7 FIG. is a schematic diagram of the structure of the ring plate seat of the present invention.

[0029] Figure 8 FIG. is a schematic diagram of the structure of the pressing column of the present invention.

[0030] Figure 9 FIG. is a schematic diagram of the structure of the limit table of the present invention.

[0031] Figure 10 FIG. is a schematic diagram of the structure of the intermediate core shaft of the present invention.

[0032] Figure 11 FIG. is a schematic diagram of the structure of the intermediate core shaft of the present invention.

[0033] Figure 12 FIG. is a schematic diagram of the structure of the first opening cover, the second opening cover and the scraper installed on the disc harrow shaft seat of the present invention.

[0034] Reference numerals: 1, cast iron shaft seat; 2, flange seat; 3, flange ring; 4, positioning block; 5, limit block; 6, reduced diameter port; 7, roller array; 8, limit platform; 9, flange plate seat; 10, pressing ring seat; 11, limit clamping seat; 12, sealing end; 13, ball bearing; 14, end core shaft; 15, sealing plate; 16, pressing ring; 17, limit guide ring; 18, intermediate core shaft; 19, first straight section; 20, reduced diameter section; 21, second straight section; 22, clamping groove; 23, limit bolt; 24, radial load bearing; 25, opening groove; 26, ring plate seat; 27, first sliding port; 28, pressing column; 29, second sliding port; 30, cage; 31, cylindrical roller; 32, first ring seat; 33, second ring seat; 34, positioning pin column; 35, connecting column; 36, support block; 37, oil injection through hole; 38, sealing plate; 39, encapsulation bolt; 40, first opening cover; 41, second opening cover; 42, scraper. Detailed implementation mode

[0035] Embodiment:

[0036] As Figures 1 to 12 shown in the disc harrow shaft seat, comprising:

[0037] A cast iron shaft seat 1, with a flange seat 2 integrally formed at the top of the cast iron shaft seat 1; flange rings 3 integrally formed at both ends of the cast iron shaft seat 1; a plurality of positioning blocks 4 integrally formed in the middle of the inner side of the cast iron shaft seat 1, and a plurality of limit blocks 5 integrally formed on both sides of the cast iron shaft seat 1 at the positioning blocks 4; screw holes are opened at the ends of the positioning blocks 4 and the limit blocks 5;

[0038] A radial load guiding unit, which is clamped and fixed at the positioning block 4;

[0039] A composite load unit, which abuts between the positioning block 4 and the limit block 5; a reduced diameter port 6 is arranged inside the composite load unit; a roller array 7 is rotatably arranged inside the reduced diameter port 6;

[0040] A limit platform 8, the limit platform 8 includes a flange plate seat 9 fixed to the end of the limit block 5, a pressing ring seat 10 integrally formed at one end of the flange plate seat 9, a limit clamping seat 11 integrally formed at the other end of the flange plate seat 9, and the pressing ring seat 10 is clamped with the outer wall of the composite load unit;

[0041] End core shaft guide, the end core shaft guide includes a sealing end 12 fixed to the flange ring 3, and a ball bearing 13 is embedded inside the sealing end 12; the pressing ring seat 10 abuts against the outer sleeve of the ball bearing 13; the flange plate seat 9 abuts against the sealing end 12; an end core shaft 14 is movably embedded from the outside to the inside at the center of the sealing end 12, a sealing plate 15 is integrally formed on the outside of the end core shaft 14, and a plurality of pressing rings 16 that are in rolling fit with the outside of the sealing end 12 are integrally formed on the inside of the sealing plate 15; a limiting guide ring 17 is fixed to the outside of the end core shaft 14 by a counterbore bolt, and the limiting guide ring 17 abuts against the rotating end of the ball bearing 13;

[0042] Intermediate core shaft 18, the intermediate core shaft 18 respectively rolls and abuts against the inside of the radial load guiding unit and the roller array 7; the intermediate core shaft 18 passes through the disc harrow shaft inside the end core shaft 14 and is integrally fastened by a limiting bolt.

[0043] During assembly, first assemble the end core shaft 14 guide. Embed the end core shaft 14 at the center of the sealing end 12 and make the pressing ring 16 of the sealing plate 15 in rolling alignment with the outside of the sealing end 12; then embed the ball bearing 13 inside the sealing end 12, sleeve the limiting guide ring 17 on the outside of the end core shaft 14, and fix the limiting guide ring 17 to the end core shaft 14. At this time, the limiting guide ring 17 and the rotating end of the ball bearing 13 abut against each other to complete the assembly of the end core shaft 14 guide; then, snap and fix the radial load guiding unit at the positioning block 4, then pass the intermediate core shaft 18 through the inside of the radial load guiding unit, and install the composite load unit into the inside of the cast iron shaft seat 1 so that the composite load unit abuts against the intermediate core shaft 18; when it is necessary to install the disc harrow shaft seat in the middle of the disc harrow shaft (the main shaft of the disc harrow), first disassemble the disc harrow, pass the disc harrow shaft through the two end core shafts 14 and the intermediate core shaft 18, and then fasten the intermediate core shaft 18 and the disc harrow shaft into one body by a limiting bolt; and snap the limiting clamping seat 11 of the limiting platform 8 with the outer wall of the composite load unit, and fix the limiting platform 8 and the limiting block 5 by counterbore bolts; then, butt and integrally snap the ends of the end core shaft 14 and the intermediate core shaft 18; and fasten the end core shaft 14 and the disc harrow shaft into one body by a limiting bolt; finally, fix the sealing end 12 and the flange ring 3 by bolts to complete the assembly of the disc harrow shaft seat.

[0044] The intermediate mandrel 18 includes a first straight section 19 that is in rolling fit with the radial load guiding unit. Reduced-diameter sections 20 that are in rolling fit with the roller array 7 are integrally formed at both ends of the first straight section 19. A second straight section 21 is integrally formed at the end of the reduced-diameter section 20. Engaging grooves 22 are provided at the ends of the second straight section 21 and the end mandrel 14 that are close to each other. A plurality of counterbores are provided on the second straight section 21 and the end mandrel 14, and the limit bolts 23 are screwed into the counterbores. The limit bolts 23 are fixed to the keyway of the disc harrow shaft. The first straight section 19 serves as the central section of the intermediate mandrel 18, and together with the radial load guiding unit, it realizes rotational guidance and radial load support. Reduced-diameter sections 20 are provided on both sides of the first straight section 19. The roller array 7 can axially limit both ends of the intermediate mandrel 18, resist axial impact, and assist in rotational guidance. The second straight section 21 and the end mandrel 14 cooperate to assemble the central mandrel and the end mandrel 14 into one body. During installation, the main shaft of the disc harrow is inserted into the intermediate mandrel 18 and the end mandrel 14, and is fastened to the keyway of the disc harrow shaft through the limit bolts 23. When the disc harrow shaft rotates, the intermediate mandrel 18 and the end mandrel 14 rotate synchronously.

[0045] A collar is sleeved outside the second straight section 21 and the end mandrel 14 at the engaging groove 22. The collar can be fitted outside the engaging groove 22 to assemble the second straight section 21 and the end mandrel 14 into one body. The collar can rotate along the center of the limit platform 8.

[0046] The radial load unit includes a radial load bearing 24. An opening groove 25 is provided outside the radial load bearing 24. The opening groove 25 is fitted with the positioning block 4. Ring plate seats 26 are fixed to both ends of the positioning block 4 by bolts. The ring plate seats 26 are in contact with the outer ring of the radial load bearing 24. A first sliding opening 27 for the movable passage of the limit block 5 is provided on the ring plate seat 26. During installation, the opening groove 25 and the positioning block 4 are fitted, and the positioning block 4 circumferentially limits the radial load bearing 24. Then, the ring plate seats 26 are fixed outside the positioning block 4 by bolts. The ring plate seats 26 can encapsulate both ends of the radial load bearing 24 to axially limit the radial load bearing 24.

[0047] The composite load unit includes a pressing column 28 which abuts between a positioning block 4 and a limiting block 5; a reduced-diameter opening 6 is formed inside the pressing column 28; a roller array 7 arranged in a reduced-diameter shape is provided inside the reduced-diameter opening 6; a second sliding opening 29 for passing through the limiting block 5 movably is formed outside the pressing column 28; after the second sliding opening 29 slides through the limiting block 5 first, the second sliding opening 29 is rotated and misaligned with the limiting block 5, and finally the limiting clamping seat 11 is engaged with the second sliding opening 29; when the pressing column 28 is installed, the second sliding opening 29 of the pressing column 28 slides through the limiting block 5 to enable the pressing column 28 to pass through the second sliding opening 29 smoothly. Then, the pressing column 28 is rotated to disengage the second sliding opening 29 from the limiting block 5, so that the limiting clamping seat 11 can enter the second sliding opening 29 smoothly; thus, the pressing column 28 is restricted between the positioning block 4 and the limiting block 5, and axial movement of the pressing column 28 can be prevented. The limiting block 5 is supported by a limiting platform 8 and a sealing end 12, and the limiting clamping seat 11 can limit the circumferential rotation of the pressing column 28; circumferential and axial limiting of the pressing column 28 is realized; a reduced-diameter opening 6 is formed inside the pressing column 28 to serve as axial impact and radial impact of an intermediate mandrel 18; a roller array 7 is arranged inside the reduced-diameter opening 6 to receive the impact force of the intermediate mandrel 18 and assist in rotational guidance.

[0048] The roller array 7 includes a cage 30 on which cylindrical rollers 31 are rotatably arranged; the cylindrical rollers 31 respectively abut between the intermediate mandrel 18 and the reduced-diameter opening 6; the cylindrical rollers 31 are clamped by the cage 30 and sent into the reduced-diameter opening 6. Then, the intermediate mandrel 18 is inserted into the cage 30, so that the cylindrical rollers 31 are clamped between the slope surfaces of the reduced-diameter opening 6 and the intermediate mandrel 18; rotation of the intermediate mandrel 18 along the cylindrical rollers 31 is realized, and the axial impact force of the intermediate mandrel 18 can be transmitted to the cylindrical rollers 31.

[0049] The cage 30 includes a first ring seat 32 and a second ring seat 33. On the mutually approaching surfaces of the first ring seat 32 and the second ring seat 33, a plurality of positioning pin columns 34 are integrally formed. At the centers of both ends of the cylindrical roller 31, guiding holes are provided, and the guiding holes are installed in rolling contact with the positioning pin columns 34. Connecting columns 35 are fixed between the first ring seat 32 and the second ring seat 33 and the cylindrical roller 31. The cage 30 can directly hold the cylindrical roller 31. During installation, the cage 30 and the cylindrical roller 31 can be automatically assembled into one body. Therefore, during assembly, the cage 30 formed by tensioning is fixed by the first ring seat 32, the second ring seat 33 and the connecting columns 35. The positioning pin columns 34 of the first ring seat 32 and the positioning pin columns 34 of the second ring seat 33 clamp both ends of the cylindrical roller 31, and enable the cylindrical roller 31 to rotate freely. During assembly, the cage 30 carrying the cylindrical roller 31 is directly sent into the inner side of the reduced-diameter opening 6. Due to the effect of the cage 30, the cylindrical roller 31 is prevented from detaching from the reduced-diameter opening 6, so that the slope of the intermediate mandrel 18 can be accurately aligned with the cylindrical roller 31 conveniently.

[0050] The radial load bearing 24 is a self-aligning bearing. The radial load bearing 24 can accept the radial impact force of the intermediate mandrel 18 and can automatically align the intermediate mandrel 18, ensuring the linearity of the rotation of the intermediate mandrel 18, avoiding increasing the resistance of the main shaft of the disk harrow and reducing the wear of the intermediate mandrel 18.

[0051] A plurality of support blocks 36 are integrally formed on the top of the cast iron shaft seat 1, and the flange seat 2 is integrally formed on the top of the support blocks 36. Oil injection through holes 37 are provided between the support blocks 36 of the cast iron shaft seat 1. A sealing plate 38 is welded to the outside of the support blocks 36. A supplementary oil screw hole is provided on the sealing plate 38, and a sealing bolt 39 is screwed on the supplementary oil screw hole. An oil storage chamber is formed by the cast iron shaft seat 1, the support blocks 36 and the flange seat 2. After the oil storage chamber is filled with oil, the lubricating oil enters the inside of the cast iron shaft seat 1 through the oil injection through holes 37 to lubricate the radial load guiding unit and the composite load unit. When supplementary oil is required, the sealing bolt 39 is unscrewed, and supplementary oil is injected into the oil storage chamber through the supplementary oil screw hole. After the supplementary oil is completed, the sealing bolt 39 is screwed tightly again.

[0052] Two mutually engaged first open covers 40 and second open covers 41 are fixed outside the sealing disc 15 of the sealing end 12. The first open cover 40 has an upward opening, and the second open cover 41 has a downward opening. The first open cover 40 is arranged inside the second open cover 41. A scraper 42 is fixed to the end of the second open cover 41 by the first open cover 40, and the scraper 42 fits the outer edge of the sealing disc 15. The first open cover 40 and the second open cover 41 are mutually engaged and cover the outside of the sealing disc 15, enabling the sealing disc 15 and the end mandrel 14 to rotate freely. When soil is wrapped on the end mandrel 14, the soil outside the end mandrel 14 can be scraped off by the scraper 42, preventing it from being brought into the inside of the sealing disc 15.

[0053] The above embodiments are only preferred embodiments of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present invention application are included in the scope of the present invention application.

Claims

1. A disc harrow shaft seat, characterized in that: Comprising: A cast iron shaft seat, with a flange seat integrally formed at the top of the cast iron shaft seat; flange rings integrally formed at both ends of the cast iron shaft seat; a plurality of positioning blocks integrally formed in the middle of the inner side of the cast iron shaft seat, and a plurality of limiting blocks integrally formed on both sides of the positioning blocks of the cast iron shaft seat; screw holes are provided at the ends of the positioning blocks and the limiting blocks. A radial load guiding unit, which is clamped and fixed at the positioning block. A composite load unit, which abuts between the positioning block and the limiting block; a reduced-diameter opening is arranged inside the composite load unit; a roller array is rotatably arranged inside the reduced-diameter opening. A limiting platform, which includes a flange disk seat fixed to the end of the limiting block, a pressing ring seat integrally formed at one end of the flange disk seat, a limiting clamping seat integrally formed at the other end of the flange disk seat, and the pressing ring seat is engaged with the outer wall of the composite load unit. An end core shaft guiding member, which includes an end seal fixed to the flange ring, and a ball bearing is embedded inside the end seal; the pressing ring seat abuts against the outer sleeve of the ball bearing; the flange disk seat abuts against the end seal; an end core shaft is movably embedded from outside to inside at the center of the end seal, a sealing disk is integrally formed on the outside of the end core shaft, and a plurality of pressing rings for rolling cooperation with the outside of the end seal are integrally formed on the inside of the sealing disk; a limiting guide ring is fixed to the outside of the end core shaft through a counterbore bolt, and the limiting guide ring abuts against the rotating end of the ball bearing. An intermediate core shaft, which respectively rolls and abuts against the inside of the radial load guiding unit and the roller array; the intermediate core shaft and the end core shaft pass through a disc harrow shaft, and are integrally fastened through a limiting bolt. The radial load guiding unit includes a radial load bearing, an opening groove is provided on the outside of the radial load bearing, the opening groove is fitted with the positioning block, ring plate seats are fixed at both ends of the positioning block through bolts, and the ring plate seats abut against the outer ring of the radial load bearing; a first sliding opening for passing through the limiting block movably is provided on the ring plate seat. The composite load unit includes a pressing column, which abuts between the positioning block and the limiting block; a reduced-diameter opening is arranged inside the pressing column; a roller array arranged in a reduced-diameter shape is arranged inside the reduced-diameter opening; a second sliding opening for passing through the limiting block movably is provided on the outside of the pressing column; after the second sliding opening first slides through the limiting block, the second sliding opening is rotated and misaligned with the limiting block, and finally the limiting clamping seat is engaged with the second sliding opening.

2. The disc harrow shaft seat according to claim 1, wherein: The intermediate core shaft includes a first straight section that rolls and cooperates with the radial load guiding unit, reduced-diameter sections that are integrally formed at both ends of the first straight section and roll and cooperate with the roller array; a second straight section is integrally formed at the end of the reduced-diameter section; mutually engaging card slots are provided at the ends of the second straight section and the end core shaft that are close to each other; a plurality of counterbores are provided on the second straight section and the end core shaft, and the limiting bolt is screwed into the counterbore, and the limiting bolt is fixed to the keyway of the disc harrow shaft.

3. The disc harrow shaft seat according to claim 2, characterized in that: A collar is sleeved on the outside of the second straight section and the end core shaft at the card slot.

4. The disc harrow shaft seat according to claim 1, characterized in that: The roller array includes a cage, and cylindrical rollers are rotatably arranged on the cage; the cylindrical rollers respectively abut between the intermediate core shaft and the reduced-diameter opening.

5. The disc harrow shaft seat according to claim 4, characterized in that: The cage includes a first ring seat and a second ring seat. A plurality of positioning pin columns are integrally formed on one side of the first ring seat and the second ring seat close to each other. Guide holes are opened at the centers of both ends of the cylindrical roller, and the guide holes are installed in a rolling manner with the positioning pin columns; Connecting columns are fixed between the first ring seat and the second ring seat and the cylindrical roller.

6. The disc harrow shaft seat according to claim 1, characterized in that: The radial load bearing is a self-aligning bearing.

7. The disc harrow shaft seat according to claim 1, characterized in that: A plurality of support blocks are integrally formed on the top of the cast iron shaft seat, and the flange seat is integrally formed on the top of the support blocks; An oil injection through hole is opened between the support blocks of the cast iron shaft seat; A sealing plate is welded outside the support blocks; An oil replenishing screw hole is opened on the sealing plate, and a packaging bolt is screwed on the oil replenishing screw hole.

8. The disc harrow shaft seat according to claim 1, characterized in that: Two mutually engaging first open covers and second open covers are fixed outside the sealing end on the sealing disc; The first open cover has an upward opening, and the second open cover has a downward opening; The first open cover is arranged inside the second open cover; A scraper is fixed at the end of the first open cover to the second open cover, and the scraper fits the outer edge of the sealing disc.

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