CN218363742U - Phase counter-rotating type bearing double-end-face grinding device - Google Patents

Abstract

The utility model discloses a two terminal surface grinder of phase reversal rotating bearing, include: the device comprises a rack, a lower layer grinding mechanism, an upper layer grinding mechanism, a limiting wheel assembly, a grinding driving mechanism, a material blocking ring plate and a material control mechanism; the lower grinding mechanism comprises a lower rotary disc, a lower grinding ring disc, an outer rotary sleeve, an inner rotary sleeve and a material stirring disc, the upper grinding mechanism is located above the lower grinding mechanism, and the upper grinding mechanism comprises a first power push rod, a fixed plate, a floating plate, an elastic piece, an upper rotary disc, an upper grinding ring disc and a spline sleeve. The utility model has the advantages that the material inlet and the material outlet are arranged, so that the feeding and the discharging are convenient, the material stirring disc drives the bearing ring to rotate in the direction opposite to the direction of the upper grinding ring disc and the direction of the lower grinding ring disc during the grinding, the grinding contact rate of the bearing ring can be improved, and the grinding efficiency is improved; when the upper grinding ring disc is contacted with harder materials, the upper grinding ring disc can float up and down effectively through the elastic piece, and abrasion is reduced.

Description

Phase counter-rotating type bearing double-end-face grinding device

Technical Field

The utility model relates to a grinding device technical field, especially a looks counter-rotation formula bearing bi-polar face grinder.

Background

The double-side grinder is a mechanical equipment capable of grinding front and back sides of bearing ring at the same time, and its principle is that the material to be ground and polished is placed on the grinding disk, and the workpiece and grinding disk are relatively run and rubbed so as to attain the goal of grinding and polishing. However, some existing grinding machines have poor grinding treatment effect on bearings, and in the grinding process, the relative operation effect between a workpiece and a grinding disc is not good, so that the required grinding effect can be achieved only by long grinding time.

The patent with publication number CN217317532U discloses a bearing double-sided lapping machine, in which the output end between the lapping motor and the turntable motor rotates reversely, and the toothed column turntable and the lapping turntable are driven by the lapping motor to rotate reversely, so as to achieve the effect of fully lapping the bearing in the bearing lapping cavity. Because the height size dispersion of the part blank is large, and the planeness and the parallelism are different, the upper grinding disc cannot be effectively floated up and down when touching harder materials, the grinding effect of the upper grinding disc on the upper end surface of the bearing sleeve is poor, and certain abrasion can be caused to the rotary disc. Moreover, the device is inconvenient to feed and cannot realize automatic discharge, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a double-end-face polishing apparatus for a phase-counter-rotating bearing.

In order to achieve the above object, the utility model provides a two terminal surfaces grinder of phase reversal rotating type bearing, include:

a frame;

the lower layer grinding mechanism is used for grinding the lower end face of the bearing ring;

the upper-layer grinding mechanism is positioned above the lower-layer grinding mechanism and is used for grinding the upper end face of the bearing sleeve;

the lower-layer grinding mechanism comprises a lower-layer rotating disc, a lower-layer grinding ring disc, an outer rotating sleeve, an inner rotating sleeve and a material stirring disc, the outer rotating sleeve is rotatably installed on the rack through a first bearing, the upper end of the outer rotating sleeve is coaxially and fixedly connected with the lower-layer rotating disc, the lower-layer grinding ring disc is coaxially and fixedly installed on the upper end face of the lower-layer rotating disc, the inner rotating sleeve is rotatably installed on the rack through a second bearing, the inner rotating sleeve is coaxially arranged on the inner side of the outer rotating sleeve, the outer rotating sleeve is in transmission connection with the inner rotating sleeve, the rotating directions of the outer rotating sleeve and the inner rotating sleeve are opposite, the top of the inner rotating sleeve is coaxially and fixedly connected with the material stirring disc, and a notch for accommodating a bearing ring is formed in the edge of the material stirring disc;

the upper-layer grinding mechanism comprises a first power push rod, a fixing plate, a floating plate, an elastic part, an upper-layer rotating disc, an upper-layer grinding ring disc and a spline sleeve, the first power push rod is fixedly installed at the top of the frame, the upper end of the fixing plate is fixedly connected with the output end of the first power push rod, the lower end of the fixing plate is connected with the floating plate through the elastic part, the floating plate can move relative to the fixing plate along the axial direction of the first power push rod, the upper-layer rotating disc is rotatably installed on the lower end face of the floating plate through a third bearing, the upper-layer grinding ring disc is coaxially and fixedly installed on the lower end face of the upper-layer rotating disc, the upper-layer grinding ring disc and the lower-layer grinding ring disc are coaxially arranged, and the spline sleeve is coaxially and fixedly installed on the floating plate;

the grinding device also comprises a limiting wheel assembly, a grinding driving mechanism, a material stop ring plate and a material control mechanism;

the limiting wheel assembly is fixedly arranged on the rack and is positioned below the upper rotating disc, and the limiting wheel assembly is used for being in contact fit with the upper rotating disc so as to limit a lower dead point of the upper rotating disc;

the grinding driving mechanism comprises a rotary power source and a spline shaft, the spline shaft is rotatably installed on the rack through a fourth bearing, the spline shaft is coaxially arranged on the inner side of the inner rotating sleeve and is in key connection with the spline sleeve, the rotary power source is in transmission connection with the spline shaft, the outer rotating sleeve and the inner rotating sleeve, and the rotating directions of the spline shaft and the inner rotating sleeve are opposite;

the material blocking ring plate is fixedly connected with the rack, and a material inlet and a material outlet are formed in the material blocking ring plate;

the material control mechanism comprises a second power push rod and a material control plate, the second power push rod is hinged with the rack, the material control plate is hinged with the material blocking ring plate, and the second power push rod drives the material control plate to move so that the material control plate opens and closes the material inlet and the material outlet.

Furthermore, the upper grinding mechanism further comprises a guide rod, the lower end of the guide rod is fixedly connected with the floating plate, the guide rod is connected with the fixed plate and the rack in a sliding mode, and a limiting ring is fixed on the guide rod.

Furthermore, the elastic part is a pressure spring which is sleeved on the guide rod.

Furthermore, the lower-layer grinding mechanism further comprises a transmission shaft, a cylindrical gear, an outer gear ring and an inner gear ring, the transmission shaft is rotatably mounted on the rack through a fifth bearing, the transmission shaft and the spline shaft are arranged in parallel, the transmission shaft is in transmission connection with the spline shaft, the cylindrical gear is mounted on the transmission shaft, the inner gear ring is fixedly mounted on the inner side of the outer rotary sleeve, the outer gear ring is fixedly mounted on the outer side of the inner rotary sleeve, and the cylindrical gear is in meshing connection with the inner gear ring and the outer gear ring.

Furthermore, the transmission shaft is in transmission connection with the spline shaft through a belt transmission assembly.

Furthermore, a first bevel gear is installed at the rotating output end of the rotating power source, a second bevel gear is installed at the lower end of the spline shaft, and the first bevel gear is in meshed connection with the second bevel gear.

Furthermore, the material control mechanism further comprises a third power push rod, the third power push rod is fixedly installed on the rack, a discharging rod is installed at the output end of the third power push rod, the bottom of the discharging rod is higher than the top of the material stirring disc, and the third power push rod drives the discharging rod to enter and exit the material inlet and outlet.

Compared with the prior art, the technical scheme has the following beneficial effects:

1. through the arrangement of the material inlet and the material outlet, the bearing rings can be conveniently input into the notches by the conveyor, the spline shaft is driven to rotate by the rotation power source matched with the material inlet and the material outlet, and the material stirring plate is further driven to rotate, so that the bearing rings are stored in the notches, and the quick feeding is convenient to realize; the second power push rod drives the material control plate to move, so that the material control plate closes the material inlet and the material outlet, an annular limiting space is formed by the material control plate and the material stop ring plate, the bearing ring is limited from moving out of the lower-layer grinding disc, and the normal grinding operation is ensured;

2. the material stirring disc drives the bearing ring to rotate in the direction opposite to the direction of the upper grinding ring disc and the lower grinding ring disc, so that the grinding contact rate of the bearing ring can be improved, and the grinding efficiency is improved;

3. when the upper grinding ring disc is contacted with a harder material, the upper grinding ring disc can effectively float up and down through the elastic piece, so that the abrasion is reduced;

4. through third power push rod drive discharge arm entering motion material import and export, rotary power source drive lower floor rotary disk rotates, and the discharge arm contacts with the bearing ring, goes out the bearing ring by the guide of material import and export, realizes automatic discharge.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is another state diagram of FIG. 2;

FIG. 4 is a diagram illustrating the working state of the present invention;

FIG. 5 is a schematic view of a portion of a lower polishing mechanism;

in the figure, 1, a frame; 2. a lower layer grinding mechanism; 21. a lower layer rotating disc; 22. a lower grinding ring disc; 23. an outer rotating sleeve; 24. an inner rotating sleeve; 25. a material stirring disc; 251. a notch; 26. a drive shaft; 261. a cylindrical gear; 27. an outer ring gear; 28. an inner gear ring; 29. a belt drive assembly; 3. an upper layer grinding mechanism; 31. a first power push rod; 32. a fixing plate; 33. a floating plate; 34. an elastic member; 35. an upper layer rotating disc; 36. an upper layer grinding ring disc; 37. a spline sleeve; 38. a guide rod; 39. a limiting ring; 4. a limit wheel assembly; 5. a grinding drive mechanism; 51. a source of rotational power; 52. a spline shaft; 53. a first bevel gear; 54. a second bevel gear; 6. a material blocking ring plate; 61. a material inlet and a material outlet; 7. a material control mechanism; 71. a second power push rod; 72. a material control plate; 73. a third power push rod; 74. a discharge rod; 8. and (4) bearing rings.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

Referring to fig. 1 to 5, in an embodiment of the present invention, a phase-reversal rotating type bearing dual-end grinding device includes: the grinding machine comprises a frame 1, a lower-layer grinding mechanism 2, an upper-layer grinding mechanism 3, a limiting wheel assembly 4, a grinding driving mechanism 5, a material stop ring plate 6 and a material control mechanism 7;

specifically, the lower polishing mechanism 2 is used for polishing the lower end surface of the bearing ring 8; the lower-layer grinding mechanism 2 comprises a lower-layer rotating disc 21, a lower-layer grinding ring disc 22, an outer rotating sleeve 23, an inner rotating sleeve 24 and a material stirring disc 25, the outer rotating sleeve 23 is rotatably mounted on the rack 1 through a first bearing, the upper end of the outer rotating sleeve 23 is coaxially and fixedly connected with the lower-layer rotating disc 21, the lower-layer grinding ring disc 22 is coaxially and fixedly mounted on the upper end face of the lower-layer rotating disc 21, the inner rotating sleeve 24 is rotatably mounted on the rack 1 through a second bearing, the inner rotating sleeve 24 is coaxially arranged on the inner side of the outer rotating sleeve 23, the outer rotating sleeve 23 is in transmission connection with the inner rotating sleeve 24, the rotating directions of the outer rotating sleeve 23 and the inner rotating sleeve 24 are opposite, the top of the inner rotating sleeve 24 is coaxially and fixedly connected with the material stirring disc 25, and a notch 251 used for accommodating the bearing ring 8 is formed in the edge of the material stirring disc 25;

the upper layer grinding mechanism 3 is positioned above the lower layer grinding mechanism 2, and the upper layer grinding mechanism 3 is used for grinding the lower end face of the bearing ring 8; the upper-layer grinding mechanism 3 comprises a first power push rod 31, a fixed plate 32, a floating plate 33, an elastic member 34, an upper-layer rotating disc 35, an upper-layer grinding ring disc 36 and a spline sleeve 37, the first power push rod 31 is fixedly arranged at the top of the rack 1, the upper end of the fixed plate 32 is fixedly connected with the output end of the first power push rod 31, the lower end of the fixed plate 32 is connected with the floating plate 33 through the elastic member 34, the floating plate 33 can move relative to the fixed plate 32 along the axial direction of the first power push rod 31, the upper-layer rotating disc 35 is rotatably arranged on the lower end face of the floating plate 33 through a third bearing, the upper-layer grinding ring disc 36 is coaxially and fixedly arranged on the lower end face of the upper-layer rotating disc 35, the upper-layer grinding ring disc 36 and the lower-layer grinding ring disc 22 are coaxially arranged, and the spline sleeve 37 is coaxially and fixedly arranged on the floating plate 33;

the limiting wheel assembly 4 is fixedly mounted on the rack 1 and is positioned below the upper rotating disc 35, and the limiting wheel assembly 4 is used for being in contact fit with the upper rotating disc 35 to limit a lower dead point of the upper rotating disc 35;

the grinding driving mechanism 5 comprises a rotary power source 51 and a spline shaft 52, the spline shaft 52 is rotatably mounted on the frame 1 through a fourth bearing, the spline shaft 52 is coaxially arranged at the inner side of the inner rotary sleeve 24, the spline shaft 52 is in key connection with the spline sleeve 37, the rotary power source 51 is in transmission connection with the spline shaft 52, the outer rotary sleeve 23 and the inner rotary sleeve 24, and the rotation directions of the spline shaft 52 and the inner rotary sleeve 24 are opposite; the rotary power source 51 is a variable frequency motor or a speed reducing motor;

the material blocking ring plate 6 is fixedly connected with the frame 1, and a material inlet and a material outlet 61 are formed in the material blocking ring plate 6; the material blocking ring plate 6 can limit the bearing ring 8 to move out of the lower layer grinding mechanism 2 during grinding; the material can be loaded and unloaded through the material inlet and outlet 61.

The material control mechanism 7 comprises a second power push rod 71 and a material control plate 72, the second power push rod 71 is hinged with the rack 1, the material control plate 72 is hinged with the material stop ring plate 6, and the second power push rod 71 drives the material control plate 72 to move, so that the material control plate 72 opens and closes the material inlet and outlet 61.

Furthermore, in order to enable the floating plate 33 to move stably and linearly relative to the fixed plate 32, the upper grinding mechanism 3 further comprises a guide rod 38, the lower end of the guide rod 38 is fixedly connected with the floating plate 33, the guide rod 38 is slidably connected with the fixed plate 32 and the machine frame 1, and a limit ring 39 is fixed on the guide rod 38. And the elastic member 34 is a compression spring which is fitted around the guide rod 38. In the present embodiment, two guide rods 38 and two compression springs are provided. The retainer ring 39 can serve as a connecting member, so that when the fixed plate 32 is lifted, the guide rod 38 and the floating plate 33 are lifted by being abutted against the retainer ring 39.

Further, in order to enable the outer rotating sleeve 23 and the inner rotating sleeve 24 to be in transmission connection and synchronously and reversely rotate, the lower-layer grinding mechanism 2 further comprises a transmission shaft 26, a cylindrical gear 261, an outer gear ring 27 and an inner gear ring 28, the transmission shaft 26 is rotatably installed on the frame 1 through a fifth bearing, the transmission shaft 26 is parallel to the spline shaft 52, the transmission shaft 26 is in transmission connection with the spline shaft 52, the cylindrical gear 261 is installed on the transmission shaft 26, the inner gear ring 28 is fixedly installed on the inner side of the outer rotating sleeve 23, the outer gear ring 27 is fixedly installed on the outer side of the inner rotating sleeve 24, the cylindrical gear 261 is located between the inner gear ring 28 and the outer gear ring 27, and the cylindrical gear 261 is in meshing connection with the inner gear ring 28 and the outer gear ring 27.

Further, in order to drive the transmission shaft 26 to rotate synchronously and synchronously in the same direction as the spline shaft 52, the transmission shaft 26 is in driving connection with the spline shaft 52 through the belt driving assembly 29. The belt driving assembly 29 is composed of two belt pulleys and a driving belt, the two belt pulleys are respectively installed on the spline shaft 52 and the driving shaft 26, and the two belt pulleys are in driving connection through the driving belt.

Further, in order to enable the rotating power source 51 to drive the spline shaft 52 to rotate, a first bevel gear 53 is arranged at the rotating output end of the rotating power source 51, a second bevel gear 54 is arranged at the lower end of the spline shaft 52, and the first bevel gear 53 is in meshed connection with the second bevel gear 54. The rotation power source 51 rotates the first bevel gear 53, and thus the second bevel gear 54 and the spline shaft 52.

Further, in order to realize automatic discharging, the material control mechanism 7 further comprises a third power push rod 73, the third power push rod 73 is fixedly mounted on the frame 1, a discharging rod 74 is mounted at the output end of the third power push rod 73, the bottom of the discharging rod 74 is higher than the top of the material stirring disc 25, and the third power push rod 73 drives the discharging rod 74 to enter and exit the material inlet and outlet 61.

The first power push rod 31, the second power push rod 71 and the third power push rod 73 in the above structure all adopt air cylinders, and other structures can be selected according to needs, such as hydraulic cylinders, electric push rods, gear racks, screw rods and nuts and the like.

In the present embodiment, all the electrical components and the power supplies adapted to the electrical components are connected through wires, and an appropriate controller should be selected according to actual conditions to meet control requirements, specific connection and control sequences.

In this embodiment: a conveyor can be arranged at the material inlet/outlet 61, the bearing ring 8 to be ground is continuously conveyed into the material inlet/outlet 61 and moved to the lower-layer grinding disc through the material inlet/outlet 61, or the bearing ring 8 to be ground can be manually put into the notch 251, and the top of the bearing ring 8 is higher than the top of the material shifting disc 25; the rotation power source 51 is matched with the rotation driving spline shaft 52 to rotate, the spline shaft 52 drives the transmission shaft 26 to rotate through the belt transmission assembly 29, the transmission shaft 26 drives the inner rotary sleeve 24 and the material shifting disc 25 to rotate through the cylindrical gear 261, and therefore the bearing ring 8 is stored in each notch 251;

then, the second power push rod 71 drives the material control plate 72 to move, so that the material control plate 72 closes the material inlet and outlet 61, the material control plate 72 and the material stop ring plate 6 form an annular limiting space, and the bearing ring 8 is limited to move out of the lower-layer grinding disc; the first power push rod 31 drives the fixed plate 32, the floating plate 33, the elastic piece 34, the upper layer rotating disc 35, the upper layer grinding ring disc 36 and the spline sleeve 37 to descend, the floating plate 33 presses the bearing ring 8 tightly, the spline shaft 52 drives the spline sleeve and the floating plate 33 to rotate anticlockwise, the spline shaft 52 drives the transmission shaft 26 to rotate anticlockwise, the transmission shaft 26 drives the outer gear ring 27, the inner rotating sleeve 24 and the material stirring disc 25 to rotate clockwise through the cylindrical gear 261, the transmission shaft 26 drives the inner gear ring 28 and the outer rotating sleeve 23 to rotate anticlockwise through the cylindrical gear 261, so that the material stirring disc 25 drives the bearing ring 8 to rotate in the direction opposite to that of the upper grinding ring disc and the lower grinding ring disc, the grinding contact rate of the bearing ring 8 is improved, and the grinding efficiency is improved;

when the upper grinding ring disc contacts hard materials, the elastic piece 34 can effectively float up and down to reduce abrasion, and when the upper layer rotating disc 35 descends to contact the limiting wheel assembly 4, the lower stop point is reached to finish grinding; the rotation power rotation temporarily stops rotating;

the first power push rod 31 drives the fixed plate 32, the floating plate 33, the elastic piece 34, the upper layer rotating disc 35, the upper layer grinding ring disc 36 and the spline sleeve 37 to ascend and reset, the second power push rod 71 drives the material control plate 72 to move, and the material control plate 72 opens the material inlet and outlet 61;

the third power push rod 73 drives the discharging rod 74 to enter the moving material inlet and outlet 61, the rotary power source 51 is driven again to drive the lower rotating disc 21 to rotate, the discharging rod 74 is in contact with the bearing ring 8, and the bearing ring 8 is guided out through the material inlet and outlet 61, so that automatic discharging is realized.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Claims (7)

1. The utility model provides a two terminal surfaces grinder of phase reversal rotating type bearing, includes:

a frame (1);

the lower-layer grinding mechanism (2) is used for grinding the lower end face of the bearing ring (8);

the upper-layer grinding mechanism (3) is positioned above the lower-layer grinding mechanism (2) and is used for grinding the upper end surface of the bearing ring (8);

the grinding mechanism is characterized in that the lower-layer grinding mechanism (2) comprises a lower-layer rotating disk (21), a lower-layer grinding ring disk (22), an outer rotating sleeve (23), an inner rotating sleeve (24) and a material stirring disk (25), wherein the outer rotating sleeve (23) is rotatably installed on the rack (1) through a first bearing, the upper end of the outer rotating sleeve (23) is coaxially and fixedly connected with the lower-layer rotating disk (21), the lower-layer grinding ring disk (22) is coaxially and fixedly installed on the upper end face of the lower-layer rotating disk (21), the inner rotating sleeve (24) is rotatably installed on the rack (1) through a second bearing, the inner rotating sleeve (24) is coaxially arranged on the inner side of the outer rotating sleeve (23), the outer rotating sleeve (23) is in transmission connection with the inner rotating sleeve (24), the rotating direction of the outer rotating sleeve (23) and the inner rotating sleeve (24) is opposite, the top of the inner rotating sleeve (24) is coaxially and fixedly connected with the material stirring disk (25), and a notch (251) for accommodating a bearing ring (8) is formed in the edge of the material stirring disk (25);

the upper-layer grinding mechanism (3) comprises a first power push rod (31), a fixed plate (32), a floating plate (33), an elastic piece (34), an upper-layer rotating disc (35), an upper-layer grinding ring disc (36) and a spline sleeve (37), wherein the first power push rod (31) is fixedly installed at the top of the rack (1), the upper end of the fixed plate (32) is fixedly connected with the output end of the first power push rod (31), the lower end of the fixed plate (32) is connected with the floating plate (33) through the elastic piece (34), the floating plate (33) can move relative to the fixed plate (32) along the axial direction of the first power push rod (31), the upper-layer rotating disc (35) is rotatably installed on the lower end face of the floating plate (33) through a third bearing, the upper-layer grinding ring disc (36) is coaxially and fixedly installed on the lower end face of the upper-layer rotating disc (35), the upper-layer grinding ring disc (36) and the lower-layer grinding ring disc (22) are coaxially arranged, and the spline sleeve (37) is coaxially and fixedly installed on the floating plate (33);

the grinding machine also comprises a limiting wheel assembly (4), a grinding driving mechanism (5), a material blocking ring plate (6) and a material control mechanism (7);

the limiting wheel assembly (4) is fixedly mounted on the rack (1) and is positioned below the upper-layer rotating disc (35), and the limiting wheel assembly (4) is used for being in contact fit with the upper-layer rotating disc (35) to limit a lower dead point of the upper-layer rotating disc (35);

the grinding driving mechanism (5) comprises a rotary power source (51) and a spline shaft (52), the spline shaft (52) is rotatably mounted on the rack (1) through a fourth bearing, the spline shaft (52) is coaxially arranged on the inner side of the inner rotary sleeve (24), the spline shaft (52) is in key connection with the spline sleeve (37), the rotary power source (51) is in transmission connection with the spline shaft (52), the outer rotary sleeve (23) and the inner rotary sleeve (24), and the rotation directions of the spline shaft (52) and the inner rotary sleeve (24) are opposite;

the material blocking ring plate (6) is fixedly connected with the rack (1), and a material inlet and a material outlet (61) are formed in the material blocking ring plate (6);

the material control mechanism (7) comprises a second power push rod (71) and a material control plate (72), the second power push rod (71) is hinged with the rack (1), the material control plate (72) is hinged with the material stop ring plate (6), and the second power push rod (71) drives the material control plate (72) to move so that the material control plate (72) opens and closes the material inlet and outlet (61).

2. The apparatus according to claim 1, wherein the upper grinding mechanism (3) further comprises a guide rod (38), the lower end of the guide rod (38) is fixedly connected to the floating plate (33), the guide rod (38) is slidably connected to the fixed plate (32) and the frame (1), and a limit ring (39) is fixed to the guide rod (38).

3. The apparatus of claim 1, wherein the resilient member (34) is a compression spring that is mounted on the guide rod (38).

4. The opposite-rotation type bearing double-end-face grinding device according to claim 1, wherein the lower grinding mechanism (2) further comprises a transmission shaft (26), a cylindrical gear (261), an outer gear ring (27) and an inner gear ring (28), the transmission shaft (26) is rotatably mounted on the frame (1) through a fifth bearing, the transmission shaft (26) is parallel to the spline shaft (52), the transmission shaft (26) is in transmission connection with the spline shaft (52), the cylindrical gear (261) is mounted on the transmission shaft (26), the inner gear ring (28) is fixedly mounted on the inner side of the outer rotating sleeve (23), the outer gear ring (27) is fixedly mounted on the outer side of the inner rotating sleeve (24), and the cylindrical gear (261) is in meshing connection with the inner gear ring (28) and the outer gear ring (27).

5. The apparatus of claim 4, wherein the drive shaft (26) is drivingly connected to the spline shaft (52) by a belt drive assembly (29).

6. The opposite-rotation type bearing double-end-face grinding device according to claim 1, wherein a first bevel gear (53) is mounted at the rotation output end of the rotation power source (51), a second bevel gear (54) is mounted at the lower end of the spline shaft (52), and the first bevel gear (53) is in meshed connection with the second bevel gear (54).

7. The opposite-rotation type bearing double-end-face grinding device according to claim 1, wherein the material control mechanism (7) further comprises a third power push rod (73), the third power push rod (73) is fixedly installed on the frame (1), a discharge rod (74) is installed at the output end of the third power push rod (73), the bottom height of the discharge rod (74) is higher than the top height of the material stirring disc (25), and the third power push rod (73) drives the discharge rod (74) to enter and exit the material inlet/outlet (61).

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