Surface grinding machine

Abstract

The invention relates to the technical field of grinding machines, and discloses a surface grinding machine which comprises a rotary type grinding mechanism and a linkage type pressure applying mechanism. A hollow rotating column which can rotate along with the second butt-joint plate and is in a hollow state, a fifth butt-joint plate which can axially move along the hollow rotating column and rotate along with the hollow rotating column, and a spiral spring which generates downward elastic pressure on the fifth butt-joint plate are arranged in the second butt-joint plate. According to the surface grinding machine, the basic circular motion type grinding effect of the plane grinding disc on the surface of an object is utilized, and the relative motion of the built-in grinding block around the petal-shaped closed sliding groove is combined, so that the grinding block can generate radial reciprocating motion relative to the rotating axis on the surface of the object, and the grinding efficiency of the object is improved; the two kinds of grinding movement are from the same driving motor, and therefore the effective utilization rate of the driving motor can be effectively increased.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding machines, and specifically to a surface grinding machine. Background Art

[0002] A grinding machine is a machine tool that uses a grinding tool to perform grinding on the surface of a workpiece. Most grinding machines use a high-speed rotating grinding wheel for grinding, so that the workpiece can reach the required flatness.

[0003] For example, the Chinese patent with the publication number "CN222114468U" discloses "a surface grinding machine", and its main structure includes a grinding machine and a grinding head. For this surface grinding machine, the grinding head can be quickly installed by inserting a positioning block into the first mounting plate, and the grinding head can be quickly disassembled by reversely rotating the first mounting plate. Without using tools, the replacement speed of the grinding head can be reduced, thereby improving the grinding efficiency.

[0004] However, when the above-mentioned surface grinding machine performs surface grinding on an object, it uses the grinding head to contact the surface of the object, and then makes the grinding head rotate at a high speed, and uses the frictional force between the two to perform surface grinding on the object. The relative friction range between the grinding surface of the grinding head and the object is only the planar area when the grinding head rotates. Therefore, the grinding stroke of the grinding head on the object is only the circular motion during grinding, and its grinding efficiency for the object is relatively low. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a surface grinding machine. By using a surface grinding disc to perform basic circular motion grinding on the surface of an object, and combining the relative motion of the built-in grinding block around the petal-shaped closed chute, the grinding block can generate a radial reciprocating motion relative to the rotation axis of the object, thereby improving the grinding efficiency of the object. In addition, both grinding motions come from the same driving motor, which can effectively improve the effective utilization rate of the driving motor and solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: including a bed fixing plate installed on the upper surface of the bed, a longitudinal vertical plate located just above the bed fixing plate and having a first docking plate installed at the bottom, a curved connecting rod and a horizontal connecting rod installed on one side of the longitudinal vertical plate, a motor fixing sleeve fixedly installed at one end of the horizontal connecting rod, a driving motor installed inside the motor fixing sleeve and located just above the clamping platform of the component in the bed, and a second docking plate fixedly installed at the end of the rotor of the driving motor, and also including a rotary grinding mechanism, which is provided with a rotating and flat surface of the component. A flat grinding disc for rotational grinding, an inner limit plate and an outer limit plate which are in a fixed state and whose outer and inner sides form a petal-shaped closed sliding groove, and a rectangular grinding block which is installed in the flat grinding disc and can slide along the stroke of the petal-shaped closed sliding groove when the flat grinding disc rotates; and a linkage pressure mechanism, which is provided with a hollow rotating column which can rotate with the No. 2 docking plate and is hollow inside, a No. 5 docking plate which can move axially along the hollow rotating column and rotate with the hollow rotating column, and a coil spring which produces downward elastic pressure on the No. 5 docking plate.

[0007] Preferably, the rotary grinding mechanism also includes a fixed shaft sleeve and a longitudinal rotating shaft, the center of the fixed shaft sleeve is provided with a shaft body through hole with two ends in an open state, the bottom outer circumferential surface of the fixed shaft sleeve is provided with an inner limit plate with an integral structure therewith, the shaft body of the longitudinal rotating shaft is inserted into the shaft body through hole, and the top of the longitudinal rotating shaft is provided with a No. 3 docking plate with an integral structure therewith, a horizontal fixed circular plate is fixedly installed on the outer circumferential surface of the fixed shaft sleeve, and an outer limit plate located at the periphery of the inner limit plate and flush with the inner limit plate is fixedly installed on the bottom of the fixed circular plate through a longitudinal fixing rod, and a petal-shaped closed structure is formed between the outer wall surface of the inner limit plate and the inner wall surface of the outer limit plate The cam is an angular groove that is fixed to the top of the sliding plate, and the cam is fixed with a top limit plate that can prevent the longitudinal limit plate from detaching from the petal-shaped closed groove. The upper surface of the cam is fixed with a top limit plate that can prevent the longitudinal limit plate from detaching from the petal-shaped closed groove. The upper surface of the fixed circular plate is fixedly connected to one end of the curved connecting rod.

[0008] Preferably, the petal-shaped closed slide groove forms a limit on the longitudinal limit slide rod so that the rectangular grinding block generates radial reciprocating motion relative to the rotation axis on the surface of the object.

[0009] Preferably, the horizontal width of the petal-shaped closed sliding groove is the same as the structural diameter of the longitudinal limiting sliding rod.

[0010] Preferably, the linkage pressure mechanism further includes a piston body. At the top of the hollow rotating column, there is a fourth docking plate which is of an integral structure with the hollow rotating column and fixedly connected to the bottom end of the second docking plate. Inside the hollow rotating column, there is a longitudinal component moving cavity. At the bottom end of the hollow rotating column, there is a rod perforation communicating the space below it and the bottom end of the longitudinal component moving cavity. Inside the hollow rotating column and within the longitudinal component moving cavity, there is a piston body capable of moving axially along the longitudinal component moving cavity. At the top of the piston body, there is a helical spring in a compressed state. At the bottom end of the piston body, there is a longitudinal telescopic rod fixedly installed through the rod perforation. At the bottom end of the longitudinal telescopic rod, there is a fifth docking plate fixedly connected to the bottom end of the third docking plate.

[0011] Preferably, the cross-sectional structure of the rod perforation is the same as that of the longitudinal telescopic rod, both being polygonal structures, and the cross-sectional dimensions of the rod perforation match those of the longitudinal telescopic rod.

[0012] Preferably, it further includes a working height adjustment mechanism, which internally has a first external threaded rod and a second external threaded rod connected to the ends of the lying bed fixing plate and the first docking plate, a threaded sleeve threadedly connected to the first external threaded rod and the second external threaded rod and capable of changing the distance between the first external threaded rod and the second external threaded rod when rotating, and a polygonal limiting rod inserted at the axes of the first external threaded rod and the second external threaded rod to prevent relative rotation between the first external threaded rod and the second external threaded rod.

[0013] Preferably, the working height adjustment mechanism further includes a first thread structure and a second thread structure. At one end of the threaded sleeve, there is a first internal threaded cavity with an inwardly concave structure. At the other end of the threaded sleeve, there is a second internal threaded cavity with an inwardly concave structure. The rod body of the first external threaded rod is installed inside the first internal threaded cavity through the first thread structure. The rod body of the second external threaded rod is installed inside the second internal threaded cavity through the second thread structure. At the opposite ends of the first external threaded rod and the second external threaded rod, there are inwardly concave polygonal limiting cavities. At the center of the threaded sleeve, there is a fixedly installed polygonal limiting rod inserted into the polygonal limiting cavity. At one end of the first external threaded rod, there is a first connecting plate of an integral structure with it and fixedly connected to the lying bed fixing plate. At one end of the second external threaded rod, there is a second connecting plate of an integral structure with it and fixedly connected to the first docking plate.

[0014] Preferably, the cross-sectional structure of the polygonal limiting cavity is the same as that of the polygonal limiting rod, both being polygonal structures, and the cross-sectional dimensions of the polygonal limiting cavity match those of the polygonal limiting rod.

[0015] Preferably, the first thread structure includes an internal thread structure disposed inside the first internal thread cavity and an external thread structure disposed on the rod body of the first external threaded rod. The second thread structure includes an internal thread structure disposed inside the second internal thread cavity and an external thread structure disposed on the rod body of the second external threaded rod, and the helix direction of the first thread structure is opposite to that of the second thread structure.

[0016] Compared with the prior art, the present invention provides a surface grinder, having the following beneficial effects: By using the planar grinding disc to perform basic circular motion grinding on the surface of an object, and combining with the relative movement of the built-in grinding block around the petal-shaped closed chute, it can make the grinding block generate a radial reciprocating motion relative to the rotation axis of the object, thereby improving the grinding efficiency of the object. In addition, both grinding motions come from the same driving motor, which can effectively improve the effective utilization rate of the driving motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional view of the present invention; Figure 2 is a three-dimensional sectional view of the present invention; Figure 3 is a three-dimensional view of the rotary grinding mechanism in the present invention; Figure 4 is a three-dimensional sectional view of the rotary grinding mechanism in the present invention; Figure 5 is a three-dimensional combined view of the rectangular grinding block, the longitudinal limiting slide rod and the top limiting plate in the present invention; Figure 6 is a three-dimensional sectional view of the linkage pressing mechanism in the present invention; Figure 7 is a three-dimensional sectional view of the working height adjusting mechanism in the present invention; Figure 8 is a three-dimensional view of the polygonal limiting rod in the present invention.

[0018] Wherein: 1. Bed fixing plate; 2. Vertical standing plate; 3. First docking plate; 4. Curved connecting rod; 5. Horizontal connecting rod; 6. Motor fixing sleeve; 7. Driving motor; 8. Second docking plate; 9. Rotating grinding mechanism; 91. Fixed bushing; 92. Shaft body perforation; 93. Fixed circular plate; 94. Inner limiting plate; 95. Longitudinal fixing rod; 96. Outer limiting plate; 97. Petal-shaped closed sliding groove; 98. Longitudinal rotating shaft; 99. Third docking plate; 910. Planar grinding disc; 911. Straight sliding groove; 912. Rectangular grinding block; 913. Longitudinal limiting slide bar; 914. Top limiting plate; 10. Linkage pressing mechanism; 101. Hollow rotating column; 102. Fourth docking plate; 103. Longitudinal component moving cavity; 104. Rod body perforation; 105. Piston body; 106. Helical spring; 107. Longitudinal telescopic rod; 108. Fifth docking plate; 11. Working height adjusting mechanism; 111. Threaded sleeve; 112. First internal thread cavity; 113. Second internal thread cavity; 114. First thread structure; 115. Second thread structure; 116. First external threaded rod; 117. Second external threaded rod; 118. First connecting plate; 119. Second connecting plate; 1110. Polygonal limiting cavity; 1111. Polygonal limiting rod. Detailed implementation manners

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figure 1 and Figure 2 , which includes a bed fixing plate 1 installed on the upper surface of the bed, a vertical standing plate 2 located directly above the bed fixing plate 1 and having a first docking plate 3 installed at the bottom, a curved connecting rod 4 and a horizontal connecting rod 5 installed on one side of the vertical standing plate 2, a motor fixing sleeve 6 fixedly installed at one end of the horizontal connecting rod 5, a driving motor 7 installed inside the motor fixing sleeve 6 and directly above the component clamping table in the middle of the bed, and a second docking plate 8 fixedly installed at the end of the rotor of the driving motor 7. The bed fixing plate 1 is fixedly installed on the upper surface of the bed, and after installation, the planar grinding disc 910 needs to be located directly above the component clamping table. Then, the object to be ground is fixed in the component clamping table, and the planar grinding disc 910 is made to contact the grinding surface of the object. Starting the driving motor 7 can achieve the purpose.

[0021] In order to improve the planar grinding efficiency of the object, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 andFigure 5 , it is necessary to set a rotary grinding mechanism 9, which is internally provided with a flat grinding disc 910 that can rotate and perform rotary grinding on the plane of the component, an inner limiting plate 94 and an outer limiting plate 96 that are in a fixed state and whose outer side and inner side form a petal-shaped closed chute 97, and a rectangular grinding block 912 installed in the flat grinding disc 910 and capable of sliding along the stroke of the petal-shaped closed chute 97 when the flat grinding disc 910 rotates. The longitudinal telescopic rod 107 drives the longitudinal rotating shaft 98 to rotate, and the longitudinal rotating shaft 98 will drive the flat grinding disc 910 to rotate. At this time, the bottom of the flat grinding disc 910 will perform a rotary grinding effect on the upper surface of the object. At the same time, the longitudinal limiting slide rod 913 will rotate with the flat grinding disc 910, and the petal-shaped closed chute 97 will produce a radial limiting effect on the rotation of the longitudinal limiting slide rod 913, causing the rectangular grinding block 912 to perform a reciprocating radial movement relative to the rotation axis while performing a circular motion, so that the object to be ground is subjected to grinding effects in two directions, thereby improving the flat grinding efficiency of the object.

[0022] For the specific structure of the rotary grinding mechanism 9, please refer to Figure 3 , Figure 4 and Figure 5, further comprising a fixed bushing 91 and a longitudinal rotating shaft 98. An axially perforated shaft 92 with both ends open is provided at the center of the fixed bushing 91. An inner limiting plate 94 of an integral structure with the fixed bushing 91 is provided on the outer circumferential surface of the bottom of the fixed bushing 91. The shaft body of the longitudinal rotating shaft 98 is inserted into the axially perforated shaft 92, and a third docking plate 99 of an integral structure with the longitudinal rotating shaft 98 is provided at the top end of the longitudinal rotating shaft 98. A horizontally fixed circular plate 93 is fixedly installed on the outer circumferential surface of the fixed bushing 91. A longitudinal fixing rod 95 is fixedly installed at the bottom of the fixed circular plate 93 to fixedly install an outer limiting plate 96 located outside the inner limiting plate 94 and flush with the inner limiting plate 94. A petal-shaped closed sliding groove 97 is formed between the outer wall surface of the inner limiting plate 94 and the inner wall surface of the outer limiting plate 96. A flat grinding disc 910 of an integral structure with the fixed bushing 91 is provided at the bottom end of the fixed bushing 91. A plurality of horizontally arranged straight sliding grooves 911 in an annular array are provided inside the flat grinding disc 910. A rectangular grinding block 912 capable of axially moving along the straight sliding groove 911 is respectively placed inside each of the straight sliding grooves 911 of the flat grinding disc 910. A longitudinal limiting slide bar 913 passing through the petal-shaped closed sliding groove 97 and capable of sliding along the stroke of the petal-shaped closed sliding groove 97 is fixedly installed on the upper end surface of the rectangular grinding block 912. A top limiting plate 914 capable of preventing the longitudinal limiting slide bar 913 from disengaging from the petal-shaped closed sliding groove 97 is fixedly installed at the top end of the longitudinal limiting slide bar 913. The limiting of the longitudinal limiting slide bar 913 by the petal-shaped closed sliding groove 97 causes the rectangular grinding block 912 to generate a radial reciprocating motion relative to the rotation axis of the object surface. The horizontal width of the petal-shaped closed sliding groove 97 is the same as the structural diameter of the longitudinal limiting slide bar 913. The upper surface of the fixed circular plate 93 is fixedly connected to one end of the curved connecting rod 4.

[0023] In order to realize the supply function of the elastic pressure required for grinding, please refer to Figure 1 , Figure 2 and Figure 6, it is necessary to set up a linkage pressure application mechanism 10, which internally has a hollow rotating column 101 that can rotate with the second docking plate 8 and is hollow inside, a fifth docking plate 108 that can move axially along the hollow rotating column 101 and rotate with the hollow rotating column 101, and a spiral spring 106 that generates a downward elastic pressure on the fifth docking plate 108. When the bottom of the flat grinding disc 910 abuts against the grinding surface of an object, the object to be ground is continuously moved upward through the component clamping table. At this time, the spiral spring 106 will be in a compressed state. At the same time, the spiral spring 106 can also generate a pressure on the flat grinding disc 910. When the rotor drives the hollow rotating column 101 to rotate, since the structural shape of the cross-section of the rod body perforation 104 is the same as that of the cross-section of the longitudinal telescopic rod 107, both are polygonal structures, and the structural size of the cross-section of the rod body perforation 104 matches the structural size of the cross-section of the longitudinal telescopic rod 107, the longitudinal telescopic rod 107 will have a rotation phenomenon, thereby realizing the supply function of the elastic pressure required for grinding and the linkage effect.

[0024] For the specific structure of the linkage pressure application mechanism 10, please refer to Figure 6 , and it further includes a piston body 105. The top of the hollow rotating column 101 is provided with a fourth docking plate 102 that is integrally structured with it and fixedly connected to the bottom end of the second docking plate 8. The inside of the hollow rotating column 101 is provided with a longitudinal component activity cavity 103. The bottom end of the hollow rotating column 101 is provided with a rod body perforation 104 that communicates the space below it and the bottom end of the longitudinal component activity cavity 103. Inside the hollow rotating column 101 and located in the longitudinal component activity cavity 103, there is a piston body 105 that can move axially along the longitudinal component activity cavity 103. The top of the piston body 105 is installed with a spiral spring 106 in a compressed state. The bottom end of the piston body 105 is fixedly installed with a longitudinal telescopic rod 107 that penetrates through the rod body perforation 104. The bottom end of the longitudinal telescopic rod 107 is fixedly installed with a fifth docking plate 108 that is fixedly connected to the bottom end of the third docking plate 99.

[0025] To realize the function of adjusting the working height, please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8, it is necessary to set up a working height adjustment mechanism 11, which is internally provided with a first external threaded rod 116 and a second external threaded rod 117 connected to the end of the lying fixed plate 1 and the first docking plate 3, a threaded sleeve 111 that is threadedly connected to the first external threaded rod 116 and the second external threaded rod 117 and can change the distance between the first external threaded rod 116 and the second external threaded rod 117 when rotating, and a polygonal limiting rod 1111 inserted at the axis of the first external threaded rod 116 and the second external threaded rod 117 and capable of preventing the relative rotation between the first external threaded rod 116 and the second external threaded rod 117. When the threaded sleeve 111 is rotated in a specific direction, since the spiral direction of the first thread structure 114 is opposite to the spiral direction of the second thread structure 115, and during the rotation process, due to the existence of the polygonal limiting rod 1111, the first external threaded rod 116 and the second external threaded rod 117 will not rotate relative to each other. Therefore, the distance between the first external threaded rod 116 and the second external threaded rod 117 will change, thereby realizing the function of adjusting the working height.

[0026] For the specific structure of the working height adjustment mechanism 11, please refer to Figure 7 and Figure 8, further comprising a first threaded structure 114 and a second threaded structure 115. One end of the threaded sleeve 111 is provided with a first internal threaded cavity 112 having an inwardly concave structure, and the other end of the threaded sleeve 111 is provided with a second internal threaded cavity 113 having an inwardly concave structure. The rod body of the first external threaded rod 116 is installed inside the first internal threaded cavity 112 through the first threaded structure 114, and the rod body of the second external threaded rod 117 is installed inside the second internal threaded cavity 113 through the second threaded structure 115. The opposite ends of the first external threaded rod 116 and the second external threaded rod 117 are provided with a polygon limiting cavity 1110 having an inwardly concave structure. A polygon limiting rod 1111 inserted into the polygon limiting cavity 1110 is fixedly installed at the center of the threaded sleeve 111. One end of the first external threaded rod 116 is provided with a first connecting plate 118 integrally formed therewith and fixedly connected to the lying bed fixing plate 1, and one end of the second external threaded rod 117 is provided with a second connecting plate 119 integrally formed therewith and fixedly connected to the first docking plate 3. The structural shape of the cross-section of the polygon limiting cavity 1110 is the same as that of the cross-section of the polygon limiting rod 1111, both being polygon structures, and the structural size of the cross-section of the polygon limiting cavity 1110 matches the structural size of the cross-section of the polygon limiting rod 1111. The first threaded structure 114 includes an internal threaded structure provided inside the first internal threaded cavity 112 and an external threaded structure provided on the rod body of the first external threaded rod 116. The second threaded structure 115 includes an internal threaded structure provided inside the second internal threaded cavity 113 and an external threaded structure provided on the rod body of the second external threaded rod 117, and the spiral direction of the first threaded structure 114 is opposite to the spiral direction of the second threaded structure 115.

[0027] During use, the lying bed fixing plate 1 is fixedly installed on the upper surface of the lying bed, and after installation, it is necessary to make the flat grinding disc 910 located directly above the component clamping table. Then, the object to be ground is fixed in the component clamping table, and the flat grinding disc 910 is made to contact the grinding surface of the object. The driving motor 7 is started. When the rotor drives the hollow rotating column 101 to rotate, the longitudinal telescopic rod 107 will have a rotating phenomenon. The longitudinal telescopic rod 107 drives the longitudinal rotating shaft 98 to rotate, and the longitudinal rotating shaft 98 will drive the flat grinding disc 910 to rotate. At this time, the bottom of the flat grinding disc 910 will perform a rotating grinding effect on the upper surface of the object. At the same time, the longitudinal limiting slide bar 913 will rotate with the flat grinding disc 910, and the petal-shaped closed chute 97 will produce a radial limiting effect on the rotation of the longitudinal limiting slide bar 913, so that the rectangular grinding block 912 can perform a reciprocating radial movement relative to the rotation axis while performing a circular motion, thereby enabling the object to be ground to be ground in two directions, and thus improving the flat grinding efficiency of the object.

[0028] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A surface grinder, comprising a bed fixing plate (1) installed on the upper surface of the bed, a longitudinal vertical plate (2) located directly above the bed fixing plate (1) and having a first docking plate (3) installed at the bottom, a curved connecting rod (4) and a horizontal connecting rod (5) installed on one side of the longitudinal vertical plate (2), a motor fixing sleeve (6) fixedly installed at one end of the horizontal connecting rod (5), a driving motor (7) installed inside the motor fixing sleeve (6) and directly above the clamping table of the middle part of the bed, and a second docking plate (8) fixedly installed at the end of the rotor of the driving motor (7), characterized in that: Further included is a rotary grinding mechanism (9), which internally is provided with a planar grinding disc (910) capable of rotating and performing rotary grinding on the plane of a component, an inner limiting plate (94) and an outer limiting plate (96) in a fixed state, the outer side and the inner side of which form a petal-shaped closed chute (97), and a rectangular grinding block (912) installed in the planar grinding disc (910) and capable of sliding along the stroke of the petal-shaped closed chute (97) when the planar grinding disc (910) rotates; and a linkage pressing mechanism (10), which internally is provided with a hollow rotating column (101) capable of rotating with the second docking plate (8) and in a hollow state inside, a fifth docking plate (108) capable of axially moving along the hollow rotating column (101) and rotating with the hollow rotating column (101), and a helical spring (106) that generates a downward elastic pressure on the fifth docking plate (108).

2. A surface grinder according to claim 1, characterized in that: The rotary grinding mechanism (9) further includes a fixed bushing (91) and a longitudinal rotating shaft (98). A shaft body perforation (92) with both ends open is provided at the center of the fixed bushing (91). An inner limiting plate (94) with an integral structure is provided on the outer circumferential surface of the bottom of the fixed bushing (91). The shaft body of the longitudinal rotating shaft (98) is inserted into the shaft body perforation (92), and a third docking plate (99) with an integral structure is provided at the top of the longitudinal rotating shaft (98). A horizontal fixed circular plate (93) is fixedly installed on the outer circumferential surface of the fixed bushing (91). The bottom of the fixed circular plate (93) is fixedly installed with an outer limiting plate (96) located outside the inner limiting plate (94) and flush with the inner limiting plate (94) through a longitudinal fixing rod (95). A petal-shaped closed chute (97) is formed between the outer wall surface of the inner limiting plate (94) and the inner wall surface of the outer limiting plate (96). A planar grinding disc (910) with an integral structure is provided at the bottom end of the fixed bushing (91). A plurality of straight chutes (911) in a horizontal state and arranged in an annular array are provided inside the planar grinding disc (910). A rectangular grinding block (912) capable of axially moving along the straight chute (911) is placed in each of the straight chutes (911) inside the planar grinding disc (910). A longitudinal limiting slide rod (913) that penetrates through the petal-shaped closed chute (97) and is capable of sliding along the stroke of the petal-shaped closed chute (97) is fixedly installed on the upper end surface of the rectangular grinding block (912). A top limiting plate (914) capable of preventing the longitudinal limiting slide rod (913) from detaching from the petal-shaped closed chute (97) is fixedly installed at the top of the longitudinal limiting slide rod (913). The upper surface of the fixed circular plate (93) is fixedly connected to one end of the curved connecting rod (4).

3. The surface grinder according to claim 2, wherein: The limiting of the longitudinal limiting slide rod (913) formed by the petal-shaped closed chute (97) enables the rectangular grinding block (912) to perform a radial reciprocating motion relative to the rotation axis of the object surface.

4. A surface grinder according to claim 3, characterized in that: The horizontal width of the petal-shaped closed sliding groove (97) is the same as the structural diameter of the longitudinal limiting slide bar (913).

5. A surface grinder according to claim 4, characterized in that: The linkage pressing mechanism (10) further includes a piston body (105). At the top of the hollow rotating column (101), there is a fourth docking plate (102) which is of an integrated structure with the hollow rotating column (101) and is fixedly connected to the bottom end of the second docking plate (8). Inside the hollow rotating column (101), there is a longitudinal component moving cavity (103). At the bottom end of the hollow rotating column (101), there is a rod body through hole (104) that communicates the space below it and the bottom end of the longitudinal component moving cavity (103). Inside the hollow rotating column (101) and within the longitudinal component moving cavity (103), there is a piston body (105) that can move axially along the longitudinal component moving cavity (103). At the top of the piston body (105), there is a helical spring (106) in a compressed state. At the bottom end of the piston body (105), there is a longitudinal telescopic rod (107) that penetrates through the rod body through hole (104). At the bottom end of the longitudinal telescopic rod (107), there is a fifth docking plate (108) that is fixedly connected to the bottom end of the third docking plate (99).

6. A surface grinder according to claim 5, characterized in that: The structural shape of the cross-section of the rod body through hole (104) is the same as that of the cross-section of the longitudinal telescopic rod (107), both being a polygonal structure, and the structural dimensions of the cross-section of the rod body through hole (104) match those of the cross-section of the longitudinal telescopic rod (107).

7. A surface grinder according to any one of claims 1-6, characterized in that: It further includes a working height adjustment mechanism (11), which internally has a first external threaded rod (116) and a second external threaded rod (117) connected to the ends of the lying bed fixing plate (1) and the first docking plate (3), a threaded sleeve (111) that is threadedly connected to the first external threaded rod (116) and the second external threaded rod (117) and can change the distance between the first external threaded rod (116) and the second external threaded rod (117) when rotating, and a polygonal limiting rod (1111) inserted at the axis of the first external threaded rod (116) and the second external threaded rod (117) to prevent relative rotation between the first external threaded rod (116) and the second external threaded rod (117).

8. A surface grinder according to claim 7, wherein: The working height adjusting mechanism (11) further includes a first thread structure (114) and a second thread structure (115). One end of the threaded sleeve (111) is provided with a first internal thread cavity (112) with a concave structure, and the other end of the threaded sleeve (111) is provided with a second internal thread cavity (113) with a concave structure. The rod body of the first external threaded rod (116) is installed inside the first internal thread cavity (112) through the first thread structure (114), and the rod body of the second external threaded rod (117) is installed inside the second internal thread cavity (113) through the second thread structure (115). The opposite ends of the first external threaded rod (116) and the second external threaded rod (117) are provided with a polygonal limiting cavity (1110) with a concave structure. A polygonal limiting rod (1111) inserted into the polygonal limiting cavity (1110) is fixedly installed at the center of the threaded sleeve (111). One end of the first external threaded rod (116) is provided with a first connecting plate (118) which is integrally structured with it and fixedly connected to the lying board fixing plate (1), and one end of the second external threaded rod (117) is provided with a second connecting plate (119) which is integrally structured with it and fixedly connected to the first docking plate (3).

9. A surface grinder according to claim 8, wherein: The structural shape of the cross-section of the polygonal limiting cavity (1110) is the same as that of the cross-section of the polygonal limiting rod (1111), both being polygonal structures, and the structural dimensions of the cross-section of the polygonal limiting cavity (1110) match those of the cross-section of the polygonal limiting rod (1111).

10. A surface grinder according to claim 9, characterized in that: The first thread structure (114) includes an internal thread structure provided inside the first internal thread cavity (112) and an external thread structure provided on the rod body of the first external threaded rod (116). The second thread structure (115) includes an internal thread structure provided inside the second internal thread cavity (113) and an external thread structure provided on the rod body of the second external threaded rod (117), and the helix direction of the first thread structure (114) is opposite to that of the second thread structure (115).

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