A screw rod installation structure for a grinding machine

Abstract

The present invention discloses a screw installation structure for a grinder, comprising a support assembly for supporting the rotation of the screw; the support assembly comprises a first support seat and a second support seat, a first roller bearing is arranged in the first support seat, a flange-type sliding sleeve is slidably arranged in the second support seat, and a second roller bearing is arranged in the flange-type sliding sleeve; the flange-type sliding sleeve is connected to the second support seat by a clamping screw and a tension compensation member. Compared with the existing screw installation structure, the screw installation structure for a grinder of the present invention has a small structure size, so that the external overhang of the entire grinding head and the grinding wheel frame is reduced, thereby improving the rigidity and stability of the CNC vertical grinder system; at the same time, it is easy to install, labor-saving and fast when installed on the machine tool. Before installation, the pre-stretching force of the screw is set by the clamping screw and the tension compensation member, so that the stretching amount of the screw can be quantitatively controlled to adapt to the pre-stretching amount of the screw under different working environments.

Description

Technical Field

[0001] The invention relates to the technical field of screw rod installation structures, and in particular to a screw rod installation structure for a grinding machine. Background Art

[0002] CNC machine tools are the main precision cutting tools in modern high-precision manufacturing. The structure of the machine tool affects the accuracy of the machine tool. The transmission accuracy of the screw rod plays an important role in the accuracy of the machine tool and is directly related to the processing accuracy of the machine tool. Therefore, the transmission structure of the machine tool, the accuracy of the bearing, and the thermal deformation of the screw rod directly affect the processing accuracy of the machine tool. Therefore, the installation structure and method of the screw rod and bearing are very important.

[0003] In order to achieve high feed speed and feed accuracy, most of the existing machine tool screw installation structures adopt a fixed installation method at both ends. At the same time, in order to improve the rigidity of the screw and resist thermal deformation during the operation of the screw, some machine tools use a pre-stretching structure when installing the screw. Gaskets are set at both ends of the screw. The screw is stretched by adjusting the thickness of the gasket. The pre-stretching amount is determined by the thickness of the gasket. The pre-stretching amount of the screw is adjusted by adjusting the thickness of the spacer. Once the screw is installed, the stretching amount is difficult to adjust.

[0004] Some machine tools also use a pre-stretching structure with automatic compensation for screw installation. For example, the Chinese utility model patent with publication number CN207788389U discloses a ball screw pre-stretching structure with automatic dynamic compensation, including a ball screw, a head end seat and a tail end seat respectively arranged at the axial ends of the ball screw and rotatably supporting the ball screw, a drive motor with a motor shaft connected to the axial head end of the ball screw, the head end seat including a head end bearing seat and a head end bearing group installed and fixed in the head end bearing seat, the tail end seat including a base, a tail end bearing seat installed on the base and a tail end bearing group installed and fixed in the tail end bearing seat, the tail end bearing seat is slidably connected to the base, and the base is connected to the shaft. A butterfly spring that can preload the ball screw is provided between the bearing seats, a threaded section is provided at the tail end of the ball screw, a locking nut is screwed on the threaded section, a spacer is provided between the locking nut and the tail end bearing group, the spacer is tightly against the tail end bearing group, the head end bearing group includes at least two angular contact bearings installed in pairs, the bearing seat and the bearing end cover installed on the bearing are respectively against the outer ring of the angular contact bearing on the inside and outside; the tail end bearing group includes at least two angular contact bearings installed in pairs, the bearing seat and the bearing end cover installed on the bearing are respectively against the outer ring of the angular contact bearing on the inside and outside; the locking nut is turned to push the bearing seat to move through the spacer and the tail end bearing group, compress the butterfly spring, and realize pre-stretching of the ball screw.

[0005] CNC vertical grinders are different from lathes and milling machines. To ensure machining accuracy and stability, their grinding heads and grinding wheel frames are heavier and installed vertically. Their own gravity acts directly on the screw, which is much greater than the guide rail friction and cutting force on traditional grinders. On this grinder, the following problems exist when using the above-mentioned traditional screw installation structure:

[0006] 1. The grinding head and grinding wheel frame of the machine tool are heavy, and gravity acts directly on the screw. If traditional angular contact bearings are used, the size of the angular contact bearings must be increased to ensure service life, the overhang of the entire grinding head and grinding wheel frame will increase, and the rigidity and stability of the machine tool will be reduced;

[0007] 2. If the traditional stretching structure is used, in order to completely offset the gravity of the grinding head and the grinding wheel frame and the thermal elongation of the screw during processing, the stretching force is much greater than that of the traditional machine tool, and the deformation of the screw is large, which will affect the preload force of the screw nut and the service life of the screw; if the preload force is reduced, the screw is not stretched sufficiently. When the grinding head and the grinding wheel frame are equipped, the elongation of the screw exceeds the preload, and the bottom support of the screw fails, affecting the feed speed and feed accuracy;

[0008] 3. If the traditional self-compensation structure is adopted, the movement of the butterfly spring is not flexible, and the inner hole of the butterfly spring is easy to cause damage and wear to the surface of the screw rod, affecting the service life of the screw rod; the stiffness curve of the butterfly spring is a nonlinear curve, the tensile force of the screw rod is difficult to adjust, and the tensile force changes greatly with the change of compression amount, while the vertical axis of the CNC vertical grinder is a high-speed and heavy-load application occasion, and the tensile force change is required to be small after the screw rod is deformed, so the butterfly spring is not suitable for the vertical grinder, and the nut that compresses the butterfly spring is not easy to tighten when installed vertically, and the installation is inconvenient. Summary of the invention

[0009] The purpose of the present invention is to overcome the above-mentioned shortcomings and to provide a screw installation structure for a grinder. Compared with the existing screw installation structure, the structure has a small size, which reduces the external overhang of the entire grinding head and the grinding wheel frame, thereby improving the rigidity and stability of the CNC vertical grinder system; at the same time, when installed on the machine tool, the installation is simple, labor-saving and quick. Before installation, the pre-stretching force of the screw is set through the coordinated action of the clamping screw, the guide spacer, the clamping spacer and the spring, so that the screw stretching amount can be quantitatively controlled to adapt to the screw pre-stretching amount under different working environments; in addition, the present invention also provides a grinder.

[0010] To achieve the above-mentioned object, the first aspect of the present invention provides the following technical solution: a screw installation structure for a grinding machine, comprising a support assembly for supporting the screw to rotate; the support assembly comprises a first support seat and a second support seat, a flange-type sliding sleeve is slidably provided in the second support seat; one end of the screw is installed in the first support seat, and the other end is installed in the flange-type sliding sleeve;

[0011] The flange type sliding sleeve is connected to the second supporting seat via a clamping screw and a tensile compensating member;

[0012] The flange-type sliding sleeve comprises a sliding sleeve body and a flange ring, one end of the sliding sleeve body is located inside the second support seat, and the other end is located outside the second support seat, and the end of the sliding sleeve body located outside the second support seat is sleeved with the flange ring;

[0013] The stretching compensation part includes a guide spacer installed on the end surface of the second support seat facing away from the first support seat, a clamping spacer installed on the flange ring and arranged opposite to the guide spacer, and an elastic part arranged between the guide spacer and the clamping spacer; the guide spacer and the clamping spacer are fastened and connected by the clamping screw.

[0014] The above-mentioned screw installation structure for a grinding machine, wherein a first roller bearing is provided in the first support seat, a second roller bearing is provided in the flange-type sliding sleeve, one end of the screw is installed in the first support seat through the first roller bearing, and the other end is installed in the flange-type sliding sleeve through the second roller bearing; one end of the screw located in the first support seat is connected to the drive motor through a coupling.

[0015] The above-mentioned screw installation structure for a grinding machine, wherein the side of the flange ring facing the second support seat is a shoulder surface, the side of the flange ring facing away from the second support seat is a flange surface, and the flange surface is flush with the end surface of the sliding sleeve body at one end located outside the second support seat;

[0016] The clamping spacer is installed on the shaft shoulder surface;

[0017] The guide spacer is provided with a first screw mounting hole, the clamping spacer is provided with a second screw mounting hole corresponding to the position of the first screw mounting hole, the flange surface of the flange-type sliding sleeve is provided with a through hole corresponding to the position of the second screw mounting hole, and the clamping screw passes through the through hole and is screwed into the first screw mounting hole and the second screw mounting hole in turn.

[0018] The above-mentioned screw installation structure for a grinding machine, wherein the shoulder on the screw and located in the first support seat is locked and connected to the end face of the first roller bearing through a first locking nut;

[0019] The shaft shoulder on the screw rod and located in the second support seat is locked and connected to the end surface of the second roller bearing through a second locking nut.

[0020] The above-mentioned screw installation structure for a grinding machine, wherein the first roller bearing is fixedly installed in the first support seat by a first fixing screw;

[0021] The second roller bearing is fixedly installed in the flange-type sliding sleeve by a second fixing screw.

[0022] In the above-mentioned screw installation structure for a grinding machine, a first sealing ring is provided between the first roller bearing and the first support seat; and a second sealing ring is provided between the second roller bearing and the flange-type sliding sleeve.

[0023] In the above-mentioned screw installation structure for a grinding machine, the elastic member is a cylindrical helical spring.

[0024] The above-mentioned screw installation structure for a grinder, wherein a first blind hole is provided on the side of the guide spacer facing the clamping spacer, and a second blind hole corresponding to the position of the first blind hole is provided on the side of the clamping spacer facing the guide spacer, and both ends of the cylindrical coil spring are respectively installed in the first blind hole and the second blind hole.

[0025] In the above-mentioned screw installation structure for a grinding machine, one end of the sliding sleeve body located outside the second supporting seat is covered with a sealing cover.

[0026] A second invention of the present invention provides a grinding machine, which includes the above-mentioned screw rod installation structure for a grinding machine.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the screw installation structure for the grinder of the present invention has a smaller structural size than the existing screw installation structure, so that the external overhang of the entire grinding head and the grinding wheel frame is reduced, thereby improving the rigidity and stability of the CNC vertical grinder system; at the same time, when installed on the machine tool, the installation is simple, labor-saving and quick. Before installation, the pre-stretching force of the screw is set through the coordinated action of the clamping screw, the guide spacer, the clamping spacer and the spring, so that the screw stretching amount can be quantitatively controlled to adapt to the screw pre-stretching amount under different working environments; in addition, the force-applying element (cylindrical coil spring) does not directly contact and rub against the screw, and has little effect on the accuracy and life of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional structural schematic diagram of a screw rod installation structure for a grinding machine according to the present invention;

[0029] Figure 2 It is a schematic cross-sectional structure diagram of a screw rod installation structure for a grinding machine according to the present invention;

[0030] Figure 3 for Figure 2 A magnified view of the structure of the middle part A;

[0031] Figure 4 for Figure 2 A magnified view of the structure of the middle B section;

[0032] Figure 5 It is a schematic diagram of the structure of the tensile compensation member in the present invention;

[0033] Figure 6 for Figure 5 A schematic cross-sectional structure diagram of ;

[0034] Figure 7 It is a schematic diagram of the structure of the guide spacer in the present invention;

[0035] Figure 8 It is a schematic diagram of the structure of the compression spacer in the present invention;

[0036] Fig. 9 It is a schematic diagram of the three-dimensional structure of the flange type sliding sleeve in the present invention from a first viewing angle;

[0037] Fig.10 It is a schematic diagram of the three-dimensional structure of the flange type sliding sleeve in the present invention from a second viewing angle;

[0038] Fig.11 It is a schematic diagram of the internal structure of the flange type sliding sleeve in the present invention.

[0039] The corresponding relationship between each mark and component name is as follows:

[0040] Screw 1, screw nut 2, first support seat 3, second support seat 4, first roller bearing 5, second roller bearing 6, flange type sliding sleeve 7, sliding sleeve body 71, flange ring 72, coupling 8, clamping screw 9, clamping spacer 10, guide spacer 11, elastic member 12, first screw mounting hole 13, second screw mounting hole 14, through hole 15, first locking nut 16, second locking nut 17, first fixing screw 18, second fixing screw 19, first sealing ring 20, second sealing ring 21, first blind hole 22, second blind hole 23, sealing cover 24, third locking nut 25. DETAILED DESCRIPTION

[0041] In order to make the technical means for implementing the invention, and to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invented product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Example

[0047] Reference Figure 1 As shown, this embodiment discloses a screw installation structure for a grinding machine, including a screw 1, a support assembly for supporting the screw 1 to rotate, a drive motor for driving the screw 1 to rotate, and a screw nut 2 adapted to the screw 1; the support assembly includes a first support seat 3 and a second support seat 4, a first roller bearing 5 is provided in the first support seat 3, a flange-type sliding sleeve 7 is slidably provided in the second support seat 4, and a second roller bearing 6 is provided in the flange-type sliding sleeve 7.

[0048] Among them, one end of the screw rod 1 is installed in the first support seat 3 through the first roller bearing 5, and the other end is installed in the second support seat 4 through the second roller bearing 6; a coupling 8 is installed at one end of the screw rod 1 located in the first support seat 3, and the screw rod 1 is connected to the driving motor (not shown in the figure) through the coupling 8.

[0049] Specifically, the flange-type sliding sleeve 7 in this embodiment is connected to the second supporting seat 4 through the clamping screw 9 and the tensile compensation piece.

[0050] Specifically, refer to Figure 2 , Fig. 9 , Fig.10 and Fig.11 As shown, the flange-type sliding sleeve 7 in this embodiment includes a sliding sleeve body 71 and a flange ring 72. One end of the sliding sleeve body 71 is located inside the second support seat 4, and the other end is located outside the second support seat 4. The end of the sliding sleeve body 71 located outside the second support seat 4 is sleeved with a flange ring 72. The side of the flange ring 72 facing the second support seat 4 is a shoulder surface, and the side of the flange ring 72 facing away from the second support seat 4 is a flange surface. The flange surface is flush with the end surface of the sliding sleeve body 71 located outside the second support seat 4.

[0051] Reference Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the tensile compensation part includes a clamping spacer 10 installed on the shoulder surface, a guide spacer 11 installed on the end surface of the second support seat 4 facing away from the first support seat 3, and an elastic member 12 arranged between the guide spacer 11 and the clamping spacer 10; the guide spacer 11 and the clamping spacer 10 are fastened together by a clamping screw 9.

[0052] Specifically, refer to Figure 7 and Figure 8 As shown, the guide spacer 11 in this embodiment is provided with a first screw mounting hole 13, the clamping spacer 10 is provided with a second screw mounting hole 14 corresponding to the position of the first screw mounting hole 13, and the flange surface of the flange-type sliding sleeve 7 is provided with a through hole 15 corresponding to the position of the second screw mounting hole 14. The first screw mounting hole 13 and the second screw mounting hole 14 are both adapted to the clamping screw 9. After passing through the through hole 15, the clamping screw 9 is screwed into the first screw mounting hole 13 and the second screw mounting hole 14 in turn.

[0053] Specifically, refer to Figure 2 , Figure 3 and Figure 4 As shown, the shoulder on the screw rod 1 and located in the first support seat 3 in this embodiment is locked and connected to the end face of the first roller bearing 5 through a first locking nut 16; the shoulder on the screw rod 1 and located in the second support seat 4 is locked and connected to the end face of the second roller bearing 6 through a second locking nut 17.

[0054] Specifically, refer to Figure 2 , Figure 3 and Figure 4As shown, in this embodiment, the first roller bearing 5 is fixedly installed in the first support seat 3 by a first fixing screw 18; the second roller bearing 6 is fixedly installed in the flange-type sliding sleeve 7 by a second fixing screw 19.

[0055] In addition, refer to Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, a first sealing ring 20 is provided between the first roller bearing 5 and the first support seat 3 , and a second sealing ring 21 is provided between the second roller bearing 6 and the flange-type sliding sleeve 7 .

[0056] Specifically, the elastic member 12 in this embodiment is a cylindrical helical spring. Figure 7 and Figure 8 As shown, a second blind hole 23 is provided on the side of the clamping spacer 10 facing the guide spacer 11, a first blind hole 22 is provided on the side of the guide spacer 11 facing the clamping spacer 10, and a second blind hole 23 corresponding to the position of the first blind hole 22 is provided on the side of the clamping spacer 10 facing the guide spacer 11, and both ends of the cylindrical coil spring are respectively installed in the first blind hole 22 and the second blind hole 23.

[0057] In addition, refer to Figure 2 As shown, one end of the sliding sleeve body 71 located outside the second support seat 4 is covered with a sealing cover 24 .

[0058] When the screw rod installation structure in this embodiment is used, the first support seat 3 and the second support seat 4 are installed on the bed or the pad.

[0059] The screw rod installation structure in this embodiment is installed in front of the grinding machine, and the clamping screw 9 is tightened. After the screw rod installation structure in this embodiment is installed on the grinding machine, the pre-stretching amount of the screw rod 1 is adjusted by adjusting the tightness of the clamping screw 9.

[0060] The sliding sleeve body 71 in this embodiment is provided with a thread (not shown in the figure) at one end facing the first support seat 3, and the third locking nut 25 is screwed on the thread. The screw mounting structure in this embodiment is installed in front of the grinding machine, and the third locking nut 25 is tightened until its end face is in close contact with the end face of the second support seat 4 facing the first support seat 3. When the screw mounting mechanism in this embodiment is installed on the grinding machine, the third locking nut 25 is loosened so that there is a gap between the end face of the third locking nut 25 and the end face of the second support seat 4.

[0061] Furthermore, the third locking nut 25 in this embodiment is provided with a plurality of screw through holes evenly arranged around the axis on the circumference, and grooves are provided at the screw through holes on the circumference of the third locking nut 25 for installing locking screws. A plurality of positioning grooves are provided along the axial direction on the threaded section on the sliding sleeve body 71. The locking screw is screwed into the screw through hole and then inserted into the positioning groove, thereby fixing the position of the third locking nut 25.

[0062] Compared with the existing screw installation structure, the screw installation structure for the grinder in this embodiment has a smaller structure size, which reduces the external overhang of the entire grinding head and the grinding wheel frame, thereby improving the rigidity and stability of the CNC vertical grinder system; at the same time, it is easy, labor-saving and quick to install on the machine tool. Before installation, the pre-stretching force of the screw 1 is set through the coordinated action of the clamping screw 9, the guide spacer 11, the clamping spacer 10 and the spring, so that the stretching amount of the screw 1 can be quantitatively controlled to adapt to the pre-stretching amount of the screw 1 under different working environments; in addition, the elastic force of the cylindrical helical spring is a linear curve. Within the range of use, the force applied by the cylindrical helical spring is slightly affected by the stretching amount of the screw 1, and the force-applying element (cylindrical helical spring) does not directly contact and rub against the screw 1, which has little effect on the accuracy and life of the screw 1.

[0063] Example 2

[0064] The present embodiment discloses a CNC vertical grinder, including a workbench system and an abrasive belt grinding head. The workbench system includes a workbench and an X-axis screw. The workbench is installed on the X-axis line rail on the top of the frame base through a slider. The workbench is connected to the X-axis nut seat on the X-axis screw. The rear end of the X-axis screw is installed with an X-axis reduction motor. The abrasive belt grinding head includes a polishing frame plate, a head seat, an abrasive belt mechanism and a Z-direction feeding mechanism. The polishing frame plate includes two side frame plates and a top frame plate. The two side frame plates are respectively installed on both sides of the frame base. The top frame plate is installed on the top of the side frame plate. The inner side of the side frame plate is provided with a Z-direction feeding mechanism. The Z-direction feeding mechanism in the present embodiment The feeding mechanism is the screw mounting mechanism disclosed in Example 1, and a head seat is arranged between the two side frame plates, and the head seat is connected to the screw nut on the Z-direction feeding mechanism; a sanding belt mechanism is arranged in the middle of the head seat, and the sanding belt mechanism includes an upper rubber wheel, a lower rubber wheel, a sanding belt and a vertical motor, and the sanding belt is wound around the upper rubber wheel and the lower rubber wheel, and both ends of the upper rubber wheel are installed on the head seat through a bearing seat, one end of the lower rubber wheel is installed on the head seat through a bearing seat, and a sanding belt synchronous wheel is installed on the other end, and the sanding belt synchronous wheel is connected to the motor synchronous wheel through a synchronous belt, and the motor synchronous wheel is installed on the output shaft of the vertical motor, and the vertical motor is installed on the head seat.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw installation structure for a grinding machine, characterized in that: It comprises a support assembly for supporting the rotation of the screw rod; the support assembly comprises a first support seat and a second support seat, a flange-type sliding sleeve is slidably provided in the second support seat; one end of the screw rod is installed in the first support seat, and the other end is installed in the flange-type sliding sleeve; The flange type sliding sleeve is connected to the second supporting seat via a clamping screw and a tensile compensating member; The flange-type sliding sleeve comprises a sliding sleeve body and a flange ring, one end of the sliding sleeve body is located inside the second support seat, and the other end is located outside the second support seat, and the flange ring is sleeved on the end of the sliding sleeve body located outside the second support seat; a threaded section is provided at one end of the sliding sleeve body facing the first support seat, and a plurality of positioning grooves are provided along the axial direction of the threaded section; The stretch compensating member comprises a guide spacer installed on the end surface of the second supporting seat away from the first supporting seat, a clamping spacer installed on the flange ring and arranged opposite to the guide spacer, and an elastic member arranged between the guide spacer and the clamping spacer; the guide spacer and the clamping spacer are fastened and connected by the clamping screw; The elastic member is a cylindrical helical spring.

2. A screw rod installation structure for a grinding machine according to claim 1, characterized in that: A first roller bearing is provided in the first support seat, and a second roller bearing is provided in the flange-type sliding sleeve. One end of the screw rod is installed in the first support seat through the first roller bearing, and the other end is installed in the flange-type sliding sleeve through the second roller bearing; one end of the screw rod located in the first support seat is connected to the drive motor through a coupling.

3. A screw rod installation structure for a grinding machine according to claim 1, characterized in that: The side of the flange ring facing the second support seat is a shaft shoulder surface, and the side of the flange ring facing away from the second support seat is a flange surface, and the flange surface is flush with the end surface of the sliding sleeve body at one end outside the second support seat; The clamping spacer is installed on the shaft shoulder surface; The guide spacer is provided with a first screw mounting hole, the clamping spacer is provided with a second screw mounting hole corresponding to the position of the first screw mounting hole, the flange surface of the flange-type sliding sleeve is provided with a through hole corresponding to the position of the second screw mounting hole, and the clamping screw passes through the through hole and is screwed into the first screw mounting hole and the second screw mounting hole in turn.

4. A screw rod installation structure for a grinding machine as claimed in claim 2, characterized in that: The shaft shoulder on the screw rod and located in the first support seat is locked and connected to the end face of the first roller bearing through a first locking nut; The shaft shoulder on the screw rod and located in the second support seat is locked and connected to the end surface of the second roller bearing through a second locking nut.

5. A screw rod installation structure for a grinding machine as claimed in claim 2, characterized in that: The first roller bearing is fixedly installed in the first support seat by a first fixing screw; The second roller bearing is fixedly installed in the flange-type sliding sleeve by a second fixing screw.

6. A screw rod installation structure for a grinding machine as claimed in claim 2, characterized in that: A first sealing ring is provided between the first roller bearing and the first support seat; a second sealing ring is provided between the second roller bearing and the flange-type sliding sleeve.

7. A screw rod installation structure for a grinding machine according to claim 1, characterized in that: The guide spacer is provided with a first blind hole on the side facing the clamping spacer, and the clamping spacer is provided with a second blind hole corresponding to the position of the first blind hole on the side facing the guide spacer. Both ends of the cylindrical coil spring are respectively installed in the first blind hole and the second blind hole.

8. The screw rod installation structure for a grinding machine according to claim 1, characterized in that: One end of the sliding sleeve body located outside the second supporting seat is covered with a sealing cover.

9. A grinding machine, characterized in that: It comprises a screw rod installation structure for a grinding machine as described in any one of claims 1 to 8.

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