A left and right grinding guideway ball track collimation device

Abstract

The present invention discloses a left and right grinding guideway ball track collimation device, which includes a base. A sliding seat is provided at the top of the base. A guideway is fixed to the top of the base. A slider that is slidably connected to the guideway is fixed to the bottom of the sliding seat. A collimation track is fixed to the top of the sliding seat. The left and right planes of the collimation track are collimation planes, and the two collimation planes are parallel to each other. A cross frame is provided above the collimation track. A pair of symmetrically arranged mounting seats are fixed to the cross frame. Bearings are installed on both mounting seats. The outer rings of the two bearings are respectively pressed against the two collimation planes. The left and right planes of the sliding seat are the installation planes for the guideway to be machined, and the installation planes for the guideway to be machined are parallel to the collimation planes. The present invention can limit the left and right runout of the sliding seat, thereby greatly improving the parallelism accuracy of the guideway ball tracks on the left and right sides of the sliding seat, and thus greatly improving the running accuracy of the guideway, which is worthy of popularization and application.

Description

Technical Field

[0001] The invention relates to a precision adjustment device, in particular to a left and right grinding guide rail ball track alignment device. Background Art

[0002] Guide rail ballway grinding is an important part of guide rail quality. The current guide rail grinding is to drive the guide rail to be ground to slide along the guide rail direction of the base through the slide, and use the high-speed rotating grinding wheel to slowly grind the ballway during the sliding process of the guide rail. However, the current guide rail processing is due to the up, down, left and right jumps of the sliding slide itself (the traditional guide rail is installed on the top of the slide for grinding. At this time, the up and down jumps affect the parallelism accuracy. When the traditional guide rail to be processed is installed on the left and right of the slide for processing, the guide rail jumps left and right, affecting the parallelism accuracy). The parallelism accuracy of the guide rail ballway of the slide is greater than 1.1 wire, so the parallelism accuracy of the finished guide rail ballway cannot be improved (the guide rail workpiece jumps as the slide jumps up, down, left and right), and it will also be greater than 1.1 wire, and the accuracy of the processed guide rail is difficult to improve. Therefore, there is an urgent need on the market for a device that can greatly improve the parallelism of the guide rail ballway to be processed.

[0003] Chinese utility model patent CN 204868439 U discloses a CNC linear guide groove grinding device, which grinds the guide groove by driving the X-axis worktable slide to move back and forth through a ball screw, and the X-axis worktable slide is slidably connected to the bed through a guide slider, which cannot overcome the limited parallelism accuracy of the guide rail on the bed, resulting in the inability to improve the parallelism accuracy of the guide groove to be processed. Summary of the invention

[0004] The present invention aims to solve the shortcomings of the above-mentioned prior art and provide a left and right grinding guide rail ballway alignment device which can greatly improve the parallelism accuracy of the left and right grinding guide rails and has low cost, thereby meeting the needs of greatly improving the straightness accuracy of the left and right grinding guide rails and reducing the production cost of the enterprise.

[0005] The technical solution adopted by the present invention to solve its technical problems: This left and right grinding guideway ball track collimation device includes a base. A slide seat is provided at the top of the base. A guideway is fixed to the top of the base. A slider that is slidably connected to the guideway is fixed to the bottom of the slide seat. A collimation rail is fixed to the top of the slide seat. The left and right planes of the collimation rail are collimation planes, and the two collimation planes are parallel to each other. A cross frame is provided above the collimation rail. A pair of symmetrically arranged mounting seats are fixed to the cross frame. Bearings are installed on both mounting seats. The bearings are bearings with mounting seats. The outer rings of the two bearings are respectively pressed against the two collimation planes. The left and right planes of the slide seat are the installation planes for the guideway to be processed. The installation plane for the guideway to be processed is parallel to the collimation plane. The functions of the base, slide seat, guideway, and slider here are to enable the slide seat to slide on the base. The functions of the collimation rail, the left and right planes of the collimation rail being collimation planes, the two collimation planes being parallel to each other, the cross frame, the mounting seats, and the bearings here are to limit the left and right jumping degrees when the slide seat runs on the base, so as to ensure that the left and right jumping degrees of the left and right installation planes for the guideway to be processed on the slide seat are limited. Thus, regardless of the parallelism accuracy of the guideway at the top of the base, when the slide seat runs in a reciprocating motion, it will not affect the parallelism accuracy of the left and right installation planes for the guideway to be processed on the slide seat, thereby ensuring that the guideway to be processed installed on the installation plane for the guideway to be processed has a high parallelism accuracy during the processing of the ball track and will not be affected by the parallelism accuracy during the operation of the slide seat, and can greatly increase the parallelism accuracy of the guideway ball track. The function of the two collimation planes being parallel to each other and the installation plane for the guideway to be processed being parallel to the collimation plane is to ensure the absolute parallel synchronization of the collimation plane and the installation plane for the guideway to be processed. Thus, when grinding the ball track of the guideway to be processed, the two bearings are used to laterally limit the collimation rail, ensuring that when the slide seat moves, the left and right jumping of the slide seat is controlled within the parallelism accuracy of the two bearings and the collimation rail. And the parallelism accuracy of the left and right planes (collimation planes) of the collimation rail and the left and right planes (installation planes for the guideway to be processed) of the slide seat is relatively easy to process by grinding. Therefore, by using the collimation rail and the two bearings to limit the left and right positions of the slide seat, the problem of the traditional processing method, which affects the parallelism accuracy of the ball track of the guideway to be ground due to the parallelism accuracy problem of the guideway below the slide rail, can be solved.

[0006] Further improvement: Both bearings are needle roller bearings. The function of using needle roller bearings for the bearings here is that the needles on the needle roller bearings have a large force-bearing area and strong load-bearing capacity, and the operation will be more stable.

[0007] Further improvement: A driving mechanism for driving the slide seat to reciprocate along the guideway direction is installed on the base. The function of the driving mechanism here is to be able to drive the slide seat to reciprocate along the guideway direction, so as to be able to grind the ball track on the guideway to be processed.

[0008] Further improved, the driving mechanism includes a block fixed to the top of the base. A pair of front and rear relatively arranged rotating shafts are rotatably connected to the block. Chain gears are provided at the left and right ends of both rotating shafts. The two chain gears on the front rotating shaft are both fixed to the front rotating shaft, and the two chain gears on the rear rotating shaft are both rotatably connected to the rear rotating shaft. Chains are installed between the two chain gears on the front and rear opposite sides. A rotary channel for the chain to rotate is formed on the block. The two chains are disconnected. Chain coupling seats are fixed to the left and right sides of the front and rear ends of the sliding seat. The disconnection points of the two chains are respectively hinged at each chain coupling seat. Support rods for supporting the chain are fixed to the top surface of the block and the bottom surface of the rotary channel. A speed reducer and a motor are fixed to the block. The output shaft of the speed reducer is fixedly connected coaxially with the front rotating shaft, and the input shaft of the speed reducer is fixedly connected with the motor rotating shaft.The working principle of the driving mechanism here is as follows: When the motor rotates forward, it drives the reducer to operate and drives the rotating shaft at the front end to rotate, thereby driving the two chain gears at the front end rotating shaft to rotate, driving the chain to rotate, and then pulling the slide seat to move slowly in the forward direction (since the ball track on the to-be-processed guide rail is ground by the grinding wheels, the moving speed of the slide seat is relatively slow, so the inertia force of the slide seat is very small). When a small section of the depth and contour of the ball track on the to-be-processed guide rail is ground well, the two grinding wheels will move closer to each other by a small distance (at this time, the to-be-processed guide rail has separated from the two grinding wheels). At this time, the motor rotates in reverse and drives the reducer to rotate in reverse and drives the rotating shaft at the front end to rotate in reverse, thereby pulling the chain at the rear end to pull the slide seat to move slowly in the rearward direction. Since the moving speed of the slide seat is slow and the inertia is small, the turning of the slide seat will not cause too much load on the chain. After the slide seat moves slowly in the rearward direction, the to-be-processed guide rail is reinserted into the position between the two grinding wheels, so as to grind the depth and contour of the ball track on the to-be-processed guide rail again. Repeating the above operations can grind the ball track on the guide rail. Driving the slide seat by the chain can make the length of the to-be-processed guide rail very long. In theory, it can achieve infinite-length processing of the guide rail ball track. This is something that cannot be achieved by the traditional method of driving the slide seat to reciprocate by a lead screw. Using a lead screw to drive the slide seat can only process a short-length guide rail. Because the longer the lead screw is, the more difficult it is to process. After the lead screw reaches a certain length, it cannot be processed. Moreover, due to the action of gravity, the too-long lead screw will bend, resulting in a situation where it cannot operate. Therefore, this solution adopts the method of driving the slide seat to reciprocate by the chain, which can handle the processing of the long guide rail ball track with ease. Moreover, driving the slide seat by the chain is convenient for installation and has a much lower cost compared to the lead screw drive. In order to prevent the long chain from sagging under the influence of gravity during operation and affecting the stable driving of the slide seat (the sagging chain will cause the driven slide seat to jerk, and jerk means the intermittent sudden rush phenomenon that occurs when the slide seat moves), so a support rod is added below the chain, that is, support rods are installed on the top surface of the block and the bottom surface of the rotary channel. The support rods will support the rollers of the chain, thus preventing the long chain from sagging during operation, and ensuring that the slide seat moves smoothly and efficiently; each chain gear is also called a sprocket without a ratchet mechanism.

[0009] Further improved, support plates fixed to the block are provided on the sides of the two chain gears at the rear end. Transverse channel grooves are opened on both support plates. The rotating shaft is fitted at the transverse channel grooves. Radial insertion holes are opened on the left and right sides of the rear end rotating shaft. Threaded rods are inserted into the two insertion holes. Threaded holes are opened on the left and right sides of the rear end of the block. The two threaded rods are respectively threadedly connected to the two threaded holes. Blocking plates located at the front ends of the insertion holes are fixed on the two threaded rods. Nuts located at the front ends of the blocking plates are threadedly connected to the two threaded rods. The functions of the support plates, transverse channel grooves, radial insertion holes, threaded rods, threaded holes, and blocking plates are as follows: They can facilitate the installation of the chain and can also perform tensioning operations on the loose state of the chain after a period of use, so that the service life of the chain is longer. The working principles of chain installation and chain tensioning are as follows: When the chain needs to be installed, the threaded rods can be rotated inward, so that the distance between the front and rear chain gears is reduced, thus facilitating the sleeving of the chain on the front and rear chain gears. After the chain is sleeved, the threaded rods are rotated outward and drive the blocking plates to press and move the rear rotating shaft outward, and the distance between the rear rotating shaft and the front rotating shaft is widened, so that the front and rear chain gears are opened to tension the chain sleeved on the front and rear chain gears. After the chain is tensioned, the nuts are used to lock the threaded rods on the block to prevent the threaded rods from loosening and affecting the tensioning of the chain. When the chain has run for a long time and becomes long and loose, at this time, only need to loosen the nuts, then rotate the threaded rods outward and drive the blocking plates to press and move the rear rotating shaft outward, so that the front and rear rotating shafts can be opened to perform tensioning operations on the long and loose chain. After the tensioning is completed, tighten the nuts again to prevent the threaded rods from loosening again.

[0010] The beneficial effects of the present invention are as follows:

[0011] 1). By using the collimation rail and the two bearings pressed on the left and right planes of the collimation rail, it can be ensured that when the slider slides on the base, the left and right jumps maintain extremely high parallelism. Therefore, the parallelism of the guide rail raceway ground by the grinding wheel is also extremely high. When the processed guide rail is 4 meters long, the parallelism accuracy can be within 0.5 silk.

[0012] 2). The use of needle roller bearings for the bearings can achieve small frictional resistance, large load resistance, compact structure, and high precision.

[0013] 3). The slide seat adopts a chain drive form, which can achieve low cost, convenient installation. When processing a long guide rail, the structure of the chain driving the slide seat to move will be more stable. By driving the slide seat with a chain, the length of the guide rail to be processed can be very long. In theory, it can achieve infinite long processing of the guide rail raceway.

[0014] 4). It is convenient for chain installation and can perform tensioning operations on the chain when it becomes long and loose after long-term use, increasing the service life of the chain and reducing costs. Brief Description of the Drawings

[0015] Figure 1 is a schematic structural view of the present invention;

[0016] Figure 2 is Figure 1 a partially enlarged view of area A of

[0017] Figure 3 is Figure 1 a partially enlarged view of area B of

[0018] Figure 4 is Figure 1 a partially enlarged view of area C of

[0019] Figure 5 is a top view of the driving mechanism in the present invention;

[0020] Figure 6 is Figure 5 a partially enlarged view of area D of

[0021] Figure 7 is a schematic structural view of the chain driving the slide to reciprocate back and forth in the present invention.

[0022] Description of the Reference Numerals: Base 1, Guide Rail 1-1, Slide 2, Slide Block 2-1, Collimation Rail 4, Cross Frame 5, Mounting Seat 6, Bearing 8, Driving Mechanism 9, Block 9-1, Rotating Shaft 9-2, Chain Gear 9-3, Chain 9-4, Roller 9-4a, Chain Link Seat 9-5, Support Rod 9-6, Reducer 9-7, Motor 9-8, Support Plate 9-9, Transverse Channel Groove 9-9a, Threaded Rod 9-10, Stop Plate 9-10a, Nut 9-11, Machined Guide Rail Mounting Plane a, Collimation Plane b, Machined Guide Rail 10, Ball Track 10-1. Detailed Description of the Invention

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the 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.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0025] Referring to the attached drawings: This left and right grinding guideway ball track collimation device includes a base 1. A slide base 2 is provided at the top of the base 1. A guideway 1-1 is fixed to the top of the base 1. A slider 2-1 slidably connected to the guideway 1-1 is fixed to the bottom of the slide base 2. A collimation rail 4 is fixed to the top of the slide base 2. The left and right planes of the collimation rail 4 are collimation planes b, and the two collimation planes b are parallel to each other. A cross frame 5 is provided above the collimation rail 4. A pair of symmetrically arranged mounting seats 6 are fixed on the cross frame 5. Bearings 8 are installed on both mounting seats 6. The bearings 8 are bearings with mounting seats. The outer rings of the two bearings 8 are respectively pressed against the two collimation planes b. The left and right planes of the slide base 2 are the installation planes a for the guideway to be processed, and the installation plane a for the guideway to be processed is parallel to the collimation plane b.

[0026] Both of the two bearings 8 are needle bearings.

[0027] A driving mechanism 9 for driving the slide base 2 to reciprocate along the direction of the guideway 1-1 is installed on the base 1.

[0028] The driving mechanism 9 includes a block 9-1 fixed to the top of the base 1. A pair of front and rear opposite rotating shafts 9-2 are rotatably connected to the block 9-1. Chain gears 9-3 are provided at the left and right ends of the two rotating shafts 9-2. The two chain gears 9-3 on the front rotating shaft 9-2 are both fixed to the front rotating shaft 9-2. The two chain gears 9-3 on the rear rotating shaft 9-2 are both rotatably connected to the rear rotating shaft 9-2. Chains 9-4 are installed between the two chain gears 9-3 on the front and rear opposite sides. A rotary channel 9-1a for the chain 9-4 to rotate is formed on the block 9-1. The two chains 9-4 are disconnected. Chain link seats 9-5 are fixed to the left and right sides of the front and rear ends of the slide base 2. The disconnection points of the two chains 9-4 are respectively hinged at the respective chain link seats 9-5. Support rods 9-6 for supporting the chain 9-4 are fixed to the top surface of the block 9-1 and the bottom surface of the rotary channel 9-1a. A speed reducer 9-7 and a motor 9-8 are fixed to the block 9-1. The output shaft of the speed reducer 9-7 is coaxially fixed with the front rotating shaft 9-2, and the input shaft of the speed reducer 9-7 is fixed to the rotating shaft of the motor 9-8.

[0029] On the sides of the two chain gears 9-3 at the rear end, there are support plates 9-9 fixed on the block 9-1. Transverse channel grooves 9-9a are provided on both support plates 9-9. The rotating shaft 9-2 is fitted at the transverse channel grooves 9-9a. Radial jack holes 9-2a are provided on the left and right sides of the rear-end rotating shaft 9-2. Threaded rods 9-10 are inserted into the two jack holes 9-2a. Threaded holes 9-1b are provided on the left and right sides at the rear end of the block 9-1. The two threaded rods 9-10 are respectively threadedly connected to the two threaded holes 9-1b. On both threaded rods 9-10, there are blocking plates 9-10a located at the front end of the jack holes 9-2a. Nuts 9-11 are threadedly connected to the front ends of the blocking plates 9-10a on both threaded rods 9-10.

[0030] The working principle of the present invention: The left and right two planes (i.e., the collimation plane b) of the collimation rail 4 reach high-precision parallelism through a grinding (grinding) process (i.e., the collimation plane b at the collimation rail 4 is absolutely parallel and synchronous with the installation plane a of the to-be-machined guide rail on the slide block 2, and the collimation rail 4 is at a short distance from the installation plane a of the to-be-machined guide rail on the slide block 2, which can ensure the collimation effect on the two installation planes a of the to-be-machined guide rails on the slide block 2, such as Figure 1 , Figure 2 , Figure 4As shown in the figure), so as to ensure that when the outer rings of the left and right bearings 8 are pressed against the left and right planes (i.e., the collimation plane b) of the collimation rail 4, an absolute zero position (i.e., absolute parallelism) is ensured. Thus, when the driving mechanism 9 drives the slide 2 to move, it can ensure that the left and right runout of the slide 2 is limited by the collimation rail 4 (the left and right runout of the slide 2 is limited to a very small degree). Also, since the to-be-machined guide rail 10 is machined separately on the left and right planes (i.e., the to-be-machined guide rail installation plane a) of the slide 2, as long as the left and right runout of the slide 2 is ensured, the left and right runout of the ball track 10-1 during grinding can be ensured, and then the parallelism accuracy of the guide rail 10 can be ensured. The up and down runout of the slide 2 does not affect the parallelism accuracy of the guide rail ball track because the machining surface of the guide rail ball track is originally vertical. Therefore, the up and down runout of the slide 2 does not affect the parallelism accuracy of the guide rail. The up and down runout and the left and right runout of the slide 2 are caused by the guide rail 1-1. Due to the congenital machining defects of the traditional guide rail, its guide rail parallel accuracy is always above 1.1 silk. Therefore, for the guide rail machined by using the traditional guide rail as the guiding sliding part to drive the slide to move, its parallelism accuracy is also above 1.1 silk. This is the reason why the parallelism accuracy of the traditionally machined guide rail has always been unable to be improved. However, the present invention adopts the collimation rail 4 with absolutely parallel left and right surfaces, and by pressing the outer rings of the two bearings 8 against the left and right planes of the collimation rail 4, when the slide 2 is driven and moves on the traditional guide rail 1-1, the left and right runout of the slide 2 can be restricted, thereby restricting the left and right runout of the to-be-machined guide rail 10 located at the left and right planes (i.e., the to-be-machined guide rail installation plane a) of the slide 2. Furthermore, a high-precision guide rail with a parallelism within 0.5 silk (with a 4-meter-long guide rail as a reference) can be machined. Compared with the traditional guide rail, the parallelism of this guide rail has been improved by several levels. When installing the guide rail machined by the present invention, when high-precision and advanced equipment processes products, the quality and accuracy of the processed products have also been greatly improved; in this solution, the collimation rail 4 can also be installed at the slide 2 first, and then the collimation plane b and the to-be-machined guide rail installation plane a are machined by using the grinding (grinding) process. In this way, the parallel accuracy between the collimation plane b and the to-be-machined guide rail installation plane a is higher (avoiding the accuracy error generated when the collimation rail 4 is installed on the top surface of the slide 2).

[0031] The working principle of the driving mechanism here is as follows: When the motor 9-8 rotates forward, it drives the reducer 9-7 to operate and drives the front-end rotating shaft 9-2 to rotate, thereby driving the two chain gears 9-3 at the front-end rotating shaft 9-2 to rotate, which drives the chain 9-4 to rotate, and then pulls the slide block 2 to move slowly in the front-end direction (since the ball track 10-1 on the to-be-processed guide rail 10 is ground by the grinding wheels, the moving speed of the slide block 2 is relatively slow, so the forward inertia force of the slide block 2 is very small, and when the slide block 2 moves backward, the pulling impact on the chain 9-4 is small). When a small section of the depth and contour of the ball track 10-1 on the to-be-processed guide rail 10 is ground well, the two grinding wheels will move closer to each other by a small distance (at this time, the to-be-processed guide rail 10 has separated from the two grinding wheels). At this time, the motor 9-8 rotates reversely and drives the reducer 9-7 to rotate reversely and drives the front-end rotating shaft 9-2 to rotate reversely, which drives the front-end chain gear 9-3 to rotate reversely (the front-end chain gear 9-3 is welded and fixed at the front-end rotating shaft 9-2, and the rear-end chain gear 9-3 is rotatably connected to the rear-end rotating shaft 9-2), and then drives the chain 9-4 to pull the slide block 2 to move slowly in the rear-end direction. Since the moving speed of the slide block 2 is slow and the inertia is small, the turning of the slide block 2 will not cause excessive load on the chain 9-4. After the slide block 2 moves slowly in the rear-end direction, the to-be-processed guide rail 10 is reinserted into the position between the two grinding wheels and ground by the upper and lower grinding wheels, so as to grind the depth and contour of the ball track 10-1 on the to-be-processed guide rail 10 again. By repeating the above operations, the ball track on the guide rail can be ground. By driving the slide block 2 through the chain 9-4, the length of the to-be-processed guide rail can be very long. In theory, it can achieve infinite-length processing of the guide rail ball track. This is something that the traditional method of driving the slide block to reciprocate by a lead screw cannot achieve. Using a lead screw to drive the slide block 2 can only process a short-length guide rail. Because the longer the lead screw is, the more difficult it is to process and the lower the accuracy is. After the lead screw reaches a certain length, it cannot be processed. Moreover, due to the action of gravity, the too-long lead screw will bend downward, resulting in an inoperable situation. Therefore, this solution adopts the method of driving the slide block 2 to reciprocate through the chain 9-4, which can handle the processing of the long-guide-rail ball track with ease. Moreover, the installation of the chain driving the slide block is convenient, and the cost is much lower than that of the lead screw drive.

[0032] Although the present invention has been illustrated and described with reference to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details may be made within the scope of the claims.

Claims

1. A left and right grinding guideway ball track collimation device, comprising a base (1), a slide seat (2) is arranged at the top end of the base (1), a guideway (1-1) is fixed at the top end of the base (1), and a slider (2-1) which is slidably connected with the guideway (1-1) is fixed at the bottom of the slide seat (2), and the characteristics are as follows: A collimating rail (4) is fixed to the top end of the sliding seat (2). The left and right planes of the collimating rail (4) are collimating planes (b), and the two collimating planes (b) are parallel to each other. Above the collimating rail (4), there is a cross frame (5). A pair of symmetrically arranged mounting seats (6) are fixed on the cross frame (5). Bearings (8) are installed on both of the mounting seats (6). The outer rings of the two bearings (8) are respectively pressed against the two collimating planes (b). The left and right planes of the sliding seat (2) are the installation planes (a) of the to-be-machined guide rail, and the installation plane (a) of the to-be-machined guide rail is parallel to the collimating plane (b).

2. The left and right grinding guideway ball track collimation device according to claim 1, characterized in that: Both of the two bearings (8) are needle roller bearings.

3. A left and right grinding guideway ball track collimation device according to claim 1, characterized in that: A driving mechanism (9) for driving the sliding seat (2) to reciprocate along the direction of the guide rail (1-1) is installed on the base (1).

4. A left and right grinding guideway ball track collimation device according to claim 3, characterized in that: The driving mechanism (9) includes a block (9-1) fixed to the top end of the base (1). A pair of front and rear opposite rotating shafts (9-2) are rotatably connected to the block (9-1). Chain gears (9-3) are provided at the left and right ends of the two rotating shafts (9-2). The two chain gears (9-3) on the front rotating shaft (9-2) are both fixed to the front rotating shaft (9-2). The two chain gears (9-3) on the rear rotating shaft (9-2) are both rotatably connected to the rear rotating shaft (9-2). Chains (9-4) are installed between the two chain gears (9-3) on the front and rear opposite sides. A rotary channel (9-1a) for the rotation of the chains (9-4) is formed on the block (9-1). The two chains (9-4) are disconnected. Chain link seats (9-5) are fixed to the left and right sides of the front and rear ends of the sliding seat (2). The disconnection points of the two chains (9-4) are respectively hinged to the respective chain link seats (9-5). Support rods (9-6) for supporting the chains (9-4) are fixed to the top surface of the block (9-1) and the bottom surface of the rotary channel (9-1a). A speed reducer (9-7) and a motor (9-8) are fixed to the block (9-1). The output shaft of the speed reducer (9-7) is coaxially fixed to the front rotating shaft (9-2), and the input shaft of the speed reducer (9-7) is fixed to the rotating shaft of the motor (9-8).

5. A left and right grinding guideway ball track collimation device according to claim 4, characterized in that: On the sides of the two chain gears (9-3) at the rear end, there are support plates (9-9) fixed on the block (9-1). Transverse channel grooves (9-9a) are formed on both of the two support plates (9-9). The rotating shaft (9-2) is fitted at the position of the transverse channel groove (9-9a). Radial insertion holes (9-2a) are formed on the left and right sides of the rotating shaft (9-2) at the rear end. Threaded rods (9-10) are inserted into the two insertion holes (9-2a). Threaded holes (9-1b) are formed on the left and right sides of the rear end of the block (9-1). The two threaded rods (9-10) are respectively threadedly connected to the two threaded holes (9-1b). Stop plates (9-10a) located at the front end of the insertion holes (9-2a) are fixed on the two threaded rods (9-10). Nuts (9-11) located at the front end of the stop plates (9-10a) are threadedly connected to the two threaded rods (9-10).

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