Gap-adjustable grinding device for ball screw pair machining

Abstract

The invention relates to the technical field of thread machining, in particular to a gap-adjustable grinding device for ball screw pair machining, which comprises a numerical control grinding machine, a sliding mechanism is arranged in the numerical control grinding machine, and a grinding carriage mechanism, a pretreatment mechanism, a finishing mechanism, an auxiliary mechanism and a liquid guide hopper are arranged on one side of the sliding mechanism; through the dressing mechanism integrated with the grinding wheel frame mechanism, the grinding wheel can be directly dressed in real time in the grinding process, shutdown operation is not needed, the equipment interruption time is effectively shortened, and the machining efficiency and continuity are remarkably improved; in addition, the arranged trimming mechanism is matched with the pretreatment mechanism, during trimming, an eccentric wheel and a transmission connecting rod are used for driving a filtering frame to vibrate at high frequency, impurities in the cooling liquid are automatically guided into a collecting box, online filtering and collecting of the lubricating cooling liquid are achieved, a filter screen is prevented from being blocked, and the burden of a circulating system of the numerical control grinding machine is relieved.

Description

Technical Field

[0001] This invention relates to the field of thread processing technology, specifically to an adjustable clearance grinding device for processing ball screw pairs. Background Technology

[0002] In the manufacturing process of ball screw assemblies, grinding is a key step in forming high-precision helical raceways. A grinding machine for ball screw assembly is a specialized machine tool whose core function is to grind a raceway profile that meets design requirements onto a heat-treated screw blank through precise relative movement between the grinding wheel and the workpiece. This machine typically includes a bed, a headstock and tailstock workpiece clamping system, a grinding wheel head assembly, and a lead linkage mechanism that enables precise helical movement between the grinding wheel and the workpiece. The grinding wheel head assembly is the core component for performing the grinding operation. To control the grinding depth, ensure machining accuracy, and adapt to different process requirements, modern grinding machines are generally equipped with a clearance adjustment mechanism. This mechanism is mainly used to set and change the relative position between the grinding wheel and the workpiece surface to be machined, i.e., the grinding clearance.

[0003] The inventors have discovered at least the following problems in the prior art: First, during the grinding process, the surface accuracy of the grinding wheel will decrease due to normal wear. At this time, the machining must be interrupted and the wheel moved to an independent station for dressing. After dressing, the tool must be re-set and the clearance must be re-established. This intermittent "machining-stopping-dressing-resetting" pattern severely disrupts the production cycle and leads to low equipment utilization.

[0004] Secondly, a large amount of metal shavings and abrasive particles will be mixed into the coolant and lubricant, and existing filtration solutions have obvious shortcomings: if relying on the machine tool's main filtration system, it will be overburdened, and the unfiltered particles will flow back and scratch the workpiece surface; if a static filter is used, it is very easy to become clogged, resulting in reduced cooling efficiency and requiring frequent shutdowns for cleaning. Both of these situations affect continuous operation and accelerate the wear of components in the circulation system.

[0005] Therefore, this solution provides a grinding device with adjustable clearance for machining ball screw pairs to solve the above problems. Summary of the Invention

[0006] To address the problems of low grinding wheel dressing efficiency, poor coolant filtration, and insufficient auxiliary support adaptability in existing technologies, this invention provides an adjustable clearance grinding device for machining ball screw pairs, thereby solving the aforementioned problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An adjustable clearance grinding device for machining ball screw assemblies includes a CNC grinding machine. The CNC grinding machine has a sliding mechanism inside, and one side of the sliding mechanism is equipped with a grinding wheel head mechanism, a pretreatment mechanism, a dressing mechanism, an auxiliary mechanism, and a liquid guide hopper. The sliding mechanism includes a load-bearing sliding frame that slides left and right inside the CNC grinding machine. A push plate is fixedly connected to one side of the load-bearing sliding frame, and a drive motor is mounted above the push plate. The grinding wheel head mechanism includes a turntable and a grinding wheel head mounted on one side of the turntable. A drive assembly is mounted on one side of the grinding wheel head. A grinding wheel is installed on the inner side of the wheel frame; the pretreatment mechanism includes a filter box fixedly connected to the bottom of the turntable, a filter frame slidably connected inside the filter box, and collection boxes on both sides of the filter box; the dressing mechanism includes a slider and a dressing disc rotatably connected to one side of the slider, and a stroke cylinder is installed on the other side of the slider; the auxiliary mechanism includes a receiving block mounted on one side of the bearing sliding frame and auxiliary brackets on both sides of the receiving block, with cleaning brushes and support plates distributed above one end of the auxiliary brackets; the liquid guide hopper is located on one side of the bottom of the grinding wheel frame.

[0008] Preferably, the grinding wheel holder is internally rotatably connected to a pulley and a third pulley, and the outer periphery of the pulley and the third pulley is connected to a toothed belt. The output end of the drive group is connected to the grinding wheel through a drive shaft, and a first pulley is installed on the outer periphery of the drive shaft. The first pulley is located inside the toothed belt.

[0009] Preferably, the grinding wheel frame has a groove inside, the slider is slidably connected inside the groove, one side of the pulley three is connected to an eccentric wheel via a shaft, and one side of the eccentric wheel is rotatably connected to a transmission link.

[0010] Preferably, a connecting frame is fixedly connected to one side of the slider, the connecting frame is installed at the output end of the stroke cylinder, a roller is rotatably connected to the inner side of the connecting frame, the roller cooperates with the inner side of the toothed belt, the stroke cylinder is installed on one side of the grinding wheel frame, and a servo motor is installed on one side of the slider.

[0011] Preferably, the filter frame is inverted V-shaped, with two symmetrical filter screens installed on the inner side of the filter frame, and a connecting rod fixedly connected to the outer side of the filter frame, the upper end of the connecting rod being rotatably connected to the lower end of the transmission connecting rod.

[0012] Preferably, the filter box has a connection interface on both sides, and a pair of hooks are fixedly connected to both sides of the filter box. The hooks hold the collection box, the connection interface is connected to the collection box, and a second filter screen is inserted into the inside of the collection box.

[0013] Preferably, guide posts are fixedly connected to the four top corners below the tray, and springs slide into the periphery of each guide post. The guide posts are inserted into one end of the auxiliary bracket.

[0014] Preferably, the other end of the auxiliary bracket is fixedly connected to two symmetrically arranged insert rods, which are inserted into the inside of the receiving block. A tension spring is hung between the two insert rods, and the tension spring is located inside the receiving block.

[0015] Preferably, a side cover plate is hinged to one side of the grinding wheel frame, and a grinding wheel groove is opened inside the grinding wheel frame. The grinding wheel and the dressing disc are both located in the grinding wheel groove. The grinding wheel frame is fixedly connected to one side of the liquid guide hopper, and the inner side of the liquid guide hopper is connected to the grinding wheel groove.

[0016] Preferably, the CNC grinding machine further includes a clamping plate and a lead screw assembly, with the lead screw assembly positioned above the cleaning brush and its two ends clamped by the clamping plate. Compared with the prior art, the beneficial effects of this invention are: This invention, through a dressing mechanism integrated with the grinding wheel frame, enables real-time dressing of the grinding wheel directly during the grinding process without requiring machine downtime, effectively reducing equipment interruption time and significantly improving processing efficiency and continuity.

[0017] This invention, through the cooperation of a dressing mechanism and a pretreatment mechanism, utilizes an eccentric wheel and a transmission linkage to drive the filter frame to vibrate at high frequency during dressing, automatically guiding impurities in the coolant into the collection box. This achieves online filtration and collection of the lubricating coolant, prevents filter screen clogging, and reduces the burden on the circulation system of the CNC grinding machine.

[0018] This invention, by setting an adaptive auxiliary mechanism, can automatically adjust the spacing of the auxiliary bracket when the grinding wheel head is tilted, so that the cleaning brush and the support plate are always in contact with the lead screw pair, which not only provides stable support, but also removes grinding debris in time. At the same time, the spring and tension spring structure absorbs vibration, improving grinding accuracy and surface quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the middle section; Figure 3 This is a schematic diagram of the external structure of the grinding wheel frame mechanism of the present invention; Figure 4 This is a schematic diagram of the internal structure of the grinding wheel frame mechanism of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the middle section; Figure 6 This is a schematic diagram of the disassembled structure of the pretreatment mechanism of the present invention; Figure 7 This is a schematic diagram of the trimming mechanism of the present invention; Figure 8 This is a schematic diagram of the disassembled structure of the auxiliary mechanism of the present invention.

[0020] In the picture: 1. CNC grinding machine; 2. Sliding mechanism; 21. Bearing sliding frame; 22. Push plate; 23. Drive motor; 3. Clamping plate; 4. Lead screw pair; 5. Grinding wheel frame mechanism; 51. Turntable; 52. Grinding wheel frame; 521. Grinding wheel groove; 522. Side cover plate; 53. Drive assembly; 54. Drive shaft; 55. Slide groove; 56. Grinding wheel; 57. Belt pulley one; 58. Belt pulley; 59. Belt pulley three; 591. Toothed belt; 592. Eccentric wheel; 593. Transmission connecting rod; 6. Pretreatment mechanism; 61. Filter box; 611. Connecting interface; 62. Filter frame; 63. Filter screen one; 64. Connecting rod; 65. Collection box; 66. Filter screen two; 67. Hook; 7. Dressing mechanism; 71. Slider; 72. Servo motor; 73. Dressing disc; 74. Connecting frame; 75. Roller; 76. Stroke cylinder; 8. Auxiliary mechanism; 81. Receiving block; 82. Auxiliary bracket; 83. Insert rod; 84. Tension spring; 85. Support plate; 86. Cleaning brush; 87. Guide post; 88. Spring; 9. Liquid guiding funnel. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Example: Please refer to Figure 1-8 The invention relates to a grinding device for machining ball screw pairs with adjustable clearance, comprising a CNC grinding machine 1, a sliding mechanism 2 inside the CNC grinding machine 1, and a grinding wheel frame mechanism 5, a pretreatment mechanism 6, a dressing mechanism 7, an auxiliary mechanism 8 and a liquid guide hopper 9 on one side of the sliding mechanism 2. The sliding mechanism 2 includes a support sliding frame 21 that slides left and right inside the CNC grinding machine 1. A push plate 22 is fixedly connected to one side of the support sliding frame 21, and a drive motor 23 is installed above the push plate 22. The grinding wheel frame mechanism 5 includes a turntable 51 and a grinding wheel frame 52 installed on one side of the turntable 51. A drive assembly 53 is installed on one side of the grinding wheel frame 52, and a grinding wheel 56 is provided on the inner side of the grinding wheel frame 52. The pretreatment mechanism 6 includes a filter box 61 fixedly connected to the bottom of the turntable 51, a filter frame 62 slidably connected inside the filter box 61, and collection boxes 65 provided on both sides of the filter box 61. The trimming mechanism 7 includes a slider 71 and a trimming disc 73 rotatably connected to one side of the slider 71, and a stroke cylinder 76 is provided on the other side of the slider 71. The auxiliary mechanism 8 includes a receiving block 81 mounted on one side of the bearing sliding frame 21 and auxiliary brackets 82 on both sides of the receiving block 81. A cleaning brush 86 and a tray 85 distributed above one end of the auxiliary bracket 82 are provided. The liquid guide hopper 9 is located on one side of the bottom of the grinding wheel frame 52; Among them, the CNC grinding machine 1 is a CNC grinding machine with an external PLC controller that can control the operation of other electrical control equipment. In addition, the CNC grinding machine 1 has internal slide rails to control the sliding of the bearing slide frame 21. The push plate 22 has a worm gear assembly inside, which can drive the turntable 51 to move closer to or away from the lead screw pair 4. The drive motor 23 is used to drive the worm gear assembly. A rotary motor is provided on one side of the turntable 51. The rotary motor is installed above the push plate 22 and can drive the turntable 51 and the grinding wheel frame 52 to rotate, thereby adjusting the tilt angle between the grinding wheel 56 and the lead screw pair 4. This is existing technology and will not be described in detail.

[0023] In this embodiment, a pulley 58 and a third pulley 59 are rotatably connected inside the grinding wheel holder 52. A toothed belt 591 is connected to the outer periphery of the pulley 58 and the third pulley 59. The output end of the drive group 53 is connected to the grinding wheel 56 through the drive shaft 54. A first pulley 57 is installed on the outer periphery of the drive shaft 54. The first pulley 57 is located inside the toothed belt 591. The grinding wheel holder 52 has a transmission cavity inside, which facilitates the transmission of pulley 57, pulley 58, pulley 59 and toothed belt 591. The transmission cavity is connected to the slide groove 55, so that the toothed belt 591 can cooperate with the roller 75. When the drive group 53 is operating, the grinding wheel 56 can be rotated at high speed through the drive shaft 54. With the sliding mechanism 2, the grinding wheel 56 can grind the lead screw pair 4.

[0024] In this embodiment, a groove 55 is provided inside the grinding wheel holder 52, and the slider 71 is slidably connected inside the groove 55. One side of the pulley 59 is connected to an eccentric wheel 592 via a shaft, and a transmission link 593 is rotatably connected to one side of the eccentric wheel 592. Among them, the dressing disc 73 can cooperate with the grinding wheel 56. The grinding wheel 56 is a grinding wheel, while the dressing disc 73 is a stainless steel dressing wheel embedded with diamond, which is used to dress the grinding wheel 56. In addition, after each stroke of the cylinder 76 is driven, the stroke of the drive motor 23 is increased by a fixed distance, so as to ensure that the grinding wheel 56 can still contact the thread of the lead screw pair 4 for grinding after being dressed. This is to compensate for the dressing thickness. This can be achieved by the sensor and the controller of the CNC grinding machine 1, which will not be elaborated here.

[0025] In this embodiment, a connecting frame 74 is fixedly connected to one side of the slider 71. The connecting frame 74 is installed at the output end of the stroke cylinder 76. A roller 75 is rotatably connected to the inner side of the connecting frame 74. The roller 75 cooperates with the inner side of the toothed belt 591. The stroke cylinder 76 is installed on one side of the grinding wheel frame 52. A servo motor 72 is installed on one side of the slider 71. The slider 71 has a speed reducer inside, which allows the servo motor 72 to drive it. The upper and lower sides of the slider 71 have dovetail blocks that can slide and connect to the inside of the slide groove 55. When the stroke cylinder 76 operates, it causes the slider 71 to move through the connecting frame 74, and also causes the roller 75 to contact the toothed belt 591, thereby tightening the toothed belt 591. Only then will the pulley 59 and the eccentric wheel 592 rotate to perform transmission.

[0026] In this embodiment, the filter frame 62 is inverted V-shaped, and two symmetrical filter screens 63 are installed on the inner side of the filter frame 62. A connecting rod 64 is fixedly connected to the outer side of the filter frame 62, and the upper end of the connecting rod 64 is rotatably connected to the lower end of the transmission connecting rod 593. The two filter screens 63 are symmetrical about the left and right and tilted towards the interface 611. Under normal circumstances, the lubricating fluid can pass through the filter screens 63 and retain impurities above the filter screens 63. When the eccentric wheel 592 and the pulley 59 rotate, the filter frame 62 and the filter screens 63 will vibrate up and down at high speed through the transmission link 593 and the connecting link 64, thereby guiding the impurities into the collection box 65 for collection.

[0027] In this embodiment, the filter box 61 has a connection interface 611 on both sides, and a pair of hooks 67 are fixedly connected to both sides of the filter box 61. The hooks 67 hold the receiving box 65, the connection interface 611 is connected to the receiving box 65, and a filter screen 66 is inserted into the inside of the receiving box 65. When the filter frame 62 vibrates up and down, the lubricating fluid in the front and rear parts will splash into the collection box 65, so that the filter screen 66 can filter.

[0028] In this embodiment, guide posts 87 are fixedly connected to the four top corners below the tray 85, and springs 88 are slid into the periphery of each guide post 87. The guide posts 87 are inserted into one end of the auxiliary bracket 82. Among them, the cleaning brush 86 above the support plate 85 is a bristle brush, which cleans the lead screw assembly 4 when the lead screw assembly 4 rotates and the auxiliary mechanism 8 moves together with the sliding mechanism 2; when the cleaning brush 86 contacts the lead screw assembly 4, the spring 88 can absorb the vibration during the grinding process.

[0029] In this embodiment, the other end of the auxiliary bracket 82 is fixedly connected to two symmetrically arranged insert rods 83, which are inserted into the inside of the receiving block 81. A tension spring 84 is hung between the two insert rods 83, and the tension spring 84 is located inside the receiving block 81. Among them, the auxiliary bracket 82 itself is a triangular frame, so it will be pushed when the grinding wheel frame 52 rotates. After being pushed, the distance between the two auxiliary brackets 82 is increased, so that the lead screw assembly 4 can still be supported and cleaned.

[0030] In this embodiment, a side cover plate 522 is hinged to one side of the grinding wheel frame 52, and a grinding wheel groove 521 is provided inside the grinding wheel frame 52. The grinding wheel 56 and the dressing disc 73 are both located in the grinding wheel groove 521. The side of the liquid guide hopper 9 is fixedly connected to the grinding wheel frame 52, and the inner side of the liquid guide hopper 9 is connected to the grinding wheel groove 521. The side cover plate 522 is used to facilitate the replacement of the grinding wheel 56 and dressing disc 73 in the grinding wheel groove 521; one end of the liquid guide hopper 9 is inclined upward and located below the grinding wheel 56, and both the liquid guide hopper 9 and the inner side of the grinding wheel groove 521 have arcs, so that when the grinding wheel frame mechanism 5 is tilted, the coolant will still be guided into the grinding wheel groove 521 by the liquid guide hopper 9 and then discharged downward from the pretreatment mechanism 6.

[0031] In this embodiment, the CNC grinding machine 1 is also provided with a clamping plate 3 and a lead screw pair 4. The lead screw pair 4 is located above the cleaning brush 86, and both ends of the lead screw pair 4 are clamped by the clamping plate 3. Among them, the drive motor 23 and the drive group 53 are both composed of a reducer and a motor; the clamping plate 3 is used to position the lead screw pair 4; the lead screw pair 4 is a ball screw pair to be processed, and its surface has threads.

[0032] The working principle of this invention is as follows: When grinding the lead screw assembly 4, the drive motor 23 will operate to bring the grinding wheel frame mechanism 5 close to the lead screw assembly 4. At this time, the grinding wheel 56 can grind the threads on the lead screw assembly 4. During this process, the external control device of the CNC grinding machine 1 will simultaneously drive the clamping plate 3 to rotate and drive the drive group 53 to rotate so as to drive the grinding wheel 56 to rotate. At the same time, it can also control the motor mounted on the push plate 22 on the back of the turntable 51 to rotate the turntable 51, thereby controlling the tilt angle of the grinding wheel 56 so as to grind the threads of the lead screw assembly 4 more finely. During the grinding process, there will be lubricating coolant at the grinding wheel 56 to continuously cool and lubricate the grinding area. The liquid passing through the grinding wheel 56 and the outside of the lead screw assembly 4 will be caught by the liquid guide 9 and guided into the grinding wheel groove 521. After passing through the interior of the pretreatment mechanism 6, it will be discharged to the circulation point at the bottom of the CNC grinding machine 1, so as to perform pre-filtration and reduce the burden on the circulation system of the CNC grinding machine 1. When the edge of the grinding wheel 56 wears due to friction, the stroke cylinder 76 and servo motor 72 can be driven by an external control device. The operation of the stroke cylinder 76 will push the slider 71 to move, and the operation of the servo motor 72 will cause the dressing disc 73 to rotate. When the dressing disc 73 contacts the grinding wheel 56, the grinding wheel 56 can be dressed. Thus, dressing and grinding are integrated into one, so that the grinding wheel 56 can be dressed in real time without stopping the machine after it wears. In addition, during the process of the stroke cylinder 76 pushing the connecting frame 74 and the slider 71 to move, the roller 75 will also move, so that the roller 75 contacts the inner side of the toothed belt 591, making the toothed belt 591 taut. At this time, the inner side of the toothed belt 591 will cooperate with the pulley 1 57, pulley 58, pulley 3 59 and roller 75 at the same time. Since the drive group 53 drives the grinding wheel 56 to rotate, it will also drive the pulley 1 57 to rotate. Then, the pulley 3 59 can be rotated through the transmission of pulley 1 57, pulley 58 and toothed belt 591. Thus, through the eccentric wheel 592 on one side of pulley 3 59 and the transmission link 593, the filter frame 62 can move up and down inside the filter box 61. This can accelerate the lubrication and cooling process after the pre-filtering treatment of filter screen 1 63, and guide the material left on the filter screen 1 63 into the collection box 65 for collection, so as to avoid the filter screen 1 63 from clogging. Furthermore, during the grinding process of the lead screw assembly 4, the support plate 85 and cleaning brush 86 at the upper end of the auxiliary bracket 82 can provide auxiliary support for both sides of the grinding area. During the support process, the vibration during the grinding process will be absorbed by the spring 88 at the bottom of the support plate 85, and at the same time, the cleaning brush 86 can wipe away the debris remaining in the lead screw assembly 4 and its threads during the grinding process. When the turntable 51 tilts with the grinding wheel frame 52, one side of the bottom of the grinding wheel frame 52 will push one of the auxiliary brackets 82, so that the insert rod 83 at the other end of the auxiliary bracket 82 will pull the tension spring 84, thereby allowing the support and wiping area of ​​the support plate 85 and the cleaning brush 86 to adaptively expand according to the tilt angle of the grinding.

[0033] The CNC grinding machine 1, sliding mechanism 2, clamping plate 3, lead screw pair 4, drive group 53 and servo motor 72 used in this invention are all existing known electrical devices, and all can be directly purchased and used on the market. Their structure, circuit and control principle are all existing known technologies. Therefore, the structure, circuit and control principle of the CNC grinding machine 1, sliding mechanism 2, clamping plate 3, lead screw pair 4, drive group 53 and servo motor 72 will not be described in detail here.

[0034] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A backlash-adjustable grinding device for machining ball screw pairs, comprising a CNC grinding machine (1), characterized in that: The CNC grinding machine (1) is equipped with a sliding mechanism (2) inside. On one side of the sliding mechanism (2) are a grinding wheel frame mechanism (5), a pretreatment mechanism (6), a dressing mechanism (7), an auxiliary mechanism (8) and a liquid guide hopper (9). The sliding mechanism (2) includes a bearing sliding frame (21) that slides left and right inside the CNC grinding machine (1). A push plate (22) is fixedly connected to one side of the bearing sliding frame (21), and a drive motor (23) is installed above the push plate (22). The grinding wheel frame mechanism (5) includes a turntable (51) and a grinding wheel frame (52) installed on one side of the turntable (51). A drive assembly (53) is installed on one side of the grinding wheel frame (52), and a grinding wheel (56) is provided on the inner side of the grinding wheel frame (52). The pretreatment mechanism (6) includes a filter box (61) fixedly connected to the bottom of the turntable (51), a filter frame (62) is slidably connected inside the filter box (61), and collection boxes (65) are provided on both sides of the filter box (61). The trimming mechanism (7) includes a slider (71) and a trimming disc (73) rotatably connected to one side of the slider (71), and a stroke cylinder (76) is provided on the other side of the slider (71). The auxiliary mechanism (8) includes a receiving block (81) mounted on one side of the bearing sliding frame (21) and auxiliary brackets (82) on both sides of the receiving block (81). A cleaning brush (86) and a tray (85) distributed above one end of the auxiliary bracket (82) are provided. The liquid guide hopper (9) is located on one side of the bottom of the grinding wheel frame (52).

2. The adjustable clearance grinding device for machining ball screw pairs according to claim 1, characterized in that: The grinding wheel holder (52) is internally rotatably connected to a pulley (58) and a third pulley (59). A toothed belt (591) is connected to the outer periphery of the pulley (58) and the third pulley (59). The output end of the drive group (53) is connected to the grinding wheel (56) through a drive shaft (54). A first pulley (57) is installed on the outer periphery of the drive shaft (54). The first pulley (57) is located inside the toothed belt (591).

3. The adjustable clearance grinding device for machining ball screw pairs according to claim 2, characterized in that: The grinding wheel frame (52) has a groove (55) inside, and the slider (71) is slidably connected inside the groove (55). One side of the pulley (59) is connected to an eccentric wheel (592) via a shaft, and one side of the eccentric wheel (592) is rotatably connected to a transmission link (593).

4. The adjustable clearance grinding device for machining ball screw pairs according to claim 1, characterized in that: A connecting frame (74) is fixedly connected to one side of the slider (71). The connecting frame (74) is installed at the output end of the stroke cylinder (76). A roller (75) is rotatably connected to the inner side of the connecting frame (74). The roller (75) cooperates with the inner side of the toothed belt (591). The stroke cylinder (76) is installed on one side of the grinding wheel frame (52). A servo motor (72) is installed on one side of the slider (71).

5. The adjustable clearance grinding device for machining ball screw pairs according to claim 1, characterized in that: The filter frame (62) is inverted V shape. Two symmetrical filter screens (63) are installed on the inner side of the filter frame (62). A connecting rod (64) is fixedly connected to the outer side of the filter frame (62). The upper end of the connecting rod (64) is rotatably connected to the lower end of the transmission connecting rod (593).

6. The adjustable clearance grinding device for machining ball screw pairs according to claim 1, characterized in that: The filter box (61) has a connection interface (611) on both sides. A pair of hooks (67) are fixedly connected to both sides of the filter box (61). The hooks (67) hold the receiving box (65). The connection interface (611) is connected to the receiving box (65). A filter screen (66) is inserted inside the receiving box (65).

7. The adjustable clearance grinding device for machining ball screw pairs according to claim 1, characterized in that: Guide posts (87) are fixedly connected to the four corners below the tray (85). Springs (88) slide into the periphery of each guide post (87). The guide post (87) is inserted into one end of the auxiliary bracket (82).

8. The adjustable clearance grinding device for machining ball screw pairs according to claim 1, characterized in that: The other end of the auxiliary bracket (82) is fixedly connected to two symmetrical insert rods (83), which are inserted into the inside of the receiving block (81). A tension spring (84) is hung between the two insert rods (83), which is located inside the receiving block (81).

9. The adjustable clearance grinding device for machining ball screw pairs according to claim 1, characterized in that: A side cover plate (522) is hinged to one side of the grinding wheel frame (52). A grinding wheel groove (521) is provided inside the grinding wheel frame (52). The grinding wheel (56) and the dressing disc (73) are both located in the grinding wheel groove (521). The side of the liquid guide hopper (9) is fixedly connected to the grinding wheel frame (52). The inner side of the liquid guide hopper (9) is connected to the grinding wheel groove (521).

10. The adjustable clearance grinding device for machining ball screw pairs according to claim 1, characterized in that: The CNC grinding machine (1) is also equipped with a clamping plate (3) and a lead screw pair (4). The lead screw pair (4) is located above the cleaning brush (86), and both ends of the lead screw pair (4) are clamped by the clamping plate (3).

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