Switching device of tool run-out measuring instrument

Abstract

The invention discloses a switching device of a tool run-out measuring instrument, and the measuring instrument comprises a fixed frame and a measuring device. The switching device comprises a fine adjustment hand wheel, a lead screw, a sliding assembly and a plug pin. The measuring device comprises a connecting block and a handle. The fine adjustment hand wheel is connected with the lead screw in a matched mode, the lead screw is rotatably supported on the fixing frame, the connecting block is slidably arranged on the lead screw in a sleeving mode, the plug pin is slidably contained in the connecting block and connected with the lead screw in a pluggable and matched mode, the sliding assembly comprises a balancing weight, and the balancing weight is fixedly connected with the connecting block through a connecting line and drives the connecting block to move through the gravity of the balancing weight. The handle is held, the bolt is separated from the lead screw, and the balancing weight drives the measuring device to quickly move up and down along the lead screw to realize quick adjustment; and the fine adjustment hand wheel is rotated, so that the measuring device moves up and down along the lead screw to realize fine adjustment. The device can be switched between a quick moving state and a fine-tuning moving state, so that the measurement precision is ensured, the time can be saved, and the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools, and in particular to a switching device of a tool runout measuring instrument. Background Art

[0002] In machining, the radial runout of rotating tools has a great impact on the tool life and workpiece machining accuracy. Especially in high-speed machining, in order to extend the tool life and machining accuracy requirements, it is necessary to detect the tool runout data.

[0003] In the prior art, there are three main ways to drive the measuring device to move. One is to install the measuring device on a guide rail assembly, set a limit device to lock the position, and manually adjust the height of the measuring device. Although this method can make the measuring device move quickly, the measurement accuracy is low. Another method is to install the measuring device on a screw connected to a hand wheel, and drive the measuring device to move by shaking the hand wheel. Although this method can ensure measurement accuracy, it moves slowly and takes a long time. Another method is to use automated equipment to fix the measuring device on a mobile module and drive the mobile module to move by a motor. However, the tool runout measuring instrument used in this method, although it ensures measurement accuracy, is generally sold at a relatively high price, and the cost of use is too high for small-scale factories. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a switching device for a tool runout measuring instrument, which can ensure measurement accuracy and save time.

[0005] The present invention is achieved through the following technical solutions:

[0006] A switching device for a tool runout measuring instrument, wherein the tool runout measuring instrument comprises a fixed frame and a measuring device for measuring tool runout parameters, the switching device comprises a fine-tuning hand wheel, a lead screw, a sliding assembly and a latch, the measuring device comprises a connecting block and a handle fixedly connected to the connecting block, the fine-tuning hand wheel is matched with the lead screw, the lead screw is rotatably supported on the fixed frame, the connecting block is slidably sleeved on the lead screw, the latch is slidably accommodated in the connecting block and is pluggable and threadedly matched with the lead screw, the sliding assembly is supported on the fixed frame and comprises a counterweight block, the counterweight block is fixedly connected to the connecting block through a connecting line and drives the connecting block to move by its own gravity;

[0007] When quick adjustment is required, hold the handle and pull the pin out of the connecting block so that the pin is disengaged from the lead screw, and the counterweight drives the measuring device to move up and down quickly along the lead screw; when fine adjustment is required, insert the pin into the connecting block and connect it to the lead screw, and turn the fine-tuning handwheel to move the measuring device up and down along the lead screw to achieve fine adjustment.

[0008] Furthermore, the switching device also includes a bearing, one end of the lead screw is supported on a fixed frame through the bearing, the fine-tuning hand wheel is located above the bearing and the fixed sleeve is arranged on the lead screw.

[0009] Furthermore, the switching device also includes a connecting sleeve, the connecting block is provided with a fifth through hole, the connecting sleeve is fixedly received in the fifth through hole and is slidably sleeved on the lead screw.

[0010] Furthermore, the connecting block is also provided with a fourth groove, in which the latch can be slidably received, the inner wall of the fourth groove is provided with a third through hole, the connecting sleeve is provided with a second through hole, and the locking tongue of the latch passes through the third through hole and the second through hole at the same time and can be plugged in and out to be matched with the threaded groove of the screw.

[0011] Furthermore, the measuring device also includes a connecting ring, which is fixedly engaged with the fourth groove and sleeved on the pin. A first elastic member is sleeved on the outer periphery of the pin. The first elastic member is accommodated in the fourth groove and one end is engaged with the first boss of the pin and the other end is engaged with the connecting ring.

[0012] Furthermore, the sliding assembly also includes a pair of pulleys, the connecting line can slide around the pulleys and one end is fixedly connected to the counterweight block, and the other end passes through the pulley and is fixedly connected to the connecting block. The counterweight block drives one end of the connecting line to move downward under the action of its own gravity, and the other end of the connecting line slides upward around the pulley, thereby driving the connecting block to move upward.

[0013] Furthermore, the sliding assembly also includes a first sliding rail and a first sliding block. The first sliding rail is arranged on one side of the fixing frame. The first sliding block is slidably connected to the first sliding rail. The first sliding block is fixedly connected to the connecting block.

[0014] Furthermore, the sliding assembly also includes a second slide rail and a second slider. The second slide rail is installed on the other side of the fixed frame. The second slider is slidably connected to the second slide rail. The counterweight is fixed on the second slider.

[0015] Furthermore, a pair of pulleys are fixedly supported on the fixing frame and are respectively located above the first slide rail and the second slide rail.

[0016] Furthermore, the tool runout measuring instrument also includes a pair of tool fixing devices installed on both sides of the base, the measuring device includes a pair of scale components installed on the connecting block, and the pair of tool fixing devices and the pair of scale components are symmetrically arranged on both sides of the switching device.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The lead screw, the pluggable pin and the fine-tuning handwheel are arranged through the switching device, so that the measuring device can be switched between the two working states of quick adjustment and fine-tuning adjustment, with a simple structure and convenient and fast operation.

[0019] 2. By using the connecting wire to fix the counterweight and the measuring device on both sides of the pulley, the counterweight drives one end of the connecting wire to move downward under its own gravity, and the other end of the connecting wire slides upward around the pulley to drive the measuring device to move upward, so that the measuring device can be fixed on the upper end of the switching device without manual intervention, saving manpower.

[0020] 3. A first elastic member is provided on the latch pin for resetting and ensuring that the latch pin is tightly pressed against the thread groove.

[0021] 4. By setting a pair of tool fixing devices and a pair of gauge components on one device, the need for pre-measurement of tool runout of two tool components on the same device can be achieved at the lowest cost, reducing costs and improving equipment utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A front view of a tool runout measuring instrument according to an embodiment of the present invention;

[0023] Figure 2 It is a right side view of the vertical moving device and the measuring device;

[0024] Figure 3 for Figure 1 Sectional view along AA;

[0025] Figure 4 for Figure 3 Enlarged view of middle B;

[0026] Figure 5 It is a three-dimensional assembly drawing of the measuring device;

[0027] Figure 6 is a top view of the tool fixing device;

[0028] Figure 7 This is an exploded view of the tool fixture;

[0029] Figure 8 for Figure 6 Cross-sectional view along CC;

[0030] Fig. 9 The exploded view of the jacking assembly;

[0031] Fig.10 for Figure 7 Enlarged view of middle D;

[0032] Fig.11 A motion state diagram of a tool runout measuring instrument according to an embodiment of the present invention;

[0033] Fig.12 Another motion state diagram of a tool runout measuring instrument according to an embodiment of the present invention;

[0034] Fig.13 The relaxation state diagram of the top tightening component

[0035] Fig.14 This is a diagram of the tightening status of the tightening component.

[0036] Description of reference numerals: 1, switching device; 11, sliding assembly; 112, first slide rail; 113, second slide rail; 114, first slider; 115, second slider; 116, pulley; 117, connecting wire; 118, counterweight; 120, fine-tuning hand wheel; 121, bearing; 122, lead screw; 124, connecting sleeve; 125, second through hole; 126, threaded groove; 131, latch; 132, lock tongue; 1 33, first elastic member; 134, first boss; 14, fixing frame; 140, fixing plate; 141, connecting plate; 142, first through hole; 2, measuring device; 21, meter frame assembly; 210, connecting block; 211, bracket; 212, third through hole; 213, connecting ring; 214, fourth groove; 215, handle; 216, fifth through hole; 217, fifth groove; 22, meter assembly; 220, Fine adjustment slide; 221, fine adjustment knob; 222, fixed seat; 223, dial indicator; 224, needle; 3, tool fixing device; 30, base; 300, first groove; 301, second groove; 31, fixed seat; 32, retaining frame; 33, tightening assembly; 330, housing; 331, tightening piston; 332, tail cover; 333, second elastic member; 334, fourth through hole; 335, head; 33 6. air hole; 337. second boss; 338. third boss; 339. receiving groove; 340. fourth boss; 34. air slide valve; 341. receiving chamber; 342. high-pressure air chamber; 343. tail; 344. annular groove; 345. sealing member; 35. dust cover; 5. base; 7. tool assembly; 71. tool body; 72. handle; 73. tapered handle; 74. rivet; 741. tapered surface; L. axis. DETAILED DESCRIPTION

[0037] The following is a further non-restrictive detailed description of the technical solution of the invention in conjunction with the preferred embodiments and the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limitations on the present invention.

[0038] like Figure 1 As shown, a tool runout measuring instrument according to an embodiment of the present invention comprises a switching device 1, a measuring device 2, a pair of tool fixing devices 3 and a base 5. The switching device 1 is fixedly connected to the measuring device 2 and drives the measuring device 2 to move in a vertical direction, and the vertical motion device 1 is fixedly connected to the base 5. The measuring device 2 comprises a pair of gauge assemblies 22 mounted on a connecting block 210, and the pair of tool fixing devices 3 and the pair of gauge assemblies 22 are symmetrically arranged on both sides of the switching device.

[0039] like Figures 2 to 3As shown, the tool runout measuring instrument includes a fixed frame 14 and a measuring device 2 for measuring tool runout parameters. The switching device 1 includes a fine-tuning handwheel 120, a lead screw 122, a sliding assembly 11 and a latch 131. The measuring device 2 includes a connecting block 210 and a handle 215 fixedly connected to the connecting block 210. The fine-tuning handwheel 120 is matched with the lead screw 122, and the lead screw 122 is rotatably supported on the fixed frame 14. The connecting block 210 is slidably mounted on the lead screw 122. The latch 131 is slidably received in the connecting block 210 and is pluggable and threadedly matched with the lead screw 122. The sliding assembly 11 is supported on the fixed frame 14 and includes a counterweight block 118, which is fixedly connected to the connecting block 210 through a connecting line 117 and drives the connecting block 210 to move by its own gravity. When quick adjustment is required, hold the handle 215 and pull out the pin 131 toward the outside of the connection block 210, so that the pin 131 is separated from the lead screw 122, and the counterweight 118 drives the measuring device 2 to move up and down quickly along the lead screw 122; when fine adjustment is required, insert the pin 131 into the connection block 210 and match it with the lead screw 122, and turn the fine adjustment hand wheel 120 to move the measuring device 2 up and down along the lead screw 122 to achieve fine adjustment. The lead screw 122, the pluggable pin 131 and the fine adjustment hand wheel 120 are arranged by the switching device 1, so that the measuring device 2 can switch between the two working states of quick adjustment and fine adjustment, and the structure is simple, convenient and fast.

[0040] The switching device also includes a bearing 121. One end of the lead screw 122 is supported on the fixed frame 14 through the bearing 121, and the fine-tuning handwheel 120 is located above the bearing 121 and is fixedly sleeved on the lead screw 122. Specifically, the fixed frame 14 includes a fixed plate 140 and a connecting plate 141, and the fixed plate 140 and the connecting plate 141 are fixedly connected by screws. A first through hole 119 is provided at the front end of the fixed plate 140, and the bearing 121 is installed in the first through hole 119. The upper end portion of the lead screw 122 is accommodated in the bearing 121 and cooperates with the bearing 121. The top end of the lead screw 122 is fixedly connected to the fine-tuning handwheel 120.

[0041] The switching device also includes a connecting sleeve 124. The connecting block 210 is provided with a fifth through hole 216, and the connecting sleeve 124 is fixedly received in the fifth through hole 216 and slidably sleeved on the lead screw 122. The connecting block 210 is also provided with a fourth groove 214, and the latch 131 is slidably received in the fourth groove 214. The inner wall of the fourth groove 214 is provided with a third through hole 212, and the connecting sleeve 124 is provided with a second through hole 125. The locking tongue 132 of the latch 131 passes through the third through hole 212 and the second through hole 125 at the same time and can be plugged and unplugged to be matched with the thread groove 126 of the lead screw 122.

[0042] The measuring device 2 also includes a connecting ring 213, which is fixedly engaged with the fourth groove 214 and sleeved on the latch 131. The outer periphery of the latch 131 is sleeved with a first elastic member 133, which is received in the fourth groove 214 and is engaged with the first boss 134 of the latch 131 at one end and engaged with the connecting ring 213 at the other end. Specifically, when the switching device is in the fine-tuning state, the latch 131 maintains the locking tongue 132 in the thread groove 126 under the elastic force of the first elastic member 133; when the latch 131 is pulled to overcome the elastic force of the first elastic member 133 and moves, the locking tongue 132 is disengaged from the thread groove 126, and at this time, the switching device changes from the fine-tuning state to the fast-adjusting state. Among them, the first elastic member 133 is a reset spring.

[0043] The sliding assembly 11 further includes a first slide rail 112 and a first slider 114. The first slide rail 112 is disposed on one side of the fixed frame 14. The first slider 114 is slidably connected to the first slide rail 112. The first slider 114 is fixedly connected to the connecting block 210. The sliding assembly 11 further includes a pair of pulleys 116. A connecting line 117 can slide around the pulley 116 and one end is fixedly connected to the counterweight 118, and the other end passes through the pulley 116 and is fixedly connected to the connecting block 210. The counterweight 118 drives one end of the connecting line 117 to move downward under its own gravity, and the other end of the connecting line 117 slides upward around the pulley 116 to drive the connecting block 210 to move upward. The pair of pulleys 116 are fixedly supported on the fixed frame 14 and are respectively located above the first slide rail 112 and the second slide rail 113. The sliding assembly 11 further includes a second slide rail 113 and a second slider 115. The second slide rail 113 is mounted on the other side of the fixed frame 14. The second slider 115 is slidably connected to the second slide rail 113. The counterweight 118 is fixed to the second slider 115. The first slide rail 112 is fixedly connected to the side of the connecting plate 141 close to the fine-tuning assembly 12 by screws; the second slide rail 113 is fixedly connected to the side of the connecting plate 141 away from the fine-tuning assembly 12 by screws, and the first slide rail 112 and the second slide rail 113 are symmetrical about the connecting plate 141. Specifically, a pair of pulleys 116 are fixedly connected to the bottom of the fixed plate 130 by steel wire ropes. In this embodiment, the pulley 116 is preferably a fixed pulley. In this embodiment, the connecting wire 117 is preferably a rubber-coated steel wire. One end of the connecting wire 117 is placed on the front side of the connecting plate 131 and is fixedly connected to the measuring device 2, and the other end passes through the pulley 116 and is placed on the rear side of the connecting plate 131 and is fixedly connected to the top of the counterweight 118. The side wall of the counterweight 118 is fixedly connected to the second slider 115 by screws. The weight of the counterweight 118 should be greater than or equal to the weight of the measuring device 2. The counterweight 118 and the measuring device 2 are fixed on both sides of the pulley 116 by using the connecting wire 117. The counterweight 118 drives one end of the connecting wire 117 to move downward under the action of its own gravity, and the other end of the connecting wire 117 slides upward around the pulley 116 to drive the measuring device 2 to move upward, so that the measuring device 2 can be fixed on the upper end of the switching device 1 without manual intervention, saving manpower.

[0044] like Figure 4 and Figure 5As shown, the measuring device 2 includes a table frame assembly 21 and a pair of gauge assemblies 22. The table frame assembly 21 includes a bracket 211. The rear side of the connecting block 210 is fixedly connected to the first slider 114 by screws. The bracket 211 is fixedly connected to the connecting block 210 by screws. A handle 215 is fixedly connected to the middle part of the bracket 211 by screws. During the movement, the speed of movement can be manually controlled by holding the handle 215 to prevent damage to the equipment or tool assembly 7 due to excessive speed. A pair of gauge assemblies 22 are respectively arranged at both ends of the bracket 211. The gauge assembly 22 includes a fine-tuning slide 220, a fine-tuning knob 221 matched with the fine-tuning slide 220, a fixing seat 222 and a dial indicator 223. The bottom surface of the fine-tuning slide 220 is fixedly connected to the bracket 211 by screws, and the upper surface is fixedly connected to the fixing seat 222 by screws. The dial indicator 223 is fixedly connected to the fixing seat 222 by screws. By setting the fine adjustment slide 220, the positions of the dial indicator 223 and the tool body 71 are adjusted before and after the measurement, so that the dial indicator 223 is away from the tool body 70, and the dial indicator 223 is prevented from colliding with the tool body 71 to affect the measurement accuracy.

[0045] like Figures 6 to 10 As shown, a pair of tool fixing devices 3 are respectively arranged on both sides of the switching device 1 and aligned with the table frame assembly 21. One of the tool fixing devices 3 is suitable for placing a BT30 model tool assembly 7, and the other tool fixing device is suitable for placing a BT40 model tool assembly 7. The tool fixing device includes a base 30 and at least two sets of tightening assemblies 33 arranged in the base 30. The base 30 is installed with the tool assembly 7 and at least two second grooves 301 are provided. The tightening assembly 33 is fixedly accommodated in the second groove 301 and includes a shell 330 and a tightening piston 331. The tightening piston 331 is movably arranged in the shell 330 and can tighten the tool assembly 7. An air slide valve 34 for controlling the high-pressure gas to enter the tightening assembly 33 is installed on the base 30. One end of the air slide valve 34 is connected to the high-pressure gas source and the other end is fixedly connected to the tightening assembly 33. When the air slide valve 34 is opened, the high-pressure gas enters the tightening assembly 33 and pushes the tightening piston 331 to slide in the shell 330 to tighten the tool assembly 7. Among them, at least two clamping assemblies 33 are evenly distributed along the circumferential direction of the axis L where the tool body 71 is located. Specifically, in this embodiment, the number of the at least two clamping assemblies 33 is preferably two, the number of the second grooves 301 and the clamping assemblies 33 is equal, and the shell 330 is fixedly connected to the side wall of the second groove 301 by screws. Among them, the air slide valve 34 is fixedly connected to the outer wall of the base 30 by screws. The two clamping assemblies 33 are symmetrical about the axis L of the tool assembly 7. By symmetrically arranging a pair of identical clamping assemblies 33 on both sides of the tool 7, when the pull nail 74 is locked, the force is evenly applied and no deviation occurs.

[0046] The shell 330 is provided with an air port 336, and a high-pressure air chamber 342 for accommodating high-pressure gas is provided inside the shell 330. The air port 336 is connected to the high-pressure air chamber 342, and the air slide valve 34 is fixedly connected to the air port 342 through an air pipe (not shown in the figure). The high-pressure gas enters the high-pressure air chamber 342 through the air port 336, thereby pushing the tightening piston 331 to move.

[0047] The housing 330 is provided with a receiving chamber 341, and the pressing piston 331 is movably received in the receiving chamber 341. The outer periphery of the pressing piston 331 is provided with a second elastic member 333, one end of the second elastic member 333 abuts against the second boss 337 of the pressing piston 331, and the other end abuts against the third boss 338 of the housing 330.

[0048] The tool assembly 7 includes a rivet 74, and the housing 330 is provided with a fourth through hole 334. The head 335 of the tightening piston 334 passes through the fourth through hole 334 and points to the rivet 74. When the high-pressure gas enters the high-pressure gas chamber 342, the head 335 abuts against the rivet 74. The head 335 has a conical tip and is made of steel. The tightening piston 331 also includes a tail 343, and the second boss 337 and the tail 343 can both movably abut against the inner wall of the accommodating chamber 341, and an annular groove 344 is formed between the second boss 337 and the tail 343, and a sealing member 345 is sleeved on the annular groove 344. Among them, the sealing member 345 abuts against the side wall of the annular groove 344 and the inner wall of the accommodating chamber 341 at the same time. In this embodiment, the sealing member 345 is preferably a sealing ring.

[0049] When the tightening piston 331 is relaxed, the tightening piston 331 is moved away from the rivet 74 by the elastic force of the second elastic member 333. When the high-pressure gas drives the tightening piston 331 to overcome the elastic force of the second elastic member 333 and moves, the head 335 abuts against the conical surface 741 of the rivet 74. At this time, the tightening piston 331 changes from a relaxed state to a tightened state. By using the heads 335 of the two tightening pistons 331 to press against the conical surface 741 of the rivet 74 from both sides at the same time, the auxiliary locking of the tool is achieved, so that the measurement accuracy is higher. By using the air slide valve 34 to push the tightening piston 331 to move and tighten and loosen the rivet 74, the tool assembly 7 is prevented from floating upward during the measurement process. The structure is simple, the cost is low, and it is easy to repair and replace. It is also suitable for various types of rivets and has strong adaptability.

[0050] like Figure 7As shown, the base 30 is fixedly connected to the base 5 by screws, and a first groove 300 is provided on the upper surface of the base 30. The tool fixing device also includes a fixed seat 31 and a holder 32. A third groove 310 for placing the tool assembly 7 is provided on the fixed seat 31, and the holder 32 is arranged between the fixed seat 31 and the tool assembly 7. The holder 32 is accommodated in the third groove 310 and the outer wall of the holder 32 abuts against the inner wall of the third groove. The tool assembly 7 is mounted on the holder 32 and abuts against the inner wall of the holder 32. Among them, the fixed seat 31 is accommodated in the first groove 300, the outer wall of the fixed seat 31 abuts against the inner wall of the first groove 300, and the fixed seat 31 is fixedly connected to the base 30 by screws. The fixed seat 31 and the holder 32 are both made of steel. By adopting the steel fixed seat 31, the holder 32 and the tip 335, the taper handle 73 is prevented from being worn during the measurement process, which affects the accuracy.

[0051] A dust cover 35 is also installed on the base 30. Specifically, the base 30 is also fixedly connected with the dust cover 35 by screws, and the dust cover 35 can be covered on the fixing base 31 to reduce the risk of reduced accuracy due to dust entering for a long time without use.

[0052] like Figures 11 to 14 As shown, when in use, hold the handle 215, pull the latch 131 with the index finger, wait for the lock tongue 132 to disengage from the thread groove 126, move the measuring device 2 to the highest point, and ensure that the interference when installing the tool assembly 7 is minimal. Put the tool assembly 7 into the tool fixing device 3, turn the air slide valve 34, and the high-pressure gas enters the shell 330 to push the locking piston 331 to move, and assist in locking the tool 7. Pull down the handle 215 to drive the measuring device 2 to move down to the position where the dial indicator 223 is close to the tool body 71, release the latch 131, and at this time, the lock tongue 132 is reset and inserted into the thread groove 126 under the action of the first elastic member, and manually adjust the Z-direction fine-tuning manual 120 to fine-tune the distance between the needle 224 of the dial indicator 223 and the tool body 71. Then manually adjust the fine-tuning knob 221, and the fine-tuning slide 220 drives the dial indicator 223 to move until the needle 224 touches the outer surface 710 of the tool body 71. Hold the handle 72, manually rotate the tool assembly 7, observe the digital changes of the needle 224, and thus obtain the runout value of the tool body 70. After the measurement, turn the fine adjustment knob 221 to move the dial indicator 223 away from the tool body 71, pull the latch 131, lift the measuring device 2 upward, release the air slide valve 34, and take out the tool assembly 7. If it is not used for a long time, cover it with a dust cover 35 to reduce the risk of reduced accuracy.

[0053] The tool runout measuring instrument of one embodiment of the present invention, by setting a pair of tool fixing devices 1 and a pair of gauge components 21 on one device, realizes the demand of pre-measuring tool runout of the most common BT30 and BT40 two tool components on the same device at the lowest cost, reduces the cost and improves the utilization rate of the equipment. The lead screw 122, the pluggable latch 131 and the fine-tuning hand wheel 120 are set by the switching device 1, so that the measuring device 2 can be switched between the two working states of quick adjustment and fine-tuning adjustment, and the structure is simple, convenient and fast. The counterweight block 118 and the measuring device 2 are fixed on both sides of the pulley 116 by using the connecting line 117. The counterweight block 118 drives one end of the connecting line 117 to move downward under the action of its own gravity, and the other end of the connecting line 117 slides upward around the pulley 116 to drive the measuring device 2 to move upward, so that the measuring device 2 can be fixed on the upper end of the switching device 1, without manual participation in fixing, saving manpower. The first elastic member 133 is set on the latch 131 for resetting and ensuring that the latch 131 is tightly pressed against the thread groove 126. By using the air slide valve 34 to control the high-pressure gas to push the tightening piston 331 to tighten and loosen the pull pin 74, the tool 7 is prevented from floating upward during the measurement process. The structure is simple, the cost is low, it is easy to repair and replace, and it is suitable for various types of pull pins, and it has strong adaptability. By symmetrically arranging a pair of identical tightening components 33 on both sides of the tool 7, when the pull pin 74 is locked, the force is evenly applied and no deviation occurs. By adopting a steel fixing seat 31 and a retaining frame 32, the taper handle 73 is prevented from being worn during the measurement process, which affects the accuracy. By setting a fine-tuning slide 220, the position of the dial indicator 223 and the tool body 71 is adjusted before and after the measurement starts, so that the dial indicator 223 is away from the tool body 71, and the dial indicator 223 is prevented from colliding with the tool body 71, which affects the measurement accuracy. By setting a dust cover 35, when the equipment is not used for a long time, it is covered on the fixing seat 31 to reduce the risk of reduced accuracy due to dust entering.

[0054] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A switching device for a tool runout measuring instrument, wherein: The tool runout measuring instrument comprises a fixed frame (14) and a measuring device (2) for measuring tool runout parameters, characterized in that the switching device comprises a fine-tuning hand wheel (120), a lead screw (122), a sliding assembly (11) and a latch (131), the measuring device (2) comprises a connecting block (210) and a handle (215) fixedly connected to the connecting block (210), the fine-tuning hand wheel (120) is matched with the lead screw (122), and the lead screw (122) is rotatably supported on the connecting block (210). The fixing frame (14) is provided with the connecting block (210) which can be slidably mounted on the lead screw (122); the latch (131) can be slidably received in the connecting block (210) and can be plugged and unplugged to be threadedly connected with the lead screw (122); the sliding assembly (11) is supported on the fixing frame (14) and comprises a counterweight block (118); the counterweight block (118) is fixedly connected to the connecting block (210) via a connecting line (117) and drives the connecting block (210) to move by its own gravity; When quick adjustment is required, the handle (215) is held and the latch (131) is pulled out toward the outside of the connecting block (210), so that the latch (131) is disengaged from the lead screw (122), and the counterweight (118) drives the measuring device (2) to move up and down quickly along the lead screw (122); when fine adjustment is required, the latch (131) is inserted into the inside of the connecting block (210) and matched with the lead screw (122), and the fine adjustment hand wheel (120) is rotated so that the measuring device (2) moves up and down along the lead screw (122) to achieve fine adjustment.

2. The switching device of the tool runout measuring instrument according to claim 1, characterized in that: The switching device further comprises a bearing (121), one end of the lead screw (122) is supported on a fixed frame (14) via the bearing (121), and the fine-tuning hand wheel (120) is located above the bearing (121) and is fixedly sleeved on the lead screw (122).

3. The switching device of the tool runout measuring instrument according to claim 1, characterized in that: The switching device further comprises a connecting sleeve (124), the connecting block (210) is provided with a fifth through hole (216), the connecting sleeve (124) is fixedly received in the fifth through hole (216) and is slidably sleeved on the lead screw (122).

4. The switching device of the tool runout measuring instrument according to claim 3, characterized in that: The connecting block (210) is further provided with a fourth groove (214), the latch pin (131) is slidably received in the fourth groove (214), the inner wall of the fourth groove (214) is provided with a third through hole (212), the connecting sleeve (124) is provided with a second through hole (125), and the locking tongue (132) of the latch pin (131) simultaneously passes through the third through hole (212) and the second through hole (125) and is pluggable and removable to be matched with the thread groove (126) of the lead screw (122).

5. The switching device of the tool runout measuring instrument according to claim 4, characterized in that: The measuring device (2) further comprises a connecting ring (213), the connecting ring (213) being fixedly engaged with the fourth groove (214) and sleeved on the latch (131), a first elastic member (133) being sleeved on the outer periphery of the latch (131), the first elastic member (133) being received in the fourth groove (214) and having one end engaged with the first boss (134) of the latch (131) and the other end engaged with the connecting ring (213).

6. The switching device of the tool runout measuring instrument according to claim 2, characterized in that: The sliding assembly (11) further comprises a pair of pulleys (116), the connecting line (117) can slide around the pulleys (116) and one end of the connecting line (117) is fixedly connected to the counterweight block (118), and the other end passes through the pulley (116) and is fixedly connected to the connecting block (210), the counterweight block (118) drives one end of the connecting line (117) to move downward under the action of its own gravity, and the other end of the connecting line (117) slides upward around the pulley (116) to drive the connecting block (210) to move upward.

7. The switching device of the tool runout measuring instrument according to claim 8, characterized in that: The sliding assembly (11) further comprises a first sliding rail (112) and a first sliding block (114); the first sliding rail (112) is arranged on one side of the fixing frame (14); the first sliding block (114) is slidably connected to the first sliding rail (112); and the first sliding block (114) is fixedly connected to the connecting block (210).

8. The switching device of the tool runout measuring instrument according to claim 7, characterized in that: The sliding assembly (11) further comprises a second sliding rail (113) and a second sliding block (115); the second sliding rail (113) is mounted on the other side of the fixing frame (14); the second sliding block (115) is slidably connected to the second sliding rail (113); and the counterweight (118) is fixed on the second sliding block (115).

9. The switching device of the tool runout measuring instrument according to claim 6, characterized in that: The pair of pulleys (116) are fixedly supported on the fixed frame (14) and are respectively located above the first slide rail (112) and the second slide rail (113).

10. The switching device of the tool runout measuring instrument according to claim 1, characterized in that: The tool runout measuring instrument further comprises a pair of tool fixing devices (3) mounted on both sides of the base (5); the measuring device (2) comprises a pair of gauge assemblies (22) mounted on the connecting block (210); the pair of tool fixing devices (3) and the pair of gauge assemblies (22) are symmetrically arranged on both sides of the switching device.

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