Device for accurately measuring cross-rod distance of worm gear with even teeth

Abstract

The invention discloses a device for accurately measuring the cross-rod distance of a worm gear with even teeth, and the device comprises a fixed bottom plate assembly, a worm gear installation assembly is slidably installed on the fixed bottom plate assembly, a fixed measurement assembly is fixedly installed on one side of the fixed bottom plate assembly at two sides of the worm gear installation assembly, and a sliding measurement assembly is slidably installed on the other side of the fixed bottom plate assembly. A spring is connected between the fixed measuring assembly and the sliding measuring assembly, the oppositely arranged end faces of the fixed measuring assembly and the sliding measuring assembly are respectively provided with a measuring bar I and a measuring bar II which horizontally extend towards the worm gear mounting assembly, and the ball heads of the measuring bar I and the measuring bar II are in the same vertical plane. Wherein the worm gear installation assembly can realize the installation of a worm gear with even teeth, and the sliding measurement assembly is driven by a spring to move towards the fixed measurement assembly along a guide rail, so that measuring bars on the fixed measurement assembly and the sliding measurement assembly are clamped into tooth grooves of the worm gear with even teeth, and the distance between a measuring bar I and a measuring bar II is measured; and comparing the measured distance value with the designed cross-rod distance tolerance value to judge whether the product is a qualified product or not.

Description

Technical Field

[0001] The invention relates to a device for measuring the span of a rod, in particular to a device for accurately measuring the span of a rod of a worm gear with even teeth. Background Art

[0002] Since worm drive has the characteristics of large transmission ratio, compact structure, smooth transmission, low vibration and noise, it is used in many industries. When the lead angle in the worm gear transmission is less than the friction angle, it will self-lock, and the self-locking reliability is high. Based on the self-locking characteristics, it is used in precision transmission fields such as aviation and aerospace. Precision transmission also has higher precision requirements for worm wheels and worms. The parameters that affect the transmission accuracy of worms mainly include: tooth profile angle, tooth profile error, helix error, cross-rod distance and center distance with worm wheels, which can be accurately measured through conventional instruments and equipment; the parameters that affect the transmission accuracy of worm wheels mainly include: tooth profile angle, cumulative tolerance of tooth pitch, limit deviation of tooth pitch, ring runout, cross-rod distance and center distance with worm wheels. The tooth profile angle, cumulative tolerance of tooth pitch, limit deviation of tooth pitch, ring runout and center distance with worm wheels can be accurately measured through conventional instruments and equipment. Due to the special tooth profile and tooth direction structure of worm wheels, the cross-rod distance cannot be measured by ordinary measuring rods. The worm wheel span directly affects the idle clearance of the worm gear transmission. A large idle clearance affects the operating position accuracy of the transmission mechanism. A too small idle clearance may cause the mechanism to jam under low-temperature operation. Therefore, accurate measurement of the worm wheel span is crucial in worm gear transmission. Summary of the invention

[0003] The purpose of the present invention is to provide a device for accurately measuring the span of an even-numbered worm wheel. The device can accurately measure the span of an even-numbered worm wheel, accurately control the idle clearance of a worm gear transmission mechanism through detection data, and ensure that the worm gear transmission mechanism can be applied to places with design requirements such as high-precision transmission, high reliability, and high margin.

[0004] The technical solution of the present invention is: a device for accurately measuring the span of an even-numbered-tooth worm gear, comprising a fixed base plate assembly, a worm gear mounting assembly being slidably mounted on the fixed base plate assembly, a fixed measuring assembly being fixedly mounted on one side of the fixed base plate assemblies on both sides of the worm gear mounting assembly, and a sliding measuring assembly being slidably mounted on the other side, a spring being connected between the fixed measuring assembly and the sliding measuring assembly, measuring rods I and II being horizontally extended toward the worm gear mounting assembly being respectively arranged on the end surfaces of the fixed measuring assembly and the sliding measuring assembly which are arranged facing each other, and the ball heads of the measuring rods I and II are in the same vertical plane.

[0005] In the aforementioned device for accurately measuring the span of an even-tooth worm gear, the fixed base plate assembly includes a guide rail, which is fixed to the surface of the fixed base plate via locking screws.

[0006] In the aforementioned device for accurately measuring the cross-rod spacing of an even-numbered worm gear, the fixed measuring assembly includes a fixed bracket with a door-type structure, the fixed bracket is fixed on the fixed base plate of the fixed base plate assembly, a screw fixing plate is laterally fixed inside the lower end of the fixed bracket, a self-locking screw and two nut guide columns are arranged between the screw fixing plate and the top plate of the fixed bracket, the self-locking screw is located between the two nut guide columns, a rotating handle I is connected to the upper end of the self-locking screw, a self-locking screw nut is threadedly sleeved on the self-locking screw located inside the fixed bracket, a slot is respectively provided on the front and rear sides of the self-locking screw nut, the nut guide column is inserted into the slot, and two measuring rods I are horizontally fixed to the end face of the self-locking screw nut facing the worm gear mounting assembly, and the ball heads of the two measuring rods I are in the same vertical plane.

[0007] In the aforementioned device for accurately measuring the span of an even-tooth worm gear, a bearing is sleeved on each of the two ends of the self-locking screw, and the two bearings are respectively embedded in the screw fixing plate and the top plate of the fixed bracket, and a bearing pressure plate is also fixed to the top surface of the top plate of the fixed bracket; the screw fixing plate is fixed to the fixed bracket by a plurality of locking screws, one of which is longer than the other screws and is fixed with a locking nut, and the extended part is connected to one end of the spring; the measuring rod I is fixed to the self-locking screw nut via the locking screw.

[0008] In the aforementioned device for accurately measuring the span of an even-numbered worm gear, the worm gear mounting assembly includes a sliding base, a worm gear mounting assembly slider is fixed to the bottom of the sliding base, the worm gear mounting assembly slider is slidably sleeved on the guide rail of the fixed base plate assembly, and a worm gear fixing tool is provided on the top surface of the sliding base. The upper end head of the worm gear fixing tool is a threaded structure, and also includes a worm gear gasket and a worm gear locking nut that can be sleeved with the worm gear fixing tool.

[0009] In the aforementioned device for accurately measuring the span of an even-tooth worm gear, the worm gear mounting assembly slider and the worm gear fixing fixture are respectively fixed to the sliding base by locking screws, and the worm gear fixing fixture and the sliding base are connected by shaft and hole matching.

[0010] In the aforementioned device for accurately measuring the cross-rod spacing of an even-numbered worm gear, the sliding measuring assembly includes a sliding bracket with a door-type structure, a sliding measuring assembly slider is fixed at the bottom of the sliding bracket, the sliding measuring assembly slider is slidably sleeved on the guide rail of the fixed bottom plate assembly, a screw fixing plate is laterally fixed inside the lower end of the sliding bracket, a self-locking screw and two nut guide columns are arranged between the screw fixing plate and the top plate of the sliding bracket, the self-locking screw is located between the two nut guide columns, a rotating handle II is connected to the upper end of the self-locking screw, a self-locking screw nut is threadedly sleeved on the self-locking screw located inside the sliding bracket, a slot is respectively provided on the front and rear sides of the self-locking screw nut, the nut guide column is inserted into the slot, two measuring rods II are horizontally fixed to the end face of the self-locking screw nut facing the worm gear mounting assembly, and the ball heads of the two measuring rods II are in the same vertical plane.

[0011] In the aforementioned device for accurately measuring the span of an even-tooth worm gear, a bearing is sleeved on each of the two ends of the self-locking screw, and the two bearings are respectively embedded in the screw fixing plate and the sliding bracket top plate, and a bearing pressure plate is also fixed to the top surface of the sliding bracket top plate; the screw fixing plate is fixed to the sliding bracket by a plurality of locking screws, one of which is longer than the other screws and is fixed with a locking nut, and the extended part is connected to one end of the spring; the measuring rod II is fixed to the self-locking screw nut via the locking screw.

[0012] In the aforementioned device for accurately measuring the span of an even-numbered-tooth worm gear, a micrometer assembly is also installed on the fixed base plate assembly outside the worm gear mounting assembly.

[0013] In the above-mentioned device for accurately measuring the span of an even-tooth worm gear, the micrometer assembly includes a magnetic meter frame fixed on the fixed base plate of the fixed base plate assembly, and a lever micrometer is arranged on the magnetic meter frame.

[0014] Beneficial effects of the present invention: Compared with the prior art, the device of the present invention includes a fixed base plate assembly, a fixed measuring assembly, a worm gear installation assembly, a sliding measuring assembly and a micrometer assembly, wherein the worm gear installation assembly can realize the installation of an even-numbered worm gear, and the sliding measuring assembly moves along the guide rail toward the fixed measuring assembly driven by a spring, so that the measuring rods on the fixed measuring assembly and the sliding measuring assembly are inserted into the tooth grooves of the even-numbered worm gear, and the spacing between measuring rods I and II is measured. The measured spacing value is compared with the designed span-rod spacing tolerance value to determine whether it is a qualified product. The device can realize batch precision measurement of even-numbered worm gears. The device has the following advantages: 1. The device of the present invention can indirectly measure the worm gear tooth thickness tolerance and obtain effective data, providing data support for the reliability, safety, high precision and high margin of the design. 2. The device of the present invention can replace the rough detection process of the transmission and ensure the accuracy of the measurement process; 3. The device of the present invention can improve the processing efficiency of batches of even-numbered worm gears; 4. The device of the present invention can improve the inspection efficiency of batches of even-numbered worm gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an axonometric diagram of the measuring device of the present invention; Figure 2 An exploded view of the measuring device assembly of the present invention; Figure 3 It is a schematic diagram of the structure of the base plate assembly; Figure 4 Schematic diagram of the fixed measurement component structure Figure 5 Schematic diagram of the worm gear installation assembly structure Figure 6 Schematic diagram of the sliding measurement component structure Figure 7 Schematic diagram of span measurement.

[0016] Figure markings: 1-fixed base plate, 2-guide rail, 3-even-tooth worm gear, 4-fixed bracket, 5-self-locking screw nut, 6-self-locking screw, 7-screw fixing plate, 8-rotating handle I, 9-nut guide column, 10-measuring rod I, 11-bearing, 12-bearing pressure plate, 13-sliding bracket, 14-rotating handle II, 15-measuring rod II, 16-sliding base, 17-worm gear fixing tooling, 18-worm gear mounting assembly slider, 19-worm gear gasket, 20-worm gear locking nut, 21-spring, 22-locking screw, 23-locking nut, 24-magnetic table stand, 25-lever micrometer, 26-sliding measuring assembly slider. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0018] Embodiments of the present invention: The "cross-bar distance" described in the present invention is a professional term. The cross-bar distance is an important parameter for measuring the tooth thickness of a gear, and indirectly reflects the tooth thickness of the pitch circle of the gear. Figure 7 As shown, the gear in the schematic diagram is an external gear, the measuring rod is a standard measuring rod, the measuring rod selection standard refers to HB 2077-89, the cross-rod distance measurement standard value is M, and the cross-rod distance measurement deviation △E M , when the actual value is M+△E M When the tooth thickness decreases, the actual value is M-△E M Tooth thickness increases.

[0019] The present invention measures the span-bar distance of an even-numbered worm wheel 3 according to the method of measuring span-bar distance of an external gear, and reflects the tooth thickness of the worm wheel pitch circle in an indirect manner. The worm wheel is different from the gear. The root of the worm wheel tooth is in an arc shape and has a spiral angle. Therefore, the span-bar distance measurement of the worm wheel needs to measure the middle dimension position of half of the worm wheel thickness direction dimension. The worm wheel thickness L is set, and the middle dimension position of half of the worm wheel thickness direction dimension is L / 2. By comparing the measured span-bar distance dimension with the designed span-bar distance tolerance value, it is possible to check whether the worm wheel is a qualified product.

[0020] A device for accurately measuring the span of an even-numbered-tooth worm gear comprises a fixed base plate assembly, a worm gear mounting assembly is slidably mounted on the fixed base plate assembly, a fixed measuring assembly is fixedly mounted on one side of the fixed base plate assemblies on both sides of the worm gear mounting assembly, and a sliding measuring assembly is slidably mounted on the other side, a spring 21 is connected between the fixed measuring assembly and the sliding measuring assembly, and measuring rods I10 and II15 extending horizontally toward the worm gear mounting assembly are respectively arranged on the end surfaces of the fixed measuring assembly and the sliding measuring assembly that are arranged facing each other, that is, the fixed measuring assembly is provided with a measuring rod I10, and the sliding measuring assembly is provided with a measuring rod II15, and the ball heads of the measuring rods I10 and II15 are in the same vertical plane.

[0021] During use, the worm gear installation assembly can realize the installation of the even-numbered worm gear 3, and the sliding measuring assembly slides toward the fixed measuring assembly driven by the spring 21. When the measuring rod Ⅱ15 presses against the even-numbered worm gear 3, the worm gear installation assembly is driven to slide toward the fixed measuring assembly under the elastic force of the spring 21, and finally the measuring rod Ⅰ10 and the measuring rod Ⅱ15 on the fixed measuring assembly and the sliding measuring assembly are respectively inserted into the tooth grooves of the even-numbered worm gear 3, and the spacing between the measuring rod Ⅰ10 and the measuring rod Ⅱ15 is measured. The measured spacing value is compared with the designed cross-rod spacing tolerance value to determine whether the measured even-numbered worm gear 3 is a qualified product.

[0022] The fixed base plate assembly includes a guide rail 2, which is fixed to the surface of the fixed base plate 1 via locking screws 22. The worm gear mounting assembly and the sliding measuring assembly are slidably mounted on the guide rail 2 and can move back and forth along the guide rail 2 in a straight line.

[0023] The fixed measuring assembly includes: a fixed bracket 4, a self-locking screw nut 5, a self-locking screw 6, a screw fixing plate 7, a rotating handle Ⅰ8, a nut guide column 9, a measuring rod Ⅰ10, a bearing 11, a bearing pressure plate 12, a locking screw 22 and a locking nut 23.

[0024] The specific connection structure is as follows: a fixed bracket 4 of a door-type structure is fixed on a fixed base plate 1 of a fixed base plate assembly, a screw fixing plate 7 is laterally fixed inside the lower end of the fixed bracket 4, a self-locking screw 6 and two nut guide columns 9 are arranged between the screw fixing plate 7 and the top plate of the fixed bracket 4, the self-locking screw 6 is located between the two nut guide columns 9, a rotating handle I8 is connected to the upper end of the self-locking screw 6, a self-locking screw nut 5 is threadedly sleeved on the self-locking screw 6 located inside the fixed bracket 4, a slot is respectively provided on the front and rear sides of the self-locking screw nut 5, the nut guide column 9 is snapped into the slot, two measuring rods I10 are horizontally fixed to the end face of the self-locking screw nut 5 facing toward the worm gear mounting assembly, and the ball heads of the two measuring rods I10 are in the same vertical plane.

[0025] The self-locking screw 6 has a bearing 11 sleeved on each of its two ends, and the two bearings 11 are respectively embedded in the screw fixing plate 7 and the top plate of the fixed bracket 4, and a bearing pressure plate 12 is also fixed to the top surface of the top plate of the fixed bracket 4; the screw fixing plate 7 is fixed to the fixed bracket 4 by a plurality of locking screws 22, one of which is longer than the other screws and is fixed by a locking nut 23, and the extended part is connected to one end of the spring 21; the measuring rod I10 is fixed to the self-locking screw nut 5 by the locking screw 22.

[0026] In the fixed measuring assembly, the fixed bracket 4 and the screw fixing plate 7 fix the two ends of the self-locking screw 6. The screw fixing plate 7 is fixed to the fixed bracket 4 by four locking screws 22. One locking screw 22 is longer than the other screws and is fixed with a locking nut 23. The extended part is used to hang the spring 21. A bearing 11 is installed at each end of the self-locking screw 6. The bearing 11 can improve the rotation efficiency and stability of the self-locking screw 6; the bearing pressure plate 12 is used to tighten the bearing clearance of the outer ring of the bearing 11. Through the four locking screws 2 2 Tighten the self-locking screw 6; the self-locking screw nut 5 and the self-locking screw 6 are used in pairs, and the rotating handle Ⅰ8 is turned to drive the self-locking screw 6 to rotate so that the self-locking screw nut 5 moves up and down along the screw axis; in the fixed component diagram, the fixed measuring component has two measuring rods Ⅰ10, and the two measuring rods Ⅰ10 are fixed to the right side of the self-locking screw nut 5 by two locking screws 22. The ball heads of the two measuring rods Ⅰ10 are in the same vertical plane. When the self-locking screw nut 5 moves up and down along the screw axis, the two measuring rods Ⅰ10 move accordingly.

[0027] The worm gear installation assembly includes a sliding base 16 , a worm gear fixing tool 17 , a worm gear installation assembly slider 18 , a worm gear gasket 19 , a worm gear locking nut 20 , and a locking screw 22 .

[0028] The specific structure is: a worm gear installation assembly slider 18 is fixed to the bottom of the sliding base 16, and the worm gear installation assembly slider 18 is slidably sleeved on the guide rail 2 of the fixed base plate assembly. A worm gear fixing tool 17 is provided on the top surface of the sliding base 16. The upper end head of the worm gear fixing tool 17 is a threaded structure, and also includes a worm gear gasket 19 and a worm gear locking nut 20 that can be sleeved with the worm gear fixing tool 17.

[0029] The worm gear installation assembly slider 18 and the worm gear fixing fixture 17 are fixed to the sliding base 16 by locking screws 22 respectively, and the worm gear fixing fixture 17 and the sliding base 16 are connected by shaft and hole matching.

[0030] In the worm gear installation assembly, the sliding base 16 and the worm gear installation assembly slider 18 are connected by four locking screws 22, the worm gear fixing fixture 17 and the sliding base 16 are connected by shaft and hole matching, and the two are matched by the basic hole system; after the worm gear fixing fixture 17 and the sliding base 16 are installed, the worm gear fixing fixture 17 cannot rotate after being locked by the locking screws 22; the worm gear fixing fixture 17 and the even-numbered worm gear 3 are connected by shaft and hole matching, and the two are matched by the basic hole system. After installing the even-numbered worm gear 3, the worm gear gasket 19 and the worm gear locking nut 20 are installed in sequence to fix the even-numbered worm gear 3.

[0031] The sliding measuring assembly includes a self-locking screw nut 5, a self-locking screw 6, a screw fixing plate 7, a nut guide column 9, a bearing 11, a bearing pressure plate 12, a sliding bracket 13, a rotating handle II 14, a measuring rod II 15, a locking screw 22 and a sliding measuring assembly slider 26. The sliding measuring assembly and the fixed measuring assembly have similar structures, the only difference being that the sliding measuring assembly is provided with a sliding measuring assembly slider 26 so that the sliding measuring assembly can slide.

[0032] The specific structure is as follows: a sliding measuring assembly slider 26 is fixed at the bottom of the sliding bracket 13 of the door-type structure, and the sliding measuring assembly slider 26 is slidably sleeved on the guide rail 2 of the fixed bottom plate assembly. A screw fixing plate 7 is horizontally fixed inside the lower end of the sliding bracket 13, and a self-locking screw 6 and two nut guide columns 9 are arranged between the screw fixing plate 7 and the top plate of the sliding bracket 13. The self-locking screw 6 is located between the two nut guide columns 9, and a rotating handle II14 is connected to the upper end of the self-locking screw 6. A self-locking screw nut 5 is threadedly sleeved on the self-locking screw 6 located inside the sliding bracket 13, and a slot is respectively provided on the front and rear sides of the self-locking screw nut 5, and the nut guide column 9 is inserted into the slot. Two measuring rods II15 are horizontally fixed to the end face of the self-locking screw nut 5 facing the worm gear mounting assembly, and the ball heads of the two measuring rods II15 are in the same vertical plane.

[0033] The self-locking screw 6 is sleeved with a bearing 11 at each end, and the two bearings 11 are respectively embedded in the screw fixing plate 7 and the top plate of the sliding bracket 13, and a bearing pressure plate 12 is also fixed to the top surface of the top plate of the sliding bracket 13; the screw fixing plate 7 is fixed to the sliding bracket 13 by a plurality of locking screws 22, one of which is longer than the other screws and is fixed with a locking nut 23, and the extended part is connected to one end of the spring 21; the measuring rod II 15 is fixed to the self-locking screw nut 5 through the locking screw 22.

[0034] In the structure of the sliding measurement assembly, the sliding bracket 13 and the screw fixing plate 7 fix the two ends of the self-locking screw 6. The screw fixing plate 7 is fixed to the sliding bracket 13 by four locking screws 22. One locking screw 22 is longer than the other screws and is fixed by a locking nut 23. The extended part is used to hang the other end of the spring 21. A bearing 11 is installed at each end of the self-locking screw 6. The bearing pressure plate 12 is used to tighten the bearing clearance of the outer ring of the bearing 11, and the self-locking screw 6 is pressed by four locking screws 22. The self-locking screw nut 5 and the self-locking screw 6 are used in pairs. Turning the rotating handle Ⅱ14 drives the self-locking screw 6 to rotate so that the self-locking screw nut 5 moves up and down along the screw axis. In the sliding measurement assembly diagram, the sliding measurement assembly has two measuring rods Ⅱ15. The two measuring rods Ⅱ15 are fixed to the left side of the self-locking screw nut 5 by two locking screws 22. The ball heads of the two measuring rods Ⅱ15 are in the same vertical plane. When the self-locking screw nut 5 moves up and down along the screw axis, the two measuring rods Ⅱ15 move accordingly.

[0035] A dial gauge assembly is also installed on the fixed base plate assembly outside the worm gear mounting assembly. The dial gauge assembly includes a magnetic gauge frame 24 fixed on the fixed base plate 1 of the fixed base plate assembly, and a lever dial gauge 25 is arranged on the magnetic gauge frame 24.

[0036] During the measurement process of the present invention, the worm gear installation assembly is first installed: the even-toothed worm gear 3, the worm gear fixing fixture 17, the worm gear gasket 19, the worm gear locking nut 20, the sliding base 16 and the locking screw 22 are installed in sequence, and the worm gear locking nut 20 is locked after assembly. The locking screw 22 cannot be locked during the installation process to ensure that the worm gear fixing fixture 17 can rotate on the sliding base 16. After all the installation is completed, the locking screw 22 is locked. After the installation of the worm gear installation assembly is completed, the L / 2 size height position of the worm gear is found through conventional measurement methods, and the rotating handle Ⅰ8 in the fixed measuring assembly is rotated to adjust the center height position of the measuring rod Ⅰ10 at the bottom of the fixed measuring assembly so that the center height position of the measuring rod Ⅰ10 at the bottom of the fixed measuring assembly is the same as the worm gear L / 2 size height position. In the sliding measuring assembly, the handle Ⅱ14 is rotated to adjust the center height position of the measuring rod Ⅱ15 at the bottom of the sliding measuring assembly so that the center height position of the measuring rod Ⅱ15 at the bottom of the sliding measuring assembly is The height position of the worm wheel L / 2 is equal to that of the worm wheel; after the installation is completed in sequence, the spring 21 is hung on the locking screw 22 with the locking nut 23 in the fixed measuring assembly and the sliding measuring assembly. The spring 21 will be compressed and tightened, so that the measuring rod I10 and the measuring rod II15 are against the tooth groove of the even-numbered worm wheel 3. If the worm wheel fixing fixture 17 is not rotated in the tooth groove, the measuring rod I10 and the measuring rod II15 are located in the tooth groove, and then the locking screw 22 of the worm wheel installation assembly is locked to ensure that the even-numbered worm wheel 3 cannot rotate or move axially during the measurement process. After the assembly is installed, measure the spacing between the measuring rod I10 and the measuring rod II15 at the top of the fixed measuring assembly and the sliding measuring assembly. Compare the measured spacing value with the designed cross-rod distance tolerance value to determine whether the even-numbered worm wheel is a qualified product. If it is a batch measurement, first record the specific value of the first worm gear span measured, install the probe of the lever micrometer 25 on the left end face of the self-locking screw nut 5 in the sliding measuring assembly, adjust the lever micrometer 25 to zero position, pull out the spring 21, loosen the locking screw 22 of the worm gear installation assembly, replace the even-numbered worm gear 3, and then reinstall the even-numbered worm gear 3 to be measured. After completing the installation, directly read the value of the lever micrometer 25. If the value of the lever micrometer 25 increases, the span becomes larger, and if the value of the micrometer decreases, the span decreases.

[0037] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art. The conventional connection methods in the prior art are not described in detail here; the locking screw 22 and the locking nut 23 described in the present invention can be selected in different sizes according to the content of the invention; the measuring rod I10 and the measuring rod II15 described in the present invention are of the same specifications, and the different names are for better explanation of the content of the invention; the rotating handle I8 and the rotating handle II14 described in the present invention are of the same specifications, and the different names are for better explanation of the content of the invention; the sliding base 16 and the worm gear mounting assembly slider 18 described in the present invention are used in conjunction with the guide rail 2, and the length and specifications can be selected according to the specific structure; the sliding measuring assembly slider 26 described in the present invention is used in conjunction with the guide rail 2, and the length and specifications can be selected according to the specific structure; the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0038] In the description of the present invention, it is necessary to understand that the terms "left and right" and "looking down" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its equivalent replacement or change with new concepts, should be covered within the protection scope of the present invention.

Claims

1. A device for accurately measuring the span of an even-numbered worm gear, characterized in that: The invention comprises a fixed base plate assembly, a worm gear mounting assembly is slidably mounted on the fixed base plate assembly, a fixed measuring assembly is fixedly mounted on one side of the fixed base plate assembly on both sides of the worm gear mounting assembly, and a sliding measuring assembly is slidably mounted on the other side, a spring (21) is connected between the fixed measuring assembly and the sliding measuring assembly, and measuring rods I (10) and II (15) are respectively arranged on the end surfaces of the fixed measuring assembly and the sliding measuring assembly facing each other and extending horizontally toward the worm gear mounting assembly, and the ball heads of the measuring rods I (10) and II (15) are in the same vertical plane.

2. The device for accurately measuring the span of an even-numbered worm gear according to claim 1, characterized in that: The fixed base plate assembly comprises a guide rail (2), and the guide rail (2) is fixed on the surface of the fixed base plate (1) via locking screws (22).

3. The device for accurately measuring the span of an even-numbered worm gear according to claim 1, characterized in that: The fixed measuring assembly comprises a fixed bracket (4) with a door-shaped structure, the fixed bracket (4) being fixed on a fixed base plate (1) of a fixed base plate assembly, a screw fixing plate (7) being fixed laterally inside the lower end of the fixed bracket (4), a self-locking screw (6) and two nut guide pillars (9) being arranged between the screw fixing plate (7) and the top plate of the fixed bracket (4), the self-locking screw (6) being located between the two nut guide pillars (9), a rotating handle I (8) being connected to the upper end of the self-locking screw (6), a self-locking screw nut (5) being threadedly sleeved on the self-locking screw (6) located inside the fixed bracket (4), a clamping groove being provided on the front and rear sides of the self-locking screw nut (5), the nut guide pillar (9) being clamped into the clamping groove, two measuring rods I (10) being horizontally fixed on the end surface of the self-locking screw nut (5) facing the worm gear mounting assembly, and the ball heads of the two measuring rods I (10) being in the same vertical plane.

4. The device for accurately measuring the span of an even-numbered worm gear according to claim 3, characterized in that: The self-locking lead screw (6) is sleeved with a bearing (11) at each end, and the two bearings (11) are respectively embedded in the lead screw fixing plate (7) and the top plate of the fixing bracket (4), and a bearing pressure plate (12) is also fixed to the top surface of the top plate of the fixing bracket (4); the lead screw fixing plate (7) is fixed to the fixing bracket (4) by a plurality of locking screws (22), one of the locking screws (22) is longer than the other screws and is fixed by a locking nut (23), and the extended portion is connected to one end of the spring (21); the measuring rod I (10) is fixed to the self-locking lead screw nut (5) via the locking screw (22).

5. The device for accurately measuring the span of an even-numbered worm gear according to claim 1, characterized in that: The worm gear mounting assembly comprises a sliding base (16), a worm gear mounting assembly slider (18) being fixed at the bottom of the sliding base (16), the worm gear mounting assembly slider (18) being slidably sleeved on a guide rail (2) of a fixed base plate assembly, a worm gear fixing fixture (17) being arranged on the top surface of the sliding base (16), the upper end of the worm gear fixing fixture (17) being a threaded structure, and further comprising a worm gear gasket (19) and a worm gear locking nut (20) which can be sleeved on the worm gear fixing fixture (17).

6. The device for accurately measuring the span of an even-numbered worm gear according to claim 5, characterized in that: The worm gear installation assembly slider (18) and the worm gear fixing fixture (17) are respectively fixed to the sliding base (16) by means of locking screws (22), and the worm gear fixing fixture (17) and the sliding base (16) are connected by means of a shaft and a hole.

7. The device for accurately measuring the span of an even-numbered worm gear according to claim 1, characterized in that: The sliding measuring assembly comprises a sliding bracket (13) with a door-shaped structure, a sliding measuring assembly slider (26) being fixed at the bottom of the sliding bracket (13), the sliding measuring assembly slider (26) being slidably sleeved on a guide rail (2) of a fixed bottom plate assembly, a screw fixing plate (7) being laterally fixed inside the lower end of the sliding bracket (13), a self-locking screw (6) and two nut guide columns (9) being arranged between the screw fixing plate (7) and the top plate of the sliding bracket (13), the self-locking screw (6) being located Between the two nut guide pillars (9), the upper end of the self-locking screw (6) is connected to a rotating handle II (14), and the self-locking screw nut (5) is threadedly sleeved on the self-locking screw (6) located inside the sliding bracket (13). The self-locking screw nut (5) is provided with a clamping groove on the front and rear sides respectively, and the nut guide pillar (9) is clamped into the clamping groove. Two measuring rods II (15) are horizontally fixed to the end surface of the self-locking screw nut (5) facing the worm gear mounting assembly, and the ball heads of the two measuring rods II (15) are in the same vertical plane.

8. The device for accurately measuring the span of an even-numbered worm gear according to claim 7, characterized in that: The self-locking screw (6) is sleeved with a bearing (11) at each end, and the two bearings (11) are respectively embedded in the screw fixing plate (7) and the top plate of the sliding bracket (13), and a bearing pressure plate (12) is also fixed to the top surface of the top plate of the sliding bracket (13); the screw fixing plate (7) is fixed to the sliding bracket (13) by a plurality of locking screws (22), one of the locking screws (22) is longer than the other screws and is fixed by a locking nut (23), and the extended part is connected to one end of the spring (21); the measuring rod II (15) is fixed to the self-locking screw nut (5) via the locking screw (22).

9. The device for accurately measuring the span of an even-numbered worm gear according to claim 1, characterized in that: A dial indicator assembly is also installed on the fixed base plate assembly outside the worm gear installation assembly.

10. The device for accurately measuring the span of an even-numbered worm gear according to claim 9, characterized in that: The micrometer assembly comprises a magnetic meter frame (24) fixed on a fixed base plate (1) of a fixed base plate assembly, and a lever micrometer (25) is arranged on the magnetic meter frame (24).

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