Gear backlash measuring tool

Abstract

The utility model provides a gear backlash measuring tool, which relates to the technical field of measuring tools and comprises a vertical plate, a dial indicator clamping assembly, a dial indicator, a first gear limiting and fixing structure, a strip-shaped through hole, a connecting structure, a second gear limiting and fixing structure, a measured gear and a fixed gear. A tested gear is clamped and limited in the middle of the outer wall of the second gear limiting and fixing structure, the first gear limiting and fixing structure is rotationally assembled on the vertical plate, the tested gear is clamped and limited in the middle of the outer wall of the first gear limiting and fixing structure, the connecting structure moves up and down and then is limited, and the distance between the tested gear and the fixed gear is adjusted. Fixed gears of different sizes and a measured gear are assembled into a gear pair within a certain range, the gear backlash is measured through the dial indicator clamping assembly, the gear backlash of the gear pair is measured in an external environment, and the gear backlash is prevented from being limited by the working environment of the gear pair.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring tool technical field especially is related to a gear side gap measuring tool. BACKGROUND

[0002] The side gap of a gear refers to the amount of circumferential wobble of one gear when the other gear is fixed, calculated as the arc length on the reference circle. In order to ensure the formation of a normal lubricating oil film between the tooth surfaces and prevent the teeth from being stuck due to thermal expansion deformation caused by the increase in the working temperature of the gear, the gears must have an appropriate gear side gap when they are engaged. Currently, gear side gap is mainly measured by fixing a dial gauge next to the measured part, fixing the output shaft, and moving the input shaft back and forth to observe the gear side gap by the change in the dial gauge scale.

[0003] The existing gear side gap measuring tool is usually measured in the working environment of the gear pair, rather than assembling the measured gear and the fixed gear into a gear pair externally to measure the gear side gap. The measurement in the working environment is greatly limited, for example, the installation space is small, which is not convenient for the measurement of the measuring tool, and there are limitations in use. SUMMARY

[0004] The utility model discloses a kind of gear side gap measuring tools, with the advantage that gear side gap of gear pair is measured in external environment, avoid the limitation of gear pair working environment, solve the technical problem that the existing gear side gap measuring tool is greatly limited in working environment.

[0005] The utility model provides a kind of gear side gap measuring tool, comprising:

[0006] Vertical plate, its side wall upper end transverse fixed assembly is equipped with dial gauge clamping assembly, and the lower end of dial gauge clamping assembly is clamped with dial gauge;

[0007] First gear limiting fixed structure, its lateral rotation is assembled in the middle of the same side of the side wall dial gauge clamping assembly of vertical plate;

[0008] Strip-shaped through hole, its longitudinal is set up in the upper part of the middle of vertical plate;

[0009] The connecting structure is detachably fixed in the strip-shaped through hole;

[0010] Second gear limiting fixed structure, its lateral rotation is assembled in the end of the same side of the connecting structure of the side wall dial gauge clamping assembly of vertical plate;

[0011] The second gear limiting fixed structure outer wall middle part is clamped and limited with measured gear, and the first gear limiting fixed structure outer wall middle part is clamped and limited with fixed gear;

[0012] The measured gear and fixed gear are assembled into gear pair.

[0013] The lower end of the dial gauge clamping assembly abuts against the upper end of the measured gear.

[0014] As a further optimization, in order to respectively limit and fix the fixed gear and the measured gear, avoid the two gears from shaking due to unstable fixation, and ensure the accuracy of the gear backlash measurement result, the second gear limiting and fixing structure and the first gear limiting and fixing structure are the same in structure.

[0015] The second gear limiting and fixing structure comprises:

[0016] A limiting round rod, the measured gear is sleeved and limited and fixed in the middle part of the outer wall of the limiting round rod;

[0017] The first clamping piece and the second clamping piece are symmetrically detachably fixed to the left and right sides of the outer wall of the limiting round rod;

[0018] The inner side telescopic end of the first clamping piece and the second clamping piece abuts against the same side outer wall of the measured gear.

[0019] As a further optimization, in order to clamp the measured gear between the first clamping piece and the second clamping piece through synchronous operation of the first clamping piece and the second clamping piece, enhance the fixing strength and stability, the first clamping piece and the second clamping piece are the same in structure.

[0020] The second clamping piece comprises:

[0021] An annular plate, a sleeve ring is fixedly connected to the middle part thereof;

[0022] The annular plate and the sleeve ring are slidingly sleeved on the outside of the limiting round rod;

[0023] First fixing bolts are screwed on the upper and lower sides of the outer wall of the sleeve ring, and the distal end of the first fixing bolt abuts against the outer wall of the limiting round rod;

[0024] Electric push rods are fixedly connected to the upper and lower sides of the outer side of the annular plate, and the inner side telescopic end of the electric push rod penetrates the annular plate;

[0025] A conical block is fixedly assembled at the inner side telescopic distal end of the electric push rod.

[0026] As a further optimization, in order to limit and fix the measured gear sleeved on the outer wall from the inside, the limiting round rod comprises:

[0027] A round rod body, a strip-shaped groove is formed in the middle part of the front and rear side walls of the round rod body along the length direction;

[0028] A gas cylinder is fixedly assembled on the inner side wall of the strip-shaped groove along the length direction, and an arc-shaped plate is fixedly connected to the outer side telescopic end of the gas cylinder;

[0029] The arc-shaped plate is slidingly assembled in the same side of the strip-shaped groove;

[0030] The front and rear corresponding cylinders are synchronously operated, and the cylinders are connected with an external gas supply system.

[0031] As a further optimization scheme, in order to limit and fix in the strip-shaped through hole, and to remove the limit and fix the second gear limit and fix structure and then limit and fix again when needed, the connecting structure comprises:

[0032] The sliding block is slidingly assembled in the strip-shaped through hole;

[0033] The screw rod is transversely screwed in the sliding block;

[0034] The screw rod is screwed with a fixed nut at both ends;

[0035] The screw rod is sleeved with a gasket at both ends, and the gasket is clamped between the inner side of the fixed nut and the same side of the outer wall of the sliding block.

[0036] As a further optimization scheme, in order to stably clamp the dial gauge, the dial gauge clamping assembly comprises:

[0037] The horizontal plate is fixedly assembled on the upper end of the same side of the second gear limit and fix structure of the vertical plate;

[0038] The horizontal plate is fixedly assembled with a sleeve on the bottom surface;

[0039] The connecting rod of the dial gauge is inserted into the sleeve;

[0040] The sleeve is screwed with a limit bolt at the lower end of the outer wall, and the limit bolt abuts against the connecting rod of the dial gauge.

[0041] As a further optimization scheme, in order to facilitate stable support of the device, a bottom plate is further included;

[0042] The connecting reinforcing structure is assembled between the lower end of the vertical plate away from the dial gauge clamping assembly and the bottom plate.

[0043] As a further optimization scheme, in order to enhance the connection and fixing strength between the vertical plate and the bottom plate, the connecting reinforcing structure comprises:

[0044] Two triangular plates are fixedly assembled on the front and rear edges of the lower end of the vertical plate away from the dial gauge clamping assembly;

[0045] The strip-shaped plate is fixedly assembled on the lower end of the inner side of the front and rear triangular plates;

[0046] The second fixed bolt is inserted into the upper surface of the strip-shaped plate, and the lower end of the second fixed bolt is screwed to the upper surface of the bottom plate.

[0047] As a further optimization scheme, in order to facilitate the device and the ground or other platform fixed connection, the bottom plate comprises:

[0048] The upper surface of the bottom plate body is provided with a threaded hole corresponding to the lower end of the second fixing bolt, and the lower end of the second fixing bolt is screwed into the threaded hole;

[0049] The upper surface of the bottom plate body is provided with a mounting through hole at each corner.

[0050] As a further optimization scheme, in order to better fix the vertical plate, a strip-shaped slot is provided on the upper surface of the bottom plate body corresponding to the lower end of the vertical plate, and the lower end of the vertical plate is inserted into the strip-shaped slot.

[0051] The utility model discloses a gear backlash measuring tool, which has the following improvements and advantages compared with the prior art:

[0052] The end of the second gear limiting and fixing structure is rotatably assembled at the end of the connecting structure, the connecting structure can be limited and fixed in the strip-shaped through hole, and when needed, the second gear limiting and fixing structure is released from the limiting and is slid up and down to a specified position and is then limited and fixed in the strip-shaped through hole again, the middle part of the outer wall of the second gear limiting and fixing structure clamps and limits the measured gear, the first gear limiting and fixing structure is rotatably assembled on the vertical plate, the middle part of the outer wall of the first gear limiting and fixing structure clamps and limits the measured gear, the distance between the measured gear and the fixed gear is adjusted after the connecting structure is moved up and down, the different sizes of the fixed gear and the measured gear are assembled as a gear pair within a certain range, the gear backlash is measured through the dial indicator clamping assembly, the gear backlash of the gear pair is measured in the external environment, and the limitation of the working environment of the gear pair is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0054] Figure 1 It is a structural schematic view of the utility model;

[0055] Figure 2 It is a structural schematic view of the second gear limiting and fixing structure of the utility model;

[0056] Figure 3 It is a structural schematic view of the limiting round rod cross section of the utility model;

[0057] Figure 4 It is the structural schematic view of the connecting structure of the utility model;

[0058] Figure 5 It is the structural schematic view of the dial gauge clamping assembly of the utility model;

[0059] Figure 6 It is the structural schematic view of the bottom plate of the utility model.

[0060] Mark explanation:

[0061] 1-stand plate, 2-dial gauge clamping assembly, 21-sleeve, 22-limit bolt, 3-dial gauge, 4-second gear limit fixing structure, 41-limit round bar, 411-round bar main body, 412-strip-shaped recess, 413-cylinder, 414-arc plate, 42-first clamping piece, 43-second clamping piece, 431-ring plate, 432-sleeve ring, 433-first fixed bolt, 434-electric push rod, 435-conical block, 5-first gear limit fixing structure, 6-measured gear, 7-fixed gear, 8-strip-shaped through hole, 9-connecting structure, 91-screw rod, 92-sliding block, 93-fixed nut, 94-washer, 10-connecting reinforcing structure, 101-triangle plate, 102-strip-shaped plate, 103-second fixed bolt, 11-bottom plate, 111-bottom plate main body, 112-mounting through hole, 113-strip-shaped slot, 114-screw hole. DETAILED DESCRIPTION

[0062] The technical scheme of the utility model will be described below in conjunction with the embodiments, obviously, the described embodiments are a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0063] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0064] In the description of the utility model, need understanding is, the term "first", "second" is only used for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the utility model, "a plurality of" means two or more than two, unless otherwise specifically limited. In addition, the terms "mounting", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0065] Please refer to Figures 1-6 The utility model provides technical scheme:

[0066] The side wall upper end of vertical plate 1 is fixedly equipped with dial gauge clamping assembly 2 horizontally, and dial gauge clamping assembly 2 lower end clamps dial gauge 3, and dial gauge clamping assembly 2 lower end abuts on the upper end of the gear 6 to be measured, and dial gauge 3 is prior art, and when using, the second gear limiting and fixing structure 4 is shaken back and forth, and the side clearance of the gear to be measured is observed and measured by the change of dial gauge scale;

[0067] The first gear limiting and fixing structure 5 is horizontally rotatably equipped in the middle of the same side of the side wall dial gauge clamping assembly 2 of vertical plate 1, and the first gear limiting and fixing structure 5 is rotatable with fixed gear 7, and the use environment is simulated;

[0068] Strip-shaped through hole 8 is longitudinally arranged on the upper side of the middle of vertical plate 1;

[0069] The connecting structure 9 is detachably fixed in the strip-shaped through hole 8 horizontally, and the connecting structure 9 is detachably fixed in the strip-shaped through hole 8, and after disassembly, the connecting structure 9 can move up and down with the second gear limiting and fixing structure 4, and after moving to the specified position, the connecting structure 9 is fixed in the strip-shaped through hole 8 again, and the position of the current second gear limiting and fixing structure 4 is limited and fixed;

[0070] The second gear limiting and fixing structure 4 is rotatably equipped in the end of the connecting structure 9 of the same side of the side wall dial gauge clamping assembly 2 of vertical plate 1 horizontally, and the second gear limiting and fixing structure 4 is rotatable with the gear 6 to be measured, and the use environment is simulated;

[0071] The second gear limiting and fixing structure 4 is rotatably equipped in the end of the connecting structure 9 of the same side of the side wall dial gauge clamping assembly 2 of vertical plate 1 horizontally, and the second gear limiting and fixing structure 4 is rotatable with the gear 6 to be measured, and the use environment is simulated;

[0072] The measured gear 6 and the fixed gear 7 are assembled as a gear pair, are limited up and down through the connecting structure 9, the distance between the measured gear 6 and the fixed gear 7 is adjusted, different sizes of the fixed gear 7 and the measured gear 6 are assembled as a gear pair in a certain range, the gear backlash is measured through the dial gauge clamping assembly 2, the gear backlash of the gear pair is measured in the external environment, and the limitation of the working environment of the gear pair is avoided.

[0073] In some embodiments, in order to respectively limit and fix the fixed gear 7 and the measured gear 6, avoid shaking of the two due to unstable fixation, and ensure the accuracy of the gear backlash measurement result, the second gear limiting and fixing structure 4 and the first gear limiting and fixing structure 5 are the same in structure;

[0074] The second gear limiting and fixing structure 4 comprises:

[0075] The limiting round rod 41 is sleeved and limitedly fixed in the middle part of the outer wall of the limiting round rod 41, and is supported and limited from the inner side of the measured gear 6 through the limiting round rod 41;

[0076] The first clamping piece 42 and the second clamping piece 43 are symmetrically and detachably fixed on the left and right sides of the outer wall of the limiting round rod 41;

[0077] The inner side telescopic end of the first clamping piece 42 and the second clamping piece 43 abuts against the same side outer wall of the measured gear 6, and clamps and limits the measured gear 6 from the outside, and the inner and outer cooperation improves the stability of the positioning of the measured gear 6, and the positioning mode of the fixed gear 7 is the same as that of the measured gear 6.

[0078] In some embodiments, in order to clamp the measured gear 6 between the first clamping piece 42 and the second clamping piece 43 through synchronous operation of the first clamping piece 42 and the second clamping piece 43, the fixing strength and stability are enhanced, and the first clamping piece 42 and the second clamping piece 43 are the same in structure;

[0079] The second clamping piece 43 comprises:

[0080] The annular plate 431 is fixedly connected with the sleeve ring 432 in the middle part;

[0081] The annular plate 431 and the sleeve ring 432 are slidingly sleeved on the outer side of the limiting round rod 41;

[0082] First fixing bolts 433 are screwed on the upper and lower sides of the outer wall of the sleeve ring 432, and the tail ends of the first fixing bolts 433 abut against the outer wall of the limiting round rod 41;

[0083] Electric push rods 434 are fixedly connected perpendicularly on the upper and lower sides of the outer side of the annular plate 431, and the inner side telescopic ends of the electric push rods 434 penetrate the annular plate 431;

[0084] The inner telescopic end of the electric push rod 434 is fixedly equipped with a tapered block 435, the electric push rod 434 is connected with an external power supply, the upper and lower electric push rods 434 are synchronously operated to drive the tapered block 435 to abut against the same side of the outer wall of the measured gear 6, and the first clamping part 42 and the second clamping part 43 are used to clamp the measured gear 6 in the middle part.

[0085] In some embodiments, in order to limit and fix the measured gear 6 sleeved on the outer wall from the inner side, the limiting round rod 41 comprises:

[0086] The middle part of the front and rear side walls of the round rod main body 411 is provided with a strip-shaped groove 412 along the length direction;

[0087] The inner side wall of the strip-shaped groove 412 is uniformly and vertically fixedly equipped with an air cylinder 413 along the length direction, and the outer telescopic end of the air cylinder 413 is fixedly connected with an arc-shaped plate 414;

[0088] The arc-shaped plate 414 is slidingly equipped in the same side strip-shaped groove 412;

[0089] The front and rear corresponding air cylinders 413 are synchronously operated, the air cylinders 413 are connected with an external gas supply system, the air cylinders 413 in the middle part of the strip-shaped groove 412 are synchronously stretched, the arc-shaped plate 414 is used to abut against the inner ring surface of the measured gear 6, and the measured gear 6 is supported and limited.

[0090] In some embodiments, in order to limit and fix in the strip-shaped through hole 8 and to remove the limiting and fixing of the second gear limiting and fixing structure 4 for moving up and down again for limiting and fixing, the connecting structure 9 comprises:

[0091] A sliding block 92 is slidingly equipped in the strip-shaped through hole 8;

[0092] A screw rod 91 is transversely screwed in the sliding block 92;

[0093] Fixed nuts 93 are screwed at both ends of the screw rod 91;

[0094] A washer 94 is sleeved at both ends of the screw rod 91, the washer 94 is clamped between the inner side end of the fixed nut 93 and the same side of the outer wall of the sliding block 92, the two fixed nuts 93 are screwed at both ends of the screw rod 91 to clamp the washer 94 between the inner side end of the fixed nut 93 and the same side of the outer wall of the sliding block 92, and the screw rod 91 is fixed in the strip-shaped through hole 8 of the outer wall of the vertical plate 1 by clamping of the two fixed nuts 93.

[0095] In some embodiments, in order to stably clamp the dial gauge 3, the dial gauge clamping assembly 2 comprises:

[0096] A horizontal plate is fixedly equipped on the same side upper end of the second gear limiting and fixing structure 4 of the vertical plate 1;

[0097] A sleeve 21 is fixedly equipped on the middle part of the bottom surface of the horizontal plate;

[0098] The connecting rod of the dial gauge 3 is inserted into the sleeve 21;

[0099] The outer wall of the sleeve 21 is screwed with a limiting bolt 22 at the lower end, and the end of the limiting bolt 22 abuts against the outer wall of the connecting rod of the dial gauge 3.

[0100] In some embodiments, in order to facilitate stable support of the device, a bottom plate 11 is further included;

[0101] The connecting reinforcing structure 10 is assembled between the lower end of the vertical plate 1 away from the dial gauge clamping assembly 2 and the bottom plate 11, and the bottom plate 11 is placed on the ground or a platform.

[0102] In some embodiments, in order to enhance the connection and fixing strength between the vertical plate 1 and the bottom plate 11, the connecting reinforcing structure 10 includes:

[0103] Two triangular plates 101 are arranged in parallel at the front and back, and the two triangular plates 101 are fixedly assembled to the front and back edges of the lower end of the vertical plate 1 away from the dial gauge clamping assembly 2;

[0104] The inner side of the front and back triangular plates 101 is fixedly assembled with a strip-shaped plate 102 at the lower end;

[0105] The upper surface of the strip-shaped plate 102 is penetrated by a second fixing bolt 103 at the front and back sides, and the lower end of the second fixing bolt 103 is screwed to the upper surface of the bottom plate 11. The whole of the two sides of the triangular plate 101 and the strip-shaped plate 102 is a three-dimensional triangular shape, which has high stability.

[0106] In some embodiments, in order to facilitate the fixed connection of the device with the ground or other platforms, the bottom plate 11 includes:

[0107] The upper surface of the bottom plate main body 111 is provided with a screw hole 114 corresponding to the lower end of the second fixing bolt 103, and the lower end of the second fixing bolt 103 is screwed into the corresponding screw hole 114;

[0108] The upper surface of the bottom plate main body 111 is provided with a mounting through hole 112 at each corner, a plug rod is fixed to the ground through the mounting through hole 112, and a screw is fixed to a reserved screw hole of other platforms through the mounting through hole 112.

[0109] In some embodiments, in order to better fix the vertical plate 1, a strip-shaped slot 113 is provided on the upper surface of the bottom plate main body 111 corresponding to the lower end of the vertical plate 1, and the lower end of the vertical plate 1 is inserted into the strip-shaped slot 113 for positioning and better fixing of the vertical plate 1.

[0110] Working principle:

[0111] The first gear limiting and fixing structure 5 is transversely rotatably assembled at the middle of the same side of the dial gauge clamping assembly 2 of the side wall of the vertical plate 1, the first gear limiting and fixing structure 5 is rotatable with the fixed gear 7, and the second gear limiting and fixing structure 4 is transversely rotatably assembled at the end of the connecting structure 9 of the same side of the dial gauge clamping assembly 2 of the side wall of the vertical plate 1, the second gear limiting and fixing structure 4 is rotatable with the measured gear 6, and the use environment is simulated;

[0112] The connecting structure 9 is transversely detachably fixed in the strip-shaped through hole 8, the connecting structure 9 is detachably fixed in the strip-shaped through hole 8, after being detached, the connecting structure 9 can move up and down with the second gear limiting and fixing structure 4, after being moved to a specified position, the connecting structure 9 is fixed in the strip-shaped through hole 8 again, the position of the current second gear limiting and fixing structure 4 is limited and fixed, the distance between the measured gear 6 and the fixed gear 7 is adjusted, different sizes of the fixed gear 7 and the measured gear 6 are assembled as a gear pair in a certain range, the gear side clearance is measured by the dial gauge clamping assembly 2, the gear side clearance of the gear pair is measured in the external environment, and the limitation of the working environment of the gear pair is avoided.

[0113] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gear backlash measuring tool characterized by, Include: Vertical plate (1), the upper end of the side wall is transversely fixedly equipped with dial gauge clamping assembly (2), and the lower end of the dial gauge clamping assembly (2) clamps dial gauge (3); The first gear limiting fixed structure (5) is transversely rotatably equipped in the middle of the same side of the dial gauge clamping assembly (2) of the side wall of the vertical plate (1); The strip-shaped through hole (8) is longitudinally arranged on the upper part of the middle of the vertical plate (1); The connecting structure (9) is transversely detachably fixed in the strip-shaped through hole (8); The second gear limiting fixed structure (4) is transversely rotatably equipped in the end of the connecting structure (9) of the same side of the dial gauge clamping assembly (2) of the side wall of the vertical plate (1); The measured gear (6) is clamped and limited in the middle of the outer wall of the second gear limiting fixed structure (4), and the fixed gear (7) is clamped and limited in the middle of the outer wall of the first gear limiting fixed structure (5); The measured gear (6) and the fixed gear (7) are equipped as a gear pair; The lower end of the dial gauge clamping assembly (2) abuts against the upper end of the measured gear (6).

2. A gear backlash measuring tool according to claim 1, wherein, The second gear limiting fixed structure (4) and the first gear limiting fixed structure (5) are the same structure; The second gear limiting fixed structure (4) comprises: The measured gear (6) is sleeved and limitedly fixed in the middle of the outer wall of the limiting round rod (41); The first clamping piece (42) and the second clamping piece (43) are symmetrically and detachably fixed in the outer wall of the limiting round rod (41) on the left and right sides; The inner side telescopic end of the first clamping piece (42) and the second clamping piece (43) abuts against the outer wall of the same side of the measured gear (6).

3. A gear backlash measuring tool according to claim 2, wherein, The first clamping piece (42) and the second clamping piece (43) are the same structure; The second clamping piece (43) comprises: The annular plate (431) is fixedly connected with the sleeve ring (432) in the middle; The annular plate (431) and the sleeve ring (432) are slidably sleeved on the outer side of the limiting round rod (41); The first fixed bolt (433) is screwed on the outer wall of the sleeve ring (432) on the upper and lower sides, and the tail end of the first fixed bolt (433) abuts against the outer wall of the limiting round rod (41); The electric push rod (434) is perpendicularly fixedly connected on the outer side of the annular plate (431) on the upper and lower sides, and the inner side telescopic end of the electric push rod (434) penetrates the annular plate (431); The conical block (435) is fixedly equipped on the inner side telescopic end of the electric push rod (434).

4. A gear backlash measuring tool according to claim 2, wherein, The limiting round rod (41) comprises: The strip-shaped grooves (412) are uniformly and perpendicularly fixedly equipped on the inner side wall along the length direction of the round rod main body (411); The arc-shaped plate (414) is slidably equipped in the same side of the strip-shaped groove (412); The corresponding gas cylinders (413) are synchronously operated, and the gas cylinders (413) are connected with the external gas supply system. The connecting structure (9) comprises:

5. A gear backlash measuring tool according to claim 1 wherein, The slider (92) is slidably equipped in the strip-shaped through hole (8); The screw rod (91) is transversely screwed in the slider (92). ​ The screw rod (91) is screwed with a fixed nut (93) at both ends; The screw rod (91) is sleeved with a gasket (94) at both ends, and the gasket (94) is clamped between the inner side of the fixed nut (93) and the same side of the outer wall of the sliding block (92).

6. A gear backlash measuring tool according to claim 1 wherein, The dial gauge clamping assembly (2) comprises: A horizontal plate is fixedly assembled on the upper end of the same side of the second gear limiting and fixing structure (4) of the vertical plate (1); A sleeve (21) is fixedly assembled on the bottom surface of the horizontal plate; The connecting rod of the dial gauge (3) is inserted into the sleeve (21); The lower end of the outer wall of the sleeve (21) is screwed with a limiting bolt (22), and the end of the limiting bolt (22) abuts against the connecting rod of the dial gauge (3).

7. A gear backlash measuring tool according to claim 1 wherein, It also includes a bottom plate (11); A connecting reinforcing structure (10) is assembled between the lower end of the side of the vertical plate (1) away from the dial gauge clamping assembly (2) and the bottom plate (11).

8. A gear backlash measuring tool according to claim 7, wherein, The connecting reinforcing structure (10) comprises: Two triangular plates (101) are arranged in parallel in front of and behind each other, and the two triangular plates (101) are fixedly assembled on the front and rear edges of the lower end of the side of the vertical plate (1) away from the dial gauge clamping assembly (2); A strip-shaped plate (102) is fixedly assembled on the inner side of the lower end of the front and rear triangular plates (101); Second fixing bolts (103) are penetrated on both sides of the upper surface of the strip-shaped plate (102), and the lower ends of the second fixing bolts (103) are screwed on the upper surface of the bottom plate (11).

9. A gear backlash measuring tool according to claim 8, wherein, The bottom plate (11) comprises: A bottom plate body (111), a screw hole (114) is formed on the upper surface of the bottom plate body (111) corresponding to the lower end of the second fixing bolt (103), and the lower end of the second fixing bolt (103) is screwed into the corresponding screw hole (114); Mounting through holes (112) are formed at the four corners of the upper surface of the bottom plate body (111).

10. A gear backlash measuring tool according to claim 9, wherein, A strip-shaped slot (113) is formed on the upper surface of the bottom plate body (111) corresponding to the lower end of the vertical plate (1), and the lower end of the vertical plate (1) is inserted into the strip-shaped slot (113).

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