Bore diameter measuring instrument for reducer parts

Abstract

The present invention discloses an aperture measuring instrument for reducer parts, relates to a reducer, and aims to solve the problem of insufficient measurement accuracy of the inner diameter of a plug-in hole. The key points of the technical solution are: an aperture measuring instrument for reducer parts, including an inner diameter micrometer, the inner diameter micrometer including a measuring column, a measuring head and a dial, the aperture measuring instrument also includes a stabilizing frame and a zeroing auxiliary part, the stabilizing frame includes a base, a column and a lifting seat, the base is provided with a control component for controlling the lifting and lowering of the lifting seat, the column is provided with a clamping part for clamping and fixing the measuring column, and the upper end surface of the lifting seat is provided with a positioning component for positioning the spindle body. The aperture measuring instrument for reducer parts of the present invention avoids the influence of the measuring accuracy due to the shaking of the arm of the inspector, and ensures the concentricity of the inner diameter micrometer in the process of penetrating into the plug-in hole, thereby realizing the measurement of the entire depth range of the plug-in hole.

Description

Technical Field

[0001] The invention relates to a reducer, and more particularly to an aperture measuring instrument for reducer parts. Background Art

[0002] A reducer is an independent component consisting of a gear drive, worm drive, or gear-worm drive enclosed in a rigid housing. It is often used as a reduction transmission device between the prime mover and the working machine.

[0003] like Figure 7 The figure shows the sun gear input shaft of a planetary reducer using a gear transmission, which includes a main shaft body 91, a shrink sleeve 92 arranged at one end of the main shaft body 91, and a sun gear 93 arranged at the other end of the main shaft body 91, wherein a plug hole 94 is opened at the center of the end face of the main shaft body 91, and the sun gear 93 is provided with a plug-in column 95 that is plugged into the plug-in hole 94, so that the sun gear 93 is coaxially fixed with the main shaft body 91 by plugging the plug-in column 95 into the plug-in hole 94.

[0004] In actual production, since the connection strength between the plug-in column 95 and the plug-in hole 94 will directly affect the maximum torque of the reducer, the plug-in hole 94 and the plug-in column 95 need higher dimensional accuracy requirements. In order to ensure that the dimensional accuracy of the plug-in hole 94 meets the assembly requirements, the plug-in hole 94 of each input shaft needs to be measured before assembly.

[0005] In the prior art, for measuring the aperture of the plug-in hole 94, a measurement operator generally holds an internal diameter micrometer, adjusts it to zero, and guides its measuring rod to insert it into the plug-in hole 94, thereby completing the aperture measurement; however, such a measurement method may affect the measurement accuracy due to the shaking of the measurement operator's arm; therefore, a new solution is needed to solve this problem. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a bore measuring instrument for reducer components, which avoids the influence of measurement accuracy due to the shaking of the inspector's arm and ensures the concentricity of the inside diameter micrometer when it penetrates into the plug hole, thereby realizing measurement within the entire depth range of the plug hole.

[0007] The above technical purpose of the present invention is achieved through the following technical solutions: an aperture measuring instrument for reducer parts, including an inside diameter micrometer, the inside diameter micrometer includes a measuring column, a measuring head arranged at the bottom end of the measuring column, and a dial arranged at the top end of the measuring column, the aperture measuring instrument also includes a stabilizing frame and a zeroing auxiliary part, the stabilizing frame includes a base with an internal hollow design, a column vertically fixed to the base, and a lifting seat connected to the base in a liftable manner, the base is provided with a control component for controlling the lifting and lowering of the lifting seat, the column is provided with a clamping member for clamping and fixing the measuring column, and the upper end surface of the lifting seat is provided with a positioning component for positioning the spindle body.

[0008] By adopting the above technical scheme, in the normal state of the present invention, the measuring column of the inside diameter micrometer is clamped and fixed by the clamping member, thereby completing the assembly of the inside diameter micrometer and the stabilizing frame; when it is needed, the sun gear input shaft of the plug hole diameter to be measured is vertically placed on the lifting seat, and the position of the main shaft body is positioned by the positioning assembly to ensure that the central axis of the main shaft body and the central axis of the lifting seat are in line, thereby ensuring that the plug hole is aligned with the measuring head of the inside diameter micrometer; after the placement of the main shaft body is completed, the zeroing auxiliary piece is sleeved on the top of the main shaft body, and the lifting seat is driven to rise by the control assembly until the measuring head is inserted into the zeroing auxiliary piece, thereby using the zeroing auxiliary piece as a standard to adjust the dial of the inside diameter micrometer to the zero scale; after completing the zeroing of the dial, the lifting seat is driven to descend by the control assembly, the zeroing auxiliary piece is removed and The lifting seat is raised again. During this process, the measuring column of the inside diameter micrometer gradually penetrates into the plug-in hole, so that the measuring head completes the measurement of the diameter within the entire depth range of the plug-in hole, and the dial displays the numerical difference between the plug-in hole and the zeroing auxiliary part. Therefore, the measurement personnel only needs to observe whether the numerical difference is always within the theoretical tolerance to determine whether the aperture of the plug-in hole meets the assembly requirements. In summary, the present invention fixes the inside diameter micrometer on a stabilizing frame and places the spindle body to be measured on the lifting seat, thereby utilizing the vertical lifting of the lifting seat to complete the measurement of the inner diameter of the plug-in hole. Compared with the prior art, on the one hand, it avoids the influence of measurement accuracy due to arm shaking of the detection personnel, and on the other hand, ensures the concentricity of the inside diameter micrometer in the process of penetrating into the plug-in hole, thereby realizing measurement within the entire depth range of the plug-in hole.

[0009] The present invention is further configured as follows: a sliding hole is formed through the upper end surface of the base, the lifting seat is slidingly connected to the sliding hole, and a wrapping edge is provided along the edge of the sliding hole in the inner cavity of the base.

[0010] By adopting the above technical solution, the lifting seat achieves the technical requirement of being lifted and connected to the base by cooperating with the sliding hole, and an additional wrapping edge is provided to wrap the lifting seat, thereby increasing the connection amount between the base and the lifting seat, and further improving the sliding stability of the lifting seat.

[0011] The present invention is further configured as follows: the lifting assembly includes an upper push block slidably connected to the bottom surface of the inner cavity of the base, a control shaft rotatably connected to the base, and a two-link rod assembly arranged between the control shaft and the upper push block; the upper push block has a height difference contact surface that is arc-shaped when viewed from the side, and the height difference contact surface abuts against the bottom end of the lifting seat, and the two-link rod assembly includes a first rod member and a second rod member, one end of the first rod member is fixed to the control shaft, and the other end is hinged to the second rod member, and the other end of the second rod member is hinged to the upper push block.

[0012] By adopting the above technical scheme, when it is necessary to control the lifting seat to rise, the driving control shaft rotates counterclockwise, thereby driving the active end of the first rod member to approach the upward push block, and after the force transmission of the second rod member, the upper push block is pushed to slide, and then the height difference contact surface generates an upward driving force on the lifting seat, and the upper push block is driven to rise by the upper thrust; when it is necessary to control the lifting seat to descend, the driving control shaft rotates clockwise, thereby driving the active end of the first rod member to move away from the upper push block, and after the force transmission of the second rod member, the upper push block is pulled to reset and slide, during which the lowest point of the height difference contact surface gradually approaches the bottom of the lifting seat, so that the lifting seat descends due to the lack of bottom support under the action of gravity; in summary, it is only necessary to drive the control shaft to rotate in different directions to achieve the technical effect of controlling the lifting seat to rise or fall by the lifting assembly, and achieve the technical effect of more convenient control.

[0013] The present invention is further configured as follows: a roller is rotatably connected to the bottom end of the lifting seat, and the roller abuts against the height difference contact surface.

[0014] By adopting the above technical solution, the sliding friction between the bottom end of the lifting seat and the height difference contact surface is replaced by rolling friction with smaller friction using a roller, thereby effectively reducing the friction resistance between the lifting seat and the upper push block. On the one hand, it effectively prevents mutual wear between the two, and on the other hand, it achieves the technical effect of smoother lifting of the lifting seat.

[0015] The present invention is further configured as follows: the specific number of the two-link assembly is two, a first connecting cross bar is arranged between the midpoints of the two first rods, and a second connecting cross bar is arranged between the midpoints of the two second rods.

[0016] By adopting the above technical solution, the number of two-link assemblies is limited to two, thereby improving the balance of the thrust or pull applied to the upper push block; and a first connecting cross bar and a second connecting cross bar are added to achieve mutual connection between the two first rod members and mutual connection between the two second rod members, thereby improving the structural strength of the two connecting rod assemblies.

[0017] The present invention is further configured as follows: one end of the control shaft extends out of the base and is vertically fixed with a handle bar.

[0018] By adopting the above technical solution, the hand grip provides a force application point for rotating the control axis, thereby providing convenience for the measurement personnel to rotate the control axis.

[0019] The present invention is further configured as follows: the base thread is matched with a hand-tightening bolt, and the hand-tightening bolt is abutted and matched with the upper push block.

[0020] By adopting the above technical solution, when it is necessary to read the value on the dial in detail, the hand-tightened bolt can be tightened, so as to utilize the friction between the hand-tightened bolt and the upper push block to limit the activity of the upper push block, thereby limiting the lifting and lowering of the lifting seat, effectively avoiding value jumps when reading the value in detail.

[0021] The present invention is further configured as follows: the positioning assembly includes a cross body that is a cross in a top view, and fan-shaped edges that are respectively arranged between the various angles of the cross body, the four ends of the cross body are all hemispherical in design, and are all tangent to the inner circumferential surface of the shrink sleeve, and the fan-shaped edges are threaded with assembly bolts that are screwed into the lifting seat.

[0022] By adopting the above technical solution, the four ends of the cross body are tangent to the inner circumferential surface of the shrink sleeve at the same time, so that the central axis of the main shaft body and the central axis of the lifting seat can be ensured to be in line with each other, and the technical effect of the positioning component positioning the input shaft of the sun gear to be measured is achieved; a fan-shaped edge is set on the cross body, and the cross body and the lifting seat are fixed with assembly bolts, so as to achieve a replaceable connection between the two, and then different positioning components can be replaced to adapt to shrink sleeves with different inner diameters.

[0023] The present invention is further configured as follows: the upper end surface of the lifting seat is provided with four positioning protrusions respectively embedded in four angles of the cross body.

[0024] By adopting the above technical solution, the lifting seat is additionally provided with a positioning protrusion, so that the positioning of the cross body can be achieved when the positioning component is replaced.

[0025] The present invention is further configured as follows: the clamping member is provided with a sliding sleeve which is slidably sleeved with the column, the sliding sleeve has a clamping opening, and the sliding sleeve is threadedly matched with a clamping bolt which crosses the clamping opening.

[0026] By adopting the above technical solution, when the height of the inside diameter micrometer needs to be adjusted, the clamping bolt is loosened to slide the sliding sleeve longitudinally. When the adjustment is completed, the clamping bolt is tightened to force the sliding sleeve to shrink and clamp the column, thereby limiting the sliding range of the sliding sleeve along the length direction of the column and effectively preventing it from sliding abnormally.

[0027] In summary, the present invention has the following beneficial effects: the vertical lifting of the lifting seat is used to complete the measurement of the inner diameter of the plug-in hole, which, on the one hand, avoids the influence of the measuring accuracy on the measuring accuracy due to the arm shaking of the inspector, and on the other hand ensures the concentricity of the inner diameter micrometer in the process of penetrating into the plug-in hole, thereby realizing the measurement of the entire depth range of the plug-in hole; the additional wrapping edge is used to wrap the lifting seat, thereby increasing the connection amount between the base and the lifting seat, thereby improving the sliding stability of the lifting seat; the technical effect of controlling the lifting seat to rise or fall by the lifting assembly can be achieved by only driving the control shaft to rotate in different directions, thereby achieving a technical effect of more convenient control; the sliding friction between the bottom end of the lifting seat and the height difference contact surface is replaced by rolling friction with smaller friction force by using rollers, thereby effectively reducing the friction resistance between the lifting seat and the upper push block; the number of two-link assemblies is limited to two, from The balance of the thrust or pull applied to the upper push block is improved; a first connecting cross bar and a second connecting cross bar are added to realize the mutual connection between the two first rods and the mutual connection between the two second rods, thereby improving the structural strength of the two connecting rod assemblies; a force application point for a rotating control shaft is provided by a hand grip, thereby providing convenience for the measurement personnel to rotate the control shaft; tightening the hand bolt limits the range of motion of the upper push block, thereby limiting the lifting and lowering of the lifting seat, and effectively avoiding the occurrence of numerical jumps when reading the detailed values; a fan-shaped edge is set on the cross body, and the cross body and the lifting seat are fixed with assembly bolts, thereby realizing a replaceable connection between the two, and then different positioning components can be replaced to adapt to shrink sleeves with different inner diameters; a positioning bump is added to the lifting seat, thereby realizing the positioning of the cross body when replacing the positioning component. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the present invention during the zeroing process;

[0029] Figure 2 This is a schematic diagram of the present invention during the measurement process. To facilitate the representation of the internal structure of the base, the base is partially cut away;

[0030] Figure 3 This is a schematic diagram of the present invention with some structures hidden, mainly showing the structure of the control component;

[0031] Figure 4 It is a schematic diagram of the lifting seat and the positioning assembly of the present invention when they are replaced;

[0032] Figure 5 This is a schematic diagram of the structure of the present invention without placing the sun gear input shaft, mainly showing the matching relationship between the clamping member and the column;

[0033] Figure 6 It is a structural schematic diagram of the zero adjustment auxiliary component of the present invention, and for the convenience of representation, the figure is partially cross-sectionally processed;

[0034] Figure 7 It is a schematic diagram of the structure of the sun gear input shaft. In this figure, the sun gear and the main shaft body are separated.

[0035] Description of the drawings: 1. Inside micrometer; 11. Measuring column; 12. Measuring head; 13. Dial; 2. Stabilizing frame; 21. Base; 22. Column; 23. Lifting seat; 24. Clamping piece; 25. Sliding hole; 26. Wrapping edge; 27. Push-up block; 28. Control shaft; 29. ​​First rod; 30. Second rod; 31. Roller; 32. First connecting cross bar; 33. Second connecting cross bar; 34. Hand grip; 35. Tightening bolt; 36. Cross body; 37. Fan-shaped edge; 38. Assembly bolt; 39. Positioning protrusion; 40. Sliding sleeve; 41. Clamp; 42. Clamping bolt; 5. Zero adjustment auxiliary piece; 51. Sleeve; 52. Standard hole; 91. Spindle body; 92. Shrink sleeve; 93. Sun gear; 94. Plug hole; 95. Plug column. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] Aperture measuring instruments for reducer parts, such as Figure 1 , Figure 2 As shown, it includes an inside micrometer 1, the inside micrometer 1 includes a measuring column 11, a measuring head 12 installed at the bottom end of the measuring column 11, and a dial 13 installed at the top end of the measuring column 11, and the aperture measuring instrument also includes a stabilizing frame 2 and a zeroing auxiliary component 5; the stabilizing frame 2 includes a base 21 with an internal hollow design, a column 22 vertically fixed to the base 21, and a lifting seat 23 connected to the base 21 in a liftable manner, a control component for controlling the lifting of the lifting seat 23 is arranged in the base 21, the column 22 is provided with a clamping member 24 for clamping and fixing the measuring column 11, and a positioning component for positioning the main shaft body 91 is arranged on the upper end surface of the lifting seat 23; the zeroing auxiliary component 5 is cylindrical as a whole, and a sleeve 51 (marked at) is arranged at its bottom end to be sleeved with the top end of the main shaft body 91 Figure 6 ), a standard hole 52 is provided on its upper end surface.

[0038] In the normal state of the present invention, the measuring column 11 of the inside diameter micrometer is clamped and fixed by the clamping member 24, thereby completing the assembly of the inside diameter micrometer 1 and the stabilizing frame 2; when it is needed, the sun gear input shaft of the plug hole 94 to be measured is vertically placed on the lifting seat 23, and the position of the main shaft body 91 is positioned by the positioning assembly to ensure that the central axis of the main shaft body 91 is in line with the central axis of the lifting seat 23, thereby ensuring that the plug hole 94 is aligned with the measuring head 12 of the inside diameter micrometer 1; after the placement of the main shaft body 91 is completed, the zero adjustment auxiliary member 5 is sleeved on the top of the main shaft body 91, and the lifting seat 23 is driven to rise by the control assembly until the measuring head 12 is inserted into the zero adjustment auxiliary member 5, thereby using the zero adjustment auxiliary member 5 as a standard to adjust the dial 13 of the inside diameter micrometer 1 to the zero scale; after the zero adjustment of the dial 13 is completed, the lifting seat 23 is driven to descend by the control assembly, the zero adjustment auxiliary member 5 is removed and then The lifting seat 23 is raised again. During this process, the measuring column 11 of the inside diameter micrometer 1 gradually penetrates into the plug-in hole 94, so that the measuring head 12 completes the measurement of the diameter of the plug-in hole 94 within the entire depth range, and the dial 13 displays the numerical difference between the plug-in hole 94 and the standard hole 52, so that the measurement personnel only need to observe whether the numerical difference is always within the theoretical tolerance to determine whether the aperture of the plug-in hole 94 meets the assembly requirements; in summary, the present invention fixes the inside diameter micrometer 1 on the stabilizing frame 2, and places the spindle body 91 to be measured on the lifting seat 23, so as to utilize the vertical lifting of the lifting seat 23 to complete the measurement of the inner diameter of the plug-in hole 94. Compared with the prior art, on the one hand, it avoids the influence of the measuring accuracy due to the shaking of the arm of the detection personnel, and on the other hand, it ensures the concentricity of the inside diameter micrometer 1 in the process of penetrating into the plug-in hole 94, thereby realizing the measurement of the entire depth range of the plug-in hole 94.

[0039] The lifting seat 23 is connected to the base 21 in the following manner: Figure 2 As shown, a sliding hole 25 is formed through the upper end surface of the base 21, and the lifting seat 23 is slidingly connected to the sliding hole 25, so that the lifting seat 23 achieves the technical requirement of being lifted and connected to the base 21 by cooperating with the sliding hole 25; the inner cavity of the base 21 is processed and formed with a wrapping edge 26 along the edge of the sliding hole 25, thereby increasing the connection between the base 21 and the lifting seat 23, and further improving the sliding stability of the lifting seat 23.

[0040] The specific structure of the lifting assembly is as follows: Figure 2 , Figure 3As shown, the lifting assembly includes an upper push block 27 slidably connected to the bottom surface of the inner cavity of the base 21, a control shaft 28 rotatably connected to the base 21, and a two-link assembly arranged between the control shaft 28 and the upper push block 27. The upper push block 27 has an arc-shaped height difference contact surface in a side view, and the height difference contact surface is supported on the bottom end of the lifting seat 23. The two-link assembly includes a first rod member 29 and a second rod member 30. One end of the first rod member 29 is fixed to the control shaft 28, and the other end is hinged to the second rod member 30. The other end of the second rod member 30 is hinged to the upper push block 27.

[0041] When it is necessary to control the lifting seat 23 to rise, the driving control shaft 28 rotates counterclockwise, thereby driving the active end of the first rod 29 to approach the upward push block 27, and after the force transmission of the second rod 30, the push block 27 is pushed to slide, and then the height difference contact surface generates an upward driving force on the lifting seat 23, and the upward thrust drives the lifting seat 23 to rise; when it is necessary to control the lifting seat 23 to fall, the driving control shaft 28 rotates clockwise, thereby driving the active end of the first rod 29 to move away from the push block 27, and after the force transmission of the second rod 30, the push block 27 is pulled to return to slide, and in this process, the lowest point of the height difference contact surface gradually approaches the bottom of the lifting seat 23, so that the lifting seat 23 falls due to the lack of bottom support; in summary, only the driving control shaft 28 needs to rotate in different directions to achieve the technical effect of controlling the lifting seat 23 to rise or fall by the lifting assembly, and achieve a technical effect of more convenient control.

[0042] In order to reduce the friction between the bottom end of the lifting seat 23 and the height difference contact surface, as Figure 2 As shown, the bottom end of the lifting seat 23 is rotatably connected to a roller 31, and the roller 31 abuts against the height difference contact surface, so that the roller 31 is used to replace the sliding friction between the bottom end of the lifting seat 23 and the height difference contact surface with a rolling friction with smaller friction, thereby effectively reducing the friction resistance between the lifting seat 23 and the upper push block 27. On the one hand, it effectively prevents the mutual wear between the two, and on the other hand, it achieves the technical effect of smoother lifting and lowering of the lifting seat 23.

[0043] In order to improve the stability of the connecting rod assembly to the thrust or pulling force of the upper push block 27, as Figure 3 As shown, the specific number of the two-link assembly is two, and the number of the two-link assembly is limited to two, thereby improving the balance of the thrust or pull applied to the push block 27; a first connecting cross bar 32 is provided between the midpoints of the two first rods 29, and a second connecting cross bar 33 is provided between the midpoints of the two second rods 30, thereby realizing the mutual connection between the two first rods 29 and the mutual connection between the two second rods 30, thereby improving the structural strength of the two connecting rod assemblies.

[0044] To facilitate the rotation of the drive control shaft 28, as Figure 2As shown, one end of the control shaft 28 extends out of the base 21 and is vertically fixed with a handle bar 34 , so that the handle bar 34 provides a force point for rotating the control shaft 28 , thereby providing convenience for the measurement personnel to rotate the control shaft 28 .

[0045] In actual measurement, it may be necessary to read a certain value on the dial 13 in detail. In order to avoid the value jumping due to abnormal sliding of the lifting seat 23 during reading, Figure 2 , Figure 3 As shown, the base 21 is threadedly equipped with a hand-tightening bolt 35, and the hand-tightening bolt 35 is in abutment with the upper push block 27; when it is necessary to read the value on the dial 13 in detail, the hand-tightening bolt 35 can be tightened, so as to utilize the friction between it and the upper push block 27 to limit the activity of the upper push block 27, thereby limiting the lifting and lowering of the lifting seat 23, and effectively avoiding the occurrence of value jumps when reading the value in detail.

[0046] The specific structure of the positioning component is as follows: Figure 2 , Figure 4 As shown, the positioning assembly includes a cross body 36 which is in the shape of a cross when viewed from above, and fan-shaped edges 37 which are integrally formed between the various angles of the cross body 36. The four ends of the cross body 36 are all hemispherical in design and are tangent to the inner circumferential surface of the shrink sleeve 92. Therefore, it is only necessary to ensure that the center line of the cross body 36 is in line with the center axis of the lifting seat 23 to ensure that the center axis of the main shaft body 91 is in line with the center axis of the lifting seat 23, thereby achieving the technical effect of the positioning assembly locating the sun gear input shaft to be measured; different models of sun gear input shafts may have different shrink sleeves 92. In order to adapt to shrink sleeves 92 with different inner diameters, the fan-shaped edges 37 are threaded with assembly bolts 38 screwed into the lifting seat 23. Therefore, after the assembly bolts 38 are screwed out, the positioning assembly can be replaced, thereby achieving the technical effect of adapting to shrink sleeves 92 with different inner diameters.

[0047] It should be noted that if Figure 4 As shown, the upper end surface of the lifting seat 23 is provided with four positioning protrusions 39 respectively embedded in the four angles of the cross body 36, so that when the positioning component is replaced, the four positioning protrusions 39 can realize the positioning of the cross body 36.

[0048] In actual use, it is found that since the lifting height of the lifting seat 23 is limited, in order to prevent the measuring column 11 from being unable to be fully inserted into the deeper insertion hole 94, such as Figure 2 , Figure 5As shown, the clamping member 24 is welded and fixed with a sliding sleeve 40 which is slidingly connected to the column 22. The sliding sleeve 40 has a clamping opening 41, and the sliding sleeve 40 is threadedly matched with a clamping bolt 42 which crosses the clamping opening 41; when it is necessary to adjust the height of the inside diameter micrometer 1, the clamping bolt 42 is loosened and the sliding sleeve 40 is longitudinally slid, so that the height position of the inside diameter micrometer 1 can be adjusted to adapt to the insertion holes 94 of different depths. When the adjustment is completed, the clamping bolt 42 is tightened to force the sliding sleeve 40 to shrink and clamp the column 22, thereby limiting the sliding activity of the sliding sleeve 40 along the length direction of the column 22, effectively preventing it from sliding abnormally.

[0049] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A bore measuring instrument for reducer parts, comprising an inner diameter micrometer (1), the inner diameter micrometer (1) comprising a measuring column (11), a measuring head (12) arranged at the bottom end of the measuring column (11), and a dial (13) arranged at the top end of the measuring column (11), characterized in that: The aperture measuring instrument further comprises a stabilizing frame (2) and a zero adjustment auxiliary component (5), wherein the stabilizing frame (2) comprises a base (21) with a hollow interior, a column (22) vertically fixed to the base (21), and a lifting seat (23) connected to the base (21) in a liftable manner, wherein the base (21) is provided with a control component for controlling the lifting and lowering of the lifting seat (23), the column (22) is provided with a clamping member (24) for clamping and fixing the measuring column (11), and the upper end surface of the lifting seat (23) is provided with a positioning component for positioning the spindle body (91); The aperture measuring instrument comprises a lifting assembly, the lifting assembly comprising an upper push block (27) slidably connected to the bottom surface of the inner cavity of the base (21), a control shaft (28) rotatably connected to the base (21), and a two-link assembly arranged between the control shaft (28) and the upper push block (27); the upper push block (27) has a height difference contact surface that is arc-shaped in side view, and the height difference contact surface abuts against the bottom end of the lifting seat (23); The bottom end of the lifting seat (23) is rotatably connected to a roller (31), and the roller (31) abuts against the height difference contact surface; The base (21) is threadedly engaged with a hand-tightening bolt (35), and the hand-tightening bolt (35) is abutted against the upper push block (27); The positioning assembly comprises a cross body (36) which is in the shape of a cross when viewed from above, and fan-shaped edges (37) respectively arranged between the angles of the cross body (36), the four ends of the cross body (36) are all hemispherical in design and are tangent to the inner circumferential surface of the shrink sleeve (92), and the fan-shaped edges (37) are threadedly matched with assembly bolts (38) screwed into the lifting seat (23); The upper end surface of the lifting seat (23) is provided with four positioning protrusions (39) respectively embedded in the four angles of the cross body (36).

2. The aperture measuring instrument for reducer parts according to claim 1, characterized in that: The base (21) is provided with a sliding hole (25) through the upper end surface, the lifting seat (23) is slidably connected to the sliding hole (25), and the inner cavity of the base (21) is provided with a wrapping edge (26) along the edge of the sliding hole (25).

3. The aperture measuring instrument for reducer parts according to claim 1, characterized in that: The two-link rod assembly comprises a first rod member (29) and a second rod member (30); one end of the first rod member (29) is fixed to the control shaft (28), and the other end is hinged to the second rod member (30); the other end of the second rod member (30) is hinged to the upper push block (27).

4. The aperture measuring instrument for reducer parts according to claim 3, characterized in that: The specific number of the two-link rod assembly is two, a first connecting cross bar (32) is provided between the midpoints of the two first rod members (29), and a second connecting cross bar (33) is provided between the midpoints of the two second rod members (30).

5. The aperture measuring instrument for reducer parts according to claim 3, characterized in that: One end of the control shaft (28) extends out of the base (21) and is vertically fixed with a handle bar (34).

6. The aperture measuring instrument for reducer parts according to claim 1, characterized in that: The clamping member (24) is provided with a sliding sleeve (40) which is slidably sleeved with the column (22); the sliding sleeve (40) has a clamping opening (41); and the sliding sleeve (40) is threadedly matched with a clamping bolt (42) which crosses the clamping opening (41).

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