CN105082005B - A kind of stationary fixture measuring distance over bar value - Google Patents

Abstract

The invention discloses a kind of stationary fixture measuring distance over bar value, this stationary fixture includes base, jacking block mechanism I, jacking block mechanism II, stud.Jacking block mechanism I and jacking block mechanism II are separately mounted on base, can planar slide along base, described jacking block mechanism I with jacking block mechanism II respectively with described stud two sections threaded, two sections of thread rotary orientations of described stud are contrary, the two ends of described stud are each passed through the axis hole of base both sides, and can be around base both sides axis hole center rotating, described stud is when the axis hole center rotating of base both sides, Liang Ge jacking block mechanism respectively by the screw thread at described stud two ends towards on the contrary or in opposite directions direction along the planar slide of described base, so that length bar clamping is used in the tested part calibration that Liang Ge jacking block mechanism is corresponding thereto.The stationary fixture measuring distance over bar value in the present invention, relative to the method for traditional fixing length bar, simple in construction, repeatable strong, stability is high.

Description

A Fixing Fixture for Measuring the Cross-bar Distance Value

technical field

The invention relates to the field of metrology, in particular to a fixing fixture for measuring span-rod distance values.

Background technique

The cross bar distance value is a measurement index reflecting the involute spline. The measurement accuracy is high, and it is widely used in production practice. For the measurement of the cross-rod distance, it is necessary to select two measuring rods with the same diameter and suitable size, put them into the two tooth grooves of the spline opposite diameter (for odd-numbered splines, stagger half the tooth pitch), and then use the universal Measuring instruments, such as micrometers, indicating micrometers, indicating calipers, length measuring instruments, three-coordinates, etc., can be used for measurement, and the measured distance between the two measuring rods is the cross-bar distance value.

However, there is no universal checking tool for measuring the cross rod distance. When the measuring rod and the measured part (alveolar) are in tangential line contact, it is very difficult to closely contact the measuring rod and the tooth alveolar. When measuring the cross-rod distance, there is no special fixture for fixing the measuring rod in China. In the past, the traditional method of fixing the measuring rod by hand or plasticine is due to the transient nature and instability of hand-holding. , which makes it difficult to find the best position for the measuring rod, which will cause the measuring rod to not be in the vertical plane, resulting in inaccurate distance across the rod; use plasticine to fix the two ends of the measuring rod, because the plasticine has Natural plasticity and elasticity, it is very easy to cause the plasticine to deform during measurement and eventually lead to a change in the position of the measuring rod, and the measuring rod and the measured object (alveolar) are not necessarily all tangent, there may be gaps, and the accuracy of the measurement data is not high , so it is difficult to obtain a relatively stable and accurate cross-rod distance value, so these measuring rod fixing methods have poor repeatability, are time-consuming, and the operation is cumbersome and inefficient, which directly affects the detection efficiency.

To sum up, it is particularly important to develop a simple structure, strong repeatability, and high stability fixture for measuring the cross-rod distance value.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a simple structure, strong repeatability, high stability of the fixed fixture used to measure the value of span rod.

In order to solve the technical problems in the background technology, the present invention provides a fixed fixture for measuring the bar span value, including a base, a jacking mechanism I, a jacking mechanism II, and a stud bolt. The stud bolt has two sections Threads in the opposite direction of rotation, the jacking mechanism I is connected with the thread of one direction of rotation of the stud bolt, and the jacking mechanism II is connected with the thread of the other direction of rotation of the stud bolt. The jacking mechanism I and the jacking mechanism II are respectively installed on the base, and can slide along the plane on the base, and the two ends of the stud bolts respectively pass through the shaft holes on both sides of the base, and can Rotate around the centers of the shaft holes on both sides of the base, so that the jacking mechanism I and the jacking mechanism II move oppositely or towards each other under the action of thread screwing.

Preferably, the jacking mechanism I includes a jacking I and a jacking I, the jacking I is installed on the jacking I, the jacking I is installed on the base, the jacking The block mechanism II includes a jacking block II and a jacking block II, the jacking block II is installed on the jacking block II, the jacking block II is installed on the base, and the stud bolts are respectively connected with the jacking block Support I and top block support II are threaded.

Further, both the top block I and the top block II have a radius circular groove structure and a avoidance structure for avoiding the measured part, and the radius circular groove structure is used to achieve close contact with the calibration rod of the measured part.

Optionally, there are fixed blocks at the bottom of the top block I and the top block II, and the top block support I and the top block support II have a plane for placing the measured part, and the plane has a The slot corresponding to the shape of the above-mentioned fixed block is used to fix the top block I and the top block II.

Preferably, the bottoms of the top block support I and the top block support II have sliding blocks, and guide rails are provided on the base, and the sliding blocks pass through the guide rails to limit the top block support I and the top block In the direction of movement of the support II, both the top block support I and the top block support II can slide along the guide rail through the sliding block.

Specifically, the bottoms of the top block support I and the top block support II both have a top block fixing block, the sliding block on the top block support I passes through the guide rail, and the lower end of the sliding block is fixed to the top block fixing block connected, the sliding block on the top block holder II passes through the guide rail, the lower end of the sliding block is fixedly connected with the top block fixing block, and the width of the top block fixing block is greater than the width of the guide rail.

Optionally, one end of the stud bolt is fixedly connected to the handle I, and the other end of the stud bolt is fixedly connected to the handle II, and the handle I and the handle II are used to conveniently turn the stud bolt to adjust the top The distance between block I and top block II.

Preferably, the fixing block is a rectangular structure, and the slot corresponding to the fixing block is a rectangular slot for fixing the top block I and the top block II.

Optionally, the fixing block at the bottom of the top block I and the top block II is a strong magnet, and the top block support I and the top block support II corresponding to the fixed block are ferromagnetic, and are used to fix the top block. Block I and Top Block II.

Further, the fixed block at the bottom of the top block I and the top block II is a ferromagnetic body, and the slot on the top block support I and the top block support II corresponding to the fixed block has a strong magnet for fixing the Describe top block I and top block II.

Adopt above-mentioned technical scheme, the present invention has following beneficial effect:

The invention provides a fixing fixture for measuring the cross-rod distance value. Compared with the traditional method of using human hands or plasticine to fix the measuring rod, the structure is simple, the repeatability is strong, and the stability is high. The fixing fixture only needs to Place the measured part on the supporting plane of the top block, select the top block corresponding to the calibration rod of the measured part, and turn the stud bolt to fix the calibration rod of the measured part.

The invention is mainly used for the measurement of internal and external gear parts, internal and external spline parts and various spline gauges. corresponding size). After repeated verifications, the measurement repeatability is good, the operation is convenient, and the parameterized automatic measurement can be realized on the ultra-high-precision three-coordinate, which greatly improves the measurement efficiency of the cross-rod distance value.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained based on these drawings without creative work.

Fig. 1 is the structural schematic diagram of a kind of fixed fixture that measures span rod distance value that the embodiment of the present invention provides;

Fig. 2 is a schematic structural view of a top block in a fixture for measuring the cross-rod distance value provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of the structure at the top block and the fixing block of a fixing fixture for measuring the cross rod distance value provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of a jacking block holder in a fixing fixture for measuring span distance values provided by an embodiment of the present invention.

Among them, the reference signs in the figure correspond to: 1-base, 2-jack mechanism I, 3-jack mechanism II, 4-stud bolt, 5-guide rail, 6-semicircular groove structure, 7-avoidance structure, 8 -fixed block, 9-sliding block, 10-top block fixing block, 11-handle Ⅰ, 12-handle Ⅱ, 13-card slot, 21-top block Ⅰ, 22-top block support Ⅰ, 31-top block Ⅱ, 32-top block holder II.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment one:

As shown in Figures 1-4, in order to solve the technical problems in the background technology, the present invention provides a fixed fixture for measuring the span distance value, including a base 1, a jacking mechanism I 2, a jacking mechanism II 3, a double Head bolt 4, the base 1 is the supporting part of the entire fixture, the plane on the base is the working surface, which has good flatness and wear resistance, and the size of the base determines the range of span distance of the measured part The purpose of using the stud bolt 4 at the same time is to realize the synchronous movement of the two jacking mechanisms, so as to prevent the single jacking mechanism from causing uneven stress on the tested part when the single jacking mechanism moves.

The stud bolt 4 has two sections of threads with opposite directions of rotation, the jacking mechanism I 2 is connected with the threads of one section of the stud bolt 4 in the direction of rotation, and the jacking mechanism II 3 is connected with the double-headed bolt 4. The other section of the bolt 4 is threaded and connected. The jacking mechanism I 2 and the jacking mechanism II 3 are respectively installed on the base 1 and can slide along the plane on the base 1. The stud bolts The two ends of 4 pass through the shaft holes on both sides of the base 1 respectively, and can rotate around the center of the shaft holes on both sides of the base 1, so that the jacking mechanism I 2 and the jacking mechanism II 3 are screwed together Move in the opposite direction or opposite direction.

Preferably, the jacking block mechanism I 2 includes a jacking block I 21 and a jacking block holder I 22, the jacking block I 21 is installed on the jacking block holder I 22, and the jacking block holder I 22 is installed on the On the base 1, the jacking block mechanism II 3 includes a jacking block II 31 and a jacking block II 32, the jacking block II 31 is mounted on the jacking block II 32, and the jacking block II 32 is installed on the jacking block II 32 On the base 1, the stud bolts 4 are threadedly matched with the top block holder I 22 and the top block holder II 32 respectively.

Further, both the top block I 21 and the top block II 31 have a radius circular groove structure 6 and an avoidance structure 7 for avoiding the measured part, and the radius circular groove structure 6 is used for calibrating the amount of the measured part The sticks are in close contact, and the top blocks with different types of radius circular groove structures can be made for the measuring rods of different diameters. The sides of the top block support I 22 and the top block support II 32 are designed as semicircular curved surfaces. This is for Increase the supporting area for placing the parts under test, and also reduce the weight of the top block holder.

Optionally, there are fixed blocks 8 at the bottom of the top block I 21 and the top block II 31, and the top block support I 22 and the top block support II 32 have planes for placing the parts under test, and the On the plane, there is a card slot 13 corresponding to the shape of the fixing block 8, which is used to fix the top block I 21 and the top block II 31, and the top block I 21 and the top block II 31 are respectively rotated around their respective vertical central axes. Rotate 180 degrees and re-place it in the corresponding slot 13, which can realize the alternate measurement of the internal and external cross-rod distance of the measured part. The placement method shown in Figure 1 can measure the inner span rod distance of the tested part.

Preferably, the bottoms of the top block support I 22 and the top block support II 32 both have sliding blocks 9, and the base 1 is provided with guide rails 5, and the sliding blocks 9 pass through the guide rails 5 to define the The moving direction of the jacking block support I 22 and the jacking block support II 32 , both the jacking block support I 22 and the jacking block support II 32 can slide along the guide rail 5 through the sliding block 9 .

Specifically, the bottoms of the top block support I 22 and the top block support II 32 have a top block fixing block 10, the sliding block 9 on the top block support I 22 passes through the guide rail 5, and the sliding block 9 The lower end is fixedly connected with the top block fixing block 10, the sliding block 9 on the top block support II 32 passes through the guide rail 5, the lower end of the sliding block 9 is fixedly connected with the top block fixing block 10, and the top block fixing block The width of 10 is greater than the width of the guide rail 5, and is used to fix the respective top block holders, so that the top block holders can slide better on the guide rail 5 on the base 1.

Optionally, one end of the stud bolt 4 is fixedly connected to the handle I 11, and the other end of the stud bolt 4 is fixedly connected to the handle II 12, and the handle I 11 and the handle II 12 are used to facilitate turning the double-ended Bolts 4 are used to adjust the distance between the top block I 21 and the top block II 31 and achieve the best contact with the measuring rod.

Preferably, the fixing block 8 is a rectangular structure, and the slot 13 corresponding to the fixing block 8 is a rectangular slot for fixing the top block I 21 and the top block II 31 .

Optionally, the fixed block 8 at the bottom of the top block I 21 and the top block II 31 is a strong magnet, and the top block support I 22 and the top block support II 32 corresponding to the fixed block 8 are ferromagnetic, Used to fix the top block I 21 and the top block II 31.

Correspondingly, a method for using a fixed fixture for measuring span bar distance value comprises the following steps:

S1. According to the requirements of the parts to be tested, select the measuring rod of the corresponding size and the matching top block;

S2. Place the measured part and the corresponding two measuring rods on the plane of the top block support;

S3. Cooperate the selected top block with the top block support, so that the semicircular groove structures on the two top blocks are respectively aligned with the corresponding measuring rods;

S4. Adjust the handle of the stud bolt, clamp the two measuring rods in the opposite tooth grooves of the measured part, and complete the fixing of the measuring rod used for the calibration of the measured part.

Adopt above-mentioned technical scheme, the present invention has following beneficial effect:

The invention provides a fixing fixture for measuring the cross-rod distance value. Compared with the traditional method of using human hands or plasticine to fix the measuring rod, the structure is simple, the repeatability is strong, and the stability is high. The fixing fixture only needs to Place the measured part on the supporting plane of the top block, select the top block corresponding to the calibration rod of the measured part, and turn the stud bolt to fix the calibration rod of the measured part.

The invention is mainly used for the measurement of internal and external gear parts, internal and external spline parts and various spline gauges. corresponding size). After repeated verifications, the measurement repeatability is good, the operation is convenient, and the parameterized automatic measurement can be realized on the ultra-high-precision three-coordinate, which greatly improves the measurement efficiency of the cross-rod distance value.

Embodiment two:

As shown in Figures 1-4, in order to solve the technical problems in the background technology, the present invention provides a fixed fixture for measuring the span distance value, including a base 1, a jacking mechanism I 2, a jacking mechanism II 3, a double Head bolt 4, the base 1 is the supporting part of the entire fixture, the plane on the base is the working surface, which has good flatness and wear resistance, and the size of the base determines the range of span distance of the measured part The purpose of using the stud bolt 4 at the same time is to realize the synchronous movement of the two jacking mechanisms, so as to prevent the single jacking mechanism from causing uneven stress on the tested part when the single jacking mechanism moves.

The stud bolt 4 has two sections of threads with opposite directions of rotation, the jacking mechanism I 2 is connected with the threads of one section of the stud bolt 4 in the direction of rotation, and the jacking mechanism II 3 is connected with the double-headed bolt 4. The other section of the bolt 4 is threaded and connected. The jacking mechanism I 2 and the jacking mechanism II 3 are respectively installed on the base 1 and can slide along the plane on the base 1. The stud bolts The two ends of 4 pass through the shaft holes on both sides of the base 1 respectively, and can rotate around the center of the shaft holes on both sides of the base 1, so that the jacking mechanism I 2 and the jacking mechanism II 3 are screwed together Move in the opposite direction or opposite direction.

Preferably, the jacking block mechanism I 2 includes a jacking block I 21 and a jacking block holder I 22, the jacking block I 21 is installed on the jacking block holder I 22, and the jacking block holder I 22 is installed on the On the base 1, the jacking block mechanism II 3 includes a jacking block II 31 and a jacking block II 32, the jacking block II 31 is mounted on the jacking block II 32, and the jacking block II 32 is installed on the jacking block II 32 On the base 1, the stud bolts 4 are threadedly matched with the top block holder I 22 and the top block holder II 32 respectively.

Further, both the top block I 21 and the top block II 31 have a radius circular groove structure 6 and an avoidance structure 7 for avoiding the measured part, and the radius circular groove structure 6 is used for calibrating the amount of the measured part The sticks are in close contact, and the top blocks with different types of radius circular groove structures can be made for the measuring rods of different diameters. The sides of the top block support I 22 and the top block support II 32 are designed as semicircular curved surfaces. This is for Increase the supporting area for placing the parts under test, and also reduce the weight of the top block holder.

Optionally, there are fixed blocks 8 at the bottom of the top block I 21 and the top block II 31, and the top block support I 22 and the top block support II 32 have planes for placing the parts under test, and the On the plane, there is a card slot 13 corresponding to the shape of the fixed block 8, which is used to fix the top block I 21 and the top block II 31, and the top block I 21 and the top block II 31 are respectively wound around their respective vertical central axes Rotate 180 degrees and re-place it in the corresponding slot 13, which can realize the alternate measurement of the internal and external cross-rod distance of the measured part. The placement method shown in Figure 1 can measure the inner span rod distance of the tested part.

Preferably, the bottoms of the top block support I 22 and the top block support II 32 both have sliding blocks 9, and the base 1 is provided with guide rails 5, and the sliding blocks 9 pass through the guide rails 5 to define the The moving direction of the jacking block support I 22 and the jacking block support II 32 , both the jacking block support I 22 and the jacking block support II 32 can slide along the guide rail 5 through the sliding block 9 .

Specifically, the bottoms of the top block support I 22 and the top block support II 32 have a top block fixing block 10, the sliding block 9 on the top block support I 22 passes through the guide rail 5, and the sliding block 9 The lower end is fixedly connected with the top block fixing block 10, the sliding block 9 on the top block support II 32 passes through the guide rail 5, the lower end of the sliding block 9 is fixedly connected with the top block fixing block 10, and the top block fixing block The width of 10 is greater than the width of the guide rail 5, and is used to fix the respective top block holders, so that the top block holders can slide better on the guide rail 5 on the base 1.

Optionally, one end of the stud bolt 4 is fixedly connected to the handle I 11, and the other end of the stud bolt 4 is fixedly connected to the handle II 12, and the handle I 11 and the handle II 12 are used to facilitate turning the double-ended Bolts 4 are used to adjust the distance between the top block I 21 and the top block II 31 and achieve the best contact with the measuring rod.

Preferably, the fixing block 8 is a rectangular structure, and the slot 13 corresponding to the fixing block 8 is a rectangular slot for fixing the top block I 21 and the top block II 31 .

Further, the fixing block 8 at the bottom of the top block I 21 and the top block II 31 is a ferromagnetic body, and the slot 13 on the top block support I 22 and the top block support II 32 corresponding to the fixed block 8 has a A strong magnet is used to fix the top block I 21 and the top block II 31.

Correspondingly, a method for using a fixed fixture for measuring span bar distance value comprises the following steps:

S1. According to the requirements of the parts to be tested, select the measuring rod of the corresponding size and the matching top block;

S2. Place the measured part and the corresponding two measuring rods on the plane of the top block support;

S3. Cooperate the selected top block with the top block support, so that the semicircular groove structures on the two top blocks are respectively aligned with the corresponding measuring rods;

S4. Adjust the handle of the stud bolt, clamp the two measuring rods in the opposite tooth grooves of the measured part, and complete the fixing of the measuring rod used for the calibration of the measured part.

Adopt above-mentioned technical scheme, the present invention has following beneficial effect:

The invention provides a fixing fixture for measuring the cross-rod distance value. Compared with the traditional method of using human hands or plasticine to fix the measuring rod, the structure is simple, the repeatability is strong, and the stability is high. The fixing fixture only needs to Place the measured part on the supporting plane of the top block, select the top block corresponding to the calibration rod of the measured part, and turn the stud bolt to fix the calibration rod of the measured part.

The invention is mainly used for the measurement of internal and external gear parts, internal and external spline parts and various spline gauges. corresponding size). After repeated verifications, the measurement repeatability is good, the operation is convenient, and the parameterized automatic measurement can be realized on the ultra-high-precision three-coordinate, which greatly improves the measurement efficiency of the cross-rod distance value.

The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (8)

1. the stationary fixture measuring distance over bar value, it is characterised in that: include base (1), jacking block machine Structure I (2), jacking block mechanism II (3), stud (4),

Described stud (4) has two sections of oppositely oriented screw threads, described jacking block mechanism I (2) and institute The threaded engagement stating stud (4) wherein one section of rotation direction connects, and described jacking block mechanism II (3) is with described The threaded engagement of stud (4) another section of rotation direction connects, described jacking block mechanism I (2) and jacking block mechanism II (3) is separately mounted on described base (1), and can planar slide along described base (1),

The two ends of described stud (4) are each passed through the axis hole of described base (1) both sides, and can be around Described base (1) both sides axis hole center rotating, makes described jacking block mechanism I (2) and jacking block mechanism II (3) Move on the contrary under threaded engagement effect or move towards,

Described jacking block mechanism I (2) includes jacking block I (21), jacking block torr I (22), described jacking block I (21) Being arranged in described jacking block torr I (22), described jacking block torr I (22) is arranged on described base (1), Described jacking block mechanism II (3) includes jacking block II (31), jacking block torr II (32), described jacking block II (31) Being arranged in described jacking block torr II (32), described jacking block torr II (32) is arranged on described base (1), Described stud (4) respectively with jacking block torr I (22) and jacking block torr II (32) threaded engagement,

Described jacking block I (21) all has fixed block (8), described jacking block torr I (22) with jacking block II (31) bottom Be respectively provided with the plane for placing tested part in jacking block torr II (32), and have in described plane and institute State the draw-in groove (13) that fixed block (8) shape is corresponding, be used for fixing jacking block I (21) and jacking block II (31).

A kind of stationary fixture measuring distance over bar value the most according to claim 1, it is characterised in that institute State jacking block I (21) and jacking block II (31) be respectively provided with radius circular groove structure (6) be used for dodging described tested The avoiding structure (7) of part, described radius circular groove structure (6) is for real with tested part calibration length bar Now it is in close contact.

A kind of stationary fixture measuring distance over bar value the most according to claim 1, it is characterised in that institute The bottom stating jacking block torr I (22) and jacking block torr II (32) is respectively provided with sliding shoe (9), and described base (1) On be provided with guide rail (5), described sliding shoe (9) pass described guide rail (5), limit described jacking block torr I (22) with the direction of motion of jacking block torr II (32), described jacking block torr I (22) and jacking block torr II (32) All can be slided along described guide rail (5) by described sliding shoe (9).

A kind of stationary fixture measuring distance over bar value the most according to claim 3, it is characterised in that institute The bottom stating jacking block torr I (22) and jacking block torr II (32) is respectively provided with jacking block fixed block (10), described top Sliding shoe (9) in block torr I (22) passes described guide rail (5), described sliding shoe (9) lower end and top Block fixed block (10) is fixing to be connected, and the sliding shoe (9) in described jacking block torr II (32) passes described guide rail (5), described sliding shoe (9) lower end is fixing with jacking block fixed block (10) to be connected, described jacking block fixed block (10) width is more than the width of described guide rail (5).

5. according to a kind of stationary fixture measuring distance over bar value described in claim 3 or 4, it is characterised in that Described stud (4) one end is fixing with handle I (11) to be connected, described stud (4) other end Fixing with handle II (12) and be connected, described handle I (11) rotates institute with handle II (12) for convenient State stud (4) to adjust the distance of described jacking block I (21) and jacking block II (31).

A kind of stationary fixture measuring distance over bar value the most according to claim 5, it is characterised in that institute Stating fixed block (8) is a rectangular configuration, and the described draw-in groove (13) corresponding with described fixed block (8) is One rectangular channel, is used for fixing described jacking block I (21) and jacking block II (31).

A kind of stationary fixture measuring distance over bar value the most according to claim 6, it is characterised in that institute The fixed block (8) stating jacking block I (21) and jacking block II (31) bottom is a strong magnet, with described fixed block (8) corresponding jacking block torr I (22) is ferromagnet with jacking block torr II (32), is used for fixing described top Block I (21) and jacking block II (31).

A kind of stationary fixture measuring distance over bar value the most according to claim 6, it is characterised in that institute The fixed block (8) stating jacking block I (21) and jacking block II (31) bottom is a ferromagnet, with described fixed block (8) draw-in groove (13) in corresponding jacking block torr I (22) and jacking block torr II (32) has a strong magnet, For fixing described jacking block I (21) and jacking block II (31).