CN116858061A - Cotter pin length quick measuring device and using method thereof - Google Patents

Abstract

The invention belongs to the technical field of cotter pin installation, and particularly relates to a cotter pin length quick measuring device and a using method thereof. The device mainly comprises a base, a sliding block and a locking knob, and the length of the cotter pin is rapidly measured and calibrated through the base provided with the scale marks and the sliding block which is slidably arranged on the base, so that the device can be applied to rapid measurement or rapid trimming of the length of the cotter pin; the efficiency and the precision of cotter pin length measurement and length trimming are greatly improved.

Description

Cotter pin length quick measuring device and using method thereof

Technical Field

The invention belongs to the technical field of cotter pin installation, and particularly relates to a cotter pin length quick measuring device and a using method thereof.

Background

The cotter pin is a metal hardware, commonly known as a spring pin and a safety pin, and is also a mechanical part, and is mainly used for preventing loose in threaded connection. The cotter pin can be used for determining the required adapting length of the cotter pin according to the specific specifications of the fasteners such as nuts, pins and the like which are required to be fastened, and trimming is carried out. Because of the degree of fit, cotter pins are often longer in their intended length when used with fasteners of different gauges.

However, in the field of aviation, aerospace equipment and the like with high reliability requirements, the length of the cotter pin needs to meet the rewinding requirement during high reliability installation, and the length of the cotter pin just meets the requirement of rewinding the cotter pin to the inner side of the nut and ensures the fitting of the nut. The longer the cotter pin length can lead to the cotter pin can't laminate the nut, and the short the cotter pin length is the unable inner roll to the nut inboard and scrap the cotter pin, can't play locking insurance's effect. Therefore, basically, the cotter pin length needs to be adjusted according to the specification of the fastened nut before the cotter pin is used, and the more accurate the cotter pin length is, the higher the matching degree with the nut is, and the better the anti-loosening effect is.

The traditional method for adjusting the length of the cotter pin is to measure the length required by the cotter pin by using a steel plate ruler, mark the measured length by using a marker pen on the cotter pin, and then cut by using a diagonal pliers type cutting tool. The length of the mark is easy to change in the motion conversion process, so that the trimming precision of the cotter pin is not high; and the required other auxiliary tools are more, the operation steps are more and the efficiency is low.

Disclosure of Invention

Aiming at the current situations that the trimming efficiency of the cotter pin length is low and the precision is low in the prior art, the invention provides a cotter pin length rapid measuring device and a using method thereof, and the cotter pin length is rapidly measured and calibrated through a base provided with scale marks and a sliding block which is slidably arranged on the base, so that the cotter pin length rapid measuring device can be applied to rapid measurement or rapid trimming of the cotter pin length; the efficiency and the precision of cotter pin length measurement and length trimming are greatly improved.

The invention has the following specific implementation contents:

1. the invention provides a cotter pin length rapid measuring device.

A cotter pin length quick measuring device comprises a base, a sliding block and a locking knob;

the base is provided with a working groove for placing the cotter pin, the head end of the working groove is provided with a pin body limiting through hole which can be used for the pin body of the cotter pin to penetrate and limit the pin body of the cotter pin, and the notch of the working groove is provided with a scale mark for directly acquiring the reserved length of the cotter pin during trimming; the setting direction of the scale marks is the same as the axial direction of the pin body limiting through holes;

the sliding block is slidably arranged in the working groove of the base along the arrangement direction of the scale marks, and a pin head limiting through hole which can be used for the pin body of the cotter pin to penetrate and limit the pin head of the cotter pin is arranged on the sliding block; the pin body limiting through holes and the pin head limiting through holes which correspond to each other in position are used as a group of mutually matched limiting hole structures and are used for jointly installing the same cotter pin;

the locking knob is arranged on the sliding block; when the locking knob is screwed, the sliding block is fastened with the base, and at the moment, the sliding block cannot slide; when the locking knob is unscrewed, the sliding block is unscrewed from the base, and at the moment, the sliding block can slide along the working groove.

Further, in order to better illustrate the invention, the working groove is provided with a linear chute for limiting and mounting the sliding block; the sliding block is provided with a limit convex part which is in sliding fit with the linear sliding groove.

Further, in order to better explain the invention, the notch of the working groove is provided as a slope which is designed to be inclined downwards.

Further, to better illustrate the invention, the slider is of unitary construction; the sliding block is divided into a pin head limiting part and a pin head connecting part, wherein the pin head limiting part is close to the pin body limiting through hole, and the pin head connecting part is far away from the pin body limiting through hole; the pin head limiting through hole is arranged at the pin head limiting part, and the pin head connecting part is provided with an opening part; the hole diameter of one end of the pin head limiting through hole close to the opening part is large, and the hole diameter of the other end of the pin head limiting through hole far away from the opening part is small; the pin head limiting through hole can allow the pin body of the cotter pin to penetrate through, and one end of the pin head limiting through hole with a small aperture can limit the pin head of the cotter pin so that the pin head of the cotter pin cannot penetrate through the pin head; when trimming the cotter pin, the pin body of the cotter pin penetrates from the end with the large aperture of the pin head limiting through hole, penetrates from the end with the small aperture of the pin head limiting through hole, and then penetrates through the pin body limiting through hole; the part of the cotter pin, which extends out of the pin limiting through hole, is the part to be trimmed.

Further, in order to better illustrate the invention, the slider is provided with a positioning buckle for mounting the locking knob; the positioning buckle is lapped on the notch of the working groove.

Further, in order to better explain the present invention, the opening portion has a through-slot structure penetrating up and down.

Further, in order to better explain the invention, the upper part and/or the lower part of the opening part is/are provided with a transverse connection part for improving the transverse working strength of the sliding block.

Further, in order to better illustrate the invention, the sliding block is of a combined structure; the sliding block consists of a pin head connecting block and a pin head limiting block which are detachably connected, and the pin head connecting block is closer to the pin body limiting through hole relative to the pin head limiting block; the pin head limiting through hole is arranged on the pin head limiting block, and the end face of the pin head connecting block, facing the pin head limiting block, is used as a pin head limiting surface and used for abutting against the end part of the cotter pin head to position; the hole diameter of one end of the pin head limiting through hole close to the pin head limiting surface is large, and the hole diameter of the other end of the pin head limiting through hole far from the pin head limiting surface is small; the pin head limiting through hole can allow the pin body of the cotter pin to penetrate through, and one end of the pin head limiting through hole with a small aperture can limit the pin head of the cotter pin so that the pin head of the cotter pin cannot penetrate through the pin head; when trimming the cotter pin, the pin body of the cotter pin penetrates from the end with the large aperture of the pin head limiting through hole, penetrates from the end with the small aperture of the pin head limiting through hole, and then penetrates through the pin body limiting through hole; the part of the cotter pin, which extends out of the pin limiting through hole, is the part to be trimmed.

Further, in order to better explain the invention, the pin head connecting block and the pin head limiting block are detachably connected through a concave-convex combined structure or a magnetic attraction mode.

Further, in order to better illustrate the invention, the pin head connecting block is also provided with a magnetic block mounting groove; and the magnet is detachably arranged in the magnet mounting groove and used for providing magnetic attraction for the cotter pin which can be magnetically attracted.

Further, to better illustrate the invention, the pin head connection block is made of ferromagnetic material and magnetized for providing magnetic attraction to the cotter pin that can be magnetically attracted.

Further, in order to better explain the invention, the cotter length quick measuring device further comprises a tail anti-falling piece detachably mounted at the tail of the base, and the tail anti-falling piece is used for preventing the sliding block from being separated abnormally.

2. The invention provides a using method of a cotter pin length rapid measuring device, namely a cotter pin length rapid measuring method.

The cotter length quick measuring method is a specific application of the device, and specifically refers to the adoption of the cotter length quick measuring device for measuring the length of the cotter.

The method for rapidly determining the length of the cotter pin specifically comprises the following steps: firstly, moving the sliding block which is not fastened with the base to a position capable of placing a cotter pin to be trimmed in a working groove of the base; then, sequentially penetrating the pin body of the cotter pin through the pin head limiting through hole and the pin body limiting through hole and then penetrating out of the whole base, and installing the pin head of the cotter pin at the pin head limiting through hole of the sliding block in a limiting manner; the sliding block is moved along the scale line, and the sliding block is utilized to drive the cotter pin to be trimmed to move until the tail end of the cotter pin body, which is far away from the pin body, is just flush with the outer end surface of the pin body limiting through hole; and finally, reading the scale value corresponding to the scale mark at the scale indication end of the sliding block at the moment, and taking the scale value as the length value of the cotter pin.

3. The invention provides a using method of a cotter pin length quick measuring device, namely a cotter pin length quick trimming method.

The cotter length quick determination method is a specific application of the device, and specifically refers to that the cotter length quick determination device is used for quickly trimming the length of the cotter according to the required adaptation length of the cotter.

The cotter pin length quick trimming method specifically comprises the following steps: firstly, moving the sliding block which is not fastened with the base to a position capable of placing a cotter pin to be trimmed in a working groove of the base; then, sequentially penetrating the pin body of the cotter pin through the pin head limiting through hole and the pin body limiting through hole and then penetrating out of the whole base, and installing the pin head of the cotter pin at the pin head limiting through hole of the sliding block in a limiting manner; the sliding block is moved along the scale line, the sliding block is utilized to drive the cotter pin to be trimmed to move to the scale line corresponding to the required adapting length of the cotter pin, and at the moment, the part of the cotter pin body extending out of the pin body limiting through hole is the part to be trimmed; then, screwing the locking knob so that the sliding block is locked on the base, namely fixing the cotter pin; finally, cutting off the pin body from the outer end surface of the pin body limiting through hole by using a cutting tool or a shearing tool in a flush way, and obtaining the cotter pin with the length of the required adaptation length.

4. The invention also provides a using method of the cotter pin length rapid measuring device, which mainly uses the fixing function of the cotter pin length rapid measuring device as an auxiliary tool for cutting the cotter pin. At this time, the problem of the length of the cotter pin may not be considered.

The invention has the following beneficial effects:

(1) The quick measuring device for the length of the cotter pin is a quick adjusting device which is small in size, simple in structure, convenient to operate and easy to carry.

(2) The cotter pin length quick measuring device can be used for quickly measuring the length of cotter pins, and can realize the length measurement of cotter pins in one step without external auxiliary means.

(3) According to the cotter pin length quick trimming method, the cotter pin length quick trimming device which is designed independently is adopted to trim the cotter pin quickly, so that the length of the cotter pin can be completely rolled into a nut groove without surplus length and is attached to the shape of the nut. Compared with the traditional method for manually adjusting the length of the cotter pin, the cotter pin length quick measuring device can finish the measuring length and positioning of the cotter pin in one step, has simple and convenient use process and ensures high shearing precision.

(4) The quick cotter pin length measuring device can be used as an auxiliary tool for cutting the cotter pin length, and the unstable condition of directly pinching the cotter pin by hands is avoided.

Drawings

FIG. 1 is a schematic perspective view of a cotter length quick measuring apparatus according to the present invention.

FIG. 2 is a schematic view showing a structure of a cotter pin length quick measuring apparatus according to the present invention in a depression direction.

FIG. 3 is a schematic view showing the use of a cotter pin installed in the cotter pin length quick measuring apparatus of the present invention.

Fig. 4 is a schematic view of a left-hand structure of the base of the present invention.

Fig. 5 is a schematic view showing a depression structure of the slider described in embodiment 1.

Fig. 6 is a schematic view of the structure of the slider in the left direction in embodiment 1.

Fig. 7 is a schematic structural view of a slider of a monolithic structure in embodiment 2.

Fig. 8 is a schematic view showing the use state of the slider of the one-piece structure in embodiment 2.

Fig. 9 is a schematic structural view of a slider of a monolithic structure in embodiment 3.

Fig. 10 is a schematic view showing the use state of the slider of the monolithic structure in embodiment 3.

Fig. 11 is a schematic structural view of a slider of a combined structure in embodiment 4.

Fig. 12 is a schematic structural view of the pin head connection portion in embodiment 4.

Fig. 13 is a schematic view of the structure of the pin head stopper in embodiment 4.

Fig. 14 is a schematic view showing the mounting structure of the slider and the magnet in the combined structure in embodiment 4.

Fig. 15 is a schematic view showing the use state of the slider of the combined structure in embodiment 4.

Fig. 16 is a schematic view of the cotter fitting length when connected with a nut.

Wherein, K is cotter pin;

1. a base; 101. a working groove; 102. a pin body limiting through hole; 103. a linear chute; 104. scale marks; 105. an inclined plane; 2. a slide block; 201. pin head limiting through hole; 202. positioning buckle; 203. an opening portion; 204. a pin head limiting surface; 205. a magnetic block mounting groove; 206. a limit protrusion; 2A, pin head connecting parts; 2B, a pin head limiting part; 21. a pin head connection; 22. a pin head limiting part; 3. a locking knob; 4. a magnet; 5. and the tail part is an anti-falling piece.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments, and therefore should not be considered as limiting the scope of protection. All other embodiments, which are obtained by a worker of ordinary skill in the art without creative efforts, are within the protection scope of the present invention based on the embodiments of the present invention.

Example 1:

in order to solve the technical problem of quick measurement of the length of the cotter pin, the embodiment provides a quick measurement device for the length of the cotter pin, which is specifically described as follows.

As shown in fig. 1 and 2, a cotter pin length quick measuring device comprises a base 1, a sliding block 2 and a locking knob 3.

As shown in fig. 3, the base 1 is provided with a working groove 101 for placing a cotter pin K, a pin body limiting through hole 102 capable of allowing the pin body of the cotter pin K to penetrate and limiting the pin body of the cotter pin K is provided at the head end of the working groove 101, and a scale line 104 for directly obtaining the reserved length of the cotter pin K during trimming is provided at the notch of the working groove 101; the setting direction of the scale lines 104 is the same as the axial direction of the pin body limiting through holes 102.

As shown in fig. 3, the slider 2 is slidably mounted in the working groove 101 of the base 1 along the arrangement direction of the graduation marks 104. As shown in fig. 3 and 5, the slider 2 is provided with a pin head limiting through hole 201 through which the pin body of the cotter pin K passes and which limits the pin head of the cotter pin K; the pin body limiting through holes 102 and the pin head limiting through holes 201 which correspond to each other in position are used as a group of mutually matched limiting hole structures for jointly installing the same cotter pin K.

As shown in fig. 1, the locking knob 3 is mounted on the slider 2; when the locking knob 3 is screwed, the sliding block 2 is fastened with the base 1, and at the moment, the sliding block 2 cannot slide; when the locking knob 3 is unscrewed, the slider 2 is released from the base 1, and at this time, the slider 2 can slide along the working groove 101.

In another embodiment, as shown in fig. 4, the working groove 101 is provided with a linear chute 103 for limiting and installing the sliding block 2; as shown in fig. 6, the slider 2 is provided with a limit protrusion 206 slidably engaged with the linear chute 103.

In another embodiment, as shown in fig. 3, the notch of the working groove 101 is configured as a slope 105 of downward sloping design.

In another embodiment, as shown in fig. 1, the cotter length quick measuring apparatus further includes a tail anti-falling member 5 detachably installed at the tail of the base 1, for preventing the sliding block 2 from being abnormally separated.

Example 2:

the present embodiment provides a slider 2 of a single body structure on the basis of embodiment 1.

In this embodiment, the slider 2 is of a single-body structure; the sliding block 2 is divided into a pin head limiting part 2B and a pin head connecting part 2A, wherein the pin head limiting part 2B is close to the pin body limiting through hole 102, and the pin head connecting part 2A is far away from the pin body limiting through hole 102.

The pin head limiting through hole 201 is arranged at the pin head limiting part 2B, and the pin head connecting part 2A is provided with an opening part 203; the pin head limiting through hole 201 has a large aperture at one end close to the opening 203 and a small aperture at the other end far from the opening 203; the pin head limiting through hole 201 can allow the pin body of the cotter pin K to penetrate, and the end of the pin head limiting through hole 201 with a small aperture can limit the pin head of the cotter pin K so that the pin head of the cotter pin K cannot penetrate; when trimming the cotter pin K, the pin body of the cotter pin K penetrates from the end with the large aperture of the pin head limiting through hole 201, penetrates from the end with the small aperture of the pin head limiting through hole 201, and then penetrates through the pin body limiting through hole 102; the part of the cotter pin K, from which the pin body extends out of the pin body limiting through hole 102, is the part to be trimmed.

In this embodiment, as shown in fig. 7 and 8, the opening 203 has a through-slot structure penetrating vertically.

In another embodiment, as shown in fig. 3, the slider 2 is provided with a positioning buckle 202 for mounting the locking knob 3; the positioning buckle 202 is overlapped with the notch of the working groove 101.

Other portions of this embodiment are the same as those of embodiment 1, and thus will not be described in detail.

Example 3:

the present embodiment provides a slider 2 of another monolithic structure on the basis of embodiment 1 and embodiment 2.

In this embodiment, the slider 2 is of a unitary structure. The sliding block 2 is divided into a pin head limiting part 2B and a pin head connecting part 2A, wherein the pin head limiting part 2B is close to the pin body limiting through hole 102, and the pin head connecting part 2A is far away from the pin body limiting through hole 102.

The pin head limiting through hole 201 is arranged at the pin head limiting part 2B, and the pin head connecting part 2A is provided with an opening part 203; the pin head limiting through hole 201 has a large aperture at one end close to the opening 203 and a small aperture at the other end far from the opening 203; the pin head limiting through hole 201 can allow the pin body of the cotter pin K to penetrate, and the end of the pin head limiting through hole 201 with a small aperture can limit the pin head of the cotter pin K so that the pin head of the cotter pin K cannot penetrate; when trimming the cotter pin K, the pin body of the cotter pin K penetrates from the end with the large aperture of the pin head limiting through hole 201, penetrates from the end with the small aperture of the pin head limiting through hole 201, and then penetrates through the pin body limiting through hole 102; the part of the cotter pin K, from which the pin body extends out of the pin body limiting through hole 102, is the part to be trimmed.

In this embodiment, a cross-connecting portion that improves the transverse operation strength of the slider 2 is provided at the upper portion and/or the lower portion of the opening portion 203. As shown in fig. 9 and 10, the slider 2 has a cross-connecting portion provided at an upper portion of the opening 203, so that the strength of the slider 2 can be enhanced.

In another embodiment, as shown in fig. 3, the slider 2 is provided with a positioning buckle 202 for mounting the locking knob 3; the positioning buckle 202 is overlapped with the notch of the working groove 101.

In both the embodiment 3 and the embodiment 2, the slider 2 is of a single structure, and in order to ensure that the pin body of the cotter pin K can penetrate the slider 2 and that the pin head of the cotter pin K is limited and cannot penetrate, it is required that the cotter pin K is inserted into the slider 2 from the side of the slider 2 toward the device tail end, and therefore, the slider 2 is provided with an opening 203 for unidirectional insertion of the cotter pin K.

Further, the main difference between the slider 2 of this embodiment 3 and embodiment 2 is the structure of the opening 203. In embodiment 2, the opening 203 is vertically penetrated and has no stopper. In embodiment 3, a stopper is provided at the upper or lower part of the opening 203, so that the strength of the slider 2 is enhanced without affecting the insertion of the cotter pin K, the deformation of the component is reduced, and the service life of the component is prolonged. The blocking piece is a transverse connection part.

Other portions of this embodiment are the same as those of embodiment 1 and embodiment 2, and thus will not be described in detail.

Example 4:

in this embodiment, the structure of the slider 2 is optimally designed based on embodiment 1.

In this embodiment, as shown in fig. 11 and 15, the slider 2 has a combined structure. The sliding block 2 is composed of a pin head connecting block 21 and a pin head limiting block 22 which are detachably connected, and the pin head connecting block 21 is closer to the pin body limiting through hole 102 relative to the pin head limiting block 22.

As shown in fig. 13, the pin head limiting through hole 201 is disposed on the pin head limiting block 22; as shown in fig. 12, the end face of the pin head connecting block 21 facing the pin head stopper 22 is used as a pin head stopper face 204 for abutting against the end of the pin head of the cotter pin K to perform positioning. The hole diameter of one end of the pin head limiting through hole 201, which is close to the pin head limiting surface 204, is large, and the hole diameter of the other end of the pin head limiting through hole, which is far away from the pin head limiting surface 204, is small; the pin head limiting through hole 201 can allow the pin body of the cotter pin K to penetrate, and the end of the pin head limiting through hole 201 with a small aperture can limit the pin head of the cotter pin K so that the pin head of the cotter pin K cannot penetrate; when trimming the cotter pin K, the pin body of the cotter pin K penetrates from the end with the large aperture of the pin head limiting through hole 201, penetrates from the end with the small aperture of the pin head limiting through hole 201, and then penetrates through the pin body limiting through hole 102; the part of the cotter pin K, from which the pin body extends out of the pin body limiting through hole 102, is the part to be trimmed.

In this embodiment, the pin head connecting block 21 and the pin head limiting block 22 are detachably connected by a concave-convex combination structure or a magnetic attraction mode. When the pin head connecting block 21 and the pin head limiting block 22 are connected by adopting a magnetic attraction mode, the pin head connecting block 21 is made of ferromagnetic materials and is magnetized, and the pin head connecting block is used for providing magnetic attraction for the cotter pin K which can be magnetically attracted.

In another embodiment, for the cotter pin K made of ferromagnetic material, the fixing force of the cotter pin K in measuring the length or trimming the length can be enhanced by magnetic attraction. The present embodiment provides two ways of achieving that the cotter pin K can magnetically attract the pin head connecting block 21 of the slider 2. In one implementation, the pin head connecting block 21 is made of ferromagnetic material and magnetized, and the pin head connecting block 21 itself can directly provide magnetic force. In another implementation manner, as shown in fig. 12 and 14, a magnetic block mounting groove 205 is provided on the pin head connecting block 21, a magnet 4 is detachably mounted in the magnetic block mounting groove 205, and a magnetic force generated by the magnet 4 is used to attract the cotter pin K. When the cotter pin K is installed in two implementations, the end part of the cotter pin K will automatically adsorb on the end surface of the pin head connecting block 21, and the end surface is marked as a pin head limiting surface 204.

In another embodiment, as shown in fig. 3, the slider 2 is provided with a positioning buckle 202 for mounting the locking knob 3; the positioning buckle 202 is overlapped with the notch of the working groove 101.

In embodiment 4, a slider 2 having a combined structure is provided as compared with embodiments 2 and 3. In this solution the slider 2 can be disassembled into two separate parts: a pin head connecting block 21 and a pin head limiting block 22. Since the pin head stopper 22 can pass through the pin body of the cotter pin K and restrict the pin head of the cotter pin K, the pin head connecting block 21 does not need to be provided with the opening 203. In this embodiment, the end of the cotter pin K is brought into contact with the end surface of the pin head connecting block 21 by using the end surface of the pin head connecting block 21 as a reference surface, thereby performing uniform positioning and improving the accuracy of length measurement. The end face of the slider 2 for limiting the end of the pin head of the cotter pin K is the pin head limiting face 204. Further, a magnetic attraction mode is adopted to keep the pin head of the cotter pin K and the sliding block 2 from being in flexible connection with displacement.

Other portions of this embodiment are the same as those of embodiment 1, and thus will not be described in detail.

Example 5:

in this example, the structure of the cotter pin length rapid measuring apparatus was optimally designed based on any one of examples 1 to 4.

As shown in fig. 1, 2 and 3, the base 1 has a rectangular parallelepiped structure with a middle groove. The middle groove is the working groove 101, the outer side of the frame opening edge of the working groove 101 is a 45-degree inclined plane 105, and standard scale marks 104 are printed on the inclined plane. In this embodiment, 3 groups of through holes are arranged side by side on one side of the base 1, where the through holes are pin limiting through holes 102. And in order to further reduce the volume of the whole device, as shown in fig. 3, adjacent 2 specifications share one through hole.

The slider 2 is mounted on the base 1. The sliding block 2 is provided with a positioning buckle 202, and can be fast clamped on two side walls of the working groove 101, and the sliding block 2 is locked on the base 1 through the locking knob 3.

The sliding block 2 is provided with 3 groups of through holes with U-shaped notches at one ends, which are matched with the specifications of the pin body limiting through holes 102 on the base 1, wherein the through holes are pin head limiting through holes 201 for placing pin heads of cotter pins K. When the cotter pin K is installed, the pin head of the cotter pin K is positioned at the pin head limiting through hole 201, and the pin body of the cotter pin K can penetrate through the cotter pin and the pin head of the cotter pin K cannot pass through the cotter pin, so that the cotter pin K is positioned, and movement of the cotter pin K is prevented.

Other portions of this embodiment are the same as those of embodiments 1 to 4, and thus will not be described in detail.

Example 6:

the present example provides a method for using the cotter pin length quick measuring apparatus on the basis of any one of examples 1 to 5. In this embodiment, the cotter pin length quick measurement device can be used for quick measurement of the cotter pin K length, can be used for quick trimming of the cotter pin K length after the cotter pin K is fixed in length, and can also be used as an auxiliary tool for trimming the cotter pin K length only without considering the cotter pin K length.

Whether the cotter pin K is to be length-measured or length-trimmed, the cotter pin K needs to be mounted in a cotter pin length quick measuring apparatus. During installation, the locking knob 3 is loosened, the sliding block 2 can freely slide in the working groove 101 of the base 1, the sliding block 2 is moved to a position capable of being placed with the cotter pin K, the cotter pin K passes through the pin head limiting through hole 201 of the sliding block 2 and the pin body limiting through hole 102 of the base 1, preliminary installation is carried out, and then the position of the cotter pin K is adjusted and fixed according to subsequent measurement or trimming requirements.

If the actual length of the cotter pin K or the adapting length of the cotter pin K during use is required to be calibrated by the cotter pin length quick measuring device, the cotter pin K is driven by the sliding block 2 to move along the setting direction of the graduation line 104, and the graduation value is read from the graduation line 104. When the scale value is read, the data of the scale value can be read by designing the indication line on the sliding block 2, and the function of the indication line can be replaced by the profile structure of the sliding block 2. As shown in FIG. 1, the scale value corresponding to the position of the sliding block 2 is about 3.45cm. It should be noted that, as a general device, the accuracy requirement for the length of the cotter pin K is not high in most usage scenarios, so that a constraint value can be adopted during calculation, measurement or trimming, and the accuracy of reading the scale value can be improved by improving the machining accuracy, the dimensional parameters and the like of each part in the cotter pin length rapid measurement device according to actual requirements. The scale value determination method can be realized by adopting a conventional technical means in the measurement field, and the improvement point of the method is not described here, so that the description is omitted.

When the cotter pin length quick measuring device is adopted to measure the length of the cotter pin K, the sliding block 2 which is not fastened with the base 1 is moved to a position where the cotter pin K to be trimmed can be placed in the working groove 101 of the base 1; then, sequentially penetrating the pin body of the cotter pin K through the pin head limiting through hole 201 and the pin body limiting through hole 102 and then penetrating out of the whole base 1, and installing the pin head of the cotter pin K at the pin head limiting through hole 201 of the sliding block 2 in a limiting manner; moving the sliding block 2 along the scale line 104, and driving the cotter pin K to be trimmed to move by utilizing the sliding block 2 until the tail end of the cotter pin K, which is far away from the pin body, is just flush with the outer end surface of the pin body limiting through hole 102; finally, the scale value of the scale indication end of the slider 2 corresponding to the scale line 104 at the moment is read and used as the length value of the cotter pin K.

When the cotter pin length quick measuring device is adopted to trim the length of the cotter pin K, the sliding block 2 which is not fastened with the base 1 is moved to a position where the cotter pin K to be trimmed can be placed in the working groove 101 of the base 1; then, sequentially penetrating the pin body of the cotter pin K through the pin head limiting through hole 201 and the pin body limiting through hole 102 and then penetrating out of the whole base 1, and installing the pin head of the cotter pin K at the pin head limiting through hole 201 of the sliding block 2 in a limiting manner; moving the sliding block 2 along the scale line 104, and driving the cotter pin K to be trimmed to move to the scale line 104 corresponding to the required adapting length of the cotter pin K by using the sliding block 2, wherein the part of the pin body of the cotter pin K extending out of the pin body limiting through hole 102 is the part to be trimmed; then, the locking knob 3 is screwed so that the sliding block 2 is locked on the base 1, namely, the cotter pin K is fixed; finally, a cutting tool or a shearing tool is used for cutting off the pin body from the outer end surface of the pin body limiting through hole 102 in a flush mode, and the cotter pin K with the length of the required adaptation length is obtained.

When the cotter pin length quick measuring device is used as an auxiliary tool for length trimming, the limitation of the corresponding positions of the sliding block 2 and the scale marks 104 can be eliminated, and the cotter pin K only needs to be ensured to pass through the pin body limiting through hole 102 of the base 1 and the pin head limiting through hole 201 of the sliding block 2 at the same time, and then the positions are fixed.

Other portions of this embodiment are the same as any one of embodiments 1 to 5, and thus will not be described in detail.

Example 7:

the present embodiment will be described by taking the use of the cotter pin K and the hexagonal nut in combination as an example on the basis of the above embodiment.

The adapted length of the cotter pin K needs to be known before trimming. As shown in fig. 16, the fitting length of the cotter pin K can be calculated by "l=1.732×l1+l1+0.5×l2", wherein: l is the adapting length of the cotter pin K, namely the fixed length of the cotter pin K during trimming; l1 is the single-side width of the hexagonal nut; l2 is the nut thickness. It should be noted that, the manner of calculating the adapting length of the cotter pin K is only used as an example, and the adapting length of the cotter pin K may be confirmed by different methods according to different situations, different requirements, and the like of the cotter pin K. The trimming can be performed by knowing the numerical value of the adapting length of the cotter pin K, and the calculating method of the adapting length of the cotter pin K is not improved, so that the detailed description is omitted.

The model number K of a certain cotter pin is GB91-3.2x60; i.e. the outer diameter of the pin body is 3.2mm. When the cotter pin length quick measuring device described in embodiment 5 is used for trimming the cotter pin K length, the cotter pin K is passed through the pin head limiting through hole 201 and the pin body limiting through hole 102 corresponding to the specification 3.2, and the pin head of the cotter pin K is in limiting connection with the slider 2; then, in a state that the locking knob 3 is loosened, the slider 2 drives the cotter pin K to adjust the position along the setting direction of the scale mark 104; after the adaptive length of the cotter pin K is calibrated through the scale marks 104, the locking knobs 3 at the two ends of the sliding block 2 are screwed to fasten the sliding block 2 on the base 1 and do not move any more; then, a cutting or shearing tool can be used for shearing the exceeding part of the cotter pin K at the position flush with the outer end surface of the base 1; after trimming, the locking knobs 3 at the two ends of the sliding block 2 are unscrewed, and the cotter pin K is detached from the sliding block 2, so that the cotter pin K meeting the requirement of the adapting length is obtained.

The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present invention fall within the scope of the present invention.

Claims (16)

1. The quick cotter pin length measuring device is characterized by comprising a base (1), a sliding block (2) and a locking knob (3); the base (1) is provided with a working groove (101) for placing the cotter pin (K), the head end of the working groove (101) is provided with a pin limiting through hole (102) which can be used for the pin body of the cotter pin (K) to penetrate and limit the pin body of the cotter pin (K), and the notch of the working groove (101) is provided with a scale mark (104) for directly acquiring the reserved length of the cotter pin (K) during trimming; the setting direction of the scale marks (104) is the same as the axial direction of the pin body limiting through holes (102);

the sliding block (2) is slidably arranged in the working groove (101) of the base (1) along the arrangement direction of the scale marks (104), and a pin head limiting through hole (201) which can be used for enabling a pin body of the cotter pin (K) to penetrate and limiting a pin head of the cotter pin (K) is arranged on the sliding block (2); the pin body limiting through holes (102) and the pin head limiting through holes (201) which correspond to each other in position are used as a group of mutually matched limiting hole structures and are used for jointly installing the same cotter pin (K);

the locking knob (3) is arranged on the sliding block (2); when the locking knob (3) is screwed, the sliding block (2) is fastened with the base (1), and at the moment, the sliding block (2) cannot slide; when the locking knob (3) is unscrewed, the sliding block (2) is unscrewed from the base (1), and at the moment, the sliding block (2) can slide along the working groove (101).

2. The cotter length quick measuring device according to claim 1, characterized in that the working groove (101) is provided with a linear chute (103) for limiting the installation of the slide block (2); the sliding block (2) is provided with a limit convex part (206) which is in sliding fit with the linear sliding groove (103).

3. A cotter length quick measuring device according to claim 1, characterized in that the notch of the working groove (101) is provided as a downwardly sloping design ramp (105).

4. A cotter length quick measuring device according to any of claims 1-3, characterized in that the slider (2) is of unitary construction; the sliding block (2) is divided into a pin head limiting part (2B) and a pin head connecting part (2A), wherein the pin head limiting part (2B) is close to the pin body limiting through hole (102), and the pin head connecting part (2A) is far away from the pin body limiting through hole (102);

the pin head limiting through hole (201) is arranged on the pin head limiting part (2B), and the pin head connecting part (2A) is provided with an opening part (203); the hole diameter of one end of the pin head limiting through hole (201) close to the opening part (203) is large, and the hole diameter of the other end far from the opening part (203) is small; the pin head limiting through hole (201) can allow the pin body of the cotter pin (K) to penetrate through, and one end of the pin head limiting through hole (201) with a small aperture can limit the pin head of the cotter pin (K) so that the pin head of the cotter pin (K) cannot penetrate through;

when trimming the cotter pin (K), the pin body of the cotter pin (K) penetrates from one end with a large aperture of the pin head limiting through hole (201), penetrates from one end with a small aperture of the pin head limiting through hole (201), and then penetrates through the pin body limiting through hole (102); the part of the cotter pin (K) extending out of the pin limiting through hole (102) is the part to be trimmed.

5. A cotter length quick measuring device according to claim 4, characterized in that the slide (2) is provided with a positioning buckle (202) for mounting the locking knob (3); the positioning buckle (202) is lapped on the notch of the working groove (101).

6. The device for rapidly measuring the length of a cotter according to claim 5, wherein the opening part (203) has a through groove structure penetrating up and down.

7. A cotter length quick measuring device according to claim 5, characterized in that the upper and/or lower part of the opening part (203) is provided with a cross-connecting part which improves the transversal working strength of the slider (2).

8. A cotter length quick measuring device according to any of claims 1-3, characterized in that the slider (2) is of a combined construction; the sliding block (2) consists of a pin head connecting block (21) and a pin head limiting block (22) which are detachably connected, and the pin head connecting block (21) is closer to the pin body limiting through hole (102) relative to the pin head limiting block (22); the pin head limiting through hole (201) is arranged on the pin head limiting block (22), and the end face, facing the pin head limiting block (22), of the pin head connecting block (21) is used as a pin head limiting surface (204) for abutting against the end part of the pin head of the cotter pin (K) to position; one end of the pin head limiting through hole (201) close to the pin head limiting surface (204) has a large aperture, and the other end of the pin head limiting through hole far away from the pin head limiting surface (204) has a small aperture; the pin head limiting through hole (201) can allow the pin body of the cotter pin (K) to penetrate through, and one end of the pin head limiting through hole (201) with a small aperture can limit the pin head of the cotter pin (K) so that the pin head of the cotter pin (K) cannot penetrate through;

when trimming the cotter pin (K), the pin body of the cotter pin (K) penetrates from one end with a large aperture of the pin head limiting through hole (201), penetrates from one end with a small aperture of the pin head limiting through hole (201), and then penetrates through the pin body limiting through hole (102); the part of the cotter pin (K) extending out of the pin limiting through hole (102) is the part to be trimmed.

9. The cotter length quick measuring device according to claim 8, characterized in that the pin head connecting block (21) and the pin head limiting block (22) are detachably connected through a concave-convex combined structure or a magnetic attraction mode.

10. The cotter length quick measuring device according to claim 8, characterized in that the pin head connecting block (21) is further provided with a magnet mounting groove (205); and the magnet (4) is detachably arranged in the magnet mounting groove (205) and is used for providing magnetic attraction force for the cotter pin (K) which can be magnetically attracted.

11. A cotter length quick measuring device according to claim 8, characterized in that the pin head connecting block (21) is made of ferromagnetic material and magnetized for providing magnetic attraction to the cotter pin (K) which can be attracted magnetically.

12. A cotter length quick measuring apparatus according to any one of claims 1-3, further comprising a tail anti-drop member (5) detachably mounted at the tail of the base (1) for preventing abnormal detachment of the slider (2).

13. The using method of the cotter pin length rapid measuring device is characterized in that the using method is a cotter pin (K) length measuring method; in this case, the cotter length measuring apparatus according to claim 1 is used for measuring the length of the cotter (K).

14. The method for using a cotter length quick measuring device according to claim 13, characterized in that the cotter length measuring method specifically means: firstly, moving the sliding block (2) which is not fastened with the base (1) to a position capable of placing a cotter pin (K) to be trimmed in a working groove (101) of the base (1); then, sequentially penetrating the pin body of the cotter pin (K) through the pin head limiting through hole (201) and the pin body limiting through hole (102) and then penetrating out of the whole base (1), and installing the pin head of the cotter pin (K) at the pin head limiting through hole (201) of the sliding block (2) in a limiting manner; the sliding block (2) is moved along the scale line (104), and the sliding block (2) is utilized to drive the cotter pin (K) to be trimmed to move until the tail end of the cotter pin (K) away from the pin body is just flush with the outer end surface of the pin body limiting through hole (102); finally, the scale value of the scale indication end of the sliding block (2) corresponding to the scale line (104) at the moment is read and used as the length value of the cotter pin (K).

15. The using method of the cotter pin length rapid measuring device is characterized in that the using method is a cotter pin (K) length trimming method; at this time, the cotter length quick-measuring apparatus according to claim 1 is used to cut the cotter length quickly.

16. The method for using a cotter pin length quick measuring device according to claim 15, characterized in that the cotter pin (K) length trimming method specifically means: firstly, moving the sliding block (2) which is not fastened with the base (1) to a position capable of placing a cotter pin (K) to be trimmed in a working groove (101) of the base (1); then, sequentially penetrating the pin body of the cotter pin (K) through the pin head limiting through hole (201) and the pin body limiting through hole (102) and then penetrating out of the whole base (1), and installing the pin head of the cotter pin (K) at the pin head limiting through hole (201) of the sliding block (2) in a limiting manner; the sliding block (2) is moved along the scale marks (104), the sliding block (2) is utilized to drive the cotter pin (K) to be trimmed to move to the scale marks (104) corresponding to the required adapting length of the cotter pin (K), and at the moment, the part of the pin body of the cotter pin (K) extending out of the pin body limiting through hole (102) is the part to be trimmed; then, the locking knob (3) is screwed so that the sliding block (2) is locked on the base (1), namely, a cotter pin (K) is fixed; finally, a cutting tool or a shearing tool is used for cutting off the pin body from the outer end surface of the pin body limiting through hole (102) in a flush mode, and the cotter pin (K) with the length of the required adaptation length is obtained.