CN223064601U - Profile length measurement equipment - Google Patents

Abstract

The application relates to profile length measuring equipment which comprises a transmission rack, a measuring assembly and a measuring assembly, wherein the transmission rack comprises a base, a plurality of groups of driving wheel groups for driving the profile to linearly move are arranged at the top of the base, a first sensor is arranged at one end of the base, a second sensor is arranged at the other end of the base, the measuring assembly comprises a mounting plate fixed at the top of the base, a synchronous wheel for converting the linear movement of the profile into self-rotation movement is arranged on the mounting plate, and the synchronous wheel is connected with an encoder. According to the application, as the distance between the first sensor and the second sensor is known, the actual length of the section bar can be automatically and accurately measured by subtracting the displacement length of the section bar measured by the encoder when the section bar reaches the second sensor from the distance between the first sensor and the second sensor. The application adopts automatic measurement, simplifies the measurement process, increases the measurement efficiency and the measurement precision, and simultaneously effectively reduces the labor cost and the time cost.

Description

Profile length measurement equipment

Technical Field

The application relates to the technical field of section bar length measurement, in particular to section bar length measurement equipment.

Background

The length of raw materials purchased in the market is designed according to the factory specification, and the raw materials are measured and cut according to the length actually required when the raw materials are used. Currently common measuring methods include two, one is manual measurement by means of a conventional measuring tool and the other is measurement by means of a measuring instrument.

The manual measurement is carried out by means of tools such as a tape measure and a vernier caliper, and the measurement method is convenient, but has slower measurement speed when the accuracy requirement is higher, and a common operator is difficult to achieve higher accuracy, and the final measurement result is influenced by different operators and the reading visual angles.

The measuring instrument adopts an image projector to measure, and the measuring method has higher precision, but the measuring process has complex operation, low speed and high requirement on operators.

Therefore, the method for measuring the raw materials in the prior art has the defects that (1) certain errors exist in manual measurement, the precision is poor, the time and labor cost are consumed, the working efficiency is low, and (2) the measurement process is complex, the speed is low and the requirement on an operator is high when the measurement instrument is used for measuring.

Disclosure of Invention

The embodiment of the application provides a section bar length measurement device, which aims to solve the problems of poor measurement precision, time consumption and labor cost in the manual length measurement of section bars in the related technology.

A first aspect of an embodiment of the present application provides a profile length measurement apparatus, including:

the transmission rack comprises a machine base, wherein a plurality of groups of driving wheel groups for driving the section bar to linearly move are arranged at the top of the machine base, a first sensor is arranged at one end of the machine base, and a second sensor is arranged at the other end of the machine base;

The measuring assembly comprises a mounting plate fixed at the top of the machine base, and a synchronizing wheel used for converting the linear motion of the section bar into the self-rotation motion is arranged on the mounting plate and connected with an encoder.

In some embodiments, the driving wheel sets comprise rotating shafts which are rotatably connected to the machine base through bearing seats, driving wheels and chain wheels are coaxially and fixedly connected to the rotating shafts, the chain wheels of two adjacent driving wheel sets are synchronously and rotatably connected through a transmission chain, and a driving motor is connected to the rotating shaft of any driving wheel set.

In some embodiments, the first sensor and the second sensor are electrically connected with the driving motor through a controller, when the first sensor detects the profile, the driving motor drives the plurality of driving wheel sets to drive the profile to move towards the second sensor, and when the second sensor detects the profile, the controller controls the driving motor to stop.

In some embodiments, the measuring assembly further comprises an encoder measuring box which is connected to the mounting plate in a sliding manner along the vertical direction, an encoder bracket is connected in the encoder measuring box in a sliding manner, the synchronous wheel is connected to the encoder bracket in a rotating manner through a pin shaft, and the encoder is fixed on the encoder bracket.

In some embodiments, a sliding rail and a sliding block which are connected with each other in a sliding manner are arranged between the encoder measuring box and the mounting plate, the sliding rail is fixed on the mounting plate, the sliding block is fixedly connected with the encoder measuring box, and a first cylinder for driving the encoder measuring box to reciprocate along the length direction of the sliding rail is arranged on the mounting plate.

In some embodiments, one end of the pin shaft is fixedly connected with a first gear, an input shaft of the encoder is fixedly connected with a second gear in meshed connection with the first gear, and a second cylinder for driving the encoder support to move up and down is arranged on the encoder measuring box.

In some embodiments, the mounting plate is provided with a notch for entering the section bar, an idler wheel positioned below the synchronous wheel is arranged in the notch, and the idler wheel is rotatably connected to the mounting plate and supports the section bar to linearly move in an upward rotation mode.

In some embodiments, the device further comprises a feeding rack, wherein the feeding rack is positioned on one side of the transmission rack and gradually lowers in the height direction approaching the transmission rack, and a limiting plate for preventing the section bar from rolling is arranged on the feeding rack;

The feeding mechanism comprises a plurality of groups of feeding plates which are rotationally connected to the machine base and a linkage mechanism for driving the feeding plates to turn over, one end part of each feeding plate stretches into the feeding rack, and a limiting groove for guiding the section bar onto the driving wheel group is formed in each feeding plate.

In some embodiments, the feeding plates are connected with turning shafts, the turning shafts are rotatably connected to the machine base through bearing seats, the linkage mechanism comprises transmission rods, swing arms fixedly connected with one ends of the turning shafts are rotatably connected to the transmission rods, and the transmission rods are connected with third cylinders for driving the feeding plates to turn.

A second aspect of the embodiment of the present application provides a method for measuring a length of a profile, where the method uses the profile length measuring apparatus according to any one of the foregoing embodiments, and the method includes:

Placing the section bar to be measured on a feeding rack, and driving a feeding plate to turn over from a horizontal state to a vertical state by a linkage mechanism and supporting one section bar and entering a limiting groove;

After the section bar entering the limiting groove freely slides onto the driving wheel set, the driving wheel set drives the section bar to linearly move towards the direction approaching to the first sensor;

When the first sensor detects the profile, the driving wheel group stops moving, the synchronous wheel moves downwards and contacts the profile, and the encoder starts to detect the rotation information of the synchronous wheel;

The driving wheel group drives the section bar to linearly move towards the direction approaching to the second sensor, and the encoder records the rotation information of the synchronous wheel;

When the second sensor detects the profile, the wheel set is driven to stop moving, and the encoder sends rotation information of the synchronous wheel to the controller;

The controller converts the rotation information of the synchronous wheel recorded by the encoder into displacement information, and subtracts the displacement information from the distance between the first sensor and the second sensor to obtain the length of the profile.

The technical scheme provided by the application has the beneficial effects that:

The embodiment of the application provides a section bar length measuring device, which comprises a transmission rack, a measuring assembly and a synchronous wheel, wherein the transmission rack is provided with a plurality of groups of driving wheel groups for driving the section bar to move linearly, the driving wheel groups are arranged at the top of the base, one end of the base is provided with a first sensor, the other end of the base is provided with a second sensor, the measuring assembly comprises a mounting plate fixed at the top of the base, the mounting plate is provided with a synchronous wheel for converting the linear motion of the section bar into self-rotation motion, and the synchronous wheel is connected with an encoder.

Therefore, after the profile is placed on the transmission rack by the profile length measuring device, the driving wheel group of the transmission rack firstly moves the profile to the position of the first sensor in a straight line and then stops, after the profile is pressed down by the synchronous wheel of the measuring assembly, the driving wheel group of the transmission rack moves the profile to the position of the second sensor in a straight line and then stops, and the encoder connected with the synchronous wheel can measure the displacement length when the profile reaches the second sensor. Since the distance between the first sensor and the second sensor is known, the actual length of the profile can be automatically and accurately measured by subtracting the displacement length of the profile measured by the encoder when the profile reaches the second sensor from the distance between the first sensor and the second sensor. The application adopts automatic measurement, simplifies the measurement process, increases the measurement efficiency and the measurement precision, and simultaneously effectively reduces the labor cost and the time cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of a structure of an embodiment of the present application;

FIG. 2 is a top view of a structure of an embodiment of the present application;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a side view of the structure of an embodiment of the present application;

FIG. 5 is a front view of the structure of a measuring assembly according to an embodiment of the present application;

FIG. 6 is a side view of the structure of a measurement assembly according to an embodiment of the present application.

Reference numerals:

100. The device comprises a transmission rack, 110, a machine base, 111, a first sensor, 112, a second sensor, 120, a driving wheel set, 121, a bearing seat, 122, a rotating shaft, 123, a driving wheel, 124, a chain wheel, 125, a transmission chain, 130, a feeding mechanism, 131, a feeding plate, 132, a turnover shaft, 133, a swing arm, 134, a transmission rod, 135, a third cylinder, 136 and a limit groove;

200. Measuring assembly 210, mounting plate 211, synchronous wheel 212, encoder 213, encoder measuring box 214, first cylinder 215, slide rail 216, slide block 217, encoder bracket 218, second cylinder 219, idler wheel 220, gap 221, first gear 222, second gear;

300. A feeding rack, 301 a limiting plate, 400 a section bar.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The embodiment of the application provides a section bar length measurement device, which can solve the problems of poor measurement precision, time consumption and labor cost caused by manual length measurement of section bars in the related technology.

Referring to fig. 1 to 6, a first aspect of an embodiment of the present application provides a profile length measuring apparatus, comprising:

The transmission rack 100, the transmission rack 100 comprises a stand 110, the stand 110 extends along the length direction of the profile 400, and the stand 110 is longer than the profile 400. A plurality of groups of driving wheel groups 120 for driving the section bar 400 to linearly move are arranged at the top of the stand 110, and the plurality of groups of driving wheel groups 120 are sequentially arranged at intervals along the length direction of the stand 110. A first sensor 111 for detecting the position of the profile 400 is provided at one end of the stand 110, a second sensor 112 for detecting the position of the profile 400 is provided at the other end of the stand 110, and the distance between the first sensor 111 and the second sensor 112 is fixed and is greater than the length of the profile 400.

The measuring assembly 200, the measuring assembly 200 comprising a mounting plate 210 fixed on top of the housing 110, the mounting plate 210 being at the top of the housing 110 and being located at a mid-position between the first sensor 111 and the second sensor 112, the distance between the mounting plate 210 and the first sensor 111 being smaller than the length of the profile 400. The mounting plate 210 is provided with a synchronizing wheel 211 for converting the linear motion of the profile 400 into the self-rotation motion, the synchronizing wheel 211 is connected with an encoder 212, and the encoder 212 is used for detecting rotation information, such as rotation number or rotation angle information, of the synchronizing wheel 211.

After the profile 400 is placed on the transmission rack 100 by the profile length measuring device according to the embodiment of the application, the driving wheel set 120 of the transmission rack 100 firstly moves the profile 400 to the position of the first sensor 111 in a straight line and then stops, then after the synchronizing wheel 211 of the measuring assembly 200 presses the profile 400, the driving wheel set 120 of the transmission rack 100 moves the profile 400 to the position of the second sensor 112 in a straight line and then stops, and the encoder 212 connected with the synchronizing wheel 211 can measure the displacement length when the profile 400 reaches the second sensor 112.

Since the distance between the first sensor 111 and the second sensor 112 is known, subtracting the displacement length of the profile 400 measured by the encoder 212 when the profile 400 reaches the second sensor 112 from the distance between the first sensor 111 and the second sensor 112 can automatically accurately measure the actual length of the profile 400. The application adopts automatic measurement, simplifies the measurement process, increases the measurement efficiency and the measurement precision, and simultaneously effectively reduces the labor cost and the time cost.

In some alternative embodiments, referring to fig. 2 and 3, the embodiment of the present application provides a profile length measuring apparatus, wherein a driving wheel set 120 of the profile length measuring apparatus includes a rotating shaft 122 rotatably connected to a base 110 through a bearing block 121, and a driving wheel 123 and a sprocket 124 are coaxially and fixedly connected to the rotating shaft 122. The outer circumference of the driving wheel 123 is provided with an annular groove for placing the profile 400, and the profile 400 is linearly moved in a set direction by the driving wheel 123 in the annular groove of the driving wheel 123. The chain wheels 124 of two adjacent driving wheel sets 120 are synchronously connected in a rotating way through a transmission chain 125, and the rotating shaft 122 of any driving wheel set 120 is connected with a driving motor.

When the profile 400 falls onto the driving wheels 123 of the plurality of groups of driving wheel sets 120, the driving motor synchronously drives the driving wheels 123 of each driving wheel set 120 to reversely rotate through the transmission chain 125 and the chain wheel 124, and then the profile above the driving wheels 123 is linearly moved leftwards to the position of the first sensor 111. When the first sensor 111 detects the profile 400, the driving motor stops and starts to synchronously drive the driving wheels 123 of each driving wheel set 120 to rotate forward through the transmission chain 125 and the chain wheel 124, so that the profile above the driving wheels 123 is linearly moved rightward to the position of the second sensor 112.

In some alternative embodiments, referring to fig. 2 and 3, the embodiment of the present application provides a profile length measuring apparatus, in which a first sensor 111 and a second sensor 112 of the profile length measuring apparatus are electrically connected to a driving motor through a controller, and when the first sensor 111 detects the left end of the profile 400, the first sensor 111 sends a detection signal to the controller, and the controller controls the driving motor to stop rotating. The controller controls the driving motor to drive the plurality of driving wheel sets 120 to drive the section bar 400 to move towards the second sensor 112, and when the second sensor 112 detects the right end of the section bar 400, the second sensor 112 sends a detection signal to the controller, and the controller controls the driving motor to stop.

In some alternative embodiments, referring to fig. 4 to 6, the embodiment of the present application provides a profile length measuring apparatus, wherein the measuring assembly 200 of the profile length measuring apparatus further includes an encoder measuring case 213 slidably coupled to the mounting plate 210 in a vertical direction, an encoder bracket 217 is slidably coupled to the encoder measuring case 213, the synchronizing wheel 211 is rotatably coupled to the encoder bracket 217 through a pin, and the encoder 212 is fixed to the encoder bracket 217.

A sliding rail 215 and a sliding block 216 which are connected with each other in a sliding way are arranged between the encoder measuring box 213 and the mounting plate 210, the sliding rail 215 is fixed on the mounting plate 210, the sliding block 216 is fixedly connected with the encoder measuring box 213, and the encoder measuring box 213 moves up and down in a linear way relative to the mounting plate 210 under the guiding action of the sliding rail 215 and the sliding block 216. The mounting plate 210 is provided with a first cylinder 214 for driving the encoder measurement box 213 to reciprocate along the length direction of the slide rail 215.

When the profile 400 falls onto the driving wheels 123 of the plurality of sets of driving wheel sets 120, the first cylinder 214 drives the encoder measurement housing 213 to move downward along the length direction of the slide rail 215, so that the encoder measurement housing 213 and the encoder bracket 217, the synchronizing wheel 211 and the encoder 212 connected to the encoder measurement housing 213 move downward synchronously until the synchronizing wheel 211 comes into contact with and presses the profile 400 to stop. When the length of the profile 400 is measured, the first cylinder 214 drives the encoder measurement box 213 to move upwards along the length direction of the slide rail 215, so that the synchronizing wheel 211 is separated from the profile 400.

In some alternative embodiments, referring to fig. 4 to 6, the embodiment of the present application provides a profile length measuring apparatus, one end of a pin shaft of the profile length measuring apparatus is fixedly connected with a first gear 221, an input shaft of an encoder 212 is fixedly connected with a second gear 222 in meshed connection with the first gear 221, and a second cylinder 218 driving an encoder bracket 217 to move up and down is arranged on an encoder measuring box 213. The encoder bracket 217 is provided with an elongated hole connected to the encoder measurement box 213, and the encoder measurement box 213 is provided with a stopper pin penetrating into the elongated hole. The second cylinder 218 moves the encoder bracket 217 up and down along the length of the elongated hole, thereby floatingly adjusting the position and height of the synchronizing wheel 211.

The mounting plate 210 is provided with a notch 220 for entering the profile 400, an idler 219 is arranged below the synchronizing wheel 211 in the notch 220, and the idler 219 is rotatably connected to the mounting plate 210 and supports the profile 400 to linearly move in an upward rotation. The notch 220 in the mounting plate 210 is used to drop the profile 400 on top of the idler wheel 219, which idler wheel 219 is used to rotate the support profile 400 upwards, and the idler wheel 219 is directly below the synchronizing wheel 211, so that the idler wheel 219 and the synchronizing wheel 211 clamp the profile 400 together in a set direction for linear movement.

In some alternative embodiments, referring to fig. 2 to 4, the embodiment of the present application provides a profile length measuring apparatus further comprising a feeding stage 300, the feeding stage 300 being located at one side of the driving stage 100 and gradually lowered in height in a direction approaching the driving stage 100, so that the profile 400 located on the feeding stage 300 automatically rolls in the direction of the driving stage 100. A limiting plate 301 for preventing the section bar 400 from rolling is arranged on one side of the feeding rack 300 close to the transmission rack 100.

The machine base 110 is provided with a feeding mechanism 130, and the feeding mechanism 130 comprises a plurality of groups of feeding plates 131 rotatably connected to the machine base 110 and a linkage mechanism for driving the feeding plates 131 to turn over. One end part of the feeding plate 131 extends into the feeding rack 300, and a limiting groove 136 for guiding the profile 400 to the driving wheel set 120 is formed in the feeding plate 131, and the limiting groove 136 is of a V-shaped structure.

When the feeding plate 131 is a steel plate with a set thickness, and the linkage mechanism drives the feeding plate 131 to turn to a horizontal state, one end of the feeding plate 131 is located below one section bar 400 closest to the transmission rack 100. When the linkage mechanism drives the feeding plate 131 to turn from the horizontal state to the vertical state, one end of the feeding plate 131 supports one section bar 400 closest to the transmission rack 100, and the section bar 400 slides onto the driving wheel set 120 on the stand 110 under the guiding action of the limiting groove 136.

In some alternative embodiments, referring to fig. 3 and 4, the embodiment of the present application provides a profile length measuring apparatus, in which a loading plate 131 of the profile length measuring apparatus is connected to a turnover shaft 132, and the turnover shaft 132 is rotatably connected to a base 110 through a bearing housing 121. The linkage mechanism comprises a transmission rod 134, a swing arm 133 fixedly connected with one end of each overturning shaft 132 is rotatably connected to the transmission rod 134, and one end of the transmission rod 134 is connected with a third cylinder 135 for driving each feeding plate 131 to overturn.

Referring to fig. 1 to 6, a second aspect of the embodiment of the present application provides a method for measuring a length of a profile, using the profile length measuring apparatus according to any one of the above embodiments, the method comprising:

Step 101, the section bar 400 to be measured is placed on the feeding rack 300, and the linkage mechanism drives the feeding plate 131 to turn from a horizontal state to a vertical state and supports one section bar 400 to enter the limiting groove 136.

Step 102, after the profile 400 entering the limit groove 136 freely slides onto the driving wheel set 120, the linkage mechanism drives the feeding plate 131 to turn from a vertical state to a horizontal state, and the driving wheel set 120 drives the profile 400 to linearly move towards a direction approaching to the first sensor 111.

Step 103, when the first sensor 111 detects the profile 400, the driving wheel set 120 stops moving, the synchronizing wheel 211 moves downwards and contacts the profile 400, and the encoder 212 starts to detect the rotation information of the synchronizing wheel 211.

Step 104, the driving wheel set 120 drives the profile 400 to linearly move towards the direction approaching to the second sensor 112, the synchronizing wheel 211 converts the linear movement of the profile 400 into the self-rotation movement, and the encoder 212 records the rotation information of the synchronizing wheel 211.

Step 105, when the second sensor 112 detects the profile 400, the wheel set 120 is driven to stop moving, and the encoder 212 sends the rotation information of the synchronous wheel 211 to the controller.

Step 106, the controller converts the rotation information recorded by the encoder 212 on the synchronizing wheel 211 into displacement information, and subtracts the displacement information from the distance between the first sensor 111 and the second sensor 112 to obtain the length of the profile 400.

Principle of operation

The embodiment of the application provides a section bar length measuring device, which is characterized in that the section bar length measuring device is provided with a transmission bench 100, the transmission bench 100 comprises a base 110, a plurality of groups of driving wheel groups 120 for driving a section bar 400 to linearly move are arranged at the top of the base 110, a first sensor 111 is arranged at one end of the base 110, a second sensor 112 is arranged at the other end of the base 110, a measuring assembly 200 is arranged at the other end of the base 110, the measuring assembly 200 comprises a mounting plate 210 fixed at the top of the base 110, a synchronous wheel 211 for converting the linear movement of the section bar 400 into self-rotation movement is arranged on the mounting plate 210, and the synchronous wheel 211 is connected with an encoder 212.

Therefore, in the profile length measuring apparatus of the present application, after the profile 400 is placed on the driving rack 100, the driving wheel set 120 of the driving rack 100 first linearly moves the profile 400 to the position of the first sensor 111 and then stops, and then after the synchronizing wheel 211 of the measuring assembly 200 presses the profile 400, the driving wheel set 120 of the driving rack 100 linearly moves the profile 400 to the position of the second sensor 112 and then stops, and the encoder 212 connected to the synchronizing wheel 211 can measure the displacement length when the profile 400 reaches the second sensor 112.

Since the distance between the first sensor 111 and the second sensor 112 is known, subtracting the length of displacement of the encoder 212 when the profile 400 reaches the second sensor 112 from the distance between the first sensor 111 and the second sensor 112 automatically measures the actual length of the profile 400 accurately. The application adopts automatic measurement, simplifies the measurement process, increases the measurement efficiency and the measurement precision, and simultaneously effectively reduces the labor cost and the time cost.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via an intervening medium, or may be in communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A profile length measuring apparatus, comprising:

The transmission rack (100), the transmission rack (100) comprises a machine base (110), a plurality of groups of driving wheel groups (120) for driving the section bar (400) to move linearly are arranged at the top of the machine base (110), a first sensor (111) is arranged at one end of the machine base (110), and a second sensor (112) is arranged at the other end of the machine base (110);

The measuring assembly (200), the measuring assembly (200) is including fixing mounting panel (210) at frame (110) top, be equipped with on mounting panel (210) and be used for converting the rectilinear motion of section bar (400) into self rotary motion's synchronizing wheel (211), synchronizing wheel (211) are connected with encoder (212).

2. A profile length measuring apparatus as in claim 1, wherein:

the driving wheel sets (120) comprise rotating shafts (122) which are rotatably connected to the machine base (110) through bearing blocks (121), driving wheels (123) and chain wheels (124) are coaxially and fixedly connected to the rotating shafts (122), the chain wheels (124) of two adjacent driving wheel sets (120) are synchronously and rotatably connected through transmission chains (125), and driving motors are connected to the rotating shafts (122) of any driving wheel set (120).

3. A profile length measuring apparatus as in claim 2, wherein:

The first sensor (111) and the second sensor (112) are electrically connected with the driving motor through a controller, when the first sensor (111) detects the section bar (400), the driving motor drives the plurality of driving wheel sets (120) to drive the section bar (400) to move towards the second sensor (112), and when the second sensor (112) detects the section bar (400), the controller controls the driving motor to stop.

4. A profile length measuring apparatus as in claim 1, wherein:

the measuring assembly (200) further comprises an encoder measuring box (213) which is connected to the mounting plate (210) in a sliding mode along the vertical direction, an encoder support (217) is connected to the encoder measuring box (213) in a sliding mode, the synchronous wheel (211) is connected to the encoder support (217) in a rotating mode through a pin shaft, and the encoder (212) is fixed to the encoder support (217).

5. A profile length measuring apparatus as in claim 4, wherein:

Be equipped with slide rail (215) and slider (216) of mutual sliding connection between encoder measurement case (213) and mounting panel (210), slide rail (215) are fixed on mounting panel (210), slider (216) with encoder measurement case (213) fixed connection, be equipped with the drive on mounting panel (210) encoder measurement case (213) are followed length direction reciprocating motion's of slide rail (215) first cylinder (214).

6. A profile length measuring apparatus as in claim 4, wherein:

One end of the pin shaft is fixedly connected with a first gear (221), an input shaft of the encoder (212) is fixedly connected with a second gear (222) which is meshed with the first gear (221), and a second cylinder (218) which drives the encoder support (217) to move up and down is arranged on the encoder measuring box (213).

7. A profile length measuring apparatus as in claim 1, wherein:

the mounting plate (210) is provided with a notch (220) for entering the section bar (400), an idler wheel (219) positioned below the synchronous wheel (211) is arranged in the notch (220), and the idler wheel (219) is rotationally connected to the mounting plate (210) and supports the section bar (400) to linearly move in an upward rotation mode.

8. A profile length measuring apparatus as in claim 1, wherein:

The feeding device further comprises a feeding rack (300), wherein the feeding rack (300) is positioned on one side of the transmission rack (100) and gradually lowers in the direction approaching the transmission rack (100), and a limiting plate (301) for preventing the section bar (400) from rolling is arranged on the feeding rack (300);

The feeding mechanism (130) is arranged on the machine base (110), and the feeding mechanism (130) comprises a plurality of groups of feeding plates (131) which are rotatably connected to the machine base (110) and a linkage mechanism for driving the feeding plates (131) to turn over;

one end part of the feeding plate (131) stretches into the feeding rack (300), and a limiting groove (136) for guiding the section bar (400) to the driving wheel set (120) is formed in the feeding plate (131).

9. A profile length measuring apparatus as in claim 8, wherein:

The feeding plate (131) is connected with a turnover shaft (132), the turnover shaft (132) is rotationally connected to the base (110) through a bearing seat (121), the linkage mechanism comprises a transmission rod (134), a swing arm (133) fixedly connected with one end of each turnover shaft (132) is rotationally connected to the transmission rod (134), and the transmission rod (134) is connected with a third cylinder (135) for driving each feeding plate (131) to perform turnover motion.