CN101598532A - Chain length measuring instrument - Google Patents

Abstract

The invention relates to a chain length measuring instrument, which comprises a chain tensioning mechanism and a chain length measuring mechanism. The chain tensioning mechanism comprises a servo motor, and the servo motor drives a screw rod B to rotate to drive the movable clamp seat to do linear motion on the linear guide rail B and the linear guide rail C so as to tension the chain. The chain length measuring mechanism comprises a sensing head and an encoder, and the motor drives a lead screw A to rotate and drive the sensing head to do linear motion on a linear guide rail A so as to measure the length of the chain. The invention has the advantages that: the tension force can be preset on the control panel, the servo motor is used for tensioning the chain, and the control is accurate and reliable. The motor drives the sensing head to measure the length of the chain, and the length is counted and transmitted to the control panel by the encoder to automatically display the length of the chain. Therefore, the invention has the advantages of high measurement precision, preset control and automatic data display, convenient reading, high efficiency and the like.

Description

Chain Length Meter

technical field

The chain length measuring instrument of the invention relates to a measuring instrument for chain length.

Background technique

The chain is a key part in the sprocket chain transmission, and the chain length is a key parameter. If the error of the chain length exceeds the standard, it will affect the transmission accuracy, efficiency and the service life of the sprocket chain. The existing chain length measuring instrument includes a chain tensioning mechanism and a length measuring mechanism. First, the chain is pre-tensioned to tension the chain, and then the length of the chain containing X chain links specified in the standard is measured. The chain tension is The tightening mechanism adopts a hydraulic mechanism. Since it is a hydraulic mechanism, pumps, valves, boxes, cylinders, pipes, meters, joints, etc. are indispensable in the system. The mechanism is complicated and bulky. The tension force applied is converted from the pressure displayed by the hydraulic gauge. It is inconvenient and not accurate, and the measurement of the length of the chain is to manually move the measuring head, which has low efficiency and affects the measurement accuracy.

Contents of the invention

The technical problem to be solved by the present invention is to design and provide a chain length measuring instrument in order to overcome the above disadvantages. The tension force can be preset on the control panel, the chain is tensioned by the servo motor, the motor drives the sensing head to automatically measure the chain length, counted by the encoder, and the chain length is automatically displayed on the control panel. Accurate measurement, high precision, preset control and automatic data display, convenient reading and high efficiency.

The present invention adopts the following technical solutions.

The chain length measuring instrument includes a frame and a chain tensioning mechanism, and also includes a chain length measuring mechanism, which includes a sensing head, a left photoelectric sensor, a right photoelectric sensor, a left positioning pin, a right positioning pin, and an encoder It is connected with the motor, lead screw A, and linear guide rail A installed on the frame. The two ends of the lead screw A are respectively connected to the output shaft of the motor and the input shaft of the encoder, and the screw nut on the lead screw A is connected to the sensor head. The motor can drive the lead screw A to rotate and drive the sensing head to move linearly on the linear guide rail A. The left photoelectric sensor and the right photoelectric sensor are placed on the machine table and are respectively adjacent to the left positioning pin and right positioning pin. The left positioning pin is inserted Connect the two in the socket of the left clamp and the pin hole at the left end of the sample chain, insert the right positioning pin into the socket of the right clamp and the pin hole at the right end of the sample chain to connect the two, and connect the left clamp with the force sensor. The force sensor is connected with the slide block fixedly arranged on the fixture fixing seat on the machine table, and the right fixture is connected with the movable fixture seat.

The chain tensioning mechanism includes a servo motor installed on the frame, a lead screw B, a linear guide rail B, a linear guide rail C, a fixed fixture seat, a movable fixture seat, a left fixture, a right fixture, a force sensor, one end of the lead screw B and The output shaft of the servo motor is connected, and the screw nut on the screw B is connected to the movable fixture seat. The servo motor can drive the screw B to rotate and drive the movable fixture seat to move linearly on the linear guide rail B and linear guide rail C to tension the chain. Both ends of the sensor are respectively connected with the slide block on the fixed fixture seat and the left fixture.

There is a vertical slide rail on the fixed fixture seat, and a slide block slidingly matched with it is arranged on the vertical slide rail. The side of the slide block is connected with the force sensor, and the top of the slide block is connected with the adjustment knob. The force sensor moves up and down with the slider to drive the left fixture and the sample chain connected with the left fixture to move up and down relative to the machine table.

The advantage of the present invention is that: compared with the prior art, the present invention can preset the tension force on the control panel, and the servo motor executes the tensioning chain, and the control is accurate and reliable. The motor drives the sensing head to measure the chain length, and the encoder counts and transmits it to the control panel, which automatically displays the chain length. Therefore, the present invention has the advantages of high measurement precision, preset control and automatic data display, convenient reading and high efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention;

Fig. 2 is the schematic diagram of the three-dimensional structure of the chain length measuring mechanism of the present invention;

Fig. 3 is the front view of Fig. 2;

Figure 4 is a top view of Figure 2;

Fig. 5 is a three-dimensional schematic diagram of the chain tensioning mechanism of the present invention.

Detailed ways

The present invention will be further described in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1 to Fig. 5, a chain length measuring instrument includes a frame and a chain tensioning mechanism, and also includes a chain length measuring mechanism, which includes a sensor head 3, a left photoelectric sensor 12, a right photoelectric sensor 4. Left positioning pin 111, right positioning pin 151, encoder 10, motor 1, lead screw A4, linear guide rail A9 installed on the frame, the two ends of lead screw A4 are connected with the output shaft of motor 1 and encoder 10 respectively connected to the input shaft of the lead screw A4, the screw nut on the lead screw A4 is connected to the sensing head 3, the motor 1 can drive the lead screw A4 to rotate and drive the sensing head 3 to make a linear motion on the linear guide rail A9, the left photoelectric sensor 12, the right photoelectric sensor The device 14 is placed on the machine table 22 and is respectively adjacent to the left positioning pin 111 and the right positioning pin 151. The left positioning pin 111 is inserted into the jack of the left clamp 11 and the pin hole at the left end of the sample chain 13 to connect the two, and the right positioning pin The pin 151 is inserted into the jack of the right clamp 15 and the pin hole at the right end of the sample chain 13 to connect the two, the left clamp 11 is connected with the force sensor 7, and the force sensor is fixedly placed on the clamp fixing seat on the machine table (22) The slide block on the 17 is connected, and the right clamp 15 is connected with the movable clamp seat 16.

The chain tensioning mechanism includes a servo motor 5 installed on the frame, a lead screw B18, a linear guide rail B19, a linear guide rail C20, a fixed clamp seat 17, a movable clamp seat 16, a left clamp 11, a right clamp 15, and a force sensor 7. One end of the lead screw B18 is connected to the output shaft of the servo motor 5, and the screw nut on the lead screw B18 is connected to the movable fixture seat 16. The servo motor 5 can drive the lead screw B18 to rotate and drive the movable fixture seat 16 on the linear guide rail B19 and the linear guide rail C20. Make linear motion and tension chain, force sensor 7 both sides are connected with slide block on the fixed fixture seat 17 and left clamp 11 respectively.

There is a vertical slide rail on the fixed fixture seat 17, and a slide block that slides with it is arranged on the vertical slide rail. The side of the slide block is connected with the force sensor 7, and the top of the slide block is connected with the adjustment knob 2, and the rotation adjustment The knob can make the force sensor 7 move up and down with the slider to drive the left fixture 11 and the sample chain 13 connected with the left fixture to move up and down relative to the machine table 22, so that the central axes of the left and right positioning pins are on the same horizontal plane superior. Because the jack of the right clamp 15 is a slotted hole, the right positioning pin 151 can float up and down with the size of the chain link after being inserted into the hole. The socket of the left clamp 11 is a round hole. In order to ensure the accuracy of the tension force, the position of the left clamp relative to the machine table should be adjusted, that is, the position of the pin hole at the left end of the chain should be adjusted so that the center axis of the left positioning pin is inserted into the pin hole. The central axis of the right positioning pin is on the same level as the machine table to ensure accurate testing.

Briefly describe the working process of the present invention: place the sample chain 13 on the machine table 22, connect the left and right sides of the sample chain with the left and right clamps with the left and right positioning pins, and turn the adjustment knob 2 to make the left and right The central axis of the right positioning pin is at the same height as the machine table, and then the chain tension force is preset on the control panel 21, for example, 1000 Newtons, and the servo motor 5 is started to drive the movable clamp seat 16 to move to the right. When the force sensor 7 senses that the tension force reaches When the default value is 1000 Newtons, the servo motor locks the movable fixture seat and no longer moves to the right, the motor 1 is started, and the sensing head 3 is driven to walk from the left positioning pin to the right positioning pin, the encoder counts, and the data is transmitted to the control panel for display. is the chain length. The effect of left and right photoelectric sensor is: sensing head 3 is fast walking between left and right photoelectric sensor, walks at the left end of left photoelectric sensor or walks at the right end of right photoelectric sensor and is all walking at a slow speed, in order to avoid speed. Hitting the left and right positioning pins too quickly will affect the measurement accuracy.

The servo motor 5 , the motor 1 , the encoder 10 , the force sensor 7 , the left photoelectric sensor 12 , and the right photoelectric sensor 14 are all electrically connected to the control panel 21 . The control panel is a PLC plus a man-machine interface, and the PLC is a programmable controller.

Claims (3)

1, a kind of chain length measuring instrument, include frame and chain tensioning mechanism, it is characterized in that: also include chain linear measure longimetry mechanism, it includes sensing head (3), left side photoelectric sensor (12), right photoelectric sensor (14), left side register pin (111), right register pin (151), scrambler (10) and rack-mounted motor (1), leading screw A (4), line slideway A (9), the two ends of leading screw A (4) are connected with the output shaft of motor (1) and the input shaft of scrambler (10) respectively, screw on the leading screw A (4) is connected with sensing head (3), motor (1) can drive leading screw A (4) rotation driving sensing head (3) and go up moving linearly at line slideway A (9), left side photoelectric sensor (12), right photoelectric sensor (14) is placed in board face (22) and goes up and difference position adjacent left register pin (111), right register pin (151), left side register pin (111) inserts in the pin-and-hole of the jack of left anchor clamps (11) and sample chain (13) left end the two is connected, right register pin (151) inserts in the pin-and-hole of the jack of right anchor clamps (15) and sample chain (13) right-hand member the two is connected, left side anchor clamps (11) are connected with strength sensor (7), strength sensor is connected with the slide block of fixed in position on the anchor clamps holder (17) on the board face (22), and right anchor clamps (15) are connected with floating holder seat (16).

2, chain length measuring instrument according to claim 1, it is characterized in that: chain tensioning mechanism includes rack-mounted servo motor (5), leading screw B (18), line slideway B (19), line slideway C (20) and stationary fixture seat (17), floating holder seat (16), left side anchor clamps (11), right anchor clamps (15), strength sensor (7), the end of leading screw B (18) is connected with the output shaft of servo motor (5), screw on the leading screw B (18) is connected with floating holder seat (16), servo motor (5) can drive leading screw B (18) rotation and drive floating holder seat (16) moving linearly and tension chain on line slideway B (19) and line slideway C (20), strength sensor (7) two side ends respectively with stationary fixture seat (17) on slide block be connected with left anchor clamps (11).

3, chain length measuring instrument according to claim 1 and 2, it is characterized in that: the stationary fixture seat has upright slide rail on (17), sliding with it slide block of joining is arranged on the upright slide rail, the sidepiece of slide block is connected with strength sensor (7), the top of slide block is connected with adjusting knob (2), and the rotation adjusting knob can make strength sensor (7) move up and down with slide block and drives left anchor clamps (11) and the upper and lower motion of the relative board face of sample chain (13) (22) that is connected with left anchor clamps.

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