Shaft type encoder mounting assembly, mounting method and adjusting method

Abstract

The invention discloses a shaft type encoder installation assembly which comprises a motor, an encoder shaft sleeve, a shaft type encoder arranged on the encoder shaft sleeve in a sleeving mode and a fixing support used for clamping the shaft type encoder. A fixing ring of the fixing support sleeves the shaft type encoder, a shaft hole is formed in an adjusting rod of the fixing support, and the positioning shaft penetrates through the shaft hole in the adjusting rod and then is fixed to a fixing base of the motor shell; a fixing pin shaft hole is formed in the tail end of the adjusting rod, the fixing pin shaft hole is connected with a rod end joint bearing through a pin shaft, the rod end of the rod end joint bearing is connected with an adjusting screw rod through an adjusting nut, and the other end of the adjusting screw rod is fixedly connected with an output shaft of an axial motor. The shaft type encoder can be fixed, secondary adjustment of axial movement or radial vibration can be achieved, damage to a shaft joint of the shaft type encoder is avoided, the rotating speed of a high-speed rotor is accurately measured, and the technical defect that when a motor rotor or a speed reducer shaft rotates at a high speed, the encoder installed at the shaft end is prone to damage due to shaft movement and radial vibration is overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of shaft encoder installation, and in particular relates to a shaft encoder installation assembly, an installation method and an adjustment method. Background Art

[0002] The encoder is mainly used to measure the rotor speed and angle, and is usually installed on the motor rotor or the reducer rotating shaft. The solid shaft encoder is installed on the motor or reducer rotating shaft. There are two installation methods: synchronous flange and clamping flange. Generally, the encoder flange end face mounting hole is directly used (such as Figure 1 The encoder and the mounting bracket are fixed by using the two installation methods (as shown in the figure). The two installation methods are different on the mounting bracket. However, due to the phenomenon of shaft displacement or radial vibration of the main shaft, the encoder installed on the motor rotor or reducer axial direction cannot adjust the vibration caused by shaft displacement and radial vibration. Especially when the motor rotor exceeds 6000r / min, it is easy to cause damage to the encoder shaft connection. In order to avoid damage to the connecting shaft, the encoder housing is loosened to a certain extent or a spring soft connection is used to alleviate the damage to the encoder shaft connection when the shaft is displaced, but the soft connection will cause errors in the number of pulses. Summary of the invention

[0003] The purpose of the present invention is to solve the above technical problems and to provide a shaft encoder installation assembly, installation method and adjustment method that can accurately measure the rotation speed of a high-speed rotor.

[0004] To achieve the above-mentioned purpose, the present invention provides a shaft encoder installation assembly, including a motor, an encoder sleeve sleeved on the end of the motor rotor connecting shaft, a shaft encoder sleeved on the encoder sleeve, and a fixed bracket for clamping the shaft encoder; the fixing ring of the fixed bracket is sleeved on the shaft encoder, the adjusting rod of the fixed bracket is provided with an axial hole, the positioning shaft passes through the axial hole on the adjusting rod and is fixed to a fixed base of the motor housing; the tail end of the adjusting rod is provided with a fixing pin shaft hole, the fixing pin shaft hole is connected to a rod end joint bearing through a pin shaft, the rod end of the rod end joint bearing is connected to an adjusting screw through an adjusting nut, and the other end of the adjusting screw is connected and fixed to the output shaft of the axial motor.

[0005] Furthermore, a plurality of threaded holes are evenly opened around the fixing ring, and the screw rods pass through the threaded holes and abut against the outer circumferential surface of the fixing ring. The cooperation of the plurality of screw rods fixes the shaft encoder in the fixing ring.

[0006] Furthermore, the center of the fixing bracket, the axis center of the shaft hole and the axis center of the fixing pin shaft hole are on the same axis.

[0007] Furthermore, a linear spring compression ratio test device is installed in each of the screw rods, and each linear spring compression ratio test device includes a linear spring, a pressure sensor, a compression ratio calculator and a signal line. The linear spring is built into the adjusting rod of the screw rod, and one end of the linear spring is against the outer circular surface of the fixing ring of the fixing bracket, and the other end is fixed on the pressure sensor; the pressure sensor is built into the adjusting rod of the screw rod, one end of the signal line is connected to the pressure sensor, and the other end passes through the nut of the screw rod and is connected to the spring compression comparator, and the compression comparator is arranged on the signal line.

[0008] Furthermore, the signals of the signal line are all transmitted to the spring compression comparator, and the spring compression comparator and the output shaft of the axial motor are both connected to the axial motor controller.

[0009] A method for installing the shaft encoder installation assembly as described above is also provided, specifically comprising:

[0010] 1) Install the fixed base so that the axis elevation of the positioning axis is at the same level as the rotor connecting axis of the motor;

[0011] 2) The shaft encoder is fixed in the fixing ring of the fixing bracket, and the positioning position of the shaft encoder in the fixing ring on the fixing bracket is controlled by adjusting the distance between the screws;

[0012] 3) After the shaft encoder is fixed to the fixed bracket through the screw, the fixed bracket is fixed to the positioning shaft of the fixed base, and the rod end joint bearing, adjusting nut, adjusting screw and the output shaft of the axial motor are synchronously connected;

[0013] 4) The rotor connecting shaft of the motor is matched and connected with the encoder sleeve of the shaft encoder;

[0014] 5) Use the dial indicator to align, adjust the length between the rod end joint bearing and the output shaft of the axial motor by rotating the adjusting nut, and calibrate the coaxiality between the shaft encoder and the rotor connecting shaft. Further, adjust the 30-50% compression ratio of the linear spring compression ratio test device as the initial value and transfer it to the spring compression comparator.

[0015] Furthermore, the coaxiality is ≤0.1 mm.

[0016] Finally, an adjustment method for the shaft encoder installation assembly as described above is also provided, wherein there are three screws, and a linear spring compression ratio test device is arranged in each screw, wherein the compression ratio of the linear spring compression ratio test device parallel to the output shaft of the axial motor is recorded as P3, and the compression ratios of the linear spring compression ratio test devices evenly distributed on both sides of the linear spring compression ratio test device are recorded as P1 and P2 respectively;

[0017] When the motor rotor speed is running from 0 to 8000r / min, the specific process of adjusting the eccentricity value of the shaft encoder is as follows:

[0018] When │P1-P2│<0.1, 0.6≥P3≥0.4, the axial motor controller controls the output shaft of the axial motor to remain unchanged;

[0019] When │P1-P2│<0.1, P3<0.4, the axial motor controller controls the output shaft length of the axial motor to increase until 0.6≥P3≥0.4;

[0020] When │P1-P2│<0.1, P3>0.6, the axial motor controller controls the output shaft length of the axial motor to decrease until 0.6≥P3≥0.4;

[0021] When │P1-P2│≥0.1 and P3<0.4, the axial motor controller gives the axial motor a signal with an amplitude of 5-7μm and a frequency of 10-15Hz, so that the output shaft of the axial motor maintains a weak vibration state;

[0022] When │P1-P2│≥0.1 and P3<0.4, the axial motor controller controls the output shaft length of the axial motor to increase until 0.6≥P3≥0.4;

[0023] When │P1-P2│≥0.1 and P3>0.6, the axial motor controller controls the output shaft length of the axial motor to decrease until 0.6≥P3≥0.4.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the mounting assembly of the present invention can not only fix the shaft-type encoder but also perform secondary adjustment of axial movement or radial jitter, thereby avoiding damage to the shaft connection of the shaft-type encoder and accurately measuring the rotation speed of the high-speed rotor, thus solving the technical defect that the encoder installed at the shaft end is easily damaged due to shaft movement and radial vibration when the motor rotor or the reducer shaft rotates at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Installation diagram for existing technology;

[0026] Figure 2 This is a schematic diagram of the installation assembly of the shaft encoder of the present invention;

[0027] Figure 3 for Figure 2 Schematic diagram of the structure of the linear spring compression ratio test device. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] As shown Figure 2The shaft encoder installation assembly shown includes a motor 1, an encoder sleeve 4 sleeved on the end of the rotor connecting shaft 2 of the motor 1, a shaft encoder 3 sleeved on the encoder sleeve 4, and a fixed bracket 5 for clamping the shaft encoder 3; a fixed ring at one end of the fixed bracket 5 is sleeved on the shaft encoder 3, and an adjusting rod at the other end of the fixed bracket 5 is provided with an axial hole 8, and a positioning shaft 9 is fixed to a fixed base 10 of the motor 1 housing after passing through the axial hole 8 on the adjusting rod, so that the fixed bracket 5 can rotate around the positioning shaft 9 and can also move axially along the axial hole 8 with the positioning shaft 9.

[0030] A plurality of threaded holes 6 are evenly formed around the fixing ring, and the screw rods 7 pass through the threaded holes 6 and abut against the outer circumferential surface of the fixing ring. The cooperation of the plurality of screw rods 7 fixes the shaft encoder 3 in the fixing ring. A fixing pin hole 11 is formed at the tail end of the adjusting rod, and the center of the fixing bracket 5, the axis of the axis hole 8 and the axis of the fixing pin hole 11 are on the same axis.

[0031] The fixed pin hole 11 is connected to the rod end joint bearing 12 through the pin, and the rod end of the rod end joint bearing 12 is connected to the adjusting screw 14 through the adjusting nut 13, and the other end of the adjusting screw 14 is connected and fixed to the output shaft of the axial motor 15. The adjusting nut 13 cooperates with the adjusting screw 14 to connect and fix the end of the adjusting rod of the fixed bracket 5 to the output shaft of the axial motor 15. At the same time, rotating the adjusting nut 13 can adjust the length between the rod end joint bearing 12 and the output shaft of the axial motor 15, thereby realizing the positioning and position adjustment of the fixed bracket 5.

[0032] A linear spring compression ratio test device 16 is installed in each screw rod 7. Figure 3 Each linear spring compression ratio test device 16 shown includes a linear spring 21, a pressure sensor 22, a compression ratio calculator 19 and a signal line 20. The linear spring 21 is built into the adjustment rod of the screw 7, and one end of the linear spring 21 is against the outer circumferential surface of the fixing ring of the fixing bracket 5, and the other end is fixed on the pressure sensor 22; the pressure sensor 22 is built into the adjustment rod of the screw 7, one end of the signal line 20 is connected to the pressure sensor 22, and the other end is connected to the spring compression comparator 19 after passing through the nut of the screw 7, and the compression comparator 19 is arranged on the signal line 20. The linear spring 21 is compressed after being subjected to the force of the shaft encoder 3. The pressure sensor 22 tests the linear spring 21 after being subjected to pressure, calculates its compressed length, and compares the compressed length with the length in the free state through the compression ratio calculator 19 to calculate the compression ratio of the linear spring 21, and the compression ratio is input into the spring compression comparator 17 through the signal line 20. The spring compression comparator 17 and the output shaft of the axial motor 15 are both connected to the axial motor controller 18. The axial motor 15 adjusts the length of the axial motor output shaft through the axial motor controller 18, and further adjusts the alignment of the shaft encoder 3 and the main shaft of the motor 1.

[0033] The specific process of installing and adjusting the shaft encoder is as follows: 1) Install the fixed base 10 so that the shaft elevation of the positioning shaft 9 is kept at the same horizontal elevation as the rotor connecting shaft 2 of the motor 1, that is, the center of the fixing ring of the fixing bracket 5 is kept at the same horizontal elevation as the rotor connecting shaft 2; 2) The shaft encoder 3 is fixed in the fixing ring of the fixing bracket 5, and the positioning position of the shaft encoder 3 in the fixing ring on the fixing bracket 5 is controlled by adjusting the distance between the screws 7; 3) After the shaft encoder 3 is fixed to the fixing bracket 5 by the screws 7, the fixing bracket 5 is then fixed to the positioning shaft 9 of the fixed base 10, and the rod end joint bearing 12, the adjusting nut 13, and the adjusting screw 7 are synchronously connected. The screw 14 and the output shaft of the axial motor 15 adjust the compression ratio of the linear spring compression ratio test device 16 to 30-50% as the initial value, and transmit it to the spring compression comparator 19; 4) The rotor connecting shaft 2 of the motor 1 is matched and connected with the encoder sleeve 4 of the shaft encoder 3 to measure the speed or angle of the motor 1; 5) With the help of a dial indicator to align the table, adjust the length between the rod end joint bearing 12 and the output shaft of the axial motor 15 by rotating the adjusting nut 13, calibrate the coaxiality of the shaft encoder 3 and the rotor connecting shaft 2, avoid excessive eccentric installation, and adjust the center height of the fixed bracket 5 according to actual needs on site, and the coaxiality ≤0.1mm is sufficient.

[0034] The rotor connecting shaft of the motor is connected with the shaft-type encoder sleeve of the shaft-type encoder to measure the rotation speed or angle of the motor. When the motor is working, if axial movement occurs, the shaft-type encoder fixed on the fixed bracket can move synchronously along the positioning shaft and the rotor connecting shaft; if radial vibration occurs, the rod end joint bearing rotates and swings at any angle to eliminate the radial vibration of the rotor connecting shaft, thereby protecting the shaft-type encoder; if radial large vibration occurs, the eccentric force of the shaft-type encoder in different directions during rotation can be tested by the linear spring compression ratio test device of the shaft-type encoder, and the compression ratio is transmitted to the spring compression comparator. After the axial motor controller receives the spring compression comparator signal, it controls the output shaft length and amplitude of the axial motor and adjusts the eccentric value of the shaft-type encoder. The shaft-type encoder installation assembly of the present invention allows the shaft-type encoder to maintain synchronous movement with the rotor connecting shaft of the motor, and can accurately measure the rotation of the motor when the rotation speed reaches 6000-8000r / min.

[0035] In this embodiment, there are three screw rods 7, and a linear spring compression ratio test device is arranged in each screw rod 7, wherein the compression ratio of the linear spring compression ratio test device parallel to the output shaft of the axial motor 15 is recorded as P3, and the compression ratios of the linear spring compression ratio test devices evenly distributed on both sides of the linear spring compression ratio test device are recorded as P1 and P2 respectively.

[0036] When the rotor speed of motor 1 is running from 0 to 8000r / min, the specific process of adjusting the eccentricity value of the shaft encoder is as follows:

[0037] When |P1-P2|<0.1, 0.6≥P3≥0.4, the axial motor controller 18 controls the output shaft of the axial motor 15 to remain unchanged.

[0038] When |P1-P2|<0.1 and P3<0.4, the axial motor controller 18 controls the output shaft length of the axial motor 15 to increase until 0.6≥P3≥0.4.

[0039] When |P1-P2|<0.1, P3>0.6, the axial motor controller 18 controls the output shaft length of the axial motor 15 to decrease until 0.6≥P3≥0.4.

[0040] When |P1-P2|≥0.1 and P3<0.4, the axial motor controller 18 gives the axial motor 15 a signal with an amplitude of 5-7 μm and a frequency of 10-15 Hz, so that the output shaft of the axial motor 15 maintains a weak vibration state.

[0041] When |P1-P2|≥0.1 and P3<0.4, the axial motor controller 18 controls the output shaft length of the axial motor 15 to increase until 0.6≥P3≥0.4.

[0042] When |P1-P2|≥0.1 and P3>0.6, the axial motor controller 18 controls the output shaft length of the axial motor 15 to decrease until 0.6≥P3≥0.4.

Claims

1. A shaft encoder installation assembly, characterized in that: The invention comprises a motor (1), an encoder sleeve (4) sleeved on the end of a rotor connecting shaft (2) of the motor (1), an axial encoder (3) sleeved on the encoder sleeve (4), and a fixing bracket (5) for clamping the axial encoder (3); a fixing ring of the fixing bracket (5) is sleeved on the axial encoder (3), an adjusting rod of the fixing bracket (5) is provided with an axial hole (8), a positioning shaft (9) passes through the axial hole (8) on the adjusting rod and is fixed on a fixing base (10) of the motor (1) housing; a fixing pin hole (11) is provided at the rear end of the adjusting rod, the fixing pin hole (11) is connected to a rod end joint bearing (12) through a pin, a rod end of the rod end joint bearing (12) is connected to an adjusting screw (14) through an adjusting nut (13), and the other end of the adjusting screw (14) is connected and fixed to the output shaft of the axial motor (15).

2. The shaft encoder installation assembly according to claim 1, characterized in that: A plurality of threaded holes (6) are evenly formed around the fixing ring. The screw rods (7) pass through the threaded holes (6) and abut against the outer circumferential surface of the fixing ring. The cooperation of the plurality of screw rods (7) fixes the shaft encoder (3) in the fixing ring.

3. The shaft encoder installation assembly according to claim 1, characterized in that: The center of the fixing bracket (5), the axis of the shaft hole (8) and the axis of the fixing pin shaft hole (11) are on the same axis.

4. The shaft encoder installation assembly according to claim 1, characterized in that: A linear spring compression ratio test device (16) is installed in each of the screw rods (7). Each linear spring compression ratio test device (16) comprises a linear spring (21), a pressure sensor (22), a compression ratio calculator (19) and a signal line (20). The linear spring (21) is built into the adjustment rod of the screw rod (7), and one end of the linear spring abuts against the outer circumferential surface of the fixing ring of the fixing bracket (5), and the other end is fixed to the pressure sensor (22). The pressure sensor (22) is built into the adjustment rod of the screw rod (7). One end of the signal line (20) is connected to the pressure sensor (22), and the other end passes through the nut of the screw rod (7) and is connected to the spring compression comparator (19). At the same time, the compression comparator (19) is arranged on the signal line (20).

5. The shaft encoder installation assembly according to claim 4, characterized in that: The signals of the signal line (20) are all transmitted to the spring compression comparator (17), and the spring compression comparator (17) and the output shaft of the axial motor (15) are both connected to the axial motor controller (18).

6. A method for installing the shaft encoder installation assembly according to claim 1, characterized in that: The installation method is specifically as follows: 1) Installing a fixed base (10) so that the axis elevation of the positioning axis (9) and the rotor connecting axis (2) of the motor (1) are kept at the same horizontal elevation; 2) The shaft encoder (3) is fixed in a fixed ring of the fixed bracket (5), and the positioning position of the shaft encoder (3) in the fixed ring on the fixed bracket (5) is controlled by adjusting the distance between the screws (7); 3) After the shaft encoder (3) is fixed to the fixed bracket (5) through the screw (7), the fixed bracket (5) is then fixed to the positioning shaft (9) of the fixed base (10), and the rod end joint bearing (12), the adjusting nut (13), the adjusting screw (14) and the output shaft of the axial motor (15) are synchronously connected; 4) The rotor connecting shaft (2) of the motor (1) is matched and connected with the encoder shaft sleeve (4) of the shaft encoder (3); 5) Use a dial indicator to align the shaft, adjust the length between the rod end joint bearing (12) and the output shaft of the axial motor (15) by rotating the adjusting nut (13), and calibrate the coaxiality between the shaft encoder (3) and the rotor connecting shaft (2).

7. The method for installing the shaft encoder installation assembly according to claim 6, characterized in that: The compression ratio of the linear spring compression ratio test device (16) is adjusted to 30-50% as an initial value and is transmitted to the spring compression comparator (19).

8. The method for installing the shaft encoder installation assembly according to claim 6, characterized in that: The coaxiality is ≤0.1mm.

9. A method for adjusting the shaft encoder mounting assembly as claimed in claim 5, characterized in that: There are three screw rods (7), and a linear spring compression ratio test device is arranged in each screw rod (7), wherein the compression ratio of the linear spring compression ratio test device parallel to the output shaft of the axial motor (15) is recorded as P3, and the compression ratios of the linear spring compression ratio test devices evenly distributed on both sides of the linear spring compression ratio test device are recorded as P1 and P2 respectively; When the rotor speed of the motor (1) is running from 0 to 8000 r / min, the specific process of adjusting the eccentricity value of the shaft encoder is as follows: When |P1-P2|<0.1, 0.6≥P3≥0.4, the axial motor controller (18) controls the output shaft of the axial motor (15) to remain unchanged; When |P1-P2|<0.1, P3<0.4, the axial motor controller (18) controls the output shaft length of the axial motor (15) to increase until 0.6≥P3≥0.4; When |P1-P2|<0.1, P3>0.6, the axial motor controller (18) controls the output shaft length of the axial motor (15) to decrease until 0.6≥P3≥0.4; When |P1-P2|≥0.1 and P3<0.4, the axial motor controller (18) gives the axial motor (15) a signal with an amplitude of 5 to 7 μm and a frequency of 10 to 15 Hz, so that the output shaft of the axial motor (15) maintains a weak vibration state; When |P1-P2|≥0.1 and P3<0.4, the axial motor controller (18) controls the output shaft length of the axial motor (15) to increase until 0.6≥P3≥0.4; When |P1-P2|≥0.1 and P3>0.6, the axial motor controller (18) controls the output shaft length of the axial motor (15) to decrease until 0.6≥P3≥0.4.

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