A bearing lateral force equalization assembly device and method

Abstract

The present invention belongs to the field of mechanical assembly technology, and specifically relates to a bearing lateral force equalization assembly device and method. The device includes an equipment base, a bearing pressure cylinder, an actuator cylinder, a pressure cover, a position sensor, a reaction force jack screw, a reaction force jack rod and a pressure sensor. The assembly device and method have no requirements for the operating space environment, and are suitable for the requirements that the operating space of a fuselage or a complex assembly is small and large-scale equipment cannot be used. It has high cost performance and reliable installation quality, and can be widely used in on-site assembly of mechanical equipment stations.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical assembly, and in particular relates to a bearing lateral force-averaging assembly device and method. Background Art

[0002] In recent years, the domestic aviation industry has developed rapidly, and higher standards have been put forward for the lightweight, high-strength and high-temperature resistant design of products. Angular contact ball bearings are widely used in high-speed rotating mechanical transmission systems of products due to their smaller friction, higher rotation accuracy and low heat generation.

[0003] When angular contact ball bearings are used and installed, the outer ring of the bearing and the mounting seat generally use an interference or transition fit, and the inner ring of the bearing and the drive shaft also use an interference or transition fit. The installation process requires high pressure control accuracy, displacement control accuracy, and coaxial control accuracy. The product's bearing installation is generally carried out on the fuselage structure at the final assembly site. The operating space is small, the mounting seat, drive shaft and other matching relationship components have uncertain postures, and there is a lack of reliable on-site bearing installation process methods and process equipment.

[0004] Under the current technical level and production conditions, when installing bearings, the installers usually install the bearings manually, and need to rely on manual alignment and hammering, which is time-consuming and labor-intensive, with low installation efficiency and low precision. Since the inner and outer rings of the bearings are tightly matched and are precision parts, hammering will reduce the service life of the bearings. The installation shaft is at a certain angle to the horizontal plane of the machine body. During the installation process, the inner and outer rings of the bearings are unevenly stressed, which can easily cause bearing damage. Summary of the invention

[0005] In the first aspect, the present invention provides a transverse bearing force-balancing assembly device, comprising an equipment base 1, a bearing pressure cylinder 2, an actuator cylinder 3, a pressure cover 4, a position sensor 5, a reaction force jack screw 6, a reaction force jack rod 7 and a pressure sensor 8;

[0006] A bearing mounting hole is provided in the middle of the equipment base 1, and the diameter of the mounting hole is the same as the outer diameter of the bearing to be assembled; actuator cylinders 3 are symmetrically provided on both sides of the mounting hole; a bearing pressure cylinder 2 is installed above the bearing mounting hole, and a gap is provided on the bearing pressure cylinder 2 to cooperate with the reaction force push rod 7; a pressure cover 4 is provided above the bearing pressure cylinder 2 and the actuator cylinder 3; the reaction force push screw 6 is located inside the bearing pressure cylinder 2 and is coaxial with the bearing pressure cylinder 2; the reaction force push rod 7 is a symmetrical two-head fork type, and the two rod head ends of the reaction force push rod 7 are connected to the equipment base 1, and the reaction force push screw 6 is vertically connected to the two rod head connecting rods of the reaction force push rod 7; the position sensor 5 is fixed below the bearing pressure cylinder 2; the pressure sensor 8 is arranged in the equipment base 1.

[0007] Preferably, the actuator 3, position sensor 5, and pressure sensor 8 are connected to a control host 9; the control host 9 is also connected to a driving air source 10, and the driving air source 10 provides power for the movement of the actuator 3; the driving air source 10 is provided with an ascending driving device 10-1 and a descending driving device 10-2 at the upper and bottom parts of the actuator 3, respectively.

[0008] In a second aspect, the present invention provides a method for assembling a bearing using the assembly device as described in the first aspect, in cooperation with a bearing 01, a bearing mounting seat 02, a transmission shaft 03 and a positioning pin 04, specifically comprising the following steps:

[0009] S1: After one end of the transmission shaft 03 is installed in the fixed position, first install the bearing 01 into the equipment base 1, and then install the bearing mounting seat 02 and the equipment base 1 to the fixed position together through the positioning pin 04, the bearing seat 02 is below the equipment base 1, and the bearing seat 02 and the equipment base 1 are fastened to the fixed position;

[0010] S2: Install two actuators 3 onto the equipment base 1;

[0011] S3: Connect the reaction force jack screw 6 and the reaction force jack rod 7; place the bearing pressure cylinder 2 on the end surface of the equipment base 1, and the two rod heads of the reaction force jack rod 7 match the gap of the bearing pressure cylinder 2; connect the reaction force jack screw 6 and the end surface of the transmission shaft 03, and then tighten the reaction force jack screw 6 and the reaction force jack rod 7 through the bearing pressure cylinder 2 to press the reaction force jack rod 7 and the equipment base 1;

[0012] S4: Push the bearing pressing cylinder 2 into the equipment base 1;

[0013] S5: connecting the actuator 3 and the control host 9, adjusting the actuator 3 through the control host 9, and installing the gland 4;

[0014] S6: Connect the position sensor 5, the pressure sensor 8 and the control host 9, control the gland 4 to move downward until the pressure sensor 8 shows a reading, then adjust the position of the position sensor to set the action stroke of the actuator 3;

[0015] S7: Control the actuator 3 by controlling the main machine 9 to drive the pressure cover 4 to press into the bearing group with uniform force.

[0016] Preferably, in S4, lubricating oil is applied to the bearing cylinder 2 and then the bearing cylinder 2 is pushed into the equipment base 1.

[0017] Preferably, the inner ring bearing mounting hole of the equipment base 1 and the outer ring of the bearing 01 are matched with a small clearance, and the matching relationship is The nominal size is φ72mm in diameter, the machining tolerance of the bearing mounting hole is G6, and the machining tolerance of the bearing outer ring is h4.

[0018] Furthermore, the bearing mounting seat 02, the bearing 01 and the equipment base 1 are coaxial.

[0019] Furthermore, the bearing pressure cylinder 2 and the equipment base 1 are matched by a sliding key, and the matching relationship is The matching size is 8mm, the shaft groove tolerance is H9, and the key tolerance is h8.

[0020] Furthermore, three recesses are provided on the contact surface between the bearing cylinder 2 and the bearing 01 for installing the pressure sensor 5 .

[0021] Preferably, the reaction force jack screw 6 is connected to the transmission shaft 03 and the reaction force jack rod 7 through an M8 thread.

[0022] Preferably, in step S1, the bearing seat 02 and the equipment base 1 are fastened in a fixed position by four M8 bolts.

[0023] The beneficial effects achieved by the present invention are as follows: the device is driven by a lightweight small actuator instead of manual hammering, and the force is applied continuously during the installation process without irregular pulsating impacts caused by the hammering process; the bearing pressure cylinder 2 and the pressure cover 4 are designed with suitable sizes, so that the inner and outer rings of the bearing can be subjected to force at the same time during the force application process, thereby reducing the load passing through the rolling body during the installation process; the reaction force push screw 6 and the reaction force push rod 7 are designed to prevent the friction caused by the movement of the bearing toward the transmission shaft from causing the transmission shaft to generate lateral force, thereby impacting the other end of the transmission shaft for fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of the device of the present invention.

[0025] Figure 2 It is a first schematic diagram of the device structure of the present invention.

[0026] Figure 3 This is a second schematic diagram of the device structure of the present invention.

[0027] Figure 4 It is the assembly action principle diagram of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail in conjunction with the following examples.

[0029] It should be noted that the present invention is not limited to the following examples. The methods are conventional methods unless otherwise specified. The raw materials can be obtained from public commercial channels unless otherwise specified.

[0030] Example 1

[0031] A transverse bearing force-balancing assembly device, comprising an equipment base 1, a bearing pressure cylinder 2, an actuating cylinder 3, a pressure cover 4, a position sensor 5, a reaction force jack screw 6, a reaction force jack rod 7 and a pressure sensor 8;

[0032] A bearing mounting hole is provided in the middle of the equipment base 1, and the diameter of the mounting hole is the same as the outer diameter of the bearing to be assembled; actuator cylinders 3 are symmetrically provided on both sides of the mounting hole; a bearing pressure cylinder 2 is provided above the bearing mounting hole, and a gap matching with a reaction force push rod 7 is provided on the bearing pressure cylinder 2; a pressure cover 4 is provided above the bearing pressure cylinder 2 and the actuator cylinder 3; the reaction force push screw 6 is located inside the bearing pressure cylinder 2 and is coaxial with the bearing pressure cylinder 2; the reaction force push rod 7 is a symmetrical two-head fork type, and the two rod head ends of the reaction force push rod 7 are connected to the equipment base 1, and the reaction force push screw 6 is vertically connected to the reaction force push rod 7's two rod heads are connected on the rods; the position sensor 5 is fixed under the bearing pressure cylinder 2, and three depressions are set on the contact surface between the bearing pressure cylinder 2 and the bearing 01 for installing the pressure sensor 5; the pressure sensor 8 is set in the equipment base 1; the actuator cylinder 3, the position sensor 5, and the pressure sensor 8 are connected to the control host 9; the control host 9 is also connected to the driving air source 10, and the driving air source 10 provides power for the movement of the actuator cylinder 3; the driving air source 10 is respectively provided with an ascending driving device 10-1 and a descending driving device 10-2 at the upper and bottom parts of the actuator cylinder 3.

[0033] The method for assembling a bearing using the above-mentioned assembly device, in cooperation with the bearing 01, the bearing mounting seat 02, the transmission shaft 03 and the positioning pin 04, specifically comprises the following steps:

[0034] S1: After one end of the transmission shaft 03 is installed in the fixed position, first install the bearing 01 into the equipment base 1, and then install the bearing mounting seat 02 and the equipment base 1 to the fixed position together through the positioning pin 04. The bearing seat 02 is below the equipment base 1, and the bearing seat 02 and the equipment base 1 are fastened to the fixed position through 4 M8 bolts; the inner ring bearing mounting hole of the equipment base 1 and the outer ring of the bearing 01 are matched with a small clearance, and the matching relationship is The nominal size is φ72mm in diameter, the machining tolerance of the bearing mounting hole is G6, and the machining tolerance of the bearing outer ring is h4; the bearing mounting seat 02, the bearing 01 and the equipment base 1 are coaxial;

[0035] S2: Install two actuators 3 onto the equipment base 1;

[0036] S3: Connect the reaction force jack screw 6 and the reaction force push rod 7; place the bearing pressure cylinder 2 on the end face of the equipment base 1, and the two rod heads of the reaction force push rod 7 match the gap of the bearing pressure cylinder 2; connect the reaction force jack screw 6 and the end face of the transmission shaft 03, and then tighten the reaction force jack screw 6 and the reaction force push rod 7 through the bearing pressure cylinder 2 to press the reaction force push rod 7 and the equipment base 1; the reaction force jack screw 6 is connected to the transmission shaft 03 and the reaction force push rod 7 through the M8 thread;

[0037] S4: Apply lubricating oil to the bearing pressure cylinder 2 and push it into the equipment base 1; the bearing pressure cylinder 2 and the equipment base 1 are matched with a sliding key, and the matching relationship is The matching size is 8mm, the shaft groove tolerance is H9, and the key tolerance is h8.

[0038] S5: connecting the actuator 3 and the control host 9, adjusting the actuator 3 through the control host 9, and installing the gland 4;

[0039] S6: Connect the position sensor 5, the pressure sensor 8 and the control host 9, control the gland 4 to move downward until the pressure sensor 8 shows a reading, then adjust the position of the position sensor to set the action stroke of the actuator 3;

[0040] S7: Control the actuator 3 by controlling the main machine 9 to drive the pressure cover 4 to press into the bearing group with uniform force.

Claims

1. A transverse bearing force-balancing assembly device, characterized in that: It comprises an equipment base (1), a bearing pressure cylinder (2), an actuator cylinder (3), a pressure cover (4), a position sensor (5), a reaction force push screw (6), a reaction force push rod (7) and a pressure sensor (8); A bearing mounting hole is provided in the middle of the equipment base (1), and the diameter of the mounting hole is the same as the outer diameter of the bearing to be assembled; actuator cylinders (3) are symmetrically provided on both sides of the mounting hole; a bearing pressure cylinder (2) is provided above the bearing mounting hole, and a gap is provided on the bearing pressure cylinder (2) to cooperate with the reaction force push rod (7); a pressure cover (4) is provided above the bearing pressure cylinder (2) and the actuator cylinder (3); the reaction force push screw (6) is located inside the bearing pressure cylinder (2) and is coaxial with the bearing pressure cylinder (2); the reaction force push rod (7) is a symmetrical two-head fork type, and the two rod head ends of the reaction force push rod (7) are connected to the equipment base (1), and the reaction force push screw (6) is vertically connected to the two rod head connecting rods of the reaction force push rod (7); the position sensor (5) is fixed below the bearing pressure cylinder (2); and the pressure sensor (8) is arranged in the equipment base (1).

2. The device according to claim 1, characterized in that The actuator cylinder (3), the position sensor (5), and the pressure sensor (8) are connected to a control host (9); the control host (9) is also connected to a driving air source (10), and the driving air source (10) provides power for the movement of the actuator cylinder (3); the driving air source (10) is provided with an ascending driving device (10-1) and a descending driving device (10-2) at the top and bottom of the actuator cylinder (3), respectively.

3. A method for assembling a bearing using the assembly device according to claim 2, characterized in that: The assembly device cooperates with the bearing (01), the bearing mounting seat (02), the transmission shaft (03) and the positioning pin (04), and specifically comprises the following steps: S1: After one end of the transmission shaft (03) is installed in the fixed position, first install the bearing (01) into the equipment base (1), and then install the bearing mounting seat (02) and the equipment base (1) to the fixed position together through the positioning pin (04), with the bearing seat (02) below the equipment base (1), and fasten the bearing seat (02) and the equipment base (1) to the fixed position; S2: Install two actuators (3) onto the equipment base (1); S3: Connect the reaction force push screw (6) and the reaction force push rod (7); place the bearing pressure cylinder (2) on the end face of the equipment base (1), and the two rod heads of the reaction force push rod (7) match the gap of the bearing pressure cylinder (2); connect the reaction force push screw (6) and the end face of the transmission shaft (03), and then tighten the reaction force push screw (6) and the reaction force push rod (7) through the bearing pressure cylinder (2) to press the reaction force push rod (7) and the equipment base (1); S4: Push the bearing pressing cylinder (2) into the equipment base (1); S5: connecting the actuator cylinder (3) and the control host (9), adjusting the actuator cylinder (3) through the control host (9), and installing the gland (4); S6: Connect the position sensor (5), the pressure sensor (8) and the control host (9), control the gland (4) to move downward until the pressure sensor (8) shows a reading, then adjust the position of the position sensor to set the action stroke of the actuator (3); S7: The main control unit (9) controls the actuator (3) to drive the gland (4) to press the bearing assembly with uniform force.

4. A method according to claim 3, characterized in that: In the above-mentioned S4, lubricating oil is applied to the bearing cylinder (2) and then the bearing cylinder (2) is pushed into the equipment base (1).

5. A method according to claim 3, characterized in that: The inner ring bearing mounting hole of the equipment base (1) and the outer ring of the bearing (01) are matched with a small clearance, and the matching relationship is: The nominal size is φ72mm in diameter, the machining tolerance of the bearing mounting hole is G6, and the machining tolerance of the bearing outer ring is h4.

6. A method according to claim 5, characterized in that: The bearing mounting seat (02), the bearing (01) and the equipment base (1) are coaxial.

7. A method according to claim 6, characterized in that: The bearing pressure cylinder (2) and the equipment base (1) are matched by a sliding key, and the matching relationship is: The matching size is 8mm, the shaft groove tolerance is H9, and the key tolerance is h8.

8. A method according to claim 7, characterized in that: Three recesses are provided on the contact surface between the bearing pressure cylinder (2) and the bearing (01) for mounting a pressure sensor (5).

9. A method according to claim 3, characterized in that: The reaction force push screw (6) is connected to the transmission shaft (03) and the reaction force push rod (7) via an M8 thread.

10. A method according to claim 3, characterized in that: In step S1, the bearing seat (02) and the equipment base (1) are fastened in a fixed position by five M8 bolts.

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