Adjustable constant force friction drive

Abstract

An adjustable constant force friction drive device can effectively reduce the cost of equipment, improve the applicability in complex electromagnetic environment, simplify the maintenance process and meet the application requirements of diversified industrial scenes. The upper end of the air float shaft (1) is connected with the air float shaft fixing mechanism (2), the air float shaft fixing mechanism is connected with the sliding block guide rail (3), the front end of the servo motor (4) is connected with one end of the mechanical transmission unit, the other end of the mechanical transmission unit is connected with the friction roller (8), the friction roller is close to the air float shaft, the rear of the air float shaft is provided with the brake locking mechanism (10), the brake locking mechanism is a telescopic mechanism, when the air float shaft acts, the brake locking mechanism retracts, when the air float shaft does not act, the brake locking mechanism extends, the locking plate is close to the air float shaft, the front end of the brake locking mechanism is fixed with the locking plate (101), the two ends of the friction roller are connected with the pressure adjusting mechanism, and the pressure is maintained constant through the pressure adjusting mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of ultra-precision machining of optical components, and in particular to an adjustable constant force friction drive device. Background Technology

[0002] While traditional linear motor-driven air-bearing measuring axes in existing high-precision measuring equipment can achieve high motion accuracy, they suffer from limitations such as high cost, electromagnetic interference, and complex installation and debugging. As industries increasingly demand cost-effectiveness, environmental adaptability, and ease of maintenance for measuring equipment, there is a pressing need for more economical and efficient drive solutions. Utility Model Content

[0003] To overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an adjustable constant force friction drive device, which can effectively reduce equipment costs, improve applicability in complex electromagnetic environments, simplify maintenance procedures, and meet the application needs of diverse industrial scenarios.

[0004] The technical solution of this utility model is as follows: In this adjustable constant force friction drive device, the upper end of the air bearing shaft (1) is connected to the air bearing shaft fixing mechanism (2), the air bearing shaft fixing mechanism is connected to the slider guide rail (3), the front end of the servo motor (4) is connected to one end of the mechanical transmission unit, the other end of the mechanical transmission unit is connected to the friction roller (8), the friction roller is close to the air bearing shaft, and a brake locking mechanism (10) is provided at the rear of the air bearing shaft. The brake locking mechanism is a telescopic mechanism. When the air bearing shaft moves, the brake locking mechanism retracts. When the air bearing shaft does not move, the brake locking mechanism extends. The locking plate is close to the air bearing shaft. The front end of the brake locking mechanism is fixed with the locking plate (101). The two ends of the friction roller are connected to the pressure adjustment mechanism, and the pressure is kept constant through the pressure adjustment mechanism.

[0005] The beneficial technical effects of this utility model are as follows:

[0006] 1. This utility model uses a servo motor combined with a mechanical transmission unit to replace the linear motor, and realizes power transmission through mechanical friction, which can reduce the cost of the drive system by more than 50% compared with the prior art.

[0007] 2. This utility model uses friction rollers to achieve power transmission. The mechanical structure is simple and does not require the complex electromagnetic gap adjustment work required by traditional motor drives. This significantly reduces the difficulty and time cost of equipment debugging and makes subsequent maintenance convenient. Motor drive fault diagnosis is more complicated, while the main vulnerable parts of the friction drive mechanism are friction rollers and belts. Replacement is simple and reduces equipment downtime.

[0008] 3. The mechanical transmission unit designed in this utility model does not generate electromagnetic fields, thus eliminating electromagnetic interference problems. The motor drive system has high requirements for environmental cleanliness and electromagnetic compatibility, while the friction drive combined with the dustproof design can operate stably in harsh industrial environments such as dust and humidity.

[0009] 4. In the process of driving the air bearing shaft, the mechanical transmission unit designed in this utility model is not rigidly connected. In the event of an accidental collision, compared with the rigid connection of the traditional motor drive, which will cause damage to the workpiece at the collision point, the mechanical transmission unit of this utility model is not rigidly connected. In the event of an accidental collision, the friction contact surface can release the impact energy by slipping, which can reduce the risk of collision damage by more than 80%.

[0010] 5. This utility model is equipped with a brake locking mechanism. The brake locking mechanism is a telescopic mechanism. When the air bearing shaft moves, the brake locking mechanism retracts. When the air bearing shaft does not move, the brake locking mechanism extends. The locking plate is in close contact with the air bearing shaft. The surface of the locking plate is made of anti-slip material to lock the air bearing shaft and prevent slippage and collision damage.

[0011] 6. In this utility model, the friction rollers are in contact with the air bearing shaft, which drives the air bearing shaft to move up and down. The two ends of the friction rollers are connected to a pressure adjustment mechanism, which achieves constant pressure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the adjustable constant force friction drive device according to this utility model.

[0013] Figure 2 This is a partial structural schematic diagram of the adjustable constant force friction drive device according to the present invention.

[0014] Figure 3 This is a detailed schematic diagram of the adjustable constant force friction drive device according to the present invention. Detailed Implementation

[0015] like Figures 1-3 As shown, this adjustable constant force friction drive device has an air bearing shaft 1 with an air bearing shaft fixing mechanism 2 connected to the upper end. The air bearing shaft fixing mechanism is connected to the slider guide rail 3. The front end of the servo motor 4 is connected to one end of the mechanical transmission unit, and the other end of the mechanical transmission unit is connected to the friction roller 8. The friction roller is in close contact with the air bearing shaft. A brake locking mechanism 10 is provided at the rear of the air bearing shaft. The brake locking mechanism is a retractable mechanism. When the air bearing shaft moves, the brake locking mechanism retracts. When the air bearing shaft does not move, the brake locking mechanism extends. The locking plate is in close contact with the air bearing shaft. The front end of the brake locking mechanism is fixed with the locking plate 101. The two ends of the friction roller are connected to a pressure adjustment mechanism to maintain constant pressure.

[0016] The beneficial technical effects of this utility model are as follows:

[0017] 1. This utility model uses a servo motor combined with a mechanical transmission unit to replace the linear motor, and realizes power transmission through mechanical friction, which can reduce the cost of the drive system by more than 50% compared with the prior art.

[0018] 2. This utility model uses friction rollers to achieve power transmission. The mechanical structure is simple and does not require the complex electromagnetic gap adjustment work required by traditional motor drives. This significantly reduces the difficulty and time cost of equipment debugging and makes subsequent maintenance convenient. Motor drive fault diagnosis is more complicated, while the main vulnerable parts of the friction drive mechanism are friction rollers and belts. Replacement is simple and reduces equipment downtime.

[0019] 3. The mechanical transmission unit designed in this utility model does not generate electromagnetic fields, thus eliminating electromagnetic interference problems. The motor drive system has high requirements for environmental cleanliness and electromagnetic compatibility, while the friction drive combined with the dustproof design can operate stably in harsh industrial environments such as dust and humidity.

[0020] 4. In the process of driving the air bearing shaft, the mechanical transmission unit designed in this utility model is not rigidly connected. In the event of an accidental collision, compared with the rigid connection of the traditional motor drive, which will cause damage to the workpiece at the collision point, the mechanical transmission unit of this utility model is not rigidly connected. In the event of an accidental collision, the friction contact surface can release the impact energy by slipping, which can reduce the risk of collision damage by more than 80%.

[0021] 5. This utility model is equipped with a brake locking mechanism. The brake locking mechanism is a telescopic mechanism. When the air bearing shaft moves, the brake locking mechanism retracts. When the air bearing shaft does not move, the brake locking mechanism extends. The locking plate is in close contact with the air bearing shaft. The surface of the locking plate is made of anti-slip material to lock the air bearing shaft and prevent slippage and collision damage.

[0022] 6. In this utility model, the friction rollers are in contact with the air bearing shaft, which drives the air bearing shaft to move up and down. The two ends of the friction rollers are connected to a pressure adjustment mechanism, which achieves constant pressure.

[0023] Preferably, the pressure regulating mechanism has a pressure regulating base 11, and the pressure regulating base is provided with an adjustable slot 111.

[0024] Preferably, the mechanical transmission unit includes a belt 5, a motor pulley 6, and a friction pulley 7.

[0025] Preferably, the mechanical transmission unit is a fixed gear or a linear rack.

[0026] Preferably, the material of the contact area between the friction roller and the air bearing shaft is polyurethane, nitrile rubber, or silicone.

[0027] Preferably, the device further includes a buffer protection mechanism 9, which is disposed above the air bearing shaft fixing mechanism. A hydraulic damper is fixed on the buffer protection mechanism to provide a buffering force for the upward return of the air bearing shaft, while preventing the air bearing shaft from being damaged by an upper collision after sliding.

[0028] Preferably, the buffer protection mechanism is a hydraulic buffer 91, a pneumatic unit, or a spring mechanism.

[0029] Preferably, the pressure regulating mechanism includes a spring 12, a pneumatic unit, or a hydraulic mechanism.

[0030] Preferably, the device further includes a pressure regulating transfer component 13, which is connected to both ends of the friction roller (8). Bolts are fixed on the pressure regulating transfer component, and springs are fitted onto the bolts for fixation.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An adjustable constant force friction drive device, characterized in that: The upper end of the air bearing shaft (1) is connected to the air bearing shaft fixing mechanism (2), the air bearing shaft fixing mechanism is connected to the slider guide rail (3), the front end of the servo motor (4) is connected to one end of the mechanical transmission unit, the other end of the mechanical transmission unit is connected to the friction roller (8), the friction roller is close to the air bearing shaft, and a brake locking mechanism (10) is provided at the rear of the air bearing shaft. The brake locking mechanism is a telescopic mechanism. When the air bearing shaft moves, the brake locking mechanism retracts. When the air bearing shaft does not move, the brake locking mechanism extends. The locking plate is close to the air bearing shaft. The front end of the brake locking mechanism is fixed with the locking plate (101). The two ends of the friction roller are connected to the pressure adjustment mechanism, and the pressure is kept constant through the pressure adjustment mechanism.

2. The adjustable constant force friction drive device according to claim 1, characterized in that: The pressure regulating mechanism has a pressure regulating base (11), and the pressure regulating base is provided with an adjustable slot (111).

3. The adjustable constant force friction drive device according to claim 2, characterized in that: The mechanical transmission unit includes a belt (5), a motor pulley (6), and a friction pulley (7).

4. The adjustable constant force friction drive device according to claim 2, characterized in that: The mechanical transmission unit is a fixed gear or a linear rack.

5. The adjustable constant force friction drive device according to claim 1, characterized in that: The material at the contact point between the friction roller and the air bearing shaft is polyurethane, nitrile rubber, or silicone.

6. The adjustable constant force friction drive device according to claim 1, characterized in that: The device also includes a buffer protection mechanism (9), which is located above the air bearing fixing mechanism.

7. The adjustable constant force friction drive device according to claim 6, characterized in that: The buffer protection mechanism is a hydraulic buffer (91), a pneumatic unit, or a spring mechanism.

8. The adjustable constant force friction drive device according to claim 1, characterized in that: The pressure regulating mechanism includes a spring (12), a pneumatic unit, or a hydraulic mechanism.

9. The adjustable constant force friction drive device according to claim 1, characterized in that: The device also includes a pressure regulating transfer component (13), which is connected to both ends of the friction roller (8). Bolts are fixed on the pressure regulating transfer component, and springs are fitted onto the bolts for fixation.

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