A linear guide mechanism driven by a cylinder

Abstract

The utility model discloses a linear guide mechanism of pneumatic cylinder drive relates to mechanical automation technical field, which comprises frame, drive unit, guide unit and execution unit. Drive unit is the pneumatic cylinder fixed through pneumatic cylinder seat, guide unit includes at least one guide rod fixed through guide rod seat and parallel with pneumatic cylinder piston rod, and execution unit includes linear bearing seat and push hand, and linear bearing seat is equipped with linear bearing and slides on the guide rod, and one end is connected with pneumatic cylinder piston rod, and the other end is equipped with push hand. The utility model discloses the combination of guide unit and pneumatic cylinder drive, and can adopt double guide rod symmetrical coplanar layout, and can replace push hand, buffer pad and sensor etc. design, realizes high rigidity, high accuracy, and the linear motion of stable operation, and is suitable for the precision push pressure, positioning etc. operation in the automation production.

Description

Technical Field

[0001] This utility model relates to the field of mechanical automation technology, specifically to a cylinder-driven linear guide mechanism. Background Technology

[0002] In the field of industrial automation, linear motion mechanisms are widely used in processes such as material handling, workpiece positioning, product assembly, and inspection. Cylinders are often chosen as the drive source due to their simple structure, low cost, and ease of control. However, mechanisms driven by ordinary cylinders have significant shortcomings: the piston rod mainly bears axial force, has weak resistance to lateral loads, and is prone to wobbling during long strokes or under eccentric loads, leading to decreased motion accuracy and stability. Furthermore, the contact impact between the end effector (such as a pusher) and the workpiece can damage precision workpieces, and single-function mechanisms are difficult to adapt to changing operational requirements. Although high-precision solutions using lead screws and linear motors exist, their costs are high. Therefore, there is an urgent need for an economical linear guide mechanism that combines high rigidity, high precision, smooth operation, and a certain degree of functional expandability. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cylinder-driven linear guide mechanism that is compact in structure, has high guiding accuracy, strong resistance to off-center load, stable in operation and easy to expand its functions.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a cylinder-driven linear guide mechanism, comprising a frame, and a drive unit, a guide unit, and an execution unit mounted on the frame.

[0005] The drive unit is a cylinder, which is fixedly mounted on the frame via a cylinder seat.

[0006] The guiding unit includes at least one guide rod, which is fixed to the frame by a guide rod seat, and the axis of the guide rod is parallel to the movement direction of the cylinder piston rod.

[0007] The execution unit includes a linear bearing housing and a pusher. A linear bearing is installed inside the linear bearing housing, and the linear bearing is slidably sleeved on the guide rod. One end of the linear bearing housing is connected to the front end of the piston rod of the cylinder, and the pusher is installed at the other end.

[0008] Furthermore, bushings are provided at both ends of the linear bearing, and the bushings and the linear bearing are encapsulated in the linear bearing housing by a pressure cap to improve the assembly accuracy and stability.

[0009] Furthermore, the guiding unit includes two parallel guide rods symmetrically distributed on both sides of the cylinder, and the linear bearing housing is correspondingly provided with two linear bearings, each sleeved on one of the two guide rods. This symmetrical layout of the double guide rods significantly improves the rigidity and torsional resistance of the mechanism.

[0010] Furthermore, the linear bearing housing is connected to the front end of the cylinder piston rod through a cylinder pusher housing and a cylinder pusher, thus achieving reliable power transmission.

[0011] Furthermore, the pusher is detachably mounted on the linear bearing housing via a threaded connection or a pin connection, facilitating the replacement of different types of actuators to adapt to different operations.

[0012] Furthermore, the bushing is made of a self-lubricating material to reduce wear, extend service life, and reduce maintenance requirements.

[0013] Furthermore, the frame is equipped with a sensor for detecting the stroke position of the linear bearing housing, which enables stroke control and position feedback.

[0014] Furthermore, the plane containing the axes of the two guide rods is coplanar with the axis of the cylinder, ensuring that the line of action of the driving force passes through the center of the mechanism, avoiding the generation of additional torque, and making the movement more stable.

[0015] Furthermore, the working end face of the pusher is provided with a buffer pad to reduce impact and protect the workpiece and equipment.

[0016] Furthermore, the cylinder is a double-rod cylinder or a cylinder with a guide rod, which has better bending resistance and forms a double protection with the guide unit.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. High precision and high rigidity: The precise cooperation between the guide rod and the linear bearing provides accurate linear guidance for the actuator; the symmetrical layout and coplanar design of the double guide rod greatly enhance the mechanism's resistance to eccentric loads and torsion, resulting in smooth movement and high precision.

[0019] 2. Compact structure: The cylinder, guide rod, bearing housing and other components are integrated into the frame, with a reasonable layout and small space occupation.

[0020] 3. Strong functional expandability: The detachable pusher design, optional sensor mounting positions, and buffer pad settings enable the mechanism to flexibly adapt to various operating scenarios such as pushing, positioning, buffering contact, and position feedback.

[0021] 4. Economical and durable: While ensuring performance, it mainly uses cylinders and standard linear motion parts, so the cost is controllable; self-lubricating bushings and other designs reduce maintenance costs. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of one embodiment of the present invention.

[0024] In the diagram: 1. Pusher, 2. Guide rod seat, 3. Linear bearing seat, 4. Linear bearing, 5. Bushing, 6. Pressure cap, 7. Guide rod, 8. Cylinder pusher, 9. Cylinder pusher seat, 10. Cylinder seat, 11. Cylinder, 12. Frame. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1 As shown, this utility model provides the following technical solution: a cylinder-driven linear guide mechanism, with its frame 12 serving as the mounting base. The drive unit is a standard cylinder 11, which is securely mounted on the frame 12 using screws via a cylinder seat 10.

[0027] The guiding unit includes two parallel guide rods 7, which are fixedly mounted on the frame 13 via guide rod seats 2, and the axes of the two guide rods 7 are strictly parallel to the extension and retraction direction of the piston rod of the cylinder 11. In this embodiment, the two guide rods 7 are symmetrically arranged on both sides of the cylinder 11, and the plane containing the axes of the two guide rods 7 is coplanar with the axis of the cylinder 11, thereby forming a stable symmetrical support structure.

[0028] The actuator includes a linear bearing housing 3 and a pusher 1. Two linear bearings 4 are installed inside the linear bearing housing 3, slidably mounted on two guide rods 7. To ensure the stability of the linear bearings 4 and prevent dust accumulation, bushings 5 ​​are provided at both ends, and the bushings 5 ​​and linear bearings 4 are sealed within the linear bearing housing 3 using screws and a pressure cap 6. The bushings 5 ​​are preferably made of a self-lubricating material (such as graphite copper bushings or engineering plastics) to reduce friction and maintenance. One end of the linear bearing housing 3 is detachably connected to the piston rod front end of the cylinder 11 via a cylinder pusher head 8 and a cylinder pusher head seat 9. The pusher 1 is detachably mounted on the other end of the linear bearing housing 3 via a threaded connection (or pin connection). A buffer pad (not shown separately in the figure, but can be integrated into the pusher 1), such as a polyurethane pad, is bonded to the working end face of the pusher 1 (the side in contact with the pushed workpiece) to reduce impact and protect the workpiece.

[0029] A sensor 12 (such as a proximity switch or photoelectric sensor) is installed on the frame 12 to detect the travel limit or intermediate position of the linear bearing housing 3, so as to realize position feedback and control.

[0030] Working principle: When cylinder 11 is ventilated, its piston rod extends or retracts, driving the linear bearing housing 3 to move linearly along the guide rod 7 via the cylinder pusher 8 and cylinder pusher seat 9. Due to the high-precision fit between the linear bearing 4 and the guide rod 7, the movement of the linear bearing housing 3 is strictly limited to a linear trajectory, thereby driving the pusher 1 installed at its end to accurately complete the pushing or resetting action. Throughout the process, the cylinder piston rod only bears axial force, while the radial force is borne by the guide rod 7 and the linear bearing 4 pair.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A linear guide mechanism driven by a pneumatic cylinder, comprising a frame (12), characterized in that, It also includes a drive unit, a guide unit, and an execution unit; The drive unit is a cylinder (11), which is fixedly mounted on the frame (12) via a cylinder seat (10); The guide unit includes at least one guide rod (7) fixed to the frame (12) by a guide rod seat (2), and the axis of the guide rod (7) is parallel to the movement direction of the piston rod of the cylinder (11); The execution unit includes a linear bearing housing (3) and a pusher (1). A linear bearing (4) is installed inside the linear bearing housing (3). The linear bearing (4) is slidably sleeved on the guide rod (7). One end of the linear bearing housing (3) is connected to the front end of the piston rod of the cylinder (11), and the other end is equipped with the pusher (1).

2. The cylinder-driven linear guide mechanism according to claim 1, characterized by: The linear bearing (4) is provided with bushings (5) at both ends, and the bushings (5) and the linear bearing (4) are encapsulated in the linear bearing housing (3) by the cover (6).

3. The cylinder-driven linear guide mechanism according to claim 1 or 2, characterized by: The guide unit includes two parallel guide rods (7) symmetrically distributed on both sides of the cylinder (11), and the linear bearing seat (3) is provided with two linear bearings (4), which are respectively sleeved on the two guide rods (7).

4. The cylinder-driven linear guide mechanism according to claim 1, characterized by: The linear bearing housing (3) is connected to the front end of the piston rod of the cylinder (11) through the cylinder pusher housing (9) and the cylinder pusher (8).

5. The cylinder-driven linear guide mechanism according to claim 1, characterized in that: The pusher (1) is detachably installed on the linear bearing housing (3) by means of threaded connection or pin connection.

6. The cylinder-driven linear guide mechanism according to claim 2, characterized in that: The bushing (5) is made of a self-lubricating material.

7. The cylinder-driven linear guide mechanism according to claim 1, characterized by: The frame (12) is equipped with a sensor for detecting the stroke position of the linear bearing housing (3).

8. The cylinder-driven linear guide mechanism according to claim 3, characterized in that: The plane containing the axes of the two guide rods (7) is coplanar with the axis of the cylinder (11).

9. The cylinder-driven linear guide mechanism according to claim 1, characterized by: The working end face of the pusher (1) is provided with a buffer pad.

10. The cylinder-driven linear guide mechanism according to claim 1, characterized by: The cylinder (11) is a double-rod cylinder or a cylinder with a guide rod.

Images