Connecting mechanism of tension-torsion composite oil cylinder

Abstract

The utility model relates to the field of oil cylinders, and discloses a connecting mechanism of a tension-torsion composite oil cylinder, which comprises a rear cylinder cover of a linear cylinder, a connecting outer barrel is detachably mounted on the outer side of the rear cylinder cover of the linear cylinder through a screw, and a front cylinder cover of a swing cylinder is detachably mounted at one end, far away from the rear cylinder cover of the linear cylinder, of the connecting outer barrel through a screw. A displacement sensor sleeve is detachably installed on the right side of the connecting outer barrel through a screw, a guide fixing barrel is detachably installed on the surface of the right side of the connecting outer barrel through a screw, a guide hole is formed in the surface of the guide fixing barrel, and a swing cylinder flange shaft is detachably installed on the right side of a connecting sleeve through a screw. According to the utility model, the connecting mechanism not only can bear the torque transmitted by the oscillating cylinder and generate no gap in the zero-crossing-point oscillating process, but also can measure the displacement of the piston rod, and is suitable for the field of tension-torsion composite fatigue tests of materials and parts thereof, and the blockage of the connecting mechanism to the linear motion of the piston rod is small.

Description

Technical Field

[0001] The utility model relates to the field of oil cylinders, in particular to a connecting mechanism of a tension-torsion composite oil cylinder. Background Art

[0002] A tension-torsion composite cylinder is a pneumatic or hydraulic component used to achieve various modes of movement. It is widely used in mechanical engineering and automation equipment. As a key device that can simultaneously output tension and torque, the tension-torsion composite cylinder plays an important role in many complex working conditions.

[0003] However, to achieve efficient and stable operation of the tension-torsion composite cylinder, the design of its connection mechanism is crucial.

[0004] At present, the servo cylinders on the market can perform tension and compression tests or torsion tests on materials and components separately, but cannot perform tension and torsion composite tests on materials and components at the same time. In view of the working conditions of tension and torsion composite tests on materials and components, a connection mechanism of tension and torsion composite cylinder is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a connection mechanism of a tension-torsion composite oil cylinder, aiming to improve the problem in the prior art that it is impossible to simultaneously perform tension-torsion composite tests on materials and their components.

[0006] The cam is fixedly mounted on a rear portion of the cylinder and is adapted to engage said guide rail, and the cam is adapted to engage said guide rail when said rail is in said engagement.

[0007] As a further description of the above technical solution:

[0008] A rolling bearing is provided between the linear cylinder piston rod and the guide plate.

[0009] As a further description of the above technical solution:

[0010] A displacement sensor core rod is detachably mounted on the outer surface of the guide plate via screws.

[0011] As a further description of the above technical solution:

[0012] The guide plate is slidably connected to the inner wall of the outer cylinder

[0013] As a further description of the above technical solution:

[0014] The connecting sleeve is fixedly connected to the spline sub-center shaft via an expansion sleeve.

[0015] As a further description of the above technical solution:

[0016] The outer wall of the displacement sensor core rod is slidably connected with a displacement sensor sleeve.

[0017] As a further description of the above technical solution:

[0018] The surface of the rolling bearing contacts a bearing cover, and the bearing cover is fixedly connected to the inner wall of the connecting outer cylinder through a spline pair fixing flange.

[0019] As a further description of the above technical solution:

[0020] The displacement sensor sleeve is fixedly connected to the right side of the inner wall of the outer cylinder.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, this connecting mechanism can not only withstand the torque transmitted by the swing cylinder, but also has no gap during the zero-point swing process. This connecting mechanism has little obstruction to the linear motion of the piston rod and can also measure the displacement of the piston rod. It is suitable for the field of tension-torsion composite fatigue testing of materials and their components.

[0023] 2. In the present invention, the design of rolling bearings, guide rods, guide plates and other components allows for precise positioning of the displacement sensor, ensuring the accuracy and reliability of displacement measurement. At the same time, the detachable connection method and reasonable structural design make the connection mechanism easy to install, disassemble and maintain, reducing maintenance costs and improving the maintainability and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a connection mechanism of a tension-torsion composite oil cylinder proposed in the present invention;

[0025] Figure 2 This is a schematic diagram of the overall top view and cross-section of the connecting mechanism of a tension-torsion composite oil cylinder proposed in the present invention;

[0026] Figure 3 This is a schematic diagram of the main structure of a connection mechanism of a tension-torsion composite oil cylinder proposed in the present invention;

[0027] Figure 4 This is a partial cross-sectional structural diagram of the connecting outer cylinder of a connecting mechanism of a tension-torsion composite oil cylinder proposed in the present invention.

[0028] Legend:

[0029] 1. Rear cylinder cover of linear cylinder; 2. Connecting outer cylinder; 3. Guide plate; 4. Guide rod; 5. Guide fixing cylinder; 6. Piston rod of linear cylinder; 7. Rolling bearing; 8. Bearing gland; 9. Spline pair fixing flange; 10. Spline pair center shaft; 11. Expansion sleeve; 12. Connecting sleeve; 13. Swing cylinder flange shaft; 14. Swing cylinder front cylinder cover; 15. Displacement sensor sleeve; 16. Displacement sensor core rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1-Figure 3 The utility model provides an embodiment: a connection mechanism of a tension-torsion composite oil cylinder, including a linear cylinder rear cylinder cover 1, the outer side of the linear cylinder rear cylinder cover 1 is detachably mounted with a connecting outer cylinder 2 by screws, the end of the connecting outer cylinder 2 away from the linear cylinder rear cylinder cover 1 is detachably mounted with a swing cylinder front cylinder cover 14 by screws, the right side of the connecting outer cylinder 2 is detachably mounted with a displacement sensor sleeve 15 by screws, the right side surface of the connecting outer cylinder 2 is detachably mounted with a guide fixing cylinder 5 by screws, the surface of the guide fixing cylinder 5 is provided with a guide hole, the inner wall of the guide hole of the guide fixing cylinder 5 is penetrated and slidably connected with a guide rod 4, the guide rod 4 moves along the inner hole of the guide fixing cylinder 5 with low friction to prevent the linear cylinder piston rod 6 from rotating and damaging the displacement sensor core rod 16.

[0032] Reference Figure 2-Figure 4The guide plate 3 is detachably mounted on the end of the guide rod 4 away from the guide fixing cylinder 5 through a screw. The inner surface of the guide fixing cylinder 5 is coated, and the outer surface of the guide plate 3 is plated, with a low friction coefficient. When the linear cylinder piston rod 6 moves axially, the friction force it is subjected to is small. The guide plate 3 is slidably connected to the inner wall of the connecting outer cylinder 2. The outer surface of the guide plate 3 is detachably mounted with a displacement sensor core rod 16 through a screw. When the linear cylinder piston rod 6 moves, the displacement sensor core rod 16 is driven to move to measure the displacement of the piston rod. The displacement sensor of this tension-torsion composite oil cylinder consists of a displacement sensor sleeve 15 and a displacement sensor core rod 16 and is not coaxially installed with the linear cylinder piston rod 6, so the displacement sensor needs to be positioned in the swinging direction and is installed between the linear cylinder piston rod 6 and the guide rod 4 using a rolling bearing 7.

[0033] Reference Figure 2-Figure 4 The outer wall of the displacement sensor core rod 16 is slidably connected to the displacement sensor sleeve 15, and the displacement sensor sleeve 15 is fixedly connected to the right side of the inner wall of the outer tube 2. The displacement sensor core rod 16 is installed in the displacement sensor sleeve 15. Because of the presence of the guide, the linear cylinder piston rod 6 will not deflect when driving the displacement sensor core rod 16 to move, thereby protecting the displacement sensor composed of the displacement sensor sleeve 15 and the displacement sensor core rod 16 from damage. The inner wall of the outer tube 2 is slidably connected to the linear cylinder piston rod 6. A rolling bearing 7 is provided between the linear cylinder piston rod 6 and the guide plate 3. The outer wall of the linear cylinder piston rod 6 is detachably mounted with a spline pair fixing flange 9 by screws. The surface of the rolling bearing 7 is in contact with a bearing cover 8, the spline pair fixing flange 9 fixes the inner ring of the rolling bearing 7, and the bearing cover 8 fixes the outer ring of the rolling bearing 7. The bearing cover 8 is fixedly connected to the inner wall of the connecting outer cylinder 2 through the spline pair fixing flange 9. When the swing cylinder is working, the swing cylinder flange shaft 13 swings to output positive torque, and the connecting outer cylinder 2 bears reverse torque. The spline pair fixing flange 9 and the spline pair center shaft 10 can achieve swinging without gap and low-friction linear motion. The inner wall of the connecting outer cylinder 2 is fixedly connected with a connecting sleeve 12, and the right side of the connecting sleeve 12 is detachably installed with a swing cylinder flange shaft 13 by screws. The connecting sleeve 12 is fixedly connected to the spline pair center shaft 10 through a tightening sleeve 11.

[0034] Working Principle: The front-end linear cylinder is the key device for outputting tension and compression, while the rear-end swing cylinder is responsible for outputting torsional force. Through the ingenious design of integrating the linear and swing cylinders, the linear cylinder piston rod 6 can simultaneously and efficiently output tension and torsional force, greatly expanding its application range and functions.

[0035] When the swing cylinder starts working, the swing cylinder flange shaft 13 will swing left and right regularly, thereby swinging and outputting positive torque. At this time, the fixed end composed of the rear cylinder head 1 of the linear cylinder, the connecting outer cylinder 2 and the front cylinder head 14 of the swing cylinder takes on the important task of bearing the reverse torque. The positive torque output by the swing cylinder passes through the connecting sleeve 12, the expansion sleeve 11, the spline sub-center shaft 10 and the spline sub-fixing flange 9 in sequence, and is finally accurately transmitted to the linear cylinder piston rod 6. The working principle between the spline sub-center shaft 10 and the spline sub-fixing flange 9 is unique. On the one hand, they cannot swing left and right, ensuring the stability of torque transmission; on the other hand, they can move axially forward and backward, thereby achieving gapless swing and low-friction linear motion, greatly improving the working efficiency and precision of the entire device.

[0036] The displacement sensor sleeve 15 and the displacement sensor core rod 16 of the tension-torsion composite oil cylinder are not coaxially installed with the linear cylinder piston rod 6, which requires precise positioning of the displacement sensor in the swing direction. For this purpose, a rolling bearing 7 is installed between the linear cylinder piston rod 6 and the guide plate 3. The spline pair fixing flange 9 firmly fixes the inner ring of the rolling bearing 7, while the bearing cover 8 stably fixes the outer ring of the rolling bearing 7. The guide plate 3 is tightly connected to the guide rod 4 by screws, and the guide fixing cylinder 5 is reliably connected to the connecting outer cylinder 2 by screws. The guide rod 4 is installed in the guide fixing cylinder 5, and the inner surface of the guide fixing cylinder 5 is treated with advanced coating, and the outer surface of the guide rod 4 is treated with high-quality plating. This design makes the friction coefficient between the two extremely low. When the linear cylinder piston rod 6 moves axially, the friction force it is subjected to is very small, thereby ensuring the smoothness and precision of the piston rod movement.

[0037] The displacement sensor consists of a displacement sensor sleeve 15 and a displacement sensor core rod 16. As the displacement sensor core rod 16 moves axially along the displacement sensor sleeve 15, it acquires real-time data on the displacement of the linear cylinder piston rod 6. The displacement sensor sleeve 15 is securely connected to the connecting outer cylinder 2 via screws, while the displacement sensor core rod 16 is tightly screwed to the guide plate 3. The displacement sensor core rod 16 is mounted within the displacement sensor sleeve 15. This guide prevents any deflection of the displacement sensor core rod 16 when it is driven by the linear cylinder piston rod 6, effectively protecting the displacement sensor from damage and ensuring accurate and reliable displacement measurement.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A connecting mechanism for a tension-torsion composite oil cylinder, comprising a linear cylinder rear cylinder cover (1), characterized in that: The outer side of the linear cylinder rear cylinder cover (1) is detachably mounted with a connecting outer cylinder (2) by means of screws, and the end of the connecting outer cylinder (2) away from the linear cylinder rear cylinder cover (1) is detachably mounted with a swing cylinder front cylinder cover (14) by means of screws, and the right side of the connecting outer cylinder (2) is detachably mounted with a displacement sensor sleeve (15) by means of screws, and the right side surface of the connecting outer cylinder (2) is detachably mounted with a guide fixing cylinder (5) by means of screws, and a guide hole is provided on the surface of the guide fixing cylinder (5), and the guide hole of the guide fixing cylinder (5) is The inner wall of the connecting outer cylinder (2) is penetrated by and slidably connected to a guide rod (4), and the end of the guide rod (4) away from the guide fixing cylinder (5) is detachably mounted with a guide plate (3) by means of screws. The inner wall of the connecting outer cylinder (2) is slidably connected to a linear cylinder piston rod (6), and the outer wall of the linear cylinder piston rod (6) is detachably mounted with a spline pair fixing flange (9) by means of screws. The inner wall of the connecting outer cylinder (2) is fixedly connected to a connecting sleeve (12), and a swing cylinder flange shaft (13) is detachably mounted on the right side of the connecting sleeve (12) by means of screws.

2. The connection mechanism of the tension-torsion composite oil cylinder according to claim 1, characterized in that: A rolling bearing (7) is provided between the linear cylinder piston rod (6) and the guide plate (3).

3. The connection mechanism of the tension-torsion composite oil cylinder according to claim 1, characterized in that: A displacement sensor core rod (16) is detachably mounted on the outer surface of the guide plate (3) via screws.

4. The connection mechanism of the tension-torsion composite oil cylinder according to claim 1, characterized in that: The guide plate (3) is slidably connected to the inner wall of the outer cylinder (2).

5. The connection mechanism of the tension-torsion composite oil cylinder according to claim 1, characterized in that: The connecting sleeve (12) is fixedly connected to the spline sub-center shaft (10) via the expansion sleeve (11).

6. The connection mechanism of the tension-torsion composite oil cylinder according to claim 3, characterized in that: The outer wall of the displacement sensor core rod (16) is slidably connected to a displacement sensor sleeve (15).

7. The connection mechanism of the tension-torsion composite oil cylinder according to claim 2, characterized in that: The surface of the rolling bearing (7) is in contact with a bearing cover (8), and the bearing cover (8) is fixedly connected to the inner wall of the connecting outer cylinder (2) via a spline pair fixing flange (9).

8. The connection mechanism of the tension-torsion composite oil cylinder according to claim 5, characterized in that: The displacement sensor sleeve (15) is fixedly connected to the right side of the inner wall of the connecting outer cylinder (2).

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