Automatic centering clamp for turning oil cylinder piston rod

Abstract

The automatic centering clamp comprises a base, a chuck and a centering adjusting assembly, a supporting plate is welded to the upper side of the base, the chuck is fixed to the upper side of the supporting plate, a hollow groove is formed in the middle of the chuck, a bevel gear ring is rotationally installed on the outer edge of the chuck, and the centering adjusting assembly is fixed to the lower side of the hollow groove. And one side of the bevel gear ring is meshed with bevel gears, the number of the bevel gears is three, a centering adjusting assembly is installed on one side of each bevel gear, and each centering adjusting assembly comprises a lead screw, a movable sleeve and a connecting block. By arranging the bevel gear ring, the bevel gear and the centering adjusting assembly, the driving gear drives the inner gear ring and the bevel gear ring to rotate, and then the moving sleeve, the connecting block and the positioning plates of the centering adjusting assembly are driven to move, so that rubber blocks at the ends of the three positioning plates can be attached to the outer side face of an oil cylinder piston rod to clamp and position the oil cylinder piston rod; and automatic centering during machining of oil cylinder piston rods of different sizes is achieved.

Description

An automatic centering fixture for turning hydraulic cylinder piston rods Technical Field

[0001] This utility model relates to the field of piston rod processing technology, specifically an automatic centering fixture for turning hydraulic cylinder piston rods. Background Technology

[0002] A hydraulic cylinder is a device that converts hydraulic energy into mechanical energy. The piston rod of a hydraulic cylinder is a key connecting component in a hydraulic cylinder or pneumatic cylinder that supports the piston to do work. Its core function is to transmit power and realize linear reciprocating motion. When the piston rod of a hydraulic cylinder is machined, a corresponding fixture is required.

[0003] Patent 201920929943.0 discloses a piston rod clamp. Similar piston rod clamps to the above patent still have the following shortcomings: Although they can clamp and position the piston rod, the center position of piston rods of different diameters is different after clamping, which makes it more troublesome to find the center of the piston rod during subsequent cutting.

[0004] In view of this, we have studied and improved the existing structure and its shortcomings, and proposed an automatic centering fixture for turning hydraulic cylinder piston rods. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this utility model is to provide an automatic centering fixture for turning hydraulic cylinder piston rods.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic centering fixture for machining hydraulic cylinder piston rods, comprising a base, a chuck, and a centering adjustment assembly. A support plate is welded to the upper side of the base, and a chuck is fixed to the upper side of the support plate. A hollow groove is formed in the middle of the chuck, and a bevel gear ring is rotatably mounted on the outer edge of the chuck. A bevel gear is meshed on one side of the bevel gear ring, and three bevel gears are evenly arranged. A centering adjustment assembly is mounted on one side of the bevel gears. The centering adjustment assembly comprises a lead screw, a movable sleeve, and a connecting block. The lead screw and the bevel gear are fixedly connected, and a movable sleeve is sleeved on the outer side of the lead screw. A connecting block is fixed to the front side of the movable sleeve, and a positioning plate is fixed to the outer side of the connecting block. A rubber block is fixed to the bottom surface of the positioning plate, and the bottom surface of the rubber block has an arc-shaped structure.

[0007] Furthermore, a rotating shaft is fixed to the top of the bevel gear, and a limiting collar is fixed to the outer side of the chuck via a fixing plate, and the limiting collar is rotatably connected to the rotating shaft via a bearing.

[0008] Furthermore, the centering adjustment component also includes a sliding block, which is fixed to the rear side of the movable sleeve, and the sliding block has a T-shaped structure.

[0009] Furthermore, the centering adjustment component also includes a limiting groove, the surface of the chuck is provided with a limiting groove, and the limiting groove is slidably connected to the sliding block.

[0010] Furthermore, an internal gear ring is fixed to the inner wall of the bevel gear ring, and a drive gear is rotatably mounted on one side of the chuck via a motor shaft, the drive gear being meshed with the internal gear ring.

[0011] Furthermore, side plates are fixed on both sides of the upper part of the base, and electric telescopic rods are installed on the inner side of the side plates. A flexible limiting plate is fixed to one end of the electric telescopic rod, and the flexible limiting plate is slidably connected to the base.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. It is equipped with a bevel ring and bevel gears. The hollow groove is used to set the piston rod of the hydraulic cylinder to be clamped. The motor drives the drive gear to rotate. The drive gear is meshed with the internal gear ring to facilitate the rotation of the internal gear ring and the bevel ring. This causes the bevel ring to drive the rotation of three bevel gears. The rotating shaft of the bevel gear is rotatably connected to the limiting sleeve through the bearing, so that the limiting sleeve can limit its rotation. This allows the three sets of bevel gears and the lead screw to rotate stably at the same time.

[0014] 2. A centering adjustment component is provided. The rotation of the lead screw facilitates the movement of the outer movable sleeve. Since the sliding block on the rear side of the movable sleeve slides in the limiting groove on the chuck surface, the movable sleeve can move towards or away from the center line of the hollow groove, thereby driving the movement of the connecting block and the positioning plate. This allows the rubber blocks at the ends of the three positioning plates to fit against the outer side of the cylinder piston rod for clamping and positioning, achieving automatic centering during the processing of cylinder piston rods of different sizes. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the structure of this utility model;

[0016] Figure 2 is an enlarged view of point A in Figure 1;

[0017] Figure 3 is a schematic diagram of the positioning adjustment component of this utility model;

[0018] Figure 4 is a side view of the present invention.

[0019] In the diagram: 1. Base; 2. Support plate; 3. Chuck; 4. Hollow groove; 5. Bevel gear ring; 6. Bevel gear; 7. Rotating shaft; 8. Fixing plate; 9. Limiting collar; 10. Centering adjustment assembly; 1001. Lead screw; 1002. Moving sleeve; 1003. Sliding block; 1004. Limiting slide groove; 1005. Connecting block; 11. Positioning plate; 12. Rubber block; 13. Internal gear ring; 14. Motor shaft; 15. Drive gear; 16. Side plate; 17. Electric telescopic rod; 18. Flexible limiting plate. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] As shown in Figures 1 and 4, an automatic centering fixture for machining a hydraulic cylinder piston rod according to this embodiment includes a base 1, a chuck 3, and a centering adjustment assembly 10. A support plate 2 is welded to the upper side of the base 1, and the chuck 3 is fixed to the upper side of the support plate 2. A hollow groove 4 is opened in the middle of the chuck 3, and a bevel gear ring 5 is rotatably installed on the outer edge of the chuck 3. A bevel gear 6 is meshed on one side of the bevel gear ring 5, and three bevel gears 6 are evenly arranged. A rotating shaft 7 is fixed to the top of the bevel gear 6. A limiting sleeve 9 is fixed to the outer side of the chuck 3 through a fixing plate 8, and the limiting sleeve 9 is rotatably connected to the rotating shaft 7 through a bearing. An internal gear ring 13 is fixed to the inner wall of the bevel gear ring 5. A drive gear 15 is rotatably installed on one side of the chuck 3 through a motor shaft 14, and the drive gear 15 is meshed with the internal gear ring 13.

[0022] Specifically, a micro motor is externally connected to the motor shaft 14. The interior of the hollow slot 4 is used to place the piston rod of the hydraulic cylinder to be clamped. The micro motor drives the drive gear 15 to rotate through the motor shaft 14. The drive gear 15 is meshed with the internal gear ring 13 to facilitate the rotation of the internal gear ring 13 and the bevel gear ring 5. In turn, the bevel gear ring 5 drives the three bevel gears 6 to rotate. The rotating shaft 7 of the bevel gear 6 is rotatably connected to the limiting sleeve 9 through the bearing, so that the limiting sleeve 9 can limit it. In this way, the three sets of bevel gears 6 and the lead screw 1001 can rotate stably at the same time.

[0023] As shown in Figures 2 and 3, a centering adjustment assembly 10 is installed on one side of the bevel gear 6. The centering adjustment assembly 10 includes a lead screw 1001, a movable sleeve 1002, and a connecting block 1005. The lead screw 1001 is fixedly connected to the bevel gear 6, and the movable sleeve 1002 is sleeved on the outer side of the lead screw 1001. The connecting block 1005 is fixed to the front side of the movable sleeve 1002, and a positioning plate 11 is fixed to the outer side of the connecting block 1005. A rubber block 12 is fixed to the bottom surface of the positioning plate 11, and the bottom surface of the rubber block 12 has an arc-shaped structure. The centering adjustment assembly 10 also includes... The system includes a sliding block 1003, which is fixed to the rear side of the movable sleeve 1002. The sliding block 1003 has a T-shaped structure. The centering adjustment assembly 10 also includes a limiting groove 1004. The limiting groove 1004 is opened on the surface of the chuck 3, and the limiting groove 1004 is slidably connected to the sliding block 1003. Side plates 16 are fixed on both sides of the upper part of the base 1, and an electric telescopic rod 17 is installed on the inner side of the side plate 16. A flexible limiting plate 18 is fixed to one end of the electric telescopic rod 17, and the flexible limiting plate 18 is slidably connected to the base 1.

[0024] Specifically, the rotation of the lead screw 1001 facilitates the movement of the outer movable sleeve 1002. Since the sliding block 1003 on the rear side of the movable sleeve 1002 slides in the limiting groove 1004 on the surface of the chuck 3, the movable sleeve 1002 can move towards or away from the center line of the hollow groove 4, thereby driving the movement of the connecting block 1005 and the positioning plate 11. This allows the rubber blocks 12 at the ends of the three positioning plates 11 to fit against the outside of the cylinder piston rod and clamp and position it. By adjustment, automatic centering of cylinder piston rods of different sizes can be achieved. The extension and retraction of the electric telescopic rod 17 facilitates the movement of the flexible limiting plate 18, allowing the two flexible limiting plates 18 to further flexibly limit the outer sides of the cylinder piston rod to improve clamping stability.

[0025] Working principle: In use, the piston rod of the hydraulic cylinder is first placed in the hollow groove 4 of the chuck 3. A micro motor is connected to the external motor shaft 14. The micro motor drives the drive gear 15 to rotate through the motor shaft 14. The drive gear 15 is meshed with the internal gear ring 13, which drives the internal gear ring 13 and the bevel gear ring 5 to rotate. In turn, the bevel gear ring 5 drives the three bevel gears 6 to rotate. The rotating shaft 7 of the bevel gear 6 is rotatably connected to the limiting sleeve 9 through the bearing, so that the limiting sleeve 9 can limit it. This allows the bevel gear 6 and the lead screw 1001 to rotate stably. Then, the rotation of the lead screw 1001 drives the movement of the outer movable sleeve 1002. Since the sliding block 1003 on the rear side of the movable sleeve 1002 is in the chuck... The limiting slide in the limiting groove 1004 on the surface of the cylinder allows the moving sleeve 1002 to move towards the center line of the hollow groove 4, thereby driving the connecting block 1005 and the positioning plate 11 to move. This allows the rubber blocks 12 at the ends of the three positioning plates 11 to fit against the outside of the cylinder piston rod and clamp and position it. By adjustment, the cylinder piston rod of different sizes can be automatically centered. Finally, the extension and retraction of the electric telescopic rod 17 can drive the movement of the flexible limiting plate 18, so that the two flexible limiting plates 18 can further flexibly limit the outer sides of the cylinder piston rod to improve the clamping stability. This completes the use process of the automatic centering fixture for turning cylinder piston rod.

[0026] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An automatic centering fixture for turning hydraulic cylinder piston rods, comprising a base (1), a chuck (3), and a centering adjustment assembly (10), characterized in that, A support plate (2) is welded to the upper side of the base (1), and a chuck (3) is fixed to the upper side of the support plate (2). A hollow groove (4) is opened in the middle of the chuck (3), and a bevel gear ring (5) is rotatably installed on the outer edge of the chuck (3). A bevel gear (6) is meshed on one side of the bevel gear ring (5), and three bevel gears (6) are evenly arranged. A centering adjustment assembly (10) is installed on one side of the bevel gear (6). The centering adjustment assembly (10) includes a lead screw (100). 1) Movable sleeve (1002) and connecting block (1005), the lead screw (1001) and bevel gear (6) are fixedly connected, and the movable sleeve (1002) is sleeved on the outside of the lead screw (1001). The connecting block (1005) is fixed on the front side of the movable sleeve (1002), and the positioning plate (11) is fixed on the outside of the connecting block (1005). The bottom surface of the positioning plate (11) is fixed with a rubber block (12), and the bottom surface of the rubber block (12) is an arc-shaped structure.

2. The automatic centering fixture for machining a hydraulic cylinder piston rod according to claim 1, characterized in that, The top of the bevel gear (6) is fixed with a rotating shaft (7), and the outer side of the chuck (3) is fixed with a limiting collar (9) by a fixing plate (8), and the limiting collar (9) is rotatably connected to the rotating shaft (7) by a bearing.

3. The automatic centering fixture for machining a hydraulic cylinder piston rod according to claim 2, characterized in that, The centering adjustment component (10) also includes a sliding block (1003), which is fixed to the rear side of the movable sleeve (1002), and the sliding block (1003) has a T-shaped structure.

4. The automatic centering fixture for turning hydraulic cylinder piston rods according to claim 3, characterized in that, The centering adjustment component (10) also includes a limiting groove (1004), the surface of the chuck (3) is provided with a limiting groove (1004), and the limiting groove (1004) and the sliding block (1003) are slidably connected.

5. The automatic centering fixture for machining a hydraulic cylinder piston rod according to claim 4, characterized in that, The inner wall of the bevel ring (5) is fixed with an internal gear ring (13), and a drive gear (15) is rotatably mounted on one side of the chuck (3) via a motor shaft (14). The drive gear (15) and the internal gear ring (13) are meshed together.

6. The automatic centering fixture for turning hydraulic cylinder piston rods according to claim 1, characterized in that, The base (1) has side plates (16) fixed on both sides above, and an electric telescopic rod (17) is installed on the inner side of the side plate (16). A flexible limiting plate (18) is fixed at one end of the electric telescopic rod (17), and the flexible limiting plate (18) is slidably connected to the base (1).

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