Positioning tool for bearing ring machining

Abstract

The utility model relates to bearing ring machining field especially relates to a kind of positioning tool for bearing ring machining, the side of base is equipped with cylinder, multiple clamping jaws are rotatably installed outside cylinder, the bottom of each clamping jaw is rotatably connected with movable plate by connecting rod, movable plate middle part is connected with screw rod, screw rod is driven connection with worm gear mechanism and realizes axial rotary motion.The utility model in the present application, worm gear mechanism drives screw rod to drive movable plate displacement, and multiple connecting rod mechanisms on movable plate drive multiple sets of clamping jaws to carry out clamping action to realize the stable, uniform clamping of the outer ring of bearing ring, and by loosening fastening bolt and adjusting the clamping head on turnover clamping jaw, the clamping surface of clamping jaw can be quickly changed, so as to realize the supporting positioning effect of the inner ring of bearing ring, realize double-sided positioning function, meet the processing demand, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bearing ring processing technology, and in particular to a positioning fixture for bearing ring processing. Background Technology

[0002] The bearing ring is the core component of a rolling bearing, consisting of an inner ring and an outer ring. The inner ring is usually tightly fitted to the shaft and rotates with it; the outer ring fits into the bearing housing or housing bore and provides support. Together, they form the raceway, guiding the movement of the rolling elements and reducing friction.

[0003] In the machining process of bearing rings, positioning fixtures are often required to ensure the stability of the machining process. Traditional positioning devices mostly rely on lead screw clamps to clamp the two sides of the bearing ring. In practical applications, such devices apply a relatively concentrated clamping force to the outer wall of the bearing ring, which can easily damage the ring. At the same time, they cannot clamp the inner wall of the bearing ring, thus failing to meet the machining requirements. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a positioning fixture for machining bearing rings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A positioning fixture for machining bearing rings includes a base, a cylindrical body is mounted on one side of the base, and multiple grippers are rotatably mounted on the outer side of the cylindrical body. The bottom of each gripper is rotatably connected to a movable plate via a connecting rod. The middle of the movable plate is connected to a lead screw, and the lead screw is driven by a worm gear mechanism to achieve axial rotational movement.

[0007] One end of the gripper is provided with a gripping head, and a fastening bolt is screwed into the middle of the gripping head. The fastening bolt passes through the bushing provided in the middle of the gripping head and is screwed into the gripper. A pair of rubber pillars are provided on the side of the gripping head facing the gripper, and the rubber pillars are limited and locked in the limiting holes opened on the outer wall of the gripper.

[0008] Furthermore, a preferred structure is that the worm gear mechanism includes a worm and a worm wheel. The worm is rotatably mounted on the outer side of the base via a bearing component. One end of the worm extends into the base and meshes with the worm wheel. One end of the worm wheel is rotatably mounted inside the base via a support disc.

[0009] In addition, a preferred structure is that one end of the support plate extends into the cylinder, and multiple support seats are installed on the support plate. The support seats are rotatably connected to the connecting rod via pins, and the other end of the connecting rod is rotatably connected to the bottom of the gripper via pins.

[0010] In addition, a preferred structure is that a limiting groove is provided inside the cylinder to limit the installation of the movable plate, and the movable plate achieves horizontal linear movement through the limiting groove.

[0011] In addition, a preferred structure is that a lead screw is fixedly installed in the middle of the support plate, one end of the lead screw is screwed to the middle of the movable plate, and the lead screw passes through the movable plate and extends into the dust cover provided on the outside of the movable plate.

[0012] In addition, a preferred structure is that a connecting hole is provided in the middle of one end of the gripper for screwing in a fastening bolt, and limit holes are symmetrically provided on both sides away from the connecting hole. The limit holes are used to connect with the rubber column.

[0013] The beneficial effects of this utility model are as follows:

[0014] In this invention, a worm gear mechanism drives a lead screw to move a movable plate, and multiple linkage mechanisms on the movable plate drive multiple sets of grippers to perform clamping actions, thereby achieving multi-faceted stable and uniform clamping of the outer ring of the bearing ring. Furthermore, by loosening the fastening bolts and adjusting the clamping heads on the flipping grippers, the clamping surface of the grippers can be quickly changed, thereby achieving the top support and positioning effect of the inner ring of the bearing ring, realizing a double-sided positioning function, meeting processing requirements, and improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of a positioning fixture for machining bearing rings according to this utility model.

[0016] Figure 2 This is a cross-sectional view of the internal structure of a positioning fixture for machining bearing rings proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the cylinder proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the movable plate connection structure proposed in this utility model;

[0019] Figure 5 Schematic diagram of the external structure of the gripper proposed in this utility model Figure 1 ;

[0020] Figure 6 Schematic diagram of the external structure of the gripper proposed in this utility model Figure 2 ;

[0021] Figure 7 This is an exploded view of the clamping head connection structure proposed in this utility model;

[0022] Figure 8 This is a schematic diagram of the clamping head structure proposed in this utility model.

[0023] In the diagram: 1. Base; 11. Worm; 12. Worm Gear; 13. Lead Screw; 14. Dust Cover; 2. Cylinder; 3. Gripper; 31. Connecting Rod; 4. Grip Head; 5. Movable Plate; 51. Support Base; 6. Limiting Groove; 7. Support Plate; 8. Fastening Bolt; 81. Rubber Column; 9. Limiting Hole; 91. Connecting Hole; 10. Bushing. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figure 1-8 A positioning fixture for processing bearing rings includes a base 1, a cylindrical body 2 is installed on one side of the base 1, and multiple grippers 3 are rotatably installed on the outer side of the cylindrical body 2. The bottom of each gripper 3 is rotatably connected to a movable plate 5 through a connecting rod 31. The middle part of the movable plate 5 is connected to a lead screw 13, and the lead screw 13 is driven by a worm gear mechanism to achieve axial rotational movement.

[0026] The lead screw 13 drives the movable plate 5 to move horizontally, and the connecting rod 31 connected to the movable plate 5 converts the horizontal displacement into the rotational displacement of the gripper 3.

[0027] One end of the gripper 3 is provided with a gripping head 4, and a fastening bolt 8 is screwed into the middle of the gripping head 4. The fastening bolt 8 passes through the bushing 10 provided in the middle of the gripping head 4 and is screwed into the gripper 3. A pair of rubber pillars 81 are provided on the side of the gripping head 4 facing the gripper 3. The rubber pillars 81 are limited and snapped into the limiting hole 9 opened on the outer wall of the gripper 3.

[0028] The worm gear mechanism includes a worm 11 and a worm wheel 12. The worm 11 is rotatably mounted on the outer side of the base 1 via a bearing component. One end of the worm 11 extends into the interior of the base 1 and meshes with the worm wheel 12. The middle part of one end of the worm wheel 12 is rotatably mounted inside the base 1 via a support plate 7.

[0029] The support plate 7 is rotatably mounted in the middle of the base 1 via bearing components.

[0030] One end of the support plate 7 extends into the cylinder 2, and multiple support seats 51 are installed on the support plate 7. The support seats 51 are rotatably connected to the connecting rod 31 through a pin, and the other end of the connecting rod 31 is rotatably connected to the bottom of the gripper 3 through a pin.

[0031] A limiting groove 6 is provided inside the cylinder 2 to limit the installation of the movable plate 5. The movable plate 5 achieves horizontal linear movement through the limiting groove 6.

[0032] The movable plate 5 has multiple protrusions on its exterior to fit into the limiting groove 6.

[0033] A lead screw 13 is fixedly installed in the middle of the support plate 7. One end of the lead screw 13 is screwed to the middle of the movable plate 5, passes through the movable plate 5, and extends into the dust cover 14 set on the outside of the movable plate 5.

[0034] A connecting hole 91 is provided at the middle of one end of the gripper 3 to screw in the bolt 8. Limiting holes 9 are symmetrically provided on both sides away from the connecting hole 91. The limiting holes 9 are used to connect the rubber column 81.

[0035] The clamping head 4 has a through hole in the middle, and a bushing 10 is installed in the through hole. A fastening bolt 8 passes through the bushing 10. When the fastening bolt 8 is rotated and tightened in the connecting hole 91, the fastening bolt 8 presses against the outer wall of the clamping head 4.

[0036] The worm gear 11 extends out of the base 1 and is mounted on a rocker arm.

[0037] In this embodiment, the worm gear 11 on the side of the rotating base 1 rotates, and the worm gear 11 rotates to drive the meshing worm wheel 12 to rotate. The worm wheel 12 synchronously supports the disk 7 and the lead screw 13 to rotate axially, and the screw 13 drives the movable plate 5 to generate horizontal displacement under the threaded rotation. At the same time, the movable plate 5 drives one end of the connecting rod 31 to generate displacement and deflection. Simultaneously, the other end of the connecting rod 31, that is, the bottom end of the gripper 3, generates displacement. In this way, the horizontal displacement of the movable plate 5 is converted into the rotational displacement of the gripper 3, thereby driving multiple grippers 3 to perform synchronous rotational clamping action. Compared with the traditional device, the structure of multiple grippers 3 achieves multiple clamping surfaces, ensuring the uniformity of clamping force and ensuring the processing stability of the bearing ring.

[0038] Furthermore, when it is necessary to clamp the inner ring of the bearing ring, by loosening the fastening bolts 8 at the end of each jaw 3, the fastening bolts 8 rotate and displace and disengage from the outer wall of the clamping head 4. At this time, the clamping head 4 can be adjusted to a certain extent in terms of free horizontal and rotational movement. By flipping the clamping head 4 180° so that its clamping surface faces outward, the rubber pillar 81 on the inner side of the clamping head 4 is aligned with the limiting hole 9 opened at the end of the jaw 3, and the fastening bolts 8 are tightened again, so that the fastening bolts 8 and the connecting hole 91 opened at the end of the jaw 3 are screwed together. Under the action of thread rotation, the fastening bolts 8 press the clamping head 4, so that the rubber pillar 81 and the connecting hole 91 are squeezed against each other to ensure tight connection.

[0039] The flipped gripper head 4 can support the inner wall of the bearing ring to achieve positioning when the gripper 3 rotates and unfolds.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A positioning fixture for machining bearing rings, comprising a base (1), characterized in that, A cylindrical body (2) is installed on one side of the base (1). Multiple grippers (3) are rotatably installed on the outer side of the cylindrical body (2). The bottom of each gripper (3) is rotatably connected to the movable plate (5) through a connecting rod (31). The middle part of the movable plate (5) is connected to the lead screw (13). The lead screw (13) is driven by the worm gear mechanism to achieve axial rotational motion. One end of the gripper (3) is provided with a gripping head (4), and a fastening bolt (8) is screwed into the middle of the gripping head (4). The fastening bolt (8) passes through the bushing (10) provided in the middle of the gripping head (4) and is screwed into the gripper (3). A pair of rubber pillars (81) are provided on the side of the gripping head (4) facing the gripper (3). The rubber pillars (81) are limited and snapped into the limiting hole (9) opened on the outer wall of the gripper (3).

2. The positioning fixture for machining bearing rings according to claim 1, characterized in that, The worm gear mechanism includes a worm (11) and a worm wheel (12). The worm (11) is rotatably mounted on the outer side of the base (1) through a bearing component. One end of the worm (11) extends into the interior of the base (1) and meshes with the worm wheel (12). One end of the worm wheel (12) is rotatably mounted inside the base (1) through a support plate (7).

3. The positioning fixture for machining bearing rings according to claim 2, characterized in that, One end of the support plate (7) extends into the cylinder (2), and multiple support seats (51) are installed on the support plate (7). The support seats (51) are rotatably connected to the connecting rod (31) through a pin, and the other end of the connecting rod (31) is rotatably connected to the bottom of the gripper (3) through a pin.

4. The positioning fixture for machining bearing rings according to claim 1, characterized in that, The cylinder (2) has a limiting groove (6) inside to limit the installation of the movable plate (5), and the movable plate (5) can move horizontally in a straight line through the limiting groove (6).

5. A positioning fixture for machining bearing rings according to claim 2, characterized in that, A lead screw (13) is fixedly installed in the middle of the support plate (7). One end of the lead screw (13) is screwed to the middle of the movable plate (5), and the lead screw (13) passes through the movable plate (5) and extends into the dust cover (14) set on the outside of the movable plate (5).

6. A positioning fixture for machining bearing rings according to claim 1, characterized in that, The clamp (3) has a connecting hole (91) in the middle of one end for screwing and fastening bolt (8), and limit holes (9) are symmetrically opened on both sides away from the connecting hole (91). The limit holes (9) are used to connect with the rubber column (81).

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