Centering chuck
By designing a centering chuck including a motor, trapezoidal screw and bevel gear system, the existing large parts fixtures have poor clamping accuracy, small range and inability to lock themselves, and the high-precision and wide range of automatic clamping and locking functions have been achieved.
Patent Information
- Application Number
- CN202420450036.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-08
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-08
AI Technical Summary
Existing large parts fixtures have problems such as poor clamping accuracy, small clamping range and inability to lock themselves, resulting in high labor costs and inconvenient operation.
A centering chuck is designed, including a disc body, a motor, a trapezoidal screw, a sliding base, a jaw, a positioning block, a conical pinion and a conical large gear. The circular movement of the trapezoidal screw is driven by the motor, and combined with the bevel gear system, the linear movement and self-locking functions of the jaw are realized.
It realizes automatic control, high positioning accuracy, large clamping range, strong adaptability, and self-locking mechanism, suitable for clamping of large shafts and disc parts.
Smart Images
Figure CN222569315U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machine tool fixtures and particularly a centering chuck. Background Art
[0002] At present, there are two types of clamps for large parts: mechanical chucks and lever chucks. Mechanical chucks generally require manual adjustment of the jaw position, which consumes high labor costs and has poor centering accuracy. Lever chucks generally use a hydraulic cylinder or a pneumatic cylinder to drive the lever to lock, which has the problem of a small clamping range and the inability to self-lock.
[0003] Therefore, a clamp that can solve the problems of clamping accuracy, clamping range and clamp self-locking has broad application prospects. Utility Model Content
[0004] In view of the problems existing in the existing clamps, the utility model provides a centering chuck, including a disc body 1, a motor 2, a trapezoidal screw 3, a sliding base 4, a claw 5, a positioning block 6, a conical pinion 7 and a conical gear 8; the motor 2 is connected to the trapezoidal screw 3, and the trapezoidal screw 3 is connected to the disc body 1; the sliding base 4 is connected to the claw 5, and a conical pinion 7 is installed at the end of the trapezoidal screw 3, and the conical pinion 7 is meshed with the conical gear 8, so that the circular motion of the trapezoidal screw 3 is converted into linear motion of the claw 5 under the drive of the motor 2.
[0005] Furthermore, the disc body 1 is evenly distributed with 3 to 5 sets of motors 2, trapezoidal lead screws 3, sliding bases 4, claws 5, positioning blocks 6 and conical pinions 7 in the circumferential direction.
[0006] The thread angle of the trapezoidal screw 3 is 20-40 degrees, so that the thread lead angle of the trapezoidal screw 3 is smaller than the static friction angle, so that in the absence of external force, the trapezoidal screw 3 can remain in a self-locking state and will not rotate, and has high stability in practical applications.
[0007] The utility model has the advantages of simple structure, convenient operation, automatic control, high positioning accuracy, large clamping range, strong adaptability, and self-locking clamping mechanism, and is suitable for clamping large shafts and disc parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is a schematic diagram of a three-dimensional structure of a centering chuck disclosed in the utility model;
[0009] Figure 2 It is a partial cross-sectional schematic diagram of a centering chuck disclosed in the utility model;
[0010] Figure 3 Schematic diagram of an embodiment of the tooth angle of the trapezoidal lead screw 3.
[0011] Figure numerals: 1. disk body, 2. motor, 3. trapezoidal screw, 4. sliding base, 5. claw, 6. positioning block, 7. conical small gear, 8. conical large gear. DETAILED DESCRIPTION
[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0013] like Figure 1 and Figure 2 As shown, the utility model discloses a centering chuck, including a disc body 1, a motor 2, a trapezoidal screw 3, a sliding base 4, a claw 5, a positioning block 6, a bevel pinion 7 and a bevel gear 8; the motor 2 is connected to the trapezoidal screw 3, and the trapezoidal screw 3 is connected to the disc body 1; the sliding base 4 is connected to the claw 5, and a bevel pinion 7 is installed at the end of the trapezoidal screw 3, and the bevel pinion 7 is meshed with the bevel gear 8, so that the circular motion of the trapezoidal screw 3 is converted into linear motion of the claw 5 under the drive of the motor 2.
[0014] The motor 2 is connected to the trapezoidal screw 3 through a key, and the trapezoidal screw 3 is connected to the disc body 1 through a bearing to ensure the rotation accuracy of the trapezoidal screw 3; the copper nut on the trapezoidal screw 3 is connected to the nut seat through a bolt, the nut seat is connected to the sliding base 4 through a bolt, and the sliding base 4 is connected to the upper claw 5 through a bolt, so that the circular motion of the trapezoidal screw 3 is converted into the linear motion of the claw 5;
[0015] The conical large gear 8 is installed on the core shaft through the bearing, and the core shaft is connected to the oil distribution ring through the bearing. The disk body 1 is evenly distributed with 3 to 5 sets of motors 2, trapezoidal screws 3, sliding bases 4, claws 5, positioning blocks 6 and conical small gears 7 in the circumferential direction. The user sets the required number of kits according to work needs.
[0016] like Figure 3 As shown, the tooth angle of the trapezoidal screw 3 is 20-40 degrees, preferably 30 degrees, so that the thread lead angle of the trapezoidal screw 3 is smaller than the static friction angle, so that in the absence of external force, the trapezoidal screw 3 can remain in a self-locking state and will not rotate, and has higher stability in practical applications.
[0017] The motor drives the trapezoidal screw 3 to rotate, and the conical pinion 7 meshes with the conical gear 8 to rotate, driving the synchronous clamping of the claw 5, so that the radial movement speed of the claw 5 connected to the trapezoidal screw 3 is the same, achieving the function of automatic centering. During the product processing, after the claw 5 clamps the workpiece, the end face of the workpiece is directly exposed, and convenient processing operations can be performed. In this embodiment, the conical gear 8 can be replaced by a gear ring with helical teeth on the upper surface.
[0018] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.
Claims
1. A centering chuck, characterized in that: The invention comprises a disk body (1), a motor (2), a trapezoidal screw rod (3), a sliding base (4), a clamping claw (5), a positioning block (6), a conical pinion gear (7) and a conical gear (8); the motor (2) is connected to the trapezoidal screw rod (3), and the trapezoidal screw rod (3) is connected to the disk body (1); the sliding base (4) is connected to the clamping claw (5), and the end of the trapezoidal screw rod (3) is provided with a conical pinion gear (7), and the conical pinion gear (7) is meshed with the conical gear (8), so that the circular motion of the trapezoidal screw rod (3) is converted into the linear motion of the clamping claw (5) under the drive of the motor (2).
2. A centering chuck according to claim 1, characterized in that: The disk body (1) is evenly distributed with 3 to 5 sets of motors (2), trapezoidal lead screws (3), sliding bases (4), claws (5), positioning blocks (6) and conical pinions (7) in a circumferential direction.
3. A centering chuck according to claim 1, characterized in that: The thread angle of the trapezoidal screw (3) is 20-40 degrees.