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CN-224209140-U - Radial centering and axial compression composite clamping mechanism

CN224209140UCN 224209140 UCN224209140 UCN 224209140UCN-224209140-U

Abstract

The composite clamping mechanism comprises a nut, an elastic piece, an expansion sleeve pressing cover, a hole retainer ring, a workpiece pressing cover, an expansion sleeve and a taper mandrel, wherein the conical body at the bottom of the taper mandrel is concentrically sleeved with the expansion sleeve, the outer side of the expansion sleeve is concentrically sleeved with the workpiece, the end face of the expansion sleeve shaft is pressed with the expansion sleeve pressing cover, the end face of the workpiece shaft is pressed with the workpiece pressing cover, the nut is screwed with the threaded part at the top of the taper mandrel, a nut cavity sleeve is integrally formed at the bottom of the nut, an axial pressing elastic piece is arranged in the nut cavity sleeve, the axial pressing elastic piece axially presses the expansion sleeve pressing cover downwards, and the expansion sleeve pressing cover and the nut cavity sleeve are coaxially positioned and connected through the hole retainer ring. The axial compression and radial centering of the product can be realized simultaneously only by screwing the nut, the clamping is simple and convenient, the repeated clamping and positioning precision is high, the high-precision processing requirement is met, the whole mechanism is compact in structure and small in occupied space, the manufacturing cost is reduced, and the assembly efficiency is improved.

Inventors

  • DU MENGQI
  • MA ZHIJIE
  • WANG XIAONING
  • ZHANG RUIGANG
  • Zhao Xikong

Assignees

  • 陕西渭河工模具有限公司

Dates

Publication Date
20260508
Application Date
20250417

Claims (7)

  1. 1. A radial centering and axial compacting composite clamping mechanism is characterized by comprising a nut (1), an elastic piece (2), an expansion sleeve pressing cover (3), a hole retainer ring (4), a workpiece pressing cover (5), an expansion sleeve (7) and a taper mandrel (8), wherein the conical body (801) at the bottom of the taper mandrel (8) is concentrically sleeved with the expansion sleeve (7), the outer side of the expansion sleeve (7) is concentrically sleeved with a workpiece (6), the axial end face of the expansion sleeve (7) is pressed with the expansion sleeve pressing cover (3), the axial end face of the workpiece (6) is pressed with the workpiece pressing cover (5), the nut (1) is screwed with a threaded part (802) at the top of the taper mandrel (8), a nut cavity sleeve (101) is integrally formed at the bottom of the nut (1), the nut cavity sleeve (101) is internally provided with the axial pressing elastic piece (2), the axial pressing sleeve pressing cover (3) is axially pressed down by the nut cavity sleeve (101), and the pressing cover (3) and the nut pressing cover (5) is coaxially connected with the expansion retainer ring (101) through the hole retainer ring (4).
  2. 2. The radial centering and axial compression composite clamping mechanism according to claim 1 is characterized in that the taper mandrel (8) is composed of a cone body (801), an optical axis (803) and a thread (802) which are integrally formed in sequence, the cone body (801) is tightly matched with the expansion sleeve (7) and centers the workpiece (6), the thread (802) is used for screwing a proper nut (1), and the optical axis (803) is axially matched with the expansion sleeve pressing cover (3).
  3. 3. The radial centering and axial compacting composite clamping mechanism disclosed by the claim 1 or 2 is characterized in that a workpiece gland (5) is arranged on the outer side of the expansion sleeve gland (3), the lower end face of the workpiece gland (5) presses down the shaft end face of a workpiece (6), the upper end face of the workpiece gland (5) is pressed against the lower end face of a nut cavity sleeve (101), the lower end face of the expansion sleeve gland (3) is pressed against the shaft end face of an expansion sleeve (7), the upper end face of the expansion sleeve gland (3) is pressed against the lower end face of a shaft pressure elastic piece (2), and the upper end face of the shaft pressure elastic piece (2) is pressed against the inner end face of the nut cavity sleeve (101).
  4. 4. A radial centering and axial compression composite clamping mechanism according to claim 3, wherein the axial compression elastic element (2) is a disc spring.
  5. 5. A radial centering and axial compression composite clamping mechanism according to claim 3, wherein the expansion sleeve gland (3) is coaxially and adaptively connected with the workpiece gland (5).
  6. 6. The radial centering and axial compression composite clamping mechanism according to claim 3, wherein the top end of the expansion sleeve gland (3) is provided with a convex boss (301).
  7. 7. The radial centering and axial pressing composite clamping mechanism according to claim 1, wherein the maximum diameter of the nut (1) is not larger than the diameter of an inner hole of the workpiece (6) and is used for sleeving the workpiece (6) without disassembling the nut (1), the workpiece gland (5) is provided with a notch slot (501), and the notch slot (501) is used for laterally disassembling the workpiece gland (5) without disassembling the nut (1).

Description

Radial centering and axial compression composite clamping mechanism Technical Field The utility model belongs to the technical field of clamping of work-piece transportation in operation, and relates to a radial centering and axial compression composite clamping mechanism. Background The machining process requires a reliable product positioning mode, namely a flat tongs or a three-jaw chuck, which belongs to a universal clamp and has the principle of limiting the degree of freedom of workpiece clamping. During finish machining, the part is not only clamped, but also aligned to meet the requirement of form and position tolerance. During finish machining, the clamping requirements are not only limited to positioning reliability, but also positioning accuracy is required to be ensured due to the existence of secondary clamping and the need of ensuring form and position tolerance. In the prior art, the positioning clamping of a workpiece is generally divided into radial centering clamping or axial compression clamping, and a composite clamping tool design combining the two is rarely adopted. In this regard, the following improvements have been proposed. Disclosure of utility model The utility model solves the technical problem of providing a composite clamping mechanism with radial centering and axial compression, which can realize axial compression and radial centering clamping and solves the technical problem of how to realize simple and convenient high-precision clamping of workpieces. The utility model adopts the technical scheme that the composite clamping mechanism comprises a nut, an elastic piece, an expansion sleeve gland, a hole retainer ring, a workpiece gland, an expansion sleeve and a taper mandrel, wherein the conical body at the bottom of the taper mandrel is concentrically sleeved with the expansion sleeve, the outer side of the expansion sleeve is concentrically sleeved with a workpiece, the end face of the expansion sleeve is pressed with the expansion sleeve gland, the end face of the workpiece shaft is pressed with the workpiece gland, the nut is screwed with the screw thread at the top of the taper mandrel, the bottom of the nut is integrally formed with a nut cavity sleeve, an axial compression elastic piece is arranged in the nut cavity sleeve, the axial compression elastic piece axially presses the expansion sleeve gland downwards, and the expansion sleeve gland and the nut cavity sleeve are coaxially positioned and connected through the hole retainer ring. In the technical scheme, the taper mandrel is preferably composed of a cone body part, an optical axis part and a thread part which are sequentially and integrally formed, wherein the cone body part is tightly matched with the expansion sleeve and centers a workpiece, the thread part is used for screwing a proper matched nut, and the optical axis part is axially matched with the gland of the expansion sleeve. The technical scheme is that a workpiece gland is arranged on the outer side of the expansion sleeve gland, the lower end face of the workpiece gland presses the end face of the workpiece shaft downwards, the upper end face of the workpiece gland presses the lower end face of the nut cavity sleeve, the lower end face of the expansion sleeve gland presses the end face of the expansion sleeve shaft, the upper end face of the expansion sleeve gland presses the lower end face of the shaft pressing elastic piece, and the upper end face of the shaft pressing elastic piece presses the inner end face of the nut cavity sleeve. In the technical scheme, the shaft pressing elastic piece is preferably a disc spring. In the technical scheme, the expansion sleeve gland is further coaxially and adaptively connected with the workpiece gland. In the technical scheme, the top end of the expansion sleeve gland is further provided with a convex boss. In the technical scheme, the nut has the maximum diameter not exceeding the diameter of the inner hole of the workpiece, the workpiece can be sleeved without disassembling the nut, and the workpiece gland is provided with a notch slot for laterally disassembling the workpiece gland without disassembling the nut. Compared with the prior art, the utility model has the advantages that: 1. When the clamping device is used, the workpiece gland is pressed down by the nut to realize axial compression of the workpiece, meanwhile, the shaft compression elastic piece moves downwards in the nut pressing process to drive the expansion sleeve pressing cover to move downwards, the expansion sleeve matched with the taper mandrel is expanded in the expansion sleeve pressing cover pressing process to realize radial centering of the workpiece, the axial compression and the radial centering clamping can be realized, and the technical problems of simplicity and convenience in clamping and high precision in the process of realizing the workpiece are solved. 2. The axial compression and radial centering of the product can be