CN-224223340-U - Floating positioning fixture

CN224223340UCN 224223340 UCN224223340 UCN 224223340UCN-224223340-U

Abstract

The utility model relates to the technical field of clamps, and particularly discloses a floating positioning clamp which comprises a mounting seat, a positioning block and a locking piece, wherein one end of the positioning block is movably arranged in the mounting seat, the other end of the positioning block extends to the outer side of the mounting seat and is provided with a positioning hole matched with a positioning pin on a workpiece, the positioning block is in a locking state and an unlocking state, the locking and the unlocking of the positioning block can be realized through the locking piece, when the positioning block is in the unlocking state, the positioning block can horizontally move relative to the mounting seat and rotate along a Z axis, namely, along with the displacement of the positioning block relative to the mounting seat, the positioning hole can move to the position right above the positioning pin, the workpiece can be clamped and positioned more accurately through the unlocking and the locking of the positioning block, the positioning precision is improved, and the displacement of the workpiece can be compensated.

Inventors

DONG HAIBO
DONG WENLONG
YANG YUNFEI

Assignees

浙江一木智能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250425

Claims (10)

1. A floating positioning fixture, comprising: a mounting base; One end of the positioning block is movably arranged in the mounting seat, the other end of the positioning block extends to the outer side of the mounting seat and is provided with a positioning hole matched with a positioning pin on a workpiece, the positioning block is in a locking state and an unlocking state, and when the positioning block is in the unlocking state, the positioning hole can move to the position right above the positioning pin; The locking piece is arranged in the mounting seat in a lifting manner, can be abutted with the positioning block so as to enable the positioning block to be kept in a locking state, and can be separated from the positioning block in a lifting manner or in a descending manner so as to enable the positioning block to be kept in an unlocking state.
2. The floating positioning fixture of claim 1, wherein the positioning block is provided with a first locking surface, the locking member is provided with a second locking surface, and the second locking surface can be mutually attached to the first locking surface.
3. A floating positioning jig according to claim 2, wherein the positioning block includes an upper end portion located inside the mount and a lower end portion located outside the mount, the first locking surface being obliquely arranged on a lower side of the upper end portion, the locking member being penetrated on the upper end portion, the second locking surface being obliquely arranged on the locking member; When the locking piece rises, the second locking surface can be attached to the first locking surface.
4. A floating positioning fixture according to claim 3, wherein said first locking surface and said second locking surface are provided as mutually adapted arcuate surfaces.
5. A floating positioning jig according to claim 3 or 4, wherein a first through hole is provided in the upper end portion, the first through hole includes a circular hole in the upper portion and a tapered hole in the lower portion, the inner wall of the tapered hole constitutes the first locking surface, and the diameter of the tapered hole gradually increases from top to bottom; The locking piece comprises a cylindrical first connecting part and a circular truncated cone-shaped locking part which is arranged below the first connecting part, wherein the locking part can be arranged in the conical hole or below the conical hole, the outer wall of the locking part forms the second locking surface, and the diameter of the locking part is gradually increased from top to bottom.
6. The floating positioning fixture of claim 5, wherein the locking member further comprises a relief portion for connecting the first connecting portion to the locking portion, the relief portion having a diameter smaller than the diameter of the circular hole, the relief portion being positioned within the circular hole when the second locking surface is disengaged from the first locking surface.
7. The floating positioning fixture of claim 5, further comprising a locking cylinder, wherein the locking cylinder is fixed at the top of the mounting seat, the two first through holes are symmetrically arranged on the upper end, the two locking pieces are respectively arranged at the two first through holes in a penetrating mode, and the two first connecting portions are connected with piston rods of the locking cylinder.
8. The floating positioning fixture according to claim 7, wherein a connecting rod is arranged at the lower end of a piston rod of the locking cylinder, the connecting rod is horizontally and transversely arranged, and two ends of the connecting rod are respectively connected with the upper ends of the two first connecting parts.
9. A floating positioning fixture according to claim 3 wherein said mounting block has a cavity therein, said upper end portion being movably disposed within said cavity.
10. A floating positioning fixture according to claim 9, wherein a second through hole for communicating with the cavity is provided in the bottom of the mounting base, and a second connecting portion is provided on the lower end portion, and the second connecting portion is detachably connected to the upper end portion through the second through hole.

Description

Floating positioning fixture Technical Field The utility model relates to the technical field of clamps, in particular to a floating positioning clamp. Background In the machining practice process, the accurate positioning and stable clamping of the clamp to the workpiece are key links for ensuring the machining quality, the existing clamp for clamping and positioning by utilizing the positioning holes is generally provided with a first positioning hole on the workpiece, a second positioning hole is arranged on the clamp, a positioning pin is arranged in the first positioning hole or the second positioning hole, and then the positioning pin is inserted into the corresponding positioning hole, so that the clamp can clamp and position the workpiece. In the prior art, on one hand, due to unavoidable dimensional deviation of a workpiece blank in the manufacturing process and errors of a clamp in the manufacturing and assembling links, the workpiece is difficult to realize ideal high-precision positioning when being fixed by the clamp, and on the other hand, during the processing process, due to external forces such as cutting force and the like, the workpiece can generate tiny displacement, and the traditional clamp lacks an effective self-adaptive adjusting mechanism to compensate the displacement, so that the processing precision is seriously influenced, and the rejection rate is increased. Disclosure of Invention The utility model is made in consideration of the problems, and the utility model aims to provide a floating positioning clamp which can adjust the position of a positioning block according to actual requirements, improve the clamping positioning precision, compensate the small displacement of a workpiece and improve the machining precision. To achieve the above object, the present utility model provides a floating positioning jig comprising: a mounting base; One end of the positioning block is movably arranged in the mounting seat, the other end of the positioning block extends to the outer side of the mounting seat and is provided with a positioning hole matched with a positioning pin on a workpiece, the positioning block is in a locking state and an unlocking state, and when the positioning block is in the unlocking state, the positioning hole can move to the position right above the positioning pin; The locking piece is arranged in the mounting seat in a lifting manner, can be abutted with the positioning block so as to enable the positioning block to be kept in a locking state, and can be separated from the positioning block in a lifting manner or in a descending manner so as to enable the positioning block to be kept in an unlocking state. According to the floating positioning clamp, the positioning block is provided with the first locking surface, the locking piece is provided with the second locking surface, and the second locking surface can be mutually attached to the first locking surface. According to the floating positioning clamp, the positioning block comprises an upper end part positioned in the mounting seat and a lower end part positioned outside the mounting seat, the first locking surface is obliquely arranged on the lower side of the upper end part, the locking piece is arranged on the upper end part in a penetrating way, and the second locking surface is obliquely arranged on the locking piece; When the locking piece rises, the second locking surface can be attached to the first locking surface. According to the floating positioning clamp, the first locking surface and the second locking surface are arc-shaped surfaces which are mutually matched. According to the floating positioning clamp, the upper end part is provided with the first through hole, the first through hole comprises a round hole at the upper part and a conical hole at the lower part, the inner wall of the conical hole forms the first locking surface, and the diameter of the conical hole is gradually increased from top to bottom; The locking piece comprises a cylindrical first connecting part and a circular truncated cone-shaped locking part which is arranged below the first connecting part, wherein the locking part can be arranged in the conical hole or below the conical hole, the outer wall of the locking part forms the second locking surface, and the diameter of the locking part is gradually increased from top to bottom. According to the floating positioning clamp, the locking piece further comprises an avoidance portion used for connecting the first connecting portion with the locking portion, the diameter of the avoidance portion is smaller than that of the round hole, and when the second locking surface is separated from the first locking surface, the avoidance portion is located in the round hole. According to the floating positioning clamp, the floating positioning clamp further comprises a locking air cylinder, wherein the locking air cylinder is fixed at the top of the mounting part, the two first throu