Floating positioning clamp

Abstract

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

Description

Technical Field

[0001] This utility model relates to the technical field of clamps, and specifically to a floating positioning clamp. Background Technology

[0002] In machining practice, the precise positioning and stable clamping of workpieces by fixtures are key to ensuring machining quality. Existing fixtures that use positioning holes for clamping and positioning typically have a first positioning hole on the workpiece and a second positioning hole on the fixture. A positioning pin is installed in the first or second positioning hole and then inserted into the corresponding positioning hole to achieve the clamping and positioning of the workpiece by the fixture.

[0003] However, in the existing technology, on the one hand, due to the unavoidable dimensional deviations in the workpiece blank during the manufacturing process and the errors generated by the fixture in the manufacturing and assembly stages, it is difficult to achieve ideal high-precision positioning of the workpiece when it is fixed by the fixture; on the other hand, during the processing, when external forces such as cutting forces act on the workpiece, it will cause the workpiece to undergo slight displacement, and traditional fixtures lack an effective adaptive adjustment mechanism to compensate for this displacement, which seriously affects the processing accuracy and increases the scrap rate. Summary of the Invention

[0004] This utility model addresses the aforementioned problems and aims to provide a floating positioning fixture that can adjust the position of the positioning block according to actual needs, thereby improving clamping and positioning accuracy. It can also compensate for minor workpiece displacement and improve machining accuracy.

[0005] To achieve the above objectives, this utility model provides a floating positioning fixture, comprising:

[0006] Mounting base;

[0007] A positioning block, one end of which is movably disposed in the mounting base, and the other end extends to the outside of the mounting base and is provided with a positioning hole that matches the positioning pin on the workpiece. The positioning block has a locked state and an unlocked state. When the positioning block is in the unlocked state, the positioning hole can be moved to directly above the positioning pin.

[0008] A locking element is provided within the mounting base in a height-adjustable manner. The locking element can abut against the positioning block to keep the positioning block in a locked state, and the locking element can be separated from the positioning block when it rises or falls to keep the positioning block in an unlocked state.

[0009] According to the above-described floating positioning fixture, the positioning block is provided with a first locking surface, and the locking member is provided with a second locking surface, the second locking surface being able to fit against the first locking surface.

[0010] According to the above-described floating positioning fixture, the positioning block includes an upper end located inside the mounting base and a lower end located outside the mounting base, a first locking surface is obliquely arranged on the lower side of the upper end, a locking member is inserted through the upper end, and a second locking surface is obliquely arranged on the locking member.

[0011] When the locking member rises, the second locking surface can fit against the first locking surface.

[0012] According to the above-described floating positioning fixture, the first locking surface and the second locking surface are set as mutually compatible arc-shaped surfaces.

[0013] According to the above-described floating positioning fixture, the upper end is provided with a first through hole, the first through hole includes an upper circular hole and a lower conical hole, the inner wall of the conical hole forms the first locking surface, and the diameter of the conical hole gradually increases from top to bottom;

[0014] The locking member includes a cylindrical first connecting portion and a frustum-shaped locking portion located below the first connecting portion. The locking portion may be located inside or below the conical hole. The outer wall of the locking portion forms the second locking surface, and the diameter of the locking portion gradually increases from top to bottom.

[0015] According to the above-described floating positioning fixture, the locking member further includes a clearance portion for connecting the first connecting portion and the locking portion. The diameter of the clearance portion is smaller than the diameter of the circular hole. When the second locking surface is disengaged from the first locking surface, the clearance portion is located inside the circular hole.

[0016] The floating positioning fixture described above also includes a locking cylinder, which is fixed to the top of the mounting part. Two first through holes are symmetrically arranged on the upper end, and two locking members are respectively inserted through the two first through holes. Both first connecting parts are connected to the piston rod of the locking cylinder.

[0017] According to the above-described floating positioning fixture, the lower end of the piston rod of the locking cylinder is provided with a connecting rod, the connecting rod is arranged horizontally, and the two ends of the connecting rod are respectively connected to the upper ends of the two first connecting parts.

[0018] According to the above-described floating positioning fixture, the mounting base has a cavity, and the upper end is movably disposed within the cavity.

[0019] According to the above-described floating positioning fixture, the bottom of the mounting base is provided with a second through hole for communicating with the cavity, and the lower end is provided with a second connecting part, which can pass through the second through hole and be detachably connected to the upper end.

[0020] This utility model has the following beneficial effects:

[0021] 1. The lifting and lowering movement of the locking component can be used to unlock or lock the positioning block. When the positioning block is in the unlocked state, it can move within the mounting base to adjust its position, which can more accurately clamp and position the workpiece, improve positioning accuracy, and compensate for the displacement of the workpiece.

[0022] 2. Both the first locking surface and the second locking surface are designed as mutually compatible arc-shaped surfaces. When they are in contact with each other, they can restrict the movement of the positioning block in multiple directions, thereby achieving a completely locked state. The structure is simple and the practicality is good.

[0023] 3. It can be locked or unlocked simultaneously from both sides of the upper end, which can ensure the stability of its locked state. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure and appearance of the embodiment;

[0025] Figure 2 This is a cross-sectional view of the overall structure of the embodiment;

[0026] Figure 3 This is a schematic diagram of the locking component structure in an embodiment.

[0027] In the picture:

[0028] 100. Mounting base; 110. Cavity; 120. Second through hole;

[0029] 200, Positioning block; 210, Positioning hole; 220, First locking surface; 230, Upper end part; 231, Round hole; 232, Tapered hole; 240, Lower end part; 241, Second connecting part;

[0030] 300, Locking element; 310, Second locking surface; 320, First connecting part; 330, Locking part; 340, Clearance part;

[0031] 400. Locking cylinder; 410. Connecting rod. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] like Figure 1-3As shown, a floating positioning fixture includes a mounting base 100, a positioning block 200, and a locking member 300. The mounting base 100 is used to provide support for the positioning block 200, the positioning block 200 is used to clamp and position the workpiece, and the locking member 300 is used to lock or unlock the positioning block 200.

[0034] One end of the positioning block 200 is movably disposed within the mounting base 100, and the other end extends to the outside of the mounting base 100 and is provided with a positioning hole 210 adapted to the positioning pin on the workpiece. The positioning block 200 has a locked state and an unlocked state. The locking and unlocking of the positioning block 200 can be achieved by the locking member 300. When the positioning block 200 is in the unlocked state, the positioning block 200 can move horizontally and rotate along the Z-axis relative to the mounting base 100. That is, as the positioning block 200 moves relative to the mounting base 100, the positioning hole 210 can move to directly above the positioning pin. In this embodiment, the positioning pin is inserted into the hole of the workpiece. During the process of clamping the workpiece, if there is no deviation of the positioning pin on the workpiece, the positioning hole 210 on the positioning block 200 directly engages with the positioning pin. When the positioning pins correspond, there is no need to move the positioning block 200, keeping it in the locked state and providing stable clamping and positioning for the workpiece. If there is a deviation in the positioning pins on the workpiece or a deviation in the positioning hole 210 on the positioning block 200, the locking member 300 releases the positioning block 200, making it in the unlocked state. During clamping, when the positioning pin contacts the edge of the positioning hole 210, it will squeeze the positioning block 200, causing it to move and align with the positioning hole 210, completing the insertion. Afterwards, the locking member 300 locks the positioning block 200 again, allowing it to apply a stable clamping force. Through the unlocking and locking of the positioning block 200, the workpiece can be clamped and positioned more accurately, improving positioning accuracy, and compensating for workpiece displacement.

[0035] In order to lock or unlock the positioning block 200 with the locking member 300, in this embodiment, the locking member 300 is vertically and vertically mounted in the mounting base 100. The locking member 300 can abut against the positioning block 200 to keep the positioning block 200 in the locked state. Of course, the direction of abutment can be selected in different directions. If the locking member 300 abuts against the positioning block 200 from top to bottom, it can be separated from the positioning block 200 by raising the locking member 300. If the locking member 300 abuts against the positioning block 200 from bottom to top, it can be separated from the positioning block 200 by lowering the locking member 300 to keep the positioning block 200 in the unlocked state. The positioning block 200 can be displaced to achieve its adjustment and compensation.

[0036] Specifically, the positioning block 200 is provided with a first locking surface 220, and the locking member 300 is provided with a second locking surface 310. The second locking surface 310 can fit against the first locking surface 220 to lock the positioning block 200. That is, by using the mutual contact between the first locking surface 220 and the second locking surface 310, the freedom of the positioning block 200 in multiple directions can be restricted, keeping it in a locked state. Separation of the two surfaces can unlock the positioning block 200.

[0037] The positioning block 200 includes an upper end 230 located inside the mounting base 100 and a lower end 240 located outside the mounting base 100. The upper end of the positioning block 200 is movably disposed inside the mounting base 100, and the lower end of the positioning block 200 is disposed outside the mounting base 100. The first locking surface 220 is obliquely arranged on the lower side of the upper end 230, and the locking member 300 passes through the upper end 230. The second locking surface 310 is obliquely arranged on the locking member 300 and located below the first locking surface 220. When the locking member 300 rises, the second locking surface 310 can fit against the first locking surface 220 and abut against the positioning block 200 from bottom to top to achieve locking and positioning. The two can be separated by the lowering of the locking member 300 to achieve unlocking.

[0038] The first locking surface 220 and the second locking surface 310 are designed as mutually compatible arc-shaped surfaces. As mentioned above, both are arranged at an angle, that is, both locking surfaces are designed as inclined arc-shaped surfaces. When they are in contact with each other, they can achieve multi-directional limiting of the positioning block 200 and prevent it from rotating.

[0039] Specifically, to facilitate the arrangement of the locking member 300 and prevent it from interfering with the positioning and clamping operation of the positioning block 200, a first through hole is provided on the upper end 230. The first through hole includes an upper circular hole 231 and a lower tapered hole 232. The inner wall of the tapered hole 232 forms a first locking surface 220, and the diameter of the tapered hole 232 gradually increases from top to bottom. The locking member 300 includes a cylindrical first connecting portion 320 and a part located at the first connecting portion 320. The locking part 330 is located below and is shaped like a frustum. The locking part 330 can be located inside or below the conical hole 232. The outer wall of the locking part 330 forms the second locking surface 310. The diameter of the locking part 330 gradually increases from top to bottom. The locking member 300 is inserted on the upper end 230. During the upward movement of the locking member 300, its outer wall will fit against the inner wall of the conical hole 232, thereby realizing the positioning and locking of the positioning block 200.

[0040] Of course, in this embodiment, in order to ensure the stability of the locking of the positioning block 200, the tilt angle and curvature of the first locking surface 220 and the second locking surface 310 are required to be consistent to ensure that they can be properly fitted.

[0041] Of course, in order for the positioning block 200 to be displaced relative to the locking member 300, the locking member 300 also includes a clearance portion 340 for connecting the first connecting portion 320 and the locking portion 330. The diameter of the clearance portion 340 is smaller than the diameter of the circular hole 231. When the second locking surface 310 is disengaged from the first locking surface 220, the clearance portion 340 is located inside the circular hole 231. When the second locking surface 310 is disengaged from the first locking surface 220, the locking member 300 needs to avoid interfering with the fine adjustment of the positioning block 200. Therefore, the clearance portion 340 is provided. The clearance portion 340 can be used to avoid the positioning block 200, which facilitates the displacement of the positioning block 200.

[0042] To provide locking and unlocking forces, a locking cylinder 400 is also included. The locking cylinder 400 is fixed to the top of the mounting part, and two first through holes are symmetrically arranged on the upper end 230. Two locking members 300 are respectively inserted through the two first through holes. The two first connecting parts 320 are connected to the piston rod of the locking cylinder 400. The locking cylinder 400 can drive the two locking members 300 to perform synchronous lifting and lowering movements, thereby synchronously locking and unlocking the upper end 230 and ensuring the stability of the positioning block 200 in the locked state.

[0043] In order to achieve synchronous driving of the locking cylinder 400 to the two locking parts 300, the lower end of the piston rod of the locking cylinder 400 is provided with a connecting rod 410. The connecting rod 410 is arranged horizontally, and the two ends of the connecting rod 410 are respectively connected to the upper ends of the two first connecting parts 320. That is, the piston rod of the locking cylinder 400 drives the connecting rod 410 to move up and down, and the connecting rod 410 simultaneously drives the two first connecting parts 320 to rise or fall.

[0044] In order to ensure that the upper end 230 can move within the mounting base 100, the mounting base 100 is provided with a cavity 110, the upper end 230 is movably disposed within the cavity 110, and the diameter of the cavity 110 should be larger than the diameter of the upper end 230 to allow the upper end 230 to be displaced.

[0045] To facilitate the installation of the positioning block 200, in this embodiment, the positioning block 200 is designed as a split unit, with the upper end 230 and the lower end 240 designed as separate units. The upper end 230 is first placed in the cavity 110, and a second through hole 120 for communicating with the cavity 110 is provided at the bottom of the mounting base 100. A second connecting part 241 is provided on the lower end 240. The second connecting part 241 can pass through the second through hole 120 and be detachably connected to the upper end 230. It is required that the diameter of the second connecting part 241 is smaller than the diameter of the second through hole 120 to provide space for the second connecting part 241 to move with the lower end 240. In this embodiment, the second connecting part 241 and the upper end 230 are connected by bolts. A first threaded hole is provided on the second connecting part 241, and a corresponding second threaded hole is provided on the upper end 230. A bolt can be screwed into the connecting hole of the first threaded hole and the second threaded hole to achieve a detachable connection between the two.

[0046] In order to lock the positioning block 200 by abutting the first locking surface 220 and the second locking surface 310, the roughness of the first locking surface 220 and the second locking surface 310 can be set to be large to increase the friction between them, so that they cannot move when they are in contact with each other.

[0047] The technical solution of this utility model has been described in detail above with reference to the accompanying drawings. The described embodiments are used to help understand the concept of this utility model. The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0048] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0049] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A floating positioning fixture, characterized in that, include: Mounting base; A positioning block, one end of which is movably disposed in the mounting base, and the other end extends to the outside of the mounting base and is provided with a positioning hole that matches the positioning pin on the workpiece. The positioning block has a locked state and an unlocked state. When the positioning block is in the unlocked state, the positioning hole can be moved to directly above the positioning pin. A locking element is provided within the mounting base in a height-adjustable manner. The locking element can abut against the positioning block to keep the positioning block in a locked state, and the locking element can be separated from the positioning block when it rises or falls to keep the positioning block in an unlocked state.

2. The floating positioning fixture according to claim 1, characterized in that, The positioning block is provided with a first locking surface, and the locking member is provided with a second locking surface, the second locking surface being able to fit against the first locking surface.

3. A floating positioning fixture according to claim 2, characterized in that, The positioning block includes an upper end located inside the mounting base and a lower end located outside the mounting base. The first locking surface is obliquely arranged on the lower side of the upper end, the locking member passes through the upper end, and the second locking surface is obliquely arranged on the locking member. When the locking member rises, the second locking surface can fit against the first locking surface.

4. A floating positioning fixture according to claim 3, characterized in that, The first locking surface and the second locking surface are set as mutually compatible arc-shaped surfaces.

5. A floating positioning fixture according to claim 3 or 4, characterized in that, The upper end is provided with a first through hole, which includes an upper circular hole and a lower conical hole. The inner wall of the conical hole forms the first locking surface, and the diameter of the conical hole gradually increases from top to bottom. The locking member includes a cylindrical first connecting portion and a frustum-shaped locking portion located below the first connecting portion. The locking portion may be located inside or below the conical hole. The outer wall of the locking portion forms the second locking surface, and the diameter of the locking portion gradually increases from top to bottom.

6. A floating positioning fixture according to claim 5, characterized in that, The locking member further includes a clearance portion for connecting the first connecting portion and the locking portion. The diameter of the clearance portion is smaller than the diameter of the circular hole. When the second locking surface is disengaged from the first locking surface, the clearance portion is located inside the circular hole.

7. A floating positioning fixture according to claim 5, characterized in that, It also includes a locking cylinder, which is fixed to the top of the mounting base. Two first through holes are symmetrically arranged on the upper end, and two locking members are respectively inserted through the two first through holes. Both first connecting parts are connected to the piston rod of the locking cylinder.

8. A floating positioning fixture according to claim 7, characterized in that, The piston rod of the locking cylinder is provided with a connecting rod at its lower end. The connecting rod is arranged horizontally, and both ends of the connecting rod are respectively connected to the upper ends of the two first connecting parts.

9. A floating positioning fixture according to claim 3, characterized in that, The mounting base has a cavity, and the upper end is movably disposed within the cavity.

10. A floating positioning fixture according to claim 9, characterized in that, The bottom of the mounting base is provided with a second through hole for communicating with the cavity, and the lower end is provided with a second connecting part, which can pass through the second through hole and be detachably connected to the upper end.

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