Positioning and tensioning mechanism

Abstract

The utility model discloses a positioning and tensioning mechanism, which is used for positioning tubular workpieces and comprises a supporting seat, a driving component and a plurality of tensioning blocks. One end of the supporting base is fixed to the driving assembly, and the supporting base abuts against the end face of the workpiece. The supporting base is hollow, and the driving assembly penetrates through the supporting base. A plurality of tensioning holes are formed in the surface of the supporting seat, the tensioning holes are located in the same plane, the tensioning blocks correspond to the tensioning holes one to one, and the tensioning blocks are arranged at the tensioning holes and are in sliding connection with the driving assembly; the driving assembly moves in the axial direction of the supporting base to drive the tensioning block to move in the radial direction of the supporting base and stretch out and draw back in the tensioning hole. The fixture can realize accurate positioning and stable fixation of tubular workpieces such as square tubes and round tubes, is simple and convenient to operate, is reliable and durable, and reduces damage to the workpieces.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning, in particular to a positioning tensioning mechanism. Background Art

[0002] In the prior art, when tubular workpieces such as square tubes and round tubes need to be positioned, traditional methods such as fixture positioning, reference surface positioning, and docking positioning are usually used. However, for some special cases, especially for tubular workpieces that need to be positioned and tightened internally, traditional methods have limitations, and therefore, a positioning and tightening mechanism is needed to achieve internal positioning of tubular workpieces. Summary of the invention

[0003] According to an embodiment of the utility model, a positioning and tightening mechanism is provided for positioning a tubular workpiece, comprising: a support seat, a driving assembly and a plurality of tightening blocks;

[0004] One end of the support seat is fixed on the driving assembly, and the support seat abuts against the end surface of the workpiece;

[0005] The support seat is hollow inside, and the driving assembly passes through the support seat;

[0006] A plurality of tightening holes are opened on the surface of the support seat, and the plurality of tightening holes are located in the same plane. A plurality of tightening blocks correspond to the plurality of tightening holes one by one, and the tightening blocks are arranged at the tightening holes and are slidably connected with the driving assembly.

[0007] The driving component moves along the axial direction of the support seat, driving the tensioning block to move along the radial direction of the support seat and to extend and retract in the tensioning hole.

[0008] Furthermore, the drive assembly includes:

[0009] A driving member connected to the supporting seat;

[0010] A push rod is arranged in the support seat, one end of the push rod is connected to the output end of the driving member, the other end of the push rod is away from the driving member, the side wall of the push rod is slidably connected to the tension block, and the outer diameter of the push rod decreases from one end of the push rod to the other end of the push rod;

[0011] The driving member drives the push rod to move axially, thereby driving the tensioning block to move radially along the supporting seat.

[0012] Furthermore, a plurality of slide grooves are provided on the side wall of the push rod, and the plurality of slide grooves correspond to a plurality of tensioning blocks one by one, and the tensioning blocks are slidably connected to the slide grooves.

[0013] Furthermore, the connecting end of the tension block and the slide slot is T-shaped for adapting to the slide slot.

[0014] Furthermore, limit plates are provided at both ends of the slide groove, and the limit plates are integrally formed with the push rod.

[0015] Furthermore, a plastic sleeve is provided at one end of the tensioning block away from the push rod.

[0016] Furthermore, it also includes: a protective cover, which is arranged at the other end of the support seat to protect the workpiece.

[0017] The positioning and tightening mechanism according to the embodiment of the utility model can realize accurate positioning and firm fixation of tubular workpieces such as square tubes and round tubes, and is easy to operate, reliable and durable, and reduces damage to the workpieces.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a positioning tensioning mechanism according to an embodiment of the utility model;

[0020] Figure 2 It is a cross-sectional view of a positioning tensioning mechanism according to an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0022] First, combine Figure 1~2 The positioning and tightening mechanism according to the embodiment of the utility model is described, which is used for positioning a tubular workpiece and has a wide range of application scenarios.

[0023] like Figure 1~2 As shown, the positioning and tightening mechanism of the embodiment of the utility model is used for positioning a tubular workpiece, and comprises: a support seat 1, a driving assembly 2 and a plurality of tightening blocks 3.

[0024] Specifically, Figure 1~2 As shown, in this embodiment, one end of the support seat 1 is fixed on the driving assembly 2, the support seat 1 abuts against the end face of the workpiece, the support seat 1 is stepped, the step surface of the support seat 1 abuts against the end face of the workpiece, supports and positions the workpiece; the support seat 1 is hollow inside, and the driving assembly 2 runs through the support seat 1; a number of tightening holes are opened on the surface of the support seat 1, and the tightening holes are located in the same plane and evenly distributed around the support seat 1. A number of tightening blocks 3 correspond to the tightening holes one by one, and the tightening blocks 3 are arranged at the tightening holes and are slidably connected with the driving assembly 2; the driving assembly 2 moves along the axial direction of the support seat 1, driving the tightening blocks 3 to move along the radial direction of the support seat, and retract in the tightening holes to achieve internal tightening and fixing of the workpiece. The overall structure is simple and reliable, easy to operate, flexible and convenient.

[0025] Further, if Figure 1~2As shown, in this embodiment, the driving component 2 includes: a driving member 21, which can be a cylinder with high control accuracy. The driving member 21 is connected to the support seat 1 and has high driving efficiency; a push rod 22, which is arranged in the support seat 1, one end of the push rod 22 is connected to the output end of the driving member 21, and the push rod 22 is connected to the driving member 21 through a connecting block 23, and the other end of the push rod 22 is away from the driving member 21, and the side wall of the push rod 22 is slidingly connected to the tensioning block 3, and the outer diameter of the push rod 22 decreases from one end of the push rod 22 to the other end of the push rod 22, that is, the side wall of the push rod 22 is inclined; the driving member 21 drives the push rod 22 to move axially, driving the tensioning block 3 to move radially along the support seat, and as the push rod 22 moves upward, the outer diameter of the connection between the push rod 22 and the tensioning block 3 increases, and the tensioning block 3 is pushed out of the tensioning hole to achieve automatic tensioning.

[0026] Furthermore, in this embodiment, the side wall of the push rod 22 is provided with a plurality of slide grooves (not shown in the figure), and the plurality of slide grooves correspond to the plurality of tensioning blocks 3 one by one. The tensioning blocks 3 are slidably connected with the slide grooves, and the slide grooves enable the tensioning blocks 3 to maintain a stable trajectory during movement. The connecting end of the tensioning block 3 and the slide groove is T-shaped (not shown in the figure) for adapting to the slide groove. Limiting plates (not shown in the figure) are provided at both ends of the slide groove to limit the travel range of the tensioning block 3 during the sliding process to prevent excessive movement or separation from the push rod 22. The limiting plates are integrally formed with the push rod 22, which reduces additional connecting parts, simplifies the structure, reduces the possibility of failure, and improves reliability and stability.

[0027] Furthermore, in this embodiment, a plastic sleeve (not shown in the figure) is provided at one end of the tensioning block 3 away from the push rod 22 to protect the inner wall of the workpiece from being scratched and to improve the tensioning effect.

[0028] Further, if Figure 1~2 As shown, in this embodiment, it also includes: a protective cover 4, which is arranged at the other end of the support seat 1 and can be fixed to the support seat by bolts to prevent debris from entering the tensioning mechanism, limit the moving range of the push rod 22, and protect the workpiece.

[0029] When the tubular workpiece needs to be tightened and positioned, the telescopic rod of the cylinder extends to drive the push rod 22 to move upward. Since the outer diameter of the push rod 22 gradually increases, as the push rod 22 moves upward, the outer diameter of the junction between the push rod 22 and the tightening block 3 changes from small to large, driving the tightening block 3 to protrude out of the tightening hole to tighten the workpiece.

[0030] Above, refer to Figure 1~2 The present invention describes a positioning and tightening mechanism according to an embodiment of the utility model, which can realize accurate positioning and firm fixation of tubular workpieces such as square tubes and round tubes, and is easy to operate, reliable and durable, and reduces damage to the workpieces.

[0031] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A positioning and tightening mechanism for positioning a tubular workpiece, characterized in that: It includes: a support seat, a driving assembly and several tensioning blocks; One end of the support seat is fixed on the driving assembly, and the support seat abuts against the end surface of the workpiece; The support seat is hollow inside, and the driving assembly passes through the support seat; The support seat surface is provided with a plurality of tightening holes, the plurality of tightening holes are located in the same plane, the plurality of tightening blocks correspond to the plurality of tightening holes one by one, the tightening blocks are arranged at the tightening holes, and are slidably connected with the driving assembly; The driving assembly moves along the axial direction of the support seat, driving the tensioning block to move along the radial direction of the support seat and to be telescoped in the tensioning hole.

2. The positioning and tensioning mechanism according to claim 1, characterized in that: The drive assembly comprises: A driving member connected to the supporting seat; A push rod, wherein the push rod is arranged in the support seat, one end of the push rod is connected to the output end of the driving member, the other end of the push rod is away from the driving member, the side wall of the push rod is slidably connected to the tension block, and the outer diameter of the push rod decreases from one end of the push rod to the other end of the push rod; The driving member drives the push rod to move axially, thereby driving the tensioning block to move radially along the support seat.

3. The positioning and tensioning mechanism according to claim 2, characterized in that: The side wall of the push rod is provided with a plurality of slide grooves, the plurality of slide grooves correspond to the plurality of tensioning blocks one by one, and the tensioning blocks are slidably connected with the slide grooves.

4. The positioning and tensioning mechanism according to claim 3, characterized in that: The connecting end of the tension block and the slide slot is T-shaped and is used to fit the slide slot.

5. The positioning and tensioning mechanism according to claim 3 or 4, characterized in that: Limiting plates are provided at both ends of the slide groove, and the limiting plates are integrally formed with the push rod.

6. The positioning and tensioning mechanism according to claim 2, characterized in that: A plastic sleeve is provided at one end of the tension block away from the push rod.

7. The positioning and tensioning mechanism according to claim 1, characterized in that: It also includes a protective cover, which is arranged at the other end of the support seat to protect the workpiece.

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