Self-centering positioning device

Abstract

The embodiment of the invention provides a self-centering positioning device which comprises a positioning frame and a fixing assembly, the fixing assembly is used for fixing the positioning frame, the positioning frame comprises a frame body, a first matching piece and a positioning sleeve, the first matching piece is connected with the frame body, the positioning sleeve is connected with the frame body, and the positioning sleeve is used for positioning a to-be-assembled position; the fixing assembly is movably connected with the first matching piece and used for connecting the positioning frame and the body device. After the positioning frame is fixed to the body device through the fixing assembly, the to-be-assembled position can be determined according to the position of the positioning sleeve, and the workpiece needing to be positioned is positioned relative to the body device.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing technology, and in particular to a self-centering positioning device. Background Art

[0002] In engineering practice, it is often necessary to center and position workpieces to be welded. When centering workpieces to be welded, it is necessary to use the symmetry center of a previously finished structure as a reference to symmetrically position another set of previously finished workpieces to meet the positional dimensional accuracy required by the drawing and achieve the goal of not requiring machining of the positioned workpieces after welding.

[0003] For example, the hinge holes on the cylinder base of a certain model of a towing device are all machined in the original state. During welding, the components are aligned using the machined holes on the structural components as a reference, and no further machining is performed after welding. This reduces the machining workload on large equipment, improves production efficiency, and reduces production costs. Conventional technology requires welding positioning components before securing the cylinder base in place when assembling it to the towing device, resulting in low assembly efficiency. Summary of the Invention

[0004] The embodiment of the present application provides a self-centering positioning device to solve the problem of low efficiency in positioning and assembling of a cylinder seat in the prior art.

[0005] The present invention provides a self-centering positioning device, comprising:

[0006] The positioning frame includes a frame body, a first matching piece and a positioning sleeve, the first matching piece is connected to the frame body, the positioning sleeve is connected to the frame body, and the positioning sleeve is used to locate the position to be assembled;

[0007] The fixing component is movably connected to the first matching piece, and the fixing component is used to connect the positioning frame and the main body device.

[0008] In a feasible implementation, the first matching piece includes a first matching sleeve and a second matching sleeve, the first matching sleeve and the second matching sleeve are respectively connected to the frame, and the first matching sleeve and the second matching sleeve are arranged in opposite positions;

[0009] Two ends of the fixing assembly are connected to the first matching sleeve and the second matching sleeve respectively.

[0010] In a feasible implementation, the fixing assembly includes a driving rod and a second matching member;

[0011] There are at least two second fittings, which are respectively mounted on both ends of the driving rod, and the two second fittings are respectively fitted in the first fitting sleeve and the second fitting sleeve. The driving rod selectively drives the second fitting to move in the first fitting sleeve and the second fitting sleeve at the same time. The second fittings are used to connect the positioning frame with the main body device.

[0012] In a feasible implementation, the second mating piece is connected to the first mating sleeve via a thread; the second mating sleeve is connected to the second mating sleeve via a thread, and the thread direction of the first mating sleeve is opposite to the thread direction of the second mating sleeve.

[0013] In a feasible implementation, the second mating member is configured as a mating rod, the first end of the mating rod is configured as a flat square structure, and the second end of the mating rod is configured as a boss structure;

[0014] Both ends of the driving rod are provided with sliding grooves matching the flat square structure, and the flat square structure is slidably connected with the sliding grooves.

[0015] In a feasible implementation, the flat square structure is provided with a limit groove, which is arranged along the length direction of the flat square structure; limit holes are respectively provided at both ends of the driving rod, and the limit holes and the limit groove are connected by a pin shaft.

[0016] In a feasible implementation, the fixing assembly further includes a rotating member, the rotating member is connected to the driving rod, and the rotating member and the driving rod are perpendicular to each other.

[0017] In a feasible implementation, the rotating member is located in the middle of the driving rod.

[0018] In a feasible implementation, a connecting hole is provided in the middle of the driving rod, and the rotating rod is provided in the connecting hole.

[0019] In a feasible implementation, the frame includes at least two transverse bars and at least two longitudinal bars, the at least two transverse bars and the at least two longitudinal bars are connected to each other, and the first matching piece and the positioning sleeve are respectively located at two ends of the transverse bar.

[0020] The present application provides a self-centering positioning device, including a positioning frame and a fixing assembly. The fixing assembly is used to fix the positioning frame, which includes a frame body, a first mating member, and a positioning sleeve. The first mating member is connected to the frame body, and the positioning sleeve is connected to the frame body. The positioning sleeve is used to locate the position to be assembled. The fixing assembly is movably connected to the first mating member and is used to connect the positioning frame to a main body. After the fixing assembly fixes the positioning frame to the main body, the position to be assembled can be determined based on the position of the positioning sleeve, thereby achieving the positioning of the workpiece to be positioned relative to the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0022] In the attached figure:

[0023] Figure 1 This is a schematic diagram of the main device after assembly;

[0024] Figure 2 yes Figure 1 A side view of the main body device after assembly;

[0025] Figure 3 is a schematic diagram of positioning the main body device using a self-centering positioning device;

[0026] Figure 4 yes Figure 3 A schematic structural diagram of the centering and positioning device;

[0027] Figure 5 yes Figure 4 A schematic diagram of the structure of the fixed components in FIG.

[0028] Figure 6 yes Figure 5 Schematic diagram of the structure of the driving rod;

[0029] Figure 7 yes Figure 6 A cross-sectional view of the driving rod in FIG.

[0030] Figure 8 yes Figure 6 Schematic diagram of the structure of the second matching part.

[0031] Description of reference numerals:

[0032] 100-Main unit; 200-Parts to be assembled; 300-Self-centering positioning device;

[0033] 110-reference pin hole; 310-positioning frame; 320-fixing component;

[0034] 311 - frame; 312 - first matching member; 313 - positioning sleeve; 321 - driving rod; 322 - second matching member; 323 - rotating member;

[0035] 3111- horizontal bar; 3112- vertical bar; 3121- first matching sleeve; 3122- second matching sleeve; 3211- slide groove; 3212- limiting hole; 3213- connecting hole; 3221- flat square structure; 3222- boss structure; 3223- limiting groove. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will provide a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0037] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] In engineering practice, it is often necessary to center and position workpieces to be welded. When centering workpieces to be welded, it is necessary to use the symmetry center of a previously finished structure as a reference to symmetrically position another set of previously finished workpieces to meet the positional dimensional accuracy required by the drawing and achieve the goal of not requiring machining of the positioned workpieces after welding.

[0041] Taking our factory's products as an example, the hinge holes of the cylinder seat of a certain model of supporting device are all machined in the part state. When welding the components, the machined holes on the structural parts are used as the reference for centering and positioning, and no further machining is performed after welding.

[0042] Figure 1 is a schematic diagram of the main device 100 after assembly; Figure 2 yes Figure 1 A side view of the main body device 100 after assembly is completed.

[0043] by Figure 1 and Figure 2 As shown, before welding the cylinder seat to the main unit 100, it is necessary to first determine the welding position on the main unit 100. When installing and positioning the cylinder seat, due to the deformation of the welded structural parts of the supporting device, it is impossible to position it based on the boundary of the welded structural parts, and it must be positioned based on its finished pin shaft hole. During positioning, in addition to ensuring the dimensional relationship between the cylinder seat to be positioned and the reference pin shaft hole 110, it is also necessary to ensure its central symmetry relative to the two reference pin shaft holes 110. Since the reference pin shaft hole 110 and the cylinder seat to be positioned are not in the same plane, traditional positioning methods such as manual marking are cumbersome and have low accuracy.

[0044] In addition, in the prior art, when assembling the oil cylinder seat to the traction device, the positioning parts need to be welded and then the oil cylinder seat needs to be fixed in a specified position, resulting in low assembly efficiency.

[0045] In order to solve the above problems, the present application provides a self-centering positioning device 300. The solution provided by the embodiment of the present application will be described in detail below in conjunction with the drawings in the specification.

[0046] Figure 3 is a schematic diagram of positioning the main body device 100 using the self-centering positioning device 300; Figure 4 yes Figure 3 Schematic diagram of the structure of the centering and positioning device.

[0047] Reference Figure 3 and Figure 4 As shown, the embodiment of the present application provides a self-centering positioning device 300, including a positioning frame 310 and a fixing assembly 320. The positioning frame 310 includes a frame body 311, a first mating member 312, and a positioning sleeve 313. The first mating member 312 is connected to the frame body 311, and the positioning sleeve 313 is connected to the frame body 311. The positioning sleeve 313 is used to locate the position to be assembled, thereby determining the setting position of the component 200 to be assembled.

[0048] The fixing assembly 320 is movably connected to the first mating member 312 and is used to connect the positioning frame 310 to the main device 100. It is understood that after the positioning frame 310 and the main device 100 are fixedly connected together, the positioning sleeve 313 on the positioning frame 310 can be used to determine the installation position of the component 200 to be assembled on the main device 100.

[0049] Prior to adopting this technology, cylinder seats were welded during final assembly, resulting in poor positioning consistency, a positioning accuracy of 3mm, and a time-consuming and labor-intensive process, with each cylinder seat taking an average of 6.5 hours. With this positioning mechanism, positioning accuracy has reached 0.5mm, with an average time of 1.5 hours per cylinder seat. This mechanism enables rapid and precise positioning of welded parts, and has proven effective in engineering projects.

[0050] In addition, illustratively, the frame 311 may include at least two cross bars 3111 and at least two longitudinal bars 3112 , the at least two cross bars 3111 and the at least two longitudinal bars 3112 are connected to each other, and the first matching piece 312 and the positioning sleeve 313 are respectively located at both ends of the cross bar 3111 .

[0051] Continue to refer to Figure 3 and Figure 4 As shown, in some examples, illustratively, the first mating member 312 includes a first mating sleeve 3121 and a second mating sleeve 3122, the first mating sleeve 3121 and the second mating sleeve 3122 are respectively used to connect to the frame 311, and the first mating sleeve 3121 and the second mating sleeve 3122 are arranged in relative positions; the two ends of the fixing assembly 320 are respectively connected to the first mating sleeve 3121 and the second mating sleeve 3122, that is, the first mating sleeve 3121 and the second mating sleeve 3122 are coaxially arranged, and the first mating sleeve 3121 and the second mating sleeve 3122 are both used to connect to the main device 100. Exemplarily, the main device 100 is a supporting and pulling device, the component 200 to be assembled is a cylinder seat, and the pulling device determines the installation position of the cylinder seat thereon by using the self-centering positioning device 300.

[0052] Figure 5 yes Figure 4 Schematic diagram of the structure of the fixing component 320.

[0053] Reference Figure 5As shown, in some examples, the fixing assembly 320 includes a drive rod 321 and a second mating member 322. There are at least two second mating members 322, each mounted on either end of the drive rod 321. The second mating members 322 can slide relative to the drive rod 321. The two second mating members 322 are respectively engaged in a first mating sleeve 3121 and a second mating sleeve 3122. The drive rod 321 selectively drives the second mating member 322 to move simultaneously within the first mating sleeve 3121 and the second mating sleeve 3122. The second mating members 322 are used to connect the positioning frame 310 to the main device 100. Specifically, the second mating member 322 is threadedly connected to the first mating sleeve 3121; the second mating sleeve 3122 is threadedly connected to the second mating sleeve 3122, and the thread direction of the first mating sleeve 3121 is opposite to the thread direction of the second mating sleeve 3122. Since the thread direction of the first mating sleeve 3121 is opposite to that of the second mating sleeve 3122, when the driving rod 321 rotates, the second mating pieces 322 at both ends of the driving rod 321 can move toward both ends at the same time and protrude from the first mating sleeve 3121 and the second mating sleeve 3122 respectively.

[0054] Figure 6 yes Figure 5 A schematic structural diagram of the driving rod 321; Figure 7 yes Figure 6 sectional view of the driving rod 321 in FIG.

[0055] Reference Figure 6 and Figure 7 As shown, the second mating member 322 is configured as a mating rod, with the first end of the mating rod configured as a flat square structure 3221 and the second end of the mating rod configured as a boss structure 3222. Both ends of the driving rod 321 are provided with sliding grooves 3211 that mate with the flat square structure 3221, with the flat square structure 3221 being slidably connected to the sliding grooves 3211. The second end of the mating rod is configured as a boss structure 3222, which facilitates abutment against the reference pin hole 110 of the main body device 100, facilitating the fixation of the positioning frame 310 and, in turn, facilitating the fixing of the positioning frame 310 to the main body. Furthermore, since the first end of the mating rod is configured as the flat square structure 3221 and the two ends of the driving rod 321 are provided with sliding grooves 3211 that mate with the flat square structure 3221, this ensures that the mating rod can move relative to the driving rod 321 and also enables the driving rod 321 to drive the mating rod to rotate within its corresponding first mating sleeve 3121 or second mating sleeve 3122 during rotation.

[0056] Figure 8 yes Figure 6 Schematic diagram of the structure of the second matching piece 322.

[0057] Continue to refer to Figure 7 and Figure 8As shown, in some examples, the flat square structure 3221 is provided with a limiting slot 3223, which is arranged along the length of the flat square structure 3221. The driving rod 321 is provided with a limiting hole 3212 at each end, and the limiting hole 3212 and the limiting slot 3223 are connected by a pin. For example, the limiting slot 3223 can be a kidney-shaped slot, and the pin is inserted into the limiting hole 3212 and is located in the kidney-shaped slot. The pin can limit the relative rotation between the mating rod and the driving rod 321.

[0058] Continue to refer to Figures 3 to 5 As shown, the fixing assembly 320 further includes a rotating member 323, which is connected to the driving rod 321, and the rotating member 323 and the driving rod 321 are perpendicular to each other. Exemplarily, the rotating member 323 can be a rotating rod, which is passed through the driving rod 321 or one end of which is fixedly connected to the driving rod 321.

[0059] For example, the rotating member 323 can be located in the middle of the driving rod 321, and the distance between the rotating member 323 and the second matching members 322 at both ends of the driving rod 321 is the same, so that the rotating member 323 applies the same force to the two second matching members 322, ensuring that the two second matching members 322 move synchronously in opposite directions.

[0060] For example, a connection hole 3213 is provided in the middle of the driving rod 321 , and the rotating rod can be provided in the connection hole 3213 by means of threads or welding.

[0061] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0062] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A self-centering positioning device, characterized in that: include: A positioning frame (310), the positioning frame (310) comprising a frame body (311), a first matching piece (312) and a positioning sleeve (313), the first matching piece (312) being connected to the frame body (311), the positioning sleeve (313) being connected to the frame body (311), and the positioning sleeve (313) being used for positioning a position to be assembled; A fixing assembly (320) is movably connected to the first matching member (312), and the fixing assembly (320) is used to connect the positioning frame (310) and the main body device (100).

2. The self-centering positioning device according to claim 1, characterized in that: The first matching piece (312) includes a first matching sleeve (3121) and a second matching sleeve (3122), the first matching sleeve (3121) and the second matching sleeve (3122) are respectively connected to the frame (311), and the first matching sleeve (3121) and the second matching sleeve (3122) are arranged in relative positions; The two ends of the fixing assembly (320) are respectively connected to the first matching sleeve (3121) and the second matching sleeve (3122).

3. The self-centering positioning device according to claim 2, characterized in that: The fixing assembly (320) includes a driving rod (321) and a second matching member (322); There are at least two second fitting members (322), and the two second fitting members (322) are respectively mounted on both ends of the driving rod (321), and the two second fitting members (322) are respectively fitted in the first fitting sleeve (3121) and the second fitting sleeve (3122). The driving rod (321) selectively drives the second fitting member (322) to move in the first fitting sleeve (3121) and the second fitting sleeve (3122) at the same time. The second fitting member (322) is used to connect the positioning frame (310) with the main body device (100).

4. The self-centering positioning device according to claim 3, characterized in that: The second mating piece (322) is connected to the first mating sleeve (3121) by a thread; the second mating sleeve (3122) is connected to the second mating sleeve (3122) by a thread, and the thread direction of the first mating sleeve (3121) is opposite to the thread direction of the second mating sleeve (3122).

5. The self-centering positioning device according to claim 4, characterized in that: The second matching piece (322) is configured as a matching rod, the first end of the matching rod is configured as a flat square structure (3221), and the second end of the matching rod is configured as a boss structure (3222); Both ends of the driving rod (321) are provided with sliding grooves (3211) matching the flat square structure (3221), and the flat square structure (3221) is slidably connected to the sliding grooves (3211).

6. The self-centering positioning device according to claim 5, characterized in that: The flat square structure (3221) is provided with a limiting groove (3223), and the limiting groove (3223) is arranged along the length direction of the flat square structure (3221); the two ends of the driving rod (321) are respectively provided with limiting holes (3212), and the limiting holes (3212) and the limiting groove (3223) are connected by a pin shaft.

7. The self-centering positioning device according to claim 3, characterized in that: The fixing assembly (320) further includes a rotating member (323), the rotating member (323) is connected to the driving rod (321), and the rotating member (323) and the driving rod (321) are perpendicular to each other.

8. The self-centering positioning device according to claim 7, characterized in that: The rotating member (323) is located in the middle of the driving rod (321).

9. The self-centering positioning device according to claim 8, characterized in that: A connecting hole (3213) is provided at a middle position of the driving rod (321), and the rotating rod is provided in the connecting hole (3213).

10. The self-centering positioning device according to claim 1, characterized in that: The frame (311) includes at least two cross bars (3111) and at least two longitudinal bars (3112), the at least two cross bars (3111) and the at least two longitudinal bars (3112) are connected to each other, and the first matching piece (312) and the positioning sleeve (313) are respectively located at two ends of the cross bar (3111).

Images