Inner support positioning device

Abstract

The utility model relates to an inner support positioning device which comprises a main shaft, one end of the main shaft is matched with a socket spanner through a left end thread, and the other end of the main shaft is matched with a base through a right end thread. A first spring, a first elastic pressing block, a first gasket, a first spring gasket and a first nut are sequentially arranged between the left end of the main shaft and the socket spanner in a sleeving manner; a second spring, a second elastic pressing block, a second gasket, a second spring gasket and a second nut are sequentially arranged between the right end of the main shaft and the base in a sleeving manner; the left end thread and the right end thread are opposite in spiral direction. In the implementation process, a product needing to be machined is arranged on the main shaft in a sleeving mode, the elastic pressing block in the main shaft is internally supported by screwing the nuts at the two ends, and therefore the product is fixed, the center holes in the two ends of the main shaft and the two tips are used as the positioning reference, the center holes and the tips are still used as the positioning reference after turning around, and positioning errors caused by secondary clamping can be eliminated. And stable high-precision coaxiality processing can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to an inner support positioning device, in particular to an inner support positioning device used for high-precision coaxial processing. Background Art

[0002] In the existing mechanical manufacturing industry, the requirements for machined parts are getting higher and higher. In particular, the assembly of some precision parts involving high-precision form and position tolerances, such as the assembly of bearing chambers, rotors, stators, etc., directly affects the speed and life of the rotor if the coaxiality accuracy is not high.

[0003] If the current traditional processing methods are used, the processing accuracy required by the design cannot be guaranteed. For example, if the inner hole and outer diameter at both ends of the same component need to be processed, the high-precision coaxiality of the inner hole and outer diameter must be guaranteed. Conventional processing methods cannot be mass-produced and have a high defect rate.

[0004] Therefore, there is an urgent need in the market for a special tooling for high-precision coaxiality processing. Summary of the invention

[0005] The utility model aims to provide an improved inner support positioning device, which can ensure the high-precision coaxiality of the inner hole and the outer diameter on a unified component through structural improvement.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: an internal support positioning device, characterized in that: the internal support positioning device includes a main shaft, one end of the main shaft cooperates with the socket wrench through a left-end thread, and the other end of the main shaft cooperates with the base through a right-end thread; a first spring, a first elastic pressure block, a first gasket, a first spring gasket and a first nut are sequentially arranged between the left end of the main shaft and the socket wrench; a second spring, a second elastic pressure block, a second gasket, a second spring gasket and a second nut are sequentially arranged between the right end of the main shaft and the base; the spiral direction of the left-end thread is opposite to that of the right-end thread.

[0007] Preferably, the first and second elastic pressure blocks are cylindrical in shape and have a through hole therein, the through hole being formed by connecting a horn through hole and a cylindrical through hole, an axial elastic groove being provided along the outer side walls of the first and second elastic pressure blocks, and a plurality of radial elastic grooves being provided along the inner side walls of the first and second elastic pressure blocks.

[0008] Preferably, the horn through hole is provided with a large port and a small port, the small port is connected to the cylindrical through hole, one end of the radial elastic groove extends to the large port, and the other end passes through the small port and extends to 1 / 2-1 / 3 of the length direction of the cylindrical through hole, and is perpendicular to the axial elastic groove.

[0009] Furthermore, the ratio of the length of the horn through hole to the length of the cylindrical through hole is 1:1-0.6, the width of the radial elastic groove and the axial elastic groove is 0.8-1.1mm, the radial elastic groove runs through the cylinder wall of the first and second elastic pressing blocks, and the depth of the axial elastic groove is 2 / 3 of the thickness of the cylinder wall of the first and second elastic pressing blocks.

[0010] Furthermore, a raised annular convex strip is provided in the middle of the main shaft, and the two ends of the main shaft are left and right threaded ends, and the main shaft and the left and right threaded ends are connected through a conical surface.

[0011] Furthermore, left and right connecting columns extending outward are provided on the outer sides of the left and right threaded ends, a first nut mounting groove matching with the first nut is provided in the socket wrench, and a second nut mounting groove matching with the second nut is provided in the base.

[0012] Compared with the prior art, the technical solution of the utility model not only improves the overall technical solution, but also includes many improvements in details. Specifically, it has the following beneficial effects:

[0013] The improved scheme described in the utility model is that one end of the spindle cooperates with the socket wrench through the left end thread, and the other end of the spindle cooperates with the base through the right end thread. The product to be processed is sleeved on the spindle, and the elastic pressure block in the spindle is supported by tightening the nuts at both ends, so as to fix the product. The center holes at both ends of the spindle and the two tops are used as the positioning reference. After turning around, the center holes and the tops are still used as the positioning reference, which can eliminate the positioning error caused by secondary clamping and can achieve stable high-precision coaxial processing.

[0014] In the technical solution of the utility model, the spiral direction of the left end thread is opposite to that of the right end thread, so that when the product is processed, as the product rotates, the nuts at both ends can be consistent with the processing cutting direction, preventing the nuts from loosening during the processing;

[0015] In the structure of the utility model, the first and second elastic pressing blocks are cylindrical, and are provided with a through hole inside, which is formed by connecting the horn through hole and the cylindrical through hole. An axial elastic groove is provided along the outer side wall of the first and second elastic pressing blocks, and a plurality of radial elastic grooves are arranged along the inner side wall of the first and second elastic pressing blocks. When the elastic pressing blocks are subjected to the tightening pressure of the nut, they can evenly and quickly support the inside of the product, thereby clamping the product. At the same time, the structure of the elastic pressing blocks is also conducive to effective contraction when subjected to force.

[0016] The utility model has the advantages of simple structure, reasonable layout, convenient use, good coaxiality positioning effect and convenient promotion and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the explosion structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the product structure that needs to be processed for the utility model.

[0019] Figure 3 It is a schematic diagram of the structure of the utility model after assembly.

[0020] Figure 4 It is a schematic diagram of the structure of the first and second elastic pressing blocks of the utility model.

[0021] Figure 5 This is another structural schematic diagram of the first and second elastic pressing blocks of the utility model.

[0022] Reference numerals:

[0023] 1. Products that need to be processed;

[0024] 2 socket wrenches;

[0025] 3 first nut;

[0026] 4 first spring washer;

[0027] 5 first gasket;

[0028] 6 first elastic pressing block;

[0029] 7 first spring;

[0030] 8 spindles;

[0031] 9 second spring;

[0032] 10 second elastic pressing block;

[0033] 11 second gasket;

[0034] 12 second spring washer;

[0035] 13 second nut;

[0036] 14 base;

[0037] 61 speaker through hole;

[0038] 62 cylindrical through hole;

[0039] 63 axial elastic groove;

[0040] 64 radial elastic groove;

[0041] 81 annular convex strip;

[0042] 82 cone surface. DETAILED DESCRIPTION

[0043] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] The utility model provides an inner support positioning device, see Figure 1 The difference between the present invention and the prior art lies in that the inner support positioning device comprises a main shaft 8, one end of which cooperates with the socket wrench through a left-end thread, and the other end of the main shaft 8 cooperates with the base through a right-end thread; a first spring 7, a first elastic pressure block 6, a first gasket 5, a first spring gasket 4 and a first nut 3 are sequentially sleeved between the left end of the main shaft 8 and the socket wrench 2; a second spring 9, a second elastic pressure block 10, a second gasket 11, a second spring gasket 12 and a second nut 13 are sequentially sleeved between the right end of the main shaft 8 and the base 14; the spiral directions of the left-end thread and the right-end thread are opposite, so that the product rotates with the product during processing, thereby preventing the first and second nuts 3 and 13 from loosening during processing.

[0045] During implementation, the first and second springs, the first and second elastic pressure blocks, the first and second washers, the first and second spring washers, and the first and second nuts are first installed on the main shaft and pre-tightened. The main shaft is then installed on the base, and the product to be processed is then sleeved on the main shaft. The first and second elastic pressure blocks in the main shaft are supported internally by tightening the first and second nuts at both ends, thereby fixing the product. The center hole in the main shaft is then supported by two centers. After the inner hole and outer diameter of one end are processed, the main shaft is turned around and the inner hole and outer diameter of the other end are processed. This processing method uses the center holes at both ends of the main shaft and the two centers as positioning references. After turning around, the center holes and centers are still used as positioning references, which can eliminate the positioning errors caused by secondary clamping, and thus can achieve stable high-precision coaxial processing. Example 1

[0046] In this embodiment, the inner support positioning device includes a main shaft 8, one end of the main shaft cooperates with the socket wrench through the left end thread, and the other end of the main shaft cooperates with the base 14 through the right end thread; the first spring, the first elastic pressure block, the first gasket, the first spring gasket and the first nut are sequentially sleeved between the left end of the main shaft and the socket wrench; the second spring, the second elastic pressure block, the second gasket, the second spring gasket and the second nut are sequentially sleeved between the right end of the main shaft and the base; the spiral direction of the left end thread is opposite to that of the right end thread. The utility model can meet the needs of processing the inner hole and outer diameter at both ends on the same component, and ensure the high-precision coaxiality of the inner hole and the outer diameter. This method is easy to operate and greatly improves the processing accuracy and processing efficiency.

[0047] Specifically, the first and second elastic pressure blocks are cylindrical and have a through hole therein, which is formed by connecting the horn through hole 61 and the cylindrical through hole 62. An axial elastic groove 63 is provided along the outer wall of the first and second elastic pressure blocks, and a plurality of radial elastic grooves 64 are provided along the inner wall of the first and second elastic pressure blocks.

[0048] The horn through hole 61 is provided with a large port and a small port, the small port is connected to the cylindrical through hole, one end of the radial elastic groove 64 extends to the large port, and the other end passes through the small port and extends to 1 / 2-1 / 3 of the length direction of the cylindrical through hole, and forms a vertical intersection with the axial elastic groove 63.

[0049] The ratio of the length of the horn through hole 61 to the length of the cylindrical through hole 62 is 1:1-0.6, preferably 1:0.8, the width of the radial elastic groove and the axial elastic groove is 0.8-1.1mm, preferably 1mm, the radial elastic groove runs through the cylinder wall of the first and second elastic pressing blocks, and the depth of the axial elastic groove is 2 / 3 of the thickness of the cylinder wall of the first and second elastic pressing blocks.

[0050] Furthermore, a raised annular ridge 81 is provided in the middle of the main shaft for fixing and limiting the first and second springs during installation. The two ends of the main shaft are left and right threaded ends. The main shaft is connected to the left and right threaded ends through a conical surface 82. The conical surface here cooperates with the flared mouths of the first and second pressure blocks, which can further limit the end points of the first and second springs.

[0051] Left and right connecting columns extending outward are arranged on the outer sides of the left and right threaded ends, a first nut mounting groove matching with the first nut is arranged in the socket wrench, and a second nut mounting groove matching with the second nut is arranged in the base. In this embodiment, since the center holes at both ends of the main shaft and the two tops are used as positioning references, the center holes and the tops are still used as positioning references after turning around, which can eliminate the positioning error caused by secondary clamping, so that stable high-precision coaxial processing can be achieved. The positioning device of the utility model is easy to operate and use, has strong versatility, saves time and effort, and improves work efficiency and processing accuracy. Example 2

[0052] An internal support positioning device of the utility model comprises a main shaft, one end of the main shaft cooperates with a socket wrench through a left end thread, and the other end of the main shaft cooperates with a base through a right end thread; a first spring, a first elastic pressure block, a first gasket, a first spring gasket and a first nut are sequentially sleeved between the left end of the main shaft and the socket wrench; a second spring, a second elastic pressure block, a second gasket, a second spring gasket and a second nut are sequentially sleeved between the right end of the main shaft and the base; the spiral direction of the left end thread is opposite to that of the right end thread.

[0053] Among them, the first and second elastic pressure blocks are made of 65Mn spring steel material, which has a high elastic limit and high yield strength ratio, and can ensure that no elastic deformation occurs under high load and frequent use. The roughness of the first and second elastic pressure blocks and the main shaft matching area is less than Ra0.4, which is convenient for the first and second spring pressure blocks to be affected by the tightening force of the first and second nuts, and can be smoothly supported internally, thereby clamping the product. The first and second elastic pressure blocks have 8 1mm wide elastic grooves evenly distributed radially, and a 1mm wide elastic groove is also set at 3 / 4 of the axial direction, with a groove depth of about 2 / 3 of the wall thickness. The radial spring groove extends to the axial groove, which is conducive to the effective contraction of the spring pressure block when subjected to force.

[0054] The method for using the inner support positioning processing device of the device is as follows: a. Figure 2 a. Rough machining of the product, except for the outer diameter and inner hole at both ends which require a 0.1mm margin, all other areas are machined in place; b. Install the spring, elastic pressure block, gasket, spring gasket and nut on the spindle and pre-tighten it; c. Install the spindle on the base, and then put the product to be processed on the spindle, and tighten the nuts at both ends to make the elastic pressure block in the spindle supported internally, so that the internal support device is fixed to the product; d. Use two centers to support the center hole in the spindle, and after processing the inner hole and outer diameter of one end, turn around and still use the two centers to support the center hole in the spindle to process the inner hole and outer diameter of the other end; because the center holes at both ends of the spindle and the two centers are used as the positioning reference, the center hole and the center are still used as the positioning reference after turning around, which can eliminate the positioning error caused by secondary clamping, so that stable high-precision coaxial processing can be achieved.

[0055] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to the above descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An internal support positioning device, characterized in that: The internal support positioning device includes a main shaft, one end of the main shaft cooperates with the socket wrench through a left end thread, and the other end of the main shaft cooperates with the base through a right end thread; a first spring, a first elastic pressure block, a first gasket, a first spring gasket and a first nut are sequentially sleeved between the left end of the main shaft and the socket wrench; a second spring, a second elastic pressure block, a second gasket, a second spring gasket and a second nut are sequentially sleeved between the right end of the main shaft and the base; the spiral direction of the left end thread is opposite to that of the right end thread.

2. An internal support positioning device according to claim 1, characterized in that: The first and second elastic pressing blocks are cylindrical and have a through hole therein, the through hole being formed by connecting a horn through hole and a cylindrical through hole, an axial elastic groove being arranged along the outer side wall of the first and second elastic pressing blocks, and a plurality of radial elastic grooves being arranged along the inner side wall of the first and second elastic pressing blocks.

3. An internal support positioning device according to claim 2, characterized in that: The horn through hole is provided with a large and a small port, the small port is connected to the cylindrical through hole, one end of the radial elastic groove extends to the large port, and the other end passes through the small port and extends to 1 / 2-1 / 3 of the length direction of the cylindrical through hole, and is perpendicular to the axial elastic groove.

4. The inner support positioning device according to claim 2, characterized in that: The ratio of the length of the horn through hole to the length of the cylindrical through hole is 1:1-0.6, the width of the radial elastic groove and the axial elastic groove is 0.8-1.1mm, the radial elastic groove runs through the cylinder wall of the first and second elastic pressing blocks, and the depth of the axial elastic groove is 2 / 3 of the thickness of the cylinder wall of the first and second elastic pressing blocks.

5. The inner support positioning device according to claim 1, characterized in that: A raised annular convex strip is arranged in the middle of the main shaft, and the two ends of the main shaft are left and right thread ends, and the main shaft and the left and right thread ends are connected through a conical surface.

6. The inner support positioning device according to claim 1, characterized in that: Left and right connecting columns extending outward are arranged on the outer sides of the left and right threaded ends, a first nut mounting groove matched with the first nut is arranged in the socket wrench, and a second nut mounting groove matched with the second nut is arranged in the base.

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