Turning-milling composite motorized spindle stator and rotor coaxiality detection mechanism and detection method thereof

Abstract

The invention discloses a turning-milling composite motorized spindle stator and rotor coaxiality detection mechanism and a detection method thereof, and relates to the field of composite motorized spindle assembly.The turning-milling composite motorized spindle stator and rotor coaxiality detection mechanism comprises a base, a left supporting body and a right supporting body are arranged on the base in a sliding mode, and the left supporting body and the right supporting body are used for being in rolling fit with the outer surface of a stator outer sleeve; the adjusting panel is movably arranged on the base, and when the left supporting body and the right supporting body are attached to the stator outer sleeve to rotate, the adjusting panel abuts against the left supporting body and the right supporting body; the coaxiality detection mechanism can adapt to the sizes of motorized spindles with different diameters by adjusting the positions of the left supporting body and the right supporting body, the rollers are arranged on the supporting bodies, so that the rotation precision of the motorized spindles can be conveniently detected, the left supporting body and the right supporting body are fixed in the detection process, the precision of a coaxiality detection result can be improved, and the detection accuracy is improved. And powerful guarantee is provided for electric spindle assembly quality control.

Description

Technical Field

[0001] The invention belongs to the field of composite electric spindle assembly, and more specifically, relates to a coaxiality detection mechanism and a detection method for a stator and rotor of a turning-milling composite electric spindle. Background Art

[0002] As an important configuration of high-end machine tools, turning and milling compound electric spindle technology is widely used in core fields such as aviation, aerospace, and mold processing. Its high-speed and high-precision characteristics have significantly improved the processing efficiency and quality of CNC machine tools. Therefore, by inventing a turning and milling compound stator and rotor coaxiality detection mechanism, the electric spindle assembly accuracy and processing efficiency can be improved and the cost can be reduced. There is no such mechanism in China. Therefore, the turning and milling compound electric spindle detection mechanism is very necessary and urgent. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and to provide a coaxiality detection mechanism and a detection method for the stator and rotor of a turning-milling composite electric spindle. The coaxiality detection mechanism can adapt to electric spindle sizes of different diameters by adjusting the positions of the left and right support bodies. Rollers are arranged on the support bodies, which can facilitate the detection of the rotation accuracy of the electric spindle. The left and right support bodies are fixed during the detection process, which can improve the accuracy of the coaxiality detection results and provide a strong guarantee for the quality control of the electric spindle assembly.

[0004] In order to achieve the above object, the present invention provides a turning-milling composite electric spindle stator and rotor coaxiality detection mechanism, comprising: A base is slidably provided with a left support body and a right support body, wherein the left support body and the right support body are used to roll and fit with the outer surface of the stator housing; The adjusting strip is movably arranged on the base. When the left supporting body and the right supporting body are fitted and rotated with the stator housing, the adjusting strip abuts against the left supporting body and the right supporting body.

[0005] Optionally, the left support body and the right support body are two support bodies arranged opposite to each other, and the support body comprises: A lower slide body is slidably arranged in the slide groove of the base, an upper slide body is slidably arranged on the top of the lower slide body, the fitting surfaces of the lower slide body and the upper slide body are inclined surfaces, and the inclined surfaces of the left support body and the right support body are in an inverted eight shape; A roller is rotatably arranged on the upper sliding body, and the roller is in rolling contact with the outer surface of the stator housing.

[0006] Optionally, a screw rod is rotatably arranged in the slide groove of the base, and a first external thread and a second external thread are arranged on the screw rod. The thread direction of the first external thread is opposite to the thread direction of the second external thread. The first external thread is screwed to the left support body, and the second external thread is screwed to the right support body.

[0007] Optionally, one end of the screw rod extends to the outside of the base, and a handle is provided at one end of the screw rod.

[0008] Optionally, the slide groove is U-shaped, and limiting grooves are respectively provided on both sides of the lower slide body, and pressure plates are respectively provided on the tops of the two side walls of the slide groove, and the ends of the two pressure plates close to each other are embedded in the limiting grooves.

[0009] Optionally, the adjustment strip is arranged in the slide groove, and a top screw is arranged on the side wall of the slide groove, the top screw abuts against one side of the adjustment strip, and the other side of the adjustment strip abuts against the lower slide body.

[0010] Optionally, the upper slide body is provided with a receiving groove, the top of the receiving groove is open, a bearing is provided in the receiving groove, and the roller is provided on the outer periphery of the bearing.

[0011] The present invention also provides a method for detecting the coaxiality of the stator and rotor of a turning-milling composite electric spindle. The detection method uses the above-mentioned coaxiality detection mechanism for the stator and rotor of the turning-milling composite electric spindle, and comprises: The two turning-milling composite electric spindle stator-rotor coaxiality detection mechanisms are respectively arranged at the two ends of the stator housing, the left support body and the right support body at each end are rolled and fitted with the end of the stator housing, and the rotation accuracy of the end of the stator housing is detected; When the rotation accuracy of the stator housing meets the set value, a first rotor supporting flange and a second rotor supporting flange are respectively installed at both ends of the stator housing; The rotation accuracy of the first rotor supporting flange and the second rotor supporting flange is detected, and the installation positions of the first rotor supporting flange and the second rotor supporting flange are fixed according to the detection results.

[0012] Optionally, a micrometer is used to detect the rotation accuracy.

[0013] Optionally, before the rotation accuracy of the end of the stator housing is detected, the adjustment strip is fitted to the left support body and the right support body.

[0014] The present invention provides a coaxiality detection mechanism for the stator and rotor of a turning-milling composite electric spindle and a detection method thereof, the beneficial effects of which are: the coaxiality detection mechanism can cover all the links of the electric spindle assembly, improve the assembly means and assembly efficiency of the machine tool, ensure the overall accuracy of the electric spindle components, and at the same time, can also be applied to the detection of other rotating parts, improve the measurement capability of rotating parts, and thus enhance the market competitiveness of the machine tool.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0017] Figure 1 A structural schematic diagram of a stator and rotor coaxiality detection mechanism for a turning-milling composite electric spindle according to an embodiment of the present invention is shown.

[0018] Figure 2 A side sectional view of a coaxiality detection mechanism for a turning-milling composite electric spindle stator and rotor according to an embodiment of the present invention is shown.

[0019] Figure 3 The diagram shows the positional relationship between a stator and rotor coaxiality detection mechanism of a turning-milling composite electric spindle according to an embodiment of the present invention and a stator housing and a rotor supporting flange during the detection process.

[0020] Description of reference numerals: 1. Base; 2. Left support body; 3. Right support body; 4. Stator housing; 5. Adjustment strip; 6. Baffle; 7. Lower slide body; 8. Upper slide body; 9. Roller; 10. Screw rod; 11. Handle; 12. Pressure plate; 13. Bearing; 14. First rotor support flange; 15. Second rotor support flange; 16. Micrometer. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0022] The present invention provides a coaxiality detection mechanism for a turning-milling composite electric spindle stator and rotor, comprising: The base is slidably provided with a left support body and a right support body, and the left support body and the right support body are used to roll and fit with the outer surface of the stator housing; The adjusting strip is movably arranged on the base. When the left supporting body and the right supporting body are fitted and rotated with the stator housing, the adjusting strip abuts against the left supporting body and the right supporting body.

[0023] Specifically, the coaxiality detection mechanism is to slide the left and right support bodies on the base. When the rollers of the left and right support bodies can roll and fit with the stator jacket, the stator jacket is the outer peripheral surface part of the stator. The positions of the left and right support bodies are fixed by adjusting the inlay strips. In this way, when the rollers of the support bodies rotate, the stator jacket can be driven to rotate, and it is ensured that the stator jacket does not shake during the rotation. In this way, the rotation accuracy of the stator jacket can be detected, and the runout of the positioning outer diameter of the stator jacket of the electric spindle can be detected. When the rotation accuracy of the stator jacket meets the requirements, the first rotor support flange and the second rotor support flange can be installed on both ends of the stator jacket, and then the rotation accuracy of the two rotor support flanges can be measured. When the rotation accuracy meets the process requirements, the rotor support flange can be fixed by pins. By measuring the runout accuracy of the support flanges at both ends and the stator jacket, the coaxiality of the stator and rotor of the electric spindle can be indirectly achieved. In this way, the coaxiality requirements of the stator and rotor of the electric spindle can be guaranteed.

[0024] Optionally, the left support body and the right support body are two support bodies arranged opposite to each other, and the support bodies include: A lower sliding body is slidably arranged in a sliding groove of the base, an upper sliding body is slidably arranged on the top of the lower sliding body, the fitting surfaces of the lower sliding body and the upper sliding body are inclined surfaces, and the inclined surfaces of the left supporting body and the right supporting body are in an inverted eight shape; The roller is rotatably arranged on the upper sliding body, and the roller is in rolling contact with the outer surface of the stator housing.

[0025] Specifically, two supporting bodies are symmetrically arranged on the base, and the left and right supporting bodies are arranged opposite to each other. An upper sliding body and a lower sliding body are arranged on each supporting body. The lower sliding body can slide freely along the length direction of the base, and the upper sliding body can slide on the lower sliding body in an oblique direction. In this way, with the movement and coordination of the upper and lower sliding bodies, the left and right supporting bodies can clamp and fit the stator jacket, and the two rollers on the left and right supporting bodies are tangent to the stator jacket. The stator jacket is firmly fitted with the two rollers under the action of the stator's own gravity. When the rollers rotate, the stator jacket can be driven to rotate. Since the rollers always support the stator jacket, when the stator jacket rotates accurately, When the degree does not meet the process requirements, the positions of the left and right support bodies can be adjusted accordingly. When the rotation accuracy of the stator housing meets the process requirements, the two rotor support flanges are installed at both ends. The stator housing is also driven to rotate by rollers, and the rotor support flange rotates synchronously with the stator housing. Since there is a gap between the stator housing and the rotor support flange, it is necessary to determine the rotation accuracy of the two during the rotation process. When the difference between the rotor support flanges at both ends meets the process requirements, the rotor support flange can be fixed by pins, so as to ensure the coaxiality between the two rotors and between the rotor and the stator.

[0026] In order to enable the rollers on the left and right supporting bodies to fit with the stator jacket, the left and right supporting bodies are first moved away from each other, and then the stator jacket is placed between the left and right supporting bodies, and then the left and right supporting bodies are moved in a fitting manner in the direction of the stator jacket. During the fitting movement, the relative positions of the upper sliding body and the lower sliding body can also be adjusted obliquely, so that the roller can move horizontally under the movement of the lower sliding body, and the roller can move obliquely under the movement of the upper sliding body, so that the roller can quickly fit with the stator jacket, and then the stator jacket is driven by the roller to adjust the rotation accuracy.

[0027] Optionally, a screw is rotatably arranged in the slide groove of the base, and a first external thread and a second external thread are arranged on the screw, the thread direction of the first external thread is opposite to the thread direction of the second external thread, the first external thread is screwed to the left support body, and the second external thread is screwed to the right support body.

[0028] Optionally, one end of the screw rod extends to the outside of the base, and a handle is provided at one end of the screw rod.

[0029] Specifically, in order to realize the horizontal movement of the support body on the base, a screw rod with two opposite thread directions is arranged in the slide groove of the base. By simply rotating the screw rod, the left and right support bodies can be moved in reverse and opposite directions, so that the left and right support bodies can be quickly adjusted according to the diameter size of the stator sleeve; a handle is also installed on the screw rod to facilitate the rotation and adjustment of the screw rod.

[0030] Optionally, the slide groove is U-shaped, and limiting grooves are respectively provided on both sides of the lower slide body, and pressure plates are respectively provided on the tops of the two side walls of the slide groove, and the ends of the two pressure plates close to each other are embedded in the limiting grooves.

[0031] Specifically, in order to ensure that the lower slide body can move along the length direction of the base, a pressure plate is installed on the two side walls of the slide slot, and the end of the pressure plate close to each other is embedded in the limit groove of the lower slide body, so that the pressure plate can limit the height position of the lower slide body and the position along the width direction of the base, ensuring that when the left and right support bodies approach the stator jacket, the axis of the roller on the support body is parallel to the axis of the stator jacket, so that the rotational force of the roller can be transmitted to the stator jacket to the greatest extent, and under the drive of the rollers on both sides, the stator jacket cannot be caused to rotate eccentrically, thereby improving the detection accuracy of the rotation accuracy of the stator jacket. In addition, baffles are set at both ends of the slide slot to prevent the left and right support bodies from exceeding the limit of the slide slot and causing damage to the coaxiality detection mechanism.

[0032] Optionally, the adjustment strip is arranged in the slide groove, and a top screw is arranged on the side wall of the slide groove, the top screw abuts against one side of the adjustment strip, and the other side of the adjustment strip abuts against the lower sliding body.

[0033] Specifically, after the rollers on the left and right supporting bodies are fitted with the stator sleeve, the top screw can be used to adjust the inlay strip to fit the lower sliding body. In this way, the surface friction of the inlay strip is adjusted to ensure that the lower sliding body of the left and right supporting bodies will not be displaced, ensure the rotation stability of the stator sleeve, and ensure the stability of the detection link; when measuring the coaxiality of the stator sleeve of the electric spindle of different specifications, the top screw can be withdrawn, so that the adjustment inlay strip is separated from the lower sliding body, and the left and right supporting bodies can be adjusted freely.

[0034] Optionally, the upper slide body is provided with a receiving groove, the top of the receiving groove is open, a bearing is provided in the receiving groove, and the roller is provided on the outer periphery of the bearing.

[0035] Specifically, the roller is installed in the receiving groove of the upper sliding body, and the roller is connected to the side wall of the receiving groove through a bearing, so that the roller can achieve high-precision rotation and free rotation, and the axial direction of the roller is also limited by the bearing. The upper half of the roller protrudes from the upper sliding body, so that when the roller and the stator sleeve rotate in fit, there will be no interference.

[0036] The present invention also provides a method for detecting the coaxiality of the stator and rotor of a turning-milling composite electric spindle. The detection method uses the above-mentioned coaxiality detection mechanism for the stator and rotor of the turning-milling composite electric spindle, and comprises: The coaxiality detection mechanisms of the stators and rotors of the two turning-milling composite electric spindles are respectively arranged at the two ends of the stator housing, and the left support body and the right support body at each end are rolled and fitted with the end of the stator housing, and the rotation accuracy of the end of the stator housing is detected; When the rotation accuracy of the stator housing meets the set value, a first rotor supporting flange and a second rotor supporting flange are respectively installed at both ends of the stator housing; The rotation accuracy of the first rotor support flange and the second rotor support flange is detected, and the installation positions of the first rotor support flange and the second rotor support flange are fixed according to the detection results.

[0037] Specifically, since electromagnetic force is generated when the stator and rotor of the electric spindle are connected, once the stator and rotor are adsorbed when connected, it is very difficult to adjust the relative position, which can easily cause misalignment. Therefore, the coaxiality detection mechanism is used to measure the coaxiality of the stator and rotor of the electric spindle in advance. After determining that the coaxiality of the stator housing and the rotor support flanges at both ends meets the process requirements, the rotor is installed to ensure the coaxiality of the stator and rotor.

[0038] Optionally, a micrometer is used to detect the rotation accuracy.

[0039] Optionally, before the rotation accuracy of the end of the stator housing is detected, the adjustment strip is fitted to the left support body and the right support body.

[0040] Specifically, a micrometer is used to detect the rotation accuracy of the rotating stator housing and the rotor supporting flange. This is simple and convenient to operate and does not require too much economic cost. When the stator housing is driven to rotate by the roller, the positions of the left and right support bodies are fixed. This can ensure the stable rotation of the stator housing and improve the detection efficiency of the rotation accuracy. Example

[0041] like Figures 1 to 3 As shown, the present invention provides a coaxiality detection mechanism for a turning-milling composite electric spindle stator and rotor, comprising: The base 1 is slidably provided with a left support body 2 and a right support body 3, and the left support body 2 and the right support body 3 are used to roll and fit with the outer surface of the stator housing 4; The adjusting strip 5 is movably arranged on the base 1 , and when the left supporting body 2 and the right supporting body 3 are fitted and rotated with the stator housing 3 , the adjusting strip 5 abuts against the left supporting body 2 and the right supporting body 3 .

[0042] In this embodiment, the left support body 2 and the right support body 3 are two support bodies arranged opposite to each other, and the support bodies include: The lower slide body 7 is slidably arranged in the slide groove of the base 1, and the upper slide body 8 is slidably arranged on the top of the lower slide body 7, and the contact surface between the lower slide body 7 and the upper slide body 8 is an inclined surface, and the inclined surface of the left support body 2 and the inclined surface of the right support body 3 are inverted eight shapes; The roller 9 is rotatably disposed on the upper slide body 8 , and the roller 9 is in rolling contact with the outer surface of the stator housing 2 .

[0043] In this embodiment, a screw rod 10 is rotatably arranged in the slide groove of the base 1, and a first external thread and a second external thread are arranged on the screw rod 10. The thread direction of the first external thread is opposite to the thread direction of the second external thread. The first external thread is screwed to the left support body 2, and the second external thread is screwed to the right support body 3.

[0044] In this embodiment, one end of the screw rod 10 extends to the outside of the base, and a handle 11 is provided at one end of the screw rod.

[0045] In this embodiment, the slide groove is U-shaped, and the two ends of the slide groove are blocked by baffles 6. Limiting grooves are respectively provided on both sides of the lower slide body 7. Pressure plates 12 are respectively provided on the tops of the two side walls of the slide groove, and the ends of the two pressure plates 12 close to each other are embedded in the limiting grooves.

[0046] In this embodiment, the adjustment strip 5 is arranged in the slide groove, and a top screw is arranged on the side wall of the slide groove. The top screw abuts against one side of the adjustment strip 5, and the other side of the adjustment strip 5 abuts against the lower slide body 7.

[0047] In this embodiment, the upper slide body 8 is provided with a receiving groove, the top of which is open, a bearing 13 is provided in the receiving groove, and the roller 9 is provided on the outer periphery of the bearing 13 .

[0048] The present invention also provides a method for detecting the coaxiality of the stator and rotor of a turning-milling composite electric spindle. The detection method uses the above-mentioned coaxiality detection mechanism for the stator and rotor of the turning-milling composite electric spindle, and comprises: The two turning and milling composite electric spindle stator and rotor coaxiality detection mechanisms are respectively arranged at the two ends of the stator housing 4, and the left support body 2 and the right support body 3 at each end are rolled and fitted with the end of the stator housing 4, and the rotation accuracy of the end of the stator housing 4 is detected; When the rotation accuracy of the stator housing 4 meets the set value, the first rotor supporting flange 14 and the second rotor supporting flange 15 are respectively installed at both ends of the stator housing 4; The rotation accuracy of the first rotor supporting flange 14 and the second rotor supporting flange 15 is detected, and the installation positions of the first rotor supporting flange 14 and the second rotor supporting flange 15 are fixed according to the detection result.

[0049] In this embodiment, a micrometer 16 is used to detect the rotation accuracy.

[0050] In this embodiment, before the rotation accuracy of the end of the stator housing 4 is detected, the adjustment strip 5 is fitted to the left support body 2 and the right support body 3 .

[0051] In summary, when the coaxiality detection mechanism of the stator and rotor of the turning-milling composite electric spindle is used for coaxiality detection, first, the two sets of detection mechanisms are placed on the platform, and the screw rod is rotated according to the specifications of the stator jacket 4 of the electric spindle, so that the rollers on the left support body 2 and the right support body 3 are supported at the bottom of the two ends of the stator jacket 4, and then the adjustment strip 5 is fitted and fixed with the lower sliding body 7 of the left and right support bodies, and then the stator jacket 4 is driven to rotate by the roller 9, so that the rotation accuracy of the stator jacket can be detected by the micrometer 16, and when it is determined that the rotation accuracy of the stator jacket meets the target value, the first rotor support flange 14 and the second rotor support flange 15 are connected to the two ends of the stator jacket, and then the rotation accuracy of the two support flanges is detected by the micrometer 16, until the rotation accuracy of the support flange meets the process requirements, the relative position of the support flange and the stator jacket is fixed by pins, so that the coaxiality between the rotor support flanges at both ends and the rotor support flange and the stator jacket can be ensured.

[0052] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A turning-milling composite electric spindle stator-rotor coaxiality detection mechanism, characterized in that: include: A base is slidably provided with a left support body and a right support body, wherein the left support body and the right support body are used to roll and fit with the outer surface of the stator housing; The adjusting strip is movably arranged on the base. When the left supporting body and the right supporting body are fitted and rotated with the stator housing, the adjusting strip abuts against the left supporting body and the right supporting body.

2. The coaxiality detection mechanism of the stator and rotor of the turning-milling composite electric spindle according to claim 1 is characterized in that: The left support body and the right support body are two support bodies arranged opposite to each other, and the support body comprises: A lower slide body is slidably arranged in the slide groove of the base, an upper slide body is slidably arranged on the top of the lower slide body, the fitting surfaces of the lower slide body and the upper slide body are inclined surfaces, and the inclined surfaces of the left support body and the right support body are in an inverted eight shape; A roller is rotatably arranged on the upper sliding body, and the roller is in rolling contact with the outer surface of the stator housing.

3. The coaxiality detection mechanism of the stator and rotor of the turning-milling composite electric spindle according to claim 2 is characterized in that: A screw rod is rotatably arranged in the slide groove of the base, and a first external thread and a second external thread are arranged on the screw rod. The thread direction of the first external thread is opposite to the thread direction of the second external thread. The first external thread is screwed to the left support body, and the second external thread is screwed to the right support body.

4. The coaxiality detection mechanism for the stator and rotor of the turning-milling composite electric spindle according to claim 3 is characterized in that: One end of the screw rod extends to the outside of the base, and one end of the screw rod is provided with a handle.

5. The coaxiality detection mechanism of the stator and rotor of the turning-milling composite electric spindle according to claim 2 is characterized in that: The slide groove is U-shaped, and limiting grooves are respectively provided on both sides of the lower slide body. Pressing plates are respectively arranged on the tops of the two side walls of the slide groove, and the ends of the two pressing plates close to each other are embedded in the limiting grooves.

6. The coaxiality detection mechanism for the stator and rotor of the turning-milling composite electric spindle according to claim 5 is characterized in that: The adjusting insert is arranged in the slide groove, and a top screw is arranged on the side wall of the slide groove. The top screw abuts against one side of the adjusting insert, and the other side of the adjusting insert abuts against the lower sliding body.

7. The coaxiality detection mechanism of the stator and rotor of the turning-milling composite electric spindle according to claim 2 is characterized in that: The upper slide body is provided with a receiving groove, the top of the receiving groove is open, a bearing is provided in the receiving groove, and the roller is provided on the outer periphery of the bearing.

8. A method for detecting the coaxiality of a stator and rotor of a turning-milling composite electric spindle, using the coaxiality detection mechanism for the stator and rotor of a turning-milling composite electric spindle according to any one of claims 1 to 7, characterized in that: The test method includes: The two turning-milling composite electric spindle stator-rotor coaxiality detection mechanisms are respectively arranged at the two ends of the stator housing, the left support body and the right support body at each end are rolled and fitted with the end of the stator housing, and the rotation accuracy of the end of the stator housing is detected; When the rotation accuracy of the stator housing meets the set value, a first rotor supporting flange and a second rotor supporting flange are respectively installed at both ends of the stator housing; The rotation accuracy of the first rotor supporting flange and the second rotor supporting flange is detected, and the installation positions of the first rotor supporting flange and the second rotor supporting flange are fixed according to the detection results.

9. The method for detecting the coaxiality of the stator and rotor of the turning-milling composite electric spindle according to claim 8 is characterized in that: Use a micrometer to check the rotation accuracy.

10. The method for detecting the coaxiality of the stator and rotor of a turning-milling composite electric spindle according to claim 8, characterized in that: Before the rotation accuracy of the end of the stator housing is detected, the adjustment strip is fitted to the left support body and the right support body.

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