Mounting structure for eliminating tangential play of a radar scanner angular position sensor

Abstract

The application belongs to the field of mechanical structure design, and particularly relates to a mounting structure for eliminating tangential play of an angular position sensor of a radar scanner, comprising a steel sleeve fixing member and an inner ring fixing member sleeved in the center hole of the steel sleeve fixing member; the inner ring fixing member is provided with a guide pin, and the steel sleeve fixing member is provided with a pin hole for inserting the guide pin; the guide pin inserted into the pin hole limits the relative rotation of the inner ring fixing member and the steel sleeve fixing member; the extended part of the guide pin after being inserted into the pin hole is sleeved in the center hole of a play-eliminating steel sleeve, and the play-eliminating steel sleeve is fixed to the steel sleeve fixing member through a screw; the cooperation gap between the center hole and the guide pin is smaller than the cooperation gap between the pin hole and the guide pin, the tangential play of the rotary transformer installation can be completely eliminated, the axial looseness is maintained, the scanning precision is high, and the scanning positioning precision of the radar scanner is improved.

Description

Technical Field

[0001] This application belongs to the field of mechanical structure design, and specifically relates to an installation structure for eliminating the tangential backlash of a radar scanner angular position sensor. Background Technology

[0002] The radar scanner uses an angular position sensor to detect and provide real-time angular information of the scanned space. The size of the tangential (rotational direction) clearance (side clearance) of the angular position sensor affects the radar scanning positioning accuracy. The angular position sensor mounting design employs a guide pin and pin-hole interlocking structure: the guide pin is inserted into the pin hole, providing tangential constraint and controlling rotation around the axis. Axial constraint is relaxed to avoid over-constraint in both the axial and tangential directions.

[0003] The pin-and-hole mating structure of the angular position sensor has the following disadvantages:

[0004] High precision is required for the machining of mounting structural components: The machining precision of mounting structural components such as guide pins and pin holes must be very high to ensure the fit accuracy and assembly consistency.

[0005] Controlling the tightness of the pin and pin hole fit is difficult: if the fit is too tight, it forms a rigid connection, making assembly difficult and causing excessive constraint; if the fit is too loose, the side clearance is too large, resulting in a decrease in rotational positioning accuracy.

[0006] Tangential backlash cannot be completely eliminated: Due to manufacturing and assembly errors, tangential backlash always exists between the guide pin and the pin hole after the angular position sensor is installed. Tangential installation errors cannot be completely eliminated, which affects the positioning accuracy of the scanner to a certain extent. Summary of the Invention

[0007] To address the aforementioned issues, this application provides an installation structure for eliminating tangential backlash in the angular position sensor of a radar scanner, comprising: a steel sleeve fixing member and an inner ring fixing member fitted within the central hole of the steel sleeve fixing member;

[0008] The inner ring fastener has a guide pin, and the steel sleeve fastener has a pin hole into which the guide pin is inserted; the guide pin is inserted into the pin hole to restrict the relative rotation between the inner ring fastener and the steel sleeve fastener.

[0009] The protruding part of the guide pin after being inserted into the pin hole is fitted into the center hole of the gap-free steel sleeve. The gap-free steel sleeve is fixed to the steel sleeve fixing component by screws. The clearance between the center hole and the guide pin is smaller than the clearance between the pin hole and the guide pin.

[0010] Preferably, the gap-free steel sleeve is divided into a left gap-free steel sleeve and a right gap-free steel sleeve by the axis of symmetry, and the left gap-free steel sleeve and the right gap-free steel sleeve are joined on both sides of the guide pin and sleeved on the guide pin.

[0011] Preferably, the left and right gap-free steel sleeves are fitted with elastic clamping rings, which allow the left and right gap-free steel sleeves to overlap with the guide pin.

[0012] Preferably, the wall curvature of the central hole is the same as the wall curvature of the guide pin.

[0013] Preferably, the circumferential angle of the wall surface forming the central hole of the left gapless steel sleeve is less than 180 degrees, and the circumferential angle of the wall surface forming the central hole of the right gapless steel sleeve is less than 180 degrees.

[0014] Preferably, the gap-eliminating steel sleeve has an installation edge with a through hole, and the steel sleeve fixing component has an internal threaded hole. A screw passes through the through hole and connects to the internal threaded hole. The diameter of the through hole is larger than the diameter of the screw, so that the gap-eliminating steel sleeve has positional adjustment margin.

[0015] Preferably, the guide pin and the backlash-free steel sleeve comprise two symmetrically distributed along the axis.

[0016] This application adopts an angular position sensor mounting structure with a backlash-free steel sleeve clamping the guide pin, which has low requirements for the installation and fitting accuracy of the guide pin and the pin hole on the steel sleeve fixing part; the related backlash-free steel sleeve assembly is very simple; the backlash-free steel sleeve can completely eliminate the tangential backlash of the rotary transformer installation by means of elastic clamp circle contraction and screw locking, while maintaining axial relaxation and high scanning accuracy; the entire mounting structure improves the scanning and positioning accuracy of the radar scanner. Attached Figure Description

[0017] Figure 1 This is an exploded view of the installation structure according to a preferred embodiment of this application;

[0018] Figure 2 This is a cross-sectional view of the installation structure according to a preferred embodiment of this application;

[0019] Figure 3 This is a front view of the installation structure according to a preferred embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0021] like Figures 1-3 As shown, this application provides an installation structure for eliminating the tangential backlash of a radar scanner's angular position sensor, comprising: an inner ring fixing member 5 fitted inside the central hole of a steel sleeve fixing member 4; an outer ring fixing member 8 fitted outside the inner ring fixing member 5; and an annular cavity formed between the inner ring fixing member 5 and the outer ring fixing member 8 to accommodate the angular position sensor 7; the inner ring fixing member 5, the outer ring fixing member 8, the angular position sensor 7, and the guide pin 6 form an angular position sensor assembly, such as... Figure 2 As shown, the angular position sensor assembly is inserted into the steel sleeve fastener 4, and the outer ring fastener 8 is connected to the scanner housing.

[0022] The inner ring fixing member 5 has a guide pin 6, and the steel sleeve fixing member 4 has a pin hole for inserting the guide pin 6; the guide pin 6 is inserted into the pin hole to restrict the relative rotation of the inner ring fixing member 5 and the steel sleeve fixing member 4.

[0023] The protruding part of the guide pin 6 after being inserted into the pin hole is fitted into the center hole of the gap-free steel sleeve 3. The gap-free steel sleeve 3 is fixed to the steel sleeve fixing part 4 by screws. The clearance between the center hole and the guide pin 6 is smaller than the clearance between the pin hole and the guide pin 6.

[0024] Preferably, the gap-free steel sleeve 3 is divided into a left gap-free steel sleeve and a right gap-free steel sleeve by the axis of symmetry. The left gap-free steel sleeve and the right gap-free steel sleeve are joined on both sides of the guide pin 6 and sleeved on the guide pin 6.

[0025] Preferably, the left and right gap-free steel sleeves are fitted with elastic clamping rings 2, which allow the left and right gap-free steel sleeves to overlap with the guide pins 6.

[0026] Preferably, the wall curvature of the central hole is the same as that of the guide pin 6, which facilitates the fit between the wall of the central hole and the cylindrical surface of the guide pin 6.

[0027] Preferably, the circumferential angle of the wall surface forming the central hole of the left backlash-free steel sleeve is less than 180 degrees, and the circumferential angle of the wall surface forming the central hole of the right backlash-free steel sleeve is less than 180 degrees. That is, the left backlash-free steel sleeve and the right backlash-free steel sleeve are not perfectly round when they are joined. This can avoid the possibility that the left backlash-free steel sleeve and the right backlash-free steel sleeve cannot fit properly with the guide pin due to machining errors.

[0028] Preferably, the gap-eliminating steel sleeve 3 has an installation edge with a through hole, and the steel sleeve fixing member 4 has an internal threaded hole. The screw 1 passes through the through hole and connects with the internal threaded hole. The diameter of the through hole is larger than the diameter of the screw 1, so that the gap-eliminating steel sleeve 3 has a positional adjustment margin.

[0029] Preferably, the guide pin 6 and the backlash-free steel sleeve 3 include two that are symmetrically distributed along the axis.

[0030] The working principle of this application is as follows: To ensure the installation accuracy of the angular position sensor 7 of the radar scanner, the backlash in the tangential rotation direction must be eliminated. Simultaneously, axial rigid connections and excessive constraints should be avoided, as these would affect the operation of other precision components inside the scanner, such as slip rings. First, the semi-annular backlash-eliminating steel sleeves 3 are paired and fitted onto both sides of the cylindrical surface of the guide pin 6. Since the diameter of the elastic clamp circle 2 is smaller than the diameter of the groove, after the elastic clamp circle 2 is fitted into the circular groove of the backlash-eliminating steel sleeve 3, the elastic tension generated by the contraction of its material and tangential dimensions tightens the semi-annular backlash-eliminating steel sleeve 3, thus eliminating the tangential side clearance between the mating surfaces. Finally, the backlash-eliminating steel sleeve 3 is tightened to the steel sleeve fixing member 4 using screws 1.

[0031] Because the tangential contraction force of the elastic clamp circle 2 is small, the static friction between the guide pin 6 and the cylindrical surface of the backlash-free steel sleeve 3 is also very small. Therefore, the mounting structure can remain in a relaxed axial state. There is no harmful additional constraint load in the axial direction, avoiding a hard connection and having no impact on the operation of other precision components inside the scanner.

[0032] The entire mounting structure employs two guide pins (6), two backlash-eliminating steel sleeves (3), two elastic clamping rings (2), and eight screws (1), with a suitable lever arm between the guide pins and the rotation center. After the scanner rotates, slippage and increased backlash will not occur, ensuring a reliable structure and guaranteeing scanning positioning accuracy. Assembly of the mounting structure is very simple, allowing for easy assembly even in confined spaces.

[0033] This application adopts an angular position sensor mounting structure with a backlash-free steel sleeve clamping the guide pin, which has low requirements for the installation and fitting accuracy of the guide pin and the pin hole on the steel sleeve fixing part; the related backlash-free steel sleeve assembly is very simple; the backlash-free steel sleeve can completely eliminate the tangential backlash of the rotary transformer installation by means of elastic clamp circle contraction and screw locking, while maintaining axial relaxation and high scanning accuracy; the entire mounting structure improves the scanning and positioning accuracy of the radar scanner.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A mounting structure for eliminating tangential backlash in a radar scanner's angular position sensor, characterized in that, include: Steel sleeve fastener (4) and inner ring fastener (5) fitted into the center hole of steel sleeve fastener (4); The inner ring fixing member (5) has a guide pin (6), and the steel sleeve fixing member (4) has a pin hole for inserting the guide pin (6); the guide pin (6) is inserted into the pin hole to restrict the inner ring fixing member (5) and the steel sleeve fixing member (4) from rotating relative to each other; The protruding part of the guide pin (6) after being inserted into the pin hole is fitted into the center hole of the gap-free steel sleeve (3). The gap-free steel sleeve (3) is fixed to the steel sleeve fixing part (4) by screws. The fit clearance between the center hole and the guide pin (6) is smaller than the fit clearance between the pin hole and the guide pin (6). The gap-free steel sleeve (3) is divided into a left gap-free steel sleeve and a right gap-free steel sleeve by the axis of symmetry. The left gap-free steel sleeve and the right gap-free steel sleeve are joined on both sides of the guide pin (6) and sleeved on the guide pin (6); The left and right gapless steel sleeves are fitted with elastic clamping rings (2), which make the left and right gapless steel sleeves overlap with the guide pin (6); After the elastic clamp circle (2) is fitted into the circular groove of the gap-free steel sleeve (3), the elastic tension generated by the shrinkage of its own material and tangential dimensions will tighten the semi-circular gap-free steel sleeve (3), thus eliminating the tangential side gap between the mating surfaces. Finally, the gap-free steel sleeve (3) is tightened onto the steel sleeve fixing part (4) by screws (1).

2. The mounting structure for eliminating tangential backlash in the angular position sensor of a radar scanner as described in claim 1, characterized in that, The wall curvature of the central hole is the same as that of the guide pin (6).

3. The mounting structure for eliminating tangential backlash in the angular position sensor of a radar scanner as described in claim 1, characterized in that, The circumferential angle of the wall surface forming the central hole of the left gapless steel sleeve is less than 180 degrees, and the circumferential angle of the wall surface forming the central hole of the right gapless steel sleeve is less than 180 degrees.

4. The mounting structure for eliminating tangential backlash in the angular position sensor of a radar scanner as described in claim 1, characterized in that, The gap-eliminating steel sleeve (3) has an installation edge with a through hole, and the steel sleeve fixing part (4) has an internal thread hole. The screw passes through the through hole and connects with the internal thread hole. The diameter of the through hole is larger than the diameter of the screw, so that the gap-eliminating steel sleeve (3) has positional adjustment margin.

5. The mounting structure for eliminating tangential backlash in the angular position sensor of a radar scanner as described in claim 1, characterized in that, The guide pin (6) and the backlash-free steel sleeve (3) include two that are symmetrically distributed along the axis.

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