Large heavy load high-precision rotary drive wheel set

Abstract

The present application relates to test class rotary drive technical field, specifically relates to a kind of large heavy load high-precision rotary drive wheel group.It includes wheel seat main body, shafting pedestal assembly, support arm assembly and ball hinge support assembly, two shafting pedestal assemblies are respectively installed in the two sides of wheel seat main body and are used to drive wheel seat main body rotation, ball hinge support assembly, support arm assembly are installed in wheel seat main body and are matched to support rotary table;Shafting pedestal assembly includes shafting pedestal main body, servo motor, speed reducer, wheel shaft, conical roller and encoder, speed reducer, wheel shaft and conical roller are all installed in shafting pedestal main body, servo motor is connected with wheel shaft by speed reducer, wheel shaft is arranged in conical roller and moves synchronously with it, the input end of encoder is connected with the end portion encoder shaft of wheel shaft.The purpose of the large heavy load high-precision rotary drive wheel group is to solve the problem of low rotary drive control precision of large heavy load high-precision rotary platform.

Description

Technical Field

[0001] This invention relates to the field of test-type rotary drive technology, specifically to a large, heavy-duty, high-precision rotary drive wheel set. Background Technology

[0002] With the increasing demand for RCS (Radar Cross Section) testing of aircraft, the requirements for the rotational positioning accuracy and stability of large heavy-duty rotary platforms are becoming increasingly stringent. Due to the influence of their own structural dimensions and load, large heavy-duty high-precision rotary platforms are difficult to achieve high-precision rotational drive.

[0003] Therefore, the inventors have provided a large, heavy-duty, high-precision rotary drive wheel set. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] This invention provides a large, heavy-duty, high-precision rotary drive wheel set, which solves the technical problem of low rotary drive control accuracy in large, heavy-duty, high-precision rotary platforms.

[0006] (2) Technical solution

[0007] This invention provides a large, heavy-duty, high-precision rotary drive wheel assembly, comprising a wheel seat body, a shaft base assembly, a support arm assembly, and a ball joint support assembly. Two shaft base assemblies are respectively mounted on both sides of the wheel seat body and are used to drive the wheel seat body to rotate. The ball joint support assembly is mounted on the upper end face of the wheel seat body. The support arm assembly is mounted on the wheel seat body and cooperates with the ball joint support assembly to support a turntable.

[0008] The shaft base assembly includes a shaft base body, a servo motor, a reducer, a wheel axle, a conical roller, and an encoder. The reducer, the wheel axle, and the conical roller are all mounted on the shaft base body. The output end of the servo motor is connected to the wheel axle through the reducer and is used to drive the wheel axle to rotate. The wheel axle passes through the conical roller and moves synchronously with it. The input end of the encoder is connected to the encoder shaft at the end of the wheel axle.

[0009] Furthermore, the shaft base assembly also includes a mounting flange, self-aligning roller bearings, and a flat key. One end of the mounting flange is connected to the output end of the reducer, and the other end of the mounting flange is connected to the shaft base body. The self-aligning roller bearings are installed at both ends of the axle, and the tapered roller is sleeved on the axle through the flat key.

[0010] Furthermore, the shaft base assembly also includes a locking nut, spacer A and spacer B. The tapered roller is positioned and connected to the corresponding self-aligning roller bearings on both sides through spacer A and spacer B, respectively, and is locked to the wheel axle by the locking nut.

[0011] Furthermore, the shaft base assembly also includes a bearing block, a bearing cover, and an encoder mounting component. The self-aligning roller bearings on both sides are connected to the corresponding bearing blocks and the shaft base body as a rotating pair. The bearing blocks and the bearing covers are both connected to the shaft base body.

[0012] The encoder mounting component is connected to the bearing cover, and the encoder is connected to the encoder mounting component.

[0013] Furthermore, the included angle between the axes of the two said shaft base assemblies is greater than zero.

[0014] Furthermore, the support arm assembly includes a support arm, a base, a rotating shaft, a tapered roller bearing, and a spacer C;

[0015] The support arm is connected to the rotating shaft and rotates synchronously. Both ends of the rotating shaft are equipped with tapered roller bearings through the spacer C. The tapered roller bearings and the base form a rotating pair connection. The rotating shaft is installed on the base, and the base is connected to the wheel seat body.

[0016] Furthermore, the ball joint support assembly includes a lower seat plate, a spherical crown liner, a wear-resistant plate, a pressure ring, and an upper seat plate;

[0017] The spherical crown liner is positioned and connected to the lower seat plate stop, the wear-resistant plate is connected to the spherical crown liner, the upper seat plate is hinged to the wear-resistant plate, the pressure ring is connected to the lower seat plate and is used to press the upper seat plate and the wear-resistant plate tightly together, and the lower seat plate is connected to the upper end face of the wheel seat body.

[0018] Furthermore, the center of the spherical crown liner is located on the axis of the rotating shaft.

[0019] Furthermore, the large heavy-duty high-precision rotary drive wheel set also includes a track cleaning assembly, which is installed on the outside of the wheel seat body and is used to clean the running track of the rotary drive wheel set.

[0020] Furthermore, the track cleaning assembly includes a track cleaning bracket, a scraper mounting plate, and a scraper. The track cleaning bracket is connected to the wheel seat body, the scraper mounting plate is connected to the bottom of the track cleaning bracket, and the scraper is mounted on the scraper mounting plate.

[0021] (3) Beneficial effects

[0022] In summary, this invention achieves high-precision rotary drive control of the wheel assembly by employing a servo motor drive and encoder closed-loop control method. The combination design of the support arm assembly and ball joint support assembly enables the wheel assembly to rotate as a whole along its axis, with the tapered roller treads on both sides adaptively contacting the circular track. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an elevation view of a large, heavy-duty, high-precision rotary drive wheel assembly provided in an embodiment of the present invention;

[0025] Figure 2 This is a top view of a large, heavy-duty, high-precision rotary drive wheel assembly provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the main body of the wheel seat of a large, heavy-duty, high-precision rotary drive wheel set provided in an embodiment of the present invention;

[0027] Figure 4 This is an elevation view of a shaft base assembly for a large, heavy-duty, high-precision rotary drive wheel set provided in an embodiment of the present invention;

[0028] Figure 5 This is a structural cross-sectional view of a shaft system base assembly for a large, heavy-duty, high-precision rotary drive wheel set provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of a track cleaning assembly for a large, heavy-duty, high-precision rotary drive wheel set provided in an embodiment of the present invention;

[0030] Figure 7 This is a structural cross-sectional view of a support arm assembly for a large, heavy-duty, high-precision rotary drive wheel assembly provided in an embodiment of the present invention;

[0031] Figure 8 This is a structural cross-sectional view of a ball joint support assembly for a large, heavy-duty, high-precision rotary drive wheel set provided in an embodiment of the present invention.

[0032] In the picture:

[0033] 1-Wheel seat body; 2-Shaft base assembly; 201-Shaft base body; 202-Servo motor; 203-Reducer; 204-Mounting flange; 205-Wheel axle; 206-Locking nut; 207-Self-aligning roller bearing; 208-Bearing pressure block; 209-Spacer A; 210-Conical roller; 211-Flat key; 212-Spacer B; 213-Bearing cover; 214-Encoder mounting component; 215-Encoder; 2 16-End cap; 3-Railway cleaning assembly; 301-Railway cleaning bracket; 302-Scraper mounting plate; 303-Scraper; 4-Support arm assembly; 401-Support arm; 402-Base; 403-Shaft; 404-Tap roller bearing; 405-Spacer C; 406-Bearing cap; 5-Spherical hinge support assembly; 501-Lower seat plate; 502-Spherical crown liner; 503-Wear-resistant plate; 504-Pressure ring; 505-Upper seat plate. Detailed Implementation

[0034] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention. That is, the present invention is not limited to the described embodiments, and any modifications, substitutions and improvements to the parts, components and connection methods are covered without departing from the spirit of the present invention.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Figure 1 This is a structural schematic diagram of a large, heavy-duty, high-precision rotary drive wheel assembly provided in an embodiment of the present invention, as shown below. Figures 1-2 As shown, the rotary drive wheel assembly may include a wheel seat body 1, a shaft base assembly 2, a support arm assembly 4, and a ball joint support assembly 5. The two shaft base assemblies 2 are respectively installed on both sides of the wheel seat body 1 and are used to drive the wheel seat body 1 to rotate. The ball joint support assembly 5 is installed on the upper end face of the wheel seat body 1. The support arm assembly 4 is installed on the wheel seat body 1 and cooperates with the ball joint support assembly 5 to support the turntable.

[0039] like Figures 4-5 As shown, the shaft base assembly 2 includes a shaft base body 201, a servo motor 202, a reducer 203, a wheel axle 205, a conical roller 210, and an encoder 215. The reducer 203, wheel axle 205, and conical roller 210 are all mounted on the shaft base body 201. The output end of the servo motor 202 is connected to the wheel axle 205 through the reducer 203 and is used to drive the wheel axle 205 to rotate. The wheel axle 205 passes through the conical roller 210 and moves synchronously with it. The input end of the encoder 215 is connected to the encoder shaft at the end of the wheel axle 205.

[0040] In the above embodiment, two servo motors 202 synchronously drive the reducer 203, which in turn drives the wheel axle 205, thereby causing the conical roller 210 to rotate on the circular track. An encoder 215 is installed at the end of the drive wheel axle 205, and a closed-loop control circuit is formed through the feedback of the encoder 215, thereby realizing high-precision rotation drive control of the wheel assembly components.

[0041] To ensure the stability of the wheelset components during operation and to prevent geometric slippage of the inner and outer rims when the wheelset components rotate, the rollers are selected with tapered treads, and the included angle between the axes of the two shaft base assemblies 2 is greater than zero (i.e., they are not set in parallel). The actual value can be determined according to the actual size of the wheelset.

[0042] Specifically, such as Figure 3 As shown, the wheel seat body 1 can be a T-shaped structure, including a horizontal part and a vertical part, so as to facilitate the installation of two sets of shaft base assemblies 2 on the left and right sides of the vertical part respectively. Figure 1 (As shown in the direction), the horizontal part is used to install the ball joint support assembly 5, and the front end of the vertical part is provided with a mounting boss to facilitate the positioning and installation of the support arm assembly 4.

[0043] As an optional implementation method, such as Figure 5 As shown, the shaft base assembly 2 also includes a mounting flange 204, a self-aligning roller bearing 207, and a flat key 211. One end of the mounting flange 204 is connected to the output end of the reducer 203, and the other end of the mounting flange 204 is connected to the shaft base body 201. Both ends of the axle 205 are equipped with self-aligning roller bearings 207, and the tapered roller 210 is sleeved on the axle 205 through the flat key 211.

[0044] Specifically, the mounting flange 204 facilitates the fixed connection between the reducer 203 and the shaft base body 201. The wheel axle 205 is supported by the self-aligning roller bearing 207 and rotates under the drive of the reducer 203. The flat key 211 is used to transmit the torque and motion generated by the wheel axle 205 to the conical roller 210.

[0045] As an optional implementation method, such as Figure 5 As shown, the shaft base assembly 2 also includes a locking nut 206, a spacer A209 and a spacer B212. The tapered roller 210 is positioned and connected to the corresponding self-aligning roller bearings 207 on both sides through spacers A209 and B212, and is locked to the axle 205 through the locking nut 206.

[0046] Specifically, the gap between the self-aligning roller bearing 207 and the tapered roller 210 is adjusted by spacers A209 and B212, and the tapered roller 210 is fixedly installed on the shaft base body 201 by locking nut 206.

[0047] As an optional implementation method, such as Figure 5 As shown, the shaft base assembly 2 also includes a bearing pressure block 208, a bearing cover 213, and an encoder mounting component 214. The self-aligning roller bearings 207 on both sides are connected to the corresponding bearing pressure block 208 and the shaft base body 201 to form a rotating pair. The bearing pressure block 208 and the bearing cover 213 are both connected to the shaft base body 201. The encoder mounting component 214 is connected to the bearing cover 213, and the encoder 215 is connected to the encoder mounting component 214.

[0048] Specifically, the bearing clamp 208 provides radial clamping to the self-aligning roller bearing 207, preventing radial movement of the self-aligning roller bearing 207. The bearing cap 213 provides axial clamping to the self-aligning roller bearing 207, preventing axial movement of the self-aligning roller bearing 207, ultimately protecting the self-aligning roller bearing 207. The encoder mounting component 214 provides mounting space for the encoder 215.

[0049] As an optional implementation method, such as Figure 2 As shown, the included angle between the axes of the two shaft base assemblies 2 is greater than zero. Specifically, in order to ensure the stability of the wheel assembly during operation and to avoid geometric slippage of the inner and outer rims when the wheel assembly rotates, the roller is selected with a tapered tread surface, and the included angle between the axes of the two sets of shaft base assemblies 2 is greater than zero. The actual value can be determined according to the actual size of the wheel assembly.

[0050] As an optional implementation method, such as Figures 1-2As shown, the large, heavy-duty, high-precision rotary drive wheel set also includes a track cleaning assembly 3. The track cleaning assembly 3 is installed on the outer side of the wheel seat body 1 and is used to clean the running track of the rotary drive wheel set. Specifically, it can be installed on the left and right sides of the wheel seat body 1 (e.g., on the left and right sides of the wheel seat body 1). Figure 1 The track cleaning components 3 are symmetrically installed on both sides (as shown) to remove foreign objects from the track at the front and rear positions when the drive wheel group rolls along the running track.

[0051] As an optional implementation method, such as Figure 6 As shown, the track cleaning assembly 3 includes a track cleaning bracket 301, a scraper mounting plate 302, and a scraper 303. The track cleaning bracket 301 is connected to the wheel seat body 1, the scraper mounting plate 302 is connected to the bottom of the track cleaning bracket 301, and the scraper 303 is mounted on the scraper mounting plate 302.

[0052] Specifically, the track cleaning bracket 301 can be a U-shaped structure, and the scraper 303 is installed on the bottom end face of the track cleaning bracket 301 to facilitate the removal of foreign objects in the track.

[0053] As an optional implementation method, such as Figure 7 As shown, the support arm assembly 4 includes a support arm 401, a base 402, a rotating shaft 403, a tapered roller bearing 404, and a spacer C405. The support arm 401 is connected to the rotating shaft 403 and rotates synchronously. Both ends of the rotating shaft 403 are equipped with tapered roller bearings 404 through spacers C405. The tapered roller bearings 404 and the base 402 form a rotating pair connection. The rotating shaft 403 is installed on the base 402, and the base 402 is connected to the wheel seat body 1.

[0054] Specifically, the free end of the support arm 401 is used to contact the bottom surface of the turntable to provide support, and the fixed end of the support arm 401 is fixed to the rotating shaft 403 and rotates synchronously. The rotating shaft 403 is supported by the tapered roller bearing 404, and the gap between the rotating shaft 403 and the tapered roller bearing 404 is adjusted by the spacer C405.

[0055] As an optional implementation method, such as Figure 8 As shown, the ball joint support assembly 5 includes a lower seat plate 501, a spherical crown liner 502, a wear-resistant plate 503, a pressure ring 504, and an upper seat plate 505; the spherical crown liner 502 is positioned and connected to the lower seat plate 501 at the stop, the wear-resistant plate 503 is connected to the spherical crown liner 502, the upper seat plate 505 is hinged to the wear-resistant plate 503, the pressure ring 504 is connected to the lower seat plate 501 and is used to press the upper seat plate 505 and the wear-resistant plate 503 tightly together, and the lower seat plate 501 is connected to the upper end face of the wheel seat body 1.

[0056] Specifically, the upper surface of the upper seat plate 505 is horizontal and serves to contact the turntable and provide support. Its structure can be similar to a T-shaped structure, without specific limitations, as long as it can achieve the same function. The pressure ring 504 is an annular structure and is fixedly connected to the lower seat plate 501 by bolts. The pressure ring 504 fits against the bottom of the T-shaped structure to radially limit it and prevent radial displacement when it rotates circumferentially along the crown spherical surface.

[0057] As an optional implementation, the center of the spherical crown liner 502 is located on the axis of the rotating shaft 403. Specifically, in order to ensure good contact between the conical roller 210 and the annular track, the support arm 401 in the support arm assembly 4 can rotate along the axis of the rotating shaft 403, and this axis passes through the center of the upper seat plate 505 in the ball joint support assembly 5, thereby realizing that the entire wheel assembly rotates along the axis of the rotating shaft 403, and the treads of the conical rollers 210 on both sides adaptively contact the annular track.

[0058] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the figures. Furthermore, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

[0059] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art without departing from the scope of the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A large, heavy-duty, high-precision rotary drive wheel set, characterized in that, The system includes a wheel seat body (1), a shaft base assembly (2), a support arm assembly (4), and a ball joint support assembly (5). The two shaft base assemblies (2) are respectively installed on both sides of the wheel seat body (1) and are used to drive the wheel seat body (1) to rotate. The ball joint support assembly (5) is installed on the upper surface of the wheel seat body (1). The support arm assembly (4) is installed on the wheel seat body (1) and cooperates with the ball joint support assembly (5) to support the turntable. The shaft base assembly (2) includes a shaft base body (201), a servo motor (202), a reducer (203), a wheel axle (205), a conical roller (210), and an encoder (215). The reducer (203), the wheel axle (205), and the conical roller (210) are all mounted on the shaft base body (201). The output end of the servo motor (202) is connected to the wheel axle (205) through the reducer (203) and is used to drive the wheel axle (205) to rotate. The wheel axle (205) passes through the conical roller (210) and moves synchronously with it. The input end of the encoder (215) is connected to the end encoder shaft of the wheel axle (205). The support arm assembly (4) includes a support arm (401), a base (402), a rotating shaft (403), a tapered roller bearing (404), and a spacer C (405). The support arm (401) is connected to the rotating shaft (403) and rotates synchronously. Both ends of the rotating shaft (403) are equipped with tapered roller bearings (404) through the spacer ring C (405). The tapered roller bearings (404) and the base (402) form a rotating pair connection. The rotating shaft (403) is installed on the base (402). The base (402) is connected to the wheel seat body (1). The ball joint support assembly (5) includes a lower seat plate (501), a spherical crown liner (502), a wear-resistant plate (503), a pressure ring (504), and an upper seat plate (505). The spherical crown liner (502) is positioned and connected to the lower seat plate (501) at the stop, the wear-resistant plate (503) is connected to the spherical crown liner (502), the upper seat plate (505) is hinged to the wear-resistant plate (503), the pressure ring (504) is connected to the lower seat plate (501) and is used to press the upper seat plate (505) and the wear-resistant plate (503) tightly together, and the lower seat plate (501) is connected to the upper end face of the wheel seat body (1); The center of the spherical crown liner (502) is located on the axis of the rotating shaft (403).

2. The large, heavy-duty, high-precision rotary drive wheel set according to claim 1, characterized in that, The shaft base assembly (2) also includes a mounting flange (204), a self-aligning roller bearing (207), and a flat key (211). One end of the mounting flange (204) is connected to the output end of the reducer (203), and the other end of the mounting flange (204) is connected to the shaft base body (201). The self-aligning roller bearing (207) is installed at both ends of the axle (205), and the tapered roller (210) is sleeved on the axle (205) through the flat key (211).

3. The large, heavy-duty, high-precision rotary drive wheel set according to claim 2, characterized in that, The shaft base assembly (2) also includes a locking nut (206), a spacer A (209) and a spacer B (212). The conical roller (210) is positioned and connected to the self-aligning roller bearings (207) on both sides respectively through the spacer A (209) and the spacer B (212), and is locked to the wheel axle (205) through the locking nut (206).

4. The large, heavy-duty, high-precision rotary drive wheel set according to claim 2, characterized in that, The shaft base assembly (2) also includes a bearing block (208), a bearing cover (213), and an encoder mounting component (214). The self-aligning roller bearings (207) on both sides are connected to the corresponding bearing blocks (208) and the shaft base body (201) as a rotating pair. The bearing blocks (208) and the bearing covers (213) are both connected to the shaft base body (201). The encoder mounting part (214) is connected to the bearing cover (213), and the encoder (215) is connected to the encoder mounting part (214).

5. The large, heavy-duty, high-precision rotary drive wheel set according to claim 1, characterized in that, The included angle between the axes of the two shaft base assemblies (2) is greater than zero.

6. The large, heavy-duty, high-precision rotary drive wheel set according to claim 1, characterized in that, It also includes a track cleaning assembly (3), which is installed on the outside of the wheel seat body (1) and is used to clean the running track of the rotary drive wheel assembly.

7. The large, heavy-duty, high-precision rotary drive wheel set according to claim 6, characterized in that, The track cleaning assembly (3) includes a track cleaning bracket (301), a scraper mounting plate (302), and a scraper (303). The track cleaning bracket (301) is connected to the wheel seat body (1), the scraper mounting plate (302) is connected to the bottom of the track cleaning bracket (301), and the scraper (303) is mounted on the scraper mounting plate (302).

Images