CN104810619A - Phase shifter transmission device - Google Patents

Abstract

A phase shifter transmission device is provided with at least two worm gears which are linearly arranged, each worm gear is connected with a phase shifter, a driving rod and a screw rod which can respectively control rotation are arranged along the arrangement direction of the worm gears, a worm which can slide along the driving rod but can not relatively rotate is arranged on the driving rod, a shifting piece which is in threaded connection with the screw rod is arranged on the screw rod, and the worm is connected with the shifting piece and can slide along the driving rod under the driving of the shifting piece so as to be meshed with different worm gears. The transmission device drives the phase shifters respectively, and compared with the original mode, the transmission device saves the using number of motors, reduces the volume of the antenna and greatly reduces the cost.

Description

A phase shifter transmission

technical field

The present invention relates to a transmission device in a mobile communication antenna, specifically a transmission device for driving a phase shifter in a mobile communication antenna.

Background technique

The radiation angle of the mobile communication antenna needs to be adjusted according to the change of the main source of the antenna, and the method is to adjust the phase shifter in the antenna by driving the transmission device. There are often many phase shifters in a mobile communication antenna, and these phase shifters often need to be adjusted differently. At present, most of the phase shifter driving devices on the market are one-to-one. One motor controls one phase shifter independently. To realize the separate adjustment of multiple phase shifters, multiple motors need to be configured. Because the motor is expensive and heavy , not only leads to bulky antenna, but also increases the cost.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned defects and provide a phase shifter transmission device capable of individually controlling a plurality of phase shifters.

The technical solution adopted by the present invention to solve the above technical problems is: a phase shifter transmission device, which is provided with at least two worm gears arranged in a straight line, each worm gear is connected with a phase shifter, and along the direction of the worm gear arrangement, a The driving rod and the screw are respectively controlled to rotate. A worm that can slide along it but not relatively rotate is arranged on the driving rod, and a paddle threadedly connected with it is provided on the screw rod. The worm is connected with the paddle, and The paddle can slide along the drive rod to engage different worm gears.

By controlling the speed of the drive rod and the screw, the distance that the worm slides along the drive rod per rotation is equal to the tooth pitch of the worm, so as not to interfere with the worm when it passes the worm wheel.

Each worm wheel is correspondingly provided with a locking device, and the locking device has a spring and a locking block that can be inserted into the locking hole provided on the end surface of the worm wheel under the action of the spring.

Both sides of the locking block are provided with guiding slopes, and the plectrum can squeeze the locking block through the guiding slopes during the moving process, and make it withdraw from the locking hole.

The locking device is provided with a guide shaft for guiding the reciprocating movement of the locking block.

The cross-section of the central hole of the worm is the same as that of the driving rod, and the worm and the driving rod are circumferentially positioned through matching protrusions and grooves.

The end of the worm is in the shape of a stepped shaft, and one end of the paddle is matched with the shoulder of the stepped shaft.

One end of the plectrum has a semi-cylindrical opening, which is matched with the shoulder of the stepped shaft at the end of the worm.

The drive rod and the screw are respectively equipped with motors for driving them to rotate.

The beneficial effect of the present invention is that the horizontal and rotational movements of the worm are respectively controlled by the screw and the drive rod, and the worm is moved to the corresponding worm wheel, and the phase shifter connected to the worm wheel can be individually controlled, thereby realizing a transmission device respectively Drive multiple phase shifters. Its power source only needs to control the driving rod and the screw separately, and a maximum of two motors can be used to control multiple phase shifters. Compared with the original method, the number of motors used is saved, the volume of the antenna can be reduced, and the cost is greatly reduced.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a schematic diagram of the setting method of the guide slope on the locking block.

Fig. 4 is a schematic diagram of the arrangement of the stepped shaft-shaped end of the worm.

Fig. 5 is a schematic diagram of a semi-cylindrical opening on the plectrum.

Marks in the figure: 1. Housing, 2. Pick, 3. Worm, 4. Worm wheel, 5. Drive rod, 6. Screw, 7. Locking block, 8. Spring, 9. Guide slope, 10. Shaft shoulder Ministry, 11, opening.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in the figure, a phase shifter transmission device is provided with at least two worm gears 4 arranged in a straight line, and each worm gear 4 is connected with a phase shifter. The embodiment in Fig. 1 is an implementation of controlling six phase shifters, in order to show the locking device at the rear of the worm wheel, one of the worm wheels is omitted in the figure. Along the direction in which the worm gears 4 are arranged, a drive rod 5 and a screw 6 capable of controlling the rotation are provided. The driving rod 5 and the screw rod 6 are parallel to each other, and are installed together with the worm wheel 4 in a housing. A worm 3 is provided on the driving rod 5 and can slide along it but cannot rotate relative to it. In order to ensure smooth movement, the section of the central hole of the worm 3 is the same as that of the driving rod 5 . Any suitable method can be adopted to ensure that the worm 3 and the driving rod 5 do not rotate relative to each other, for example, the worm and the driving rod are circumferentially positioned through matching protrusions and grooves (keys or keyways). A plectrum 2 threadedly connected to the screw 6 is provided, and the worm 3 is in contact with the plectrum 2 . The plectrum 2 is provided with an internal thread that cooperates with the screw 6. When the screw 6 rotates, the plectrum 2 cannot rotate due to being restricted by the worm 3. Therefore, by turning the screw 6, the plectrum 2 can be moved left and right along it, so that the worm 3 Driven by the plectrum 2 , it can slide along the drive rod 5 so as to engage with different worm gears 4 . Any feasible way can be used to make the plectrum 2 drive the worm 3 without affecting its rotation. For example, a bearing is set on the plectrum 2, and the end of the worm screw 3 is placed in the bearing. Alternatively, as shown in Figures 4 and 5, the end of the worm 3 is arranged in the shape of a stepped shaft, and one end of the plectrum 2 is matched with the shoulder of the stepped shaft. Furthermore, one end of the plectrum 2 can be set to have a semi-cylindrical opening, which is matched with the shoulder of the stepped shaft at the end of the worm 3 .

When the worm 3 slides to mesh with one of the worm gears 4 and stops, the worm gear 4 can be driven to rotate by turning the worm 3 , and then the corresponding phase shifter can be adjusted. When selecting the worm gear 4 to be adjusted, the worm screw 3 usually passes through several worm gears that do not need to be adjusted. In order to prevent the worm 3 from interfering with the worm wheels that do not need to be adjusted, the speed of the drive rod 5 and the screw 6 can be controlled so that the distance that the worm 3 slides along the drive rod 5 per rotation is equal to the pitch of the worm 3 . The principle is that, assuming that the worm and the worm gear are meshed at rest, the worm gear rotates one tooth every time the worm rotates, that is, the worm gear is displaced by a tooth pitch P1, and if the worm is moved by a distance P1 in the opposite direction, the worm wheel can remain stationary , so that the worm can pass through any worm wheel without interference. The distance the worm moves can be controlled as follows. The first way: by designing the pitch of the transmission screw 6 to be P1, the movement of the worm is P1 when the transmission screw 6 rotates once. The second method: if the pitch of the transmission screw 6 is not equal to P1, the moving amount of the worm can be P1 by adjusting the speed of the stepping motor.

When the phase shifter is not adjusted, in order to prevent the worm gear from rotating, a locking device can be configured for each worm gear, and the locking device has a spring 8 and a locking device that can be inserted into the end surface of the worm gear 4 under the action of the spring 8. Locking block 7 in the hole. The shape of the locking block and the locking hole can be set as required, as long as its function can be realized. Cylindrical protrusion inserted into locking hole. Further, there are guide slopes 9 on both sides of the locking block 7, and the plectrum 2 can press the locking block 7 through the guide slopes during the moving process, and make it withdraw from the locking hole, so that the worm can move When reaching the position of meshing with the worm gear, the corresponding worm gear is automatically unlocked. The locking device can also be provided with a guide shaft for guiding the reciprocating movement of the locking block 7 to ensure its precise action.

In the transmission device of the present invention, the drive rod 5 and the screw rod 6 only need to be equipped with motors for driving their rotation to realize the control of multiple phase shifters. Figure 1 and Figure 2 show the embodiment of controlling 6 phase shifters. According to actual needs, 5, 8, or even more phase shifters can also be set.

Claims (9)

1. A phase shifter transmission device, characterized in that: there are at least two worm gears (4) arranged in a straight line, each worm gear (4) is connected with a phase shifter, and along the arrangement direction of the worm gears (4) there are The driving rod (5) and the screw (6) that can control the rotation respectively are set on the driving rod (5) with a worm (3) that can slide along it but cannot rotate relative to it, and on the screw (6) there is a The paddle (2) is threaded, the worm (3) is in contact with the paddle (2), and can slide along the drive rod (5) driven by the paddle (2) so as to be compatible with different worm gears (4) engage. 2. A phase shifter transmission device as claimed in claim 1, characterized in that: by controlling the rotational speed of the drive rod (5) and the screw (6), the worm (3) can rotate along the drive rod (5) every time it rotates The sliding distance is equal to the tooth pitch of the worm (3) so as not to interfere with the worm (3) passing the worm wheel (4). 3. A phase shifter transmission device according to claim 1 or 2, characterized in that: each worm wheel (4) corresponds to a locking device, and the locking device has a spring (8) and a Insert the locking block (7) into the locking hole provided on the end face of the worm wheel (4) under the action of the spring (8). 4. A phase shifter transmission device according to claim 3, characterized in that: there are guide slopes (9) on both sides of the locking block (7), and the paddle (2) can be moved during the movement process. Squeeze the locking block (7) through this guide bevel and let it exit the locking hole. 5. A phase shifter transmission device according to claim 3, characterized in that: said locking device is provided with a guide shaft for guiding the reciprocating movement of the locking block (7). 6. A phase shifter transmission device according to claim 1 or 2, characterized in that: the cross-section of the central hole of the worm (3) is the same as that of the drive rod (5), and the worm and the drive rod pass through to match The protrusions and grooves are positioned circumferentially. 7. A phase shifter transmission device according to claim 1 or 2, characterized in that: the end of the worm (3) is in the shape of a stepped shaft, and one end of the plectrum (2) is aligned with the shaft of the stepped shaft Shoulder fit. 8. A phase shifter transmission device according to claim 7, characterized in that: one end of the plectrum (2) has a semi-cylindrical opening, which is in contact with the shoulder of the stepped shaft at the end of the worm (3) Ministry of cooperation. 9. A phase shifter transmission device according to claim 1 or 2, characterized in that: the drive rod (5) and the screw rod (6) are respectively equipped with motors for driving their rotation.