Limiting structure and multi-shaft rotary table with same

Abstract

The utility model relates to a limit structure and a multi-axis rotary table with the limit structure, the limit structure is arranged on the multi-axis rotary table, the multi-axis rotary table further comprises a fixed plate and a rotary table, and the limit structure comprises a hard limit shifting block arranged on the fixed plate; and a reverse limiting column and a forward limiting column which are matched with the hard limiting shifting block for use and are used for mechanically limiting the rotating body are arranged on the rotating body. The safety limiting structure with the rotation angle exceeding + / -180 degrees is small in size, simple in structure and easy to install, and solves the problem that a sliding block and a buffer cannot be installed under the condition of narrow space, so that the rotation angle exceeding + / -180 degrees is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication antenna technical field, belong to the field of communication antenna with limit two -dimensional turntable control, especially in communication antenna with limit two -dimensional turntable control, a kind of limit structure and the multi-axis turntable with the limit structure of this limit structure. BACKGROUND

[0002] Communication antenna with limit two -dimensional turntable is a kind of high-precision pointing adjustment mechanism, currently, multi-axis turntable rotation protection measure is mostly used mechanical limit, the structure of mechanical limit is basically through the limit protrusion installed on rotating table and limit assembly installed on fixed base collide each other to realize, when rotating angle exceeds 360 °, it needs to set two-stage limit of different length, cooperate two buffers to complete wide rotation, and installation occupies larger space (space is narrow, it is impossible to install slider and buffer), it is difficult to meet the installation requirement of heavy-duty turntable, it is not conducive to installation and maintenance. SUMMARY

[0003] Therefore, the utility model provides a kind of limit structure and the multi-axis turntable with the limit structure of this limit structure, to solve the problems in prior art.

[0004] Specifically, a kind of limit structure of the utility model, the limit structure is set on multi-axis turntable, the multi-axis turntable further includes fixed plate and rotating table, the limit structure includes:

[0005] Hard limit knob is set on the fixed plate;

[0006] Reverse limit column and positive limit column for being used for the mechanical limit of rotating table are set on the rotating table and cooperate with hard limit knob.

[0007] On the basis of above-mentioned scheme, further include: reverse limit switch for being used for the electrical limit of rotating table is set on the reverse limit column and positive limit switch for being used for the electrical limit of rotating table is set on the positive limit column.

[0008] On the basis of above-mentioned scheme, the hard limit knob includes:

[0009] Hard limit housing is set on the fixed plate;

[0010] Hard limit shaft is set on the hard limit housing;

[0011] Low limit knob and high limit knob for being used for cooperating with reverse limit column, positive limit column, reverse limit switch or positive limit switch are rotationally arranged on the hard limit shaft.

[0012] On the basis of above-mentioned scheme, notch for avoiding positive limit switch false touch is set on the high limit knob.

[0013] On the basis of the above scheme, the included angle of the low limit block and the high limit block is 90°.

[0014] On the basis of the above scheme, further comprising: the damping structure arranged on the hard limit pivot shaft of the hard limit block for axially limiting the low limit block and the high limit block.

[0015] On the basis of the above scheme, the damping structure comprises a nitrile rubber sealing ring arranged between the high limit block and the hard limit shell and a hard limit washer arranged between the low limit block and the hard limit shell.

[0016] In addition, the utility model still provides a multi -shaft rotary table, including fixed plate and rotary table, still include the limit structure of limit structure.

[0017] The utility model discloses two limit posts cooperate with the hard limit block, can realize the limit of multi -shaft rotary table, and the structure is relatively simple and reliable, and the overall structure is smaller, and the processing and assembly difficulty are all lower, and the combination buffer of electrical limit and mechanical limit realizes two -stage protection, effectively prevents the damage of direct impact to rotary table, prolongs rotary table service life, simultaneously, whole mechanism arrangement is in the equipment outside, can conveniently observe and brings great convenience to debugging personnel operation, and convenient maintenance or spare part replacement. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the present utility. The same reference numerals in the drawings indicate the same components. In the drawings:

[0019] Figure 1 It is the structure schematic view of limit structure in the utility model;

[0020] Figure 2 It is the structure schematic view (solid drawing) of hard limit block in the utility model;

[0021] Figure 3 It is the structure schematic view of hard limit block in the utility model;

[0022] Figure 4 It is Figure 3 C-C section view (damping structure is shown) of

[0023] Figure 5 It is the structure schematic view of zero position state in the utility model;

[0024] Figure 6This is a structural schematic diagram of the reverse hard-limit collision state in this utility model;

[0025] Figure 7 This is a structural schematic diagram of the reverse limiting state in this utility model, wherein (a) is an elevation view and (b) is a plan view;

[0026] Figure 8 This is a structural schematic diagram of the positive limiting post in the reset state of this utility model, wherein (a) is an elevation view and (b) is a plan view;

[0027] Figure 9 This is a structural schematic diagram of the positive hard-limit collision state in this utility model;

[0028] Figure 10 This is a structural schematic diagram of the reverse limiting post in the reset state of this utility model, wherein (a) is an elevation view and (b) is a plan view. Detailed Implementation

[0029] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] like Figure 1 As shown, this application provides a specific embodiment of a limiting structure with a rotation angle exceeding ±180°. The limiting structure is mounted on a multi-axis turntable, which also includes a fixed plate 1 and a rotating platform 3. The limiting structure with a rotation angle exceeding ±180° includes a rigid limiting block 2 mounted on the fixed plate 1, a reverse limiting post 4 mounted on the rotating platform 3 that cooperates with the rigid limiting block 2 to limit the secondary rotation stroke of the rotating platform 3, and a forward limiting post 5 that cooperates with the rigid limiting block 2 to limit the secondary rotation stroke of the rotating platform 3. A reverse limiting switch 6 for electrically limiting the primary rotation stroke of the rotating platform 3 is mounted on the reverse limiting post 4, and a forward limiting switch 7 for electrically limiting the primary rotation stroke of the rotating platform 3 is mounted on the forward limiting post 5. In the zero-position state, the reverse limiting post 4 and the forward limiting post 5 are located on both sides of the rigid limiting block 2.

[0032] When the reverse limiting column 4 / forward limiting column 5 is in front of the collision hard limiting block 2, the reverse limiting switch 6 / forward limiting switch 7 is first used, the electrical appliance switch closing signal is collected, the multi-axis turntable is powered off after receiving the electrical signal, and the mechanical hard limiting is used by the inertia of the turntable. Among them, the size of the reverse limiting column 4, the forward limiting column 5 and the hard limiting block 2 is related to the diameter of the rotating table 3, and the two do not occur when the normal dialing reset occurs, effectively ensuring the reliability of the hard limiting block 2.

[0033] As shown in Figures 2-3 , as a specific embodiment of the hard limiting block 2, the hard limiting block 2 includes a hard limiting shell 2-1 provided on the fixed plate 1, a hard limiting shaft 2-6 provided on the hard limiting shell 2-1, a low limiting block 2-2 and a high limiting block 2-3 rotatably provided on the hard limiting shaft 2-6. Among them, the high limiting block 2-3 is provided with a notch 2-3-1 for avoiding the false touch of the forward limiting switch 7.

[0034] Specifically, the included angle of the low limiting block 2-2 and the high limiting block 2-3 is 90°, and the low limiting block 2-2 and the high limiting block 2-3 have height difference (as shown in Figure 2 , the low limiting block 2-2 and the high limiting block 2-3 are installed on the hard limiting shaft 2-6 in turn).

[0035] In order to prevent the hard limiting block 2 from moving in position during transportation, causing the limiting angle range to abnormally collide in advance, it also includes a damping structure provided on the hard limiting shaft 2-6 of the hard limiting block, as shown in Figure 4 , the damping structure includes a butyl rubber sealing ring 2-4 provided between the high limiting block 2-3 and the hard limiting shell 2-1 and a hard limiting washer 2-5 provided between the low limiting block 2-2 and the hard limiting shell 2-1, and the deformation force of the butyl rubber sealing ring 2-4 in the groove of the hard limiting block 2 is used to ensure that the hard limiting block 2 does not shake during transportation.

[0036] When working, as shown in Figure 5 , at this time, the zero position state, the hard limiting block 2 is fixed, the forward limiting column 5 and the reverse limiting column 4 rotate counterclockwise with the rotating table 3, the forward limiting column 5 is a long column, first contacts with the low limiting block 2-2, and then the low limiting block 2-2 is turned into the hard limiting shell 2-1, so that the high limiting block 2-3 is exposed from the hard limiting shell 2-1; as shown in Figure 6 , after rotating for a period of angle, the reverse limiting switch 6 contacts with the high limiting block 2-3, the reverse limiting switch 6 is closed, the motor is powered off, and the multi-axis turntable stops rotating; under the action of inertia, as shown in Figure 7 , the reverse limiting column 4 contacts with the high limiting block 2-3 (in order to better display, Figure 7 , the angle of view of the hard limiting block 2 inFigure 5 (From the rear view), the mechanical hard limit takes effect, and at this time the reverse limit function has been completed.

[0037] After the reverse limit function is completed, the rotation can be reversed. The reverse limit post 4 disengages from the high limit block 2-3, the reverse limit switch 6 disconnects its electrical signal, and after rotating a certain angle, the forward limit post 5 re-moves the high limit block 2-3. At this time, the hard limit block 2 is reset (the low limit block 2-2 protrudes from the hard limit housing 2-1, and the high limit block 2-3 enters the hard limit housing 2-1). Figure 8 As shown (for better display), Figure 7 The viewing angle of the medium hard limit block 2 is Figure 6 (Rear view). To prevent accidental activation of the positive limit switch 7, which could cause abnormal rotation of the turntable, a notch 2-3-1 is made inside the high limit switch block 2-3 to prevent accidental activation.

[0038] After rotating clockwise to a certain angle, the forward limit switch 7 contacts the high limit block 2-3, the forward limit switch 7 closes, the motor is powered off, and the multi-axis turntable stops rotating. Under inertia, the forward limit post 5 contacts the low limit block 2-2. Figure 9 and Figure 10 As shown, the positive limit function has been completed at this point.

[0039] The above is a complete cycle of the limiting device. During this process, the forward limiting post 5 contacts the hard limiting block 2 multiple times. The forward limiting post 5 needs to be specially surface-treated. High-strength material should be selected and special surface treatment should be performed to improve its wear resistance and strength, thereby extending the service life of the limiting structure.

[0040] Example 2

[0041] Based on Embodiment 1, this utility model provides a multi-axis turntable, including a fixed plate 1 and a rotating platform 3, and further including a limiting structure with a rotation angle exceeding ±180° as described in Embodiment 1 installed on the multi-axis turntable. In this embodiment, the multi-axis turntable achieves limiting by using the limiting structure with a rotation angle exceeding ±180° installed on the rotating platform 3.

[0042] This utility model features a limiting structure with a rotation angle exceeding ±180°. It employs two limiting posts in conjunction with a hard limiting block 2 to achieve limiting of the multi-axis turntable. The structure is relatively simple and reliable, with a small overall size, and low processing and assembly difficulty. The combination of electrical and mechanical limiting provides buffering, achieving dual-level protection and effectively preventing damage to the multi-axis turntable from direct impacts, thus extending the turntable's service life. At the same time, the entire mechanism is located outside the equipment, facilitating easy observation and greatly simplifying operation for commissioning personnel, as well as maintenance or parts replacement.

[0043] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A limiting structure, wherein the limiting structure is disposed on a multi-axis turntable, the multi-axis turntable further comprising a fixed plate (1) and a rotating platform (3), characterized in that, The limiting structure includes: A hard limit block (2) is provided on the fixed plate (1); The rotary table (3) is provided with a reverse limiting post (4) and a forward limiting post (5) that work in conjunction with the hard limiting block (2) to mechanically limit the rotary table (3).

2. The limiting structure according to claim 1, characterized in that, Also includes: A reverse limit switch (6) for electrically limiting the rotary table (3) is provided on the reverse limit post (4), and a forward limit switch (7) for electrically limiting the rotary table (3) is provided on the forward limit post (5).

3. The limiting structure according to claim 2, characterized in that, The hard limit block (2) includes: A rigid limiting housing (2-1) is provided on the fixed plate (1); A hard-limiting rotating shaft (2-6) is provided on the hard-limiting housing (2-1); The hard limit pivot (2-6) is rotatably equipped with a low limit block (2-2) and a high limit block (2-3) for use in conjunction with the reverse limit post (4), the forward limit post (5), the reverse limit switch (6) or the forward limit switch (7).

4. The limiting structure according to claim 3, characterized in that, The high limit switch (2-3) is provided with a notch (2-3-1) to prevent the positive limit switch (7) from being accidentally activated.

5. The limiting structure according to claim 3, characterized in that, The included angle between the lower limit stop block (2-2) and the higher limit stop block (2-3) is 90°.

6. The limiting structure according to claim 3, characterized in that, Also includes: A damping structure is provided on the hard limit pivot (2-6) of the hard limit block (2) for axially limiting the low limit block (2-2) and the high limit block (2-3).

7. The limiting structure according to claim 6, characterized in that, The damping structure includes a nitrile sealing ring (2-4) disposed between the high limit block (2-3) and the hard limit housing (2-1) and a hard limit washer (2-5) disposed between the low limit block (2-2) and the hard limit housing (2-1).

8. A multi-axis rotary table, comprising a fixed plate (1) and a rotary table (3), characterized in that, It also includes the limiting structure as described in any one of claims 1-7.

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