Crank motion platform

Abstract

The utility model provides a crank motion platform, and belongs to the technical field of machinery. A crank motion platform comprises a base and a platform, and the base and the platform are connected through three driving assemblies. The driving assembly comprises a driving motor, a speed reducer, a first driving arm, a second driving arm, a fisheye rod end knuckle bearing and a positioning piece, the driving motor is fixed to the base, the input end of the speed reducer is coaxially and fixedly connected with an output shaft of the driving motor, and the first driving arm is fixed to the output end of the speed reducer; the second driving arm is rotationally connected with the first driving arm, and the rod end of the fisheye rod end joint bearing is fixedly connected with the second driving arm; a plurality of connecting assemblies are fixed below the platform, each connecting assembly comprises two connecting pieces fixed below the platform, and a gap is formed between the two connecting pieces; the bearing portion of the fisheye rod end knuckle bearing is arranged in the interval, and the positioning piece penetrates through the connecting piece of the connecting assembly and the bearing portion of the fisheye rod end knuckle bearing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field, especially a crank movement platform. BACKGROUND

[0002] In the prior art, the movement platform in the VR field is mostly driven by multiple inclined hydraulic cylinders or electric cylinders, such as the six-degree-of-freedom platform mechanism shown in the patent with the patent number CN202111015661.8 and the name "Virtual Reality Motorcycle Simulation Driving System Based on Six-Degree-of-Freedom Platform".

[0003] However, when the user stands on the platform to perform various actions or installs some equipment on the platform, the additional load generated will greatly increase the load of these hydraulic cylinders or electric cylinders, which will further cause damage to them. Moreover, although the six-degree-of-freedom platform can complete more complex simulation actions, it has the disadvantages of high manufacturing cost and large size. Therefore, it is urgent to develop a new type of platform structure. SUMMARY

[0004] The utility model aims at the above problems existing in the prior art and provides a crank movement platform, which has

[0005] The utility model can be realized by the following technical scheme:

[0006] A crank movement platform comprises a base and a platform, wherein the base and the platform are connected through three driving assemblies; the driving assembly comprises a driving motor, a speed reducer, a first driving arm, a second driving arm, a fisheye rod end joint bearing, and a positioning piece; the driving motor is fixed on the base; the input end of the speed reducer is coaxially fixedly connected with the output shaft of the driving motor; the first driving arm is fixed on the output end of the speed reducer; the second driving arm is rotationally connected with the first driving arm; the rod end of the fisheye rod end joint bearing is fixedly connected with the second driving arm; a plurality of connecting assemblies are fixed below the platform; each connecting assembly comprises two connecting plates fixed below the platform, and the two connecting plates have a space therebetween; the bearing part of the fisheye rod end joint bearing is arranged in the space; and the positioning piece penetrates through the connecting plates of the connecting assembly and the bearing part of the fisheye rod end joint bearing.

[0007] In the above crank movement platform, the three driving assemblies are distributed in a circumferential array on the base.

[0008] In the above crank movement platform, the output end of the speed reducer is a connecting part arranged in a circular shape, and the first driving arm is fixedly connected with the connecting part through a plurality of bolts.

[0009] The first driving arm is fixed with a rotating shaft, the second driving arm is provided with a mounting hole, a bearing is mounted in the mounting hole, and the rotating shaft penetrates through the bearing and is connected with the inner ring of the bearing.

[0010] The interval is greater than the thickness of the bearing part of the fish-eye rod-end joint bearing, and the interval satisfies the swing range of the rod end of the fish-eye rod-end joint bearing.

[0011] The positioning member is a fixing bolt, the fixing bolt penetrates through the connecting piece and the bearing part of the fish-eye rod-end joint bearing and is fastened by a nut.

[0012] Compared with the prior art, the application has the following advantages:

[0013] The scheme can convert part of the position deviation caused by the load into the flexible adjustment of the joint bearing through the freedom degree compensation mechanism of the fish-eye rod-end joint bearing, reduce the direct load of the driving motor, the speed reducer and other core components, and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a three-dimensional structure diagram of the utility model;

[0015] Figure 2 is a structure diagram of the platform after tilting;

[0016] Figure 3 is another view of the platform after tilting;

[0017] Figure 4 is an explosion structure diagram of the driving assembly in the utility model;

[0018] Figure 5 is a platform movement process diagram in the utility model;

[0019] In the drawings,

[0020] 2, base;

[0021] 3, platform; 31, connecting assembly; 311, connecting piece; 312, interval;

[0022] 4, driving assembly; 41, driving motor; 42, speed reducer; 421, connecting part; 422, bolt; 43, first driving arm; 431, rotating shaft; 44, second driving arm; 441, mounting hole; 442, bearing; 45, fish-eye rod-end joint bearing; 451, rod end; 452, bearing part; 46, positioning member; 461, nut. DETAILED DESCRIPTION

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1 to 5 As shown, a crank motion platform 3 includes a base 2 and a platform 3, with the base 2 and platform 3 connected by three drive components 4. Each drive component 4 includes a drive motor 41, a reducer 42, a first drive arm 43, a second drive arm 44, a fisheye rod end joint bearing 45, and a positioning element 46. The drive motor 41 is fixed to the base 2, the input end of the reducer 42 is coaxially and fixedly connected to the output shaft of the drive motor 41, and the first drive arm 43 is fixed to the output end of the reducer 42. The second drive arm 44 is rotatably connected to the first drive arm 43, and the rod end of the fisheye rod end joint bearing 45 is fixedly connected to the second drive arm 44. Several connecting components 31 are fixed below the platform 3. Each connecting component 31 includes two connecting pieces 311 fixed below the platform 3, with a gap 312 between the two connecting pieces 311. The bearing portion 452 of the fisheye rod end joint bearing 45 is disposed within the gap 312, and the positioning element 46 passes through the connecting piece 311 of the connecting component 31 and the bearing portion 452 of the fisheye rod end joint bearing 45.

[0025] In this application, the rotational power output by the drive motor 41, after being adjusted by the reducer 42, drives the first drive arm 43 to rotate. The rotation of the first drive arm 43, in turn, causes the second drive arm 44 to swing in a planar motion. During actual movement, the platform 3 may tilt. In this case, the positional deviation of the platform 3 during movement can be compensated by the degree of freedom characteristics of the spherical rod end joint bearing 45, thereby realizing the tilting movement of the platform 3.

[0026] This solution may use the degree-of-freedom compensation mechanism of the fisheye rod end spherical bearing 45 to convert the position deviation caused by part of the load into the flexible adjustment of the spherical bearing, thereby reducing the direct load on core components such as the drive motor 41 and the reducer 42 and extending their service life.

[0027] The fisheye rod end spherical bearing 45 in this application is prior art and can be purchased directly from the market.

[0028] Specifically, the three drive components are arranged in a circumferential array on the base 2.

[0029] The three-drive assembly 4 forms a geometrically stable structure, which can suppress shaking through coordinated drive when the platform 3 tilts or swings. At the same time, it meets the basic requirements for tilting the platform 3, and the user experience can be close to that of the six-degree-of-freedom platform 3.

[0030] Specifically, the output end of the speed reducer 42 is a circularly arranged connecting part 421, and the first driving arm 43 is fixedly connected with the connecting part 421 through a plurality of bolts 422.

[0031] The circularly arranged connecting part 421 can increase the number of the bolts 422, in this application, the bolts 422 are totally 12 and are installed in a circumferential array, and the first driving arm 43 is fixed to the circular connecting part 421 through the plurality of bolts 422, so that the torque output by the motor can be dispersed to multiple connecting points to avoid that a single connecting point bears too large torque.

[0032] Specifically, the first driving arm 43 is fixed with a rotating shaft 431, the second driving arm 44 is provided with a mounting hole 441, a bearing 442 is mounted in the mounting hole 441, and the rotating shaft 431 passes through the bearing 442 and is connected with the inner ring of the bearing 442.

[0033] Through the mounting of the bearing 442, the second driving arm 44 is more smooth in the rotating process. In addition, a stop washer and a lock finger nut are sequentially arranged at the outer end of the rotating shaft 431, so as to lock the bearing 422 and prevent it from falling off.

[0034] Specifically, the width of the interval 312 is greater than the thickness of the bearing part 452 of the fish-eye rod end joint bearing 45, and the interval 312 satisfies the swing range of the rod end of the fish-eye rod end joint bearing 45.

[0035] The width of the interval 312 is greater than the thickness of the bearing part 452, so that mechanical interference between the fish-eye rod end joint bearing 45 and the structures on both sides can be avoided when the fish-eye rod end joint bearing 45 swings, for example, when the platform 3 is tilted, the rod end of the fish-eye rod end joint bearing 45 can freely swing in the interval 312, so as to ensure real-time compensation of the position deviation of the platform 3.

[0036] Specifically, the positioning member 46 is a fixing bolt 422, which passes through the connecting plate 311 and the bearing part 452 of the fish-eye rod end joint bearing 45 and is fastened through a nut 461.

[0037] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, the description related to "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the same, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. Meanwhile, the meaning of "and / or" appearing throughout the text is to include three schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes are satisfied at the same time. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0039] The above components are all general standard components or components known to those skilled in the art, and their structure and principle can be known by those skilled in the art through technical manuals or through conventional experimental methods.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A crankway motion platform (3) characterized in that, The utility model relates to a kind of fish-eye type three-dimensional platform, including: Base (2) and platform (3), the base (2) is connected with platform (3) by three drive assemblies (4);The drive assembly (4) includes drive motor (41), speed reducer (42), first drive arm (43), second drive arm (44), fish-eye rod end joint bearing (45), positioning part (46), the drive motor (41) is fixed on base (2), the input end of the speed reducer (42) is coaxially fixed connection with the output shaft of drive motor (41), the first drive arm (43) is fixed at the output end of the speed reducer (42);The second drive arm (44) is rotatably connected with the first drive arm (43), the rod end of the fish-eye rod end joint bearing (45) is fixedly connected with the second drive arm (44);Platform (3) is fixed with several connection assemblies (31) below, and connection assembly (31) includes two connection plates (311) fixed below platform (3), and there is interval (312) between two connection plates (311);The bearing part (452) of fish-eye rod end joint bearing (45) is arranged in interval (312), and the positioning part (46) passes through the connection plate (311) of connection assembly (31) and the bearing part (452) of fish-eye rod end joint bearing (45).

2. Crankway platform (3) according to claim 1, characterized in that Three drive assemblies (4) are distributed in the circumferential array on the base (2).

3. Crankway platform (3) according to claim 1, characterized in that The output end of the speed reducer (42) is the connection part (421) arranged in a circular shape, and the first drive arm (43) is fixedly connected with the connection part (421) by a plurality of bolts (422).

4. Crankway platform (3) according to claim 1, characterized in that The first drive arm (43) is fixed with a rotating shaft (431), the second drive arm (44) is provided with a mounting hole (441), a bearing (442) is installed in the mounting hole (441), and the rotating shaft (431) passes through the bearing (442) and is connected with the inner ring of the bearing (442).

5. Crankway platform (3) according to claim 1, characterized in that The width of the interval (312) is greater than the thickness of the bearing part (452) of the fish-eye rod end joint bearing (45), and the interval (312) satisfies the swing range of the rod end of the fish-eye rod end joint bearing (45).

6. Crankway platform (3) according to claim 1, characterized in that The positioning part (46) is a fixed bolt (422), the fixed bolt (422) passes through the connection plate (311), the bearing part (452) of the fish-eye rod end joint bearing (45) and is tightened by the nut (461).

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