Spherical gimbal seat with high bearing capacity

Abstract

The invention discloses a high-bearing-capacity spherical gimbal seat, and belongs to the technical field of gimbal seats, the high-bearing-capacity spherical gimbal seat comprises a first flange assembly, a second flange assembly, a ball assembly, a first connecting assembly and a second connecting assembly, the first flange assembly comprises a first flange main body, and a plurality of first through holes are formed in the first flange main body; the device is easy to assemble and high in assembly precision; when an engine needs to swing, the first flange body rotates with the axis of the first pin shafts as the axis, the ball rotates in the constraint direction of the two pairs of first pin shafts and the two pairs of second pin shafts, and therefore the gimbal seat can independently rotate or jointly rotate in the two directions, and bidirectional swing is achieved. In the working process of an engine, thrust is borne and transmitted by the spherical surface, and the two first pin shafts and the two second pin shafts do not bear the thrust, so that the gimbal seat is not prone to bearing large bending moment in the using process, and the normal service life of the gimbal seat is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of gimbals, and in particular relates to a spherical gimbal with high load-bearing capacity. Background Art

[0002] Liquid rocket engines need to make precise attitude adjustments and heading changes during flight, which usually rely on the support and structural design of the gimbal to achieve the direction adjustment of the thrust vector. At present, the gimbals of small and medium-sized bidirectional swing engines generally adopt the cross-axis type. The cross-axis has a large span and is subjected to a large bending moment during operation, which affects the matching clearance, lubrication and movement of the bearings, resulting in increased contact stress, poor lubrication, increased friction, and possible jamming, which ultimately causes the reliability and life of the gimbal to decrease. At the same time, the traditional cross-axis gimbal is usually composed of multiple parts, and the assembly process requires precise alignment and connection to avoid assembly errors. The assembly process and maintainability are poor. Therefore, a new type of gimbal with simple structure, convenient assembly and high load-bearing capacity is needed to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a high-load-bearing-capacity spherical gimbal to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-load-bearing-capacity spherical gimbal, comprising a first flange assembly, a second flange assembly, a ball assembly, a first connecting assembly and a second connecting assembly, wherein the first flange assembly comprises a first flange body, wherein the first flange body is provided with a plurality of first through holes, the second flange assembly comprises a second flange assembly, wherein the second flange assembly is provided with a plurality of second through holes, the ball assembly comprises a sphere, wherein the bottom of the sphere is arranged in the first flange body, and the top of the sphere is arranged in the second flange assembly, and wherein the first flange body and the second flange assembly both have two waist-shaped holes.

[0005] By setting the above structure, the spherical gimbal uses a spherical force transmission structure, and the gimbal is easy to assemble and has high assembly accuracy; when the engine needs to swing, the first flange body rotates with the axis of the first pin shaft as the axis, and the sphere rotates in the direction constrained by the two pairs of first pin shafts and the two second pin shafts, thereby realizing the individual rotation or joint rotation of the gimbal in two directions and realizing bidirectional swing; during the operation of the engine, the thrust is borne and transmitted by the spherical surface, and the two first pin shafts and the two second pin shafts do not bear the thrust, so that the gimbal is not easy to bear a large bending moment during use, thereby ensuring the normal service life of the gimbal.

[0006] As a preferred solution, two first pin holes and two second pin holes are provided in the sphere.

[0007] As a preferred solution, the first connecting assembly includes two first pin shafts, and the two first pin shafts both pass through two waist-shaped holes in the first flange body, and the two first pin shafts are both inserted into the first pin holes.

[0008] As a preferred solution, the second connecting component includes two second pin shafts, and the two second pin shafts both pass through the two waist-shaped holes in the second flange component, and the two second pin shafts are both inserted into the second pin holes.

[0009] As a preferred solution, the two first pins and the two second pins are crossed in a "cross shape".

[0010] As a preferred solution, the first flange body and the second flange assembly are both configured as concave spherical flanges.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention moves the bottom of the sphere into the first flange body, and inserts the two first pins into the waist-shaped holes in the first flange body, then inserts the two first pins into the first pin holes, moves one end of the sphere into the second flange assembly, inserts the two second pins into the waist-shaped holes in the second flange assembly, and then inserts the two second pins into the second pin holes, at which time the gimbal can be assembled, and the gimbal is simple to assemble and has high assembly accuracy; when the engine needs to swing, the first flange body rotates with the axis of the first pin as the axis, and the sphere rotates in the directions constrained by the two pairs of first pins and the two second pins, thereby realizing the independent rotation or joint rotation of the gimbal in two directions and realizing bidirectional swinging; during the operation of the engine, the thrust is borne and transmitted by the spherical surface, and the two first pins and the two second pins do not bear the thrust, so that the gimbal is not easy to bear a large bending moment during use, thereby ensuring the normal service life of the gimbal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention in a front view;

[0014] Figure 2 It is a structural schematic diagram of the present invention;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention from the side;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention when viewed from above;

[0017] Figure 5 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0018] Figure 6 It is a cross-sectional view of the present invention in a swinging state.

[0019] In the figure: 1. first flange assembly; 101. first flange body; 102. first through hole; 2. second flange assembly; 201. second flange assembly; 202. second through hole; 3. ball assembly; 301. sphere; 302. first pin hole; 303. second pin hole; 4. first connecting assembly; 401. first pin shaft; 5. second connecting assembly; 501. second pin shaft; 6. waist-shaped hole. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the embodiments.

[0021] The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

[0022] See also Figure 1-6 The present invention provides a high-load-bearing spherical gimbal, comprising a first flange assembly 1, a second flange assembly 2, a ball assembly 3, a first connecting assembly 4 and a second connecting assembly 5. The first flange assembly 1 comprises a first flange body 101, in which a plurality of first through holes 102 are provided. The second flange assembly 2 comprises a second flange assembly 201, in which a plurality of second through holes 202 are provided. The ball assembly 3 comprises a sphere 301, the bottom of the sphere 301 is arranged in the first flange body 101, the top of the sphere 301 is arranged in the second flange assembly 201, and two waist-shaped holes 6 are provided in the first flange body 101 and the second flange assembly 201. Two first pin holes 302 and two second pin holes 303 are provided in the sphere 301, the first connecting component 4 includes two first pin shafts 401, the two first pin shafts 401 pass through the two waist-shaped holes 6 in the first flange body 101, and the two first pin shafts 401 are inserted into the first pin holes 302, the second connecting component 5 includes two second pin shafts 501, the two second pin shafts 501 pass through the two waist-shaped holes 6 in the second flange component 201, and the two second pin shafts 501 are inserted into the second pin holes 303, the two first pin shafts 401 and the two second pin shafts 501 are crossed in a "cross shape", and the first flange body 101 and the second flange component 201 are both configured as concave spherical flanges.

[0023] The working principle and use process of the present invention are as follows: the bottom of the sphere 301 is moved into the first flange body 101, and the two first pin shafts 401 are inserted into the waist-shaped holes 6 in the first flange body 101, and then the two first pin shafts 401 are inserted into the first pin hole 302, and one end of the sphere 301 is moved into the second flange assembly 201, and the two second pin shafts 501 are inserted into the waist-shaped holes 6 in the second flange assembly 201, and then the two second pin shafts 501 are inserted into the second pin hole 303, and then the gimbal can be assembled;

[0024] The first flange body 101 and the second flange assembly 201 are connected to the engine thrust chamber and the engine frame respectively, and use the concave spherical surface to form a spherical contact with the sphere 301, so as to bear and transmit the thrust when the engine is working. The waist-shaped holes 6 on both sides of the first flange body 101 and the second flange assembly 201 are connected to the ball assembly 3 through the first connecting assembly 4 and the second connecting assembly 5 respectively. When the thrust is transmitted, a small amount of displacement can be generated along the long axis of the waist-shaped hole 6, so that the spherical surface can be fully in contact;

[0025] When the engine is working, the thrust is transmitted from the first flange body 101 to the sphere 301, and then transmitted from the sphere 301 to the second flange assembly 201;

[0026] When the engine needs to swing, the first flange body 101 rotates with the axis of the first pin shaft 401 as the axis, and the two first pin shafts 401 and the two second pin shafts 501 form a "cross-shaped" cross axis, and the ball 301 rotates in the directions constrained by the two pairs of the two first pin shafts 401 and the two second pin shafts 501, so as to realize the independent rotation or joint rotation of the gimbal in two directions, and realize bidirectional swing;

[0027] During the operation of the engine, the thrust is borne and transmitted by the spherical surface, and the two first pins 401 and the two second pins 501 do not bear the thrust;

[0028] When the engine is not working, a small gap is generated between the spherical surfaces due to the engine's own weight. At this time, the two first pins 401 bear the engine's own weight.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-load-bearing-capacity spherical gimbal, comprising a first flange assembly (1), a second flange assembly (2), a ball assembly (3), a first connecting assembly (4) and a second connecting assembly (5), characterized in that: The first flange component (1) comprises a first flange body (101), wherein the first flange body (101) is provided with a plurality of first through holes (102); the second flange component (2) comprises a second flange component (201), wherein the second flange component (201) is provided with a plurality of second through holes (202); the ball component (3) comprises a sphere (301), wherein the bottom of the sphere (301) is arranged in the first flange body (101), and the top of the sphere (301) is arranged in the second flange component (201); and two waist-shaped holes (6) are provided in both the first flange body (101) and the second flange component (201).

2. A high load-bearing capacity spherical gimbal according to claim 1, characterized in that: Two first pin holes (302) and two second pin holes (303) are provided in the sphere (301).

3. A high load-bearing capacity spherical gimbal according to claim 1, characterized in that: The first connecting component (4) comprises two first pin shafts (401), and the two first pin shafts (401) both pass through two waist-shaped holes (6) in the first flange body (101), and the two first pin shafts (401) are both inserted into the first pin hole (302).

4. A high load-bearing capacity spherical gimbal according to claim 1, characterized in that: The second connecting component (5) comprises two second pin shafts (501), and the two second pin shafts (501) both pass through two waist-shaped holes (6) in the second flange component (201), and the two second pin shafts (501) are both inserted into the second pin holes (303).

5. The high load-bearing capacity spherical gimbal according to claim 1, characterized in that: The two first pin shafts (401) and the two second pin shafts (501) intersect in a "cross shape".

6. A high load-bearing capacity spherical gimbal according to claim 1, characterized in that: The first flange body (101) and the second flange assembly (201) are both configured as concave spherical flanges.

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