Pinion and rack type inerter capable of eliminating backlash by using double gears

Abstract

The invention discloses a gear and rack type inerter capable of eliminating backlash through double gears, and belongs to the technical field of vibration control. Comprising a base, a rack and the like. The base is divided into three lattices with the same size, the rack is installed in the middle lattice, the large gear and the flywheel are installed in the lattices on the two sides respectively, and the first bearing seat, the second bearing seat, the third bearing seat and the fourth bearing seat are fixed to the base. A first anti-backlash gear shaft supported by a first bearing seat and a second bearing seat is parallel to a second anti-backlash gear shaft supported by a third bearing seat and a fourth bearing seat, the rack is connected with the base in a sliding mode, a gear is installed on one side of the first anti-backlash gear shaft, a flywheel is installed on the other side of the first anti-backlash gear shaft, a gear is installed on one side of the second anti-backlash gear shaft, and a large gear is installed on the other side of the second anti-backlash gear shaft. The gear on the second anti-backlash gear shaft is meshed with the rack, and the large gear is meshed with the gear on the first anti-backlash gear shaft. According to the inerter, the inertia coefficient of the inerter is efficiently amplified through gear speed-up transmission, and meanwhile, the precision of gear transmission is guaranteed through the effect of the anti-backlash gear shaft.

Description

Technical Field

[0001] The invention relates to a rack and pinion inertia container utilizing double gears to eliminate backlash, and belongs to the technical field of vibration control. Background Art

[0002] In 2002, Professor Smith of the University of Cambridge proposed the concept of an inertia chamber, breaking the limitation of grounding a mass element at one end. Since then, research on inertia chambers and vehicle suspensions consisting of an inertia chamber, damper, and spring has advanced significantly. Over the past decade or so, the field of inertia chambers has rapidly evolved, resulting in the emergence of a large number of effective inertia chamber models and suspensions incorporating inertia chambers.

[0003] Currently, there are several typical mechanisms for implementing inertial capacities, including ball screw, rack and pinion, hydraulic, and electromagnetic capacities. Among these, the rack and pinion type offers the simplest implementation mechanism and mechanical structure. This type of capacitive load primarily utilizes the meshing of a rack, pinion, and gear to drive the flywheel, thereby providing a large inertial coefficient. However, due to backlash between gears and between gears and racks during gear transmission, the mechanism exhibits poor tracking and wobbling during movement, severely impacting its accuracy. Furthermore, the transmission lag and impact caused by the clearance in traditional rack and pinion capacitive loads can result in discontinuous and uneven inertial force output by the capacitive load, making it difficult to accurately simulate the target inertial mass, thus reducing the effectiveness of vibration control or energy management. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a rack and pinion inertia container using double gears to eliminate backlash.

[0005] The technical solution adopted by the present invention is: a gear rack inertia container using double gears to eliminate backlash, including a base 2, a rack 11, an anti-backlash gear shaft 1 5, an anti-backlash gear shaft 2 8, a large gear 7, a bearing seat 1, a bearing seat 2 6, a bearing seat 3 9, a bearing seat 4 12, a flywheel 4, a guide flat key 13, a flat key 14, a flat key 2 15, a hinge seat 1 3, a hinge seat 2 10, and a limit ring 16.

[0006] Each side of bearing seat 1, bearing seat 2, bearing seat 3, and bearing seat 4 has a through-hole. The corresponding mounting location on base 2 also has a through-hole. The bearing seats are connected to base 2 via bolts and nuts. Rack 11 has a threaded hole on its backside, and a guide key 13 is fixed to rack 11 via screws. Base 2 is provided with a slide groove, and rack 11 moves horizontally along the slide groove on base 2 via guide key 13. The anti-backlash gear shaft 5 supported by bearing seat 1 and bearing seat 2, 6, and the anti-backlash gear shaft 2, 8 supported by bearing seat 3, 9, and bearing seat 4, 12 are parallel to each other and perpendicular to, but do not intersect, rack 11. The gear on the anti-backlash gear shaft 2 8 is meshed with the rack 11, and the anti-backlash gear shaft 2 8 is provided with a keyway, and the flat key 2 15 is placed in the keyway of the anti-backlash gear shaft 2 8. The large gear 7 is installed on the anti-backlash gear shaft 2 8, and the large gear 7 is also provided with a keyway. The large gear 7 and the anti-backlash gear shaft 2 8 are radially positioned by the flat key 2 15, and limiting rings 16 are installed on both sides of the anti-backlash gear shaft 2 8. The large gear 7 is meshed with the gear on the anti-backlash gear shaft 1 5, and the anti-backlash gear shaft 1 5 is provided with a keyway, and the flat key 14 is placed in the keyway of the anti-backlash gear shaft 1 5. The flywheel 4 is installed on the anti-backlash gear shaft 1 5, and the flywheel 4 is also provided with a keyway. The flywheel 4 and the anti-backlash gear shaft 1 5 are radially positioned by the flat key 14, and limiting rings 16 are installed on both sides of the anti-backlash gear shaft 2 8.

[0007] The base 2 is provided with four threaded holes, and the hinge seat 2 is provided with four through holes. The studs pass through the through holes of the hinge seat 2 10 and connect with the threaded holes on the base 2, thereby fixing the hinge seat 2 10 to the base 2. The base 2 has two through holes on the side, and the hinge seat 1 3 has two through holes. The studs pass through the through holes on the base 2 and hinge seat 1 3 and connect with bolts, thereby fixing the hinge seat 1 3 to the base 2.

[0008] Furthermore, the aforementioned bearing seat 1, bearing seat 2 6, bearing seat 3 9, and bearing seat 4 12 are identical, comprising a bearing base 101, a bearing 103, and a circlip 102. The bearing base 101 is provided with a bearing hole for mounting the bearing 103, and an annular groove for mounting the circlip 102. One side of the outer ring of the bearing 103 is in contact with the bottom surface of the bearing hole on the bearing base 101. The circlip 102 is mounted in the annular groove of the bearing base 101 and in contact with the other side of the outer ring of the bearing 103. The bearing 103 is fixed in the bearing hole of the bearing base 101 by being constrained on both sides.

[0009] Furthermore, the anti-backlash gear shaft 1 5 includes a movable gear 1 502, a gear shaft 1 501, a slider 1 503, a slider 2 505 and a spring 1 504. A square through hole is opened in the radial direction of the gear shaft 1 501. The slider 1 503 and the slider 2 505 are symmetrically installed in the square through hole. There are two cylinders on each of the slider 1 503 and the slider 2 505. The spring 1 504 is sleeved on the cylinders of the slider 1 503 and the slider 2 505. The movable gear 1 502 is installed on the gear shaft 1 501.

[0010] Furthermore, a column is provided on one side of the movable gear 502. When the slider 1 503 and the slider 2 505 slide, they push against the column on the movable gear 502. The movable gear 502 rotates around the gear shaft 1 501. The movable gear 502 and the gear on the gear shaft 1 501 are misaligned, thereby eliminating the meshing gap between the large gear 7 and the anti-backlash gear shaft 1 5.

[0011] Furthermore, the anti-backlash gear shaft 2 8 includes a movable gear 2 802, a gear shaft 2 801, a slider 3 803, a slider 4 805 and a spring 2 804. A square through hole is opened in the radial direction of the gear shaft 2 801. The slider 3 803 and the slider 4 805 are symmetrically installed in the square through hole. There are two cylinders on the slider 3 803 and the slider 4 805. The spring 1 804 is mounted on the cylinders of the slider 3 803 and the slider 4 805. The movable gear 2 802 is installed on the gear shaft 2 801.

[0012] Furthermore, a column is provided on one side of the movable gear 2 802, and the slider 3 803 and the slider 4 805 push against the column on the movable gear 2 801 when sliding. The movable gear 2 802 rotates around the gear shaft 2 801, and the movable gear 2 802 and the gear on the gear shaft 2 801 are misaligned, thereby eliminating the meshing gap between the rack 11 and the anti-backlash gear shaft 2 8.

[0013] Furthermore, the two columns on the movable gear 1 502 are symmetrical about the axis of the movable gear 1 502 , and the two columns on the movable gear 2 802 are symmetrical about the axis of the movable gear 2 802 .

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention proposes a rack and pinion inertia machine utilizing double gear backlash elimination, which utilizes the meshing transmission of the rack and pinion and the meshing transmission between the gears to convert the horizontal motion of the rack into the rotation of the flywheel, thereby achieving a mass amplification effect; 2. Flywheels of different sizes and materials can be flexibly replaced to meet the adjustment requirements of different working conditions; 3. The meshing tightness between the gears is enhanced, the transmission rigidity is strengthened, the system response speed is improved, the inertial force output by the inertia machine is ensured to be continuous and smooth, and the motion lag is reduced; 4. The impact and collision in the gear meshing are reduced, the backlash elimination avoids the tooth surface collision during gear reversing, reduces the acceleration noise and the self-ringing noise transmitted by the structural vibration, stabilizes the dynamic load, reduces the vibration amplitude, protects the internal components of the inertia machine, and extends the life of the parts; 5. The manufacturing and assembly are simple, the manufacturing cost is low, and it has high engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a rack and pinion inertial container using double gears to eliminate backlash; Figure 2 This is a front view of a rack and pinion inertial container structure using double gears to eliminate backlash; Figure 3 This is a bottom view of a rack and pinion inertial container structure utilizing double gears to eliminate backlash according to the present invention; Figure 4 This is a left sectional view of a gear shaft of a rack and pinion inertial container utilizing dual gears to eliminate backlash according to the present invention; Figure 5 This is a right sectional view of the second position of the anti-backlash gear shaft of a rack and pinion inertial container utilizing double gears for anti-backlash in the present invention; Figure 6 This is a schematic diagram of a backlash-eliminating gear shaft of a rack and pinion inertial container utilizing dual gears for backlash elimination according to the present invention; Figure 7 This is a front view of a backlash-eliminating gear shaft of a rack and pinion inertial container utilizing dual gears for backlash elimination according to the present invention; Figure 8 This is a left sectional view of a gear shaft of a rack and pinion inertial container utilizing dual gears for backlash elimination according to the present invention; Figure 9 This is a schematic diagram of a portion of the backlash-eliminating gear shaft of a rack and pinion inertial container utilizing dual gears for backlash elimination according to the present invention; Figure 10 This is a schematic diagram of the second anti-backlash gear shaft of a rack and pinion inertial container utilizing double gears for anti-backlash in the present invention; Figure 11 This is a front view of the gear shaft of a rack and pinion inertial container utilizing dual gears to eliminate backlash; Figure 12This is a right sectional view of the second gear shaft of the rack and pinion type inertial container utilizing double gears to eliminate backlash according to the present invention; Figure 13 This is a schematic diagram of a rack and pinion inertial container bearing seat utilizing dual gears to eliminate backlash according to the present invention; Figure 14 The present invention is a schematic diagram of a rack and pinion inertial container base that utilizes double gears to eliminate backlash.

[0016] The numbers in the figure are: 1-bearing seat one, 2-base, 3-hinge seat one, 4-flywheel, 5-anti-backlash gear shaft one, 6-bearing seat two, 7-large gear, 8-anti-backlash gear shaft two, 9-bearing seat three, 10-hinge seat two, 11-rack, 12-bearing seat four, 13-guide flat key, 14-flat key two, 15-flat key one, 16-limiting ring; 101-bearing base, 102-elastic retaining ring, 103-bearing, 501-gear shaft one, 502-moving gear one, 503-slider one, 504-spring one, 505-slider two, 801-gear shaft two, 802-moving gear two, 803-slider three, 804-spring two, 805-slider four. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are based on the technical solutions of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. In the following embodiments or examples, unless otherwise specified, functional components or structures are conventional components or conventional structures used in the art to achieve the corresponding functions.

[0018] Example 1: Figure 1-14 As shown, a rack and pinion inertia container using double gears to eliminate backlash includes a base 2, a rack 11, an anti-backlash gear shaft 1 5, an anti-backlash gear shaft 2 8, a large gear 7, a bearing seat 1 1, a bearing seat 2 6, a bearing seat 3 9, a bearing seat 4 12, a flywheel 4, a guide flat key 13, a flat key 14, a flat key 2 15, a hinge seat 1 3, a hinge seat 2 10, and a limit ring 16.

[0019] Each side of bearing seat 1, bearing seat 2, bearing seat 3, and bearing seat 4 has a through-hole. The corresponding mounting location on base 2 also has a through-hole. The bearing seats are connected to base 2 via bolts and nuts. Rack 11 has a threaded hole on its backside, and a guide key 13 is fixed to rack 11 via screws. Base 2 is provided with a slide groove, and rack 11 moves horizontally along the slide groove on base 2 via guide key 13. The anti-backlash gear shaft 5 supported by bearing seat 1 and bearing seat 2, 6, and the anti-backlash gear shaft 2, 8 supported by bearing seat 3, 9, and bearing seat 4, 12 are parallel to each other and perpendicular to, but do not intersect, rack 11. The gear on the anti-backlash gear shaft 2 8 is meshed with the rack 11, and the anti-backlash gear shaft 2 8 is provided with a keyway, and the flat key 2 15 is placed in the keyway of the anti-backlash gear shaft 2 8. The large gear 7 is installed on the anti-backlash gear shaft 2 8, and the large gear 7 is also provided with a keyway. The large gear 7 and the anti-backlash gear shaft 2 8 are radially positioned by the flat key 2 15, and limiting rings 16 are installed on both sides of the anti-backlash gear shaft 2 8. The large gear 7 is meshed with the gear on the anti-backlash gear shaft 1 5, and the anti-backlash gear shaft 1 5 is provided with a keyway, and the flat key 14 is placed in the keyway of the anti-backlash gear shaft 1 5. The flywheel 4 is installed on the anti-backlash gear shaft 1 5, and the flywheel 4 is also provided with a keyway. The flywheel 4 and the anti-backlash gear shaft 1 5 are radially positioned by the flat key 14, and limiting rings 16 are installed on both sides of the anti-backlash gear shaft 2 8.

[0020] Four threaded holes are provided on the base 2, and four through-holes are provided on the hinge base 2 (10). Studs pass through the through-holes on the hinge base 2 (10) and connect with the threaded holes on the base 2, thereby fixing the hinge base 2 (10) to the base 2. Two through-holes are provided on the side of the base 2, and two through-holes are provided on the hinge base 1 (3). Studs pass through the through-holes on the base 2 and hinge base 1 (3) and connect with bolts, thereby fixing the hinge base 1 (3) to the base 2.

[0021] In this example, bearing seat 1, bearing seat 2 6, bearing seat 3 9, and bearing seat 4 12 are the same. Figure 13 As shown, the bearing seat 1 includes a bearing base 101, a bearing 103, and a circlip 102. The bearing base 101 is provided with a bearing hole for mounting the bearing 103 and an annular groove for mounting the circlip 102. One side of the outer ring of the bearing 103 is in contact with the bottom surface of the bearing hole on the bearing base 101. The circlip 102 is installed in the annular groove of the bearing base 101 and in contact with the other side of the outer ring of the bearing 103. The bearing 103 is fixed in the bearing hole of the bearing base 101 by the constraints on both sides.

[0022] In this example, if Figure 6-9As shown, the anti-backlash gear shaft 1 (5) comprises a movable gear 1 (502), a gear shaft 1 (501), a slider 1 (503), a slider 2 (505), and a spring 1 (504). A square through-hole is radially defined in the gear shaft 1 (501), with sliders 1 (503) and 2 (505) symmetrically mounted within the through-hole. Sliders 1 (503) and 2 (505) each have two cylinders. Spring 1 (504) fits over the cylinders of sliders 1 (503) and 2 (505). The movable gear 1 (502) is mounted on the gear shaft 1 (501). A column is provided on one side of the movable gear 1 (502). As the sliders 1 (503) and 2 (505) slide, they push against the column on the movable gear 1 (502). The movable gear 1 (502) rotates around the gear shaft 1 (501), creating an offset between the movable gear 1 (502) and the gears on the gear shaft 1 (501), thereby eliminating the meshing clearance between the large gear 7 and the anti-backlash gear shaft 1 (5).

[0023] In this example, if Figure 10-12 As shown, the anti-backlash gear shaft 2 8 includes a movable gear 2 802, a gear shaft 2 801, a slider 3 803, a slider 4 805, and a spring 2 804. A square through hole is opened in the radial direction of the gear shaft 2 801. Sliders 3 803 and 4 805 are symmetrically mounted in the square through hole. Sliders 3 803 and 4 805 each have two cylinders. Spring 1 804 is sleeved on the cylinders of sliders 3 803 and 4 805. The movable gear 2 802 is mounted on the gear shaft 2 801. A column is provided on one side of the movable gear 2 802. When the sliders 3 803 and 4 805 slide, they press against the column on the movable gear 2 801. The movable gear 2 802 rotates around the gear shaft 2 801, causing the movable gear 2 802 to be misaligned with the gear on the gear shaft 2 801, thereby eliminating the meshing clearance between the rack 11 and the anti-backlash gear shaft 2 8.

[0024] It should be noted that the movable gear 1 502 is identical to the movable gear 2 802 , and the upper columns thereof are symmetrical about the gear axis.

[0025] The gear rack module affects the tooth root thickness, which directly impacts the gear rack's load-bearing capacity. Since inertia vessels are subject to significant impact loads in practical applications, a gear module of 2 is not recommended. The gear ratio between large gear 7 and anti-backlash gear shaft 5 is 3:1, ensuring a reasonable overall device size. The gear rack is constructed from 45 steel, with the tooth surfaces hardened.

[0026] In this example, if Figure 14As shown, the base 2 is a cuboid, divided into three grids of the same size, the rack 11 is installed in the middle grid with a sliding slot, the gear 7 and the flywheel 4 are respectively installed in the two side grids, so that the center of gravity of the overall structure is in the middle position, so as to minimize the error caused by the center of gravity in actual use and experimental research. The base 2 does not directly bear the impact load, and in order to reduce the overall mass of the inertial container, the material is selected as T6061 aluminum alloy with lower density than steel, which is convenient for processing.

[0027] The flywheel 4 is selected to meet the actual use of different working conditions, so that the inertial mass coefficient of the inertial container can be selected according to the situation, and a series of flywheels 4 with different diameters are designed for replacement.

[0028] It should be noted that the lower part of the rack 11 is connected and installed with a guide flat key 13 through bolts, which mainly plays two roles, one is to ensure that the movement of the rack 11 is a straight line, and the other is to limit the position, so that the rack does not slide beyond the limit position in the sliding slot and fall off, so as to avoid the occurrence of accidents.

[0029] The working principle of the present application is as follows: the entire inertial container is fixed on the object to be isolated by the hinge seat one 3 and the hinge seat two 10, and the rack 11 is fixed on the excitation source. When the rack 11 slides forward with the excitation source, the gear shaft one 501 and the gear shaft two 801 are engaged with the tooth profile, and the movement is transmitted. When the rack 11 slides reversely with the excitation source, the movable gear one 502 and the movable gear two 802 are engaged with the tooth profile, and the movement is transmitted, realizing zero backlash of gear transmission. At the same time, with the gear engagement transmission, the sliding of the rack 11 is converted into the rotation of the flywheel 4, which is equivalent to increasing the mass of the object to be isolated, thereby reducing the influence of the excitation source on the object to be isolated.

[0030] The inertial container amplifies the inertial mass coefficient of the inertial container through gear speed-up transmission, and at the same time, the effect of the anti-backlash gear shaft is utilized to ensure the precision of the gear transmission, effectively reducing the nonlinearity of the inertial mass coefficient caused by the gear backlash, and accurately simulating the target inertia mass.

[0031] The specific embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A rack and pinion inertial container utilizing dual gears to eliminate backlash, characterized in that: It includes a base (2), a rack (11), a first anti-backlash gear shaft (5), a second anti-backlash gear shaft (8), a large gear (7), a first bearing seat (1), a second bearing seat (6), a third bearing seat (9), a fourth bearing seat (12), and a flywheel (4); The base (2) is divided into three grids of the same size, the rack (11) is installed in the middle grid, the large gear (7) and the flywheel (4) are installed in the inside of the grids on both sides respectively, the bearing seat one (1), the bearing seat two (6), the bearing seat three (9), and the bearing seat four (12) are fixed on the base (2), the anti-backlash gear shaft one (5) supported by the bearing seat one (1) and the bearing seat two (6) and the anti-backlash gear shaft two (8) supported by the bearing seat three (9) and the bearing seat four (12) are parallel to each other, perpendicular to the rack (11) but not intersecting, the rack (11) and the base (2) are slidably connected, a gear is installed on one side of the anti-backlash gear shaft one (5), and a flywheel (4) is installed on the other side, a gear is installed on one side of the anti-backlash gear shaft two (8), and a large gear (7) is installed on the other side, the gear on the anti-backlash gear shaft two (8) is meshed with the rack (11), and the large gear (7) is meshed with the gear on the anti-backlash gear shaft one (5).

2. The rack and pinion inertial container utilizing dual gear backlash elimination according to claim 1, characterized in that: It also includes a guide flat key (13), a threaded hole is provided on the back of the rack (11), the guide flat key (13) is fixed on the rack (11), a slide groove is provided on the middle grid of the base (2), and the rack (11) slides horizontally on the slide groove on the base (2) through the guide flat key (13).

3. The rack and pinion inertial container utilizing dual gear backlash elimination according to claim 1, characterized in that: The bearing seat 1 (1), the bearing seat 2 (6), the bearing seat 3 (9), and the bearing seat 4 (12) are each provided with a through hole on both sides, and the corresponding installation position of the base (2) is also provided with a through hole, and the bearing seat is connected to the base (2) by bolts and nuts.

4. The rack and pinion inertial container utilizing dual gear backlash elimination according to claim 1, characterized in that: It also includes a flat key 1 (14) and a flat key 2 (15), wherein the anti-backlash gear shaft 2 (8) is provided with a keyway, and the flat key 2 (15) is placed in the keyway of the anti-backlash gear shaft 2 (8), and the large gear (7) is also provided with a keyway, and the large gear (7) and the anti-backlash gear shaft 2 (8) are radially positioned by the flat key 2 (15), and limiting rings (16) are installed on both sides of the anti-backlash gear shaft 2 (8), and the anti-backlash gear shaft 1 (5) is provided with a keyway, and the flat key 1 (14) is placed in the keyway of the anti-backlash gear shaft 1 (5), and the flywheel (4) is installed on the anti-backlash gear shaft 1 (5), and the flywheel (4) is also provided with a keyway, and the flywheel (4) and the anti-backlash gear shaft 1 (5) are radially positioned by the flat key 1 (14), and limiting rings (16) are installed on both sides of the anti-backlash gear shaft 1 (5).

5. The rack and pinion inertial container utilizing dual gears to eliminate backlash according to claim 1, characterized in that: Hinge seat 1 (3) and hinge seat 2 (10) are fixed to the front and rear ends of the base (2) respectively.

6. The rack and pinion inertial container utilizing dual gears to eliminate backlash according to claim 5, characterized in that: The rear end of the base (2) is provided with four threaded holes, the hinge seat 2 (10) is provided with four through holes, the studs pass through the through holes on the hinge seat 2 (10) and are connected with the threaded holes on the base (2), and the hinge seat 2 (10) is thus fixed on the base (2), the front end side of the base (2) is provided with two through holes, the hinge seat 1 (3) is provided with two through holes, the studs pass through the through holes on the base (2) and the hinge seat 1 (3) and are connected with the bolts, and thus the hinge seat 1 (3) is fixed on the base (2).

7. The rack and pinion inertial container utilizing dual gears to eliminate backlash according to claim 1, characterized in that: The base (2) is in the shape of a rectangular parallelepiped, and the material selected is T6061 aluminum alloy with a lower density than steel.

8. The rack and pinion inertial container utilizing dual gears to eliminate backlash according to claim 1, characterized in that: The bearing seat 1 (1), bearing seat 2 (6), bearing seat 3 (9), and bearing seat 4 (12) are the same, including a bearing base (101), a bearing (103), and an elastic retaining ring (102). The bearing base (101) is provided with a bearing hole for mounting the bearing (103), and an annular groove for mounting the elastic retaining ring (102). One side of the outer ring of the bearing (103) is fitted with the bottom surface of the bearing hole on the bearing base (101). The elastic retaining ring (102) is installed in the annular groove of the bearing base (101) and fits with the other side of the outer ring of the bearing (103). The bearing (103) is fixed in the bearing hole of the bearing base (101) by restrictions on both sides.

9. The rack and pinion inertial container utilizing dual gears to eliminate backlash according to claim 1, characterized in that: The anti-backlash gear shaft 1 (5) includes a movable gear 1 (502), a gear shaft 1 (501), a slider 1 (503), a slider 2 (505) and a spring 1 (504). The gear shaft 1 (501) is provided with a square through hole in the radial direction. The slider 1 (503) and the slider 2 (505) are symmetrically installed in the square through hole. The slider 1 (503) and the slider 2 (505) each have two cylinders. The spring 1 (504) is sleeved on the slider 1 (503) and the slider 2 (505). The movable gear 1 (502) is mounted on the gear shaft 1 (501). A vertical column is provided on one side of the movable gear 1 (502). When the slider 1 (503) and the slider 2 (505) slide, they push against the vertical column on the movable gear 1 (502). The movable gear 1 (502) rotates around the gear shaft 1 (501). The movable gear 1 (502) and the gear on the gear shaft 1 (501) are misaligned, thereby eliminating the meshing clearance between the large gear (7) and the anti-backlash gear shaft 1 (5).

10. The rack and pinion inertial container utilizing dual gears to eliminate backlash according to claim 1, characterized in that: The anti-backlash gear shaft 2 (8) includes a movable gear 2 (802), a gear shaft 2 (801), a slider 3 (803), a slider 4 (805) and a spring 2 (804). A square through hole is opened in the radial direction of the gear shaft 2 (801). The slider 3 (803) and the slider 4 (805) are symmetrically installed in the square through hole. The slider 3 (803) and the slider 4 (805) each have two cylinders. The spring 1 (804) is sleeved on the slider 3 (803) and the slider 4 (805). The movable gear 2 (802) is mounted on the cylinder of the gear shaft 2 (801). A column is provided on one side of the movable gear 2 (802). The slider 3 (803) and the slider 4 (805) push against the column on the movable gear 2 (801) when sliding. The movable gear 2 (802) rotates around the gear shaft 2 (801). The movable gear 2 (802) and the gear on the gear shaft 2 (801) are misaligned, thereby eliminating the meshing clearance between the rack (11) and the anti-backlash gear shaft 2 (8).

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