Automatic clearance adjusting device for miniature gearbox

Abstract

The invention discloses an automatic clearance adjusting device for a miniature gearbox, and relates to the technical field of miniature gearboxes, the automatic clearance adjusting device comprises a first gear and a second gear, the first gear and the second gear are split of a whole gear, the second gear is connected with a connecting column, and an adjusting clamping strip is connected between the connecting column and the first gear; according to the automatic clearance adjusting device for the miniature gear box, a gear is divided into a first gear and a second gear, a connecting column, an adjusting clamping strip and a spring piece are connected to the second gear, the first gear and the second gear can be connected, a driving motor in a first driving part can drive the adjusting clamping strip to move through control of external equipment, and therefore the first gear and the second gear can be adjusted. The distance between the first gear and the second gear is shortened, the tooth width is increased, abnormal sound caused by the fact that vibration is transmitted to a bearing due to abnormal gear clearance caused by serious abrasion is avoided, adjustment is convenient, tedious operation steps are avoided, and the device is more efficient in use.

Description

Technical Field

[0001] The invention relates to the technical field of micro gear boxes, and in particular to an automatic clearance adjustment device for a micro gear box. Background Art

[0002] The existing automatic clearance adjustment device for micro gearboxes still has the following drawbacks in actual use:

[0003] The micro gearbox is a widely used precision transmission device. During the operation of the micro gearbox, the clearance changes due to gear wear or other reasons, and the direction and amplitude that need to be adjusted are determined. The high-precision spring works in a compressed or stretched state for a long time, which will produce fatigue and cause the elastic coefficient to change. When the spring elastic coefficient changes, the elastic force it provides is difficult to meet the requirements of accurately adjusting the gear clearance, and the adjusted clearance may still not meet the standard, affecting the transmission accuracy and stability of the gearbox. Moreover, in extreme environments such as high temperature, high humidity, and strong corrosion, the aluminum alloy gearbox body may be corroded, affecting the structural strength. The performance of the electronic components of the sensor and control unit may also be affected, resulting in the device not being able to work normally or the adjustment accuracy being reduced, which makes the device have certain deficiencies when used. Summary of the invention

[0004] The purpose of the present invention is to provide a micro gear box automatic clearance adjustment device to solve the above-mentioned problems.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic gap adjustment device for a micro gearbox, comprising a first gear and a second gear, the first gear and the second gear are split from the whole gear, a connecting column is connected to the second gear, an adjustment strip is connected between the connecting column and the first gear, the adjustment strip moves in the first gear to adjust the meshing width of the first gear and the second gear, an extension rod, an active ring and a driven ring are connected in the second gear, and the extension rod rotates in the second gear to adjust the gear accuracy.

[0006] Furthermore, a through hole is provided on one side of the first gear, the connecting column is inserted into the through hole provided in the first gear, and the connecting column is fixedly connected to the top of the second gear.

[0007] Furthermore, one end of the adjustment clip is fixedly connected to the connecting column, and the other end of the adjustment clip is inserted into the first gear. The outer wall of the adjustment clip is sleeved with a spring member, and the ends of the spring member are respectively abutted against the first gear and the connecting column.

[0008] Furthermore, one end of the adjustment clip away from the connecting column is connected to a first driving component and a limiting plate, and both the first driving component and the limiting plate are connected to the first gear.

[0009] Furthermore, the first driving component is composed of a driving motor and a connecting rod, the output shaft of the driving motor is fixedly connected to one end of the connecting rod, the other end of the connecting rod is rotatably connected to the top of the adjusting clip, and the top of the driving motor is fixedly connected to the first gear.

[0010] Furthermore, protrusions extend from the top and bottom of the limit plate, and the limit plate is rotatably connected to the first gear through the protrusions. One end of the limit plate is inserted into the adjustment clip, and a spring ring is fixedly connected to the other end of the limit plate, and the end of the elastic ring away from the limit plate is fixedly connected to the inner wall of the first gear.

[0011] Furthermore, the active ring is connected to the middle part of the second gear, the driven ring is sleeved between the active ring and the second gear, and the extension rod is connected to the lower part of the driven ring.

[0012] Furthermore, the outer wall of the active ring is provided with an external thread, the inner wall of the driven ring is provided with a thread groove, the active ring and the driven ring are threadedly connected, and the bottom of the outer wall of the active ring is connected to a second driving component.

[0013] Furthermore, the second driving component is composed of a driving motor and a driving gear, the output shaft of the driving motor is fixedly connected to the driving gear, the driving gear is meshedly connected to the driving ring, and the driving motor is fixedly connected to the second gear.

[0014] Furthermore, one end of the extension rod is rotatably connected to the driven ring, and one end of the extension rod away from the driven ring is connected to the second gear.

[0015] Compared with the prior art, the micro gearbox automatic clearance adjustment device provided by the present invention has the following beneficial effects:

[0016] The automatic clearance adjustment device for a micro gear box can connect the first gear and the second gear by dividing a gear into a first gear and a second gear, and connecting a connecting column, an adjustment clip and a spring member to the second gear. The driving motor in the first driving component can drive the adjustment clip to move through the control of an external device, thereby shortening the distance between the first gear and the second gear, increasing the tooth width, and avoiding abnormal noise caused by abnormal clearance of severely worn gears, thereby preventing vibration from being transmitted to the bearing due to abnormal noise. The device is convenient to adjust and avoids complicated operating steps, making the device more efficient when used.

[0017] Through the extension rod connected to the second gear, when the driving motor in the second driving component drives the active ring to rotate, it can drive the driven ring to move downward, and at the same time drive one end of the extension rod to rotate. The extension rod extends out of the second gear and precisely meshes with other gears to improve the accuracy between gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention from a first viewing angle;

[0020] Figure 2 It is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0021] Figure 3 It is a schematic diagram of the explosion structure of the present invention as a whole;

[0022] Figure 4 It is a schematic diagram of the local structure of the present invention;

[0023] Figure 5 It is a schematic diagram of a partial explosion structure of the present invention;

[0024] Figure 6 It is a schematic diagram of a partial explosion structure of the present invention;

[0025] Figure 7 It is a schematic diagram of a partial explosion structure of the present invention;

[0026] Figure 8 It is a schematic diagram of a local explosion structure of the present invention.

[0027] Description of reference numerals:

[0028] 1. First gear; 2. Second gear; 3. Extension rod; 4. Connecting column; 5. First driving component; 6. Limiting plate; 7. Adjusting clip strip; 8. Spring component; 9. Active ring; 10. Driven ring; 11. Second driving component. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] See also Figure 1-8 A micro gearbox automatic gap adjustment device includes a first gear 1 and a second gear 2. The first gear 1 and the second gear 2 are split parts of the whole gear. The second gear 2 is connected with a connecting column 4. An adjusting clip 7 is connected between the connecting column 4 and the first gear 1. The adjusting clip 7 moves in the first gear 1 to adjust the meshing width of the first gear 1 and the second gear 2. The second gear 2 is connected with an extension rod 3, an active ring 9 and a driven ring 10. The extension rod 3 rotates in the second gear 2 to adjust the gear accuracy.

[0031] A through hole is provided on one side of the first gear 1, and a connecting column 4 is inserted into the through hole provided in the first gear 1. The connecting column 4 is fixedly connected to the top of the second gear 2. Through the through hole provided in the first gear 1 and the connecting column 4 connected to the second gear 2, when the connecting column 4 moves on the first gear 1, it can drive the second gear 2 to rotate and stagger with the rack on the side of the first gear 1. The distance that the connecting column 4 moves on the first gear 1 is equal to the staggered angle between the first gear 1 and the second gear 2.

[0032] One end of the adjusting strip 7 is fixedly connected to the connecting column 4, and the other end of the adjusting strip 7 is inserted into the first gear 1. The outer wall of the adjusting strip 7 is sleeved with a spring member 8, and the ends of the spring member 8 are respectively abutted against the first gear 1 and the connecting column 4. A rack is provided on one side of the adjusting strip 7. By connecting with the racks at different positions, not only the rotation angle of the second gear 2 can be adjusted, but also the adjustment angle can be limited. The spring member 8 connected to the adjusting strip 7 can apply a thrust to the first gear 1 and the second gear 2, so that the first gear 1 and the second gear 2 can always maintain the adjusted distance when in use, thereby limiting the distance between the first gear 1 and the second gear 2. According to the increase in use time, when the elastic coefficient of the spring member 8 changes due to the influence of time and external factors, the spring member 8 is shortened during use, and the thrust effect generated can be ignored.

[0033] The end of the adjustment strip 7 away from the connecting column 4 is connected to the first driving component 5 and the limiting plate 6, and the first driving component 5 and the limiting plate 6 are both connected to the first gear 1. The adjustment strip 7 can be pulled and adjusted by the first driving component 5 connected to the adjustment strip 7, and the connected limiting plate 6 can be connected to the adjustment strip 7 to limit the adjustment strip 7, thereby avoiding displacement of the adjustment strip 7 during use and affecting the use, thereby greatly increasing the practicability of the device.

[0034] The first driving component 5 is composed of a driving motor and a connecting rod. The output shaft of the driving motor is fixedly connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the top of the adjusting strip 7. The top of the driving motor is fixedly connected to the first gear 1. The model of the driving motor in this article is a common model on the market, and no further details will be given here. The switch of the driving motor is controlled by an external device. By connecting the driving motor between the driving motor adjusting strip 7, when the tooth width of the first gear 1 and the second gear 2 needs to be adjusted, the external device controls the driving motor to start, and the output shaft of the driving motor drives the adjusting strip 7 to move through the connecting rod. At this time, the connecting rod rotates counterclockwise with the driving motor as the center, pulling the adjusting strip 7 to reduce the distance between the first gear 1 and the connecting column 4. At the same time, the limit plate 6 swings in the rack on one side of the adjusting strip 7 as the adjusting strip 7 moves. When the adjusting strip 7 stops moving, the limit plate 6 is clamped in the rack to limit the adjusting strip 7.

[0035] The top and bottom of the limit plate 6 are extended with protrusions, and the limit plate 6 is rotatably connected to the first gear 1 through the protrusions. One end of the limit plate 6 is inserted into the adjusting card strip 7, and the other end of the limit plate 6 is fixedly connected with a spring ring. The end of the elastic ring away from the limit plate 6 is fixedly connected to the inner wall of the first gear 1. Through the protrusion connected to the limit plate 6, the limit plate 6 can be connected to the first gear 1, and the spring ring is connected to the limit plate 6, which can provide a supporting force for the limit plate 6. When the adjusting card strip 7 moves, it can drive the limit plate 6 to move in the adjusting card strip 7. At this time, the spring ring is compressed and shortened. When the adjusting card strip 7 does not move, the spring ring drives the limit plate 6 to move to its original position, and the limit plate 6 is clamped in the adjusting card strip 7. Since the limit plate 6 is closely attached to the inner wall of the first gear 1, the limit plate 6 cannot move clockwise, so that the adjusting card strip 7 can only move in but not out, which can limit the adjusting card strip 7.

[0036] The driving ring 9 is connected to the middle part of the second gear 2, the driven ring 10 is sleeved between the driving ring 9 and the second gear 2, the extension rod 3 is connected to the lower part of the driven ring 10, and a plurality of grooves are equidistantly provided at the bottom of the driven ring 10. One end of the extension rod 3 is inserted into the groove and rotates in the groove. A cavity is provided inside the second gear 2, the driving ring 9 is clamped in the middle part of the second gear 2, and the inner wall of the driving ring 9 is flush with the inner wall of the second gear 2.

[0037] The outer wall of the active ring 9 is provided with an external thread, and the inner wall of the driven ring 10 is provided with a threaded groove. The active ring 9 and the driven ring 10 are threadedly connected. The bottom of the outer wall of the active ring 9 is connected with a second driving component 11. Through the connection method of the active ring 9 and the driven ring 10, when the wear between the gears is more serious and the gap is larger, and adjustment is required, the active ring 9 rotates to one side, which can drive the driven ring 10 to move downward, and the driven ring 10 drives one end of the extension rod 3 to move. At this time, the extension rod 3 extends the second gear 2 away from the end of the driven ring 10, increasing the area of ​​the rack and reducing the gap between the gears. When the extension rod 3 needs to be retracted, the active ring 9 rotates to the other side, the active ring 9 drives the driven ring 10 to move upward, and the driven ring 10 drives one end of the extension rod 3 to move. At this time, the extension rod 3 retracts the second gear 2 away from the end of the driven ring 10.

[0038] The second driving component 11 is composed of a driving motor and a driving gear. The output shaft of the driving motor is fixedly connected to the driving gear, and the driving gear is meshed with the driving ring 9. The driving motor is fixedly connected to the second gear 2. The upper part of the outer wall of the driving ring 9 is provided with an external thread, and the lower part of the outer wall of the driving ring 9 is provided with a convex tooth. The driving gear on the driving motor is meshed with the convex teeth at the lower part of the driving ring 9. When in use, the driving motor is controlled to start by an external device, and the driving motor drives the driving ring 9 to rotate through the transmission gear.

[0039] One end of the extension rod 3 is rotatably connected to the driven ring 10, and the end of the extension rod 3 away from the driven ring 10 is connected to the second gear 2. A rectangular groove is provided at the end of the extension rod 3 away from the active ring 9, and a round rod for limiting the extension rod 3 is inserted in the rectangular groove. The end of the round rod is fixedly connected to the second gear 2 to support the extension rod 3. When the extension rod 3 moves, it can cooperate with the rectangular groove to adjust the moving trajectory of the extension rod 3.

[0040] Working principle: when the tooth width of the first gear 1 and the second gear 2 needs to be adjusted, the external device controls the driving motor in the first driving component 5 to start, and the output shaft of the driving motor drives the adjusting strip 7 to move toward the inside of the first gear 1 through the connecting rod. At the same time, the limit plate 6 swings in the rack according to the movement of the adjusting strip 7. When the adjusting strip 7 does not move, the spring ring drives the limit plate 6 to move to the original position, and the limit plate 6 is clamped in the adjusting strip 7 to limit the adjusting strip 7. At this time, the distance between the first gear 1 and the connecting column 4 is reduced, the angle between the first gear 1 and the second gear 2 is staggered, and the tooth width on the outside is increased. Subsequently, the driving motor in the second driving component 11 is controlled and started by the external device, and the driving motor drives the active ring 9 to rotate through the transmission gear. The active ring 9 rotates to one side, driving the driven ring 10 to move downward, and the driven ring 10 drives one end of the extension rod 3 to move. At this time, the extension rod 3 extends out of the second gear 2 away from the end of the driven ring 10, increasing the area of ​​the rack and reducing the gap between the gears.

[0041] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A micro gearbox automatic clearance adjustment device, characterized in that: The invention comprises a first gear (1) and a second gear (2), wherein the first gear (1) and the second gear (2) are split parts of a whole gear, the second gear (2) is connected with a connecting column (4), an adjusting clip (7) is connected between the connecting column (4) and the first gear (1), the adjusting clip (7) moves in the first gear (1) to adjust the meshing width between the first gear (1) and the second gear (2), the second gear (2) is connected with an extension rod (3), an active ring (9) and a driven ring (10), the extension rod (3) rotates in the second gear (2) to adjust the gear accuracy.

2. The automatic clearance adjustment device for a micro gearbox according to claim 1, characterized in that: A through hole is provided on one side of the first gear (1), the connecting column (4) is inserted into the through hole provided in the first gear (1), and the connecting column (4) is fixedly connected to the top of the second gear (2).

3. The automatic clearance adjustment device for a micro gearbox according to claim 1, characterized in that: One end of the adjusting clip (7) is fixedly connected to the connecting column (4), and the other end of the adjusting clip (7) is inserted into the first gear (1). The outer wall of the adjusting clip (7) is sleeved with a spring component (8), and the ends of the spring component (8) are respectively abutted against the first gear (1) and the connecting column (4).

4. The automatic clearance adjustment device for a micro gear box according to claim 1, characterized in that: One end of the adjustment clip (7) away from the connection column (4) is connected to a first driving component (5) and a limiting plate (6); the first driving component (5) and the limiting plate (6) are both connected to the first gear (1).

5. The automatic clearance adjustment device for a micro gear box according to claim 4, characterized in that: The first driving component (5) is composed of a driving motor and a connecting rod, wherein the output shaft of the driving motor is fixedly connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the top of the adjusting clip (7), and the top of the driving motor is fixedly connected to the first gear (1).

6. The automatic clearance adjustment device for a micro gear box according to claim 4, characterized in that: The top and bottom of the limit plate (6) are provided with protrusions, and the limit plate (6) is rotatably connected to the first gear (1) via the protrusions. One end of the limit plate (6) is plugged into the adjustment clip (7), and the other end of the limit plate (6) is fixedly connected to a spring ring, and the end of the elastic ring away from the limit plate (6) is fixedly connected to the inner wall of the first gear (1).

7. The automatic clearance adjustment device for a micro gear box according to claim 1, characterized in that: The active ring (9) is connected to the middle part of the second gear (2), the driven ring (10) is sleeved between the active ring (9) and the second gear (2), and the extension rod (3) is connected to the lower part of the driven ring (10).

8. The automatic clearance adjustment device for a micro gear box according to claim 1, characterized in that: The outer wall of the active ring (9) is provided with an external thread, the inner wall of the driven ring (10) is provided with a thread groove, the active ring (9) and the driven ring (10) are threadedly connected, and the bottom of the outer wall of the active ring (9) is connected to a second driving component (11).

9. The automatic clearance adjustment device for a micro gear box according to claim 8, characterized in that: The second driving component (11) is composed of a driving motor and a driving gear, the output shaft of the driving motor is fixedly connected to the driving gear, the driving gear is meshedly connected to the driving ring (9), and the driving motor is fixedly connected to the second gear (2).

10. The automatic clearance adjustment device for a micro gear box according to claim 1, characterized in that: One end of the extension rod (3) is rotatably connected to the driven ring (10), and one end of the extension rod (3) away from the driven ring (10) is connected to the second gear (2).

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