A precision-adjustable speed reducer

Abstract

The application provides a precision-adjustable speed reducer, and belongs to the technical field of machinery.It solves the problem that the existing speed reducer cannot be adjusted after wearing.The precision-adjustable speed reducer comprises a speed reducer shell, a worm and a worm wheel which are meshed and connected in transmission inside the speed reducer shell, the worm wheel has a positioning shaft part, a precision adjustment plate made into a round plate is arranged on the positioning shaft part through a bearing, the precision adjustment plate has a connecting hole, the connecting hole is coaxially arranged with the positioning shaft part and the worm wheel, and the center line of the connecting hole is eccentrically arranged relative to the axis line of the precision adjustment plate, a plurality of adjustment holes are arranged on the precision adjustment plate, an end cover is arranged on the precision adjustment plate, the end cover has a through-type arc-shaped adjustment groove, the arc-shaped adjustment groove is coaxially arranged with the precision adjustment plate, and the end cover is fixedly connected with the speed reducer shell.It can adjust the axis position of the worm wheel by adjusting the angular position of the precision adjustment plate, so that the meshing precision of the speed reducer is adjusted.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology and relates to a speed reducer, particularly a speed reducer with adjustable anti-loosening precision. Background Technology

[0002] After prolonged use, the meshing teeth of the worm gear and worm inevitably wear down, affecting the meshing degree of the worm gear and worm, and consequently the transmission accuracy. Existing solutions often involve replacing the worm gear or worm, which results in high maintenance and operating costs. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a precision-adjustable speed reducer.

[0004] The objective of this invention can be achieved through the following technical solution: A precision adjustable reducer includes a reducer housing, wherein a worm gear and a worm wheel are meshed and connected inside the reducer housing. The worm wheel has an outwardly protruding positioning shaft on its end face. A precision adjustment plate, shaped like a circular plate, is sleeved on the positioning shaft via a bearing. The precision adjustment plate has a connecting hole, which is coaxially arranged with the positioning shaft and the worm wheel, and the center line of the connecting hole is eccentrically arranged relative to the axis of the precision adjustment plate. The precision adjustment plate has a plurality of adjustment holes arranged in a circular array around the center line of the connecting hole. An end cap is sleeved on the precision adjustment plate, and the end cap has a through-type arc-shaped adjustment groove. The arc-shaped adjustment groove and the precision adjustment plate are coaxially arranged. The end cap is fixedly connected to the reducer housing, and the end cap and the precision adjustment plate are fixedly connected by fastening bolts. The fastening bolts penetrate the arc-shaped adjustment groove and are fixedly connected within the adjustment holes.

[0005] In the aforementioned precision adjustable reducer, each of the adjustment holes has a non-mirror symmetrical structure with respect to the line connecting the center of the connecting hole and the center of the precision adjustment plate.

[0006] In the aforementioned precision-adjustable reducer, the number of adjustment holes is 10 to 20.

[0007] In the aforementioned precision adjustable reducer, the distance between the center of the annular array of adjustment holes and the center of the precision adjustment plate is 0.05 to 0.15 mm.

[0008] In the aforementioned precision adjustable reducer, the end cover has two arc-shaped adjustment grooves, with the center line of the end cover as the center line of the arc, and the two arc-shaped adjustment grooves are symmetrically arranged with respect to the center of the end cover.

[0009] In the aforementioned precision adjustable reducer, the precision adjustment plate has an outwardly protruding secondary stepped shaft protrusion on its outer end face facing away from the worm gear. The first stepped shaft protrusion of the secondary stepped shaft protrusion is coaxially arranged with the precision adjustment plate, and the second stepped shaft protrusion of the secondary stepped shaft protrusion is coaxially arranged with the connecting hole. The end cover has a secondary stepped positioning hole adapted to the aforementioned secondary stepped shaft protrusion. The diameter of the first positioning hole, which connects to the first stepped shaft protrusion of the secondary stepped shaft protrusion, is the same as the outer diameter of the first stepped shaft protrusion. The diameter of the second positioning hole, which connects to the second stepped shaft protrusion, is larger than the outer diameter of the second stepped shaft protrusion. The end cover is screwed and fixed to the reducer housing via a threaded structure.

[0010] In the aforementioned precision adjustable reducer, the arc-shaped adjustment groove is a two-stage stepped groove. The bolt cap of the fastening bolt is located in the second stepped groove and abuts against the first stepped surface. The bolt post of the fastening bolt is inserted into the first stepped groove, and the size of the bolt post is smaller than the groove width of the first stepped groove.

[0011] In the aforementioned precision-adjustable reducer, the width of the first stepped groove is greater than the diameter of the adjustment hole.

[0012] In the aforementioned precision adjustable reducer, each of the two end faces of the worm gear has an outwardly protruding positioning shaft portion. Each of the two positioning shaft portions is fitted with a precision adjustment plate through a bearing. Each of the two precision adjustment plates is connected to both ends of the reducer housing through an end cap.

[0013] In the aforementioned precision adjustable reducer, the two precision adjustment plates are arranged in a mirror-symmetric manner with respect to the worm gear, while the two end covers are arranged in a non-mirror-symmetric manner with respect to the worm gear.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This reducer allows adjustment of the worm gear's axis position by adjusting the angle of the precision adjustment plate. Because the annular array center of each adjustment hole on the precision adjustment plate is eccentric to the center of the precision adjustment plate itself (i.e., the center line of the connecting hole is misaligned with the center line of the precision adjustment plate), the worm gear's axis can be adjusted 360° around the center line of the precision adjustment plate with the distance between them. This ensures that the worm gear transmission assembly can maintain full meshing even after wear, thus guaranteeing meshing accuracy and extending the reducer's service life.

[0016] 2. This reducer has an adjustment structure consisting of a precision adjustment plate and an end cover at each end of the worm gear, which improves structural stability, reduces wear on the worm gear transmission components, and extends their service life.

[0017] 3. The arc-shaped adjustment grooves on the two end covers of this reducer have a non-mirror symmetrical structure, allowing for a wider adjustment range. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a three-dimensional view of the internal structure of the present invention.

[0020] Figure 3 This is an exploded view of the internal structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the precision adjustment plate structure in this invention.

[0022] In the diagram, 1 is the reducer housing; 2 is the worm gear; 3 is the worm wheel; 301 is the positioning shaft; 4 is the bearing; 5 is the precision adjustment plate; 501 is the connecting hole; 502 is the adjustment hole; 503 is the secondary stepped shaft protrusion; 6 is the end cover; 601 is the arc-shaped adjustment groove; 6011 is the first step groove; 6012 is the first step surface; 6013 is the second step groove; and 602 is the secondary stepped positioning hole. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0024] Reference Figures 1-4 This embodiment is a precision adjustable reducer, including a reducer housing 1. The reducer housing 1 has a worm gear 2 and a worm wheel 3 that are meshed and connected. Each of the two end faces of the worm wheel 3 has an outwardly protruding positioning shaft portion 301. Each of the two positioning shaft portions 301 is fitted with a precision adjustment plate 5 through a bearing 4. Each of the two precision adjustment plates 5 is connected to both ends of the reducer housing 1 through an end cover 6. Both the end cover 6 and the precision adjustment plate 5 are made into a circular plate shape and are coaxially arranged. The end cover 6 is used to limit the precision adjustment plate 5 and the worm wheel 3.

[0025] Specifically, the precision adjustment plate 5 is circular, with an eccentrically positioned connecting hole 501 in its center. The connecting hole 501 is coaxial with the positioning shaft 301 and the worm gear 3, meaning the centerline of the connecting hole 501 is eccentrically positioned relative to the axis of the precision adjustment plate 5. The outer end face of the precision adjustment plate 5 facing away from the worm gear 3 has an outwardly protruding secondary stepped shaft protrusion 503. The secondary stepped shaft protrusion 503 is coaxial with the precision adjustment plate 5, and the connecting hole 501 is located on the secondary stepped shaft protrusion 503, with the connecting hole 510 eccentrically positioned relative to the secondary stepped shaft protrusion 503. The bearing 4 is positioned between the secondary stepped shaft protrusion 503 and the positioning shaft 301. The end cover 6 has a secondary stepped positioning hole 602 that matches the secondary stepped shaft protrusion 503. The secondary stepped positioning hole 602 is coaxial with the secondary stepped shaft protrusion 503, and the end cover 6 is screwed and fixed to the reducer housing 1 via a threaded structure for easy installation and fixation.

[0026] The precision adjustment plate 5 is provided with a plurality of adjustment holes 502 arranged in a circular array with the center line of the connection hole 501 as the center. The end cover 6 is sleeved on the outer peripheral wall of the precision adjustment plate 5, and the end face of the end cover 6 has a through arc-shaped adjustment groove 601. The arc-shaped adjustment groove 601 and the precision adjustment plate 5 are coaxially arranged. The end cover 6 is fixedly connected to the reducer housing 1, and the end cover 6 and the precision adjustment plate 5 are fixedly connected by fastening bolts. The fastening bolts penetrate the arc-shaped adjustment groove 601 and are fixedly connected in the adjustment hole 502. The arc length of the arc-shaped adjustment groove 601 is greater than the length of two adjacent adjustment holes 502, preferably the length of three sequentially adjacent adjustment holes 502.

[0027] The arc-shaped adjustment groove 601 is a two-stage stepped groove. The bolt head of the fastening bolt is located in the second stepped groove 6013 and abuts against the first stepped surface 6012. The bolt post of the fastening bolt is inserted into the first stepped groove 6011. The size of the bolt post is smaller than the groove width of the first stepped groove 6011. That is, the groove width of the first stepped groove 6011 is larger than the diameter of the adjustment hole 502. Since the center line of the annular array of adjustment holes 502 is eccentrically set with respect to the center line of the precision adjustment plate 5, when the precision adjustment plate 5 rotates, the position of the center line of the adjustment hole 502 relative to the width direction of the first stepped groove 6011 will change slightly. The groove width of the first stepped groove 6011 is larger than the diameter of the adjustment hole 502, which can ensure that the fastening bolt can lock the end cover 6 and the precision adjustment plate 5, and also ensure that the fastening bolt has sufficient adjustment space when the position of the adjustment hole 502 changes.

[0028] Furthermore, each adjustment hole 502 has a non-mirror symmetrical structure with the line connecting the center of the connecting hole 501 and the center of the precision adjustment plate 5 as the axis. When the rotation angle of each adjustment hole 502 is different, the distance between the center of the connecting hole 501 and the center of the precision adjustment plate 5 is also different, which can make the adjustment positioning position more diverse and the adjustment adaptability better.

[0029] Furthermore, the number of adjustment holes 502 is 10 to 20, and more preferably, the number of adjustment holes is 12.

[0030] Furthermore, the distance between the center of the annular array of each adjustment hole 502 and the center of the precision adjustment plate 5 is 0.05 to 0.15 mm, more preferably 0.1 mm, which can achieve an adjustment range of twice the above-mentioned distance for the worm gear 3 and worm 2, and can ensure the accuracy and smooth operation of the reducer while ensuring the meshing fit of the worm gear 3 and worm 2.

[0031] Furthermore, the end cap 6 has two arc-shaped adjustment grooves 601, with the center line of the end cap 6 as the center line of the arc, and the two arc-shaped adjustment grooves 601 are symmetrically arranged with respect to the center of the end cap 6. The connection between the end cap 6 and the precision adjustment plate 5 is more secure, and it also has a larger adjustment range.

[0032] Furthermore, the two precision adjustment plates 5 are arranged in a mirror symmetry with respect to the worm gear 3, while the two end caps 6 are arranged in a non-mirror symmetry with respect to the worm gear 3. By fixing the two end caps 6 at different positions, the adjustment range can be further improved.

[0033] The working principle of this embodiment is as follows: When the transmission structure between the worm 2 and the worm wheel 3 of the reducer wears, the fastening bolts used to fix the end cover 6 and the precision adjustment plate 5 are unscrewed, so that the precision adjustment plate 5 can be rotated. This causes the worm wheel 3 connected in the connecting hole 501 of the precision adjustment plate 5 to be positioned with the positioning shaft 301, so that the axis of the worm wheel 3 rotates around the center line of the precision adjustment plate 5. As the distance between the worm wheel 3 and the center line of the precision adjustment plate 5 changes, the meshing degree between the worm wheel 3 and the worm 2 can be adjusted to ensure the stability of the transmission mechanism. After the adjustment is completed, the fastening bolts are tightened again to lock the housing.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A precision adjustable speed reducer, comprising a speed reducer housing (1), wherein the speed reducer housing (1) houses a worm gear (2) and a worm wheel (3) that are meshed and transmitted together, characterized in that, The end face of the worm gear (3) has an outwardly protruding positioning shaft (301). A precision adjustment plate (5) in the shape of a circular plate is sleeved on the positioning shaft (301) through a bearing (4). The precision adjustment plate (5) has a connecting hole (501). The connecting hole (501) is coaxially arranged with the positioning shaft (301) and the worm gear (3), and the center line of the connecting hole (501) is eccentrically arranged relative to the axis of the precision adjustment plate (5). The precision adjustment plate (5) is provided with a plurality of adjustment holes (502) arranged in a circular array with the center line of the connecting hole (501) as the center. An end cover (6) is sleeved on the precision adjustment plate (5). The end cover (6) has a through arc-shaped adjustment groove (601). The arc-shaped adjustment groove (601) and the precision adjustment plate (5) are coaxially arranged. The end cover (6) is fixedly connected to the reducer housing (1), and the end cover (6) and the precision adjustment plate (5) are... The plates (5) are fixed together by fastening bolts. The fastening bolts penetrate the arc-shaped adjustment groove (601) and are fixed in the adjustment hole (502). The outer end face of the precision adjustment plate (5) facing away from the worm gear (3) has an outwardly protruding secondary stepped shaft protrusion (503). The secondary stepped shaft protrusion (503) is coaxially arranged with the precision adjustment plate (5). The end cover (6) has a secondary stepped positioning hole (602) that is adapted to the above-mentioned secondary stepped shaft protrusion (503). The end cover (6) is screwed and fixed to the reducer housing (1) by a threaded structure. The arc-shaped adjustment groove (601) is made into a secondary stepped groove. The bolt cap of the fastening bolt is located in the second stepped groove (6013) and abuts against the first stepped surface (6012). The bolt post of the fastening bolt is inserted in the first stepped groove (6011). The size of the bolt post is smaller than the groove width of the first stepped groove (6011).

2. The precision-adjustable reducer according to claim 1, characterized in that, Each of the adjustment holes (502) has a non-mirror symmetrical structure with the center of the connecting hole (501) and the center of the precision adjustment plate (5) as the line connecting the center of the connecting hole (501) and the center of the precision adjustment plate (5).

3. The precision-adjustable reducer according to claim 2, characterized in that, The number of adjustment holes (502) is 10 to 20.

4. The precision-adjustable reducer according to claim 1, characterized in that, The distance between the center of the annular array of each adjustment hole (502) and the center of the precision adjustment plate (5) is 0.05 to 0.15 mm.

5. The precision-adjustable reducer according to claim 1, 2, 3, or 4, characterized in that, The width of the first stepped groove (6011) is greater than the diameter of the adjustment hole (502).

6. The precision-adjustable reducer according to claim 5, characterized in that, The end cap (6) has two arc-shaped adjustment grooves (601), with the center line of the end cap (6) as the center line of the arc, and the two arc-shaped adjustment grooves (601) are symmetrically arranged with respect to the center of the end cap (6).

7. The precision-adjustable reducer according to claim 1, 2, 3, or 4, characterized in that, The worm gear (3) has an outwardly protruding positioning shaft (301) on each of its two end faces. Each of the two positioning shafts (301) is fitted with a precision adjustment plate (5) through a bearing (4). Each of the two precision adjustment plates (5) is connected to both ends of the reducer housing (1) through an end cap (6).

8. The precision-adjustable reducer according to claim 7, characterized in that, The two precision adjustment plates (5) are arranged in a mirror symmetry with the worm gear (3) as the center, and the two end caps (6) are arranged in a non-mirror symmetry with the worm gear (3) as the center.

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