CN115750687A - Gear reducer and honing oilstone radial expansion and contraction mechanism - Google Patents
Gear reducer and honing oilstone radial expansion and contraction mechanism Download PDFInfo
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- CN115750687A CN115750687A CN202211395564.0A CN202211395564A CN115750687A CN 115750687 A CN115750687 A CN 115750687A CN 202211395564 A CN202211395564 A CN 202211395564A CN 115750687 A CN115750687 A CN 115750687A
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Abstract
The invention discloses a gear reducer and a honing oilstone radial expansion and contraction mechanism, which comprise a gear shaft assembly, a gear sleeve assembly and an eccentric wheel; the gear shaft assembly comprises a gear shaft and a gear, the gear is fixedly connected to the right end of the gear shaft, and the gear shaft is arranged in the honing head base body and connected with the honing head; the gear sleeve assembly comprises an inner gear sleeve and an end cover, the inner gear sleeve is meshed with the gear, the difference between the number of teeth of the inner gear sleeve and the number of teeth of the gear is not more than 4, and the end cover is tightly attached to the right end face of the inner gear sleeve; the eccentric wheel comprises a positioning cylindrical surface, a third fixing hole and a fourth fixing hole, the left end of the eccentric wheel is sleeved in the end cover through the positioning cylindrical surface, the eccentric wheel is sleeved on the gear shaft through the third fixing hole, the right end of the eccentric wheel is connected with the transmission rod through the fourth fixing hole, and an eccentric distance e is reserved between the center line of the positioning cylindrical surface and the center lines of the third fixing hole and the fourth fixing hole.
Description
Technical Field
The invention relates to the technical field of grinding and honing, in particular to a gear reducer and a honing oilstone radial expansion and contraction mechanism.
Background
In the prior art, a honing head for honing holes of metal parts is complex in structure, particularly a honing oilstone radial expansion and contraction mechanism is complex, a cone structure is adopted, the structures are different, the universality is poor, and the manufacturing cost of a honing tool is high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a gear reducer and a honing oilstone radial expansion and contraction mechanism aiming at the defects of the prior art, wherein the gear reducer and the honing oilstone radial expansion and contraction mechanism can realize the speed reduction of a honing oilstone radial expansion and contraction driving mechanism, can realize the radial expansion and contraction and constant pressure of an oilstone honing strip, and ensure that the honing oilstone radial expansion and contraction is more stable and the impact is smaller.
In order to achieve the purpose, the invention adopts the technical scheme that:
a gear reducer is structurally characterized by comprising a gear shaft assembly, a gear sleeve assembly and an eccentric wheel;
the gear shaft assembly comprises a gear shaft and a gear, the gear is fixedly connected to the right end of the gear shaft, and the gear shaft is arranged in the honing head base body and connected with the honing head;
the gear sleeve assembly comprises an inner gear sleeve and an end cover, the inner gear sleeve is meshed with the gear, the difference between the number of teeth of the inner gear sleeve and the number of teeth of the gear is not more than 4, and the end cover is tightly attached to the right end face of the inner gear sleeve;
the eccentric wheel comprises a positioning cylindrical surface, a third fixing hole and a fourth fixing hole, the left end of the eccentric wheel is sleeved in the end cover through the positioning cylindrical surface, the eccentric wheel is sleeved on the gear shaft through the third fixing hole, the right end of the eccentric wheel is connected with the transmission rod through the fourth fixing hole, and an eccentric distance e is reserved between the center line of the positioning cylindrical surface and the center lines of the third fixing hole and the fourth fixing hole.
The gear reducer is provided with an eccentric wheel and a small-tooth-difference planetary gear transmission structure, wherein the small-tooth-difference planetary gear transmission structure takes an external gear, namely a gear of a gear shaft assembly, as a central gear and takes an internal gear, namely a gear sleeve assembly, as a planetary gear, and the gear sleeve assembly directly transmits rotary motion to the gear shaft assembly through the gear to output. Therefore, when the eccentric wheel is rotated, the gear sleeve assembly is forced to do circular translation motion around the axis direction of the gear shaft assembly and also to do rotary motion around the axis of the gear shaft assembly, and after the gear with small tooth difference is meshed and transmitted, the gear shaft assembly obtains the rotary motion with reverse deceleration. The gear reducer is arranged in the honing head and connected with the hydraulic adjusting mechanism of the honing machine tool, so that the reverse speed reduction of the honing oilstone expansion and contraction driving mechanism is realized, the honing oilstone expands and contracts stably in the radial direction and keeps constant pressure, and the honing oilstone expands and contracts stably in the radial direction and has smaller impact.
According to the embodiment of the invention, the invention can be further optimized, and the following is the technical scheme formed after optimization:
the positioning gear is a T-shaped sleeve structure with straight-face teeth at one end, the first fixing hole is formed in the side wall of the cylindrical end of the positioning gear, and the positioning gear is sleeved on a gear shaft of the gear shaft assembly through a second fixing hole in the center of the sleeve structure of the positioning gear.
Furthermore, the gear sleeve assembly further comprises an outer gear sleeve, the outer gear sleeve is of a circular ring structure, the inner gear sleeve and the end cover are respectively nested in the middle and the right end of the outer gear sleeve, the left end of the outer gear sleeve is meshed with the straight-face gear end of the positioning gear, and the difference between the number of the teeth of the outer gear sleeve and the number of the teeth of the positioning gear is not more than 4.
Furthermore, the inner ring surface of the outer gear sleeve is preset with an outer gear sleeve inner tooth, a first step surface and a second step surface; two symmetrical positioning teeth are preset on the outer circular surface of the inner gear sleeve, and the inner circular surface is the inner teeth of the inner gear sleeve; the end cover is a circular sheet with a central hole, and the left end of the end cover is provided with an end cover end face step hole;
the outer circular surface of the inner gear sleeve is in transition fit with the first step surface of the outer gear sleeve; the end cover is in interference fit with the second step surface.
Furthermore, the gear shaft assembly also comprises a positioning sleeve, and the positioning sleeve is of a circular ring structure; the right end of the gear shaft is provided with a third step surface and a fourth step surface, a part of tooth form of the third step surface is cut off, the fourth step surface is a cylindrical surface, and the end part of the cylindrical surface is provided with a threaded hole; and the positioning sleeve and the gear are sequentially sleeved on the third step surface of the gear shaft in an interference fit manner from left to right.
Further, the gear is equipped with gear external tooth, gear internal tooth, the gear external tooth is convex circular arc face tooth structure, the gear internal tooth is straight face tooth structure, just the left end of gear is equipped with the gear conical surface.
Furthermore, the gear shaft sleeve further comprises a bushing, the bushing is sleeved on the gear shaft through a bushing stepped hole at the left end of the bushing, and a counter bore is further formed in the right end of the bushing.
Furthermore, a gasket is arranged between the bushing and the gear shaft.
Based on the same inventive concept, the invention also provides a honing oilstone radial expansion and contraction mechanism.
A honing oilstone radial expansion and contraction mechanism is structurally characterized by comprising the gear reducer according to any one of claims 1-8, and further comprising a honing head and a transmission rod, wherein a rack of the honing head is meshed with a gear shaft of the gear reducer, the transmission rod is of a universal connection structure, one end of the transmission rod is connected with a fourth fixing hole in an eccentric wheel of the gear reducer, and the other end of the transmission rod is connected with a honing rod of a machine tool.
Further, the driving rod comprises a driving rod fixing hole and an expansion and contraction mechanism joint, a thread fixing hole is formed in the honing head base body, the expansion and contraction mechanism joint is inserted into a fourth fixing hole of the eccentric wheel, and the driving rod fixing hole and the thread fixing hole are formed in a penetrating mode through a step screw.
Compared with the prior art, the invention has the beneficial effects that:
1) The gear reducer can be widely applied to honing processing of metal part holes and manufacturing of honing tools, is suitable for honing heads with diameters of more than 100mm and various specifications, has strong universality, and greatly reduces the manufacturing cost of the honing tools. The method has the characteristics of easy operation and high efficiency, and can be mastered only by carrying out simple operation training on operators.
2) The honing oilstone radial expansion and contraction mechanism ensures good contact and constant pressure between the honing oilstone and the wall of the part hole by using the planetary gear reducer with small tooth difference, realizes reverse speed reduction of the honing oilstone expansion and contraction mechanism, and ensures that the honing oilstone radial expansion and contraction process is more stable and the impact is less.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting to the present invention.
Fig. 1 is a two-dimensional structural view of an embodiment of a gear reducer of the present invention.
FIG. 2 is an exploded view of one embodiment of the gear reducer of the present invention.
Fig. 3 is a cross-sectional view of one embodiment of the pinion assembly of the present invention.
FIG. 4 is a cross-sectional view of one embodiment of a pinion of the pinion assembly of the present invention.
Fig. 5 is a schematic structural diagram of an embodiment of a gear of the gear shaft assembly of the present invention.
Fig. 6 is a schematic structural view of an embodiment of the gear sleeve assembly of the present invention.
Fig. 7 is a cross-sectional view of one embodiment of the gear sleeve assembly of the present invention.
Fig. 8 is a schematic structural view of an embodiment of an outer sleeve of the present invention.
Fig. 9 is a schematic structural view of an embodiment of an internal gear sleeve of the gear sleeve assembly of the present invention.
Fig. 10 is a schematic structural view of an embodiment of an end cap of the gear sleeve assembly of the present invention.
Fig. 11 is a schematic structural diagram of an embodiment of a positioning gear of the present invention.
FIG. 12 is a schematic structural diagram of an eccentric wheel according to an embodiment of the present invention.
FIG. 13 is a schematic structural view of an embodiment of the eccentric of the present invention.
FIG. 14 is a schematic view of an embodiment of a bushing of the present invention.
Fig. 15 is a schematic view of a connecting structure of an embodiment of the honing oilstone radial expansion and contraction mechanism of the invention.
Fig. 16 is an overall structural schematic diagram of an embodiment of the honing oilstone radial expansion and contraction mechanism of the invention.
Reference numerals:
1-a gear shaft assembly; 2-a gear sleeve assembly; 3-positioning the gear; 4-eccentric wheel; 5-a gasket; 6-a lining; 7-countersunk head screw; 8-honing head; 9-a transmission rod; 10-step screws; 000-planet motion gap;
11-a gear shaft; 12-a positioning sleeve; 13-a gear; 14-a resilient cylindrical pin;
21-outer gear sleeve; 22-inner gear sleeve; 23-end caps;
111-a third step face; 112-a fourth step surface; 113-a threaded hole;
131-external gear teeth; 132-internal gear teeth; 133-gear taper;
211-external teeth sleeve internal teeth; 212-a first step surface; 213-a second step surface;
221-positioning teeth; 222-inner teeth of inner gear sleeve;
231-end cover end face step holes;
301-a first fixation hole; 302-a second fixation hole; 303-positioning an inner taper hole of the gear;
401-positioning cylindrical surface; 402-a third fixation hole; 403-eccentric wheel step surface; 404-a fourth fixing hole; 405-eccentric drive groove;
601-a bushing stepped bore; 602-counter sink;
801-threaded fixing holes; 802-fifth fixation hole; 803-sixth fixing hole; 804-a rack;
901-drive rod fixing hole; 902-expansion and contraction mechanism joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without inventive step, are within the scope of protection of the invention. It should be noted that the terms "first," "second," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
At least one embodiment of the invention provides a gear reducer, as shown in fig. 1 and 2, comprising a gear shaft assembly 1, a gear sleeve assembly 2, a positioning gear 3, an eccentric wheel 4, a gasket 5, a bushing 6 and a countersunk screw 7. The positioning gear 3, the gear sleeve component 2, the eccentric wheel 4, the gasket 5 and the bush 6 are sequentially installed at the right end of the gear shaft 11 of the gear shaft component 1 from left to right, and the positioning gear 3 and the gear 13 of the gear shaft component 1 are all meshed in the gear sleeve component 2.
With reference to fig. 3, 4 and 5, the gear shaft assembly 1 includes a gear shaft 11, a locating sleeve 12 and a gear 13, the gear shaft 11 is of a small-diameter long gear shaft structure, preferably, involute teeth with a cross section having a module m =1, a pressure angle =20 and a tooth number =10, one end of the gear shaft 11 is provided with a third step surface 111 and a fourth step surface 112, wherein a part of the tooth shape is cut off from the third step surface 111, the fourth step surface 112 is a cylindrical surface, and a threaded hole 113 is formed at an end of the cylindrical surface. The positioning sleeve 12 is an oblong ring structure, the gear 13 is provided with gear external teeth 131, gear internal teeth 132, the gear external teeth are preferably in a convex arc tooth structure, the gear internal teeth are preferably in a straight tooth structure, so that the gear 13 can be prevented from being meshed and clamped, and a gear conical surface 133 is arranged at one end of the gear 13 to increase the strength of the gear. The positioning sleeve 12 and the gear 13 are sequentially sleeved on the third step surface 111 of the gear shaft 11 in an interference fit manner, and the third step surface 111 with a partial tooth profile further limits the mutual rotation of the gear 13 and the gear shaft 11.
Referring to fig. 6 and 7, the gear sleeve assembly 2 includes an outer gear sleeve 21, an inner gear sleeve 22 and an end cover 23.
Referring to fig. 8, the outer gear sleeve 21 is a circular ring structure, and the inner ring surface of the outer gear sleeve is preset with outer gear sleeve inner teeth 211, a first step surface 212 and a second step surface 213, wherein the first step surface 212 is a cut-off tooth shape, and the second step surface 213 is a cylindrical hole. The external toothing system internal toothing 211 is preferably a circular-arc internal toothing.
Referring to fig. 9, two symmetrical positioning teeth 221 are preset on the outer circular surface of the internal gear sleeve 22, the inner circular surface of the internal gear sleeve 22 is an internal gear sleeve internal tooth 222, and the internal gear sleeve internal tooth 222 is preferably a straight internal tooth.
Referring to fig. 10, the end cap 23 is a circular plate with holes, and has a stepped hole 231 on the end face of the end cap at one end.
The inner gear sleeve 22 is mounted on the first step surface 212 of the outer gear sleeve 21, so that the positioning teeth 221 are inserted into any two symmetrical tooth grooves on the first step surface 212 of the outer gear sleeve 21 to limit the relative circumferential rotation of the two, and the outer circular surface of the inner gear sleeve 22 is in transition fit with the first step surface 212 of the outer gear sleeve 21. The end face of the inner gear sleeve 22 is tightly attached to the end face of the first step face 212, one face, provided with the step hole 231, of the end cover 23 is tightly attached to the inner gear sleeve 22 and is installed at the second step face 213 of the outer gear sleeve 21, and the end cover 23 is in interference fit with the second step face 213 of the outer gear sleeve 21. Therefore, the outer gear sleeve 21, the inner gear sleeve 22 and the end cover 23 are sleeved together to form the gear sleeve assembly 2.
Referring to fig. 11, the positioning gear 3 is a T-shaped sleeve structure with a straight tooth at one end, and is mounted close to the gear 13, and the positioning gear 3 is sleeved on the tooth top circle of the gear shaft 11 of the gear shaft assembly 1 through the second fixing hole 302 thereof, and a rotation gap is left. The positioning gear 3 is provided with a positioning gear inner tapered hole 303 at one toothed end thereof for avoiding the gear tapered surface 133 of the gear 13. The positioning gear 3 is provided with two symmetrical first fixing holes 301 on the side wall of the cylindrical end thereof for connecting and fixing with the honing head 8.
With reference to fig. 12 and 13, the eccentric wheel 4 is mounted in the end cover end surface step hole 231 of the end cover 23 through a positioning cylindrical surface 401, and is sleeved on the fourth step surface 112 of the gear shaft 11 through a third fixing hole 402, and both are in clearance fit and can freely rotate with each other. Because the center line of the positioning cylindrical surface 401 of the eccentric wheel 4 is preset with the center lines of the third fixing hole 402 and the fourth fixing hole 404 by an eccentric distance e (see fig. 12), when the eccentric wheel 4 is rotated, the gear sleeve component 2 is forced to do circular translation motion around the axis of the gear shaft component 1 and also to do rotation motion around the axis of the gear shaft component, and after the gear with small gear difference is meshed and transmitted, the gear shaft component 1 obtains reverse deceleration rotation motion. The eccentric wheel step surface 403 of the eccentric wheel 4 plays a role in reducing friction, and the positioning gear 3 only plays a role in positioning and supporting and does not play a role in transmission. The eccentric distance e is equal to the center distance when the gear 13 of the gear shaft assembly 1 and the inner gear sleeve 22 of the gear sleeve assembly 2 are engaged.
Referring to fig. 14, the bushing 6 is sleeved on the second step surface 112 of the pinion 11 through the bushing step hole 601 and the washer 5, and is located in the fourth fixing hole 404 of the eccentric wheel 4, the bushing 6 is connected with the threaded hole 113 of the pinion 11 by the countersunk head screw 7 tightly contacting the countersunk head hole 602 thereof, so that the gear reducer is integrally connected together. The axial movement gap is ensured by thinning the thickness of the shim 5.
The working principle of the gear reducer of the invention is as follows: through setting up eccentric wheel 4 and the poor planet wheel transmission structure of few tooth, wherein, the poor planet wheel transmission structure of few tooth is gear 13 as the centre wheel, and the internal gear is gear cover subassembly 2 as the planet wheel, and gear cover subassembly 2 directly transmits rotary motion for gear shaft subassembly 1 output through gear 13. Therefore, when the eccentric wheel 4 is rotated, the gear sleeve component 2 is forced to do circular translation motion around the axis direction of the gear shaft component 1 and also do rotary motion around the axis of the gear shaft component, and after the gear shaft component 1 is subjected to meshing transmission by a small gear difference, the gear shaft component 1 obtains the rotary motion with reverse speed reduction.
Based on the same inventive concept, the invention also provides a honing oilstone radial expansion and contraction mechanism, as shown in fig. 15 and 16.
The honing head 8 is a rack expansion and contraction oilstone honing head matched with the gear honing head, and a rack 804 of the honing head 8 is meshed with a gear shaft 11 of the gear reducer. The transmission rod 9 adopts a universal connection structure, one end of the transmission rod 9 is connected with the honing head 8 and the gear reducer, and the other end is connected with the honing rod of the machine tool.
The left end of the gear shaft of the gear reducer is inserted into the sixth fixing hole 803 of the base body of the honing head 8, and is inserted into the first fixing hole 301 preset on the positioning gear 3 and the fifth fixing hole 802 of the base body of the honing head 8 through the elastic cylindrical pin 14, so that the gear reducer is connected with the honing head 8.
The step screw 10 is inserted into the driving rod fixing hole 901 and the thread fixing hole 801 of the honing head 8 base body, and the expansion mechanism joint 902 inserted into the driving rod 9 is inserted into the fourth fixing hole 404 of the eccentric wheel 4 and the eccentric wheel driving groove 405, thereby completing the connection of the driving rod 9 with the honing head 8 and the gear reducer.
The working principle of the honing oilstone radial expansion and contraction mechanism is as follows: the rotation and axial reciprocating motion of the honing head 8 are realized by the transmission of the honing machine tool through the honing rod and the transmission rod 9, the radial expansion and contraction of the honing oilstone are transmitted to the expansion and contraction adjusting structure in the transmission rod 9 through the driving rod in the honing rod, and then transmitted to the oilstone rack 804 of the honing head 8 through the expansion and contraction structure joint 902, so that the radial linear expansion and contraction of the honing oilstone are realized.
The installation process of the invention is as follows:
referring to fig. 15, the gear reducer of the present invention is used by being first installed in the sixth fixing hole 803 of the base body of the honing head 8 and fixed to the base body of the honing head 8 by the elastic cylindrical pin 14 through the first fixing hole 301 of the positioning gear 3 and the fifth fixing hole 802 of the honing head 8. The driving rod 9 is connected to the honing head 8 base body through the driving rod fixing hole 901, the thread fixing hole 801 of the honing head 8 and the step screw 10, the expansion mechanism joint 902 penetrating the hollow rod of the driving rod 9 is inserted into the fourth fixing hole 404 of the eccentric wheel 4 and the eccentric wheel driving groove 405, and the other end of the driving rod 9 is connected with the honing rod of the machine tool.
The working process of the invention is as follows:
referring to fig. 15 and 16, when the honing stone of the present invention is radially expanded and contracted, the honing head 8 is located in the hole to be honed, the automatic machine tool expansion and contraction system drives the expansion and contraction mechanism joint 902 in the hollow rod of the transmission rod 9 to rotate clockwise or counterclockwise along the axis of the honing head 8 through the honing rod, and then the expansion and contraction mechanism joint 902 drives the gear sleeve assembly 2 of the gear reducer of the present invention to make forward or reverse planetary rotation along the axis of the honing head 8 through the eccentric wheel 4.
When the gear sleeve component 2 rotates in a forward planetary way, the gear shaft component 1 rotates in a backward speed reduction way and drives the rack 804 to retract in a radial direction; when the gear sleeve component 2 rotates in a reverse planet way, the gear shaft component 1 rotates in a forward speed reduction way and drives the rack 804 to expand radially, and an expansion and contraction system of the machine tool is automatically adjusted by a hydraulic system, so that good contact and constant pressure between honing oilstones and the hole wall of a part are ensured.
The small tooth difference planetary gear transmission and the common small tooth difference planetary gear transmission belong to the internal gear transmission, and the difference is that: in the conventional small-tooth-difference planetary gear transmission, an inner gear serves as a central gear, an outer gear serves as a planetary gear, and an output mechanism is required to transmit the rotary motion of the planetary gear to a low-speed output shaft. In the small-tooth-difference planetary gear transmission, an outer gear, namely the gear 13, is used as a central gear, an inner gear, namely the gear sleeve component 2, is used as a planetary gear, and the planetary gear sleeve component 2 directly transmits rotary motion to the gear shaft component 1 through the gear 13 to output.
The gear reducer expands the application range of the transmission principle of the planetary gear with small tooth difference, is applied to the design and manufacture of honing tools, realizes the reverse speed reduction of the honing oilstone expansion and contraction mechanism, and ensures that the radial expansion and contraction process of the honing oilstone is more stable and has smaller impact.
The above examples are set forth so that this disclosure will be understood in all instances to be considered illustrative and not restrictive, and that various modifications and equivalent arrangements may be devised by those skilled in the art after reading this disclosure and are intended to be included within the scope of the appended claims.
Claims (10)
1. A gear reducer is characterized by comprising a gear shaft assembly (1), a gear sleeve assembly (2) and an eccentric wheel (4);
the gear shaft assembly (1) comprises a gear shaft (11) and a gear (13), the gear (13) is fixedly connected to the right end of the gear shaft (11), and the gear shaft (11) is installed in a honing head (8) substrate and connected with a honing head (8);
the gear sleeve component (2) comprises an inner gear sleeve (22) and an end cover (23), the inner gear sleeve (22) is meshed with the gear (13), the difference between the number of teeth of the inner gear sleeve (22) and the number of teeth of the gear (13) is not more than 4, and the end cover (23) is arranged to be tightly attached to the right end face of the inner gear sleeve (22);
the eccentric wheel (4) comprises a positioning cylindrical surface (401), a third fixing hole (402) and a fourth fixing hole (404), the left end of the eccentric wheel (4) is sleeved in the end cover (23) through the positioning cylindrical surface (401), meanwhile, the gear shaft (11) is sleeved through the third fixing hole (402), the right end of the eccentric wheel (4) is connected with the transmission rod (9) through the fourth fixing hole (404), and an eccentric distance e is reserved between the center line of the positioning cylindrical surface (401) and the center lines of the third fixing hole (402) and the fourth fixing hole (404).
2. A gear reducer according to claim 1, further comprising a positioning gear (3), wherein the positioning gear (3) is a T-shaped sleeve structure with straight teeth at one end, the first fixing hole (301) is formed in the side wall of the cylindrical end of the positioning gear (3), and the positioning gear (3) is sleeved on the gear shaft (11) of the gear shaft assembly (1) through a second fixing hole (302) in the center of the sleeve structure of the positioning gear.
3. A gear reducer according to claim 2 wherein the gear sleeve assembly (2) further comprises an outer gear sleeve (21), the outer gear sleeve (21) is of a circular ring structure, the inner gear sleeve (22) and the end cover (23) are respectively nested at the middle and right ends of the outer gear sleeve (21), the left end of the outer gear sleeve (21) is meshed with the straight-face gear end of the positioning gear (3), and the difference between the number of teeth of the outer gear sleeve (21) and the number of teeth of the positioning gear (3) is not more than 4.
4. The gear reducer according to claim 3, wherein the inner ring surface of the outer gear sleeve (21) is preset with outer gear sleeve inner teeth (211), a first step surface (212) and a second step surface (213); two symmetrical positioning teeth (221) are preset on the outer circular surface of the inner gear sleeve (22), and the inner circular surface is inner gear sleeve teeth (222); the end cover (23) is a circular sheet with a central hole, and the left end of the end cover (23) is provided with an end cover end face step hole (231);
the outer circular surface of the inner gear sleeve (22) is in transition fit with the first step surface (212) of the outer gear sleeve (21); the end cover (23) is in interference fit with the second step surface (213).
5. A gear reducer according to claim 1, characterised in that the gear shaft assembly (1) further comprises a locating sleeve (12), the locating sleeve (12) being of annular configuration; a third step surface (111) and a fourth step surface (112) are arranged at the right end of the gear shaft (11), a part of tooth form is cut off from the third step surface (111), the fourth step surface (112) is a cylindrical surface, and a threaded hole (113) is formed in the end part of the cylindrical surface; and the positioning sleeve (12) and the gear (13) are sequentially sleeved at the third step surface (111) of the gear shaft (11) in an interference fit manner from left to right.
6. A gear reducer according to claim 1, wherein the gear (13) is provided with external gear teeth (131), internal gear teeth (132), the external gear teeth (131) are of a convex arc surface tooth structure, the internal gear teeth (132) are of a straight surface tooth structure, and the left end of the gear (13) is provided with a gear cone surface (133).
7. A gear reducer according to any one of claims 1-6 further comprising a bushing (6), wherein the bushing (6) is sleeved on the gear shaft (11) through a bushing stepped hole (601) at the left end of the bushing, and a counter bore (602) is further formed at the right end of the bushing (6).
8. A gear reducer according to claim 7 in which a spacer (5) is also provided between the bushing (6) and the pinion (11).
9. A honing oilstone radial expansion and contraction mechanism, which is characterized by comprising the gear reducer according to any one of claims 1-8, and further comprising a honing head (8) and a transmission rod (9), wherein a rack (804) of the honing head (8) is meshed with a gear shaft (11) of the gear reducer, the transmission rod (9) is of a universal connection structure, one end of the transmission rod (9) is connected with a fourth fixing hole (404) on an eccentric wheel (4) of the gear reducer, and the other end of the transmission rod is connected with a honing rod of a machine tool.
10. The honing oilstone radial expansion and contraction mechanism according to claim 9, wherein the transmission rod (9) comprises a transmission rod fixing hole (901) and an expansion and contraction mechanism joint (902), the honing head (8) is provided with a threaded fixing hole (801) on the base body, the expansion and contraction mechanism joint (902) is inserted into the fourth fixing hole (404) of the eccentric wheel (4), and the transmission rod fixing hole (901) and the threaded fixing hole (801) are penetrated through by a step screw (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395564.0A CN115750687A (en) | 2022-11-09 | 2022-11-09 | Gear reducer and honing oilstone radial expansion and contraction mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395564.0A CN115750687A (en) | 2022-11-09 | 2022-11-09 | Gear reducer and honing oilstone radial expansion and contraction mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115750687A true CN115750687A (en) | 2023-03-07 |
Family
ID=85368768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211395564.0A Pending CN115750687A (en) | 2022-11-09 | 2022-11-09 | Gear reducer and honing oilstone radial expansion and contraction mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115750687A (en) |
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2022
- 2022-11-09 CN CN202211395564.0A patent/CN115750687A/en active Pending
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