CN214699126U

CN214699126U - Reducer end cover

Info

Publication number: CN214699126U
Application number: CN202120074152.1U
Authority: CN
Inventors: 江立华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-11-12
Anticipated expiration: 2031-01-12

Abstract

The utility model relates to a reducer end cover in the technical field of electric tools, which comprises a cap and a shaft sleeve; the cap cover is of a cap-shaped structure and comprises a cap top, a cap brim and a cap enclosure, the cap top and the cap enclosure are respectively positioned on the upper surface and the lower surface of the cap brim, and one end of the cap top, which is far away from the cap brim, is provided with a shaft hole; the shaft sleeve is of a sleeve structure, and one end of the shaft sleeve extends into the shaft hole and is fixedly connected with the cap top. The utility model discloses a set up the axle sleeve on the reducer casing end cover for motor drive shaft is more steady at power transmission operation in-process, has improved the drive ratio.

Description

Reducer end cover

Technical Field

The utility model relates to an electric tool technical field specifically, relates to a reduction gear end cover.

Background

A transmission, also called a retarder, is a mechanism for changing the speed and torque from the engine, which can change the output and input shaft gear ratios, either fixed or in steps. The speed variator consists of speed-changing transmission mechanism and operating mechanism, and the transmission mechanism is mainly driven by common gear and also by planetary gear.

Currently, electric tools, especially hand-held electric tools, are widely used in various industries such as home decoration and construction. In the hand-held electric tool, due to the limitation of the structural installation space, in the transmission connection between the motor and the speed reducer in the prior art, the motor directly penetrates through the end cover of the speed reducer and then is in transmission connection with the gear, the transmission shaft outputs transmission force by means of the support of two points of the motor end and the gear end, and the stability is poor. In addition, in the structural design of the end cover of the speed reducer, the end cover of the speed reducer is connected with the shell of the speed reducer only through simple bolt connection fixation or simple clamping, and the structural stability is poor.

The prior art searches and finds that the Chinese utility model patent publication No. CN201916467U discloses a wheel reduction end cover, the end cover is fixedly connected with one side of the wheel reduction, and the outer edge of one side of the wheel reduction is provided with a lubricating oil feeding hole and a lubricating oil drain hole which are sealed by an oil drain plug; an oil filling indicating arrow is arranged on one side of the end cover of the hub reduction gear and points to the oil drain plug; an oil level inspection hole sealed by an inspection screw plug is further formed in one side of the oiling indication arrow, and when the hub reduction gear rotates to the vertical upward direction of the oiling indication arrow, the lowest point position of the oil level inspection hole is the upper limit position of the lubricating oil; when the hub reduction gear rotates to the vertical downward direction of an oiling indication arrow, the lowest point position of the oil level inspection hole is the lower limit position of the lubricating oil. The device is difficult to be adapted to a power tool.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a reduction gear end cover.

According to the utility model provides a reducer end cover, which comprises a cap and a shaft sleeve;

the cap cover is of a cap-shaped structure and comprises a cap top, a cap brim and a cap enclosure, the cap top and the cap enclosure are respectively positioned on the upper surface and the lower surface of the cap brim, and one end of the cap top, which is far away from the cap brim, is provided with a shaft hole;

the shaft sleeve is of a sleeve structure, and one end of the shaft sleeve extends into the shaft hole and is fixedly connected with the cap top.

In some embodiments, the inner peripheral surface of the shaft hole and the outer peripheral surface of the end portion of the sleeve extending into the shaft hole are in a matched polygonal shape.

In some embodiments, an ear cavity is formed along the inner surface of the crown and protrudes towards the outer surface, and an ear plate is arranged at the end part of the shaft sleeve and embedded in the ear cavity.

In some embodiments, the outer peripheral surface of the ear cavity is provided with a limiting groove, and the limiting groove is located at one end of the ear cavity far away from the shaft hole.

In some embodiments, a reinforcing plate is formed to extend from the connection of the crown and the brim toward the edge of the brim, the reinforcing plate is located on the outer surface of the brim, and the edge of the reinforcing plate is located inside the edge of the brim.

In some embodiments, the edge of the stiffener is located inward of the brim edge, and a tab is provided along the stiffener between the edge and the brim edge.

In some embodiments, the cap enclosure is a cylindrical cylinder structure, and the outer peripheral surface of the cap enclosure is provided with a convex rib.

In some embodiments, the ribs include a first rib and a second rib, and a width of the first rib is different from a width of the second rib.

In some embodiments, the outer circumferential surface of the shaft sleeve and/or the inner circumferential surface of the shaft sleeve are in a step-shaped structure.

In some embodiments, the cap and the sleeve are integrally formed of the same material, or the cap and the sleeve are made of different materials and integrally formed by an injection molding process.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a set up the axle sleeve on the reducer casing end cover for motor drive shaft is more steady at power transmission operation in-process, has improved the drive ratio.

2. The utility model discloses a design the outer peripheral face of axle sleeve for the step form, improved buffering and the absorption to the vibrations power, reduced the harmful effects that external vibrations caused the equipment operation.

3. The utility model discloses a with the inner peripheral surface design of axle sleeve for the step form, the accessible sets up bearing etc. in the inner peripheral surface of step form for the operation stability of the motor drive shaft who passes the bearing further improves.

4. The utility model discloses a to axle sleeve and cap connection fixed knot structure's optimal design, improve the fixed effect of axle sleeve, reduce because of the fixed not jail of axle sleeve causes transmission shaft moving influence.

5. The utility model discloses an optimal design limit structure on the cap reduces the adverse effect of axial exogenic force and radial external force to reduction gear end cover stability in the course of the work, and especially radial revolving force improves transmission effect.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the overall structure of the reducer end cover of the present invention;

FIG. 2 is a schematic view of the cap structure of the present invention;

FIG. 3 is a schematic view of the shaft sleeve structure of the present invention;

fig. 4 is the schematic view of the sectional structure of the end cover of the speed reducer of the present invention.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Example 1

The utility model provides a reduction gear end cover, it is as the intermediate junction spare between motor and the reduction gear, especially adapts to in hand-held type electric tool, like electric spanner. The end cover of the speed reducer comprises a cap 1 and a shaft sleeve 2, the shaft sleeve 2 is connected to the end of the cap 1 and forms an integral structure, the cap 1 is installed at the end of the main shell of the speed reducer of the electric tool, and the shaft sleeve 2 is used for a transmission shaft of a power supply machine to be in transmission connection with a gear in the speed reducer shell after passing through the transmission shaft. The cap cover 1 is a hat-shaped structure, in particular to a hat-shaped structure with a hat periphery, and comprises a hat top 11, a hat brim 12 and a hat periphery 13. The hat top 11 is a cylindrical barrel structure, and a shaft hole 110 is formed on the bottom plate of the hat top 11 of the barrel structure, and the shaft hole 110 is preferably formed by expanding outwards along the central axis of the hat top 11. The brim 12 is an annular plate extending outward in the radial direction of the crown 11 and formed to have a certain thickness, and the brim 12 is located at the port of the crown 11, i.e., at the end away from the shaft hole 110. The cap enclosure 13 is a cylindrical structure with two open ends, and one end of the cap enclosure is connected to the lower surface of the cap brim 12, where the lower surface refers to the surface facing away from the cap top 11, that is, the cap top 11 is located on the upper surface of the cap brim 12. The cap 13 is used to be sleeved with the reducer casing, that is, the outer peripheral surface of the cap 13 is attached to the inner peripheral surface of the reducer casing, or the outer peripheral surface of the reducer casing is attached to the inner peripheral surface of the cap 13. Preferably, the outer peripheral surface of the skirt 13 is bonded and fastened to the inner peripheral surface of the reduction gear case. Among the above, the cap top 11, the brim 12, and the brim 13 are preferably formed by integrally molding the same material to form the cap 1.

The shaft sleeve 2 is of a sleeve structure, one end of the shaft sleeve 2 is located in the shaft hole 110, and the end of the shaft sleeve 2 located in the shaft hole 110 is fixed with the cap top 11 into a whole, so that the shaft sleeve 2 and the cap cover form a reducer end cover of an integrated structure. There are various ways of fixing the sleeve 2 and the crown 11 as a single body, and preferably, both are formed as a single body by injection molding. When the sleeve 2 and the cap 1 are made of the same material, they can be integrally formed by injection molding, for example, they are made of resin material or aluminum alloy material. When the shaft sleeve 2 and the cap 1 are made of different materials, if the cap 1 is made of resin materials and the shaft sleeve 2 is made of aluminum alloy materials, the shaft sleeve 2 and the cap 1 can be fixedly connected into an integral structure through an injection molding process. The cap 1 and the shaft sleeve 2 are formed into an integral structure through an injection molding process, so that the overall structural strength of the end cover of the speed reducer can be ensured, the transmission stability of a motor transmission shaft is ensured, and the transmission ratio is improved.

The utility model discloses the theory of operation of reduction gear end cover does: the cap enclosure 13 of the cap 1 is connected with the reducer shell in an adaptive mode, and a transmission shaft of the motor penetrates through the cap top 11, the cap brim 12 and the cap enclosure 13 in sequence and then is connected with a gear in the reducer shell in a transmission mode after entering from one end of the shaft sleeve 2. The utility model discloses a set up the axle sleeve on the reducer casing end cover for motor drive shaft is more steady at power transmission operation in-process, has improved the drive ratio.

Furthermore, the outer peripheral surface of the shaft sleeve 2 is designed to be step-shaped, and the vibration force is buffered and absorbed by the stepped clamping butt joint. The inner circumferential surface of the shaft sleeve 2 is designed to be step-shaped, and a bearing and the like can be arranged in the step-shaped inner circumferential surface, so that the operation stability of the motor transmission shaft penetrating through the bearing is further improved.

Example 2

Embodiment 2 is formed on the basis of embodiment 1, and through the optimal design of the structure for connecting and fixing the shaft sleeve and the cap, the fixing effect of the shaft sleeve is improved, and the influence on the operation of the transmission shaft caused by the infirm fixing of the shaft sleeve is reduced. Specifically, the method comprises the following steps:

the inner circumferential surface of the shaft hole 110 is designed in a polygonal structure such as a triangle, a rectangle, a hexagon, etc. The outer peripheral surface of the end portion of the sleeve 2 extending into the shaft hole 110 is also designed to be polygonal, and has the same shape as the outer peripheral surface of the shaft hole 110, so that the end portion of the sleeve 2 can be matched with the shaft hole 110. The inner peripheral surface of shaft hole 110 sets up to assorted polygon structure with the outer peripheral surface of axle sleeve 2 tip, can effectively restrict axle sleeve 2 rotatory, ensures axle sleeve 2's stability, and then improves transmission shaft moving stability.

In some embodiments, the crown 11 is provided with outwardly convex ear cavities 111, and the ear cavities 111 are formed to protrude from the inner surface of the crown toward the outer surface. The number of ear cavities 111 may be 1 or more. Preferably, the number of ear cavities 111 is 2, distributed in a symmetrical manner on both sides of the crown 11. Suitably, the end of the sleeve 2 is provided with an ear plate 21, and when the end of the sleeve 2 is placed in the shaft hole 110, the ear plate 21 is inserted into the ear cavity 111. The number and the distribution of the positions of the ear plates 21 arranged at the end part of the shaft sleeve 2 are matched with the number and the positions of the ear cavities 111. The lug cavity 111 is formed by the convex of the crown 11 and the lug plate 21 matched with the end part of the shaft sleeve 2 is arranged at the end part of the shaft sleeve 2, so that the fixing effect of the shaft sleeve 2 can be further improved, and the influence on the operation of a transmission shaft caused by poor fixation can be reduced. In this embodiment, the inner circumferential surface of the shaft hole 110 and the outer circumferential surface of the sleeve 2 may be polygonal or circular.

Example 3

This embodiment 3 is formed on the basis of 1 or embodiment 2, through the limit structure of optimal design on the cap, reduces the adverse effect of axial external force and radial external force to the reduction gear end cover stability during operation, especially radial revolving force, improves the transmission effect. Specifically, the method comprises the following steps:

the cap top 11 part in the cap 1 structure has been seted up spacing groove 1110 on the outer peripheral face of cap top 11, and after spacing groove 1110 was used for combining with the protruding portion of outside casing, it was spacing to realize cap 1 through the external force of casing, and then reached the spacing to the reduction gear end cover, especially radial direction's rotation. Preferably, the limiting groove 1110 is opened at the end of the ear cavity 111, i.e. the limiting groove 1110 is located on the outer peripheral surface of the end of the ear cavity 11 far away from the shaft hole 110.

In the brim 12 part of the cap 1 structure, a reinforcing plate 14 is arranged on the upper surface of the brim 12, the reinforcing plate 14 is a connecting structure plate with certain thickness formed by extending from the joint of the crown 11 and the brim 12 to the edge direction of the brim 12, and the edge of the reinforcing plate 14 is positioned inside the edge of the brim 12. The edge of the reinforcing plate 14 is positioned within the edge of the brim 12 and can be clamped by the structure of the shell, so that the fixing effect is improved. Furthermore, a bump 140 is arranged between the edge of the reinforcing plate 14 and the edge of the brim 12, and after the bump is in fit connection with the groove structure of the shell, effective clamping position can be further formed, and the fixing effect of the end cover of the speed reducer is improved. Preferably, the number of the protrusions 140 is two and the protrusions are symmetrically disposed on the plate surface of the brim 12. Further preferably, a central connecting line of the two protrusions 140 is perpendicular to a central connecting line of the two symmetrically disposed limiting grooves 1110, so as to form a group of multi-point limiting fixing structures.

The cap enclosure 13 of the structure of the cap 1 is provided with a convex rib 130 on the outer circumferential surface of the cap enclosure 13, and the convex rib 130 is adapted to the groove on the inner circumferential surface of the reducer casing and used for limiting the radial rotation of the cap 1. The number of the ribs 130 is at least 1, preferably a plurality of ribs 130, and the plurality of ribs 130 are preferably uniformly distributed along the outer circumferential surface of the cap 13 at equal intervals. Further, the plurality of ribs 130 distributed on the outer circumferential surface of the cap 13 include two structures with different widths, which are respectively marked as a first rib 1301 and a second rib 1302. The difference of first protruding muscle 1301 and second protruding muscle 1302 width can produce the step stress effect to match cap 1 and receive the revolving force of radial variation in size, the difference of protruding muscle width has certain positioning action to the installation of cap 13 with the reduction gear casing simultaneously, improves assembly speed. Furthermore, a groove 1303 is arranged on the back surface of the first rib 1301 or the second rib 1302 with wider width, and the groove 1303 is used for being matched and connected with structures such as a gear holder in the speed reducer shell.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. The reducer end cover is characterized by comprising a cap (1) and a shaft sleeve (2);

the cap cover (1) is of a cap-shaped structure and comprises a cap top (11), a cap brim (12) and a cap enclosure (13), the cap top (11) and the cap enclosure (13) are respectively positioned on the upper surface and the lower surface of the cap brim (12), and one end, far away from the cap brim (12), of the cap top (11) is provided with a shaft hole (110);

the shaft sleeve (2) is of a sleeve structure, and one end of the shaft sleeve (2) extends into the shaft hole (110) and is fixedly connected with the cap top (11).

2. The reducer end cover according to claim 1, wherein the inner peripheral surface of the shaft hole (110) is polygonal, and the outer peripheral surface of the end portion of the sleeve (2) extending into the shaft hole (110) is polygonal to fit the inner peripheral surface of the shaft hole (110).

3. Reducer end cover according to claim 1 or 2, characterized in that an ear cavity (111) is formed along the inner surface of the crown (11) and protruding towards the outer surface, and the end of the shaft sleeve (2) is provided with an ear plate (21), and the ear plate (21) is embedded in the ear cavity (111).

4. The reducer end cover according to claim 3, wherein a limiting groove (1110) is formed in the outer peripheral surface of the ear cavity (111), and the limiting groove (1110) is located at one end, away from the shaft hole (110), of the ear cavity (111).

5. The end cover of the speed reducer according to claim 1, characterized in that a reinforcing plate (14) is formed to extend from the junction of the crown (11) and the brim (12) toward the edge of the brim (12), the reinforcing plate (14) being located on the upper surface of the brim (12), the edge of the reinforcing plate (14) being located inward of the edge of the brim (12).

6. Retarder end cover according to claim 5, characterised in that a projection (140) is provided between the edge of the reinforcement plate (14) and the edge of the brim (12).

7. The reducer end cover according to claim 1, wherein the cap enclosure (13) is of a cylindrical barrel structure, and the outer peripheral surface of the cap enclosure (13) is provided with a convex rib (130).

8. The retarder end cover according to claim 7, wherein the ribs (130) comprise a first rib (1301) and a second rib (1302), the first rib (1301) having a width that is different from a width of the second rib (1302).

9. Reducer end cover according to claim 1, characterized in that the outer circumference of the sleeve (2) and/or the inner circumference of the sleeve (2) are/is of a step-like structure.

10. Reducer end cover according to any of claims 1-2 or 4-9, characterized in that the cap (1) and the sleeve (2) are integrally formed of the same material, or the cap (1) and the sleeve are integrally formed of different materials by injection molding.