CN210435797U - Variable speed tool bit driving head - Google Patents

Abstract

The utility model relates to a variable speed tool bit drive head. The technical scheme is as follows: the electric tool comprises a shell, a mounting plate, an end cover, a bolt, a variable speed transmission part, a gear ring, a planet wheel, a spline sun wheel, a planet wheel carrier, an output shaft, an electric telescopic rod fixing plate, a bearing, a tool mounting head, a motor, a spline shaft and an internal key. The utility model discloses a set up the spline axle sleeve between motor shaft, planet wheel reduction gears and output shaft, through the motion of electric telescopic rod drive spline axle sleeve, realize two kinds of motion modes of linkage between motor shaft, planet wheel reduction gears and the output shaft three and the linkage between motor shaft and the output shaft. The whole device realizes the switching between a high-speed gear and a low-speed gear in a mechanical structure speed reduction mode, so that the speed control of the cutter is more perfect, the performance requirement on the motor is reduced, the damage of the motor caused by the overlarge self rotating speed regulation amplitude of the motor is avoided, and the motor is better protected.

Description

Variable speed tool bit driving head

Technical Field

The utility model belongs to the technical field of processing machinery, a variable speed tool bit driving head is related to.

Background

The mechanical processing mainly comprises two types of manual processing and numerical control processing. Manual machining refers to a method in which a machinist manually operates mechanical equipment such as a milling machine, a lathe, a drilling machine, and a sawing machine to machine various materials. The manual machining is suitable for small-batch and simple part production. Numerical control machining (CNC) refers to a machine worker machining by using numerical control equipment, which includes a machining center, a turning and milling center, a wire electric discharge machine, a thread cutting machine, and the like. The method is characterized in that the tool bit is controlled to move relative to a tool to be machined in any machining mode, the rotation of the tool bit is controlled for milling, drilling, grinding and the like, the rotating speed of the tool needs to be controlled in different machining processes even in the process of machining by the same tool, the rotating speed of the motor is controlled to control the speed, the motor is required to be controlled in the mode, and the performance requirement on the motor can be reduced if the mode realizes the switching of different speeds in a mechanical mode.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, the utility model discloses a variable-speed cutter head driving head, which adopts the technical proposal that the driving head comprises a shell, a mounting plate is fixedly connected with the side part of the shell, an end cover is fixedly arranged on the upper end surface of the shell through a bolt, a motor is fixedly arranged on the upper part of the inner cavity of the shell, a spline shaft is fixedly connected on the rotating shaft of the motor, an internal key is arranged on the spline shaft, a variable-speed transmission part is arranged in the middle part of the inner cavity of the shell, the variable-speed transmission part is connected with the motor through the spline shaft, the output end of the variable-speed transmission part is fixedly connected with a cutter mounting head, the variable-speed transmission part is a planetary gear transmission structure and comprises a toothed ring fixedly connected with the inner wall of the shell, a spline sun gear which is slidably arranged, the novel electric tool is characterized in that three planet wheels are rotatably mounted on the planet wheel carrier, the planet wheels are matched with the gear ring and the spline sun wheel, the lower end of the planet wheel carrier is fixedly connected with an output shaft, a bearing is mounted on the output shaft in an interference fit manner, the outer ring of the bearing is installed in an interference fit manner, the output shaft is coaxial with the spline sun wheel and is fixedly connected with the lower end of the output shaft, the tool is mounted on the end of the tool, an electric telescopic rod fixing plate is fixedly connected to the bottom of a rotating shaft of the motor, three electric telescopic rods are fixedly mounted on the electric telescopic rod fixing plate, and the electric telescopic rods surround the rotating shaft of the motor and are evenly distributed and fixedly.

As an optimized scheme of the utility model, spline sun gear includes spline shaft sleeve portion, spline shaft sleeve portion one end fixed connection gear portion, gear portion with planet wheel cooperation installation, fixedly connected with external key on the outer lane wall of spline shaft sleeve portion, external key with planet wheel carrier sliding fit opens on the inner circle wall has inside keyway, inside keyway with inside key cooperation installation.

As the utility model discloses an optimal scheme, the planet wheel carrier includes the disc support body, the three planet wheel pivot of fixed surface connection on the disc support body, the installation of rotating in the planet wheel pivot the planet wheel, disc support body center is opened there is the centre bore, outside keyway has evenly been seted up to the centre bore inner wall, outside keyway with outside key sliding fit.

As an optimized scheme of the utility model, the aperture of centre bore is greater than the external diameter of spline shaft housing portion.

As an optimized scheme of the utility model, the tip notch of outside keyway is tubaeform opening.

The utility model has the advantages that: the utility model discloses a set up the spline axle sleeve between motor shaft, planet wheel reduction gears and output shaft, through the motion of electric telescopic rod drive spline axle sleeve, realize two kinds of motion modes of linkage between motor shaft, planet wheel reduction gears and the output shaft three and the linkage between motor shaft and the output shaft. The whole device realizes the switching between a high-speed gear and a low-speed gear in a mechanical structure speed reduction mode, so that the speed control of the cutter is more perfect, the performance requirement on the motor is reduced, the damage of the motor caused by the overlarge self rotating speed regulation amplitude of the motor is avoided, and the motor is better protected.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a sectional view of the internal structure of the present invention;

FIG. 3 is a sectional view of the internal structure of the present invention;

FIG. 4 is a schematic view of the installation of the motor shaft and the spline sun gear of the present invention;

fig. 5 is a schematic structural view of the spline sun gear of the present invention;

fig. 6 is a schematic structural diagram of the planetary carrier of the present invention.

In the figure: 1-shell, 2-mounting plate, 3-end cover, 4-bolt, 5-speed-changing transmission part, 501-toothed ring, 502-planet wheel, 503-spline sun wheel, 5031-spline shaft sleeve part, 5032-gear part, 5033-external key, 5034-internal key slot, 504-planet wheel carrier, 5041-disc carrier body, 5042-planet wheel rotating shaft, 5043-central hole, 5044-external key slot, 505-output shaft, 506-electric telescopic rod, 507-electric telescopic rod fixing plate, 508-bearing, 6-cutter mounting head, 7-motor, 701-spline shaft and 702-internal key.

Detailed Description

Example 1

As shown in fig. 1 to 6, a variable speed tool bit drive head, the technical scheme of adoption is, including casing 1, 1 lateral part fixedly connected with mounting panel 2 of casing, 1 up end opening of casing and through 4 fixed mounting of bolt there is end cover 3, 1 inner chamber upper portion fixed mounting of casing has motor 7, fixedly connected with integral key shaft 701 in motor 7's the pivot, what set up on the integral key shaft 701 is inside key 702, 1 inner chamber mid-mounting of casing has variable speed drive portion 5, variable speed drive portion 5 with motor 7 passes through integral key shaft 701 connects just variable speed drive portion 5 output end fixed connection cutter installation head 6.

The variable speed transmission part 5 is a planetary gear transmission structure, and comprises a toothed ring 501 fixedly connected with the inner wall of the housing 1, a spline sun gear 503 slidably mounted on the spline shaft 701, and a planetary gear carrier 504 coaxially mounted with the spline sun gear 503, three planetary gears 502 are rotatably mounted on the planetary gear carrier 504, the planetary gears 502 are mounted with the toothed ring 501 and the spline sun gear 503 in a matching manner, the lower end of the planetary gear carrier 504 is fixedly connected with an output shaft 505, a bearing 508 is mounted on the output shaft 505 in an interference fit manner, the outer ring of the bearing 508 is mounted with the housing 1 in an interference fit manner, the output shaft 505 is coaxial with the spline sun gear 503 and the spline shaft 701 and is fixedly connected with the cutter mounting head 6 at the lower end of the output shaft 505, an electric telescopic rod fixing plate 507 is fixedly connected to the bottom of the rotating shaft of the motor 7, and three electric telescopic rods 506 are fixedly, the electric telescopic rods 506 are uniformly distributed around the rotating shaft of the motor 7 and are fixedly connected with the spline sun wheel 503.

The spline sun gear 503 comprises a spline shaft sleeve portion 5031, one end of the spline shaft sleeve portion 5031 is fixedly connected with a gear portion 5032, the gear portion 5032 is installed in a matched manner with the planet gear 502, an external key 5033 is fixedly connected to the outer ring wall of the spline shaft sleeve portion 5031, the external key 5033 is in sliding fit with the planet carrier 504, an internal key groove 5034 is formed in the inner ring wall, and the internal key groove 5034 is installed in a matched manner with the internal key 702.

The planet carrier 504 comprises a disc frame body 5041, the upper surface of the disc frame body 5041 is fixedly connected with three planet wheel rotating shafts 5042, the planet wheels 502 are rotatably mounted on the planet wheel rotating shafts 5042, a central hole 5043 is formed in the center of the disc frame body 5041, external key grooves 5044 are uniformly formed in the inner wall of the central hole 5043, and the external key grooves 5044 are in sliding fit with the external keys 5033.

The bore diameter of the central bore 5043 is larger than the outer diameter of the spline shaft sleeve portion 5031.

The end notches of the external splines 5044 are flared openings.

The utility model discloses a theory of operation: the spline sun wheel 503 is slidably fitted on the spline shaft 701, and is driven by the electric telescopic rod 506 to slide on the spline shaft 701 and rotate with the spline shaft 701, and the electric telescopic rod 506 rotates with the rotating shaft of the motor 7 and the spline sun wheel 503 synchronously. When the output shaft 505 needs to rotate at a low speed, the electric telescopic rod 506 is in a contracted state, so that the gear portion 5032 on the spline sun gear 503 is meshed with the planet gear 502, the spline shaft sleeve portion 5031 falls off the planet gear carrier 504, the motor 7 drives the spline shaft 701 to rotate, the spline shaft 701 drives the spline sun gear 503 to rotate, the spline sun gear 503 drives the planet gear 502 to move on the gear ring 501, and the planet gear carrier 504 is driven to move so that the output shaft 505 rotates at a low speed; when the output shaft 505 needs to rotate at a high speed, the electric telescopic rod 506 extends to push the spline sun gear 503 to slide so as to be separated from the planet gear 502, the spline sleeve portion 5031 is inserted into the central hole 5043, the trumpet-shaped opening of the external key groove 5044 enables the external key 5033 to be inserted into the central hole more easily in an aligned manner, the spline sleeve portion 5031 is inserted into the central hole 5043 to enable the spline sun gear 503 to be circumferentially connected with the planet gear carrier 504, and therefore when the motor 7 drives the spline sun gear 503 to rotate, the spline sun gear 503 directly drives the planet gear carrier 504 to rotate, and the output shaft 505 rotates at a high speed.

Components and circuit portions not described in detail herein are prior art.

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art, and modifications or variations without creative efforts are still within the scope of the present invention.

Claims (5)

1. A variable speed bit drive head, comprising: including casing (1), casing (1) lateral part fixedly connected with mounting panel (2), casing (1) up end opening and through bolt (4) fixed mounting have end cover (3), casing (1) inner chamber upper portion fixed mounting has motor (7), fixedly connected with integral key shaft (701) in the pivot of motor (7), what set up on integral key shaft (701) is inside key (702), casing (1) inner chamber mid-mounting has variable speed drive portion (5), variable speed drive portion (5) with motor (7) pass through integral key shaft (701) are connected just variable speed drive portion (5) output end fixed connection cutter installation head (6), variable speed drive portion (5) are planet wheel drive structure, its include with casing (1) inner wall fixed connection's ring gear (501), slidable mounting be in spline shaft (701) on spline shaft (503) and with spline sun gear (503) coaxial arrangement's line of going up sun gear (503) coaxial arrangement The cutter mounting device comprises a planet carrier (504), wherein three planet wheels (502) are rotatably mounted on the planet carrier (504), the planet wheels (502) are mounted with a toothed ring (501) and a spline sun wheel (503) in a matched mode, the lower end of the planet carrier (504) is fixedly connected with an output shaft (505), a bearing (508) is mounted on the output shaft (505) in an interference fit mode, the outer ring of the bearing (508) is mounted with a shell (1) in an interference fit mode, the output shaft (505) is mounted with the spline sun wheel (503) and a spline shaft (701) in a coaxial mode, the lower end of the output shaft (505) is fixedly connected with a cutter mounting head (6), an electric telescopic rod fixing plate (507) is fixedly connected to the bottom of a rotating shaft of a motor (7), three electric telescopic rods (506) are fixedly mounted on the electric telescopic rod fixing plate (507), the electric telescopic rods (506) are uniformly distributed around the rotating shaft of the motor (7 ).

2. The variable speed bit drive head of claim 1, wherein: the spline sun gear (503) comprises a spline shaft sleeve part (5031), one end of the spline shaft sleeve part (5031) is fixedly connected with a gear part (5032), the gear part (5032) is installed in a matched mode with the planet gear (502), an external key (5033) is fixedly connected to the outer ring wall of the spline shaft sleeve part (5031), the external key (5033) is in sliding fit with the planet gear carrier (504), an internal key groove (5034) is formed in the inner ring wall, and the internal key groove (5034) is installed in a matched mode with the internal key (702).

3. The variable speed bit drive head of claim 2, wherein: planet wheel carrier (504) includes disc support body (5041), fixed surface is connected with three planet wheel pivot (5042) on disc support body (5041), the installation of rotating on planet wheel pivot (5042) planet wheel (502), disc support body (5041) center is opened there is centre bore (5043), outside keyway (5044) have evenly been seted up to centre bore (5043) inner wall, outside keyway (5044) with outside key (5033) sliding fit.

4. A variable speed bit drive head as claimed in claim 3, wherein: the bore diameter of the central bore (5043) is greater than the outer diameter of the spline sleeve portion (5031).

5. A variable speed bit drive head as claimed in claim 3, wherein: the end notch of the external keyway (5044) is flared.

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