TW202242339A - Electric tool transmission and rotation angle detection structure including a housing, a bearing, a hydraulic pulse mechanism, an electric drive mechanism, and an encoding mechanism - Google Patents

Abstract

The present invention discloses an electric tool transmission and rotation angle detection structure, which includes a housing, a bearing, a hydraulic pulse mechanism, an electric drive mechanism, and an encoding mechanism. The housing includes a front end cover, a shaft section and a rear end cover sequentially connected in series. The bearing is accommodated in the shaft section. The hydraulic pulse mechanism is accommodated in the front end cover and has a driving shaft and a transmission member protruding from both ends of the front end cover. The electric drive mechanism is assembled on the shaft section and connected with the transmission member to move simultaneously and includes an outer rotor motor. A pressing nut is screwed to an outer rotor extension section of the outer rotor motor and presses the bearing. The encoding mechanism includes an encoding disc arranged on the outer periphery of the transmission member and an encoder arranged on the shaft section for matching the encoding disc. With the composition of the above components, the electric drive mechanism drives the hydraulic pulse mechanism to operate, the pulse torque is output from the drive shaft, and the encoding mechanism is used to obtain information such as the speed and angle of the drive shaft.

Description

Electric tool transmission and rotation angle detection structure

The invention relates to the technical field related to electric hand tools, in particular to an electric tool transmission and rotation angle detection structure.

According to the field of pneumatic or electric tools that can generate impact force, they can be roughly divided into two types: direct impact type and oil pressure pulse type; among them, oil pressure pulse type tools have longer life, low noise, small vibration, etc. Features, widely loved by the industry.

In order to be able to control the output torque of the oil pressure pulse tool, the previous technology will design a stop structure inside the tool according to the built-in pressure. However, this kind of stop mechanism uses the pressure of the working oil as the driving source, and the pressure of the working oil is also used. It is easily affected by the locking operation or the rise of oil temperature, causing the pressure sometimes to exceed the predetermined value prematurely, or it cannot be in a stable state during the operation, so there will be a misjudgment that the rotation torque value is not reached before stopping, which may cause Locking is too tight or too loose.

In view of the above-mentioned problems and deficiencies of the prior art, the main purpose of the present invention is to provide an electric tool transmission and rotation angle detection structure, which solves the deficiencies of the prior art through the innovative design of the structure.

According to the above objectives of the present invention, the present invention proposes an electric tool transmission and rotation angle detection structure, which includes a housing, a bearing, an oil pressure pulse mechanism, an electric drive mechanism, and an encoding mechanism. The casing includes a front end cover, a shaft section and a rear end cover sequentially connected in series. The bearing system is placed in the shaft section. The hydraulic pulse mechanism is Accommodated in the front end cover has a driving shaft protruding from both ends of the front end cover and a transmission part. The electric drive mechanism is assembled on the shaft section and is connected with the transmission part to move simultaneously, and includes an outer rotor motor. The tight nut is screwed on the outer rotor extension of the outer rotor motor and resists the bearing. The encoding mechanism includes a set of encoding discs arranged on the outer peripheral side of the transmission part, and a set of encoders arranged on the matching encoding discs of the shaft body. With the composition of the above-mentioned components, the electric drive mechanism pulls the oil pressure pulse mechanism to act, and the pulse torque is output from the drive shaft, and cooperates with the encoding mechanism to obtain information such as the speed and angle of the drive shaft.

10: Housing

11:Front cover

12: axis body

13: rear end cover

121: Assembly Room

122: Palin Room

123: C buckle slot

124: electric drive room

125: contact hole

21: Palin

22: C buckle

23: Compression nut

30: Hydraulic pulse mechanism

31: drive shaft

32: Transmission parts

40: Electric drive mechanism

41: Outer rotor motor

411: Outer rotor

411A: extension

42: Heat sink

43: fan

50: coding mechanism

51: Coding disk

52: Encoder

A1: Gun grip

B: Partition

B1: cooling hole

[Fig. 1] is a schematic diagram of an embodiment of the present invention.

[Fig. 2] is an exploded schematic view of the partial components of the embodiment shown in Fig. 1.

[Fig. 3] is a schematic partial cross-sectional view of the embodiment shown in Fig. 1.

Hereinafter, please refer to the related drawings to further illustrate the embodiment of the electric tool transmission and rotation angle detection structure of the present invention. Various objects in the embodiments are drawn according to the proportions, sizes, deformations or displacements applicable to the description, rather than drawn according to the scale of the actual components, and are described first. And the elements with the same and symmetrical configurations in the remaining embodiments are denoted by the same numbers. In addition, directional terms such as "front, back, left, right, up, down, inside, outside" in the descriptions of the embodiments listed below are expressed in accordance with the specified viewing directions and cannot be interpreted as limitations of the present invention.

Please refer to Figures 1 to 3, the electric tool transmission and rotation angle detection structure of the present invention includes a housing 10, a bearing 21, a C buckle 22, an oil pressure pulse mechanism 30, and an electric drive mechanism 40 , and an encoding mechanism 50.

The above-mentioned housing 10 can be assembled on the front end of the gun-shaped handle A1 or the barrel-shaped handle (previous art, not shown in the figure); it includes a front end cover 11 connected in series, a shaft section 12 and a rear end cover 13.

The shaft body section 12 has a set of connection chambers 121 , a bearing chamber 122 , a C buckle groove 123 , an electric drive chamber 124 , and a connecting hole 125 .

The aforesaid assembly chamber 121 and bearing chamber 122 are concentrically connected with a depression formed on the sectional surface of one end of the shaft body section 12 . The section of one end of the assembly chamber 121 is further connected to the outside of the shaft section 12 , and matches the partial outer contour of one end of the front end cover 11 , and is assembled at one end of the front end cover 11 . During implementation, the connection between the assembly chamber 121 and the front end cover 11 can be achieved by adopting a matching screw connection structure.

The aforesaid C buckle groove 123 is recessed and formed at a predetermined position on the wall surface of the bearing chamber 122 .

The aforementioned electro-drive chamber 124 is recessed and formed on the truncated surface of the shaft section 12 away from the other end of the assembly chamber 121, and is separated from the bearing chamber 122 by a partition B. In practice, between the assembly chamber 121 and the electric drive chamber 124 , there are also a plurality of cooling holes B1 formed through the shaft section 12 .

The aforementioned connecting hole 125 penetrates through the partition B and communicates with the electric drive chamber 124 and the assembly chamber 121 .

The rear end cover 13 is adjacent to the electric driving chamber 124 and is arranged at the end of the shaft section 12 to limit the cross section of the open end of the electric driving chamber 124 . In practice, the rear end cover 13 is a ring-shaped profile.

Above-mentioned bearing 21 is contained in bearing room 122 of bearing.

The C buckle 22 is inserted into the C buckle groove 123 and pressed against the outer ring of the bearing 21, and restrains the bearing 21 against the partition B.

The above-mentioned hydraulic pulse mechanism 30 (previous technology) is stretched and accommodated in the front end cover 11 . It at least includes a drive shaft 31 protruding from opposite ends of the front cover 11 and a transmission member 32 .

The electric drive mechanism 40 is connected with the transmission member 32 of the hydraulic pulse mechanism 30 ; it includes an outer rotor motor 41 , a cooling member 42 and a fan 43 .

The outer rotor motor 41 is accommodated in the electric drive chamber 123, and the outer rotor 411 of the outer rotor motor 41 has an extension section 411A, which passes through the connecting hole 125 and the inner ring side of the bearing 21, and communicates with the oil pressure pulse The transmission member 32 of the mechanism 30 is connected.

The heat sink 42 is connected with the stator 412 of the outer rotor motor 41 after piercing the rear end cover 13, and is exposed outside the rear end cover 13, thereby transferring the heat source of the stator 412 to the outside of the rear end cover 13 for heat exchange.

The fan 43 is set in the gun-shaped handle A1 (or the cylindrical handle) corresponding to the cooling element 42 .

The above-mentioned tight nut 23 is screwed to the outer rotor 411 of the outer rotor motor 41 and its extension section 411A, resists the inner ring of the bearing 21, and cooperates with the C buckle 22 to constrain the bearing 21 together.

The above-mentioned encoding mechanism 50 (prior art) includes an encoding disc 51 and an encoder 52 .

The code disc 51 is set on the outer peripheral side of the transmission member 32 and moves with it.

The encoder 52 is assembled at the preset position of the 12 pairs of encoder discs 51 on the shaft body.

Therefore, the above is an introduction to the components and assembly methods of a preferred embodiment of the electric tool transmission and rotation angle detection structure provided by the present invention, and the operating features of the embodiment of the present invention are introduced as follows.

1 to 3, when the electric drive mechanism 40 is triggered, the outer rotor 411 of the outer rotor motor 41 rotates, so that the transmission part 32 of the extension section 411A pulls the oil pressure pulse mechanism 30 to move, and the oil pressure pulse The pulse torque generated by the mechanism 30 is output by the drive shaft 31 .

When the transmission part 32 of the oil pressure pulse mechanism 30 is driven by the electric drive mechanism 40, the code disc 51 assembled on the transmission part 32 also rotates synchronously, and cooperates with the code The sensing of the device 52 is used to obtain the rotational speed, angle, etc. of the transmission part 32, and can calculate and know the operation information of the drive shaft 31 of the hydraulic pulse mechanism 30.

The above description is only a preferred embodiment of the present invention, and is intended to clarify the characteristics of the present invention, and is not intended to limit the scope of the embodiments of the present invention. Those of ordinary skill in the art will make equivalent changes according to the present invention. , and changes well known to those skilled in the art should still fall within the scope of the present invention.

10: shell

11:Front cover

12: axis body

13: rear end cover

31: drive shaft

42: Heat sink

43: fan

A1: Gun grip

Claims (8)

A transmission and rotation angle detection structure of an electric tool, comprising: A casing, including a front end cover, a shaft section and a rear end cover sequentially connected in series; The shaft section, internally connected concentrically, has a group of connecting chambers, a bearing chamber, a connecting hole and an electric driving chamber in sequence; The front end cover is connected to the assembly chamber at one end; The rear end cover is assembled at one end of the shaft section to partially restrict the cross-section of the open end of the electric drive chamber; One bearing, which is contained in the bearing chamber; An oil pressure pulse mechanism, which is extended and accommodated in the front end cover, has a drive shaft protruding from the opposite ends of the front end cover and a transmission member; An electric drive mechanism is connected with the transmission member, including an outer rotor motor accommodated in the electric drive chamber; The outer rotor of the outer rotor motor has an extension section, which is connected to the transmission member after passing through the inner ring side of the bearing; a jam nut threaded onto the extension against the bearing; and An encoding mechanism includes a set of encoding discs arranged on the outer peripheral side of the transmission member, and a set of encoders arranged on the shaft to match the encoding discs. The electric tool transmission and rotation angle detection structure as described in claim 1, wherein one end of the housing is assembled with a gun-shaped handle. The electric tool transmission and rotation angle detection structure as described in claim 1, wherein one end of the housing is assembled with a cylindrical handle. The transmission and rotation angle detection structure of the electric tool as described in Claim 1, wherein the electric drive chamber and the bearing chamber are separated by a partition. The transmission and rotation angle detection structure of the electric tool as described in claim 1, wherein between the assembly chamber and the electric drive chamber, there are a plurality of heat dissipation holes passing through the shaft section to form communication. The transmission and rotation angle detection structure of the electric tool as described in claim 1, wherein the shaft section further includes a C buckle groove formed on the wall of the bearing chamber, which provides a C buckle to be inserted and pressed against the bearing outer ring. The electric tool transmission and rotation angle detection structure as claimed in claim 1, wherein the electric drive mechanism includes a heat sink connected to the stator of the outer rotor motor. The electric tool transmission and rotation angle detection structure as described in Claim 7, wherein the electric drive mechanism includes a fan assembled with a corresponding heat sink.

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