TWI771989B - Electric tool transmission and rotation angle detection structure - Google Patents

Abstract

The invention discloses an electric tool transmission and rotation angle detection structure, which comprises a casing, 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 serially connected in sequence. The bearing system is accommodated in the shaft section. The oil pressure pulse mechanism is accommodated in the front end cover and has a drive 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 element to move together, including an outer rotor motor. The tightening nut is screwed to the outer rotor extension of the outer rotor motor and resists the bearing. The encoding mechanism includes a set of encoder discs arranged on the outer peripheral side of the transmission element, and a set of encoders arranged on the shaft body section matching the encoder discs. With the composition of the above components, the electric drive mechanism pulls the hydraulic pulse mechanism to act, outputs the pulse torque from the drive shaft, and cooperates with the coding mechanism to obtain the information such as the rotational speed and angle of the drive shaft.

Description

Electric tool transmission and rotation angle detection structure

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

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

In order to be able to control the output torque of the hydraulic pulse tool, the prior art designs a stop structure inside the tool according to the built-in pressure. However, this type of stop mechanism uses the pressure of the working oil as the driving source, and the pressure of the working oil is It is easy to be affected by the locking operation or the rise of oil temperature, causing the pressure 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 stop has not reached the rotation torque value, which may cause The lock is too tight or too loose.

In view of the above 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 innovative design of the structure.

According to the above purpose of the present invention, the present invention proposes an electric tool transmission and rotation angle detection structure, which includes a casing, 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 serially connected in sequence. The bearing system is accommodated in the shaft section. The oil pressure pulse mechanism is The front end cover is accommodated with a drive shaft and a transmission member protruding from both ends of the front end cover. The electric drive mechanism is assembled on the shaft body and connected with the transmission element to move together, including an outer rotor motor. The tightening nut is screwed to the outer rotor extension of the outer rotor motor and resists the bearing. The encoding mechanism includes a set of encoder discs arranged on the outer peripheral side of the transmission element, and a set of encoders arranged on the shaft body section matching the encoder discs. With the composition of the above components, the electric drive mechanism pulls the hydraulic pulse mechanism to act, outputs the pulse torque from the drive shaft, and cooperates with the coding mechanism to obtain the information such as the rotational speed and angle of the drive shaft.

10: Shell

11: Front cover

12: Axis body segment

13: Rear end cover

121: Assembly room

122: Bearing room

123:C buckle slot

124: Electric drive room

125: Contact hole

21: Palin

22: C buckle

23: Tighten the nut

30: Oil pressure pulse mechanism

31: Drive shaft

32: Transmission parts

40: Electric drive mechanism

41: External rotor motor

411: Outer rotor

411A: Extension

42: heat sink

43: Fan

50: Coding Agency

51: Code disc

52: Encoder

A1: Gun Grip

B: Partition

B1: heat dissipation 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.

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

Hereinafter, please refer to the related drawings to further describe the structural embodiments of the electric tool transmission and rotation angle detection of the present invention. Various objects in the embodiments are drawn according to the scale, size, deformation or displacement suitable for the description, rather than the scale of the actual element, which will be described first. In the remaining embodiments, the same and symmetrically arranged elements are denoted by the same numerals. In addition, the directional terms such as "front, rear, left, right, up, down, inner, outer" in the description of each embodiment listed below are expressed in accordance with the specified view direction, and cannot be used as an interpretation of the limitation of the present invention.

Please refer to FIGS. 1 to 3 , the electric tool transmission and rotation angle detection structure of the present invention includes a casing 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 casing 10 can be assembled at the front end of the gun-shaped handle A1 or the cylindrical handle (prior art, not shown in the figure); it includes a front-end cover 11 and a shaft body that are serially connected in series 12 and a rear end cover 13.

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

The aforementioned assembling chamber 121 and the bearing chamber 122 are concentrically communicated with each other and are formed on the sectional surface of one end of the shaft body section 12 . The cross section of one end of the assembly chamber 121 is further connected to the outside of the shaft body section 12 , and matches the partial outer contour of one end of the front end cover 11 , and is assembled to one end of the front end cover 11 . In practice, the connection between the assembly chamber 121 and the front end cover 11 can be achieved by a matching screw structure.

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

The aforementioned electric drive chamber 124 is recessed and formed on the sectional 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. During implementation, between the assembly chamber 121 and the electric drive chamber 124 , a plurality of heat dissipation holes B1 formed through the shaft body section 12 are further included.

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

The rear end cover 13 is assembled at the end of the shaft section 12 adjacent to the electric drive chamber 124 to limit the cross section of the open end of the electric drive chamber 124 . When implemented, the rear end cover 13 has an annular profile.

The above-mentioned bearing 21 is accommodated in the bearing chamber 122 .

The above-mentioned C buckle 22 is inserted into the C buckle groove 123 and presses against the outer ring of the bearing 21 , and restrains the bearing 21 from abutting against the partition B.

The above-mentioned hydraulic pulse mechanism 30 (prior art) is penetrated and accommodated in the front end cover 11 . At least it includes a drive shaft 31 and a transmission member 32 protruding from opposite ends of the front end cover 11 .

The above-mentioned electric drive mechanism 40 is connected to the transmission member 32 of the hydraulic pulse mechanism 30 ; it includes an outer rotor motor 41 , a heat dissipation 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 penetrates the connecting hole 125 and the inner ring side of the bearing 21, and is connected with the oil pressure pulse. The transmission member 32 of the mechanism 30 is connected.

The heat sink 42 extends through the rear end cover 13 and is connected to the stator 412 of the outer rotor motor 41 , 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 heat-dissipating member 42 .

The above-mentioned tightening nut 23 is screwed to the extension 411A of the outer rotor 411 of the outer rotor motor 41 , presses against the inner ring of the bearing 21 , and cooperates with the C buckle 22 to jointly restrain the bearing 21 .

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

The encoder disk 51 is assembled on the outer peripheral side of the transmission member 32 and moves with it.

The encoder 52 is assembled on the shaft section 12 to match the preset position of the encoder disk 51 .

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

Please refer to FIGS. 1 to 3 , when the electric drive mechanism 40 is activated, the outer rotor 411 of the outer rotor motor 41 rotates, so that the extension section 411A pulls the transmission member 32 of the hydraulic pulse mechanism 30 to act, so that the hydraulic pulse The pulse torque generated by the mechanism 30 is output by the drive shaft 31 .

When the transmission member 32 of the hydraulic pulse mechanism 30 is pulled and acted by the electric drive mechanism 40, the encoder disk 51 assembled on the transmission member 32 also rotates synchronously to match the encoding The sensing of the device 52 is used to obtain the rotational speed, angle, etc. of the transmission element 32 , and then the operation information of the drive shaft 31 of the hydraulic pulse mechanism 30 can be calculated.

The above descriptions are only preferred embodiments of the present invention, and are intended to clarify the characteristics of the present invention, but not to limit the scope of the embodiments of the present invention. Those skilled in the art can make equal 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 segment

13: Rear end cover

31: Drive shaft

42: heat sink

43: Fan

A1: Gun Grip

Claims (8)

An electric tool transmission and rotation angle detection structure, comprising: a casing, comprising a front end cover, a shaft section and a rear end cover serially connected in sequence; The shaft body section has a set of connection chambers, a bearing chamber, a connection hole and an electric drive chamber in sequence in the inner concentric communication; One end of the front end cover is assembled with the assembly chamber; The rear end cover is assembled at one end of the shaft body section to partially restrict the cross section of the open end of the electric drive chamber; A bearing, which is housed in the bearing chamber; an oil pressure pulse mechanism, which penetrates and is accommodated in the front end cover, and has a drive shaft and a transmission member protruding from opposite ends of the front end cover; an electric drive mechanism, which is connected with the transmission member, and includes 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 with the transmission member after passing through the inner ring side of the bearing; a tightening nut screwed to the extension against the bearing; and An encoding mechanism includes a set of encoder discs arranged on the outer peripheral side of the transmission element, and a set of encoders arranged on the shaft section to match the encoder disc. The electric tool transmission and rotation angle detection structure according to claim 1, wherein one end of the housing is assembled with a gun-shaped handle. The electric tool transmission and rotation angle detection structure according to claim 1, wherein one end of the housing is assembled with a cylindrical handle. The electric tool transmission and rotation angle detection structure according to claim 1, wherein the electric drive chamber and the bearing chamber are separated by a partition. The electric tool transmission and rotation angle detection structure according to claim 1, wherein between the assembly chamber and the electric drive chamber, further includes a plurality of heat dissipation holes that pass through the shaft body section to form communication. The electric tool transmission and rotation angle detection structure according to claim 1, wherein the shaft body further comprises a C-buckle groove formed on the wall of the bearing chamber, providing a C-buckle to be inserted and pressed against the bearing outer ring. The electric tool transmission and rotation angle detection structure of 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 according to claim 7, wherein the electric drive mechanism includes a fan assembled with a corresponding heat sink.

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