CN217776902U - Working machine - Google Patents
Working machine Download PDFInfo
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- CN217776902U CN217776902U CN202221607961.5U CN202221607961U CN217776902U CN 217776902 U CN217776902 U CN 217776902U CN 202221607961 U CN202221607961 U CN 202221607961U CN 217776902 U CN217776902 U CN 217776902U
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- Prior art keywords
- motor
- sensor substrate
- housing
- case
- work machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Working Implements (AREA)
- Agricultural Machines (AREA)
- Portable Power Tools In General (AREA)
Abstract
The utility model provides a compact operation machine. The work machine has a motor (3) and a gear case (5), wherein the gear case (5) has an opening at the rear end, and a motor spacer (80) is connected to the opening. The motor spacer (80) has a recess (81) on the rear surface. The sensor substrate (90) is positioned by the concave portion (81), and the sensor substrate (90) is connected to the concave portion (81). The sensor substrate (90) detects the rotation state of the motor (3). The sensor substrate (90) and the gear case (5) are overlapped in the front-rear direction position.
Description
Technical Field
The utility model relates to a working machine.
Background
Patent document 1 discloses an electric power tool in which a base plate is disposed in a motor housing.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2015-180523
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
In a working machine such as an electric power tool, improvement in workability due to compactness is sought.
An object of the utility model is to provide a compact workover rig.
Means for solving the problems
The utility model, scheme 1, is an operating machine, which is characterized in that,
the motor drive device is provided with a motor and a gear box, and at least a part of a sensor substrate for detecting the rotation state of the motor or at least a part of an element mounted on the sensor substrate is positioned inside the gear box in the axial direction of the motor.
The work machine according to claim 1 of claim 2 is characterized in that the gear case has a motor-side opening, a cover is connected to the motor-side opening, and at least a part of the sensor substrate or at least a part of the element overlaps the cover.
The working machine according to claim 5 or 4, wherein the cover has a bearing holding portion for holding a bearing, and the recess is located radially outward of the bearing holding portion.
The work machine according to claim 8 or 3, wherein a fan for generating cooling air is provided, the gear box is disposed in front of the motor, and the fan is disposed behind the motor.
In addition, any combination of the above-described constituent elements and a change in the expression form of the present invention between a method, a system, and the like are also effective as the aspect of the present invention.
Effect of the utility model
According to the utility model discloses, can provide compact operation machine.
Drawings
Fig. 1 is a right side view of work machine 1 according to embodiment 1 of the present invention.
Fig. 2 (a) is a right side sectional view of a part of work implement 1, and fig. 2 (B) is an explanatory diagram of the arrangement of control board 20 of work implement 1.
Fig. 3 is a partially enlarged view of fig. 2 (a).
Fig. 4 is a partially enlarged right sectional view of the working machine according to embodiment 2 of the present invention.
Fig. 5 is a cross-sectional view C-C of fig. 4.
Fig. 6 is a partial rear perspective view of the working machine according to embodiment 2 with the right portion of the housing removed.
Fig. 7 is a right side view in the state of fig. 6.
Fig. 8 is a rear perspective view of fig. 6 with the housing 2, the motor 3, and the like removed.
Fig. 9 is a right side view in the state of fig. 8.
Fig. 10 is a rear perspective view of the working machine in the same state as fig. 8, as viewed from a different point of view from fig. 8.
Fig. 11 is a right side view of work implement 101 according to embodiment 3 of the present invention.
Fig. 12 is a partial right side sectional view of work implement 101.
Fig. 13 is a partially enlarged view of fig. 12.
In the figure:
1-working machine, 2-housing, 2 a-motor housing (body part), 2 b-handle housing (handle part), 2 c-battery housing (battery loading/unloading part), 2 j-air inlet, 3-motor, 3 a-output shaft, 3 b-rotor set, 3 c-stator set, 4-speed reduction mechanism, 5-gear box (front housing), 6-trigger switch, 7-battery set, 8-motor spacer (cover), 9-sensor substrate, 10-clutch knob, 11-sleeve, 12-tail cover, 12 a-exhaust port, 13-rear bearing, 14-front bearing, 15A-insulator, 16-screw, 17-fan, 18-element, 19-rear housing, 20-control substrate, 23-chuck part, 80-motor spacer (cover), 81-recess, 82-bearing holder, 90-sensor substrate, 91-heat-staked part (joint), 101-work machine, 102-housing, 102 a-motor housing (body), 102 b-handle housing (handle), 102 c-battery housing (battery splay), 103-motor, 103 a-output shaft, 104-speed reduction mechanism, 105-gear box, 106-trigger switch, 107-battery pack, 112-tail cover, 113-rear bearing, 114-front bearing, 117-fan, 125-rotary striking mechanism, 180-motor spacer (cover), 190-sensor substrate.
Detailed Description
Hereinafter, the same or equivalent constituent elements, members, and the like shown in the respective drawings are denoted by the same reference numerals, and overlapping description thereof will be omitted as appropriate. The embodiments are not intended to limit the invention but to exemplify it. All features described in the embodiments and combinations thereof are not necessarily essential parts of the invention.
(embodiment mode 1)
Fig. 1 to 3 relate to a work machine 1 according to embodiment 1 of the present invention. The front-back and vertical directions of the work machine 1 orthogonal to each other are defined according to fig. 1. The direction perpendicular to the front-back and up-down directions is defined as the left-right direction. The front-rear direction is a direction parallel to the axial direction of the motor 3. The work machine 1 is an electric drill. The work machine 1 includes a housing 2.
The housing 2 includes a motor housing (main body portion) 2a, a handle housing (handle portion) 2b, and a battery housing (battery attachment/detachment portion) 2c. The motor case 2a, the handle case 2b, and the battery case 2c are resin molded bodies having a left-right halved structure.
The motor case 2a is a cylindrical portion having a central axis substantially parallel to the front-rear direction. Air inlets 2j are provided on both left and right side surfaces of the motor case 2a, respectively. A clutch knob 10, a sleeve 11, and a chuck section 23 are provided in front of the motor housing 2a. Chuck unit 23 holds a tip tool such as a drill not shown.
The housing 2 has a tail cover 12 covering the rear end opening of the motor housing 2a. The tail cover 12 is formed of a single resin molded body. Exhaust ports 12a are provided on both right and left sides of the tail cover 12. The exhaust port 12a may be a local gap with the motor housing 2a.
One end (upper end) of the handle case 2b is connected to a middle portion of the motor case 2a in the front-rear direction, and extends downward from the middle portion. A trigger switch (operation switch) 6 for switching between driving and stopping of the motor 3 by a user is provided at an upper end portion of the handle case 2 b.
The battery case 2c is provided at the other end (lower end) of the handle case 2b, and the battery pack 7 is detachably attached. Work implement 1 operates using the electric power of battery pack 7. As shown in fig. 2 (B), the work machine 1 includes a control board 20 inside a battery case 2c.
As shown in fig. 2a, the work machine 1 includes a motor 3, a reduction mechanism 4, a gear case (front case) 5, a motor spacer 8, a sensor substrate 9, and a fan 17 inside a motor case 2a and a tail cover 12.
The motor 3 is an inner rotor type brushless motor, and as shown in fig. 3, includes a rotor group 3b and a stator group 3c. The energization of the motor 3 is controlled by a controller (microcomputer), a switching element (inverter circuit), and the like provided on the control board 20 shown in fig. 2B.
The speed reduction mechanism 4 is held in the gear case 5 in front of the motor 3, and reduces the rotation of the motor 3 and transmits the rotation to the chuck section 23. The gear case 5 is made of, for example, metal and has a cylindrical shape with an open rear end. A rear housing 19 is provided inside the rear portion of the gear case 5.
As shown in fig. 3, the fan 17 is directly coupled to the rear portion of the output shaft 3a of the motor 3 and is located inside the tail cover 12. The fan 17 is a centrifugal fan driven by the motor 3, and generates cooling air for cooling the motor 3 and the like.
By the rotation of the fan 17, the air outside the housing 2 is taken (sucked) into the motor housing 2a from the air inlet 2j on the side surface of the motor housing 2a, flows backward while cooling the motor 3, is sucked into the fan 17, flows in the centrifugal direction, and is discharged (discharged) from the air outlet 12a.
The output shaft 3a of the motor 3 is parallel to the front-rear direction. The rear portion of the output shaft 3a is rotatably supported by a rear bearing 13. The rear bearing 13 is held by the tail cover 12. The front portion of the output shaft 3a is rotatably supported by the front bearing 14. The front bearing 14 is held by the motor spacer 8.
The motor spacer 8 is a cover body that is connected to and closes a rear end opening (motor side opening) of the gear case 5. The motor spacer 8 is, for example, a resin molded body, and is fixed to the rear end portion of the gear case 5 by, for example, rotational fitting. The rotational fitting is a fitting in the rotational direction by rotating the motor spacer 8 in a state of being aligned with the gear case 5. The positions of the gear case 5 and the motor spacer 8 in the front-rear direction at least partially overlap.
The sensor substrate 9 is a substrate for detecting the rotational position of the rotor group 3b (detecting the rotational state of the motor 3), and a magnetic sensor such as a hall IC (not shown) is mounted on the back surface (rear surface). The sensor substrate 9 is fixed to an insulating insulator 15 of the stator group 3c by a screw 16. The sensor substrate 9 is located between the rotor group 3b and the stator group 3c and the motor spacer 8. The sensor substrate 9 needs to be separated from the rotor group 3b by a certain distance or more in the front-rear direction.
An element 18 such as a resistor element provided on the front surface of the sensor substrate 9, a solder not shown, and the front-rear direction position of the head of the screw 16 overlap the rear portion of the gear case 5 and the motor spacer 8. The sensor substrate 9 and the motor spacer 8 overlap at least partially in the front-rear direction position. The sensor board 9 and the front bearing 14 overlap at least partially in the front-rear direction.
According to the present embodiment, the following effects can be obtained.
(1) Since the front-rear direction positions of the element 18, solder not shown, and the head of the screw 16 provided on the front surface of the sensor substrate 9 overlap the rear portion of the gear case 5 and the motor spacer 8, the front-rear direction dimension of the motor case 2a can be reduced as compared with the case where they do not overlap, and a compact working machine 1 can be realized.
(2) Since the positions of the gear case 5 and the motor spacer 8 in the front-rear direction at least partially overlap each other, the size of the motor housing 2a in the front-rear direction can be reduced as compared with a case where the motor spacer 8 is located behind the gear case 5 without overlapping each other, and the compact working machine 1 can be realized.
(3) Since the positions of the sensor board 9 and the motor spacer 8 in the front-rear direction overlap at least partially, the size of the motor housing 2a in the front-rear direction can be reduced as compared with a case where the sensor board 9 is positioned behind the motor spacer 8 without overlapping, and a compact working machine 1 can be realized.
(4) Since the sensor board 9 and the front bearing 14 are at least partially overlapped in the front-rear direction position, the size of the motor housing 2a in the front-rear direction can be reduced as compared with a case where the sensor board 9 is positioned behind the front bearing 14 without being overlapped, and a compact working machine 1 can be realized.
(embodiment mode 2)
Fig. 4 to 10 relate to a working machine according to embodiment 2 of the present invention. The main difference from embodiment 1 is that the motor spacer 8 is replaced with a motor spacer 80, and the sensor substrate 9 is replaced with a sensor substrate 90.
The motor spacer 80 is, for example, a resin molded body, and is a cover body that is connected to and closes a rear end opening (motor side opening) of the gear case 5. The motor spacer 80 is fixed to the rear end portion of the gear case 5 by, for example, rotational fitting. The positions of the gear case 5 and the motor spacer 80 in the front-rear direction at least partially overlap. The motor spacer 80 has a bearing holding portion 82 for holding the front bearing 14 at a center portion on the rear surface side. The motor spacer 80 has a recess 81 on the back surface. The recess 81 is located radially outward of the bearing holding portion 82.
The sensor substrate 90 is a substrate having a magnetic sensor such as a hall IC mounted on the back surface thereof for detecting the rotational position of the rotor group 3 b. The sensor substrate 90 is positioned in the concave portion 81 and positioned by the concave portion 81. The sensor substrate 90 is fixedly attached (fixed) to the concave portion 81 by, for example, heat caulking (thermal fusion bonding) instead of screws. The heat caulking portion (joint portion) 91 is a joint portion of the sensor substrate 90 with respect to the motor spacer 80. The sensor substrate 90 may be fixed to the motor spacer 80 by rotation fitting, bonding, or screw fixing.
The thickness of the sensor substrate 90 is within the depth of the recess 81, and the sensor substrate 90 does not protrude rearward from the opening of the recess 81. That is, the sensor substrate 90 is housed within the presence range of the motor spacer 80 in the front-rear direction. The sensor substrate 90 and the gear case 5 overlap at least partially in the front-rear direction position. The sensor substrate 90 and the front bearing 14 overlap at least partially in the front-rear direction.
The insulator 15A corresponds to the insulator 15 of embodiment 1, but unlike the insulator 15, there is no need to fix the sensor substrate, and therefore, there are no extension portion, screw seat, and the like for fixing the sensor substrate, and the structure is simple.
As shown in fig. 8, the assembly steps are as follows: a flow of preparing a set of the motor spacer 80, the gear case 5, and internal components (such as the reduction mechanism 4) thereof to which the front bearing 14 and the sensor substrate 90 are fixed, and pressing the output shaft 3a of the motor 3 into the front bearing 14.
Other points of this embodiment are the same as those of embodiment 1.
According to the present embodiment, since the sensor substrate 90 is disposed in the recess 81 of the motor spacer 80, the sensor substrate 90 is disposed further forward than the sensor substrate 9 of embodiment 1. Therefore, the motor 3 can be positioned forward, and the size of the motor housing 2a in the front-rear direction can be further reduced as compared with embodiment 1, thereby realizing a compact working machine.
Further, since the sensor substrate 90 is positioned by the concave portion 81, positioning and mounting of the sensor substrate 90 are easier than in the case where the sensor substrate 90 is screwed to the insulator 15A, and also downsizing of the insulator 15A and thus downsizing of the motor case 2a can be achieved.
(embodiment mode 3)
Fig. 11 to 13 relate to a work machine 101 according to embodiment 3 of the present invention. The front-back and vertical directions orthogonal to each other in the working machine 101 are defined according to fig. 11. The direction perpendicular to the front-rear and up-down directions is defined as the left-right direction. Work implement 101 is an impact driver. Work implement 101 includes a housing 102.
The housing 102 includes a motor housing (main body portion) 102a, a handle housing (handle portion) 102b, and a battery housing (battery attachment/detachment portion) 102c. The motor case 102a, the handle case 102b, and the battery case 102c are resin molded bodies having a left-right halved structure.
The motor housing 102a is a cylindrical portion having a central axis substantially parallel to the front-rear direction. A tool bit such as a drill, not shown, is held at the front end of the motor housing 102 a. The housing 102 has a tail cover 112 covering the rear end opening of the motor housing 102 a. The tail cover 112 is formed of a single resin molded body.
One end (upper end) of the handle case 102b is connected to a middle portion of the motor case 102a in the front-rear direction, and extends downward from the middle portion. A trigger switch (operation switch) 106 for switching the driving and stopping of the motor 103 by a user is provided at an upper end portion of the handle case 102 b.
The battery case 102c is provided at the other end (lower end) of the handle case 102b, and the battery pack 107 is detachably mounted. Work implement 101 operates using the power of battery pack 107.
As shown in fig. 12, the working machine 101 includes a motor 103, a reduction mechanism 104, a gear box (front housing) 105, a rotary striking mechanism 125, a rear housing 180, a sensor board 190, and a fan 117 inside a motor case 102a and a tail cover 112.
The motor 103 is an inner rotor type brushless motor. The reduction mechanism 104 is held in the gear box 105 in front of the motor 103, and reduces the rotation of the motor 103 and transmits the reduced rotation to the rotary striking mechanism 125. The rotary striking mechanism 125 applies a rotary striking force to a tip tool not shown. The gear case 105 is made of, for example, metal and has a cylindrical shape with an open rear end.
The output shaft 103a of the motor 103 is parallel to the front-rear direction. The rear portion of the output shaft 103a is rotatably supported by a rear bearing 113. The rear bearing 113 is held by the tail cover 112. The front portion of the output shaft 103a is rotatably supported by a front bearing 114. The front bearing 114 is held to the rear housing 180.
The rear case 180 is a cover body that is connected to and closes a rear end opening (motor-side opening) of the gear case 105. The rear housing 180 is, for example, a resin molded body, and is fixed to the rear end portion of the gear case 105 by, for example, rotational fitting. The gear case 105 and the rear housing 180 overlap at least partially in the front-rear direction.
The rear case 180 has a recess 181 on the rear surface. The recess 181 is located radially outward of the front bearing 114. The sensor substrate 190 is located in the recess 181 and positioned by the recess 181. The sensor substrate 190 is bonded (fixed) to the rear case 180 by, for example, heat caulking. The sensor substrate 190 may be fixed to the rear case 180 by rotation fitting, adhesion, or screw fixing.
The thickness of the sensor substrate 190 is within the depth of the recess 181, and the sensor substrate 190 does not protrude rearward from the opening of the recess 181. That is, the sensor substrate 190 is housed within the existence range of the rear case 180 in the front-rear direction. The sensor board 190 and the front bearing 114 overlap at least partially in the front-rear direction.
According to the present embodiment, as in embodiment 2, a compact working machine can be realized.
While the present invention has been described with reference to the embodiments, it will be understood by those skilled in the art that various modifications may be made to the components and processes of the embodiments within the scope of the claims.
Claims (8)
1. A working machine is characterized in that a working machine body,
the device is provided with a motor and a gear box,
at least a part of a sensor substrate that detects a rotation state of the motor or at least a part of an element mounted on the sensor substrate is located inside the gear case in an axial direction of the motor.
2. The work machine of claim 1,
the gear case has a motor-side opening,
a cover body is connected to the motor side opening,
at least a portion of the sensor substrate or at least a portion of the element overlaps the cover.
3. The work machine of claim 2,
the sensor substrate is connected to the cover.
4. The work machine according to claim 2 or 3,
the cover body is provided with a concave portion for connecting the sensor substrate.
5. The work machine of claim 4,
the cover body has a bearing holding portion that holds a bearing,
the recess is located radially outward of the bearing holding portion.
6. The work machine according to claim 2 or 3,
the sensor substrate is not fixedly connected to the cover body through screws.
7. The work machine according to claim 2 or 3,
the sensor substrate is positioned by the cover.
8. The work machine according to claim 2 or 3,
has a fan for generating cooling air, and a fan for generating cooling air,
the gear box is arranged in front of the motor,
the fan is disposed behind the motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021104307A JP2023003239A (en) | 2021-06-23 | 2021-06-23 | work machine |
| JP2021-104307 | 2021-06-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217776902U true CN217776902U (en) | 2022-11-11 |
Family
ID=81847698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221607961.5U Active CN217776902U (en) | 2021-06-23 | 2022-06-23 | Working machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2023003239A (en) |
| CN (1) | CN217776902U (en) |
| DE (1) | DE202022102419U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022126733A1 (en) | 2022-10-13 | 2024-04-18 | Zf Cv Systems Europe Bv | Equipment arrangement with a working machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6029036B2 (en) | 2015-06-08 | 2016-11-24 | 日立工機株式会社 | Electric tool |
-
2021
- 2021-06-23 JP JP2021104307A patent/JP2023003239A/en active Pending
-
2022
- 2022-05-04 DE DE202022102419.7U patent/DE202022102419U1/en active Active
- 2022-06-23 CN CN202221607961.5U patent/CN217776902U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023003239A (en) | 2023-01-11 |
| DE202022102419U1 (en) | 2022-05-12 |
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