JP2019080460A - Casing structure of linear driving device - Google Patents

Abstract

To make it possible to easily in short time perform connection work with a wiring board 82 with respect to a lower terminal tip 611 which is provided in parallel with a motor connection pin 11b on a lower surface portion by manufacturing a terminal block 6 having a connection terminal 61 which can be easily set in a terminal block mounting unit 31a as a separate member, and by penetrating an upper terminal tip 612 in a state where a bottom of a connector connecting concave groove 412 of a rubber base plate 41 is brought in pressure contact with an upper surface of the terminal block 6.SOLUTION: A terminal block mounting unit 31a is provided with respect to an opening 3a formed in a gear case 3. A terminal block 6 is formed by making a lower terminal tip 611 to protrude in the same direction as a motor connection pin 11b on a lower surface side of the terminal block and by making an upper terminal tip 612 which penetrates into a connector connecting concave portion 412 to protrude on an upper surface side of the terminal block. With respect to the set terminal block 6, a wiring board 82 is configured to be attachable to the motor connection pin 11b and the lower terminal tip 611 from the opening 3a side.SELECTED DRAWING: Figure 3

Description

  According to the present invention, there is provided a linear motion drive comprising: a gear case in which a motor and a reduction gear means are accommodated; a cylindrical lid-like outer case fitted to the gear case; and a base plate attached with a bearing housing closing an opening side thereof. It relates to the casing structure of the device.

  Generally, in this type of linear motion drive device, a gear case is fitted in a state in which a support shaft of a gear is vertically supported on each shaft hole formed on the back surface of a base plate, and a motor is mounted on this gear case After setting the outer case, it is manufactured by an assembly process. In addition, when assembling the outer case, the connection work of drawing out the motor connection pin protruding from the outer peripheral surface of the motor case to the outside is performed in advance. One in which a plug-in connection is made after assembling a case (see Patent Document 1 and FIG. 1) and one in which a plug-in connection is performed before assembling an outer case (see Patent Document 2 and FIG. 3) It has been known.

  That is, in these motor connection pins, a wire connection hole formed by cutting out a part of the motor case is opened on the outer peripheral surface of the motor case of the motor, and the wire connection terminal of the exciting coil is connected via this wire connection hole. In the motor connection pin, the feeder of Patent Document 1 is provided with a feed line (303) through a wide space area formed on the peripheral surface portion having the connection hole. In the case of Patent Document 2, by directly connecting the wiring substrate (92), the lead wire (9) is drawn out by extending the wire and connecting the tip of the wire.

  However, in the case of Patent Document 1, the molding member (11) (gear case) is attached to the ground plate in advance, and a plurality of elongated extension feeder pins (303) (connection terminals) are prepared. The base end of the rubber hole extending portion (1021) in which the lead-out hole is drilled is connected to the motor connection pin in a state in which the tip end is inserted into each insertion hole drilled in the molding member (11). Until it comes to a position where it comes into contact with the air tight, it is set while penetrating operation and wiring work such as soldering is performed, so the penetration of the feeder pin (303) to the rubber hole extension (1021) becomes tight Not only the wire connection pin (303) is hard to connect because the wire pin (303) is bent, the yield is low, the work efficiency for assembling is poor, and the assembling time is also long. The protruding length and alignment of the tips of the feed line pins (303) arranged inside are not uniform, and it takes time and effort to correct the alignment when inserting and setting the connector (105). Has problems such as bending and correction of bending, etc., and the working efficiency required for the whole set operation is also poor. The rubber hole extending portion (1021) is formed on the inner periphery of the molding member (11) Since the set groove is formed, the outer diameter is increased, which has been an obstacle to compactness.

On the other hand, in the case of Patent Document 2, an opening for connecting the gear housing (31) and the motor housing (32) in a substantially C-shape in cross section as a circular arc surface of an arbitrary width of the gear case (3). In the previous step of forming (321) and housing the gear case (3) in the outer case (2), the connection pin (11b) of the motor is penetrated through the concave bush (6) to cover the opening outer peripheral surface of the motor The wiring board (92) is connected to the wire connection pin (11b) protruding from the concave bush (6), and the female connector (91) is connected to this, and then the male connector (91) of the lead wire (9) is made in advance. Although it has an advantage of being able to perform wiring work relatively easily because it is configured to be inserted and mounted in advance, the liquid sealing agent (7) must always flow into the opening (321) where the connector (91) is disposed. Connection of the motor (11b) A member to be protected by the concave bush (6) is required to avoid the influence on the part, and the number of parts and the number of operation man-hours caused by the liquid sealing agent (7) filling increase, which causes cost increase. In addition, when used for products that do not necessarily require a high degree of sealing performance, the quality is excessive and it is an obstacle to weight reduction.

Unexamined-Japanese-Patent No. 2003-97660 JP, 2014-180184, A

The present invention was conceived to clear up the problems as described above, and is a linear motion drive device of the type in which a connector of a lead wire for supplying power to a motor is inserted and connected after an outer case is assembled. The terminal block on which the connection terminals are arranged is manufactured as a separate member, and can be easily set in advance to the terminal block mounting portion of the gear case in advance before assembling the base plate and the gear case. Assemble the base plate by pushing the upper terminal tip portion projecting from the upper surface of the terminal block all at once through the terminal insertion hole formed in the bottom surface while guiding the groove to the peripheral surface of the opening of the gear case In addition, it is possible to set the wiring board simply with one push on the motor connection pin and the lower terminal end that is juxtaposed in the same direction and protrudes in the same direction. Therefore, it is possible to perform the connection work of the two in a very easy and short time, and the number of parts is reduced and the structure is simplified, so that the efficiency of the assembly work and the cost reduction can be achieved. It aims to provide a casing structure.

The technical means adopted by the present invention in order to solve the above problems is a gear case in which a motor and reduction gear means for transmitting the rotation are accommodated in a cylindrical lid-like outer case, and an opening side of the outer case A base plate for mounting a bearing housing containing a linear motion shaft interlocked with the reduction gear means and capable of advancing and retreating movement, and a motor closely attached to the base plate and embedded in a gear case A linear motion drive device comprising: a rubber base plate having a connector connection concave groove portion for connecting a lead wire for power supply, wherein the gear case has a gear accommodating portion in which reduction gear means is disposed on the upper side; The lower side has a motor accommodating portion in which a motor is disposed, and an arc surface having an arbitrary width is communicated and opened to form an opening, and the opening serving as the gear accommodating portion is used for connecting the connector. Concave groove and its A terminal block mounting portion for arranging a terminal block for connecting the lead wire and the motor connection pin is formed between the motor connection pin projecting from the outer peripheral surface of the motor case in the opposite position, and the terminal block is A lower terminal end of the lower terminal protruding in the same direction as the motor connection pin is juxtaposed on the lower surface side, and a connection is provided on the upper surface side with an upper terminal front end portion projectably inserted into the connector connecting recessed groove. In the state where terminals are provided and the terminal block is set to the terminal block mounting portion, the motor connection pin and the lower terminal tip portion protruding into the opening are connected by connecting the wiring board from the outer peripheral side of the gear case It is characterized in that it is configured as possible.

In the casing structure of the linear drive in the present invention, the connection terminal is disposed while the linear drive of the type in which the connector of the lead wire for supplying power to the motor is inserted and connected after the outer case is assembled. The terminal block is manufactured as a separate member, and it can be easily set to the terminal block mounting part formed in advance in the opening of the gear case in the pre-process of assembling the ground plate and the gear case. The base plate is assembled by collectively pushing through the tip of the upper terminal projecting from the upper surface of the terminal block into the terminal insertion hole formed in the bottom while guiding the peripheral surface of the concave groove to be a part. In addition, the motor connection pin and the lower terminal tip end portion juxtaposed in the same direction in the opening portion protrude in the opening portion before the outer case is assembled. With a simple set-up operation that only requires mounting, connection work between the two can be performed extremely easily and in a short time, and the number of parts is reduced and the structure is simplified, thereby improving the efficiency and cost of assembly work. Not only can the lead wire be assembled, but the connector can be connected simply by inserting the connector without deforming the terminal with respect to the tip of the upper terminal, which is disposed in an orderly protruding manner in the concave groove for connector connection. Wire connection can be made, and moreover, the upper surface of the terminal block functions as a contact receiving surface against the bottom surface of the concave portion for connector connection, and the connector is press-inserted against the bottom against the rubber spring. Can be attached in a state in which adhesion is maintained, a simple sealing structure can be constructed, and for applications where a high degree of sealing performance is not necessarily required. Can be adopted remain.

It is a side view of a linear motion drive which shows an embodiment of the present invention. It is a whole longitudinal cross-sectional view which shows the casing structure of the linear-motion drive which shows embodiment of this invention. It is assembly disassembled explanatory drawing of a linear-motion drive device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A linear motion device will now be described in detail based on the drawings, illustrating an embodiment of the present invention as a preferred embodiment.
FIG. 1 is a plan view of the linear drive, and FIG. 2 is an overall sectional view showing a casing structure of the linear drive. As shown in these figures, 1 is a linear motion drive device, and the linear motion drive device 1 includes a cylindrical lid-shaped outer case 2, a PM type (permanent magnet type) stepping motor or the like in the outer case 2. A gear case 3 in which a motor 11 such as a DC motor and a reduction gear means 12 for transmitting the rotation are accommodated, and a rubber base plate 41 provided on the opening side of the outer case 2 and in close contact with the upper surface thereof by an adhesive or the like. And a bearing housing 5 in which a forward / backward movable linear motion shaft 51 attached to the ground plate 4 is accommodated. Although various known motors such as a DC motor and a BLDC motor can be adopted as the motor 11, in this embodiment, a PM type (permanent magnet type) stepping motor which can be open loop controlled and advantageous in cost is used. It is adopted.

  The motor 11 includes a cylindrical motor case 113 as a yoke including a pair of coil bobbins 111 and an excitation coil 112, a rotor 114 rotatably disposed on the inner peripheral side of the motor case 113, and a center of the motor 11. And a motor shaft 115, which is installed upright on the flange 116 by means of a locking and fixing mechanism, and supports the rotor 114 by axial insertion. The rotor 114 has air space portions 114a... Internally divided by three rib legs for weight reduction, and the rotation transmission of the rotor 114 is transmitted to the reduction gear means 12 at the center upper side thereof It has a concave portion 114 b for arranging the transmission gear 13. The motor connection pin 11b is connected on the outer peripheral surface of the motor case 113 so as to draw out the winding end of the exciting coil 112 to the outside from the connection hole 11a formed by cutting out a part of the motor case 113 to the outside of the case. It is set up to face.

  The transmission gear 13 is inserted into the three airspaces 114a from above while holding the support leg 131 in a detent state, and the teeth meshed with the reduction gear means 12 by immersing in the upper side of the support leg 131 It has a portion 132 and is formed in a convex shape in a side view, and is attached by axially inserting the center thereof into the motor shaft 115. In addition, on the circumferential upper surface of the support leg 131, in the set state, it slightly protrudes from the upper surface of the rotor 114, and a clearance slightly opposed to the bottom surface of the gear accommodating portion 31 (support receiving portion 33) described later. The sliding contact protrusion 131a which carries out an interview by holding is integrally formed, and the vertical movement of the transmission gear 13 at the time of rotational driving is restricted.

  The outer case 2 has a cylindrical lid shape having a U-shaped cross section by the base plate support portion 21 and the bottom surface portion 22 and is provided on the outer periphery for setting the base plate 4 to be installed together with the gear case 3 at the tip end of the opening side. It is formed to have a base plate supporting portion 21 which protrudes in a step-like shape and extends upward beyond the rubber base plate 41. The front end edge is bent inward by about 45 ° by caulking in a state of being pressed by the inner peripheral surface of the base plate supporting portion 21 and the upper outer peripheral surface of the rubber base plate 41 to form the inclined peripheral portion 21a. The main plate 4 is configured to be prevented and sealed by the elastic pressure of the rubber main plate 41. In addition, a disc-shaped rubber sheet 7 of the inner peripheral cylinder diameter is laid on the bottom surface portion 22 in the outer case 2.

The gear case 3 is integrally formed in a cylindrical shape by a resin material. The resin material may be selected arbitrarily, but in the present embodiment, a glass fiber reinforced resin having high strength is employed. The gear case 3 is integrally formed with a gear accommodating portion 31 in which a reduction gear means 12 consisting of a reduction gear mechanism in which a predetermined number of gears are arbitrarily combined is disposed, and a motor accommodating portion 32 in which the motor 11 is disposed. And the inner cylindrical region is opened more eccentrically than its central position. In addition to a configuration in which a predetermined number of spur gears are combined as in this embodiment, a wave gear mechanism and a planetary gear mechanism can be used depending on applications.
Furthermore, the base end portion of the linear movement shaft 51 and each gear shaft are rotatably supported inside the gear case 3, and the upper surface and peripheral edge of the motor 11 (motor case 113) are received and supported, and a transmission gear A support receiving portion 33 in which a concave set groove adapted to these shapes is engraved is formed so as to receive and slide in contact with the 13 sliding projections 131a.

The motor housing portion 32 is assembled and held in a state in which the outer peripheral surface of the motor case 113 is firmly interviewed and supported when the motor 11 is inserted and inserted by the four arc-shaped support legs 321. It is configured to
In the outer peripheral surface portion of the gear case 3, an arc surface having an arbitrary width is opened on the thick cylinder side of the eccentric opening cylinder, and a concave groove portion 311 having a concave shape in top view is formed in the gear housing portion 31. In a mode in which the support legs 321 of the motor housing portion 32 are disposed on both sides, an opening 3a including the gear case 3 and the base plate 4 is communicated in a substantially C shape in cross section as a whole. The connection hole 11a of the motor case 113 and the motor connection pin 11b are disposed in the opening 3a formed therebetween. Furthermore, in the lower region of the recessed groove portion 311 to be the opening 3a, a recessed terminal block mounting portion 31a for disposing the terminal block 6 is formed.

  The rubber base plate 41 is formed in a disk shape having an outer diameter slightly larger than the circumferential surface of the base plate 4 and having convex ribs 411 at the upper circumferential edge thereof, and is bonded onto the base plate 4 It adheres with materials etc. Further, at a portion to be the recessed groove portion 311 of the gear housing portion 31, the connector 81 of the lead wire 8 for supplying power to the motor 11 of a depth width reaching the terminal block 6 in a state of being embedded in the opening 3a serving as the inside thereof. A connector connecting concave portion 412 having a concave shape in cross section for inserting and connecting is formed. The outer peripheral surface of the connector connecting recessed groove portion 412 is formed by an arc surface having the same diameter as the outer diameter of the rubber base plate 41, while the outer peripheral surface is formed so as to slightly bulge out from the inner peripheral diameter of the outer case 2 As a result, the gear case 3 and the inner peripheral surface of the outer case 2 are brought into contact with the clutch so as to be inserted and temporarily assembled in a state in which the retainer is restricted. Further, an insertion hole for inserting an upper terminal tip end portion 612 of the connection terminal 61 described later is formed in the bottom surface portion of the connector connecting recessed groove portion 412.

  The bearing housing 5 has a step shape that can be attached to a mounting hole formed on the base plate 4 at the base end side, and has a mounting portion 5a for attachment to a work on the tip side where the linear motion shaft 51 protrudes and retracts, The entire body is formed of a brass material in a cylindrical shape, and the tip portion (valve body) of the linear motion shaft 51 is disposed in the valve chamber of fluid piping such as gas or liquid, and the flow hole is opened by opening the flow hole in the valve chamber. It is applied to the device to control. In the bearing housing 5, a linear motion shaft 51 having a non-circular cylindrical female screw portion 511 of which a part is arc-shaped D-cut in the outer peripheral portion, and a fitting tolerance corresponding thereto are shown. A feed screw mechanism including a bearing member 52 slidably guiding 51 and a rotary shaft 53 as a male screw which is interlocked with the rotation of the reduction gear means 12 and screwed into the female screw portion 511 is provided. As a result, the linear movement shaft 51 moves forward and backward from within the bearing housing 5 together with the female screw portion 511 as the rotation shaft rotates. The other detailed configurations and functions of the feed screw mechanism are the same as those described in the published patent application filed by the applicant of the present application and disclosed in Patent Document 2, and thus the description thereof is omitted.

  Reference numeral 6 denotes a terminal block for connecting the lead wire 8 and the motor connection pin 11b, and the terminal block 6 is an arc surface on the tip side which contacts the inner peripheral surface of the outer case 2 as shown in FIG. And a downward L-shaped stepped portion to the connector connection concave groove 412 on the proximal end side, and the lower terminal distal end portion projecting in the same direction as the motor connection pin 11b on the lower surface side of the stepped portion An L-shaped bent connection terminal 61 is provided having an upper terminal tip end portion 612 which juxtaposes 611 and has an upper surface side which has an upper terminal tip portion 612 projectably inserted into the connector connection recessed groove portion 412. For connector connection formed between the bottom surface of the connector connection recessed groove 412 which is an independent member and is the opening 3a of the gear housing 31 and the motor connection pin 11b protruding from the outer peripheral surface of the motor case 113 Opening the base end side of the concave groove portion 412 It is mounted by inserting from an opening side of a.

  That is, when the terminal block 6 is mounted on the terminal block mounting portion 31a, the terminal block 6 serves as a partitioning member for partitioning between the openings 3a of the gear housing portion 31 and the motor housing portion 32. It can function as an abutment receiving surface for closely receiving and supporting the bottom of the connector connecting concave groove 412 inserted into 3a, and the motor connection pin 11b and the lower terminal project the wiring substrate 82 in the same direction. It is configured to be easily attached to the tip end portion 611 via the corresponding connection hole so that solder connection can be easily performed. Further, the portion where the lower terminal tip end portion 611 of the terminal block 6 protrudes is formed in a step-like shape so that the upper end surface of the wiring board 82 can be firmly brought into contact and positioned and attached.

Next, the assembly structure of the linear drive device will be described based on the exploded explanatory view shown in FIG. First, as a pre-process,
(1) The rubber sheet 7 is laid on the bottom portion 22 in the outer case 2 and the terminal block 6 is mounted on the terminal block mounting portion 31a.
(2) The rotor 114 is rotatably mounted on the motor 11, and the transmission gear 13 is inserted into the upper portion of the motor shaft 115.
(3) The base end side of the bearing housing 5 is inserted into the mounting hole of the base plate 4, and the step-like (ring-like) peripheral edge slightly protruding from the mounting hole is crimped and fixed in advance.
(4) The support shafts of the reduction gears constituting the reduction gear means 12 are erected in the respective shaft holes formed on the back surface of the base plate 4 and fixed to the reduction gears at the portion where the bearing housing 5 is mounted. After assembling and setting the rotary shaft 53 in a state of projecting from the base plate 4, the upper terminal tip portion 612 is penetrated through the insertion hole drilled in the bottom of the connector connecting concave groove 412. The gear accommodating portion 31 is fitted and mounted.
(5) The female screw portion 511 of the linear movement shaft 51 is screwed into the rotary shaft 53 as a male screw projecting inside the bearing housing 5 and is inserted and set in the bearing member 52.

As a process after assembling and setting these members,
(1) The outer case 2 is fitted on the gear case 3 after the wiring board 82 is inserted and set and soldered to the motor connection pin 11b and the lower terminal tip end portion 611 protruding in the same direction of the terminal block 6 Let
(2) The open-side end edge of the outer case 2 protruding from the base plate 4 (rubber base plate 41) is crimped inward to form the inclined peripheral edge 21a in a state in which the convex rib 411 of the rubber base plate 41 is elastically pressed Fix and seal 3 firmly.
(3) The assembly work is completed by inserting and mounting the connector 81 of the lead wire 8 into the upper terminal tip portion 612 which is penetrated into the connector connecting concave portion 412.

In the embodiment of the present invention configured as described above, the connector 81 of the lead wire 8 for supplying power to the motor 11 is inserted and connected after the outer case 2 is assembled. The casing structure of the linear drive 1 is
The gear case 3 is formed in a cylindrical shape with a gear accommodating portion 31 in which the reduction gear means 12 is disposed and a motor accommodating portion 32 in which the motor 11 is disposed, and an arc surface of an arbitrary width is communicated and opened. The gear case 3 itself is formed in a C-shape in top view with the opening 3a, and the connector connection concave groove 412 of the rubber base plate 41 is attached to the opening 3a. Furthermore, a lead wire is provided between the connector connecting recessed groove 412 and the motor connection pin 11b projecting from the outer peripheral surface of the motor case located opposite to the opening 3a (recessed groove 311) serving as the gear housing 31. A terminal block mounting portion 31a for arranging a terminal block 6 for connecting the motor connection pin 11b to the motor connection pin 11b is formed, and the terminal block 6 is a lower terminal projecting on the lower surface side in the same direction as the motor connection pin 11b. The terminal block 6 is provided with a connection terminal 61 having an upper terminal tip end portion 612 in which the tip end portion 611 is juxtaposed and which is projected on the upper surface side so as to be insertable into the connector connecting concave portion 412. With the motor connection pin 11b protruding into the opening 3a and the lower terminal tip end 611 set in the state 31a, the wiring board 82 is mounted from the outer peripheral side of the gear case 3 (opening side of the opening 3a) Shimete are then connected connectable to.

  According to this structure, the connection terminal 61 is disposed while the connector 81 of the lead wire 8 for supplying power to the motor 11 is a linear motion drive device of a type to be inserted and connected after the outer case 2 is assembled. Before the terminal board 6 is manufactured as a separate member and the base plate 4 and the gear case 3 are assembled, it can be easily set in the terminal block mounting portion 31a formed in the opening 3a of the gear case 3 in advance. While guiding the groove 412 to the peripheral surface of the recessed groove 311 to be the opening 3 a of the gear case 3, the upper terminal tip end protruding from the upper surface of the terminal block 6 with respect to the terminal insertion hole drilled in the bottom The base plate 4 can be assembled by pushing in through the package 612 at a time, and the lower terminal end of the motor connection pin 11 b in the opening 3 a is juxtaposed in the same direction and protrudes to the opening side In the process of housing the gear case 3 in the outer case 2 with respect to the case 611, the connection work of the two is performed extremely easily and in a short time by a simple setting operation in which the wiring substrate 82 is mounted by one push. As a result, the number of parts can be reduced and the structure can be simplified, and not only can the assembly work be made more efficient and cost reduction, but also the connection work of the lead wire 8 after assembly can be performed within the groove 412 for connector connection Can be connected simply by inserting and operating the connector 81 without deformation of the terminal with respect to the upper terminal end 612 which is disposed in an orderly manner, and the upper surface of the terminal block 6 is a concave for connecting the connector. The groove functions as a contact receiving surface against the bottom surface of the groove portion 412, and the connector 81 is press-inserted against the bottom surface against the rubber spring to maintain the adhesion. Ri that can be attached, it is possible to construct a simple sealing structure can be employed directly against necessarily high degree of sealing is not required applications.

  Moreover, since the motor housing portion 32 for housing the motor 11 is integrally formed in the gear case 3, the upper surface of the motor 11 is formed by the inner peripheral surface of the motor housing portion 32 and the bottom surface portion of the support receiving portion 33 of the gear housing portion 31. Since the motor 11 can be assembled and held in a state in which it and the circumferential surface are firmly fitted and protected, the motor case 113 is supported by the bottom surface of the outer case 2 and sealed and held in the motor housing portion 32. The inner peripheral surface of the outer case 2 and the outer peripheral surface of the gear case 3 can be closely sealed and housed, and the motor housing portion 32 receives and supports the pressure contact force during crimping pressure contact In the state, the inclined peripheral portion 21a can be bent. As a result, an improvement in the rigidity and strength of the entire casing structure and an improvement in the holding strength and the sealing degree of the motor 11 are simultaneously ensured, and in the state where the tip of the bearing housing 5 is connected and supported on the work side, the impact is externally applied. Even if it receives, it can eliminate the fear that induces the malfunction to the work.

  Further, the terminal block 6 is disposed on its upper surface portion to function as an abutment receiving surface for closely receiving and supporting the bottom surface portion of the inserted connector connection concave groove portion 412, and the connector 81 of the lead wire 8 is The bottom surface of the connector connecting concave portion 412 can be crimped and set to be set. That is, since the terminal block 6 also has a function as a partitioning member that partitions the space between the upper and lower openings 3a of the gear housing portion 31 and the motor housing portion 32 when the terminal block mounting portion 31a is mounted. In the front step of housing the gear case 3 in the outer case 2, on the gear housing portion 31 side, a terminal insertion hole formed in the bottom surface portion of the connector connecting concave groove 412 while being guided to the peripheral surface of the concave groove 311 The rubber base plate 41 is in close contact with the inner peripheral surface of the recessed groove portion 311 and the bottom surface portion of the terminal block 6 by collectively pushing in and penetrating the upper terminal tip portion 612 projecting from the upper surface portion of the terminal block 6. Can be assembled. On the other hand, on the motor housing portion 32 side, the wiring board 82 can be easily mounted and connected to the lower terminal tip end portion 611 which is juxtaposed and projected in the same direction in the opening 3a.

Further, since the outer peripheral surface of the terminal block 6 and the outer peripheral surface of the concave portion for connector connection are formed in an arc surface so as to be in close contact with the inner peripheral surface of the outer case, The outer case 2 was mounted by forming the outer peripheral surface of the connector connecting recessed groove portion 412 with an outer diameter slightly bulging from the inner peripheral surface of the outer case 2 in a state of being in close contact with the inner peripheral surface The gear case 3 can be inserted into contact with the inner peripheral surface of the outer case 2 with tight contact, and can be temporarily assembled in a state in which the retainer is restricted, so that the gear housing portion 31 and the motor housing portion It is possible not only to ensure close contact in a state in which the sealing property is maintained between the opening 3a and the opening 32a, but also to directly connect the concave groove 412 for connector connection to the inner peripheral surface of the outer case 2. The entire outer diameter is It can be fabricated fence.

DESCRIPTION OF SYMBOLS 1 Linear drive 11 Motor 11a Connection hole 11b Motor connection pin 111 Coil bobbin 112 Excitation coil 113 Motor case 114 Rotor 114a Air space part 114b Concave part 115 Motor shaft 116 Flange 12 Reduction gear means 13 Transmission gear 131 Support leg 131a Sliding contact Protrusions 132 Tooth portion 2 Outer case 21 Ground plate support portion 21a Sloped peripheral edge portion 22 Bottom portion 3 Gear case 3a Opening portion 31 Gear housing portion 31a Terminal block mounting portion 311 Recess groove portion 32 Motor housing portion 321 Support leg 33 Support receiving portion 4 Base plate 41 Rubber base plate 411 Convex rib 412 Recess groove part 5 for connector connection Bearing housing 5a Mounting part 51 Linear motion shaft 511 Female screw part 52 Bearing member 53 Rotary shaft 6 Terminal block 61 Connection terminal 611 Lower terminal tip part 612 Upper terminal tip part 7 Rubber Sheet 8 Lead wire 81 Connector 8 2 Wiring board

Claims (3)

A gear case in which a motor and reduction gear means for transmitting the rotation are accommodated in a cylindrical lid-like outer case is provided on the opening side of the outer case and interlocked with the reduction gear means to be movable forward and backward. Base plate for attaching a bearing housing in which a linear motion shaft is accommodated, and a connector connecting recessed groove portion for connecting a lead wire for supplying power to a motor closely attached to the base plate and immersingly formed in the gear case A linear motion drive device comprising:
The gear case has a gear accommodating portion in which the reduction gear means is disposed on the upper side, and a motor accommodating portion in which the motor is disposed on the lower side, and an arc surface having an arbitrary width is communicated and opened. While forming a part,
A terminal block connecting the lead wire and the motor connection pin between the connector connection concave groove and the motor connection pin projecting from the outer peripheral surface of the motor case opposite to the opening serving as the gear housing. Form a terminal block mounting part for arranging the
The terminal block has a lower terminal end portion on the lower surface side in parallel with a lower terminal tip projecting in the same direction as the motor connection pin, and an upper terminal projecting on the upper surface side so as to be insertable into the connector connecting recess. It has a connection terminal with a tip,
In the state where the terminal block is set in the terminal block mounting portion, the motor connection pin and the lower terminal leading end protruding into the opening are configured to be able to connect by connecting the wiring board from the outer peripheral side of the gear case A casing structure of a linear drive device characterized in that   2. The connector according to claim 1, wherein the terminal block is disposed to function as a contact receiving surface for closely receiving the bottom surface of the inserted connector connecting groove on the upper surface thereof. And a casing structure of a linear motion drive device, wherein the casing structure is configured to be set by press-insertion with respect to a bottom surface in the concave portion for connector connection. The linear motion according to claim 1 or 2, wherein the outer peripheral surface of the terminal block and the outer peripheral surface of the recessed groove portion for connector connection are formed in an arc surface so as to be in close contact with the inner peripheral surface of the outer case. Drive casing structure.