JP2020161419A - Pedal switch for construction machinery and construction machinery - Google Patents

Abstract

To provide a compact electric pedal switch for construction machinery and construction machinery including the same.SOLUTION: The pedal switch 90 for construction machinery, an electric pedal switch installed in construction machinery, includes: an operating member 1; a magnet 3; and a magnetic detection sensor 5. The operating member 1 rotates around a first rotation axis A1 by an operator's pedal operation. The magnet 3 rotates around a second rotation axis A2 by rotation of the operating member 1. The magnetic detection sensor 5 detects a rotation angle of the magnet 3.SELECTED DRAWING: Figure 2

Description

The present invention relates to pedal switches for construction machinery and construction machinery.

An electric pedal switch is known as a device for driving an automobile at the feet (see Patent Document 1 and the like).

In recent years, in the field of construction machinery as well, the electrification of the entire machine has been promoted for the purpose of reducing environmental load and improving operability, and the need for electric pedal switches for construction machinery is increasing.

Japanese Unexamined Patent Publication No. 9-97535

Since the conventional electric pedal switch for construction machinery is relatively large, it may be difficult to install it depending on the type of construction machinery (for example, a small excavator car).

An object of the present invention is to provide a compact electric pedal switch for a construction machine and a construction machine including the pedal switch.

The pedal switch for a construction machine according to one aspect of the present invention is an electric pedal switch installed in a construction machine, and includes an operating member that rotates around a first rotation axis by a pedal operation by an operator and the operating member. It is provided with a magnet that rotates around a second rotation axis by the rotation of the magnet, and a magnetic detection sensor that detects the rotation angle of the magnet.

The construction machine according to one aspect of the present invention includes the pedal switch for the construction machine and the main body of the construction machine on which the pedal switch for the construction machine is installed.

The present invention has an effect that it is possible to provide a compact electric pedal switch for a construction machine and a construction machine equipped with the pedal switch.

FIG. 1 is a perspective view of a pedal switch for a construction machine according to the first embodiment. FIG. 2 is an exploded perspective view of the same pedal switch for construction machinery. FIG. 3 is an exploded perspective view of a main part of the pedal switch for construction machinery as described above. FIG. 4A is a perspective view of a main part when the operating member is rotated in the pedal switch for construction machinery of the same as above, and FIG. 4B is a perspective view of the main part when the operating member is rotated in the opposite direction in the pedal switch for construction machinery of the same. It is a perspective view of a main part. FIG. 5 is a bottom view of the same pedal switch for construction machinery with the bottom lid and the substrate removed. FIG. 6 is a perspective view of a cover covering the pedal switch for construction machinery of the above. FIG. 7 is a perspective view of a modified example of the pedal switch for construction machinery of the above. FIG. 8 is a perspective view of the construction machine on which the pedal switch for the construction machine is installed. FIG. 9 is a perspective view of the pedal switch for construction machinery according to the second embodiment. FIG. 10 is an exploded perspective view of the same pedal switch for construction machinery. FIG. 11 is an exploded perspective view of a main part of the pedal switch for construction machinery as described above. FIG. 12A is a perspective view of a main part when the operating member is rotated in the pedal switch for construction machinery of the same as above, and FIG. 12B is a perspective view of the main part when the operating member is rotated in the opposite direction in the pedal switch for construction machinery of the same. It is a perspective view of a main part. FIG. 13 is a bottom view of the same pedal switch for construction machinery with the bottom lid removed.

(Embodiment 1)
The pedal switch 90 for a construction machine according to the first embodiment shown in FIG. 1 and the like is installed in the driver's seat 958 of the construction machine main body 95 in the construction machine 9 as shown in FIG. 8, for example. In the following description, the pedal switch 90 for construction machinery is simply referred to as "pedal switch 90".

The construction machine main body 95 is a small excavator car. The construction machine main body 95 includes a crawler type traveling body 951, a swivel body 953 provided so as to be swivel on the traveling body 951, an arm device 955 connected to the front side of the swivel body 953, and a tip of the arm device 955. The attachment 957 attached to the portion is provided. The driver's seat 958 is provided on the swivel body 953.

The attachment 957 is a bucket in this example, but other attachments such as crushers, grapples, breakers, etc. can also be used. Further, the construction machine main body 95 on which the pedal switch 90 can be installed is not limited to a small excavator car, and may be a medium-sized or large-sized excavator car, a wheel loader, a bulldozer, a dump truck, or the like.

As shown in FIGS. 1 to 5, the pedal switch 90 is installed on the floor of the driver's seat 958. The pedal switch 90 is a foot-operated electric switch used for traveling the traveling body 951 and operating the attachment 957.

The pedal switch 90 includes an operation member 1, a housing 2, a magnet 3, an amplification member 4, a magnetic detection sensor 5, and a substrate 6, and further includes a first shaft member 71, a second shaft member 72, a C ring 73, and a return. It includes a spring 74 and a fixing bush 75. Hereinafter, these configurations will be described.

The operation member 1 is a metal member fixed to the pedal body so as to operate integrally with the pedal body (not shown). The operating member 1 is formed in a U shape by press working, and integrally has left and right side pieces 11 that are parallel to each other and a connecting piece 13 that connects the upper edges of the side pieces 11.

Through holes 110 for inserting the columnar first shaft member 71 are formed in the side pieces 11. The operating member 1 is rotatably supported around the first rotating shaft A1 by the first shaft member 71 inserted through the through holes 110 of both side pieces 11. In the present embodiment, the first rotating shaft A1 coincides with the central axis of the first shaft member 71.

An annular grooves are formed at both ends of the first shaft member 71 in the axial direction, and C-rings 73 for preventing slippage are fitted into the grooves. A return spring 74 is attached to the first shaft member 71. The return spring 74 is a metal spring member that urges the operating member 1 toward an intermediate position in the rotation range thereof. The return spring 74 includes a coil spring 741 into which the first shaft member 71 is inserted in the axial direction, a spring rod 743 extended from one end of the coil spring 741, and a spring rod 745 extended from the other end of the coil spring 741. , Have one. The spring rods 734 and 745 on both sides extend toward opposite sides of each other, and each is configured to be hooked on the inner surface of the side piece 11.

Through holes 130 for inserting the fixing bush 75 are formed in two places in the connecting piece 13 of the operating member 1. The fixing bush 75 is a cylindrical metal member used for fixing the pedal body to the operating member 1.

In the present embodiment, since the operation member 1 is formed separately from the pedal body, various types of pedal bodies can be selectively mounted, which has an advantage of high versatility. It is also possible to form the operating member 1 integrally with the pedal body.

The housing 2 is a molded product configured to rotatably support the operating member 1 via the first shaft member 71. Through holes 21 for inserting the first shaft member 71 are formed in the housing 2 at two places separated from each other on the left and right. The housing 2 is made of synthetic resin in order to reduce the weight, but may be made of a metal material in order to increase the strength.

A storage space 20 is formed in the housing 2 (see FIG. 5). The magnet 3, the amplification member 4, the magnetic detection sensor 5, and the substrate 6 are accommodated in the accommodation space 20. Further, a part of the operating member 1 is inserted into the accommodation space 20 through the opening 25. A part of the operating member 1 inserted here is the lower end portion 11a of the side piece 11. In the side piece 11, the lower end portion 11a is located below the through hole 110. The lower end portion 11a is formed with groove portions 115 opened downward and on both sides.

The accommodation space 20 is sealed by a removable bottom lid 29 that constitutes the bottom of the housing 2. By removing the bottom lid 29 from the housing 2, the accommodation space 20 is released downward (see FIG. 5).

The magnet 3 and the amplification member 4 are integrally formed by insert molding. The disk-shaped magnet 3 has a semi-disc-shaped first half portion 31 having an S-pole magnetic pole and a semi-disc-shaped second half portion 32 having an N-pole magnetic pole.

The amplification member 4 integrally has a member body 40 formed in a columnar shape and a protrusion 45 projecting outward from the member body 40. Although the amplification member 4 is made of synthetic resin, it can also be made of a metal material in order to increase the strength.

The magnet 3 is fixed to one end side in the axial direction of the member main body 40, and a part of the metal second shaft member 72 is inserted into the other end side in the axial direction. The other portion of the second shaft member 72 is inserted into the groove portion (not shown) of the housing 2. The amplification member 4 is rotatable around the second rotation shaft A2 via the second shaft member 72. In the present embodiment, the second rotating shaft A2 coincides with the central axis of the second shaft member 72.

The direction in which the protrusion 45 protrudes from the member body 40 is a direction non-parallel to the second rotation axis A2, and in the present embodiment, a direction orthogonal to the second rotation axis A2. The tip of the protrusion 45 is formed into a spherical shape.

As shown in FIGS. 3 to 5, the tip end portion of the protrusion 45 is inserted into the groove portion 115 of the side piece 11. When the protrusion 45 is caught in the groove 115, the rotation of the operating member 1 is converted into the rotation of the amplification member 4, and the magnet 3 rotates integrally with the amplification member 4.

In other words, the protrusion 45 located away from the second rotating shaft A2 of the amplification member 4 and the groove 115 located away from the first rotating shaft A1 of the operating member 1 are caught by each other. The amplification member 4 and the magnet 3 rotate in conjunction with the rotation of the operation member 1.

The amplification member 4 interposed between the operation member 1 and the magnet 3 has a function of amplifying the rotation angle of the operation member 1 and transmitting it to the magnet 3. In the present embodiment, the amplification member 4 is configured to amplify the rotation angle of the operation member 1 to about twice and transmit it to the magnet 3.

Further, the amplification member 4 has a function of converting the rotation of the operating member 1 around the first rotation axis A1 into a rotation around the second rotation axis A2 different from the first rotation axis A1. The first rotation axis A1 and the second rotation axis A2 are non-parallel to each other. In the present embodiment, the first rotation axis A1 and the second rotation axis A2 are provided so as to be orthogonal to each other, but are not limited to this, and are provided so as to intersect when viewed from either direction. Just do it.

The magnetic detection sensor 5 is a sensor used to detect the rotation angle of the magnet 3 in a non-contact manner. In the present embodiment, the magnetic detection sensor 5 is composed of a Hall sensor, but is not limited to this, and may be composed of another sensor such as an MR sensor.

The substrate 6 is a flat plate-shaped substrate on which the magnetic detection sensor 5 is mounted, and is fixed to the housing 2 in a posture facing the magnet 3 at a distance. In the present embodiment, the plane direction of the substrate 6 is parallel to the first rotation axis A1 and orthogonal to the second rotation axis A2. The parallel wording used in the present application is not limited to a strict meaning, and includes a case where the wording is substantially parallel. Similarly, the wording of orthogonality is not limited to a strict meaning, and includes the case of being substantially orthogonal.

In the pedal switch of the present embodiment, the substrate 6 can be arranged in the horizontal position in the accommodation space 20 by the above structure, and the overall height is significantly reduced. The pedal switch of the present embodiment is installed in the driver's seat 958 in a state of being covered with the rubber cover 8 as shown in FIG. The cover 8 has a side peripheral portion 85 having a bellows structure, and is deformed as the operating member 1 rotates integrally with the pedal body. The range in which the operating member 1 rotates integrally with the pedal body is a range of 14 ° forward and reverse around the first rotation axis A1 with reference to the intermediate position of the operating member 1, but is set to a range of an angle different from this. It is also possible to do.

In the pedal switch of the present embodiment, in order to pull out the wiring electrically connected to the substrate 6 to the outside of the housing 2, a wire seal 27 (see FIG. 5) having a plurality of insertion holes is provided in a part of the housing 2. Although it is incorporated, a direct connector 28 (see FIG. 7) may be used instead. In the modified example, the substrate 6 of the accommodation space 20 and the external connector can be electrically connected via the direct connector 28.

(Embodiment 2)
Next, the pedal switch 90 of the second embodiment will be described with reference to FIGS. 9 to 13. In the description of the second embodiment, the same components as those described in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

Similar to the first embodiment, the pedal switch 90 of the present embodiment includes an operation member 1, a housing 2, a magnet 3, an amplification member 4, a magnetic detection sensor 5, and a substrate 6, and further includes a first shaft member 71. It includes a C ring 73, a return spring 74, and a fixing bush 75.

On the other hand, in the present embodiment, instead of the second shaft member 72 which was the center of rotation of the amplification member 4 in the first embodiment, a support base 76 for supporting the amplification member 4 and the substrate 6 is provided.

The support base 76 integrally includes a rectangular flat plate-shaped base 761, a columnar shaft portion 763 that supports the amplification member 4 so as to be rotationally displaceable, and a plurality of support pillars 765 for supporting and fixing the substrate 6. It is a resin molded product. The shaft portion 763 and the plurality of support columns 765 project in the same direction from one surface of the base 761 facing the thickness direction. The plurality of support columns 765 are four support columns 765 protruding from the four corners of the base 761. The shaft portion 763 is located so as to be surrounded by these four support columns 765.

The shaft portion 763 of the support base 76 is inserted into the end portion of the member main body 40 of the amplification member 4 on the side opposite to the side on which the magnet 3 is fixed. The shaft portion 763 rotatably supports the amplification member 4 around the second rotation shaft A2.

The second rotation axis A2 in the present embodiment coincides with the central axis of the shaft portion 763. The second rotation axis A2 is set parallel to the first rotation axis A1.

As shown in FIG. 11 and the like, the tip end portion of the protrusion 45 protruding outward from the member body 40 is bent in an L shape. The direction in which the protrusion 45 protrudes from the member body 40 is a direction non-parallel to the second rotation axis A2, and in the present embodiment, a direction orthogonal to the second rotation axis A2. The direction in which the tip of the protrusion 45 bends is parallel to the second rotation axis A2.

The bent tip portion of the protrusion 45 is inserted into the groove portion 115 of the lower end portion 11a of the side piece 11 inserted into the accommodation space 20 through the opening 25 (see FIG. 13) of the housing 2 in the operating member 1. Will be done. When the protrusion 45 and the groove 115 are caught, the rotation of the operating member 1 is converted into the rotation of the amplification member 4, and the magnet 3 rotates integrally with the amplification member 4. In the present embodiment, the amplification member 4 is configured to amplify the rotation angle of the operation member 1 about three times and transmit it to the magnet 3.

The substrate 6 supports the magnetic detection sensor 5 at a position separated from the magnet 3 along the second rotation axis A2. The four corners of the rectangular flat plate-shaped substrate 6 are fixed one-to-one to the tips of the four support columns 765 of the support base 76.

In a state where the support base 76 and the substrate 6 are fixed, the lower end portion 11a of the operation member 1 and the amplification member 4 are located between the base 761 and the substrate 6 which are located parallel to each other. In the first embodiment, the substrate 6 is horizontally placed in the accommodation space 20, whereas in the present embodiment, the substrate 6 is vertically arranged in the accommodation space 20. The surface direction of the substrate 6 is non-parallel to the first rotation axis A1 and the second rotation axis A2, and specifically, is set to be orthogonal to the first rotation axis A1 and the second rotation axis A2.

In the pedal switch 90 of the present embodiment, since the first rotation axis A1 and the second rotation axis A2 are parallel as described above, the structure is such that the rotation of the operating member 1 can be smoothly converted into the rotation of the magnet 3. .. Further, since the structure is such that the rotation angle of the operating member 1 can be greatly amplified via the amplification member 4, the accuracy of rotation angle detection can be further improved.

In the present embodiment, the position where the substrate 6 is placed vertically is a position excluding the position below the opening 25, in other words, a position which does not overlap with the substrate 6 in a plan view. By this position setting, even if water should enter the accommodation space 20 through the opening 25, it is possible to prevent the water from hitting the substrate 6.

The pedal switches 90 of the first and second embodiments and the construction machine 9 provided with the pedal switches 90 have been described above. However, if the pedal switches 90 have the same effects and effects, the design may be appropriately changed in each embodiment. It is possible to apply the configurations of the embodiments in appropriate combinations.

For example, in the pedal switches 90 of the first and second embodiments, a protrusion (protrusion 45) is provided on the side of the amplification member 4, and a groove (groove 115) on which the protrusion is hooked is provided on the side of the operation member 1. The reverse is also possible. That is, a protrusion may be provided on one of the operation member 1 and the amplification member 4, and a groove on which the protrusion is hooked may be provided on the other of the operation member 1 and the amplification member 4.

(Aspect)
As described based on the first and second embodiments, the construction machine pedal switch (90) of the first aspect is an electric pedal switch installed in the construction machine (9) and is an operating member (1). ), A magnet (3) and a magnetic detection sensor (5). The operating member (1) rotates around the first rotation axis (A1) by the operator's pedal operation. The magnet (3) rotates around the second rotation axis (A2) by the rotation of the operating member (1). The magnetic detection sensor (5) detects the rotation angle of the magnet (3).

According to the construction machine pedal switch (90) of the first aspect, the entire switch can be formed compactly. Therefore, even a relatively small construction machine (9) can be easily incorporated.

Further, as described based on the first and second embodiments, the pedal switch (90) for construction machinery of the second aspect further includes an amplification member (4) in the first aspect. The amplification member (4) is interposed between the operation member (1) and the magnet (3) to increase the rotation angle of the operation member (1) and transmit it to the magnet (3).

According to the pedal switch (90) for construction machinery of the second aspect, the rotation angle is increased via the amplification member (4), so that the accuracy of rotation angle detection is improved.

Further, as described based on the first embodiment, the construction machine pedal switch (90) of the third aspect has the first rotation axis (A1) and the second rotation axis (A1) in the first or second aspect. A2) are non-parallel to each other.

According to the pedal switch (90) for construction machinery of the third aspect, the direction of the second rotation axis (A2) can be set with a high degree of freedom so that the entire switch can be made compact.

Further, as described based on the first embodiment, the pedal switch (90) for construction machinery according to the fourth aspect has the substrate (6) on which the magnetic detection sensor (5) is mounted in the third aspect. Further prepare. The plane direction of the substrate (6) is parallel to the first rotation axis (A1).

According to the pedal switch (90) for construction machinery of the fourth aspect, by arranging the substrate (6) horizontally, the entire switch can be further made compact.

Further, as described based on the second embodiment, the construction machine pedal switch (90) of the fifth aspect has the first rotation axis (A1) and the second rotation axis (A1) in the first or second aspect. A2) are parallel to each other.

According to the pedal switch (90) for construction machinery of the fifth aspect, the structure is such that the rotation of the operating member 1 can be smoothly converted into the rotation of the magnet 3.

Further, as described based on the second embodiment, the construction machine pedal switch (90) of the sixth aspect is the substrate (6) on which the magnetic detection sensor (5) is mounted in the fifth aspect. Further prepare. The plane direction of the substrate (6) is non-parallel to the first rotation axis (A1).

According to the construction machine pedal switch (90) of the sixth aspect, the arrangement of the substrate (6) can be set with a high degree of freedom.

Further, as described based on the second embodiment, the pedal switch (90) for construction machinery according to the seventh aspect includes the substrate (6) on which the magnetic detection sensor (5) is mounted and the substrate (6) in the fifth aspect. A housing (2) that rotatably supports the operating member (1) is further provided. The housing (2) has a storage space (20) for accommodating the substrate (6) and an opening (25) into which a part of the operating member (1) is inserted. The opening (25) communicates with the accommodation space (20) and is located at a position where it does not overlap with the substrate (6) in a plan view.

According to the pedal switch (90) for construction machinery of the seventh aspect, even if water should enter the accommodation space (20) through the opening (25), the water can be prevented from hitting the substrate (6). ..

Further, as described based on the first and second embodiments, the pedal switch (90) for construction machinery in the eighth aspect rotates the operating member (1) in any one of the first to sixth aspects. A housing (2) that freely supports the housing (2) is further provided. The housing (2) is made of synthetic resin.

According to the construction machine pedal switch (90) of the eighth aspect, the weight of the entire switch can be further reduced. Therefore, even a relatively small construction machine (9) can be easily incorporated.

Further, as described based on the first and second embodiments, the pedal switch (90) for construction machinery according to the ninth aspect further adds a return spring (74) in any one of the first to eighth aspects. Be prepared. The return spring (74) urges the operating member (1) toward an intermediate position in its rotation range.

According to the construction machine pedal switch (90) of the ninth aspect, the operation member (1) can be rotated in the forward and reverse directions with respect to the intermediate position. Since the operation member (1) naturally returns to the intermediate position by the urging force of the return spring (74), the operation is easy.

Further, as described based on the first and second embodiments, the pedal switch for construction machinery according to the tenth aspect is separated from the second rotation shaft (A2) of the amplification member (4) in the second aspect. The portion and the portion of the operating member (1) separated from the first rotation shaft (A1) are configured to be hooked on each other.

According to the pedal switch (90) for construction machinery of the tenth aspect, the operation member (1) and the amplification member (4) can be interlocked with each other in a compact structure.

Further, as described based on the first and second embodiments, the construction machine (9) of the first aspect includes the pedal switch (90) for the construction machine of any one of the first to tenth aspects, and the construction. It includes a construction machine main body (95) in which a mechanical pedal switch (90) is installed.

According to the construction machine (9) of the first aspect, it is possible to provide the construction machine (9) provided with a compact electric pedal switch (90) for the construction machine.

1 Operation member 2 Housing 20 Accommodation space 25 Opening 3 Magnet 4 Amplification member 5 Magnetic detection sensor 6 Board 74 Return spring 9 Construction machine 90 Construction machine pedal switch 95 Construction machine body A1 First rotation axis A2 Second rotation axis

Claims (11)

An electric pedal switch installed in construction machinery
An operating member that rotates around the first rotation axis by the operator's pedal operation,
A magnet that rotates around the second rotation axis due to the rotation of the operating member,
A pedal switch for construction machinery including a magnetic detection sensor that detects the rotation angle of the magnet. The pedal switch for construction machinery according to claim 1, further comprising an amplification member that is interposed between the operation member and the magnet to increase the rotation angle of the operation member and transmit it to the magnet. The pedal switch for construction machinery according to claim 1 or 2, wherein the first rotating shaft and the second rotating shaft are not parallel to each other. A substrate on which the magnetic detection sensor is mounted is further provided.
The pedal switch for construction machinery according to claim 3, wherein the surface direction of the substrate is parallel to the first rotation axis. The pedal switch for construction machinery according to claim 1 or 2, wherein the first rotating shaft and the second rotating shaft are parallel to each other. A substrate on which the magnetic detection sensor is mounted is further provided.
The pedal switch for construction machinery according to claim 5, wherein the surface direction of the substrate is not parallel to the first rotation axis. The board on which the magnetic detection sensor is mounted and
A housing that rotatably supports the operating member is further provided.
The housing has a storage space for accommodating the substrate and an opening into which a part of the operation member is inserted.
The pedal switch for construction machinery according to claim 5, wherein the opening communicates with the accommodation space and is located at a position not overlapping the substrate in a plan view. A housing that rotatably supports the operating member is further provided.
The housing is a pedal switch for construction machinery according to any one of claims 1 to 6, which is made of synthetic resin. The pedal switch for construction machinery according to any one of claims 1 to 8, further comprising a return spring that urges the operating member toward an intermediate position in the rotation range. The pedal switch for construction machinery according to claim 2, wherein a portion of the amplification member separated from the second rotating shaft and a portion of the operating member separated from the first rotating shaft are configured to be hooked on each other. .. The pedal switch for construction machinery according to any one of claims 1 to 10 and
A construction machine including a construction machine main body on which the pedal switch for the construction machine is installed.

Images