JP2017124651A - Self-propelled dolly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-propelled dolly which can transport transported objects having heavy loads and causes driving wheels to be securely grounded even when the driving wheels are worn.SOLUTION: In a self-propelled dolly 101 of the invention, a dolly frame 105 of a self-propelled dolly having three or more axles is divided into a two axle frame 105a having two axles and one axle frame 105b having only one axle. At least one of the axles of the two axle frame 105a is used as a driving shaft 104b, and the axle of the one axle frame 105b is used as a driving shaft or a driven shaft. The one axle frame 105b and the two axle frame 105a are coupled by a pin 110, etc.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a self-propelled trolley having three or more axles used for transporting a heavy load in a casting facility or other industrial facilities.

  In general, a self-propelled carriage used to convey a heavy load in an industrial facility has a structure that travels on a track rail with iron wheels. Patent Document 1 describes a self-propelled cart having two axles and one of which is a drive shaft driven by a reduction motor or the like.

  However, depending on the condition of the conveyed product, the self-propelled cart 301 may have to be very long as shown in FIG. 7, and in this case, there is a problem that the cart frame 305 cannot withstand the weight of the conveyed product 112. May occur. It is sufficient if the strength of the bogie frame 305 can be increased. However, if the strength cannot be increased due to restrictions on installation conditions, an axle is added to the central portion of the bogie frame 405 as shown in FIG. The load applied to the frame 405 will be reduced.

  In the self-propelled carriage 401 having three axes shown in FIG. 8, the left axle 404a is a drive shaft driven by the reduction motor 102, and the other two shafts 404b and 404c are driven shafts. None of these axles is provided with a shock absorber and is simply fixed via a flange unit 107.

  In this case, since the drive wheel 403a fixed to the drive shaft 404a wears faster than the driven wheels 403b and 403c attached to the driven shafts 404b and 404c, the driven wheels 403b and 403c are grounded to the track rail 411. If this is the case, the grounding of the drive wheel 403a becomes insufficient, and the drive wheel 403a slips. Due to this slip, not only the driving wheel 403a but also the track rail 411 wears, so that the acceleration / deceleration and stop of the self-propelled carriage 401 cannot be controlled.

  Further, the load applied to the drive wheels of the conventional self-propelled carriage is the reaction force of the wheels 303a and 303b in the case of the self-propelled carriage 301 in FIG. R21 = W, R22 = W, and the propulsive force that can be transmitted by the drive wheel is Fmax = γ · R21 = γ · W, where the friction coefficient is γ. Since the self-propelled carriage 301 in FIG. 7 has two axes, the drive wheel 303a surely contacts the track rail 111, so that there is no slip due to wear, and one of the two axes has a drive axis 304a. Since it is the traveling cart 301, there is no slip due to lack of transmittable propulsive force.

  However, in the self-propelled cart 401 of FIG. 8 in which the axle 404b is added to the central portion of the cart frame 405, R31 = 1/2 · W, R32 = W, R33 = 1/2 · W, and the drive wheels can be transmitted. The propulsive force is Fmax = γ · R31 = γ · 1/2 · W where the friction coefficient is γ.

  In this way, the self-propelled carriage 401 in FIG. 8 can obtain only a half propulsive force that can be transmitted to the general self-propelled carriage 301 in FIG. 7, and not only wear of the drive wheels 403a but also transmission. There is concern that slips may occur due to insufficient propulsion.

Japanese Utility Model Publication No. 62-91764

  Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, and can transport a heavy load with three or more axles, and even if the driving wheel is worn, the driving wheel is reliably grounded. It is to provide a self-propelled trolley that can.

  The self-propelled carriage of the present invention made to solve the above-mentioned problems is a self-propelled carriage frame having three or more axles, a two-axis frame having two axles, and an axle of 1 The two-axis frame is divided into a single-axis frame, at least one axle of the two-axis frame is a drive shaft, the axle of the one-axis frame is a drive shaft or a driven shaft, and the one-axis frame and the two-axis frame are It is characterized by pin connection.

  The self-propelled carriage of the present invention made to solve the above-described problems is a self-propelled carriage having a three-axis or more axle, a two-axle frame having two axles, and an axle comprising: It is divided into a uniaxial frame of only one axis, at least one axle of the biaxial frame is used as a drive shaft, the axle of the uniaxial frame is used as a drive shaft or a driven shaft, and the uniaxial frame and the biaxial frame Are connected via an axle.

  As in claim 3, a plurality of axles can be used as the drive shaft.

  Since the self-propelled carriage of the present invention has a structure having three or more axles, even when it is difficult to increase the strength of the carriage frame, a heavy load can be conveyed. In the self-propelled carriage of the present invention, the carriage frame is divided into a biaxial frame and a monoaxial frame, and at least one axle of the biaxial frame is used as a drive shaft. The wheel can be reliably grounded regardless of wear. For this reason, it is possible to eliminate the possibility of slipping due to a lack of propulsive force that can be transmitted to the drive wheel.

It is a front view which shows the trolley | bogie structure of the 1st Embodiment of this invention. It is a partial cross section top view which shows the trolley | bogie structure of the 1st Embodiment of this invention. It is an AA arrow line view of FIG. It is a partial cross section front view which shows the trolley | bogie structure of the 2nd Embodiment of this invention. It is a partial cross section top view which shows the trolley | bogie structure of the 2nd Embodiment of this invention. It is a BB arrow line view of FIG. It is a front view which shows the 2-axis trolley | bogie structure of a prior art. It is a front view which shows the triaxial trolley | bogie structure of a prior art.

Hereinafter, embodiments of the present invention will be described.
1 to 3 show a first embodiment of the present invention. This self-propelled carriage 101 is obtained by dividing a carriage frame 105 having three axes as a whole into a two-axis frame 105a and a one-axis frame 105b. The biaxial frame 105a has one of the axles as a drive shaft 104b and the other as a driven shaft 104c. A drive wheel 103a is attached to the drive shaft 104b, and the drive wheel 103a is driven by the reduction motor 102 to track. The vehicle can travel on the rail 111. The axle of the uniaxial frame 105b is a driven shaft 104a.

  As shown in FIG. 3, the drive shaft 104b passes through the reduction motor 102 having a hollow shaft 106, and is attached to the biaxial frame 105a by a flange unit 107. The reduction motor 102 is supported by a drive shaft 104b, and is pivotally attached to a detent bracket 108 provided on the biaxial frame 105a by a pin 108a.

  The divided biaxial frame 105a and the monoaxial frame 105b are connected by connecting the connecting brackets 109a and 109b provided on the respective frames with horizontal pins 110 as shown in FIGS. Yes. The connecting brackets 109a and 109b are indicated by hatching in FIGS. If the self-propelled carriage 101 is to have four axes, the one-axis frame 105b may be further expanded and connected.

  As described above, the self-propelled carriage 101 according to the first embodiment divides the carriage frame 105 having three axes and couples with the pins 110, and the drive wheels 103a are attached to the two-axis frame 105a. Reliably contacts the track rail 111 even when worn. Therefore, slip due to wear of the drive wheel 103a does not occur.

  Since the driving force of the self-propelled carriage 101 is determined by the friction coefficient γ between the driving wheel 103a and the track rail 111 and the pressing force (reaction force due to the load), the loads of both loads of the three axes act. Thus, it is preferable to dispose the drive wheel 103a on the central axle 104b where the pressing force is increased.

  That is, as shown in FIG. 1, when the load of the two articles to be mounted on the self-propelled carriage 101 is W, the reaction force of each wheel is R11 = 1/2 · W, R12 = W, R13 = 1 / 2 · W, and the propulsive force capable of transmitting the drive wheel is Fmax = γ · R12 = γ · W. This value is the same as that of the general two-axis cart shown in FIG. 7, and it is possible to prevent slipping due to wear of the driving wheel 103a and to prevent slipping due to lack of driving wheel transmittable propulsive force. it can.

Next, a second embodiment of the present invention shown in FIGS. 4 to 6 will be described.
The self-propelled carriage 201 of the second embodiment also has a structure in which the drive wheel 103a is rotated by the reduction motor 102, as in the first embodiment. A cart frame 205 having three axles is divided into a two-axis frame 205a and a one-axis frame 205b, and a driving wheel 103a is attached to the two-axis frame 205a.

  As shown in FIG. 6, the drive shaft 204b passes through the reduction motor 102 having the hollow shaft 106, and is attached to the frame 205a by a flange unit 107. The reduction motor 102 is supported by a drive shaft 204b, and is attached to a detent bracket 108 provided on the frame 205a by a pin 108a.

  A flange unit 213 for pin-connecting the other frame (one-axis frame) 205b is incorporated inside the drive wheel 103a of the drive shaft 204b, and is connected by a connection bracket 214 extending from the other frame. The connecting bracket 214 is hatched in each figure.

  In the present invention, when the drive wheel 103a is worn, the biaxial frames 105a and 205a having the drive shafts 104b and 204b rotate with respect to the single shaft frames 105b and 205b, and the ground of the drive wheel 103a to the track rail 111 is grounded. In order to make sure that the left and right wheels are evenly grounded, it is necessary that the pins 110 or the drive shafts 204b connecting the frames be parallel to the respective axles. In the second embodiment, since the drive shaft 204b also serves as a connecting pin between the frames, there is an advantage that centering for grounding the left and right wheels evenly is unnecessary.

  In the embodiment described above, the center of the three axes is the drive shafts 104b and 204b. However, since each frame has two or less axes, the structure can be surely grounded even if all the wheels are worn. For this reason, one or two of the remaining two driven shafts 104a, 104c, 204a, 204c may be used as the drive shaft according to the required acceleration.

  Thus, since the self-propelled carriage of the present invention has a structure having three or more axles, it can transport a heavy load. In addition, since the driving wheel can be reliably grounded regardless of whether or not it is worn, the occurrence of slip due to a lack of propulsive force that can be transmitted to the driving wheel can be eliminated.

  The self-propelled carriage of the present invention can be used in various industrial facilities for transporting a conveyed product. For example, a casting facility (a mold molding machine, a mold molding line, a molten metal transport line using a ladle, a pouring line to a mold) , Product cooling line, product transport line, product post-treatment line, etc.). In addition, examples of the conveyed product when the self-propelled carriage of the present invention is used for casting equipment include, for example, a cast frame, a mold, a mold with a cast frame, a surface plate or a surface plate carriage, a product, a pallet or a container for product conveyance , Ladle, surface plate or pallet for ladle conveyance.

101 Self-propelled cart 102 of the first embodiment Reduction motor 103a Drive wheel 104a Drive shaft 104b Drive shaft 104c Drive shaft 105 Cart shaft frame 105a Two-axis frame 105b Single-axis frame 106 Hollow shaft 107 Flange unit 108 Anti-rotation bracket 108a Pin 109a Connecting bracket 109b Connecting bracket 110 Pin 111 Track rail 112 Transported object 201 Self-propelled carriage 204a of the second embodiment 204a Drive shaft 204b Drive shaft 204c Drive shaft 205 Truck frame 205a Two-axis frame 205b Single-axis frame 213 Flange unit 214 Connection bracket 301 Conventional self-propelled bogie 303a Drive wheel 303b Driven wheel 305 Bogie frame 401 Conventional self-propelled bogie 403a Drive wheel 403b Driven wheel 403c Driven wheel 404a Axis 404b driven shaft 404c driven shaft 405 bogie frame 411 track rail

Claims (3)

  A bogie frame of a self-propelled bogie having three or more axles is divided into a biaxial frame having two axles and a uniaxial frame having only one axle, and at least one of the two axle frames A self-propelled carriage characterized in that an axle is a drive shaft, the axle of the one-axis frame is a drive shaft or a driven shaft, and the one-axis frame and the two-axis frame are coupled via a pin.   A bogie frame of a self-propelled bogie having three or more axles is divided into a biaxial frame having two axles and a uniaxial frame having only one axle, and at least one of the two axle frames A self-propelled carriage characterized in that an axle is a drive axis, an axle of the one-axis frame is a drive axis or a driven axis, and the one-axis frame and the two-axis frame are coupled via an axle.   The self-propelled carriage according to claim 1 or 2, wherein a plurality of axles are used as drive shafts.

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