JP6769824B2 - Transmission, pumping equipment, drainage pump station - Google Patents

Description

The present invention relates to a transmission provided in a pump device, for example, a transmission of a drainage pump of a drainage pump station in a harbor.

There are few flatlands in Japan, and mountains occupy 75% of the land. As a result, many cities are located in the low-lying alluvial plains that stretch along the sea. In addition, as a regional characteristic, typhoons and huge earthquakes occur frequently, so urban residents are vulnerable to damage from storm surges.

In order to prevent damage from storm surges, a floodgate is installed at the boundary between the outer and inland waters separated by the embankment to prevent seawater from entering from the sea, and when the water level in the outer waters rises due to storm surges. , The floodgates are closed to prevent the water level from rising in the inland waters. When the water gate is closed and the water level in the inland water rises due to rainfall or the like, the pump device of the drainage pump station is operated to lower the water level in the inland water area (see, for example, Patent Document 1).

FIG. 6 shows an explanatory diagram of the drainage pump station 201. The drainage pump station 201 is provided at the boundary between the inland water area 215 and the outer water area 220, takes in the inland water from the intake port 225, pumps the inland water by the pump device 240 provided in the suction water channel 260, and is located in the outer water area 220. Drain from the drain port 230. Power from the drive source 255 is transmitted to the pump device 240 via the transmission 242, and a clutch mechanism 250 for switching between connection and disconnection of the power is provided between the transmission 242 and the drive source 255.

Japanese Unexamined Patent Publication No. 2011-208562

As mentioned above, the drainage pump station is an indispensable facility for preserving the urban functions of Japan, but in most cases, it operates less than 10 times throughout the year. Therefore, the pumping device 240 is in a stopped state for most of the time. However, since the vertical movement of the sea surface itself occurs on a daily basis, the following problems occur.

FIG. 7A shows an explanatory diagram of the pump device 140. The pump device 240 for pumping internal water includes a screw 285 and a transmission 242. The transmission 242 has a transmission gear mechanism 280 including an output shaft 340, an output side cap gear 200 fixed to the output shaft 340, and an input side cap gear 295, and an input fixed to the input side cap gear 295. Power is transmitted to the output shaft 340 through the shaft 350. Then, the output shaft 340 is fixed to the screw 285.

7 (B) and 7 (C) schematically show the meshing of the gear teeth on the AA surface (see FIG. 7 (A)) in which the output side bevel gear 200 and the input side bevel gear 295 mesh with each other. It is a figure. In FIG. 7A, when the seawater surface in the suction water channel 260 repeatedly moves up and down between the water level BB and the water level CC, the screw 285 rotates due to the water pressure and is clockwise when viewed from the tip direction of the screw 285. Rotation and counterclockwise rotation will be repeated alternately. Then, the output shaft 340 to which the screw 285 is fixed and the output side bevel gear 200 fixed to the output shaft 340 also repeat the same rotation. For example, assuming that the input side bevel gear 295 is substantially fixed, when the output side bevel gear 200 is rotated clockwise, the tooth surface 200A of the output side bevel gear 200 becomes the tooth of the input side bevel gear 295. It collides with the surface 295A on the DD surface (see FIG. 7B). On the contrary, when the output side bevel gear 200 is rotated counterclockwise, the tooth surface 200B of the output side bevel gear 200 collides with the tooth surface 295B of the input side bevel gear 295 on the EE surface (FIG. 7 (FIG. 7). See C)). Since the gap 297 is small, the velocity of the tooth surface itself at the time of such a collision is small. However, since the pump device 240 itself weighs several tons, the momentum is large, and therefore the impulse in the event of a collision is extremely large. Therefore, if such a collision is repeated, both the output side bevel gear 200 and the input side bevel gear 295 may be damaged. This situation is the same even when the input side bevel gear 295 is in a state where it can freely rotate.

In view of such circumstances, the present invention aims to provide a transmission for extending the life of a transmission gear mechanism due to vertical movement of the seawater surface.

(1) The present invention relates to an input shaft to which rotational power is input from the outside, an output shaft to output rotational power to the outside, and a transmission gear mechanism in which the input shaft and the output shaft are connected to transmit rotational power. A braking shaft that is separate from the input shaft, a braking mechanism that is provided on the braking shaft to regulate the rotation of the braking shaft, and the braking shaft and the output shaft are connected to the brake mechanism. Provided is a transmission provided with a braking gear mechanism for transmitting a braking force to the output shaft.

According to the invention described in (1) above, the transmission has a braking shaft that is a separate shaft from the input shaft, a brake mechanism provided on the braking shaft that regulates the rotation of the braking shaft, and a braking shaft and an output. Since the shaft is connected and provided with a braking gear mechanism that transmits the braking force of the brake mechanism to the output shaft, the output shaft is repeatedly rotated in the forward rotation direction and the reverse rotation direction by an external force. In some cases, the rotation can be restricted, and as a result, the tooth surface of the transmission gear mechanism can be protected, which is an excellent effect.

For example, if the transmission according to the present invention is applied as the transmission provided in the pump device used in the drainage pump station, when the seawater surface in the suction water channel moves up and down to rotate the screw, By braking the braking shaft with the braking mechanism, the rotation of the output shaft can be restricted, and as a result, the tooth surface of the transmission gear mechanism can be protected, which is an excellent effect.

(2) The transmission according to (1) above, wherein the transmission gear mechanism is configured such that the rotation speed of the input shaft is higher than the rotation speed of the output shaft. I will provide a.

According to the invention described in (2) above, the drive source connected to the input shaft has a remarkable effect that an efficient rotation speed can be selected.

(3) The present invention is characterized in that the output shaft is provided with a rotation direction limiting mechanism that brakes rotation in one direction and allows rotation in the other direction, according to the above (1) or (2). The described transmission is provided.

According to the invention described in (3) above, when the output shaft rotates in the rotation direction during normal operation, the output shaft will rotate in the direction opposite to the rotation direction during normal operation without hindering the rotation. In this case, the rotation can be prevented, so that the collision between the tooth surfaces of the input side bevel gear and the output side bead gear, which may occur during reverse rotation, can be prevented, and as a result, transmission is possible. It has the effect of protecting the tooth surface of the gear mechanism.

For example, if the transmission according to the present invention is applied as the transmission provided in the pump device used in the drainage pump station, when the output shaft rotates in the direction of pumping the inland water, the rotation is allowed and the direction is reversed. Since the rotation is braked when trying to rotate, it does not interfere with the normal operation, and the reverse rotation can be braked when the pump device is stopped. Therefore, it is possible to avoid a collision between the tooth surfaces of the input side bevel gear and the output side bevel gear, which may occur during reverse rotation, and it is possible to protect the tooth surface of the transmission gear mechanism, which is an excellent effect.

(4) The present invention provides the transmission according to (3) above, wherein the rotation direction limiting mechanism is provided at the base end of the output shaft.

According to the invention described in (4) above, since the rotation of the output shaft can be restricted with a relatively small installation area, large-scale construction is not required and the tooth surface protection is inexpensive. It has the excellent effect of being possible.

For example, if the transmission according to the present invention is applied as the transmission provided in the pump device used in the drainage pump station, a rotation direction limiting mechanism is provided in addition to the output shaft of the pump device provided in the existing drainage pump station. Since it can be done, large-scale construction is not required, and the cost is low. It has an excellent effect that improvement for tooth surface protection can be performed.

(5) The present invention provides the transmission according to any one of (1) to (4) above, wherein the brake mechanism is a hydraulic wet multi-plate brake.

According to the invention described in (5) above, a small brake mechanism having a small installation area can be realized, and even if a braking shaft or the like is added, a large-scale construction is not required and the cost is low. It has an excellent effect that it can be improved for surface protection. In addition, the brake operation is hydraulically ON / OFF controlled for easy handling, and since there is no brake shoe, a long-life brake mechanism can be realized.

(6) In the present invention, the input shaft and the output shaft are arranged so that their axial directions are perpendicular to each other, and the input shaft and the braking shaft are arranged so that their axial directions are perpendicular to each other. The transmission gear mechanism is configured to include an input side bevel gear provided on the input shaft and an output side bead gear provided on the output shaft and meshing with the input side bead gear. The braking gear mechanism is characterized by having the output side bevel gear and a braking side bevel gear provided on the braking shaft and meshing with the output side bevel gear (1). ) To (5).

According to the invention described in (6) above, since both the transmission gear mechanism and the braking gear mechanism are composed of the bevel gear mechanism, it has an excellent effect that a transmission that is small as a whole and has a low installation height can be realized. ..

(7) The present invention provides the transmission according to any one of (1) to (6) above, wherein the axial direction of the input shaft and the axial direction of the braking shaft are the same. To do.

According to the invention described in (7) above, the transmission gear mechanism and the braking side bevel gear mechanism can be provided at positions line-symmetrical with respect to the output side bevel gear, so that the levelness of the output side bevel gear is maintained. Therefore, it is advantageous, and since the distance between the gear mechanisms is large, it has an excellent effect that maintenance is easy.

(8) The present invention includes a control unit that controls the brake mechanism, and when the control unit defines the direction in which the output shaft is rotated by a steady rotation input with respect to the input shaft as forward rotation, the output shaft is The transmission according to any one of (1) to (7) above, wherein the brake mechanism is controlled to stop the rotation of the output shaft during normal rotation. ..

According to the invention described in (8) above, the forward rotation can be braked when the transmission is stopped. Therefore, it is possible to avoid a collision between the tooth surfaces of the input side bevel gear and the output side bevel gear, which may occur during forward rotation, and it is possible to protect the tooth surface of the transmission gear mechanism, which is an excellent effect.

(9) The present invention provides a pump device including the transmission according to any one of (1) to (8) above.

According to the invention described in (9) above, when the seawater surface in the suction water channel moves up and down to rotate the screw, the rotation of the output shaft can be restricted, and the transmission gear can be used. Since a transmission that can protect the tooth surface of the mechanism can be realized, an excellent effect that a pump device having a high operating rate can be realized as a result is achieved.

(10) The present invention is a drainage pump station having the pump device according to (9) above.

According to the invention described in (10) above, since drainage can be performed by a pump device equipped with a transmission capable of protecting the tooth surface of the transmission gear mechanism, maintenance work is small and the installation area is small and the cost is low. It has the excellent effect of realizing a drainage pump station.

(11) The present invention is characterized in that, when the brake mechanism stops the rotation of the braking shaft, the input shaft is in a free rotation state in which the input shaft can freely rotate. Provide the drainage pump station described in.

According to the invention described in (11) above, even if the drive source is accidentally driven while the brake mechanism limits the rotation of the braking shaft and as a result the output side bevel gear is stopped, the drive source Since it is not necessary to apply an abnormal load to the transmission gear mechanism, the possibility of failure is reduced.

(12) The present invention further includes a drive source for rotationally driving the input shaft, and a clutch mechanism for transmitting or disconnecting the power of the drive source between the drive source and the input shaft is provided for the control. The unit is characterized in that the clutch mechanism controls the power of the drive source when the brake mechanism stops the rotation of the braking shaft (10) or (11). ) Provide the drainage pump station.

According to the invention described in (12) above, since it is possible to realize a state in which the power to the input shaft is cut off by the clutch mechanism, the operation of the drive source can be started by anticipating the time when drainage is required in advance. By gradually connecting the clutch mechanism, it has a remarkable effect that proper drainage can be started.

According to the present invention, when the seawater surface in the suction water channel moves up and down to rotate the screw, the rotation of the output shaft can be restricted by braking the braking shaft with the brake mechanism. As a result, the tooth surface of the transmission gear mechanism can be protected, so that it is possible to realize a transmission with a small maintenance effort, a pump device equipped with the transmission, and a drainage pump station equipped with the transmission. Can be played.

It is explanatory drawing of the drainage pump station which concerns on embodiment of this invention. It is explanatory drawing of a transmission. (A) is a cross-sectional view perpendicular to the axial direction of the rotation direction limiting mechanism. (B) It is explanatory drawing explaining the mechanism of the one-way clutch. (A) It is sectional drawing of the brake mechanism. (B) It is sectional drawing of the brake mechanism in the state which is not braking. (C) It is sectional drawing of the brake mechanism in a braking state. It is explanatory drawing explaining the action of the rotation restriction by a brake mechanism and a rotation direction restriction mechanism. It is explanatory drawing of the conventional drainage pump station. (A) It is explanatory drawing of a pump device and a transmission device. (B) It is explanatory drawing of the meshing surface AA of the input side bevel gear and the output side bevel gear in the transmission gear mechanism. (C) It is explanatory drawing of the meshing surface AA of the input side bevel gear and the output side bevel gear in the transmission gear mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 5 are examples of embodiments in which the invention is carried out, and portions having the same reference numerals represent the same objects in the drawings. In each drawing, some configurations will be omitted as appropriate to simplify the drawings. Then, the size, shape, thickness, etc. of the member are exaggerated as appropriate.

FIG. 1 is an explanatory diagram of a drainage pump station 1 according to an embodiment of the present invention. The drainage pump station 1 is generally installed at the boundary between the inland water area 115 and the outer water area 120. The internal water is taken in from the intake port 125 and pumped up by the pump device (drainage pump) 140 provided in the suction water channel 160. Then, the water is drained from the drain port 130. The pump device 140 includes a screw 85 and a transmission 142 including an output shaft 40 for rotating the screw 85. The drainage pump station 1 according to the embodiment of the present invention is provided with a pump device 140, a drive source (motor) 155, and a clutch mechanism 150. The pump device 140 has a transmission 142, and the transmission 142 is provided with a brake mechanism 20, a rotation direction limiting mechanism 30, and a transmission gearbox 145. The speed change gear box 145 includes an output side bevel gear 100, an input side bevel gear 95, and a braking side bevel gear 90, and a transmission gear mechanism 80 and a braking gear mechanism 70 are configured, respectively. A clutch mechanism 150 for transmitting or disconnecting the power of the drive source is provided between the drive source 155 and the input shaft 50 of the transmission 142. Here, the clutch mechanism 150 is a hydraulic wet multi-plate clutch.

The operation of the clutch mechanism 150, the drive source 155, and the brake mechanism 20 described later is appropriately controlled by a control unit (not shown here). The control unit is composed of a CPU, RAM, ROM, and the like, and executes various controls. The CPU is a so-called central processing unit, and various programs are executed to realize various functions. The RAM is used as a work area and a storage area of the CPU, and the ROM stores an operating system and a program executed by the CPU.

A diesel engine is used as the drive source 155. When the amount of inland water to be pumped is small, an electric motor may be used as the drive source 155.

FIG. 2 is a cross-sectional view of the transmission 142. In the transmission 142, the input shaft 50 in which the rotational power is input from the drive source 155 through the clutch mechanism 150, the output shaft 40 that outputs the rotational power to the screw 85, and the input shaft 50 and the output shaft 40 are connected to the rotational power. The transmission gear mechanism 80, the braking shaft 60 which is a separate shaft from the input shaft 50, the brake mechanism 20 provided on the braking shaft 60 to regulate the rotation of the braking shaft 60, the braking shaft 60, and the output. A braking gear mechanism 70 is provided, to which a shaft 40 is connected and the braking force of the braking mechanism 20 is transmitted to the output shaft 40. Further, the rotation direction limiting mechanism 30 is provided at the base end of the output shaft 40.

The transmission gear mechanism 80 is configured so that the rotation speed of the input shaft 50 is higher than the rotation speed of the output shaft 40. That is, the transmission 142 according to the present embodiment is a so-called speed reducer.

The input shaft 50 and the output shaft 40 are arranged so that their axial directions are perpendicular to each other, and the transmission gear mechanism 80 is provided on the input side bevel gear 95 provided on the input shaft 50 and on the output shaft 40. It is configured to have an output side bevel gear 100 that meshes with an input side bead gear 95. That is, the transmission gear mechanism 80 is a so-called bevel gear mechanism.

Further, the input shaft 50 and the braking shaft 60 are arranged so that their axial directions are perpendicular to each other, and the braking gear mechanism 70 is provided on the output side bevel gear 100 and the braking shaft 60 so that the output side bevel gear 100 is provided. It is configured to have a braking side bevel gear 90 that meshes with. That is, the braking gear mechanism 70 is a so-called bevel gear mechanism.

The axial direction of the input shaft 50 and the axial direction of the braking shaft 60 are the same, and the braking side bevel gear 90 and the input side bevel gear 95 are installed at positions symmetrical with respect to the output side bevel gear 100.

FIG. 3A is a cross-sectional view of the rotation direction limiting mechanism 30 perpendicular to the axial direction. The rotation direction limiting mechanism 30 is provided at the base end of the output shaft 40 to brake the rotation in one direction and allow the rotation in the other direction. Here, the direction in which the output shaft 40 rotates due to the steady rotation input to the input shaft 50, that is, the direction in which the screw 85 rotates so as to pump up the internal water is defined as the forward rotation (forward rotation) of the output shaft 40. The limiting mechanism 30 has a function of idling for forward rotation, not limiting rotation, and locking for reverse rotation (reverse) to apply a backstop. Specifically, the rotation direction limiting mechanism 30 has a one-way clutch 32.

3 (B) and 3 (C) are explanatory views illustrating the mechanism of the one-way clutch 32. The one-way clutch 32 is provided with a roller 34 in a wedge portion 36 composed of an outer peripheral surface 40A of the output shaft 40 and an inner peripheral surface 30A of the rotation direction limiting mechanism 30. The roller 34 is pressed by the spring 35 in the narrow portion direction of the wedge portion 36. FIG. 3B shows a state in which the output shaft 40 is rotating in the forward direction. At this time, since the roller 34 rotates counterclockwise in the drawing, the one-way clutch 32 idles and the output shaft 40 rotates. Does not interfere. On the other hand, FIG. 3C shows a state in which the output shaft 40 is about to rotate in the reverse direction. At this time, the roller 34 tries to rotate clockwise in the drawing, but since the roller 34 is pressed against the wedge portion 36 by the spring 35, the roller 34 is fitted into the narrow portion and is locked by the frictional force. Therefore, the rotation of the output shaft 40 is restricted. By providing the rotation direction limiting mechanism 30 at the base end of the output shaft 40, when the water level on the seawater surface in the suction water channel 160 moves up and down, the screw 85 rotates and the output shaft 40 rotates in the reverse rotation direction. This can be prevented from damaging the tooth surface of the transmission gear mechanism 80.

Next, the braking mechanism of the output side bevel gear 100 by the brake mechanism 20 and the braking shaft 60 will be described.

FIG. 4A is a cross-sectional view of the brake mechanism 20. The brake mechanism 20 is a hydraulic wet multi-plate brake, and has the same structure as the clutch mechanism 150. Therefore, it has the advantages of being small, having a small installation area, and consuming less power during braking than a disc brake.

The brake mechanism 20 includes a clutch case 24, a clutch hub 25, and a clutch piston 22, and the clutch case 24 is provided with a plurality of steel plates 26. Although free movement is possible in the axial direction of the clutch case 24, the circumference is Movement is restricted in terms of direction. The braking shaft 60 is provided with a plurality of friction plates 28. The friction plate 28 can move freely in the axial direction of the braking shaft 60, but the movement is restricted in the circumferential direction. The steel plates 26 and the friction plates 28 are staggered. A bearing 23 is installed between the braking shaft 60 and the clutch hub 25, and the braking shaft 60 can rotate with respect to the clutch hub 25 with less frictional force.

FIG. 4B is a cross-sectional view of the brake mechanism 20 in a non-braking state. At this time, the hydraulic pressure from the oil passage 21 to the hydraulic chamber 27 is small, and no force is applied to the clutch piston 22. In this state, since the steel plate 26 and the friction plate 28 are not pressed against each other, the braking shaft 60 can rotate freely.

FIG. 4C is a cross-sectional view of the brake mechanism 20 in the braking state. At this time, hydraulic pressure is applied to the hydraulic chamber 27 through the oil passage 21, and the clutch piston 22 is pushed out in the direction of the alternate long and short dash arrow. Then, the steel plate 26 and the friction plate 28 sandwiched between the clutch piston 22 and the back plate 29 are pressed against each other to generate a frictional force. Due to this frictional force, the friction plate 28 limits the rotation of the braking shaft 60, which causes a braking action.

Needless to say, the brake mechanism 20 does not brake the braking shaft 60 when the pump device 140 is in the steady operation state.

With the above configuration, the brake mechanism 20 can limit the rotation of the braking shaft 60, and the braking shaft 60 is braked. Since the rotation of the output side bevel gear 100 connected to the braking side bevel gear 90 is also restricted, the screw 85 moves around when the water level on the seawater surface in the suction water channel 160 moves up and down. It is possible to prevent the output shaft 40 from rotating and to avoid damaging the tooth surface of the transmission gear mechanism 80.

Next, the operation of the above-described embodiment will be described.

First, the operation of stopping the pump device 140 in the drainage pump station 1 will be described from the time when the pump device 140 is in the steady operation state, that is, when the output shaft 40 is rotating in the forward direction in the direction of pumping the internal water. First, the control unit (not shown) reduces the power of the drive source 155 to stop it. At this time, the clutch mechanism 150 may be in the connected state or the disconnected state. When the power of the drive source 155 is reduced and the rotation of the input shaft 50 is close to the stopped state, the clutch mechanism 150 is disconnected. That is, when the output shaft 40 is rotating in the forward direction, the brake mechanism 20 is controlled to stop the rotation of the output shaft 40. That is, the control unit operates the brake mechanism 20 to limit the rotation of the braking shaft 60, and stops the forward rotation of the output shaft 40 through the braking side bevel gear 90. Then, the rotation of the output shaft 40 is restricted by the brake mechanism 20 through the braking side bevel gear 90 in the forward rotation direction, and at the same time, the rotation of the output shaft 40 is restricted by the rotation direction limiting mechanism 30 in the reverse rotation direction. That is, by the above operation, a stopped state in which so-called backlash does not occur can be realized.

In FIG. 5, how the stopped state in which the backlash does not occur is realized by the rotation direction limiting mechanism 30 and the brake mechanism 20 will be specifically described. In FIG. 5, the bevel gear is represented as a spur gear in order to clearly express the meshing of the tooth surfaces of the braking side bevel gear 90 and the output side bevel gear 100 in the braking gear mechanism 70. FIG. 5A shows a state in which the output side bevel gear 100 is rotating forward just before the stopped state. When the brake mechanism 20 stops the rotation of the braking shaft to which the braking side bevel gear 90 is fixed, the tooth surface 90A of the braking side bevel gear 90 and the tooth surface 100A of the output side bevel gear 100 are in contact with each other. At this time, as shown in FIG. 5B, the rotation direction limiting mechanism 30 operates so that the output side bevel gear 100 is rotated in the clockwise direction so as not to be in the state shown by the dotted line. That is, since the rotation direction limiting mechanism 30 acts in a direction that prevents the output side bevel gear 100 from rotating in the reverse direction, a stopped state in which backlash does not occur is realized.

When the brake mechanism 20 stops the rotation of the braking shaft 60, the input shaft 50 is in a free rotation state in which it can freely rotate. That is, the control unit controls the clutch mechanism 150 so as to cut off the power of the drive source 155.

By braking the output shaft 40 in this way, the input side bevel gear 95 and the output side umbrella constituting the transmission gear mechanism 80 are caused by the output shaft 40 repeating forward rotation and reverse rotation due to the vertical movement of the seawater surface. It is possible to prevent the tooth surface of the gear 100 from causing chattering damage.

Next, the operation of changing the pump device 140 from the stopped state to the steady operation state in the drainage pump station 1 will be described.

First, the operation of the drive source 155 is started by the control unit while the clutch mechanism 150 is in the disengaged state. Then, when the steady operation state is reached, the braking of the brake mechanism 20 is released, the clutch mechanism 150 is gradually connected, and the pump device 140 is brought into the steady operation state. By controlling in this way, the pump device 140 can be guided to a steady operation state without erroneously applying a large load to the drive source 155 and the transmission gear mechanism 80. That is, the operation of the drive source 155 can be started by anticipating the time when drainage is required in advance, and by gradually connecting the clutch mechanism 150, it is possible to safely start proper drainage. Play.

According to the pump device 140, when an external force acts on the output shaft 40 of the transmission 142 to rotate the output shaft 40 alternately in the forward rotation direction and the reverse rotation direction, the rotation is limited. As a result, the tooth surface of the transmission gear mechanism 80 can be protected. When the pump device 140 is used in the drainage pump station 1 as in the present embodiment, the output shaft 40 tries to rotate via the screw 85 due to the vertical movement of the seawater surface in the suction water channel, but the brake By braking the braking shaft 60 with the mechanism 20, the rotation of the output shaft 40 can be restricted. As a result, protection of the tooth surface can be achieved. At this time, in the present embodiment, in the braking gear mechanism 70, the power transmission from the braking side bevel gear 90 to the output side bevel gear 100 is a reduction gear train, so that even a small torque is efficient on the braking mechanism 20 side. You can brake well. Further, since the axial directions of the input shaft 50 and the braking shaft 60 are the same (coaxial), the transmission gear mechanism 80 and the braking side bevel gear mechanism 70 are provided at line-symmetrical positions around the output side bevel gear 100. Can be done. As a result, the axial reaction force of the toothed portion acting on the output side bevel gear 100 is balanced, and the radial reaction force acting on the toothed portion is canceled, so that the levelness of the output side bevel gear 100 is maintained. Therefore, it becomes advantageous, and the load acting on the bearing or the like that pivotally supports the output side bevel gear 100 is reduced. In addition, since the distance between the gear mechanisms is large, maintenance work is easy.

Further, since the pump device 140 has a rotation direction limiting mechanism 30, when the output shaft 40 rotates in the rotation direction during normal operation, the rotation is not hindered, and the rotation direction is different from that during normal operation. When the output shaft 40 tries to rotate in the opposite direction, the rotation can be prevented. As a result, it is possible to prevent a collision between the tooth surfaces of the input side bevel gear 95 and the output side bevel gear 100 that may occur during reverse rotation, and as a result, the tooth surface of the transmission gear mechanism 80 is protected. it can. At this time, since the rotation direction limiting mechanism 30 is provided at the base end of the output shaft 40, the rotation of the output shaft 40 can be restricted while keeping the entire device in a relatively small installation area. As a result, large-scale construction is not required, and tooth surface protection at low cost becomes possible. For example, when used in the drainage pump station 1, a rotation direction limiting mechanism 30 can be additionally provided in addition to the output shaft 40 of the existing pump device, so that large-scale construction is not required. The cost can also be reduced.

Further, in the pump device 140, since the brake mechanism 20 is a hydraulic wet multi-plate brake, the installation area can be reduced due to its small size, and even if a braking shaft or the like is added, a large-scale construction is not required. Become. In the case of a hydraulic wet multi-plate brake, fine adjustment of all parts / members may be performed so that a braking force can be effectively exerted with respect to rotation in one direction. In that case, it is preferable to set the one direction to the normal rotation direction of the output shaft 40. This is because the braking force in the reverse direction may be inferior to that on the forward rotation side, but the braking force can be distributed to the rotation direction limiting mechanism 30 side. In the case of a hydraulic wet multi-plate brake, since the brake operation is controlled by hydraulic ON / OFF, it is easy to handle, energy consumption is suppressed, and the life can be extended because there is no brake shoe.

In the pump device 140, when the brake mechanism 20 stops the rotation of the braking shaft 60, the clutch mechanism 150 is released to put the input shaft 50 in a free rotation state. As a result, since it is not necessary to apply an abnormal load to the drive source and the transmission gear mechanism 80 during standby, the possibility of failure is reduced.

It should be noted that the transmission, pump device, and drainage pump station according to the present invention are not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the gist of the present invention.

1 Drainage pump station 10, 210 Engine room 20 Brake mechanism 21 Oil passage 22 Clutch piston 23 Bearing 24 Clutch case 25 Clutch hub 26 Steel plate 27 Hydraulic chamber 28 Friction plate 29 Back plate 30 Rotational direction limiting mechanism 32 One-way clutch 34 Roller 35 Spring 36 Wedge 40, 340 Output shaft 50, 350 Input shaft 60 Braking shaft 70 Braking gear mechanism 80, 280 Transmission gear mechanism 85, 285 Screw 90, 290 Braking side cap gear 95, 295 Input side cap gear 100, 200 Output side Beet gear 101, 201 Drainage pump station 110, 210 Engine room 115, 215 Inner water area 120, 220 Outer water area 125, 225 Intake port 130, 230 Drain port 135, 235 Pump room 140, 240 Pump device 142, 242 Transmission device 145, 245 Gearbox 150, 250 Clutch mechanism 155, 255 Drive source 160, 260 Suction channel 297 Gap

Claims (10)

An input shaft to which rotational power is input from the outside,
An output shaft that outputs rotational power to the outside,
A transmission gear mechanism to which the input shaft and the output shaft are connected to transmit rotational power,
A braking shaft that is different from the input shaft,
A brake mechanism provided on the braking shaft to regulate the rotation of the braking shaft,
A braking gear mechanism in which the braking shaft and the output shaft are connected and the braking force of the braking mechanism is transmitted to the output shaft.
Equipped with a,
A transmission characterized in that the output shaft is provided with a rotation direction limiting mechanism that brakes rotation in one direction and allows rotation in the other direction . An input shaft to which rotational power is input from the outside,
An output shaft that outputs rotational power to the outside,
A transmission gear mechanism to which the input shaft and the output shaft are connected to transmit rotational power,
A braking shaft that is different from the input shaft,
A brake mechanism provided on the braking shaft to regulate the rotation of the braking shaft,
A braking gear mechanism in which the braking shaft and the output shaft are connected and the braking force of the braking mechanism is transmitted to the output shaft.
With a control unit that controls the brake mechanism
With
The control unit
When the direction in which the output shaft rotates due to the steady rotation input to the input shaft is defined as forward rotation, the brake mechanism is controlled to stop the rotation of the output shaft when the output shaft is rotating in the forward direction. A transmission characterized by being made to rotate. The transmission according to claim 1 or 2 , wherein the transmission gear mechanism is configured such that the rotation speed of the input shaft is higher than the rotation speed of the output shaft. A claim according to any one of claims 1 to 3, wherein the output shaft is provided with a rotation direction limiting mechanism that brakes rotation in one direction and allows rotation in the other direction. The transmission according to. The transmission according to claim 4 , wherein the rotation direction limiting mechanism is provided at a base end of the output shaft. The transmission according to any one of claims 1 to 5 , wherein the brake mechanism is a hydraulic wet multi-plate brake. The input shaft and the output shaft are arranged so that their axial directions are perpendicular to each other.
The input shaft and the braking shaft are arranged so that their axial directions are perpendicular to each other.
The transmission gear mechanism is
The input side bevel gear provided on the input shaft and
An output side bevel gear provided on the output shaft and meshing with the input side bevel gear,
Consists of
The braking gear mechanism is
The output side bevel gear and
A braking side bevel gear provided on the braking shaft and meshing with the output side bevel gear,
Transmission according to any one of claims of claims 1 to 6, characterized in that it is configured to have a. The transmission according to any one of claims 1 to 7 , wherein the axial direction of the input shaft and the axial direction of the braking shaft are the same. It is a drainage pump station equipped with a pump device.
The transmission of the pump device is
An input shaft to which rotational power is input from the outside,
An output shaft that outputs rotational power to the outside,
A transmission gear mechanism to which the input shaft and the output shaft are connected to transmit rotational power,
A braking shaft that is different from the input shaft,
A brake mechanism provided on the braking shaft to regulate the rotation of the braking shaft,
A braking gear mechanism in which the braking shaft and the output shaft are connected and the braking force of the braking mechanism is transmitted to the output shaft.
Is equipped with
A drainage pump station characterized in that the input shaft is in a free rotation state in which the input shaft can freely rotate when the brake mechanism stops the rotation of the braking shaft. The transmission has a control unit that controls the brake mechanism.
The control unit
When the direction in which the output shaft rotates due to the steady rotation input to the input shaft is defined as forward rotation, the brake mechanism is controlled to stop the rotation of the output shaft when the output shaft is rotating in the forward direction. Is designed to let you
Further provided with a drive source for rotationally driving the input shaft,
A clutch mechanism for transmitting or disconnecting the power of the drive source is provided between the drive source and the input shaft.
Wherein the control unit according to claim 9, wherein the brake mechanism when that stops the rotation of the brake shaft, said clutch mechanism and performing control to block the power of the driving source Drainage pump station.

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