Connection locking mechanism and hydraulic work device

Abstract

The utility model provides a connecting locking mechanism and hydraulic working device. The first edge portion (36) and the second edge portion (38) are formed in the outer periphery of the drive unit (10) side of the connecting locking mechanism (30). When the first edge portion (36) of the connecting locking mechanism (30) is opposite the convex portion (18) of the drive unit (10), the connecting locking mechanism (30) can be pressed to the drive unit (10) side to release the connection between the tool unit (20) and the drive unit (10). In addition, when the second edge portion (38) of the connecting locking mechanism (30) is opposite the convex portion (18) of the drive unit (10), the connecting locking mechanism (30) cannot be pressed to the drive unit (10) side to the extent that the connection between the tool unit (20) and the drive unit (10) is released.

Description

Technical Field

[0001] This disclosure relates to a connection locking mechanism and a hydraulic working device. Background Technology

[0002] Previously, portable hydraulic work devices have been used for rescue operations, an example being Japanese Patent Publication No. 2010-280011A (JP2010-280011A). The hydraulic work device disclosed in JP2010-280011 includes: a hydraulic generating unit having a battery, an electric motor powered by the battery, and a hydraulic pump driven by the electric motor; and a head unit that can be attached to and detached from the hydraulic generating unit, having a tip tool driven by the working oil generated by the hydraulic generating unit. Various tools such as cutters and spreaders are provided as the tip tool installed on the head unit, allowing for a variety of operations to be performed by changing the head unit. Furthermore, by allowing the hydraulic generating unit and the head unit to be separated, portability is improved, and the workload of on-site personnel is reduced. Utility Model Content

[0003] Existing hydraulic working devices include: a tool unit having a tool; and a drive unit having a motor that drives a hydraulic pump for supplying working oil to the tool in the tool unit. When the tool unit and the drive unit are connected, the hydraulic pump supplies working oil to the tool, thereby enabling the tool to work. Furthermore, the tool unit and the drive unit are detachably connected via a generally cylindrical connecting and locking mechanism.

[0004] In existing hydraulic working devices, when detaching the tool unit from the drive unit, the drive unit and the tool unit can be separated simply by pressing the connecting locking mechanism toward the drive unit side. However, in such hydraulic working devices, if the connecting locking mechanism is pressed toward the drive unit side due to accidental contact or other reasons, the drive unit and the tool unit may be separated against the operator's intention, potentially causing an accident.

[0005] This disclosure is made with the consideration of the following points in mind, and its purpose is to provide a connection locking mechanism and a construction machinery system with a hydraulic working device that can safely and reliably load and unload the drive unit and tool unit.

[0006] The connection locking mechanism of this utility model is characterized by the following:

[0007] The connection locking mechanism is generally cylindrical in shape and is used to connect a tool unit with tools to a drive unit. The drive unit has a motor that drives a hydraulic pump to supply working oil to the tools in the tool unit.

[0008] The connection locking mechanism is mounted in a manner that allows it to rotate relative to the drive unit.

[0009] When the tool unit is connected to the drive unit using the connection locking mechanism, the hydraulic pump supplies working oil to the tool, thereby enabling the tool to operate.

[0010] A protruding portion is provided on the outer peripheral surface of the end of the drive unit, extending radially outward from the end.

[0011] The connection locking mechanism is configured such that, when the tool unit and the drive unit are in a locked state, the connection between the tool unit and the drive unit is released by pressing it towards the drive unit side.

[0012] A first edge portion and a second edge portion are formed on the outer periphery of the end of the connection locking mechanism on the drive unit side. The first edge portion and the second edge portion extend circumferentially along the connection locking mechanism in a plane intersecting the central axis of the generally cylindrical shape of the connection locking mechanism. A step is formed between the first edge portion and the second edge portion. When the first edge portion of the connection locking mechanism is opposite to the convex portion of the drive unit, the connection locking mechanism can be pressed towards the drive unit side to release the connection between the tool unit and the drive unit. When the second edge portion of the connection locking mechanism is opposite to the convex portion of the drive unit, the connection locking mechanism cannot be pressed towards the drive unit side to the extent that the connection between the tool unit and the drive unit is released.

[0013] The connection locking mechanism of this utility model may also include a limiting member, which is used to limit the area in which the connection locking mechanism can rotate relative to the driving unit.

[0014] Alternatively, the limiting member may have a first protrusion disposed on the first edge portion and a second protrusion disposed on the second edge portion, wherein the first protrusion and the second protrusion are configured such that when the connection locking mechanism is rotated relative to the drive unit, it abuts against the convex portion of the drive unit, thereby preventing the connection locking mechanism from rotating further.

[0015] Alternatively, the connection locking mechanism can be pressed toward the drive unit side to the extent that the connection between the tool unit and the drive unit is released only when the first protrusion abuts against or approaches the convex portion of the drive unit.

[0016] Alternatively, the height of the first protrusion relative to the first edge portion may be greater than the height of the step formed between the first edge portion and the second edge portion.

[0017] Alternatively, the length between the first protrusion along the outer periphery of the drive unit side and the step in the connection locking mechanism may be approximately the same as the length of the convex portion along the outer periphery of the drive unit.

[0018] Alternatively, the length of the first edge portion along the outer periphery of the drive unit side in the connection locking mechanism may be greater than the length of the second edge portion.

[0019] The hydraulic working device disclosed herein is characterized in that,

[0020] This hydraulic working device has the following features:

[0021] A tool unit, which has tools;

[0022] A drive unit having a motor that drives a hydraulic pump for supplying working oil to the tools of the tool unit; and

[0023] A generally cylindrical connecting and locking mechanism, mounted in a rotatable manner relative to the drive unit, is used to connect the tool unit to the drive unit.

[0024] When the tool unit is connected to the drive unit using the connection locking mechanism, the hydraulic pump supplies working oil to the tool, thereby enabling the tool to operate.

[0025] A protruding portion is provided on the outer peripheral surface of the end of the drive unit, extending radially outward from the end.

[0026] The connection locking mechanism is configured such that, when the tool unit and the drive unit are in a locked state, the connection between the tool unit and the drive unit is released by pressing it towards the drive unit side.

[0027] A first edge portion and a second edge portion are formed on the outer periphery of the end of the connection locking mechanism on the drive unit side. The first edge portion and the second edge portion extend circumferentially along the connection locking mechanism in a plane intersecting the central axis of the generally cylindrical shape of the connection locking mechanism. A step is formed between the first edge portion and the second edge portion. When the first edge portion of the connection locking mechanism is opposite to the convex portion of the drive unit, the connection locking mechanism can be pressed towards the drive unit side to release the connection between the tool unit and the drive unit. When the second edge portion of the connection locking mechanism is opposite to the convex portion of the drive unit, the connection locking mechanism cannot be pressed towards the drive unit side to the extent that the connection between the tool unit and the drive unit is released.

[0028] Effects of the utility model

[0029] According to this utility model, a connection locking mechanism capable of safely and reliably loading and unloading drive units and tool units, and a construction machinery system with a hydraulic working device can be obtained. Attached Figure Description

[0030] Figure 1 This is a perspective view of a hydraulic working device that uses the connection and locking mechanism of this embodiment to connect and lock the tool unit and the drive unit.

[0031] Figure 2 yes Figure 1 A top view of the hydraulic working device shown.

[0032] Figure 3 yes Figure 1 The right view of the hydraulic working device shown.

[0033] Figure 4 yes Figure 1 Left view of the hydraulic working device shown.

[0034] Figure 5 It means Figure 1 A perspective view of the drive unit of the hydraulic working device and the connection locking mechanism installed on the drive unit.

[0035] Figure 6 This is a perspective view showing the structure of the connection locking mechanism in this embodiment.

[0036] Figure 7 It indicates viewing from the rear side. Figure 6 A three-dimensional view of the structure when the locking mechanism is connected. Detailed Implementation

[0037] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Figures 1 to 7 This diagram illustrates the connection locking mechanism 30 of this embodiment and the hydraulic working device that uses the connection locking mechanism 30 to connect and lock the tool unit 20 to the drive unit 10.

[0038] First, use Figures 1-5 The constituent elements of the hydraulic working device of this embodiment are explained.

[0039] The drive unit 10 includes: a battery 12, which is composed of a secondary battery such as a lithium-ion battery or a nickel-metal hydride battery; a gripping part 14, which is gripped by an operator; and a motor 16, which is driven by a hydraulic pump (not shown) for supplying working oil to the tool unit 20. In addition, a protrusion 18 is formed on the outer peripheral surface of the motor 16 of the drive unit 10 (specifically, the upper surface of the motor 16).

[0040] The tool unit 20 has a pair of heads 22 as tools, each head 22 being rotatable about an axis 23. Additionally, an elongated cylindrical cylinder (not shown) is provided inside the tool unit 20. When working oil is supplied from the oil chamber of the hydraulic pump to the tools of the tool unit 20, the piston member is pushed towards the head 22, thereby causing each head 22 to rotate about the axis 23. Figure 1 Rotating in the direction indicated by the arrow increases the distance between the tips of the pair of heads 22. Thus, after clamping each head 22 into the gap of the object to be pried open by the tool unit 20, working oil is supplied from the oil chamber of the hydraulic pump to the tool of the tool unit 20 to increase the distance between the heads 22, thereby widening the gap in the object. Furthermore, the tool unit 20 is provided with a handle 26 and a switching lever 28 for the operator to hold. While holding the handle 26, the operator uses their fingers to rotate the switching lever 28, thereby changing the rotation direction of each head 22 about the axis 23 when supplying working oil from the oil chamber of the hydraulic pump to the tool of the tool unit 20.

[0041] The connecting locking mechanism 30 is used to connect the tool unit 20 to the drive unit 10, allowing it to be rotatably mounted relative to the drive unit 10. Furthermore, when the tool unit 20 is connected to the drive unit 10 via the connecting locking mechanism 30, a hydraulic pump supplies working oil to the tool, enabling it to operate. Specifically, when the drive unit 10 and the tool unit 20 are separated, pressing the tool unit 20 into the connecting locking mechanism 30 connects and locks the tool unit 20 to the drive unit 10. In this locked state, the tool unit 20 cannot be removed from the drive unit 10. Additionally, when the tool unit 20 is connected and locked to the drive unit 10 using the connecting locking mechanism 30, if the tool unit 20 is further pressed into the connecting locking mechanism 30, the locking state of the connecting locking mechanism 30 is released, allowing the tool unit 20 to be removed from the drive unit 10.

[0042] use Figures 5 to 7 The detailed structure of this connection locking mechanism 30 will be described below. For example... Figures 5 to 7 As shown, the connecting locking mechanism 30 is generally cylindrical in shape, and a first edge portion 36 and a second edge portion 38 are formed on the outer periphery of the driving unit 10 side of the connecting locking mechanism 30. Furthermore, a step 39 is formed between the first edge portion 36 and the second edge portion 38. Here, as... Figure 5 and Figure 6 As shown, a step 39 is formed on the side of the second edge portion 38 that is closer to the drive unit 10 than the first edge portion 36. Furthermore, a first protrusion 34 is formed on the first edge portion 36, and a second protrusion 32 is formed on the second edge portion 38. In this embodiment, by combining these first protrusions 34 and second protrusions 32, a limiting member is constructed to restrict the area where the connecting locking mechanism 30 can rotate relative to the drive unit 10.

[0043] In this embodiment, the first protrusion 34 and the second protrusion 32 are configured such that when the connecting locking mechanism 30 rotates relative to the drive unit 10, it abuts against the protrusion 18 of the drive unit 10, preventing the connecting locking mechanism 30 from rotating further. In other words, assuming that the first protrusion 34 and the second protrusion 32 are not provided, the connecting locking mechanism 30 can rotate 360° relative to the drive unit 10. However, in reality, by providing the first protrusion 34 and the second protrusion 32, when the connecting locking mechanism 30 rotates relative to the drive unit 10, these first protrusions 34 and the second protrusion 32 engage with the protrusion 18, thereby preventing the connecting locking mechanism 30 from rotating 360° relative to the drive unit 10. Specifically, the connecting locking mechanism 30 can rotate within a specified range smaller than 180° relative to the drive unit 10, specifically approximately 120° to 150°. Here, as... Figure 5 As shown, when the second protrusion 32 of the connecting locking mechanism 30 abuts or approaches the convex portion 18 of the drive unit 10, the second edge portion 38 faces the convex portion 18 of the drive unit 10. On the other hand, when the first protrusion 34 of the connecting locking mechanism 30 abuts or approaches the convex portion 18 of the drive unit 10, the first edge portion 36 faces the convex portion 18 of the drive unit 10.

[0044] In addition, in this embodiment, the connection locking mechanism 30 is moved from... Figure 5 In the state shown, the tool unit 20 rotates relative to the drive unit 10. When the first edge portion 36 of the connecting locking mechanism 30 is opposite to the protrusion 18 of the drive unit 10, the connection between the tool unit 20 and the drive unit 10 can be released by pressing the connecting locking mechanism 30 toward the drive unit 10. On the other hand, as Figure 5As shown, when the second edge portion 38 of the connecting locking mechanism 30 is opposite to the protrusion 18 of the drive unit 10, the connecting locking mechanism 30 cannot be pressed towards the drive unit 10 to the extent that the connection between the tool unit 20 and the drive unit 10 is released. More specifically, as Figure 5 As shown, when the second edge portion 38 of the connecting locking mechanism 30 is opposite to the protrusion 18 of the drive unit 10, the second edge portion 38 of the connecting locking mechanism 30 contacts or approaches the protrusion 18 of the drive unit 10, thus preventing the connecting locking mechanism 30 from being pulled away from the drive unit 10. Figure 5 The state shown indicates that the device is pressed towards the drive unit 10. On the other hand, the connection locking mechanism 30 is released from... Figure 5 When the state shown is rotated relative to the drive unit 10, and the first edge portion 36 of the connecting locking mechanism 30 is opposite to the protrusion 18 of the drive unit 10, the connecting locking mechanism 30 can be pressed towards the drive unit 10 by at least the height of the step 39. Thus, when the connecting locking mechanism 30 is pressed towards the drive unit 10, the lock of the connecting locking mechanism 30 on the drive unit 10 and the tool unit 20 is released, and the tool unit 20 can be detached from the drive unit 10.

[0045] Furthermore, in this embodiment, the height of the first protrusion 34 relative to the first edge portion 36 is greater than the height of the step 39 formed between the first edge portion 36 and the second edge portion 38. In this case, the top of the first protrusion 34 is located closer to the drive unit 10 than the second edge portion 38. Additionally, as... Figure 6 As shown, the length of the first edge portion 36 along the outer periphery of the drive unit 10 side in the connection locking mechanism 30 is greater than the length of the second edge portion 38. Furthermore, the length between the first protrusion 34 and the step 39 along the outer periphery of the drive unit 10 side in the connection locking mechanism 30 is approximately the same as the length of the convex portion 18 along the outer periphery of the drive unit 10. In this case, unless the connection locking mechanism 30 is rotated relative to the drive unit 10 to bring the convex portion 18 of the drive unit 10 into contact with the first protrusion 34 of the connection locking mechanism 30, it is impossible to press the connection locking mechanism 30 towards the drive unit 10 side. Therefore, the rotation phase of the connection locking mechanism 30 when the lock between the drive unit 10 and the tool unit 20 is released can be limited, preventing the accidental release of the lock between the drive unit 10 and the tool unit 20 and the tool unit 20 from disengaging from the drive unit 10.

[0046] Next, the operation of the hydraulic working device constructed with such a structure will be explained.

[0047] First, the operation of installing the tool unit 20 onto the drive unit 10 will be described. When installing the tool unit 20 onto the drive unit 10, the tool unit 20 is pressed into the connection locking mechanism 30 installed on the drive unit 10. Thus, the tool unit 20 is locked to the drive unit 10 via the connection locking mechanism 30. When the tool unit 20 is locked to the drive unit 10, it cannot be removed from the drive unit 10. After the tool unit 20 is connected to and locked to the drive unit 10 via the connection locking mechanism 30, if the operator holds the handle 14 and presses the switch provided on the handle 14 with their finger, power is supplied from the battery 12 to the motor 16, which drives the hydraulic pump, thereby supplying working oil from the oil chamber of the hydraulic pump to the tool of the tool unit 20. After clamping each head 22 into the gap of the object to be pried open by the tool unit 20, the working oil is supplied from the oil chamber of the hydraulic pump to the tool of the tool unit 20, increasing the distance between the heads 22, thereby widening the gap of the object.

[0048] Next, the actions of detaching the tool unit 20 from the drive unit 10 will be described. Figure 1 , Figure 5 As shown, when the second edge portion 38 of the connecting locking mechanism 30 is opposite to the protruding portion 18 of the driving unit 10, as described above, the second edge portion 38 of the connecting locking mechanism 30 contacts or approaches the protruding portion 18 of the driving unit 10, therefore it is impossible to... Figure 1 , Figure 5 The state shown indicates that the connection locking mechanism 30 is pressed towards the drive unit 10. On the other hand, even when the operator cannot see the status at hand or is working in the dark, the connection locking mechanism 30 can be pressed from the drive unit 10. Figure 5 In the indicated state, the connection locking mechanism 30 is rotated relative to the drive unit 10, causing the first protrusion 34 of the connection locking mechanism 30 to contact the protrusion 18 of the drive unit 10. When the first edge portion 36 of the connection locking mechanism 30 is opposite the protrusion 18 of the drive unit 10, the connection locking mechanism 30 can be pressed towards the drive unit 10 by at least the height of the step 39. When the connection locking mechanism 30 is pressed towards the drive unit 10 in this way, the lock of the connection locking mechanism 30 on the drive unit 10 and the tool unit 20 is released, allowing the tool unit 20 to be detached from the drive unit 10.

[0049] According to the connection locking mechanism 30 and hydraulic working device of this embodiment, which are configured as described above, the connection locking mechanism 30 is used to connect the tool unit 20 with the tool to the drive unit 10. The drive unit 10 has a motor 16 that drives a hydraulic pump to supply working oil to the tool unit 20. The connection locking mechanism 30 is mounted in a manner that allows it to rotate relative to the drive unit 10. When the tool unit 20 is connected to the drive unit 10 using the connection locking mechanism 30, the hydraulic pump supplies working oil to the tool, thereby enabling the tool to work. In addition, a protrusion 18 is provided on the outer peripheral surface of the drive unit 10. The connection locking mechanism 30 is configured such that when the connection between the tool unit 20 and the drive unit 10 is in a locked state, it is pressed towards the drive unit 10 to release the connection between the tool unit 20 and the drive unit 10. Furthermore, a first edge portion 36 and a second edge portion 38 are formed on the outer periphery of the drive unit 10 side of the connecting locking mechanism 30. A step 39 is formed between the first edge portion 36 and the second edge portion 38. When the first edge portion 36 of the connecting locking mechanism 30 is opposite to the protrusion 18 of the drive unit 10, the connecting locking mechanism 30 can be pressed toward the drive unit 10 to release the connection between the tool unit 20 and the drive unit 10. When the second edge portion 38 of the connecting locking mechanism 30 is opposite to the protrusion 18 of the drive unit 10, the connecting locking mechanism 30 cannot be pressed toward the drive unit 10 to the extent that the connection between the tool unit 20 and the drive unit 10 is released. According to this connection locking mechanism 30 and hydraulic working device, by rotating the connection locking mechanism 30 relative to the drive unit 10, the first edge portion 36 of the connection locking mechanism 30 is brought into contact with the protrusion 18 of the drive unit 10. This allows the connection locking mechanism 30 to be pressed towards the drive unit 10, thereby releasing the lock of the connection locking mechanism 30 on the drive unit 10 and the tool unit 20, and enabling the tool unit 20 to be removed from the drive unit 10. In this way, the installation and removal of the drive unit 10 and the tool unit 20 can be performed safely and reliably.

[0050] Furthermore, in the connection locking mechanism 30 and the hydraulic working device of this embodiment, as described above, the connection locking mechanism 30 may also be generally cylindrical in shape. In this case, the connection locking mechanism 30 can rotate smoothly relative to the drive unit 10.

[0051] Furthermore, in the connection locking mechanism 30 and the hydraulic working device of this embodiment, as described above, a limiting member may also be provided to restrict the area in which the connection locking mechanism 30 can rotate relative to the drive unit 10. In this case, the connection locking mechanism 30 will not rotate 360° relative to the drive unit 10. Therefore, even when the operator cannot see the situation at hand or is working in the dark, the operator's workability can be improved when rotating the connection locking mechanism 30 relative to the drive unit 10 in order to detach the tool unit 20 from the drive unit 10.

[0052] Furthermore, in the connection locking mechanism 30 and the hydraulic working device of this embodiment, as described above, the limiting member has a first protrusion 34 provided on the first edge portion 36 and a second protrusion 32 provided on the second edge portion 38. The first protrusion 34 and the second protrusion 32 are configured such that when the connection locking mechanism 30 is rotated relative to the drive unit 10, it abuts against the protrusion 18 of the drive unit 10, preventing the connection locking mechanism 30 from rotating further. In this case, the area in which the connection locking mechanism 30 can rotate relative to the drive unit 10 can be limited by the first protrusion 34 and the second protrusion 32.

[0053] Furthermore, in the connection locking mechanism 30 and the hydraulic working device of this embodiment, as described above, the connection locking mechanism 30 can be pressed towards the drive unit 10 until the connection between the tool unit 20 and the drive unit 10 is released, only when the first protrusion 34 abuts or approaches the protrusion 18 of the drive unit 10. In this case, if the connection locking mechanism 30 is not rotated relative to the drive unit 10 to abut or approach the protrusion 18 of the drive unit 10, the connection locking mechanism 30 cannot be pressed towards the drive unit 10. Therefore, even if the operator cannot see the situation at hand and is working in the dark, the tool unit 20 can be removed from the drive unit 10 by rotating the connection locking mechanism 30 relative to the drive unit 10 to abut or approach the protrusion 18 of the drive unit 10.

[0054] Furthermore, in the connection locking mechanism 30 and hydraulic operating device of this embodiment, as described above, the height of the first protrusion 34 relative to the first edge portion 36 is greater than the height of the step 39 formed between the first edge portion 36 and the second edge portion 38. In this case, the top of the first protrusion 34 can be positioned closer to the drive unit 10 than the second edge portion 38. Therefore, the area in which the connection locking mechanism 30 can rotate relative to the drive unit 10 can be reliably limited by the first protrusion 34.

[0055] Furthermore, in the connection locking mechanism 30 and the hydraulic working device of this embodiment, as described above, the length between the first protrusion 34 and the step 39 along the outer periphery of the drive unit 10 side of the connection locking mechanism 30 is approximately the same as the length of the convex portion 18 along the outer periphery of the drive unit 10. In this case, the rotation phase of the connection locking mechanism 30 when it is pressed towards the drive unit 10 side is limited, thus preventing the accidental release of the lock between the drive unit 10 and the tool unit 20 and the tool unit 20 from disengaging from the drive unit 10.

[0056] Furthermore, in the connection locking mechanism 30 and the hydraulic working device of this embodiment, as described above, the length of the first edge portion 36 along the outer periphery of the connection locking mechanism 30 on the drive unit 10 side is greater than the length of the second edge portion 38. In this case, the length of the second edge portion 38 along the outer periphery of the connection locking mechanism 30 on the drive unit 10 side is relatively small, thus limiting the rotation phase of the connection locking mechanism 30 when it is pressed towards the drive unit 10 side. Therefore, it is possible to prevent the drive unit 10 from being accidentally released from the lock between the drive unit 10 and the tool unit 20, causing the tool unit 20 to detach from the drive unit 10.

[0057] Furthermore, the connection locking mechanism 30 and the hydraulic working device in this embodiment are not limited to the form described above, and various modifications can be made.

[0058] For example, the limiting member for restricting the area where the connecting locking mechanism 30 can rotate relative to the drive unit 10 is not limited to a structure combining the first protrusion 34 and the second protrusion 32. As a limiting member for restricting the area where the connecting locking mechanism 30 can rotate relative to the drive unit 10, only either the first protrusion 34 or the second protrusion 32 may be provided. Alternatively, as another limiting member, protrusions or recesses may be provided on the inner circumferential surface of the cylindrical connecting locking mechanism 30, and recesses or protrusions corresponding to these protrusions or recesses may be provided on the outer circumferential surface of the motor 16 of the drive unit 10, thereby restricting the area where the connecting locking mechanism 30 can rotate relative to the drive unit 10. Thus, various structures other than those shown in the figure can be used as limiting members.

[0059] Furthermore, the tool unit 20 of this embodiment is not limited to having the pair of heads 22 described above. As the tool unit 20, various other tool units with different structures can be used as long as they have a tool that operates by working oil supplied from a hydraulic pump driven by a motor 16 of the drive unit 10.

Claims

1. A connection locking mechanism, characterized in that, The connection locking mechanism is generally cylindrical in shape and is used to connect a tool unit with tools to a drive unit. The drive unit has a motor that drives a hydraulic pump to supply working oil to the tools in the tool unit. The connection locking mechanism is mounted in a manner that allows it to rotate relative to the drive unit. When the tool unit is connected to the drive unit using the connection locking mechanism, the hydraulic pump supplies working oil to the tool, thereby enabling the tool to operate. A protruding portion is provided on the outer peripheral surface of the end of the drive unit, extending radially outward from the end. The connection locking mechanism is configured such that, when the tool unit and the drive unit are in a locked state, the connection between the tool unit and the drive unit is released by pressing it towards the drive unit side. A first edge portion and a second edge portion are formed on the outer periphery of the end of the connection locking mechanism on the drive unit side. The first edge portion and the second edge portion extend circumferentially along the connection locking mechanism in a plane intersecting the central axis of the generally cylindrical shape of the connection locking mechanism. A step is formed between the first edge portion and the second edge portion. When the first edge portion of the connection locking mechanism is opposite to the convex portion of the drive unit, the connection locking mechanism can be pressed towards the drive unit side to release the connection between the tool unit and the drive unit. When the second edge portion of the connection locking mechanism is opposite to the convex portion of the drive unit, the connection locking mechanism cannot be pressed towards the drive unit side to the extent that the connection between the tool unit and the drive unit is released.

2. The connection locking mechanism according to claim 1, characterized in that, The connection locking mechanism also includes a limiting member for limiting the area in which the connection locking mechanism can rotate relative to the drive unit.

3. The connection locking mechanism according to claim 2, characterized in that, The limiting member has a first protrusion disposed on the first edge portion and a second protrusion disposed on the second edge portion. The first protrusion and the second protrusion are configured such that when the connection locking mechanism is rotated relative to the drive unit, the connection locking mechanism is prevented from rotating further by abutting against the convex portion of the drive unit.

4. The connection locking mechanism according to claim 3, characterized in that, The connection locking mechanism can be pressed toward the drive unit side to the extent that the connection between the tool unit and the drive unit is released only when the first protrusion abuts or approaches the convex portion of the drive unit.

5. The connection locking mechanism according to claim 3, characterized in that, The height of the first protrusion relative to the first edge portion is greater than the height of the step formed between the first edge portion and the second edge portion.

6. The connection locking mechanism according to claim 3, characterized in that, The length between the first protrusion along the outer periphery of the drive unit side and the step in the connection locking mechanism is approximately the same as the length of the convex portion along the outer periphery of the drive unit.

7. The connection locking mechanism according to claim 1, characterized in that, The length of the first edge portion along the outer periphery of the drive unit side in the connection locking mechanism is greater than the length of the second edge portion.

8. A hydraulic working device, characterized in that, This hydraulic working device has the following features: A tool unit, which has tools; A drive unit having a motor that drives a hydraulic pump for supplying working oil to the tools of the tool unit; as well as A generally cylindrical connecting and locking mechanism, mounted in a rotatable manner relative to the drive unit, is used to connect the tool unit to the drive unit. When the tool unit is connected to the drive unit using the connection locking mechanism, the hydraulic pump supplies working oil to the tool, thereby enabling the tool to operate. A protruding portion is provided on the outer peripheral surface of the end of the drive unit, extending radially outward from the end. The connection locking mechanism is configured such that, when the tool unit and the drive unit are in a locked state, the connection between the tool unit and the drive unit is released by pressing it towards the drive unit side. A first edge portion and a second edge portion are formed on the outer periphery of the end of the connection locking mechanism on the drive unit side. The first edge portion and the second edge portion extend circumferentially along the connection locking mechanism in a plane intersecting the central axis of the generally cylindrical shape of the connection locking mechanism. A step is formed between the first edge portion and the second edge portion. When the first edge portion of the connection locking mechanism is opposite to the convex portion of the drive unit, the connection locking mechanism can be pressed towards the drive unit side to release the connection between the tool unit and the drive unit. When the second edge portion of the connection locking mechanism is opposite to the convex portion of the drive unit, the connection locking mechanism cannot be pressed towards the drive unit side to the extent that the connection between the tool unit and the drive unit is released.

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