Hydraulic Hand Tools

Abstract

The utility model proposes a hydraulic hand tool, which has a first oil return channel, a second oil return channel and an oil return control mechanism. Hydraulic oil can perform an oil return stroke through the first oil return channel and the second oil return channel. The oil return control mechanism has a control pipeline, a blocking element, an elastic member, a drive assembly and a control module. The control pipeline connects the first oil return channel and the second oil return channel, the blocking element is arranged in the control pipeline, and the elastic member pushes the blocking element to block the control pipeline, thereby blocking the first oil return channel and the second oil return channel. The drive assembly is started by the control module, and can make the blocking element resist the elastic member and move, thereby connecting the first oil return channel and the second oil return channel. The user only needs to set the control module first, and then he can operate the hydraulic hand tool and fix the oil return amount of each oil return stroke.

Description

Technical Field

[0001] The utility model relates to an oil return mechanism, in particular to an oil return mechanism for hydraulic hand tools. Background Art

[0002] The hydraulic hand tool of the prior art comprises an oil storage space, a driving assembly, and a piston assembly. The driving assembly extracts the hydraulic oil in the oil storage space and pressurizes it into the piston assembly, thereby pushing the piston to achieve functions such as clamping or squeezing objects.

[0003] When the piston gradually moves to the object, the oil pressure inside the piston assembly will gradually increase with the gradual squeezing. When the pressure is greater than the set threshold, the safety valve of the hydraulic hand tool will be pushed open by the pressure, allowing a small amount of hydraulic oil to flow back to the oil storage space, thereby maintaining the oil pressure inside the piston assembly at a certain pressure value.

[0004] If a large amount of hydraulic oil needs to be actively returned to the oil storage space, the user must continue to press the oil discharge lever to allow the hydraulic oil to flow from the piston assembly back to the oil storage space. However, this operation not only makes the user feel inconvenient, but also controls the return time by the user, which also makes it impossible to fix the amount of oil returned each time. Utility Model Content

[0005] The utility model provides a hydraulic hand tool, which can control the movement of hydraulic oil contained inside, and further control the hydraulic hand tool to achieve the function of clamping or releasing an object.

[0006] The hydraulic hand tool proposed by the utility model has:

[0007] a first oil storage space, in which hydraulic oil can be accommodated;

[0008] A piston assembly is disposed spaced apart from the first oil storage space and comprises:

[0009] an oil inlet passage connected to the first oil storage space;

[0010] a second oil storage space connected to the oil inlet passage, and the hydraulic oil can enter the second oil storage space from the first oil storage space through the oil inlet passage;

[0011] a first oil return passage, which is connected to the second oil storage space, and the hydraulic oil can enter the first oil return passage from the second oil storage space;

[0012] a second oil return passage, which is connected to the first oil return passage and the first oil storage space, and the hydraulic oil can enter the first oil storage space from the first oil return passage through the second oil return passage;

[0013] An oil return control mechanism, which can connect or block the first oil return passage and the second oil return passage, and the oil return control mechanism has:

[0014] a control pipeline connecting the first oil return channel and the second oil return channel;

[0015] a blocking element, which is disposed in the control pipe and selectively blocks or connects the first oil return passage and the second oil return passage;

[0016] an elastic member, which pushes against the blocking element and tends to make the blocking element block the first oil return channel and the second oil return channel;

[0017] a driving assembly connected to the blocking element, the driving assembly enabling the blocking element to resist the elastic member and connecting the first oil return passage and the second oil return passage;

[0018] A control module is connected to the driving component signal and controls the driving component to resist the elastic member for a preset time.

[0019] The advantage of the present invention is that the start and stop of the oil return stroke are both set by the control module and started by the drive component. The user only needs to press the oil return button once and start the control module. The drive component is controlled by the control module and performs the oil return operation for a preset time. When the operation time set by the user is completed, the control module controls the drive component to turn away from the connecting rod mechanism, so that the blocking element loses the force to resist the elastic member, allowing the elastic member to push the blocking element to move to block the first oil return channel and the second oil return channel. In other words, the user does not need to continuously manually control the oil return stroke, but only needs to set the control module in advance to easily operate the hydraulic hand tool and fix the oil return amount of each oil return stroke.

[0020] As in the hydraulic hand tool mentioned above, wherein the elastic member tends to push the blocking element toward the second oil return channel.

[0021] As in the hydraulic hand tool mentioned above, wherein the elastic member tends to push the blocking element toward the first oil return channel.

[0022] A hydraulic hand tool as described above, wherein:

[0023] The drive assembly has:

[0024] a motor;

[0025] A connecting rod mechanism having a first end and a second end; the first end is connected to the motor, and the second end is connected to the blocking element;

[0026] The motor drives the connecting rod mechanism, and the connecting rod mechanism drives the blocking element to resist the elastic member and move away from the second oil return channel, thereby connecting the first oil return channel and the second oil return channel.

[0027] As the hydraulic hand tool mentioned above, wherein the connecting rod mechanism has:

[0028] A fulcrum, wherein a distance from the fulcrum to the first end is greater than a distance from the fulcrum to the second end.

[0029] As the hydraulic hand tool above, wherein the motor has:

[0030] a cam, the first end of the connecting rod mechanism is selectively connected to the cam, whereby the cam selectively drives the first end of the connecting rod mechanism;

[0031] When the cam drives the first end of the link mechanism, the second end of the link mechanism drives the blocking element.

[0032] A hydraulic hand tool as described above, wherein:

[0033] The drive assembly has:

[0034] a motor;

[0035] A connecting rod mechanism having a first end and a second end; the first end is connected to the motor, and the second end is connected to the blocking element;

[0036] The motor drives the connecting rod mechanism, and the connecting rod mechanism can drive the blocking element to resist the elastic member and move away from the first oil return channel, thereby connecting the first oil return channel and the second oil return channel.

[0037] A hydraulic hand tool as described above, wherein:

[0038] The control pipe has a plurality of holes, the holes are formed on the wall of the control pipe, and the holes are connected to the first oil return channel and the second oil return channel;

[0039] The elastic member tends to push the blocking element between the first oil return passage and the hole, and blocks the first oil return passage and the hole;

[0040] The connecting rod mechanism can drive the blocking element and make the blocking element resist the elastic member and stay away from the first oil return channel and the hole, thereby connecting the first oil return channel and the second oil return channel.

[0041] As the hydraulic hand tool mentioned above, wherein the control pipeline has:

[0042] a first pipe connected to the first oil return channel, wherein the hole is formed on the wall of the first pipe; the blocking element is disposed in the first pipe;

[0043] A second pipeline is connected to the second oil return channel, and the second pipeline is sleeved on the first pipeline.

[0044] As the hydraulic hand tool above, wherein the motor has:

[0045] a cam, the first end of the connecting rod mechanism is selectively connected to the cam, whereby the cam selectively drives the first end of the connecting rod mechanism;

[0046] When the cam drives the first end of the link mechanism, the second end of the link mechanism drives the blocking element. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a three-dimensional schematic diagram of the first embodiment of the utility model.

[0048] Figure 2 It is a cross-sectional schematic diagram of the first embodiment of the present invention.

[0049] Figure 3 It is a partial cross-sectional schematic diagram of the first embodiment of the utility model.

[0050] Figure 4 It is a partial cross-sectional schematic diagram of another viewing angle of the first embodiment of the utility model.

[0051] Figure 5 It is a three-dimensional schematic diagram of the second embodiment of the present invention.

[0052] Figure 6 It is a cross-sectional schematic diagram of the second embodiment of the present invention.

[0053] Figure 7 It is a cross-sectional schematic diagram of the second embodiment of the present invention from another viewing angle.

[0054] Figure 8 It is a partial cross-sectional schematic diagram of another viewing angle of the second embodiment of the present invention.

[0055] Fig. 9 It is a partial cross-sectional schematic diagram of another viewing angle of the second embodiment of the present invention.

[0056] Explanation of symbols

[0057] A: Hydraulic hand tools

[0058] B: Hydraulic hand tools

[0059] 10: The first oil storage space

[0060] 20: Piston assembly

[0061] 21: Piston

[0062] 22: Second oil storage space

[0063] 23: Oil inlet channel

[0064] 31: First oil return channel

[0065] 32: Second oil return channel

[0066] 40: Oil return control mechanism

[0067] 50: Control pipeline

[0068] 51: Neck section

[0069] 52: First Pipeline

[0070] 53: Second pipeline

[0071] 54: Holes

[0072] 60: blocking element

[0073] 70: Elastic parts

[0074] 80: Drive components

[0075] 81: Motor

[0076] 82: Connecting rod mechanism

[0077] 821: First End

[0078] 822: Second End

[0079] 823: Fulcrum

[0080] 83: Cam DETAILED DESCRIPTION

[0081] Please refer to Figures 1 to 4 The utility model discloses a hydraulic hand tool, which can contain hydraulic oil, and through the movement of the hydraulic oil in the pipeline inside the hydraulic hand tool, the hydraulic hand tool can achieve the functions of clamping or squeezing objects. The hydraulic hand tool has a first oil storage space 10, a piston assembly 20, a first oil return channel 31, a second oil return channel 32 and an oil return control mechanism 40.

[0082] The first oil storage space 10 can contain hydraulic oil. The piston assembly 20 has a piston 21, a second oil storage space 22 and an oil inlet passage 23. The second oil storage space 22 is disposed in the piston 21. The second oil storage space 22 is spaced apart from the first oil storage space 10, and the oil inlet passage 23 connects the first oil storage space 10 and the second oil storage space 22, so that the hydraulic oil can enter the second oil storage space 22 from the first oil storage space 10 through the oil inlet passage 23 and push the piston 21. The first oil return passage 31 connects the second oil storage space 22, and the second oil return passage 32 connects the first oil return passage 31 and the first oil storage space 10. In other words, the first oil return passage 31 and the second oil return passage 32 connect the second oil storage space 22 and the first oil storage space 10. The hydraulic oil can enter the first oil storage space 10 from the second oil storage space 22 through the first oil return passage 31 and the second oil return passage 32 in sequence.

[0083] The oil return control mechanism 40 can connect or block the first oil return channel 31 and the second oil return channel 32, and the oil return control mechanism 40 can include a control pipe 50, a blocking element 60, an elastic member 70, a drive assembly 80, and a control module (not shown). The control pipe 50 connects the first oil return channel 31 and the second oil return channel 32, and the blocking element 60 is disposed in the control pipe 50 and can selectively block the control pipe 50, thereby blocking or connecting the first oil return channel 31 and the second oil return channel 32. The elastic member 70 pushes against the blocking element 60, and in the first embodiment, the elastic member 70 tends to push the blocking element 60 toward the second oil return channel 32, and tends to make the blocking element 60 block the first oil return channel 31 and the second oil return channel 32. Specifically, there is a narrower necking section 51 in the control pipe 50, and the components / structures are the elastic member 70, the blocking element 60, the necking section 51, and the second oil return channel 32 in sequence. Therefore, when the elastic member 70 pushes the blocking element 60 toward the second oil return passage 32 , the blocking element 60 abuts against the necked section 51 to block the control pipe 50 .

[0084] The driving assembly 80 is connected to the blocking element 60, and the driving assembly 80 can make the blocking element 60 resist the elastic member 70 to move the blocking element 60, and make the first oil return channel 31 and the second oil return channel 32 communicate. The driving assembly 80 has a motor 81 and a connecting rod mechanism 82. The motor 81 has a cam 83, which is arranged on the rotating shaft of the motor 81 and can rotate with the rotating shaft. The connecting rod mechanism 82 has a first end 821, a second end 822 and a fulcrum 823. The first end 821 is selectively connected to the cam 83 of the motor 81, and the second end 822 is connected to the blocking element 60. The motor 81 drives the cam 83 to drive the first end 821 of the connecting rod mechanism 82, and the second end 822 of the connecting rod mechanism 82 drives the blocking element 60 to resist the elastic member 70, and makes the blocking element 60 away from the second oil return channel 32 to open the necking section 51, thereby connecting the first oil return channel 31 and the second oil return channel 32. In this embodiment, the fulcrum 823 is located between the first end 821 and the second end 822, and the distance from the fulcrum 823 to the first end 821 is greater than the distance from the fulcrum 823 to the second end 822. Thus, through the connecting rod mechanism 82, the force applied by the motor 81 driving the cam 83 is greater than the force applied to the blocking element 60.

[0085] The control module can be a processor, and the control module is connected to the drive assembly 80 by signal, and can control the angle and time of the cam 83 to rotate, thereby controlling the blocking element 60 to connect or block the first oil return channel 31 and the second oil return channel 32. When the user presses the oil return key (not shown), the control module activates the drive assembly 80 to connect the first oil return channel 31 and the second oil return channel 32.

[0086] When the hydraulic oil enters the second oil storage space 22 from the first oil storage space 10 through the oil inlet channel 23, the pressure of the second oil storage space 22 increases and pushes the piston 21, so that the hydraulic hand tool can clamp or squeeze the object. When the hydraulic hand tool completes clamping or squeezing, the control module controls the motor 81 of the drive assembly 80 for a preset time. Specifically, when the user presses the oil return button, the control module controls the motor 81 of the drive assembly 80, and the motor 81 rotates the cam 83 until the cam 83 contacts and drives the first end 821 of the connecting rod mechanism 82. When the preset time ends, the motor 81 rotates the cam 83 until the cam 83 rotates away from the connecting rod mechanism 82.

[0087] When the cam 83 drives the first end 821 of the connecting rod mechanism 82, the second end 822 of the connecting rod mechanism 82 drives the blocking element 60 to resist the elastic member 70 and move. In this way, the blocking element 60 moves away from the second oil return channel 32 during the preset time to open the necking section 51 and connect the first oil return channel 31 and the second oil return channel 32. When the hydraulic oil enters the first oil storage space 10 from the second oil storage space 22 through the first oil return channel 31 and the second oil return channel 32, the pressure of the second oil storage space 22 decreases and the piston 21 returns to its original position, so that the hydraulic hand tool releases the object. When the cam 83 turns away from the connecting rod mechanism 82, the blocking element 60 loses the force to resist the elastic member 70, allowing the elastic member 70 to push the blocking element 60 to move to block the first oil return channel 31 and the second oil return channel 32. The user sets the preset time for the cam 83 to drive the connecting rod mechanism 82, thereby controlling the oil return amount of the hydraulic oil, and then controlling the degree to which the hydraulic hand tool releases the object.

[0088] Please refer to Figures 5 to 9 The hydraulic hand tool in the second embodiment is similar to the hydraulic hand tool in the first embodiment, except that the control pipe 50 further comprises a first pipe 52, a second pipe 53 and a plurality of holes 54. The first pipe 52 is inserted into the second pipe 53, and a gap is formed between the first pipe 52 and the second pipe 53. The end of the first pipe 52 is connected to the first oil return channel 31, and the second pipe 53 is connected to the second oil return channel 32, and specifically, the second oil return channel 32 is connected to the gap between the first pipe 52 and the second pipe 53. The hole 54 is formed on the wall of the first pipe 52, and connects the inside of the first pipe 52 and the gap between the first pipe 52 and the second pipe 53. The blocking element 60 is disposed in the first pipe 52 and fits closely with the inner wall of the first pipe 52, and the elastic member 70 tends to push the blocking element 60 between the first oil return channel 31 and the hole 54 to block the first oil return channel 31 and the hole 54, and in the second embodiment, the first oil return channel 31 and the second oil return channel 32 are also blocked. When the motor 81 drives the cam 83 to drive the first end 821 of the connecting rod mechanism 82, the second end 822 of the connecting rod mechanism 82 drives the blocking element 60 to resist the elastic member 70, and the blocking element 60 is moved away from the first oil return channel 31, thereby connecting the first oil return channel 31 and the hole 54, so that the hydraulic oil passes through the first pipe 52, the hole 54 and the second pipe 53 from the first oil return channel 31 to the second oil return channel 32 in sequence.

[0089] The advantage of the present invention is that the start and stop of the oil return stroke are both set by the control module and started by the drive assembly 80. The user only needs to press the oil return key once and start the control module. The drive assembly 80 is controlled by the control module to perform the oil return operation for a preset time. When the operation time set by the user is completed, the control module controls the drive assembly 80 to turn the cam 83 away from the connecting rod mechanism 82, so that the blocking element 60 loses the force to resist the elastic member 70, allowing the elastic member 70 to push the blocking element 60 to move to block the first oil return channel 31 and the second oil return channel 32. In other words, the user does not need to continuously manually control the oil return stroke, but only needs to set the control module in advance to easily operate the hydraulic hand tool and fix the oil return amount of each oil return stroke.

[0090] The above description is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hydraulic hand tool, characterized in that: have: a first oil storage space, in which hydraulic oil can be accommodated; A piston assembly is spaced apart from the first oil storage space and comprises: an oil inlet passage connected to the first oil storage space; a second oil storage space connected to the oil inlet passage, and the hydraulic oil can enter the second oil storage space from the first oil storage space through the oil inlet passage; a first oil return passage, which is connected to the second oil storage space, and the hydraulic oil can enter the first oil return passage from the second oil storage space; a second oil return passage, which is connected to the first oil return passage and the first oil storage space, and the hydraulic oil can enter the first oil storage space from the first oil return passage through the second oil return passage; An oil return control mechanism, which can connect or block the first oil return passage and the second oil return passage, and the oil return control mechanism has: a control pipeline connecting the first oil return channel and the second oil return channel; a blocking element, which is disposed in the control pipe and selectively blocks or connects the first oil return passage and the second oil return passage; an elastic member, which pushes against the blocking element and tends to make the blocking element block the first oil return channel and the second oil return channel; a driving assembly connected to the blocking element, the driving assembly enabling the blocking element to resist the elastic member and connecting the first oil return passage and the second oil return passage; A control module is connected to the driving component signal and controls the driving component to resist the elastic member for a preset time.

2. The hydraulic hand tool according to claim 1, characterized in that The elastic member tends to push the blocking element toward the second oil return passage.

3. The hydraulic hand tool according to claim 1, characterized in that The elastic member tends to push the blocking element toward the first oil return passage.

4. The hydraulic hand tool according to claim 1 or 2, characterized in that: The drive assembly has: a motor; A connecting rod mechanism having a first end and a second end; the first end is connected to the motor, and the second end is connected to the blocking element; The motor drives the connecting rod mechanism, and the connecting rod mechanism drives the blocking element to resist the elastic member and move away from the second oil return channel, thereby connecting the first oil return channel and the second oil return channel.

5. The hydraulic hand tool according to claim 4, characterized in that The linkage mechanism has: A fulcrum, wherein a distance from the fulcrum to the first end is greater than a distance from the fulcrum to the second end.

6. The hydraulic hand tool according to claim 5, characterized in that The motor has: a cam, the first end of the connecting rod mechanism is selectively connected to the cam, whereby the cam selectively drives the first end of the connecting rod mechanism; When the cam drives the first end of the link mechanism, the second end of the link mechanism drives the blocking element.

7. The hydraulic hand tool according to claim 1 or 3, characterized in that: The drive assembly has: a motor; A connecting rod mechanism having a first end and a second end; the first end is connected to the motor, and the second end is connected to the blocking element; The motor drives the connecting rod mechanism, and the connecting rod mechanism can drive the blocking element to resist the elastic member and move away from the first oil return channel, thereby connecting the first oil return channel and the second oil return channel.

8. The hydraulic hand tool according to claim 7, characterized in that The control pipe has a plurality of holes, the holes are formed on the wall of the control pipe, and the holes are connected to the first oil return channel and the second oil return channel; The elastic member tends to push the blocking element between the first oil return passage and the hole, and blocks the first oil return passage and the hole; The connecting rod mechanism can drive the blocking element and make the blocking element resist the elastic member and stay away from the first oil return channel and the hole, thereby connecting the first oil return channel and the second oil return channel.

9. The hydraulic hand tool according to claim 8, characterized in that The control pipeline has: a first pipe connected to the first oil return channel, wherein the hole is formed on the wall of the first pipe; the blocking element is disposed in the first pipe; A second pipeline is connected to the second oil return channel, and the second pipeline is sleeved on the first pipeline.

10. The hydraulic hand tool according to claim 9, characterized in that The motor has: a cam, the first end of the connecting rod mechanism is selectively connected to the cam, whereby the cam selectively drives the first end of the connecting rod mechanism; When the cam drives the first end of the link mechanism, the second end of the link mechanism drives the blocking element.

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