An electro-hydraulic tong assembly

Abstract

The utility model discloses a kind of electric hydraulic clamp assemblies, comprising: oil pump seat, the oil inlet hole and oil outlet passage are equipped on the oil pump seat;Oil bag, it is set in the oil pump seat, for storing pressure oil, the pressure oil in the oil bag enters the oil pump seat by the oil inlet hole;Plunger body, it is set in the oil pump seat, at least one oil sending passage is equipped on the plunger body with the oil outlet passage communication;Oil outlet valve assembly, for controlling the communication or closure of the oil sending passage and the oil outlet passage;Plunger rod, it is sealingly and slidingly arranged in the oil outlet passage, connection passage is arranged on the plunger rod, and it also includes biasing shaft and power component.The utility model structure design is reasonable, by setting the biasing shaft with inclined surface, to drive plunger rod movement to realize pressure oil into oil outlet passage, biasing shaft single rotation can realize at least one plunger rod action, and work effect is higher, can provide greater driving force.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic clamp technology, and more specifically, to an electric hydraulic clamp assembly. Background Technology

[0002] The applicant's earlier application CN217502150U discloses an electro-hydraulic clamp, including an oil pump base, an oil bag, and a pressure relief valve assembly. The oil pump base has an oil outlet channel and a first pressure relief channel. The oil bag is used to store pressurized oil. The pressure relief valve assembly is located on the oil pump base and is used to achieve automatic pressure relief. The pressure relief valve assembly includes a pressure relief valve seat, a pressure relief valve piston, a push pin, and a pressure relief elastic element. The pressure relief valve seat is located on the oil pump base and has a pressure relief port communicating with the oil outlet channel. The pressure relief valve piston is movably located on the oil pump base and is used to move along the axial direction of the pressure relief valve seat. The push pin is located on the pressure relief valve piston and is used to block the pressure relief port. The pressure relief elastic element abuts between the pressure relief valve piston and the oil pump base and is used to provide elastic force to the pressure relief valve piston, causing the push pin to tend to move closer to the pressure relief port. The above-mentioned electro-hydraulic clamp has a high degree of automation and can achieve fully automatic pressure relief and reset functions. It can protect internal seals and other components and extend the overall service life of the electro-hydraulic clamp.

[0003] The existing electric hydraulic clamps described above use a power drive component to move a power eccentric shaft, a power eccentric wheel, and an oil pump piston rod to draw oil from an oil bag. The power drive component of the above solution has low efficiency, and the hydraulic clamps cannot provide greater driving force in actual operation. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art and proposes an electric hydraulic clamp assembly with a reasonable structural design. By setting an offset shaft with an inclined surface, it drives the piston rod to move so that the pressurized oil can enter the oil outlet channel. A single rotation of the offset shaft can realize the action of at least one piston rod, resulting in higher work efficiency and providing greater driving force.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An electro-hydraulic clamp assembly, comprising: An oil pump base, wherein the oil pump base is provided with an oil inlet hole and an oil outlet channel; An oil bag is fitted onto the oil pump base to store pressurized oil. The pressurized oil in the oil bag enters the oil pump base through the oil inlet. A plunger body is disposed within the oil pump seat, and the plunger body is provided with at least one oil delivery channel communicating with the oil outlet channel; An oil outlet valve assembly is used to control the connection or closure of the oil supply channel and the oil outlet channel; A plunger rod is slidably disposed in the oil outlet channel. A connecting channel is provided on the plunger rod. The pressure oil in the oil pump seat enters the oil delivery channel through the connecting channel. The plunger rod moves axially along the plunger body to open the oil outlet valve assembly, thereby pumping the pressure oil in the oil delivery channel into the oil outlet channel. A plunger elastic element is provided between the plunger rod and the plunger body. An offset shaft is rotatably mounted in the oil pump housing, and the offset shaft has an inclined surface that abuts against the plunger rod and drives the plunger rod to move; A power component for driving the offset shaft to rotate.

[0006] By adopting the above technical solution, the pressurized oil in the oil bag enters the oil delivery channel through the oil inlet and connecting channel. The oil delivery channel and the piston rod are correspondingly set. There can be three oil delivery channels and piston rods, or two, four, or other different numbers, as long as each piston rod can be driven by the inclined surface. Each piston rod abuts against the inclined surface of the offset shaft. The offset shaft is driven to rotate by the power component, and the piston rod will abut against different positions of the inclined surface, causing the piston rod to move up and down reciprocally. This changes the pressure of the pressurized oil in the oil delivery channel acting on the oil outlet valve assembly, causing the oil outlet valve assembly to open or close. When the oil outlet valve assembly opens, the pressurized oil will enter the oil outlet channel from the oil delivery channel, thereby pushing the piston in the working chamber. The piston elastic element is compressed and stored by the inclined surface, and provides a restoring force to the piston rod. With this configuration, by setting an offset shaft with an inclined surface to drive the piston rod to move so that pressurized oil can enter the oil outlet channel, at least one piston rod can be moved with a single rotation of the offset shaft, resulting in higher work efficiency and providing greater driving force.

[0007] Preferably, the oil outlet valve assembly includes a one-way valve disposed in the oil delivery channel. The one-way valve is provided with an inlet, an outlet, and a valve plate. The valve plate is movably disposed in the one-way valve to close or open the inlet.

[0008] By adopting the above technical solution, the pressure oil in the oil delivery channel pushes the valve plate upward, connecting the inlet and outlet. The pressure oil in the oil delivery channel will then flow into the oil outlet channel, and the check valve can prevent the pressure oil in the oil outlet channel from flowing back into the oil delivery channel.

[0009] Preferably, the oil outlet valve assembly includes a ball that abuts against the oil delivery channel, and an elastic element for the ball is provided between the ball and the oil pump seat.

[0010] In another embodiment of the above technical solution, the ball can be a steel ball and the elastic element of the ball is a spring. The steel ball is pressed against the oil delivery channel by the spring. Only after the pressure oil in the oil delivery channel pushes the steel ball open will the pressure oil enter the oil outlet channel. The spring can provide elastic restoring force for the steel ball to keep the steel ball from blocking the oil delivery channel when it is not under force.

[0011] Preferably, it further includes a bushing disposed in the oil pump seat, the bushing having an oil inlet communicating with the oil inlet hole, and the bushing abutting against the plunger body.

[0012] By adopting the above technical solution, the plunger body is fixedly installed in the oil pump seat. When the oil inlet valve assembly adopts a one-way valve, the axial dimension of the plunger body will increase, making it difficult to achieve the installation and positioning of the plunger body. However, by setting a bushing, it can abut against the plunger body, thereby ensuring the stable positioning of the plunger body. The bushing is provided with an oil inlet, and the pressurized oil will enter the interior of the bushing and then enter the oil delivery channel through the connecting channel.

[0013] Preferably, the plunger rod has an arc-shaped abutment portion at one end near the bias shaft, a gasket is provided between the bias shaft and the plunger rod, and an abutment block is provided on the gasket at the position corresponding to the arc-shaped abutment portion, with both ends of the abutment block abutting against the arc-shaped abutment portion and the inclined surface, respectively.

[0014] By adopting the above technical solution, the arc-shaped abutment part is specifically designed to protrude downwards, making the pressure of the inclined surface on the plunger rod more sensitive when the offset shaft rotates. The pad and gasket have a good buffering effect, preventing the offset shaft from directly acting on the plunger rod and causing wear on the plunger rod.

[0015] Preferably, the power component includes a planetary carrier linked to the offset shaft, a central gear disposed on the planetary carrier, planetary gears disposed on the planetary carrier and located on the outer periphery of the central gear, an internal gear ring located on the outer side of the planetary gears, and a drive motor for driving the central gear to rotate.

[0016] By adopting the above technical solution, during specific operation, the drive motor drives the central gear to rotate, and the central gear drives the planetary gear to rotate. Due to the setting of the internal gear ring, the planetary gear will also revolve around the central gear while rotating on its own axis, thereby driving the planet carrier to rotate. Since the planet carrier is linked to the offset shaft, it drives the offset shaft to rotate. This setting can provide greater rotational force to the offset shaft, thereby improving the driving force of the hydraulic clamp.

[0017] Preferably, a motor connecting piece is fixedly mounted on the drive motor, and the motor connecting piece has a stepped surface. The internal gear ring abuts against the stepped surface and is fixedly connected to the motor connecting piece.

[0018] By adopting the above technical solution, the internal gear ring is positioned and installed through the motor connecting piece, ensuring the meshing and engagement of the internal gear ring and the planetary gear, and ensuring the transmission stability of the power component.

[0019] Preferably, a dustproof sealing ring is fitted on the bias shaft, an oil seal nut sleeve is fixedly installed inside the oil pump seat, the dustproof sealing ring is located in the oil seal nut sleeve, and a bearing is provided between the bias shaft and the oil pump seat.

[0020] By adopting the above technical solutions, the dustproof sealing ring can effectively prevent impurities or dust from entering the power components, thus ensuring the smooth transmission of the power components. The combined setting of the oil seal nut sleeve and the dustproof sealing ring can separate the space above and below the oil pump seat on the offset shaft, preventing hydraulic oil from entering the components of the power components. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a specific embodiment of the present utility model; Figure 2 This is a schematic diagram of another specific embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the structure of the oil pump base according to a specific embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the structure of the plunger body in a specific embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the structure of the offset shaft in a specific embodiment of this utility model; Figure 6 This is a schematic diagram illustrating the structure of the one-way valve according to a specific embodiment of this utility model; Figure 7 This is a schematic diagram illustrating the structure of the planetary carrier in a specific embodiment of this utility model.

[0022] In the diagram: 1. Oil pump base; 11. Oil inlet; 12. Oil outlet channel; 2. Oil bag; 3. Plunger body; 31. Oil delivery channel; 32. Bushing; 33. Oil inlet; 4. Oil outlet valve assembly; 41. Check valve; 42. Inlet; 43. Outlet; 44. Valve plate; 45. Ball; 46. Ball elastic element; 5. Plunger rod; 51. Connecting channel; 52. Plunger elastic element; 53. Arc-shaped abutment part; 54. Gasket; 55. Abutment pad; 6. Offset shaft; 61. Inclined surface; 62. Dustproof sealing ring; 63. Oil seal nut sleeve; 64. Bearing; 7. Power component; 71. Planetary carrier; 72. Central gear; 73. Planetary gear; 74. Internal gear ring; 75. Drive motor; 76. Motor connecting piece; 77. Stepped surface. Detailed Implementation

[0023] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] It should be noted that all directional indicators (such as up, down, forward, backward, etc.) in the description of this utility model are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] like Figure 1-7 As shown, an electric hydraulic clamp assembly includes: an oil pump base 1, which has an oil inlet hole 11 and an oil outlet channel 12; an oil bag 2, fitted onto the oil pump base 1, for storing pressurized oil, the pressurized oil in the oil bag 2 entering the oil pump base 1 through the oil inlet hole 11; a plunger body 3, disposed within the oil pump base 1, the plunger body 3 having at least one oil delivery channel 31 communicating with the oil outlet channel 12; an oil outlet valve assembly 4, for controlling the connection or closure of the oil delivery channel 31 and the oil outlet channel 12; and a plunger rod 5, slidably and sealingly disposed within the oil outlet channel 12. A connecting channel 51 is provided on the rod 5. The pressurized oil in the oil pump seat 1 enters the oil delivery channel 31 through the connecting channel 51. The plunger rod 5 moves axially along the plunger body 3 to open the oil outlet valve assembly 4, thereby pumping the pressurized oil in the oil delivery channel 31 into the oil outlet channel 12. A plunger elastic element 52 is provided between the plunger rod 5 and the plunger body 3. An offset shaft 6 is rotatably disposed in the oil pump seat 1. The offset shaft 6 has an inclined surface 61 that abuts against the plunger rod 5 and drives the plunger rod 5 to move. A power component 7 is used to drive the offset shaft 6 to rotate.

[0028] By adopting the above technical solution, the pressurized oil in the oil bag 2 enters the oil delivery channel 31 through the oil inlet 11 and the connecting channel 51. The oil delivery channel 31 and the piston rod 5 are correspondingly arranged. There can be three oil delivery channels 31 and piston rods. Of course, there can also be two, four, or other different numbers of oil delivery channels 31 and piston rods 5, as long as each piston rod 5 can be driven by the inclined surface 61. Each piston rod 5 abuts against the inclined surface 61 of the offset shaft 6. The offset shaft 6 is driven to rotate by the power component 7. The piston rod 5 will abut against different positions of the inclined surface 61, so that the piston rod 5 moves up and down reciprocally, thereby changing the pressure of the pressurized oil in the oil delivery channel 31 acting on the oil outlet valve assembly 4, so that the oil outlet valve assembly 4 opens or closes. When the oil outlet valve assembly 4 is open, the pressurized oil will enter the oil outlet channel 12 from the oil delivery channel 31, thereby pushing the piston in the working chamber. The piston elastic element 52 is compressed and stored by the inclined surface 61 and does not provide a restoring force for the piston rod 5. With this configuration, by setting an offset shaft 6 with an inclined surface 61, the piston rod 5 is driven to move so that the pressurized oil enters the oil outlet channel 12. A single rotation of the offset shaft 6 can achieve the action of at least one piston rod 5, resulting in higher work efficiency and providing greater driving force.

[0029] The oil outlet valve assembly 4 includes a one-way valve 41 disposed in the oil delivery channel 31. The one-way valve 41 is provided with an inlet 42, an outlet 43, and a valve plate 44. The valve plate 44 is movably disposed in the one-way valve 41 to close or open the inlet 42. The pressurized oil in the oil delivery channel 31 pushes the valve plate 44 upward, connecting the inlet 42 and the outlet 43, so that the pressurized oil in the oil delivery channel 31 flows into the oil outlet channel 12. The one-way valve 41 can prevent the pressurized oil in the oil outlet channel 12 from flowing back into the oil delivery channel 31.

[0030] Alternatively, the oil outlet valve assembly 4 includes a ball 45 abutting against the oil delivery channel 31, with a ball elastic element 46 disposed between the ball 45 and the oil pump seat 1. In another embodiment, the ball 45 can be a steel ball, and the ball elastic element 46 can be a spring. The spring holds the steel ball against the oil delivery channel 31, allowing pressurized oil to enter the oil outlet channel 12 only after the pressurized oil in the oil delivery channel 31 pushes the steel ball open. The spring provides elastic restoring force to the steel ball, maintaining its blockage of the oil delivery channel 31 when it is not under stress.

[0031] Furthermore, it also includes a bushing 32 disposed within the oil pump seat 1. The bushing 32 is provided with an oil inlet 33 communicating with the oil inlet hole 11, and the bushing 32 abuts against the plunger body 3. The plunger body 3 is fixedly installed within the oil pump seat 1. When the oil inlet valve assembly uses a one-way valve 41, the axial dimension of the plunger body 3 will increase, making it difficult to achieve the installation and positioning of the plunger body 3. However, by providing the bushing 32, it can abut against the plunger body 3, thereby ensuring the stable positioning of the plunger body 3. The bushing 32 is provided with an oil inlet 33, and pressurized oil will enter the interior of the bushing 32 and then enter the oil delivery channel 31 through the connecting channel 51.

[0032] Furthermore, an arc-shaped abutment portion 53 is formed at one end of the plunger rod 5 near the offset shaft 6. A gasket 54 is provided between the offset shaft 6 and the plunger rod 5. An abutment block 55 is provided on the gasket 54 corresponding to the position of the arc-shaped abutment portion 53. The two ends of the abutment block 55 abut against the arc-shaped abutment portion 53 and the inclined surface 61, respectively. Specifically, the arc-shaped abutment portion 53 is convex downward, making the pressure of the inclined surface 61 on the plunger rod 5 more sensitive when the offset shaft 6 rotates. The gasket and gasket 54 provide good buffering effect, preventing the offset shaft 6 from directly acting on the plunger rod 5 and causing wear on the plunger rod 5.

[0033] Furthermore, the power component 7 includes a planetary carrier 71 linked to the offset shaft 6, a central gear 72 mounted on the planetary carrier 71, a planetary gear 73 mounted on the planetary carrier 71 and located on the outer periphery of the central gear 72, an internal gear ring 74 located outside the planetary gear 73, and a drive motor 75 that drives the central gear 72 to rotate. In operation, the drive motor 75 drives the central gear 72 to rotate, which in turn drives the planetary gear 73 to rotate. Due to the internal gear ring 74, the planetary gear 73, while rotating on its own axis, also revolves around the central gear 72, thereby driving the planetary carrier 71 to rotate. Since the planetary carrier 71 is linked to the offset shaft 6, it drives the offset shaft 6 to rotate. This configuration provides greater rotational force to the offset shaft 6, thereby increasing the driving force of the hydraulic clamp.

[0034] In addition, a motor connecting piece 76 is fixedly mounted on the drive motor 75. The motor connecting piece 76 has a stepped surface 77, and the internal gear ring 74 abuts against the stepped surface 77 and is fixedly connected to the motor connecting piece 76. The motor connecting piece 76 enables the positioning and installation of the internal gear ring 74, ensuring the meshing and engagement of the internal gear ring 74 with the planetary gear 73, and ensuring the transmission stability of the power component 7.

[0035] Furthermore, a dustproof sealing ring 62 is fitted onto the offset shaft 6, and an oil seal nut sleeve 63 is fixedly installed inside the oil pump seat 1. The dustproof sealing ring 62 is located within the oil seal nut sleeve 63, and a bearing 64 is provided between the offset shaft 6 and the oil pump seat 1. The dustproof sealing ring 62 effectively prevents impurities or dust from entering the power component 7, ensuring the smooth transmission of the power component 7. The combined arrangement of the oil seal nut sleeve 63 and the dustproof sealing ring 62 separates the space above and below the oil pump seat 1 located on the offset shaft 6, preventing hydraulic oil from entering the components of the power component 7.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electro-hydraulic clamp assembly, characterized in that, include: Oil pump base (1), the oil pump base (1) is provided with an oil inlet hole (11) and an oil outlet channel (12); An oil bag (2) is fitted onto the oil pump seat (1) for storing pressurized oil. The pressurized oil in the oil bag (2) enters the oil pump seat (1) through the oil inlet (11). A plunger body (3) is disposed inside the oil pump seat (1), and the plunger body (3) is provided with at least one oil delivery channel (31) communicating with the oil outlet channel (12); The oil outlet valve assembly (4) is used to control the connection or closure of the oil delivery channel (31) and the oil outlet channel (12); A plunger rod (5) is slidably disposed in the oil outlet channel (12). A connecting channel (51) is provided on the plunger rod (5). The pressure oil in the oil pump seat (1) enters the oil delivery channel (31) through the connecting channel (51). The plunger rod (5) moves axially along the plunger body (3) to open the oil outlet valve assembly (4), thereby pumping the pressure oil in the oil delivery channel (31) into the oil outlet channel (12). A plunger elastic element (52) is provided between the plunger rod (5) and the plunger body (3). An offset shaft (6) is rotatably disposed in the oil pump seat (1). The offset shaft (6) has an inclined surface (61) that abuts against the plunger rod (5) and drives the plunger rod (5) to move. A power component (7) is used to drive the offset shaft (6) to rotate.

2. The electro-hydraulic clamp assembly according to claim 1, characterized in that, The oil outlet valve assembly (4) includes a one-way valve (41) disposed in the oil delivery channel (31). The one-way valve (41) is provided with an inlet (42), an outlet (43) and a valve plate (44). The valve plate (44) is movably disposed in the one-way valve (41) to close or open the inlet (42).

3. The electro-hydraulic clamp assembly according to claim 1, characterized in that, The oil outlet valve assembly (4) includes a ball (45) that abuts against the oil delivery channel (31), and a ball elastic element (46) is provided between the ball (45) and the oil pump seat (1).

4. An electro-hydraulic clamp assembly according to claim 2, characterized in that, It also includes a bushing (32) disposed in the oil pump seat (1), the bushing (32) being provided with an oil inlet (33) communicating with the oil inlet hole (11), and the bushing (32) abutting against the plunger body (3).

5. An electro-hydraulic clamp assembly according to claim 1, 2, or 3, characterized in that, An arc-shaped abutment portion (53) is formed at one end of the plunger rod (5) near the offset shaft (6). A gasket (54) is provided between the offset shaft (6) and the plunger rod (5). An abutment block (55) is provided on the gasket (54) at the position corresponding to the arc-shaped abutment portion (53). The two ends of the abutment block (55) abut against the arc-shaped abutment portion (53) and the inclined surface (61) respectively.

6. An electro-hydraulic clamp assembly according to claim 5, characterized in that, The power component (7) includes a planet carrier (71) linked to the offset shaft (6), a central gear (72) on the planet carrier (71), a planet gear (73) on the planet carrier (71) and located on the outer periphery of the central gear (72), an internal gear ring (74) located on the outer side of the planet gear (73), and a drive motor (75) for driving the central gear (72) to rotate.

7. An electro-hydraulic clamp assembly according to claim 6, characterized in that, A motor connecting piece (76) is fixedly installed on the drive motor (75). The motor connecting piece (76) has a stepped surface (77). The internal gear ring (74) abuts against the stepped surface (77) and is fixedly connected to the motor connecting piece (76).

8. An electro-hydraulic clamp assembly according to claim 7, characterized in that, A dustproof sealing ring (62) is fitted on the bias shaft (6), and an oil seal nut sleeve (63) is fixedly installed inside the oil pump seat (1). The dustproof sealing ring (62) is located in the oil seal nut sleeve (63), and a bearing (64) is provided between the bias shaft (6) and the oil pump seat (1).

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