Pushing piece

Abstract

The pushing piece is composed of a motor, a screw rod, a nut and a linkage plate, the nut can be composed of a ball, a ball support and a shell, the nut and the screw rod form a support lead screw, the linkage plate is provided with a shaft hole for a shaft to penetrate out and limiting grooves symmetrically formed in the edge of the linkage plate, the screw rod and the nut are dynamically connected together in a screwed mode, and the motor is connected with the screw rod in a screwed mode. And the pushing piece can push the shaft on the door group to move upwards, downwards and stop. The pushing piece needs small thrust, abrasion between the screw rod and the nut can be effectively reduced through the support lead screw, sliding friction between the screw rod and the nut is replaced by rolling friction through the support lead screw, the product is simple in structure and low in price, and the cost of the support lead screw is obviously lower than that of a ball screw.

Description

Technical Field

[0001] This utility model relates to a pusher, and more particularly to a pusher for pushing a reversing valve or a gate assembly. Background Technology

[0002] In engineering, it is often necessary to control the lifting or lowering of hydraulic cylinders and their lifting and lowering speeds. This requires the cooperation of three-position directional valves with throttle valves or proportional valves to complete the required actions. In order to control different workpieces to work in a coordinated manner, digital hydraulic technology is required, including many complex components such as servo motors and digital pressure regulators. The entire set of equipment is complex in structure, large in size, and expensive, making it difficult for the product to be widely used. The function of the gate assembly is similar to a combination of a three-position directional valve and a proportional valve or throttle valve. The simple structure of the actuator solves the control of the gate assembly, solving the problem of controlling the lifting or lowering of the hydraulic cylinders and simultaneously controlling their lifting and lowering speeds.

[0003] In existing technologies, one pusher can usually only control one set of shafts. If there are two sets of asynchronous shafts in a product that need to be controlled, two pushers are used, which makes the structure complex and makes it difficult to coordinate the pushers. Ball screws or roller screws on the market have excellent performance and are available as options, but they are complex in structure and expensive. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a low-cost pusher that can simultaneously drive multiple shafts.

[0005] The technical solution of this utility model is a pushing component, which includes a screw, a nut, and a linkage plate with shaft holes and limiting grooves. The nut is embedded in the center of the linkage plate and connected to it as a whole. The linkage plate has four shaft holes; at least two limiting grooves are symmetrically arranged on the edge of the linkage plate; the screw matches the nut; the screw and nut are dynamically screwed together; the screw has a part for connecting or fixing an external power source. This pushing component is connected to power equipment such as a motor, and is used to push valves and other gate assemblies. The nut and screw can be dynamically screwed together.

[0006] According to a pusher of the present invention, the nut includes a housing and a ball bearing and a ball bearing bracket disposed on the inner side of the housing; the nut and the screw are dynamically screwed together to form a support screw.

[0007] Furthermore, the housing of the lead screw in the support plate, located at the center of the linkage plate, is integrally formed with the linkage plate. The housing is a component of the nut in the lead screw.

[0008] According to a pusher component of this utility model, the screw formed by dynamically screwing the nut and the screw together is a ball screw or a roller screw. In this utility model, the dynamic screwing of the nut and the screw together can form several screw structures. The difference in the screw components lies in the structure of the nut. Of course, "nut" here is a general term; any component that can dynamically interact with the screw is called a nut. The nut's shape is not visible on roller screws or ball screws, and similarly, it is not visible on support screws. The screw and the ball are universal; the use of a ball bearing bracket to fix the position of the ball in the support screw is unique to the support screw. Support screws and ball screws both have a housing, while roller screws may not have a housing. In a ball screw, there is no device to fix the position of the ball; the ball moves between the ball groove and the tooth groove. In a roller screw, the ball is replaced by multiple small screws surrounding the screw; in principle, these multiple small screws are the ball.

[0009] According to the present invention, a pusher is provided, wherein the external power source is a motor, and the output shaft of the motor is integrally formed with the screw.

[0010] Furthermore, the motor is equipped with a motor base plate, a reduction gear and a control circuit.

[0011] According to the present invention, a pusher is installed at the end of a door assembly bracket, the motor base plate on the pusher is connected to the bracket on the door assembly, and the inner wall of the door assembly bracket is provided with at least two positioning posts that match the limiting groove.

[0012] Furthermore, each of the four axes of the door assembly, namely A-axis, D-axis, B-axis, and C-axis, is equipped with a stop and a spring; the stop on the axis is connected to the axis in a cross direction, and the spring is sleeved on the axis.

[0013] Furthermore, the gate assembly is provided with a connecting channel, which is located in an area that does not obstruct the passage of other channels in the gate assembly; the connecting channel is connected to the discharge channel.

[0014] Furthermore, the connecting channel is connected to the drainage channel.

[0015] This utility model uses one pusher to drive two sets of asynchronous axes, namely A-axis, D-axis and B-axis, C-axis, so that the two sets of axes perform corresponding actions. The support screw uses the ball holes on the ball bracket to constrain the position of the ball in the support screw.

[0016] The beneficial effects of this utility model are:

[0017] This utility model consists of a motor, a screw, a nut, and a linkage plate to form a pusher. The nut can be composed of balls, a ball support, and a housing, and is dynamically screwed together with the screw to form a support screw. The pusher can drive two asynchronous shafts in the door assembly to move upward, downward, or stop. The use of a support screw on the pusher can reduce the frictional resistance during operation. The overall structure of the pusher is simple, easy to control, and has high control precision.

[0018] This pusher component solves the problem of controlling the lifting or lowering of the hydraulic cylinder, as well as controlling the lifting and lowering speed of the hydraulic cylinder. The cost of the pusher component is less than one percent of that of digital hydraulic technology, and its volume is also less than one percent of that of digital hydraulic technology.

[0019] The required thrust of this pusher is relatively small. The key challenge is to reduce wear between the screw and nut. The bracket screw in this invention not only replaces the sliding friction between the screw and nut with rolling friction, but also achieves a simple product structure and low price. The cost of the bracket screw is only a fraction of that of a ball screw. Attached Figure Description

[0020] Figure 1 This is a simplified diagram of a gate assembly.

[0021] Figure 2 This is a planar diagram showing the relative positions of the linkage plate, support screw, and positioning column.

[0022] Figure 3 This is a schematic diagram showing the positions of the screw in the pusher component, the shaft hole on the linkage plate and the upper and lower cover plates, the shaft, the connecting channel, the drainage channel, and the positioning column on the bracket in the door assembly.

[0023] Figure 4 This is a schematic diagram of the ball bearing support unfolded.

[0024] Figure 5 This is a schematic diagram showing the assembly of the outer shell, ball bearing support, and ball bearings in the lead screw.

[0025] Figure 6 This is a simplified plan view of the support screw.

[0026] Figure 7 This is a simplified schematic diagram of the support screw elevation.

[0027] Figure 8 This is a schematic diagram showing that the linkage plate does not contact any of the stops (only axes A and C are shown in the diagram; axes B and D are not visible), and the pushing component is in its original position.

[0028] Figure 9The diagram shows the linkage plate pushing the A and D axes (only the A and C axes are shown in the figure; the B and D axes are not visible). The B and C axes remain stationary, and the pushing component is in the T-position.

[0029] Figure 10 This is a schematic diagram showing the linkage plate pushing the B and C axes (only the A and C axes are shown in the diagram; the B and D axes are not visible). The A and D axes remain stationary, and the pushing component is in position U.

[0030] Figure 11 This is a schematic diagram showing that doors A, D, B, and C in the door group are all in a closed, fitted state.

[0031] Figure 12 This is a schematic diagram showing that doors A and D are in the open, separate state, while doors B and C are in the closed, fitted state.

[0032] Figure 13 This is a schematic diagram showing that doors B and C are in the open, separate state, while doors A and D are in the closed, fitted state.

[0033] Component symbols in the figure

[0034] 1. A-axis, 2. B-axis, 3. C-axis, 4. D-axis, 5. Stop, 6. Spring, 7. Cover plate, 8. Bracket, 9. Positioning pin, 10. Sealing cover, 11. A-hole, 12. B-hole, 13. C-hole, 14. D-hole, 15. Connecting channel, 16. Drainage channel, 17. Pushing component, 18. Motor, 19. Motor base plate, 20. Output shaft, 21. Screw, 22. Nut, 23. Ball bearing bracket, 24. Ball, 25. Ball bearing hole, 26. Housing, 27. Limiting groove, 28. Gear, 29. Shaft hole, 30. Linkage plate, 31. A-door, 32. B-door, 33. C-door, 34. D-door, 35. Bracket screw, 36. C-seal, 37. Sealing position, 38. Door assembly, 39. Discharge channel, 40. Discharge outlet. Detailed Implementation

[0035] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0036] In this utility model, the four shafts that pass through the shaft hole 29 on the top cover plate 7 of the door assembly 38 are referred to as: A-axis 1, B-axis 2, C-axis 3, and D-axis 4. The A-axis, B-axis, C-axis, and D-axis pass through the four shaft holes corresponding to them on the linkage plate 30, namely A-hole 11, B-hole 12, C-hole 13, and D-hole 14. The four fluid controllable doors corresponding to them are referred to as: A-door 31, B-door 32, C-door 33, and D-door 34.

[0037] In a preferred embodiment, the external power source is a motor. The motor 18, screw 21, nut 22, and linkage plate 30 with limit grooves 27 and four shaft holes 29 constitute the pusher 17. The output shaft 20 of the motor is longitudinally connected to the screw 21 as a single unit. The linkage plate is provided with four shaft holes corresponding to the A, D, B, and C axes that pass through the top cover plate of the door assembly, namely holes A, D, B, and C. At least two limit grooves 27 are symmetrically arranged on the edge of the linkage plate (see...). Figure 2 , Figure 3 The nut is embedded in the center of the linkage plate and connected to the linkage plate as one piece. The screw and nut are dynamically screwed together. Under the action of the motor rotating forward, reversing or stopping, the nut can move up and down or stop on the screw.

[0038] The nut is supported by ball bearing bracket 23 (see Figure 4 , Figure 5 The ball bearing 24 and the outer shell 26 are dynamically screwed together with the screw to form a support screw 35. The ball bearing hole 25 on the ball bearing support matches the ball bearing 24, and the ball bearing is movably embedded in the ball bearing hole. The ball bearing also matches the tooth groove 28 on the screw (see...). Figure 7 Matching the housing 26, the outer casing 26 is located on the periphery of the ball bearing support 23 (see...). Figure 5 , Figure 6 The number of ball bearing holes and balls shown in the diagram can be more than or less than 6. The number of ball bearing holes and balls is arbitrary; too many will increase manufacturing costs, but it cannot be less than 4, as too few balls will make the support screw unstable. The outer shell prevents the balls from falling out of the ball bearing support. Using a support screw reduces frictional resistance during the screw's screw-in and screw-out movements.

[0039] The housing of the lead screw in the support plate located in the center of the linkage plate is integrally formed with the linkage plate. The integral forming of the housing and the linkage plate can reduce the assembly error caused when the linkage plate and the housing are connected.

[0040] The motor output shaft 20 and the screw 21 are integrally formed. This integral forming can better ensure the concentricity of the motor output shaft and the screw, making the driving component run more smoothly and with less noise, and making assembly easier.

[0041] The motor 18 can be a DC motor, stepper motor, servo motor, coreless motor, electric actuator, etc. The motor is equipped with a motor base plate 19, a speed reducer, a control circuit, etc. These features enable the product to adapt to various needs more flexibly.

[0042] The pusher is installed at the end of the door assembly bracket. The motor base plate on the pusher motor is connected to the bracket 8 on the door assembly. The inner wall of the bracket on the door assembly is provided with at least two positioning pins 9 that match the limiting groove 27. The matching between the limiting groove and the positioning pins allows the amplitude of the linkage plate's sway to be better controlled when the linkage plate moves up and down.

[0043] Each of the A, D, B, and C axes of the door assembly is equipped with a stop 5 and a spring 6. The stop on the axis is connected to the axis in a cross direction, and the spring is sleeved on the axis. The springs on the A and D axes are located between the upper cover plate 7 and the stop, while the springs on the B and C axes are located between the motor base plate and the stop. In the door assembly, the stop on the A and D axes is located below the contact surface with the linkage plate, while the stop on the B and C axes is located above the contact surface with the linkage plate (see...). Figure 8 ),from Figure 3 As can be seen, holes A11, B12, C13, and D14 on the linkage plate correspond to axes A, B, C, and D of the shaft holes passing through the upper cover plate of the door assembly. A and D axes form one group, and B and C axes form another. These two groups of shafts passing through the shaft holes on the linkage plate are arranged in a crisscrossing pattern on the plane (see...). Figure 2 , Figure 3 This cross arrangement allows for better control of the amplitude of the linkage plate's sway when it moves upward or downward.

[0044] The gate assembly includes a discharge channel 39 with an outlet 40. A connecting channel 15 connects the space at one end of the support to the space at one end of the sealing cover 10. This connecting channel is located in an area that does not obstruct the passage of various pipes within the gate assembly. The connecting channel connects to the discharge channel and can also connect to the drainage channel 16 (see...). Figure 3 ).

[0045] Because the linkage plate in the pusher component drives the shaft in the door assembly to move upward and downward, friction will occur between the shaft and the seal. Over time, leakage will inevitably occur. Under the combined action of the door assembly, its bracket, motor base plate, and sealing cover, the entire door assembly is in a sealed state. The leaked fluid medium can be discharged through the connecting channel and discharge channel, or through the drainage channel in the door assembly (see...). Figure 3 When the fluid medium used in the product is gas, the connecting channel, drainage channel, and sealing cap can be retained or omitted. That is, when the fluid medium used in the product is gas, retaining the connecting channel, drainage channel, and sealing cap has no impact on the function, and omitting these components has no impact on the function either; omitting these components helps to reduce the number of components.

[0046] In the gate assembly, the highest rising positions of axes A and D, and the lowest falling positions of axes B and C, are all constrained by the restriction of the sealing position 37 on the C-seal 36 on the shaft (see...). Figure 1 , Figure 11 Set the stops on axes A and D to different heights than those on axes B and C. Position the stops on axes A and D below the contact surface with the linkage plate, and the stops on axes B and C above the contact surface with the linkage plate. The linkage plate and the four stops can be separated and not in contact (see...). Figure 8 When the linkage plate is separated from the four stops and not in contact, the C-seals on the four shafts are in a closed state with their corresponding sealing positions under the action of the springs (see...). Figure 1 , Figure 8 , Figure 11 This state is called the pusher being in its original position.

[0047] With the pusher in its original position, driven by the reverse rotation of the motor with a speed reducer, the linkage plate moves downward. Axis B and C are restricted by the sealing position, limiting the movement of the C seal. Axis B and C stop moving, and the linkage plate pushes the stops on axes A and D, causing the C seal on axes A and D to gradually separate from the sealing position. At this point, the pusher is said to be in position T (see...). Figure 9 , Figure 12 ).

[0048] When the pusher is in position T, the motor rotates forward, the linkage plate moves upward, and the A and D axes move the C seal on the shaft towards the sealing position under the action of the spring. As long as door A31 and door D34 are in the open state, the pusher is said to be in position T.

[0049] As the motor rotates forward, the pushing component gradually returns to its original position. The linkage plate is then separated from all the stops and is no longer in contact. The motor continues to rotate forward, and the linkage plate continues to move upward. A and D axes, constrained by the sealing position's restriction on the C seal, stop moving. The linkage plate pushes the stops on B and C axes, causing the C seal on B and C axes to gradually separate from the sealing position. At this point, the pushing component is said to be in position U (see...). Figure 10 , Figure 13 As long as gate B 32 and gate C 33 are in the open state, the pusher is said to be in the U position.

[0050] The forward, reverse, and stop rotation of the motor causes the two sets of axes, A and D, and B and C, driven by the linkage plate to make corresponding upward, downward, or stop movements. The motor can change its rotation direction, whether it rotates, and the angle of rotation (several degrees, tens of degrees, hundreds of degrees, or even more degrees) as needed. Driven by the forward, reverse, or stop rotation of the motor, the screw and nut can follow suit and make mutual screwing in, screwing out, or stopping movements. The linkage plate drives the A and D axes, or B and C axes, to move upward, downward, or stop, and the range of movement also changes accordingly. By increasing the reduction factor of the motor reducer, the movement accuracy of the linkage plate when moving upward and downward can be controlled more precisely.

[0051] The pusher component achieves the goal of moving the two shafts upwards, downwards, or stopping solely by rotating the motor forwards, backwards, or stopping. The angle of motor rotation determines the range of upward or downward movement of the linkage plate. By increasing the reduction factor of the motor reducer, the accuracy of the linkage plate's upward and downward movement can be more precisely controlled. The support screw in the pusher component uses a ball bearing bracket to constrain the balls. This reduces frictional resistance during operation, lowering motor resistance and extending product lifespan. With the combined action of the upper bracket, motor base plate, and sealing cover, the entire door assembly is sealed. Leaked fluid can be discharged through the connecting and drainage channels.

[0052] The pusher component has only one motor, so it is easy to control. The support screw structure is simple and easy to manufacture. The simple structure of the pusher component is conducive to product assembly, which makes the overall production cost low.

[0053] Preliminary Explanation of Examples

[0054] The embodiments only provide a simplified description of the operation of the pusher. Since the pusher can change the motor's rotation direction, rotation angle, and whether it rotates at any time as needed, the movement of the linkage plate along axes A, D, B, and C—whether downward or upward, and the amplitude of that movement or its cessation—can also change accordingly. Such details will not be elaborated further in the embodiments.

[0055] Example

[0056] 1. When the linkage plate on the pusher is separated from the four stops on the shaft, doors A, D, B, and C are all closed under the action of the spring. This is called the pusher being in its original position (see...). Figure 1 , Figure 8 , Figure 11 As long as doors A, D, B, and C are all in a closed and fitted state, the pusher is said to be in its original position.

[0057] 2. The pusher is in its original position. Driven by the reverse rotation of the motor, the pusher moves downward. Due to the restriction of the sealing position on the C seal, the B and C axes remain stationary. The linkage plate pushes the stops on the A and D axes, causing the C seal on the A and D axes to separate from the sealing position. This is called the pusher being in position T (see...). Figure 9 , Figure 12 As long as gates A and D are in a separated state, the pusher is said to be in position T.

[0058] 3. When the pusher is at position T, the motor rotates forward, causing the linkage plate to move upward. The spring pushes axes A and D until the C seals on axes A and D are engaged and closed. The linkage plate continues to move upward until the linkage plate is disengaged from the four stops on the shaft, and the pusher returns to its original position (see...). Figure 1 , Figure 8 , Figure 11 ).

[0059] 4. The motor continues to rotate forward. Due to the restriction of the sealing position on the C seal, axes A and D remain stationary. The linkage plate pushes the stops on axes B and C, causing the C seal on axes B and C to separate from the sealing position. Gates B and C are in a separated and open state, which is said to mean that the pusher is in position U (see...). Figure 10 , Figure 13 When only gates B and C are in a separated state, the pusher is said to be in the U position.

[0060] 5. When the pusher is in position U, the motor reverses, causing the linkage plate to move downwards. The spring pushes shafts B and C until the C seal on shafts B and C is in contact with the sealing position. Shafts B and C then stop moving. The linkage plate continues to move downwards until it is separated from the four stops on the shaft. All four door assemblies are then in the closed position, and the pusher returns to its original position (see...). Figure 1 , Figure 8 , Figure 11 ).

Claims

1. A pushing component, characterized in that: The pushing component includes a screw, a nut, and a linkage plate with shaft holes and limiting grooves. The nut is embedded in the center of the linkage plate and is connected to the linkage plate as a whole. The linkage plate is provided with 4 shaft holes. At least 2 limiting grooves are symmetrically provided on the edge of the linkage plate. The screw matches the nut. The screw and nut are dynamically screwed together. The screw is provided with a part for connecting or fixing an external power source.

2. A pusher according to claim 1, characterized in that: The nut includes a housing and balls and ball supports provided on the inner side of the housing; the nut and the screw are dynamically screwed together to form a support screw.

3. A pusher according to claim 2, characterized in that: The outer casing of the lead screw in the bracket located in the center of the linkage plate is integrally formed with the linkage plate.

4. A pusher according to claim 1, characterized in that: The screw formed by dynamically screwing the nut and the screw together is a ball screw or a roller screw.

5. A pusher according to claim 1, characterized in that: The external power source is a motor, and the output shaft of the motor is integrally formed with the screw.

6. A pusher according to claim 5, characterized in that: The motor is equipped with a motor base plate, a speed reduction component, and a control circuit.

7. A pusher according to claim 1, characterized in that: The pusher is installed at the end of the door assembly bracket. The motor base plate on the pusher is connected to the bracket on the door assembly. The inner wall of the door assembly bracket is provided with at least two positioning posts that match the limiting groove.

8. A pusher according to claim 7, characterized in that: Each of the four axes of the door assembly, namely A, D, B, and C, is equipped with a stop and a spring; the stop on the axis is connected to the axis in a cross direction, and the spring is sleeved on the axis.

9. A pusher according to claim 7, characterized in that: The gate assembly is provided with a connecting channel, which is located in an area that does not obstruct the passage of other channels in the gate assembly; the connecting channel is connected to the discharge channel.

10. A pusher according to claim 7, characterized in that: The connecting channel is connected to the drainage channel.

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