Exchange workbench base and lifting system

Abstract

The application discloses a kind of exchange workstation pedestal and lifting system, including rack, guide rail seat, two groups of swing arm assemblies, connecting rod and drive cylinder.Each group of swing arm assemblies includes rotatably disposed on the shaft of rack and the support arm connected to the shaft, support arm is hinged with guide rail seat.Connecting rod is connected between two groups of swing arm assemblies and length is adjustable, drive cylinder is connected with one group of swing arm assemblies to drive guide rail seat lifting.When installation, because of processing and assembly error, the initial angle of two groups of swing arm assemblies is inconsistent, guide rail seat is inclined, the relative relationship of the rotation angle of two groups of shafts is changed by adjusting the length of connecting rod, the swing angle deviation of support arm is corrected, guide rail seat is kept horizontal, avoid the problem that workpiece slides due to guide rail seat inclination, improve installation and debugging efficiency.

Description

Technical Field

[0001] This application belongs to the field of laser processing technology, and more specifically, relates to an exchange worktable base and lifting system. Background Technology

[0002] Exchange worktables are widely used in processing equipment such as laser cutting and CNC machine tools to achieve automatic workpiece exchange and improve processing efficiency. Among them, the lifting mechanism is the core component of the exchange worktable, responsible for driving the worktable to switch between upper and lower positions.

[0003] In existing technologies, a common lifting mechanism employs a double-swing arm design. This involves rotatable swing arm assemblies on both sides of the frame, with the two arms moving synchronously via connecting rods. A drive cylinder rotates one side of the swing arm, causing the two support arms to lift the guide rail seat simultaneously. This design is compact, has a high load-bearing capacity, and has been widely adopted.

[0004] However, the above solution has the following problems in actual installation: due to the inevitable dimensional errors in the processing and assembly of components such as the frame, swing arm, and connecting rod, the initial installation angles of the two swing arm assemblies are difficult to be completely consistent, resulting in uneven heights on both sides of the guide rail seat and causing tilting. After installation, it cannot be kept horizontal, and the tilting can easily cause the workpiece to slip, affecting the positioning accuracy and processing safety. Summary of the Invention

[0005] This application provides an exchange workbench base that facilitates adjustment of the guide rail level and provides high positioning accuracy.

[0006] The technical solution adopted in this application embodiment is: providing an exchange workbench base, including:

[0007] A frame; a guide rail base; two sets of swing arm assemblies, each swing arm assembly including a shaft and a support arm, the shaft being rotatably mounted on the frame, the support arm being fixedly connected to the shaft to rotate synchronously with the shaft, the support arm being hinged to the guide rail base; a connecting rod, connected between the two sets of swing arm assemblies, the connecting rod including a main body and at least one adjusting member, the adjusting member being connected to the main body and capable of adjusting its position relative to the main body along the length direction of the connecting rod to adjust the length of the connecting rod; a drive cylinder, connected to one set of swing arm assemblies, for driving the guide rail base to rise and fall.

[0008] Furthermore, the main body is a sleeve, and the adjusting component is two screws. The two screws are respectively threaded to both ends of the sleeve, and the internal threads at both ends of the sleeve turn in opposite directions. The two screws are respectively connected to two sets of the swing arm assemblies. By rotating the sleeve, the two screws are simultaneously screwed in or out to adjust the length of the connecting rod.

[0009] Furthermore, the threaded joint between the sleeve and the screw is coated with a thread-locking agent to lock the length of the connecting rod.

[0010] Furthermore, a locking nut is threaded onto the screw, and the locking nut abuts against the end face of the sleeve to lock the length of the connecting rod.

[0011] Furthermore, the swing arm assembly also includes a linkage arm, which is fixedly connected to the shaft to rotate synchronously with the shaft. The two ends of the connecting rod are respectively hinged to the linkage arms of two sets of the swing arm assemblies, and the drive cylinder is connected to the linkage arm of one set of the swing arm assemblies.

[0012] Furthermore, the support arm and the linkage arm are arranged at an angle along the axial projection of the axis, and the angle is 40° to 50°.

[0013] Furthermore, the drive cylinder has a push end, the connecting rod has a first end, and the push end, the first end, and one of the linkage arms are hinged together on the same hinge axis.

[0014] Furthermore, at least one end of the connecting rod has a spherical cavity, in which a ball head is fitted, and the ball head is connected to the linkage arm.

[0015] Furthermore, the exchange workbench base includes a sensor switch, which is mounted on the frame and is used to detect the rotation amplitude of the two sets of swing arm assemblies and control the stroke of the drive cylinder.

[0016] This application also provides a lifting system, including the exchange workbench base as described above.

[0017] The beneficial effects of the exchange table base provided in this application embodiment are as follows: The exchange table base provided in this embodiment of the invention is provided with a frame, a guide rail seat, two sets of swing arm assemblies, a connecting rod, and a drive cylinder. The swing arm assembly includes a shaft and a support arm. The support arm is fixedly connected to the shaft and rotates synchronously with the shaft. The support arm is hinged to the guide rail seat. The drive cylinder is connected to one of the swing arm assemblies to drive the guide rail seat to rise and fall. The connecting rod is connected between the two sets of swing arm assemblies, and its length is adjusted by adjusting the relative position of the main body and the adjusting component. During installation and debugging, the processing and assembly errors of the frame, swing arm assemblies, and connecting rod can be compensated by adjusting the length of the connecting rod, changing the relative positional relationship between the two sets of swing arm assemblies, making the initial installation angle of the two sets of swing arm assemblies tend to be consistent, thereby correcting the height difference on both sides of the guide rail seat, so that the guide rail seat remains horizontal after installation. Therefore, the risk of workpiece slippage caused by the tilt of the guide rail seat can be reduced, and the positioning accuracy and processing safety of the exchange table can be improved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the exchange workbench base in the lifted state provided in an embodiment of this application; Figure 2 A schematic diagram of the structure of the exchange workbench base in the fallen state provided in an embodiment of this application; Figure 3 For along Figure 1 Enlarged view of the local structure at point A; Figure 4 This is a schematic diagram of the swing arm assembly along its axial direction. Figure 5 This is a schematic diagram of the ball joint connection structure at the end of the connecting rod.

[0020] The following are the labeling elements in the figure: 100. Frame; 200. Guide rail base; 300. Swing arm assembly; 310. Shaft; 320. Support arm; 330. Linkage arm; 331. Arm plate 400. Connecting rod; 410. Sleeve; 420. Screw; 430. Lock nut; 440. Connecting plate; 450. Spherical cavity; 460. Ball head; 500, drive cylinder; 600. Induction switch. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] Please see Figure 1 and Figure 2 This application provides an exchange workbench base, including: a frame 100, a guide rail base 200, two sets of swing arm assemblies 300, a connecting rod 400, and a drive cylinder 500.

[0026] The frame 100 serves as the supporting foundation for the entire base. Two sets of swing arm assemblies 300 are rotatably mounted on the frame 100, and a connecting rod 400 connects the two sets of swing arm assemblies 300. The pushing end of the drive cylinder 500 is connected to one set of swing arm assemblies 300, and the fixed end of the drive cylinder 500 is rotatably mounted on the frame 100 for driving the guide rail seat 200 to rise and fall. Both sets of swing arm assemblies 300 are connected to the guide rail seat 200. When the drive cylinder 500 pushes one set of swing arm assemblies 300, the connecting rod 400 drives the other set of swing arm assemblies 300 to move synchronously, and the two support arms 320 together lift the guide rail seat 200 to achieve raising and lowering. In one embodiment, the drive cylinder 500 is a hydraulic cylinder. It is understood that the drive cylinder 500 can also be a pneumatic cylinder, or other types of drive elements can be used, and this application does not limit this.

[0027] Please see Figure 1 and Figure 2Each swing arm assembly 300 includes a shaft 310 and a support arm 320. The shaft 310 is rotatably mounted on the frame 100, and the support arm 320 is fixedly connected to the shaft 310 to rotate synchronously with the shaft 310. Specifically, a bearing housing is mounted on the frame 100, and both ends of the shaft 310 are mounted in the bearing housing, allowing the shaft 310 to rotate relative to the frame 100 around its own axis. The support arm 320 is connected to the shaft 310 via a key and a keyway, allowing the support arm 320 to rotate synchronously with the shaft 310. Each swing arm assembly 300 includes two support arms 320, which are located close to both ends of the shaft 310. The two support arms 320 belonging to the same swing arm assembly 300 are arranged in a V-shape along the axial projection of the shaft 310 without angular offset. When the shaft 310 rotates, the support arms 320 swing and raise or lower the guide rail seat 200. In one embodiment, the shaft 310 is rotatably connected to the frame 100 via a mounted bearing. It is understood that the rotatable connection between the shaft 310 and the frame 100 can also be achieved through a bushing fit or other rotatable connection methods, and this application does not limit this to any particular method.

[0028] It can be seen that when the initial angles of the two swing arm assemblies 300 are inconsistent due to processing and installation errors, the position constraint of the two sets of swing arm assemblies 300 is changed by adjusting the length of the connecting rod 400, so that the rotation angles of the two sets of shafts 310 tend to be consistent, thereby correcting the swing angle deviation of the support arm 320, keeping the guide rail seat 200 horizontal, avoiding the problem of workpiece slippage caused by the tilt of the guide rail seat 200, and improving the installation and debugging efficiency and positioning accuracy of the exchange worktable.

[0029] Link 400 connects two sets of swing arm assemblies 300, and the length of link 400 is adjustable. Specifically, link 400 includes a main body and at least one adjusting member. The adjusting member is connected to the main body and can be adjusted relative to the main body along the length direction of link 400, thereby adjusting the length of link 400. Please refer to [link to relevant documentation]. Figure 1 and Figure 2In one embodiment, the main component is a sleeve 410, and the adjusting components are two screws 420, which are threaded to both ends of the sleeve 410. The internal threads at both ends of the sleeve 410 rotate in opposite directions, and the two screws 420 are respectively connected to two sets of swing arm assemblies 300. By rotating the sleeve 410, the two screws 420 are simultaneously screwed in or out, thereby adjusting the length of the connecting rod 400. During installation, rotating the sleeve 410 changes the length of the connecting rod 400, thereby changing the relative relationship of the rotation angles of the shafts 310 of the two sets of swing arm assemblies 300, correcting the swing angle deviation of the support arm 320, and keeping the guide rail seat 200 horizontal. It is understood that the length adjustment method of the connecting rod 400 is not limited to the threaded sleeve structure; other adjustable length connection structures such as telescopic sleeves with set screws for locking, double-ended screws with adjusting nuts, etc., can also be used. This application does not limit this.

[0030] To prevent the sleeve 410 and screw 420 from loosening due to vibration or force after adjustment, the following locking method can be used: In one embodiment, a thread-locking agent is applied to the threaded engagement between the sleeve 410 and the screw 420 to lock the length of the connecting rod 400. After the thread-locking agent cures, it bonds and locks the sleeve 410 and the screw 420 together, thus fixing the length of the connecting rod 400.

[0031] In another embodiment, a locking nut 430 is threaded onto the screw 420. The locking nut 430 abuts against the end face of the sleeve 410 to lock the length of the connecting rod 400. After adjustment, the locking nut 430 is tightened to abut against the end face of the sleeve 410, and the length of the connecting rod 400 is locked by the abutting force between the locking nut 430 and the end face of the sleeve 410.

[0032] It is understood that the two locking methods mentioned above can be used alone or in combination, and this application does not limit this.

[0033] Please see Figures 1 to 3Each set of swing arm assemblies 300 also includes a linkage arm 330, which is fixedly connected to the shaft 310 to rotate synchronously with the shaft 310. The linkage arm 330 is located in the middle section of the shaft 310. The two ends of the connecting rod 400 are respectively hinged to the linkage arms 330 of the two sets of swing arm assemblies 300, and the drive cylinder 500 is connected to the linkage arm 330 of one set of swing arm assemblies 300. The linkage arm 330 is used to receive the driving force of the drive cylinder 500 and the synchronous force of the connecting rod 400 and transmit them to the shaft 310, so that the support arm 320 only performs the function of lifting the guide rail seat 200. The linkage arm 330 and the support arm 320 each perform their respective functions. In one embodiment, the linkage arm 330 and the shaft 310 are connected by a keyway to achieve synchronous rotation. It is understood that the linkage arm 330 and the shaft 310 can be a separate structure and then fixedly connected, or they can be integrally formed with the shaft 310. This application does not limit this. In one embodiment, the connecting rod 400 may also be connected to the support arm 320 or other components that can rotate synchronously with the shaft 310 to achieve synchronous adjustment.

[0034] Please see Figure 3 In one embodiment, the linkage arm 330 connected to the drive cylinder 500 consists of two parallel arm plates 331. The connecting rod 400 has a first end, which includes two parallel connecting plates 440. The two arm plates 331 of the linkage arm 330 are located inside the two connecting plates 440 of the connecting rod 400. The hinge shaft passes sequentially through one connecting plate 440 of the connecting rod 400, one arm plate 331 of the linkage arm 330, the pushing end of the drive cylinder 500, the other arm plate 331 of the linkage arm 330, and the other connecting plate 440 of the connecting rod 400, so that the pushing end of the drive cylinder 500, the first end of the connecting rod 400, and one of the linkage arms 330 are all hinged to the same hinge shaft. All three share a single hinge point, allowing the thrust of the drive cylinder 500, the swing of the linkage arm 330, and the force transmission of the connecting rod 400 to converge at this joint, resulting in a compact structure and the shortest force transmission path. In one embodiment, the hinge shaft is a pin. It is understood that the hinge shaft can also be a bolt, and this application does not limit it to this.

[0035] Please see Figure 4 The support arm 320 and the linkage arm 330 are arranged at an angle of 40° to 50° along the axial projection of the shaft 310. This angle arrangement allows the support arm 320 and the linkage arm 330 to have different motion trajectories when the shaft 310 rotates. The support arm 320 is responsible for lifting the guide rail seat 200, while the linkage arm 330 is responsible for transmitting driving force and synchronous force. The division of labor between the two is clear and the structure is compact. It is understandable that if the angle is too small, the linkage arm 330 and the support arm 320 will be too close, resulting in a short lever arm and low force transmission efficiency; if the angle is too large, the structure will occupy a large space and the rigidity will decrease. The range of 40° to 50° can balance force transmission efficiency and structural compactness.

[0036] Please see Figure 5 In one embodiment, at least one end of the connecting rod 400 has a spherical cavity 450, in which a ball head 460 is fitted. The ball head 460 is rotatably accommodated within the spherical cavity 450, forming a ball joint connection. This allows for a certain angular deflection between the connecting rod 400 and the linkage arm 330, compensating for angular deviations of various components during installation and reducing assembly difficulty. The ball head 460 has a connecting hole for a hinge shaft to pass through, and the ball head 460 is hinged to the swing arm assembly 300 via a pivot shaft. It is understood that the spherical cavity 450 can be located at the end of the connecting rod 400 and the ball head 460 can be fixed to the swing arm assembly 300, or the ball head 460 can be fixed to the end of the connecting rod 400 and the spherical cavity 450 can be located on the swing arm assembly 300; this application does not limit this to either of these options.

[0037] Please see Figure 1 and Figure 2 The exchange workbench base also includes a proximity switch 600, which is mounted on the frame 100 and has two detection positions: a high position and a low position. The high position corresponds to the upper limit of the lifting stroke of the guide rail seat 200, and the low position corresponds to the lower limit of the lifting stroke of the guide rail seat 200. When the swing arm assembly 300 rotates to the upper limit position of the guide rail seat 200, the high-position proximity switch 600 is triggered and controls the drive cylinder 500 to stop extending; when the swing arm assembly 300 rotates to the lower limit position of the guide rail seat 200, the low-position proximity switch 600 is triggered and controls the drive cylinder 500 to stop retracting, thereby preventing the guide rail seat 200 from lifting beyond its stroke range. In one embodiment, the proximity switch 600 is a proximity switch. It is understood that the proximity switch 600 can also be a photoelectric sensor or other position detection element, and this application does not limit it in this regard.

[0038] This application also provides a lifting system, including the above-described exchange workbench base.

[0039] Based on the above structure, the working process of this exchange workbench base is as follows: During installation, the components are assembled according to the above structure. Due to processing and installation errors, the initial angles of the two sets of swing arm assemblies 300 may be inconsistent, causing the guide rail seat 200 to tilt. At this time, the sleeve 410 of the rotating connecting rod 400 is rotated. Since the internal threads at both ends of the sleeve 410 are turned in opposite directions, the two screws 420 are screwed in or out simultaneously, changing the length of the connecting rod 400, thereby adjusting the relative angular position of the two sets of swing arm assemblies 300 until the guide rail seat 200 is kept horizontal. Then, the length of the connecting rod 400 is locked by thread locking agent or locking nut 430.

[0040] During operation, the drive cylinder 500 extends to push the connected linkage arm 330, which drives the shaft 310 to rotate. The support arm 320 on the shaft 310 then swings upwards to lift the guide rail seat 200. The connecting rod 400 transmits the motion to the linkage arm 330 of another set of swing arm assemblies 300, causing the shaft 310 of the other set of swing arm assemblies 300 to rotate synchronously. The two sets of support arms 320 swing synchronously, and the guide rail seat 200 rises and falls smoothly. The inductive switch 600 detects the rotation amplitude of the swing arm assembly 300. The high-position inductive switch 600 triggers the control drive cylinder 500 to stop extending when the guide rail seat 200 reaches its upper limit position, and the low-position inductive switch 600 triggers the control drive cylinder 500 to stop retracting when the guide rail seat 200 reaches its lower limit position, completing one lifting stroke.

[0041] The exchange workbench base of this application embodiment connects two sets of swing arm assemblies 300 through an adjustable length connecting rod 400, which can correct the initial angle deviation of the two sets of swing arm assemblies 300 during installation, so that the guide rail seat 200 remains horizontal; the driving force of the drive cylinder 500 and the synchronous force of the connecting rod 400 are separated and transmitted through the linkage arm 330, and the structural division of labor is clear; the drive cylinder 500, the linkage arm 330 and the connecting rod 400 are compactly connected through the coaxial hinge, and the force transmission path is short and the structure is simple.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A base for an exchange workbench, characterized in that, include: frame; Guide rail base; Two sets of swing arm assemblies, each swing arm assembly including a shaft and a support arm, the shaft being rotatably mounted on the frame, the support arm being fixedly connected to the shaft to rotate synchronously with the shaft, and the support arm being hinged to the guide rail seat; A connecting rod is connected between the two sets of the swing arm assemblies. The connecting rod includes a main body and at least one adjusting member. The adjusting member is connected to the main body and can be adjusted relative to the main body along the length direction of the connecting rod to adjust the length of the connecting rod. A drive cylinder, connected to one of the sets of said swing arm assemblies, is used to drive the guide rail seat to rise and fall.

2. The exchange workbench base according to claim 1, characterized in that, The main body is a sleeve, and the adjusting component consists of two screws. The two screws are threaded to both ends of the sleeve, and the internal threads at both ends of the sleeve rotate in opposite directions. The two screws are respectively connected to two sets of the swing arm assemblies. By rotating the sleeve, the two screws are screwed in or out synchronously to adjust the length of the connecting rod.

3. The exchange workbench base according to claim 2, characterized in that, The threaded joint between the sleeve and the screw is coated with a thread-locking agent to lock the length of the connecting rod.

4. The exchange workbench base according to claim 2, characterized in that, A locking nut is also threaded onto the screw, and the locking nut abuts against the end face of the sleeve to lock the length of the connecting rod.

5. The exchange workbench base according to any one of claims 1 to 4, characterized in that, The swing arm assembly also includes a linkage arm, which is fixedly connected to the shaft to rotate synchronously with the shaft. The two ends of the connecting rod are respectively hinged to the linkage arms of two sets of the swing arm assemblies, and the drive cylinder is connected to the linkage arm of one set of the swing arm assemblies.

6. The exchange workbench base according to claim 5, characterized in that, The support arm and the linkage arm are arranged at an angle along the axial projection of the axis, and the angle is 40° to 50°.

7. The exchange workbench base according to claim 5, characterized in that, The drive cylinder has a push end, the connecting rod has a first end, and the push end, the first end, and one of the linkage arms are hinged together on the same hinge axis.

8. The exchange workbench base according to any one of claims 5 to 7, characterized in that, At least one end of the connecting rod has a spherical cavity, in which a ball head is fitted, and the ball head is connected to the linkage arm.

9. The exchange workbench base according to claim 1, characterized in that, It also includes a sensor switch, which is mounted on the frame and is used to detect the rotation amplitude of the two sets of swing arm assemblies and control the stroke of the drive cylinder.

10. A lifting system, characterized in that, Includes the exchange workbench base as described in any one of claims 1 to 9.

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