A press assembly for a grinder

Abstract

This utility model relates to a pressing assembly for a grinding machine, including a support base, a crank drive arm, and a connecting rod disposed on the worktable of the grinding machine. One end of the connecting rod is rotatably connected to the support base via a hinge block, and the other end of the connecting rod is hinged to a pressing block. The crank drive arm is connected to the middle of the connecting rod and is connected to a power source. The crank drive arm is connected to the power source via a crankshaft. The crank drive arm drives the connecting rod to rotate relative to the support base, thereby causing the pressing block to move up and down relative to the workpiece on the worktable. This allows the pressing block to have a pressing position where it presses down on the workpiece and a separating position where it is lifted up and separated from the workpiece. The rotational motion of the crankshaft is converted into a driving force that moves the pressing block. The operator can indirectly adjust the position of the pressing block by driving the crankshaft, which is convenient for adjustment, has high positioning efficiency, high adjustment accuracy, convenient operation, and good stability.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine equipment technology, and specifically to a grinding machine pressure assembly. Background Technology

[0002] A grinding machine is a machine tool used for precision grinding of workpieces. It mainly achieves the finishing of the workpiece surface by rotating the grinding wheel (grinding head). Its core function is to improve the dimensional accuracy, shape accuracy and surface finish of the workpiece.

[0003] Grinding machines mainly include:

[0004] Spindle: The core component that drives the grinding wheel to rotate and provides cutting power;

[0005] Grinding head: includes the grinding wheel and its drive device, and directly contacts the workpiece to perform grinding;

[0006] Worktable: Supports and fixes the workpiece, and can move along the X / Y / Z axes to achieve positioning;

[0007] Feed device: controls the movement of the worktable or grinding head to ensure precise cutting feed.

[0008] The positioning device on the worktable of the grinding machine positions the workpiece to keep it stable during grinding, thereby ensuring machining accuracy.

[0009] In traditional grinding machines, the clamping structure works in conjunction with the worktable to position the workpiece vertically, ensuring its stability during grinding. The clamping structure in existing grinding machines typically consists of an adjustable clamping block, and often relies on manual adjustment, which presents the following technical problems:

[0010] Poor adaptability: Pure pressure blocks are usually tightened by manual adjustment and fixed installation, making it difficult to dynamically adjust the clamping force according to the height, length or material properties of the workpiece;

[0011] Low positioning efficiency: Manual adjustment requires stopping the machine, opening the protective cover on the worktable, and manually adjusting and fixing it, which is inefficient. Summary of the Invention

[0012] The purpose of this invention is to develop a pressing assembly for a grinding machine to solve the problem that the pressing structure of a grinding machine is difficult to adjust quickly and accurately in the prior art, thereby improving the adaptability and ease of operation of the pressing structure.

[0013] This utility model is achieved through the following technical solution:

[0014] A clamping assembly for a grinding machine includes a support base, a crank drive arm, and a connecting rod disposed on the worktable of the grinding machine. One end of the connecting rod is rotatably connected to the support base via a hinge block, and the other end of the connecting rod is hinged to a clamping block. The crank drive arm is connected to the middle of the connecting rod, and the crank drive arm is connected to a power source via a crankshaft. The crank drive arm drives the connecting rod to rotate relative to the support base, thereby causing the clamping block to move up and down relative to the workpiece on the worktable, so that the clamping block has a clamping position where it presses down on the workpiece and a separating position where it is lifted up and separated from the workpiece.

[0015] The structure of the crank drive arm and crankshaft is existing technology. The power source drives the crankshaft to rotate, which in turn drives the crank arm to perform regular reciprocating motion. In this embodiment, those skilled in the art can choose a suitable crankshaft and crank arm, as long as they can drive the connecting rod to rotate relative to the support seat and move up and down relative to the workpiece.

[0016] The beneficial effects of the above technical solution are as follows: the force transmission through the crank drive arm-connecting rod mechanism drives the pressure block to press down, converting the rotational motion of the crankshaft into a driving force that moves the pressure block. The operator can indirectly adjust the position of the pressure block by driving the crankshaft. The power source of the crank drive arm can be a handle or a motor, which is convenient to adjust from the outside of the workbench guard, resulting in high positioning efficiency. There is no need to manually move and fix the position of the pressure block, resulting in high adjustment accuracy. It can also avoid the problem of uneven pressure caused by oil / air pressure fluctuations when the hydraulic or pneumatic pressing device extends or retracts in a straight line, making it easy to operate and stable.

[0017] In one possible implementation, it further includes a first drive assembly and a movable seat disposed on the worktable, wherein the support seat and the crank drive arm are both disposed on the movable seat; the first drive assembly drives the movable seat to move laterally on the worktable.

[0018] In one possible implementation, the first drive assembly includes a first lead screw arranged laterally on the worktable and a first gear disk that drives the first lead screw, the first gear disk being disposed within a movable seat.

[0019] In one possible implementation, the grinding machine has a grinding head, the worktable is arranged laterally, and a spindle box for driving the grinding head is arranged longitudinally relative to the worktable, and the spindle box is longitudinally slidable to move closer to or further away from the worktable.

[0020] In one possible implementation, a sliding adjustment assembly is provided between the spindle box and the frame of the grinding machine; the sliding adjustment assembly includes a guide rail and a drive motor that drives the spindle box to slide longitudinally along the guide rail.

[0021] In one possible implementation, the worktable is further provided with two side positioning components, which include a left positioning block and a right positioning block that respectively limit the workpiece on both sides laterally. Between the left positioning block and the right positioning block is a grinding station for placing the workpiece, and the pressure block is located above the grinding station.

[0022] In one possible implementation, it further includes a left push rod and a right push rod that drive the left positioning block and the right positioning block to move laterally, respectively. The left push rod and / or the right push rod has a push rod base, and the push rod base is connected to a second drive assembly. The second drive assembly drives the push rod base to move laterally on the worktable.

[0023] In one possible implementation, the second drive assembly includes a second lead screw and a second gear disk that drives the second lead screw, the second gear disk being disposed within the push rod base. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the grinding machine in an embodiment of this utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the grinding machine behind the hidden protective cover;

[0026] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 4 This is a schematic diagram of the combined structure of the pressing assembly and the two side positioning assemblies in an embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the pressing assembly structure in an embodiment of the present invention;

[0029] Figure 6 for Figure 5 Cross-sectional view of the medium-pressure material assembly;

[0030] Figure 7 for Figure 3 A schematic diagram of the positioning plate structure in the middle;

[0031] Figure 8 This is a schematic diagram of the safety lock of the grinding machine in an embodiment of this utility model.

[0032] In the diagram, 1. Positioning backplate; 11. Positioning base plate; 12. Triangular reinforcing plate; 13. Backplate drive platform; 14. Extension plate; 2. Pressing assembly; 21. Connecting rod; 211. Hinge block; 22. Pressing block; 23. Support seat; 24. Crank drive arm; 25. Moving seat; 26. First lead screw; 3. Two side positioning assemblies; 31. Left positioning block; 311. Left push rod; 32. Right positioning block; 321. Right push rod; 33. Push rod base; 4. Spindle box; 6. Workpiece; 7. Worktable; 71. Protective cover; 72. Operating door; 73. Door handle; 81. First lock body; 82. Second lock body. Detailed Implementation

[0033] First, those skilled in the art should understand that the following embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0034] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0035] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] To make the objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments are described in detail below with reference to the accompanying drawings.

[0037] like Figures 1 to 8 As shown, this embodiment provides a grinding machine with a grinding machine clamping assembly, including:

[0038] Worktable 7: set horizontally for supporting and fixing workpieces, including positioning components for multi-directional positioning of workpieces;

[0039] Grinding head: includes the grinding wheel and its drive device, and directly contacts the workpiece to perform grinding;

[0040] Spindle box 4: Longitudinally positioned relative to the worktable 7, used to drive the grinding wheel to rotate and provide grinding power.

[0041] The spindle box 4 is longitudinally slidable relative to the worktable 7, allowing the grinding head to extend into the grinding station on the worktable 7 to grind the workpiece.

[0042] The positioning components in the grinding machine include a positioning plate, a pressure assembly, and two side positioning assemblies, with the following specific structure:

[0043] 1. A positioning plate 1 is connected to a positioning base plate 11 and a plate drive platform 13, with the positioning plate 1 perpendicularly connected to the positioning base plate 11. A triangular reinforcing plate 12 connects the positioning plate 1 and the positioning base plate 11. A grinding station is provided between the positioning plate 1 and the spindle box 4. The positioning plate drive platform 13 is driven to move by a servo motor, thereby moving the positioning plate 1 closer to or away from the grinding station. The relative position of the positioning plate 1 and the spindle box 4 in the longitudinal direction is adjusted by the servo motor, so that the positioning plate can engage with workpieces of different sizes, ensuring the stability of the workpiece when the grinding head is processing it.

[0044] The positioning plate is driven by a servo motor, eliminating the need for manual adjustment after machine shutdown. The servo motor-driven positioning plate moves precisely and stably, ensuring that the relative positional error between the positioning plate and the grinding wheel is less than the material's allowable tolerance. Furthermore, a triangular reinforcing plate is installed between the positioning plate and the servo motor to avoid vibration or machining errors in high-speed grinding scenarios, ensuring machining accuracy.

[0045] The positioning plate 1 is fixedly connected to the positioning base plate 11 and the triangular reinforcing plate 12. The triangular reinforcing plate 12 is a right triangle, and the two right-angled sides of the triangular reinforcing plate 12 are respectively connected to the positioning plate 1 and the positioning base plate 11.

[0046] The positioning plate 1 is detachably connected to an extension plate 14 on one side near the workpiece 6. The length of the extension plate 14 in the lateral direction is not less than the length of the grinding station in the lateral direction.

[0047] II. The pressing assembly 2 includes a support base 23, a crank drive arm 24, and a connecting rod 21 connected to the movable seat 25. One end of the connecting rod 21 is rotatably connected to the support base 23 via a hinge block 211, and the other end of the connecting rod 21 is hinged to a pressing block 22. The crank drive arm 24 is connected to the middle of the connecting rod 21. The crank drive arm 24 is connected to a power source via a crankshaft. The crank drive arm 24 drives the connecting rod 21 to rotate around the support base 23, thereby causing the pressing block 22 to move relative to the workpiece 6, so that the pressing block 22 has a pressing position where it presses down on the workpiece 6 and a separating position where it is lifted up and separated from the workpiece 6.

[0048] The first driving assembly drives the movable seat 25 to move laterally relative to the workpiece 6; the first driving assembly includes a first lead screw 26 laterally disposed on the worktable 7 and a first gear disk that is in transmission cooperation with the first lead screw 26, the first gear disk being disposed inside the movable seat 25.

[0049] A clamping assembly for clamping and positioning the workpiece is set above the worktable 7 of the grinding machine. The workpiece 6 is placed on the grinding station, and the movable seat 25 of the clamping assembly is set on one side of the grinding station, and the clamping block 22 is located above the grinding station.

[0050] The crank-driven arm-connecting rod mechanism transmits force to push the pressure block down, converting rotational motion into vertical pressure. It has low requirements for the height of the processing space and high mechanical rigidity, which can avoid the problem of uneven pressure caused by oil pressure fluctuations in traditional hydraulic or pneumatic pressing systems.

[0051] 3. The two-sided positioning components 3 are used to limit the workpiece 6 laterally on both sides. They include a left positioning block 31 and a right positioning block 32, and a left push rod 311 and a right push rod 321 that drive the left positioning block 31 and the right positioning block 32 respectively. The left push rod 311 and / or the right push rod 321 are connected to the second driving component through the push rod base 33. The second driving component drives the push rod base 33 to move laterally on the worktable 7, thereby adjusting the position of the left positioning block 31 and the right positioning block 32 on the worktable 7 and the relative position of the left and right positioning blocks.

[0052] The second drive assembly includes a second lead screw arranged laterally on the worktable 7 and a gear disk that drives the second lead screw. The gear disk is disposed inside the push rod base 33. In this embodiment, the first lead screw 26 and the second lead screw are two lead screws arranged parallel to each other on the worktable 7. The movable seat 25 also serves as one of the push rod bases 33. The movable seat 25 and the push rod base 33 can move laterally independently on the worktable 7 to adjust the position of the pressing assembly and the positioning assemblies on both sides.

[0053] By adjusting the relative positions of the left and right pressure blocks, the size of the grinding station between the left and right pressure blocks can be adjusted, which is convenient for flexible adjustment according to the number or volume of workpieces.

[0054] The left and right pressure blocks are both located in front of the positioning plate and below the pressure assembly. The left and right pressure blocks are used to position the two sides of the workpiece to be processed, ensuring that the position of the workpiece in the lateral direction matches the position of the grinding head, and ensuring the stable lateral positioning of the workpiece when the grinding head processes the workpiece.

[0055] The aforementioned positioning plate 1, pressure assembly 2, and two side positioning assemblies 3 work together to form a grinding station that positions the workpiece in multiple directions, ensuring the stability of the workpiece during grinding.

[0056] Furthermore, the workbench 7 is equipped with a protective cover 71, and the grinding head and operating station are located inside the protective cover 71. The protective cover 71 is equipped with an operating door 72 and a safety lock 8. The operating door is equipped with a door handle 73. The grinding head is driven by a grinding head drive device. The safety lock 8 includes a controller, a first lock body 81 installed on the protective cover 71, a second lock body 82 installed on the operating door 72, and a locking element for locking. The controller is electrically connected to the grinding head drive device and is used to receive start and stop signals from the grinding head drive device.

[0057] The locking element has a locked state in which the first lock body 81 and the second lock body 82 are locked together, and an unlocked state in which the first lock body 81 and the second lock body 82 can be displaced relative to each other; the controller is electrically connected to the locking element and is used to control the action of the locking element to realize the switching between the locked state and the unlocked state.

[0058] Specifically, the input terminal of the controller is electrically connected to the start / stop signal output terminal of the grinding head drive device; the output terminal of the controller is connected to the locking element through a control circuit. Those skilled in the art will understand that the locking element can be a latch, which is driven to move by the controller through the control circuit (a conventional setting of an electric lock).

[0059] The safety lock also includes a timing module electrically connected to the controller and the locking element, the timing module including an RC delay circuit or a 555 timer chip.

[0060] The controller receives and judges the start and stop signals of the grinding head drive device. The control circuit controls the power supply of the locking element according to the controller's judgment, so as to switch the locking element between the locked state and the unlocked state. The specific structure and control method of the locking element are not the innovation of this patent. You can refer to the mature electronic lock structure on the market and realize the locking and unlocking of the lock through the circuit.

[0061] Specifically, the unlocking / locking state switching of the safety lock can be implemented based on PLC control, electromagnetic coils, or other specific methods. Existing technologies already have products or circuit designs that implement such control, as well as mature products such as electric locks, which will not be elaborated here. One embodiment can be: when the grinding head drive device is in the power-on state, the controller receives the power-on signal and then controls the electromagnetic coil to continuously energize through the control circuit to generate a magnetic field, which attracts the magnetic latch (locking element) of the safety lock, thereby maintaining the locked state of the safety lock. When the grinding head drive device is in the power-off state, the controller receives the power-off signal, the control circuit no longer energizes the electromagnetic coil, and the latch can be unlocked manually / automatically.

[0062] The timing module is used to keep the locking element locked for a set period of time after the grinding head drive device stops running.

[0063] The timing module can use existing technologies such as RC delay circuits or 555 timer chips. How to achieve timing or delay is not the technical innovation of this patent.

[0064] This timing module can maintain the safety lock in a locked state for a period of time after the grinding head drive device stops. This is because after the grinding machine stops, the grinding wheel still needs one to three minutes to return to a stationary state. Opening the protective cover during this period still poses a safety hazard.

[0065] The safety lock is connected to the drive unit of the grinding head via a signal. When the drive unit is first turned on, even if the grinding wheel rotates slowly or cannot rotate due to a malfunction, the controller receives the start-up signal and uses the locking mechanism to keep the safety lock locked, preventing workers from approaching the grinding wheel and avoiding accidental activation. When the grinding wheel is rotating normally at high speed, the controller keeps the safety lock locked and prevents workers from approaching the grinding wheel. During the two-hour shutdown, the timing module is in the countdown period, and the safety lock remains locked, preventing workers from approaching the grinding wheel. After the two-hour shutdown, the grinding wheel stops rotating, the timing module finishes its countdown, and the controller no longer controls the locking mechanism to maintain the locked state, allowing the operating door 72 to open relative to the protective cover. This ensures worker safety, equipment safety compliance, and promotes the industry's progress towards the goal of "zero accidents."

[0066] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0067] In the description of this application, the reference to terms such as "this embodiment," "an embodiment," etc., means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A clamping assembly for a grinding machine, characterized in that: Includes a support base (23), a crank drive arm (24), and a connecting rod (21) mounted on the worktable (7) of the grinding machine. One end of the connecting rod (21) is rotatably connected to the support base (23) via a hinge block (211), and the other end of the connecting rod (21) is hinged to a pressure block (22). The connecting rod (21) is connected to the crank drive arm (24) at the middle position. The crank drive arm (24) is connected to the power source through the crankshaft. The crank drive arm (24) drives the connecting rod (21) to rotate relative to the support seat (23) to drive the pressure block (22) to move relative to the worktable (7), so that the pressure block (22) has a pressing position that presses the workpiece (6) downward and a separation position that lifts up and separates from the workpiece (6).

2. The material clamping assembly of the grinding machine according to claim 1, characterized in that: It also includes a first drive assembly and a movable seat (25) disposed on the worktable (7), wherein the support seat (23) and the crank drive arm (24) are both disposed on the movable seat (25); The first drive component drives the movable seat (25) to move laterally on the worktable (7).

3. The material clamping assembly of the grinding machine according to claim 2, characterized in that: The first drive assembly includes a first lead screw (26) arranged laterally on the worktable (7) and a first gear disk that drives the first lead screw (26). The first gear disk is disposed in the movable seat (25).

4. The material clamping assembly of the grinding machine according to claim 1, characterized in that: The grinding machine has a grinding head, the worktable (7) is arranged laterally, the spindle box (4) for driving the grinding head is arranged longitudinally relative to the worktable (7), and the spindle box (4) can slide longitudinally to approach or move away from the worktable (7).

5. The material clamping assembly of the grinding machine according to claim 4, characterized in that: A sliding adjustment assembly is provided between the spindle box (4) and the frame of the grinding machine; the sliding adjustment assembly includes a guide rail and a drive motor that drives the spindle box (4) to slide longitudinally along the guide rail.

6. The material clamping assembly of the grinding machine according to claim 1, characterized in that: The worktable (7) is also provided with two side positioning components (3). The two side positioning components (3) include a left positioning block (31) and a right positioning block (32) that limit the workpiece (6) on both sides laterally. The grinding station between the left positioning block (31) and the right positioning block (32) is used to place the workpiece (6). The pressure block (22) is located above the grinding station.

7. The material clamping assembly of the grinding machine according to claim 6, characterized in that: It also includes a left push rod (311) and a right push rod (321) that drive the left positioning block (31) and the right positioning block (32) to move laterally, respectively. The left push rod (311) and / or the right push rod (321) have push rod bases (33). The push rod bases (33) are connected to a second drive assembly, which drives the push rod bases (33) to move laterally on the worktable (7).

8. The material clamping assembly of the grinding machine according to claim 7, characterized in that: The second drive assembly includes a second lead screw and a second gear disk that drives the second lead screw, the second gear disk being disposed within the push rod base (33).

Images