A polishing head with a lifting stop mechanism

Abstract

The utility model discloses a polishing grinding head with promote stop gear, including drive mechanism, outer shaft sleeve, sliding sleeve axle, grinding head and stop gear, drive mechanism fixed mounting is in outer shaft sleeve, sliding sleeve axle is vertically arranged in the axle hole of outer shaft sleeve, and the bottom of sliding sleeve axle is connected with grinding head, and the top of sliding sleeve axle is transmission connection with drive mechanism, and drive mechanism is used for driving sliding sleeve axle and moves along the own axis direction, stop gear installs in outer shaft sleeve, and stop gear is used for limiting sliding sleeve axle and moves upward relative to outer shaft sleeve. Through the rigid cooperation of outer shaft sleeve and sliding sleeve axle, the first level guide is established, and then the active locking of stop gear is superimposed to form double protection, and the position control precision is changed from the lifting dynamic adjustment of relying on drive mechanism to the external mechanical limiting. This breaks through the technical route of simply relying on electrical parameter compensation, solves the problem of grinding head lifting response delay, causes the problem of grinding head actual lifting height inaccuracy and further causes the grinding head avoidance position deviation.

Description

Technical Field

[0001] This utility model relates to the field of natural stone slab processing technology, and in particular to a polishing grinding head with a lifting and stopping mechanism. Background Technology

[0002] In the field of natural stone slab processing, marble slabs commonly suffer from irregular shapes such as missing edges and corners due to material characteristics and processing limitations, posing a significant challenge to subsequent polishing processes. During marble slab polishing, the grinding head needs to frequently perform raising and lowering movements to accommodate the irregular slab contours. If the grinding head's raising and lowering precision is insufficient, it will directly lead to missed polishing or the slab colliding with the grinding head (attaching abrasive), severely affecting the polishing quality and the finished product qualification rate.

[0003] In existing technologies, the industry typically uses program control to set the grinding head's clearance lifting height to achieve precise control of grinding head lifting. However, this technical solution places extremely high demands on the machining accuracy of mechanical parts and the response accuracy of electrical components. Furthermore, in practical applications, due to the limitations of mechanical transmission accuracy and the response delay of electrical components, the actual lifting height of the grinding head is difficult to consistently maintain the set value, leading to deviations in the grinding head's clearance position. This deviation not only easily causes problems such as abrasive material loss but also results in frequent missed polishing of critical areas such as the edges and corners of the slab, failing to meet the industrial production requirements for high-precision polishing of marble slabs and becoming a core technical bottleneck restricting the improvement of processing efficiency and product quality in the industry. Utility Model Content

[0004] In response to the problems raised in the background art, the purpose of this utility model is to propose a polishing grinding head with a lifting and stopping mechanism to solve the problem of poor lifting accuracy control of existing polishing grinding heads, which leads to missed polishing or abrasive material removal.

[0005] To achieve this objective, the present invention adopts the following technical solution: A polishing head with a lifting stop mechanism includes a drive mechanism, an outer bushing, a sliding sleeve shaft, a polishing head, and a stop mechanism. The drive mechanism is fixedly installed on the outer bushing; the sliding sleeve shaft is vertically arranged in the shaft hole of the outer bushing, the bottom of the sliding sleeve shaft is connected to the grinding head, and the top of the sliding sleeve shaft is connected to the drive mechanism for transmission. The drive mechanism is used to drive the sliding sleeve shaft to move along its own axis. The stop mechanism is installed on the outer bushing, and the stop mechanism is used to restrict the upward movement of the sliding sleeve shaft relative to the outer bushing.

[0006] Preferably, the stopping mechanism includes a mounting plate, a stopping cylinder, and a stopping plate; the outer side wall of the sliding sleeve shaft is provided with a stopping part; The mounting plate is installed on the outside of the outer bushing, the stop cylinder is installed on the mounting plate, the piston rod of the stop cylinder passes through the mounting plate and is connected to the stop plate, the stop plate passes through the through hole of the outer bushing and is engaged with the stop part, when the stop part is engaged with the stop plate, the stop plate restricts the axial upward movement of the sliding sleeve.

[0007] Preferably, the stop portion is a wedge-shaped groove, and a plurality of the wedge-shaped grooves are distributed parallel to each other along the axial direction of the sliding sleeve shaft; The stop plate is provided with a set of protruding teeth on the side away from the stop cylinder. The shape of the set of protruding teeth matches the shape of the wedge-shaped tooth groove. When the stop plate is in contact with the sliding sleeve shaft, the set of protruding teeth can mesh with the wedge-shaped tooth groove at the same horizontal height.

[0008] Preferably, the wedge-shaped groove and the inner wall of the outer bushing are inclined surfaces that slope downwards from the outside to the inside, and the wedge-shaped groove and the bottom of the sliding sleeve shaft are horizontal planes.

[0009] Preferably, the stopping mechanism further includes a guide rod, and the mounting plate is provided with a horizontally penetrating guide hole; One end of the guide rod passes through the guide hole and is connected to the stop plate; The axial direction of the guide rod is perpendicular to the axial direction of the sliding sleeve shaft, and the axial direction of the guide rod is parallel to the axial direction of the piston rod of the stop cylinder.

[0010] Preferably, the top of the outer bushing is provided with a top mounting plate, the fixing part of the drive mechanism is installed and connected to the top mounting plate, and the driving end of the drive mechanism passes through the top mounting plate and is connected to the sliding sleeve shaft.

[0011] Preferably, it further includes at least one set of auxiliary power mechanisms, wherein one set of auxiliary power mechanisms includes two lifting cylinders, and the two lifting cylinders are respectively symmetrically disposed on the outer side wall of the outer bushing; The piston rod of the lifting cylinder is connected to the grinding head, and the axial direction of the piston rod of the lifting cylinder is parallel to the axial direction of the sliding sleeve shaft.

[0012] Compared with the prior art, one of the above technical solutions has the following beneficial effects: By establishing a primary guide through the rigid fit between the outer bushing and the sliding sleeve shaft, and then superimposing the active locking of the stop mechanism to form a double guarantee, the position control accuracy is transformed from relying on the dynamic adjustment of the lifting and lowering mechanism of the drive mechanism to an external mechanical limit. This breaks through the technical route of simply relying on electrical parameter compensation, and solves the problem of grinding head lifting and lowering response delay, which leads to inaccurate actual lifting height of the grinding head and thus causes deviation in the grinding head avoidance position. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is an axial sectional view of one embodiment of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the stopping mechanism of this utility model.

[0014] The components include: drive mechanism 1, outer bushing 2, top mounting plate 21, sliding sleeve shaft 3, stop part 31, wedge tooth groove 311, grinding head 4, stop mechanism 5, mounting plate 51, guide hole 511, stop cylinder 52, stop plate 53, convex tooth group 531, guide rod 54, and lifting cylinder 6. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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 utility model 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 utility model.

[0017] Furthermore, the terms "first," "second," and "third" 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," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0018] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The following is in conjunction with the appendix Figures 1 to 4 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0020] A polishing head with a lifting stop mechanism includes a drive mechanism 1, an outer bushing 2, a sliding sleeve shaft 3, a grinding head 4, and a stop mechanism 5. The drive mechanism 1 is fixedly installed on the outer bushing 2; the sliding sleeve shaft 3 is vertically arranged in the shaft hole of the outer bushing 2, the bottom of the sliding sleeve shaft 3 is connected to the grinding head 4, and the top of the sliding sleeve shaft 3 is connected to the drive mechanism 1 for transmission. The drive mechanism 1 is used to drive the sliding sleeve shaft 3 to move along its own axis. The stop mechanism 5 is installed on the outer bushing 2, and the stop mechanism 5 is used to restrict the sliding sleeve shaft 3 from moving upward relative to the outer bushing 2.

[0021] This invention employs an outer bushing 2 and a sliding sleeve shaft 3 to form a guiding structure, and adds an active stop mechanism 5 to effectively eliminate position drift during the lifting process of the sliding sleeve shaft 3. By setting an independent mechanical stop mechanism 5 to directly restrict the upward movement of the sliding sleeve shaft 3, a rigid, non-elastic mechanical limit is provided for the core lifting motion. This method fundamentally avoids positioning deviations caused by signal delays, servo errors, or transmission backlashes in pure program control or electrical soft limiters, ensuring that the height of the grinding head 4 can be accurately locked after lifting and avoiding obstacles, greatly reducing the risk of missed polishing or over-polishing of plate edges and corners due to inaccurate avoidance height.

[0022] The stop mechanism 5 is installed on the outer bushing 2. Its limiting function does not depend on the accuracy and holding force of the drive mechanism 1. Specifically, the "drive" and "stop" functions are separated, making the stop function an independent and reliable safety link. The overall system has stronger resistance to electrical interference and mechanical vibration, and its stability is significantly higher than that of the scheme that completely relies on the self-locking of the drive system or continuous power supply to maintain the position.

[0023] Specifically, when the drive mechanism 1 drives the sliding sleeve shaft 3 to raise the grinding head 4 to the target height, the stop mechanism 5 immediately activates and locks the relative position between the outer bushing 2 and the sliding sleeve shaft 3. The sliding trajectory of the sliding sleeve shaft 3 within the shaft hole of the outer bushing 2 is rigidly constrained, ensuring the straightness of the grinding head 4's lifting path. When it is necessary to maintain the height of the grinding head 4, the stop mechanism 5 directly acts on the sliding sleeve shaft 3 to form a physical block, eliminating accidental upward movement of the sliding sleeve shaft 3 caused by transmission system backlash or electrical signal delay. This mechanical locking method is not limited by the response speed of the electrical system and can complete position fixation within milliseconds.

[0024] Compared to existing technologies, which rely on closed-loop control systems to adjust the grinding head position in real time, this invention cannot eliminate the inherent backlash in the mechanical transmission chain. This invention establishes a primary guide through the rigid fit between the outer bushing 2 and the sliding sleeve shaft 3, further enhanced by the active locking of the stop mechanism 5, creating a double guarantee. This transforms position control accuracy from relying on the dynamic adjustment of the drive mechanism to external mechanical limiting. This structural innovation breaks through the technical route of simply relying on electrical parameter compensation, fundamentally solving the problem of grinding head 4 position drift.

[0025] Furthermore, the stopping mechanism 5 includes a mounting plate 51, a stopping cylinder 52, and a stopping plate 53; the outer side wall of the sliding sleeve shaft 3 is provided with a stopping part 31; The mounting plate 51 is installed on the outside of the outer bushing 2. The stop cylinder 52 is installed on the mounting plate 51. The piston rod of the stop cylinder 52 passes through the mounting plate 51 and is connected to the stop plate 53. The stop plate 53 passes through the through hole of the outer bushing 2 and is engaged with the stop part 31. When the stop part 31 is engaged with the stop plate 53, the stop plate 53 restricts the upward movement of the sliding sleeve shaft 3.

[0026] When the sliding sleeve shaft 3 is raised to the set height, the stop cylinder 52 drives the stop plate 53 to move in a direction perpendicular to the axis of the sliding sleeve shaft 3, so that the stop plate 53 inserts into the stop part 31 of the sliding sleeve shaft. At this time, the displacement of the sliding sleeve shaft 3 in the lifting direction is physically blocked by the stop plate 53, forming a rigid limit. This mechanical locking method acts directly on the sliding sleeve shaft 3, avoiding the delay error between signal transmission and actuator in traditional electronic control systems. The fit design between the stop plate 53 and the through hole of the outer bushing 2 ensures that its movement trajectory is orthogonal to the axis of the sliding sleeve shaft 3, eliminating the limit failure caused by angular deviation. When the grinding head 4 performs the avoidance action, the lifting height of the sliding sleeve shaft 3 is uniquely determined by the contact position between the stop plate 53 and the stop part 31, and is not affected by mechanical transmission clearance or electrical response speed.

[0027] Furthermore, the stop part 31 is a wedge-shaped toothed groove 311, and a plurality of the wedge-shaped toothed grooves 311 are distributed parallel to each other along the axial direction of the sliding sleeve shaft 3; The stop plate 53 is provided with a toothed group 531 on the side away from the stop cylinder 52. The shape of the toothed group 531 matches the shape of the wedge-shaped tooth groove 311. When the stop plate 53 is in contact with the sliding sleeve shaft 3, the toothed group 531 can mesh with the wedge-shaped tooth groove 311 at the same horizontal height.

[0028] When the stop cylinder 52 drives the tooth assembly 531 to engage with the wedge-shaped tooth groove 311, the tooth assembly 531 and the wedge-shaped tooth groove 311 generate contact pressure, which forms both a constraint force in the radial direction of the sliding sleeve shaft 3 and a constraint force in the axial direction of the sliding sleeve shaft 3.

[0029] The axial distribution characteristics of several wedge-shaped toothed grooves 311 allow them to cover multiple positions along the lifting stroke of the sliding sleeve shaft 3, enabling the sliding sleeve shaft 3 to achieve engagement and limiting with the convex tooth group 531 of the stop plate at any height position.

[0030] Furthermore, the wedge-shaped groove 311 and the inner wall of the outer bushing 2 are inclined surfaces that slope downwards from the outside to the inside, and the wedge-shaped groove 311 and the bottom of the sliding sleeve shaft 3 are horizontal planes.

[0031] The wedge-shaped groove 311 is a recessed structure formed on the outer surface of the sliding sleeve shaft 3. The inclined direction of the slope extends downward from the outside to the inside, which is used to guide the stop plate 53 (the tooth assembly 531) to slide into the wedge-shaped groove 311 along the slope. The horizontal plane located at the lower end of the slope is used to restrict the downward sliding of the stop plate 53 (tooth assembly 531) relative to the sliding sleeve shaft 3 (equivalent to the stop mechanism 5 restricting the upward sliding of the sliding sleeve shaft 3), but does not restrict the downward sliding of the sliding sleeve shaft 3 relative to the stop plate 53.

[0032] Specifically, when the stop cylinder 52 pushes the stop plate 53 to move towards the sliding sleeve shaft 3, the convex tooth assembly 531 of the stop plate 53 first contacts the inclined surface of the wedge-shaped tooth groove 311. The inclined surface guides the convex tooth assembly 531 to slide downward along the inclined direction, so that the convex tooth assembly 531 can be smoothly embedded into the wedge-shaped tooth groove 311. When the convex tooth assembly 531 is fully embedded, the bottom surface of the convex tooth assembly 531 forms a surface contact with the bottom horizontal plane of the wedge-shaped tooth groove 311. At this time, when the sliding sleeve shaft 3 is subjected to an upward force from the drive mechanism 1, the horizontal plane of the wedge-shaped tooth groove 311 is restricted by the vertical contact surface, so that the sliding sleeve shaft 3 cannot move upward, thereby achieving the locking of the sliding sleeve shaft 3. When the grinding head 4 needs to be raised to avoid an obstacle, the stop cylinder 52 is vented, the piston rod of the stop cylinder 52 retracts, and the stop plate 53 is disengaged from the sliding sleeve shaft 3. The sliding sleeve shaft 3 drives the grinding head 4 to rise. The program disconnects the air passage of the stop cylinder 52 at a set time, the piston rod extends, and the stop plate 53 stops the sliding sleeve shaft 3 from rising, thus effectively controlling the lifting height of the grinding head 4. The grinding head 4 can descend in time to grind and polish the edges and corners.

[0033] Furthermore, the stop mechanism 5 also includes a guide rod 54, and the mounting plate 51 is provided with a horizontally penetrating guide hole 511; One end of the guide rod 54 passes through the guide hole 511 and is connected to the stop plate 53; The axial direction of the guide rod 54 is perpendicular to the axial direction of the sliding sleeve shaft 3, and the axial direction of the guide rod 54 is parallel to the axial direction of the piston rod of the stop cylinder 52.

[0034] The guide rod 54 passes through the guide hole 511 of the mounting plate 51 and connects to the stop plate 53, thus forcibly guiding the movement trajectory of the stop plate 53. When the stop cylinder 52 drives the stop plate 53 to move horizontally, the sliding path of the guide rod 54 in the guide hole 511 remains parallel to the thrust direction of the stop cylinder 52, ensuring that the stop plate 53 can only move in a preset direction. The parallel arrangement of the guide rod 54 and the piston rod of the stop cylinder 52 ensures that the thrust of the stop cylinder 52 is transmitted along the axis of the guide rod 54, reducing the interference of lateral forces on the stability of the movement.

[0035] Furthermore, the top of the outer bushing 2 is provided with a top mounting plate 21, the fixing part of the drive mechanism 1 is installed and connected to the top mounting plate 21, and the driving end of the drive mechanism 1 passes through the top mounting plate 21 and is connected to the sliding sleeve shaft 3.

[0036] The top mounting plate 21 is rigidly set on the top of the outer bushing 2, forming a stable support platform. The fixed part of the drive mechanism 1 is mounted on the top mounting plate 21, so that the vibration of the drive mechanism 1 during operation is absorbed by the top mounting plate 21, avoiding the deviation of the lifting trajectory of the sliding sleeve shaft 3 due to its own shaking.

[0037] Furthermore, after the drive shaft of the drive mechanism 1 passes through the central guide hole of the top mounting plate 21, it is connected to the top of the sliding sleeve shaft 3 through a coupling. The guide hole of the top mounting plate 21 forms a radial constraint on the output shaft, reducing the radial swing amplitude during the transmission process. During the lifting and lowering process, the straightness of the sliding sleeve shaft 3's motion trajectory is maintained by the rigid connection between the top mounting plate 21 and the drive end of the drive mechanism 1, thereby improving the lifting accuracy.

[0038] Furthermore, it also includes at least one set of auxiliary power mechanisms, one set of auxiliary power mechanisms including two lifting cylinders 6, the two lifting cylinders 6 being symmetrically arranged on the outer side wall of the outer bushing 2; The piston rod of the lifting cylinder 6 is connected to the grinding head 4, and the axial direction of the piston rod of the lifting cylinder 6 is parallel to the axial direction of the sliding sleeve shaft 3.

[0039] When the drive mechanism 1 drives the sliding sleeve shaft 3 to rise and fall, the lifting cylinder 6 of the auxiliary power mechanism synchronously outputs driving force. The piston rods of the two lifting cylinders 6 act directly on the grinding head 4, forming a superposition of thrust in the same direction as the drive mechanism 1. The symmetrically arranged lifting cylinders 6 counteract lateral loads by applying force evenly, avoiding jamming or offset caused by uneven force during the movement of the sliding sleeve shaft 3. When the drive mechanism 1 and the auxiliary power mechanism work together, if the drive mechanism 1 has insufficient power due to mechanical backlash or response delay, the auxiliary power mechanism can immediately supplement the driving force to maintain the movement accuracy of the sliding sleeve shaft 3.

[0040] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A polishing head with a lifting stop mechanism, characterized in that: Includes drive mechanism, outer bushing, sliding sleeve shaft, grinding head and stop mechanism; The drive mechanism is fixedly installed on the outer bushing; the sliding sleeve shaft is vertically arranged in the shaft hole of the outer bushing, the bottom of the sliding sleeve shaft is connected to the grinding head, and the top of the sliding sleeve shaft is connected to the drive mechanism for transmission. The drive mechanism is used to drive the sliding sleeve shaft to move along its own axis. The stop mechanism is installed on the outer bushing, and the stop mechanism is used to restrict the upward movement of the sliding sleeve shaft relative to the outer bushing.

2. A polishing head with a lifting stop mechanism according to claim 1, characterized in that: The stopping mechanism includes a mounting plate, a stopping cylinder, and a stopping plate; the outer side wall of the sliding sleeve shaft is provided with a stopping part; The mounting plate is installed on the outside of the outer bushing, the stop cylinder is installed on the mounting plate, the piston rod of the stop cylinder passes through the mounting plate and is connected to the stop plate, the stop plate passes through the through hole of the outer bushing and is engaged with the stop part, when the stop part is engaged with the stop plate, the stop plate restricts the axial upward movement of the sliding sleeve.

3. A polishing head with a lifting stop mechanism according to claim 2, characterized in that: The stop part is a wedge-shaped tooth groove, and several wedge-shaped tooth grooves are distributed parallel to each other along the axial direction of the sliding sleeve shaft; The stop plate is provided with a set of protruding teeth on the side away from the stop cylinder. The shape of the set of protruding teeth matches the shape of the wedge-shaped tooth groove. When the stop plate is in contact with the sliding sleeve shaft, the set of protruding teeth can mesh with the wedge-shaped tooth groove at the same horizontal height.

4. A polishing head with a lifting stop mechanism according to claim 3, characterized in that: The wedge-shaped groove and the inner wall of the outer bushing have a downward sloping surface from the outside to the inside, and the wedge-shaped groove and the bottom of the sliding sleeve shaft have a horizontal plane.

5. A polishing head with a lifting stop mechanism according to claim 2, characterized in that: The stopping mechanism also includes a guide rod, and the mounting plate is provided with a horizontal through guide hole; One end of the guide rod passes through the guide hole and is connected to the stop plate; The axial direction of the guide rod is perpendicular to the axial direction of the sliding sleeve shaft, and the axial direction of the guide rod is parallel to the axial direction of the piston rod of the stop cylinder.

6. A polishing head with a lifting stop mechanism according to claim 1, characterized in that: The top of the outer bushing is provided with a top mounting plate, the fixed part of the drive mechanism is installed and connected to the top mounting plate, and the drive end of the drive mechanism passes through the top mounting plate and is connected to the sliding sleeve shaft.

7. A polishing head with a lifting stop mechanism according to claim 6, characterized in that: It also includes at least one set of auxiliary power mechanisms, wherein one set of auxiliary power mechanisms includes two lifting cylinders, and the two lifting cylinders are respectively symmetrically arranged on the outer side wall of the outer bushing; The piston rod of the lifting cylinder is connected to the grinding head, and the axial direction of the piston rod of the lifting cylinder is parallel to the axial direction of the sliding sleeve shaft.

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