Clamp for end cover polishing

Abstract

The utility model relates to the technical field of end cover polishing, and discloses an end cover polishing clamp which comprises an installation block, a sliding groove is formed in the lower surface of the installation block, two moving structures are arranged on the outer surface of a two-way screw rod, downward pressing air cylinders are arranged at the lower ends of the two moving structures, and buffering structures are arranged at the output ends of the two downward pressing air cylinders. Universal balls are arranged at the lower ends of the two buffer structures, the moving structure comprises a sliding block, a connecting base is arranged on the lower surface of the sliding block, a downward pressing air cylinder is installed on the lower surface of the connecting base, and a lubricating assembly is arranged on the outer surface of the sliding block. According to the buffering structure, through three mechanisms of elastic buffering, damping energy consumption and mechanical limiting, the contact mode of the universal ball and the end cover is converted into gradual change flexible loading from rigid transient impact, the stress concentration and damage risk caused by rigid point contact of a traditional clamp are completely avoided, and meanwhile stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of end cap polishing technology, specifically to a fixture for end cap polishing. Background Technology

[0002] End cap polishing is a surface finishing process for end caps (end-sealed components) of equipment such as motors, pumps, and compressors. It is a surface treatment technology that removes microscopic unevenness on the end cap surface through mechanical, chemical, or electrochemical methods to achieve specific roughness, gloss, or functional requirements.

[0003] The utility model patent application with publication number "CN222021269U" discloses a polishing table for motor end caps, which mainly consists of an operating table, a rotating seat, a rotating mechanism, a positioning component, and a fixing component. This technical solution enables the polishing device to polish the inner and outer rings of different planes on the motor end cap, improving the practicality of the polishing device and simplifying the positioning and clamping operation of the polishing device on the motor end cap. At the same time, the drive motor in the fixing component drives the bidirectional threaded rod to rotate, causing the two nut seats to move relative to each other to adjust the distance between the two universal balls. Then, the downward pressure cylinder pushes the universal balls to abut against the upper surface of the end cap, squeezing and fixing the end cap, which helps to improve the stability of the end cap during rotation.

[0004] The fixing component in the motor end cover polishing table disclosed in the above document has the following defects: When the fixing component is in use, if the cylinder pressure is not precisely controlled (such as without a pressure regulating valve or overpressure protection), the universal ball will form a rigid point contact with the end cover surface, resulting in local stress concentration, which may press out dents and affect the finished end cover. Therefore, there is a potential risk of damage during the process of the pressing cylinder pushing the universal ball to apply pressure to the end cover. Utility Model Content

[0005] The purpose of this utility model is to provide a fixture for polishing end caps, which solves the problem that in existing fixing fixtures, the universal ball forms a rigid point contact with the surface of the end cap, resulting in local stress concentration and potential damage risk.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a fixture for polishing end caps, comprising a mounting block, a groove on the lower surface of the mounting block, a bidirectional screw rotatably connected to the inner surface of the groove, a drive motor mounted on one side of the mounting block, the output end of the drive motor being mounted to the bidirectional screw via a coupling, an opening on the outer surface of the mounting block extending into the groove, two moving structures on the outer surface of the bidirectional screw, each moving structure having a pressing cylinder at its lower end, a buffer structure at the output end of each pressing cylinder, and a universal ball at the lower end of each buffer structure, each moving structure including a slider, a connecting seat on the lower surface of the slider, a pressing cylinder mounted on the lower surface of the connecting seat, and a lubrication assembly on the outer surface of the slider.

[0008] Furthermore, the slider is slidably connected to the outer surface of the bidirectional screw, and one end of the slider is located inside the groove and moves along the axis of the groove.

[0009] Furthermore, the buffer structure includes a housing, the upper surface of which is provided with a mounting seat, the output end of the downward pressure cylinder is fitted inside the mounting seat, the lower surface of which is provided with a first cover plate, and a sliding rod is slidably connected inside the housing, one end of which passes through the first cover plate and is fitted with a universal ball.

[0010] Furthermore, a damping telescopic rod is installed on the inner top of the housing, and the telescopic end of the damping telescopic rod is fitted onto the upper surface of the slide rod. A spring is sleeved on the outer surface of the damping telescopic rod, with one end of the spring installed on the inner top of the housing and the other end of the spring installed on the upper surface of the slide rod.

[0011] Furthermore, a limiting groove is formed on the inner surface of the housing, and a limiting block is provided on the outer surface of the slide rod, with the limiting block slidably connected inside the limiting groove.

[0012] Furthermore, the lubrication assembly includes a housing, a second cover plate is mounted on the upper surface of the housing, the housing is mounted on the outer surface of the slider, an oil outlet hole is provided on the outer surface of the housing, a ball is rotatably connected inside the oil outlet hole, a sponge block is provided inside the housing, and an oil inlet hole is provided on the outer surface of the housing.

[0013] This utility model has the following beneficial effects:

[0014] (1) When the universal ball contacts the end cap surface, the slide rod slides upward along the housing axis under the reaction force. The slide rod moves upward and continuously compresses the spring, gradually compressing it from the free state to the preset stroke limit. The spring absorbs part of the initial impact energy through elastic deformation. The damping telescopic rod connected in parallel with the spring contracts synchronously. The hydraulic oil inside the rod flows through the throttle hole to generate nonlinear damping force, converting the remaining impact energy into heat energy for dissipation. When the spring is compressed to the limit position, the damping telescopic rod fully contracts to form a rigid stop. At this time, the output end of the downward cylinder reaches the maximum stroke, and the system enters the constant pressure holding state. At the same time, the limit block and the housing cooperate to constrain the rotation of the slide rod, ensuring that the force direction is perpendicular. The buffer structure, through the triple mechanism of elastic buffering, damping energy dissipation and mechanical limit, changes the contact mode between the universal ball and the end cap from rigid transient impact to gradual flexible loading, completely solving the stress concentration and damage risk caused by rigid point contact in traditional clamps, while improving stability.

[0015] (2) In this invention, lubricating oil is injected into the housing through the oil inlet hole. The lubricating liquid inside the housing is absorbed and stored by the sponge block. When the slider moves along the axis of the bidirectional screw, the housing moves with the slider. During the movement, the ball bearings are subjected to the frictional force of the bidirectional screw, causing the ball bearings to rotate. When the ball bearings rotate, the ball bearings covered with lubricating oil come into contact with the surface of the bidirectional screw, lubricating the surface of the bidirectional screw. This allows the lubricating oil to be evenly applied to the surface of the bidirectional screw, thereby reducing the frictional resistance between the slider and the bidirectional screw, avoiding the slider jamming caused by uneven friction, and improving the stability of the slider movement.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model during assembly;

[0019] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 3 This is an exploded view of a partial structure of the present invention;

[0021] Figure 4 This is a cross-sectional view of the buffer structure of this utility model;

[0022] Figure 5 This is a cross-sectional view of the lubrication component structure of this utility model;

[0023] The attached diagram lists the components represented by each number as follows:

[0024] In the diagram: 1. Mounting block; 101. Through port; 2. Bidirectional screw; 3. Drive motor; 4. Moving structure; 401. Slider; 402. Connecting seat; 403. Lubrication assembly; 4031. Housing; 4032. Second cover plate; 4033. Ball bearing; 4034. Sponge block; 4035. Oil inlet; 5. Pressing cylinder; 6. Buffer structure; 601. Housing; 602. Mounting seat; 603. First cover plate; 604. Slide rod; 605. Damping telescopic rod; 606. Spring; 607. Limiting block; 7. Universal ball. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 As shown, this utility model is a fixture for polishing end caps, including a mounting block 1. A groove is provided on the lower surface of the mounting block 1. A bidirectional screw 2 is rotatably connected to the inner surface of the groove. A drive motor 3 is installed on one side of the mounting block 1. The output end of the drive motor 3 is installed with the bidirectional screw 2 through a coupling. A through-hole 101 is provided on the outer surface of the mounting block 1. One end of the through-hole 101 extends into the interior of the groove. Two moving structures 4 are provided on the outer surface of the bidirectional screw 2. A pressing cylinder 5 is provided at the lower end of each of the two moving structures 4. A buffer structure 6 is provided at the output end of each of the two pressing cylinders 5. A universal ball 7 is provided at the lower end of each of the two buffer structures 6. The moving structure 4 includes a slider 401. A connecting seat 402 is provided on the lower surface of the slider 401. A pressing cylinder 5 is installed on the lower surface of the connecting seat 402. A lubrication component 403 is provided on the outer surface of the slider 401.

[0027] The slider 401 is slidably connected to the outer surface of the bidirectional screw 2, and one end of the slider 401 is located inside the groove and moves along the axis of the groove.

[0028] The buffer structure 6 uses a triple mechanism of elastic buffering, damping energy dissipation and mechanical limiting to change the contact mode between the universal ball 7 and the end cap from rigid transient impact to gradual flexible loading, which completely solves the stress concentration and damage risk caused by rigid point contact in traditional clamps, while improving stability.

[0029] The buffer structure 6 includes a housing 601, a mounting base 602 on the upper surface of the housing 601, the output end of the pressing cylinder 5 is installed inside the mounting base 602, a first cover plate 603 is installed on the lower surface of the housing 601, a slide rod 604 is slidably connected inside the housing 601, one end of the slide rod 604 passes through the first cover plate 603 and is fitted with a universal ball 7;

[0030] A damping telescopic rod 605 is installed on the inner top of the housing 601. The telescopic end of the damping telescopic rod 605 is fitted onto the upper surface of the slide rod 604. A spring 606 is sleeved on the outer surface of the damping telescopic rod 605. One end of the spring 606 is installed on the inner top of the housing 601, and the other end of the spring 606 is installed on the upper surface of the slide rod 604.

[0031] A limiting groove is provided on the inner surface of the housing 601, and a limiting block 607 is provided on the outer surface of the slide rod 604. The limiting block 607 is slidably connected inside the limiting groove.

[0032] When the universal ball 7 contacts the end cover surface, the slide rod 604 slides upward along the axis of the housing 601 under the reaction force. The slide rod 604 moves upward and continuously compresses the spring 606, gradually compressing it from the free state to the preset stroke limit. The spring 606 absorbs part of the initial impact energy through elastic deformation. The damping telescopic rod 605 connected in parallel with the spring 606 contracts synchronously. The hydraulic oil inside it flows through the throttle hole to generate nonlinear damping force, converting the remaining impact energy into heat energy for dissipation. When the spring 606 is compressed to the limit position, the damping telescopic rod 605 fully contracts to form a rigid stop. At this time, the output end of the pressing cylinder 5 reaches the maximum stroke, and the system enters the constant pressure holding state. At the same time, the cooperation between the limit block 607 and the housing 601 constrains the rotation of the slide rod 604 to ensure that the force direction is perpendicular.

[0033] The lubrication assembly 403 includes a housing 4031, a second cover plate 4032 installed on the upper surface of the housing 4031, the housing 4031 is installed on the outer surface of the slider 401, an oil outlet hole is opened on the outer surface of the housing 4031, a ball bearing 4033 is rotatably connected inside the oil outlet hole, a sponge block 4034 is provided inside the housing 4031, and an oil inlet hole 4035 is opened on the outer surface of the housing 4031.

[0034] Lubricating oil is injected into the housing 4031 through the oil inlet 4035. The lubricating oil in the housing 4031 is absorbed and stored by the sponge block 4034. When the slider 401 moves along the axis of the bidirectional screw 2, the housing 4031 moves with the slider 401. During the movement, the ball bearings 4033 are subjected to the frictional force of the bidirectional screw 2, causing the ball bearings 4033 to rotate. When the ball bearings 4033 rotate, the ball bearings 4033 covered with lubricating oil come into contact with the surface of the bidirectional screw 2, lubricating the surface of the bidirectional screw 2. This allows the lubricating oil to be evenly applied to the surface of the bidirectional screw 2, thereby reducing the frictional resistance between the slider 401 and the bidirectional screw 2, avoiding the slider 401 from getting stuck due to uneven friction, and improving the stability of the slider 401's movement.

[0035] In use, first install mounting block 1 on the lower surface of the frame in the polishing device, aligning the center of mounting block 1 with the placement seat of the polishing device. Then, install the end cap to be polished on the placement seat of the polishing device. Start the drive motor 3, causing its output end to drive the bidirectional screw 2 to rotate via the coupling, thus moving the two sliders 401 along the axis of the slide groove. During the movement of the sliders 401, the downward pressure cylinder 5 is adjusted in position. After the downward pressure cylinder 5 is properly adjusted, turn off the drive motor 3 and then start the downward pressure cylinder 5, causing its output end to push the buffer structure 6 and the universal ball 7 downward. When the universal ball 7 contacts the end cap surface, the slide rod 604 moves upward along the axis of the housing 601 under the reaction force. As the sliding rod 604 moves upward, it continuously compresses the spring 606, gradually compressing it from its free state to the preset stroke limit. The spring 606 absorbs part of the initial impact energy through elastic deformation. The damping telescopic rod 605, which is connected in parallel with the spring 606, contracts synchronously. The hydraulic oil inside the rod flows through the throttle hole to generate nonlinear damping force, converting the remaining impact energy into heat energy for dissipation. When the spring 606 is compressed to the limit position, the damping telescopic rod 605 fully contracts to form a rigid stop. At this time, the output end of the downward cylinder 5 reaches its maximum stroke, and the system enters a constant pressure holding state. At the same time, the cooperation between the limit block 607 and the housing 601 constrains the rotation of the sliding rod 604 to ensure that the force direction is perpendicular. At this time, the universal ball 7 presses against the upper surface of the end cover to squeeze and fix the upper surface of the end cover.

[0036] Before use, lubricating oil is injected into the housing 4031 through the oil inlet 4035. The lubricating oil in the housing 4031 is absorbed and stored by the sponge block 4034. When the slider 401 moves along the axis of the bidirectional screw 2, the housing 4031 moves with the slider 401. During the movement, the ball bearings 4033 are subjected to the frictional force of the bidirectional screw 2, causing the ball bearings 4033 to rotate. When the ball bearings 4033 rotate, the ball bearings 4033 covered with lubricating oil come into contact with the surface of the bidirectional screw 2, lubricating the surface of the bidirectional screw 2. This allows the lubricating oil to be evenly applied to the surface of the bidirectional screw 2, thereby reducing the frictional resistance between the slider 401 and the bidirectional screw 2, avoiding the slider 401 from getting stuck due to uneven friction, and improving the stability of the slider 401's movement.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A fixture for polishing end caps, comprising a mounting block (1), wherein a groove is formed on the lower surface of the mounting block (1), and a bidirectional screw (2) is rotatably connected to the inner surface of the groove; a drive motor (3) is mounted on one side of the mounting block (1), and the output end of the drive motor (3) is mounted to the bidirectional screw (2) via a coupling, characterized in that: The outer surface of the mounting block (1) is provided with a through opening (101), one end of which extends into the interior of the slide groove, and the outer surface of the bidirectional screw (2) is provided with two moving structures (4); Both of the two moving structures (4) are provided with a pressing cylinder (5) at their lower ends, both of the two pressing cylinders (5) are provided with a buffer structure (6) at their output ends, and both of the two buffer structures (6) are provided with a universal ball (7) at their lower ends. The movable structure (4) includes a slider (401), a connecting seat (402) is provided on the lower surface of the slider (401), a pressing cylinder (5) is installed on the lower surface of the connecting seat (402), and a lubrication assembly (403) is provided on the outer surface of the slider (401).

2. The end cap polishing fixture according to claim 1, characterized in that: The slider (401) is slidably connected to the outer surface of the bidirectional screw (2), and one end of the slider (401) is located inside the groove and moves along the axis of the groove.

3. The end cap polishing fixture of claim 1, wherein: The buffer structure (6) includes a housing (601), the upper surface of the housing (601) is provided with a mounting base (602), the output end of the downward pressure cylinder (5) is installed inside the mounting base (602), the lower surface of the housing (601) is provided with a first cover plate (603), and a slide rod (604) is slidably connected inside the housing (601). One end of the slide rod (604) passes through the first cover plate (603) and is fitted with a universal ball (7).

4. The end cap polishing fixture of claim 3, wherein: A damping telescopic rod (605) is installed on the inner top of the housing (601), and the telescopic end of the damping telescopic rod (605) is fitted onto the upper surface of the slide rod (604). A spring (606) is fitted on the outer surface of the damping telescopic rod (605). One end of the spring (606) is installed on the inner top of the housing (601), and the other end of the spring (606) is installed on the upper surface of the slide rod (604).

5. The end cap polishing fixture of claim 4, wherein: The inner surface of the housing (601) is provided with a limiting groove, and the outer surface of the slide rod (604) is provided with a limiting block (607), which is slidably connected inside the limiting groove.

6. The end cap polishing fixture of claim 1, wherein: The lubrication assembly (403) includes a housing (4031), a second cover plate (4032) is installed on the upper surface of the housing (4031), the housing (4031) is installed on the outer surface of the slider (401), an oil outlet hole is opened on the outer surface of the housing (4031), a ball bearing (4033) is rotatably connected inside the oil outlet hole, a sponge block (4034) is provided inside the housing (4031), and an oil inlet hole (4035) is opened on the outer surface of the housing (4031).

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