An adaptive stable clamping tool for external grinding

Abstract

The utility model relates to a kind of adaptive steady clamping tool for external grinding, and it relates to machining technical field;Two-way screw rod is rotated and connected in mounting plate by bearing, two ends of two-way screw rod are respectively rotated and connected with the slider of two sides by thread, and the middle end of two-way screw rod is connected with adjusting motor by worm and gear pair, and adjusting motor is embedded and fixed in mounting plate;Rotary disc is respectively rotated and connected and embedded in the fixed plate of two sides by bearing, and one of fixed plate is embedded and fixed with rotary motor;Rotary gear is set and fixed on the output shaft of rotary motor, and rotary gear is meshed with the gear on adjacent rotary disc;Clamping mechanism is respectively arranged on the rotary disc of two sides, and clamping mechanism is connected with fixed plate;Realize workpiece automatic centering clamping and accurate rotation, improve grinding accuracy and clamping efficiency, adapt to different diameter workpiece processing demand.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to an adaptive and stable clamping fixture for external cylindrical grinding. Background Technology

[0002] External cylindrical grinding is a common finishing process in machining, which requires extremely high stability in workpiece clamping and rotational accuracy. Traditional clamping fixtures mostly use fixed chucks or center structures, which have problems such as limited adjustment range and poor adaptability. Especially for cylindrical workpieces of different diameters or requiring precise rotation, frequent fixture changes are often required, which seriously affects machining efficiency. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings and deficiencies of the existing technology by providing a reasonably designed and easy-to-use adaptive and stable clamping fixture for external cylindrical grinding, which can effectively solve the aforementioned defects of the existing technology.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: It includes a mounting plate and a fixing plate. Fixing plates are symmetrically arranged on the left and right sides of the upper surface of the mounting plate, and a slider on the lower surface of the fixing plate is slidably mounted on the mounting plate. It also includes: a bidirectional lead screw, which is screwed into the mounting plate via bearings. Both ends of the bidirectional lead screw are screwed to the sliders on both sides via threads. The middle end of the bidirectional lead screw is connected to an adjusting motor via a worm gear pair. The adjusting motor is embedded and fixed within the mounting plate. Two rotating disks are present, each screwed into the fixing plates on both sides via bearings. A rotating motor is embedded and fixed within one of the fixing plates. A rotating gear is sleeved and fixed on the output shaft of the rotating motor, and the rotating gear meshes with the teeth on the adjacent rotating disk. Two clamping mechanisms are present, each disposed on one of the rotating disks on both sides, and the clamping mechanisms are connected to the fixing plates.

[0005] The above technical solution involves placing a cylindrical workpiece between two clamping mechanisms, then starting an adjusting motor. The adjusting motor drives a bidirectional lead screw to rotate via a worm gear pair. The bidirectional lead screw moves a fixed plate via sliders at both ends, which in turn moves the clamping mechanisms, allowing the clamping mechanisms on both sides to insert into the two ends of the workpiece. The workpiece is then clamped by the clamping mechanisms. During grinding, a rotating motor is started, which drives a rotating disk to rotate via a rotating gear. This allows the workpiece to rotate through the clamping mechanisms, thus meeting the operational requirements.

[0006] As a further improvement of this utility model, a rotating ring is sleeved and fixed on the outer ring wall of the rotating disk, and the rotating ring is movably disposed within the fixed plate; this can increase the stability of the rotating disk when it rotates.

[0007] As a further improvement of this utility model, the clamping mechanism includes: a rotating connecting rod, wherein there are several rotating connecting rods, and they are all screwed onto the outer wall of the rotating disk at equal angles via hinge seats, and driven connecting rods are screwed onto both sides of the other end of the rotating connecting rods via shafts; a fixed disk, wherein the fixed disk is suspended on the upper side of the mounting plate, and the other ends of two adjacent driven connecting rods are screwed onto the fixed disk via hinge seats; a clamping arc plate, wherein there are several clamping arc plates, and the protrusions on their inner arc surfaces are inserted into the corresponding rotating connecting rods one by one, and the protrusions are sleeved and fixed on the shafts connecting the rotating connecting rods and the driven connecting rods; and a driving mechanism, wherein the driving mechanism is disposed in the fixed plate and is connected to the fixed disk;

[0008] With the above technical solution, the drive mechanism is activated, which drives the fixed plate to move. During the movement of the fixed plate, the driven connecting rod and the rotating connecting rod rotate. When the driven connecting rod and the rotating connecting rod rotate, the clamping arc plate moves outward until the clamping arc plate abuts against the inner ring wall of the workpiece.

[0009] As a further improvement of this utility model, the driving mechanism includes: a driving screw, one end of which is screwed into the fixed disk via a bearing, and the other end of which is sequentially inserted into the rotating disk and the fixed plate; a limiting strip, which consists of several limiting strips and is equally angled on one side of the inner ring wall of the fixed plate, and the limiting strips are movably inserted into the strip groove on the driving screw; and an internal threaded ring, which is threaded onto one end of the driving screw located in the fixed plate, and one side of the internal threaded ring is connected to a driving motor via a gear pair, the driving motor being embedded and fixed in the fixed plate.

[0010] With the above technical solution, the drive motor is started, and the drive motor drives the internal threaded ring to rotate through the gear pair. During the rotation, the internal threaded ring can drive the drive screw to move under the limit of the limit strip, and the drive screw drives the fixed plate to move.

[0011] As a further improvement of this utility model, an anti-slip pad is fixed on the outer wall of the arc-shaped clamp, and the two sides of the anti-slip pad are arranged on the same plane as the two sides of the arc-shaped clamp.

[0012] The above technical solution can increase the friction between the arc-shaped clamp and the inner ring wall of the workpiece.

[0013] As a further improvement of this utility model, a bellows cover is provided in the sliding groove on both sides of the upper surface of the mounting plate, and the two sides of the bellows cover are respectively fixed to the slider and the inner wall of one side of the sliding groove.

[0014] The above technical solution can shield the chute, preventing debris from entering and causing it to malfunction.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The adaptive and stable clamping fixture for external cylindrical grinding described in this utility model realizes automatic centering and clamping of the workpiece and precise rotation, improves grinding accuracy and clamping efficiency, and adapts to the processing needs of workpieces with different diameters. This utility model has the advantages of reasonable design and low manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is an exploded view of the structure of this utility model.

[0018] Figure 3 This is an exploded view of the structure of the fixing plate and clamping mechanism in this utility model.

[0019] Figure 4 for Figure 3 Enlarged view of section A.

[0020] Explanation of reference numerals in the attached drawings: Mounting plate 1, Fixing plate 2, Bidirectional lead screw 3, Adjusting motor 4, Rotating disk 5, Rotating motor 6, Rotating gear 7, Clamping mechanism 8, Rotating connecting rod 8-1, Driven connecting rod 8-2, Fixing disk 8-3, Clamping arc plate 8-4, Drive mechanism 8-5, Drive screw 8-5-1, Limiting strip 8-5-2, Internal threaded ring 8-5-3, Drive motor 8-5-4, Rotating ring 9, Anti-slip pad 10, Bellows cover 11. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example 1

[0022] like Figures 1-4 As shown, this embodiment includes a mounting plate 1 and a fixing plate 2. Fixing plates 2 are symmetrically arranged on the left and right sides of the upper surface of the mounting plate 1. A slider on the lower surface of the fixing plate 2 is slidably mounted on the mounting plate 1. Bellows covers 11 are provided in the grooves on both sides of the upper surface of the mounting plate 1. The bellows covers 11 are fixed to the inner wall of the slider and one side of the groove, respectively, to shield the grooves and prevent debris from entering and causing malfunction. It also includes:

[0023] The bidirectional lead screw 3 is screwed into the mounting plate 1 via bearings. Both ends of the bidirectional lead screw 3 are screwed into the sliders on both sides via threads. The middle end of the bidirectional lead screw 3 is connected to the adjusting motor 4 via a worm gear pair. The adjusting motor 4 is embedded and fixed in the mounting plate 1.

[0024] Two rotating disks 5 are provided, and they are respectively screwed into the fixed plates 2 on both sides by bearings. A rotating motor 6 is embedded in the fixed plate 2 on the left side and fixed with bolts. A rotating ring 9 is sleeved and welded to the outer ring wall of the rotating disk 5. The rotating ring 9 is movably set in the fixed plate 2; this can increase the stability of the rotating disk 5 when it rotates.

[0025] Rotating gear 7 is sleeved and fixed on the output shaft of rotating motor 6, and the rotating gear 7 is meshed with the teeth on the adjacent rotating disk 5;

[0026] Clamping mechanism 8, there are two clamping mechanisms 8, which are respectively set on the rotating disks 5 on both sides, and the clamping mechanism 8 is connected to the fixed plate 2. Example 2

[0027] See Figure 1-3 As shown, based on Embodiment 1, the clamping mechanism 8 includes:

[0028] Rotating connecting rod 8-1, there are several rotating connecting rods 8-1, and they are all screwed to the outer wall of the rotating disk 5 at equal angles through hinge seats. Both sides of the other end of the rotating connecting rod 8-1 are screwed to driven connecting rods 8-2 through shafts.

[0029] The fixed plate 8-3 is suspended on the upper side of the mounting plate 1, and the other ends of the two adjacent driven connecting rods 8-2 are screwed onto the fixed plate 8-3 through hinge seats;

[0030] Clamping arc plates 8-4, there are several clamping arc plates 8-4, and the protrusions on the inner arc surface of each are inserted into the corresponding rotating connecting rods 8-1, and the protrusions are sleeved and fixed on the shaft connecting the rotating connecting rods 8-1 and the driven connecting rods 8-2; anti-slip pads 10 are glued and fixed on the outer wall of the clamping arc plates 8-4, and the two sides of the anti-slip pads 10 are arranged in the same plane as the two sides of the clamping arc plates 8-4, which can increase the friction between the clamping arc plates 8-4 and the inner ring wall of the workpiece;

[0031] The drive mechanism 8-5 is disposed inside the fixed plate 2 and is connected to the fixed disk 8-3. Example 3

[0032] See Figure 1-4 As shown, based on Embodiment 2, the driving mechanism 8-5 includes:

[0033] The drive screw 8-5-1 has one end screwed into the fixed disk 8-3 via a bearing, and the other end of the drive screw 8-5-1 is inserted into the rotating disk 5 and the fixed plate 2 in sequence.

[0034] Limiting strip 8-5-2, there are several limiting strips 8-5-2, and they are set at equal angles on one side of the inner ring wall of the fixing plate 2. The limiting strip 8-5-2 is movably inserted into the strip groove on the driving screw 8-5-1;

[0035] The internal threaded ring 8-5-3 is threaded onto one end of the drive screw 8-5-1 located inside the fixed plate 2. One side of the internal threaded ring 8-5-3 is connected to the drive motor 8-5-4 through a gear pair. The drive motor 8-5-4 is embedded and fixed inside the fixed plate 2.

[0036] When using this invention, the cylindrical workpiece is placed between the two clamping mechanisms 8. Then, the adjusting motor 4 is started. The adjusting motor 4 drives the bidirectional lead screw 3 to rotate through the worm gear pair. The bidirectional lead screw 3 drives the fixed plate 2 to move through the sliders at both ends. The fixed plate 2 drives the clamping mechanism 8 to move, so that the clamping mechanisms 8 on both sides are inserted into the two ends of the workpiece respectively. Then, the drive motor 8-5-4 is started. The drive motor 8-5-4 drives the internal threaded ring 8-5-3 to rotate through the gear pair. During the rotation, the internal threaded ring 8-5-3 is positioned on the limit bar 8-5-2. When the limit is reached, the drive screw 8-5-1 can be moved, and the drive screw 8-5-1 drives the fixed plate 8-3 to move. During the movement of the fixed plate 8-3, the driven connecting rod 8-2 and the rotating connecting rod 8-1 rotate. When the driven connecting rod 8-2 and the rotating connecting rod 8-1 rotate, the clamping arc plate 8-4 moves outward until the clamping arc plate 8-4 abuts against the inner ring wall of the workpiece. When the grinding operation is performed, the rotating motor 6 is started. The rotating motor 6 drives the rotating plate 5 to rotate through the rotating gear 7, so that the workpiece can be rotated through the clamping mechanism 8 to meet the operation requirements.

[0037] Compared with the prior art, the beneficial effects of this specific embodiment are as follows:

[0038] 1. Through the cooperation of the bidirectional lead screw 3 and the worm gear pair, the adjusting motor 4 can accurately control the synchronous movement of the two fixed plates 2, so that the clamping mechanism 8 can quickly adapt to cylindrical workpieces of different lengths.

[0039] 2. The clamping mechanism 8 adopts a multi-link linkage structure. The drive motor 8-5-4 drives the drive screw 8-5-1 through the gear pair, which pushes the fixed plate 8-3 to make the clamping arc plate 8-4 expand or contract radially and automatically fit the inner wall of the workpiece.

[0040] 3. The drive mechanism 8-5 and the clamping assembly adopt a separate layout, which is convenient for disassembly and assembly, and facilitates the replacement of the clamping arc plate 8-4 for different workpiece sizes, thereby reducing maintenance costs.

[0041] 4. The worm gear pair has a self-locking characteristic, and can still maintain the clamping force after power failure, which is highly safe. At the same time, the rotating motor 6 is directly driven by gears, which has a rapid response and is suitable for high-frequency forward and reverse rotation processing needs.

[0042] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adaptive and stable clamping fixture for external cylindrical grinding, comprising a mounting plate (1) and a fixing plate (2), wherein the fixing plates (2) are symmetrically arranged on the left and right sides of the upper surface of the mounting plate (1), and a slider on the lower surface of the fixing plate (2) is slidably disposed on the mounting plate (1); characterized in that: It also includes: The bidirectional lead screw (3) is screwed into the mounting plate (1) by bearings. The two ends of the bidirectional lead screw (3) are screwed into the sliders on both sides by threads. The middle end of the bidirectional lead screw (3) is connected to the adjusting motor (4) by a worm gear pair. The adjusting motor (4) is embedded and fixed in the mounting plate (1). Rotating disk (5), there are two rotating disks (5), and they are respectively screwed into the fixing plates (2) on both sides by bearings. A rotating motor (6) is embedded and fixed in one of the fixing plates (2). Rotating gear (7), the rotating gear (7) is sleeved and fixed on the output shaft of the rotating motor (6), and the rotating gear (7) is meshed with the teeth on the adjacent rotating disk (5); Clamping mechanism (8), there are two clamping mechanisms (8), which are respectively disposed on the rotating disks (5) on both sides, and the clamping mechanism (8) is connected to the fixed plate (2); the clamping mechanism (8) includes: Rotating connecting rod (8-1), there are several rotating connecting rods (8-1), and they are all screwed to the outer wall of the rotating disk (5) at equal angles through hinge seats. Both sides of the other end of the rotating connecting rod (8-1) are screwed to driven connecting rods (8-2) through shafts. The fixed plate (8-3) is suspended on the upper side of the mounting plate (1), and the other ends of the two adjacent driven connecting rods (8-2) are screwed onto the fixed plate (8-3) through hinge seats; Clamping arc plate (8-4), there are several clamping arc plates (8-4), and the protrusions on their inner arc surfaces are inserted into the corresponding rotating connecting rods (8-1) one by one, and the protrusions are sleeved and fixed on the shaft connecting the rotating connecting rod (8-1) and the driven connecting rod (8-2); A drive mechanism (8-5) is disposed within a fixed plate (2) and connected to a fixed disk (8-3); the drive mechanism (8-5) comprises: The drive screw (8-5-1) has one end screwed into the fixed disk (8-3) by a bearing, and the other end of the drive screw (8-5-1) is inserted into the rotating disk (5) and the fixed plate (2) in sequence. Limiting strip (8-5-2), there are several limiting strips (8-5-2), and they are set at equal angles on one side of the inner ring wall of the fixing plate (2). The limiting strip (8-5-2) is movably inserted into the strip groove on the driving screw (8-5-1); The internal threaded ring (8-5-3) is threaded onto one end of the drive screw (8-5-1) located inside the fixed plate (2). One side of the internal threaded ring (8-5-3) is connected to the drive motor (8-5-4) through a gear pair. The drive motor (8-5-4) is embedded and fixed inside the fixed plate (2).

2. The adaptive stabilizing clamping fixture for external cylindrical grinding according to claim 1, characterized in that: A rotating ring (9) is fitted and fixed on the outer ring wall of the rotating disk (5), and the rotating ring (9) is movably disposed inside the fixed plate (2).

3. The adaptive stabilizing clamping fixture for external cylindrical grinding according to claim 1, characterized in that: An anti-slip pad (10) is fixed on the outer wall of the clamping arc plate (8-4), and the two sides of the anti-slip pad (10) are arranged on the same plane as the two sides of the clamping arc plate (8-4).

4. The adaptive stabilizing clamping fixture for external cylindrical grinding according to claim 1, characterized in that: The mounting plate (1) has a bellows cover (11) installed in the grooves on both sides of the upper surface. The bellows cover (11) is fixed on the slider and the inner wall of one side of the groove, respectively.

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