Precise self-centering clamp mechanism

Abstract

The utility model discloses a precise self-centering clamp mechanism, belongs to the technical field of clamps, and aims to solve the problems that the precision cannot be guaranteed and the height cannot be adjusted in the centering process, the precise self-centering clamp mechanism comprises a mounting plate, a bottom plate and a supporting column, a placing disc is arranged on the upper portion of the mounting plate, and a connecting shaft is fixedly connected to the bottom of the placing disc; a lifting mechanism is arranged at the bottom of the connecting shaft and located on the upper portion of the bottom plate, and a clamping mechanism is arranged on the containing disc and located on the upper portion of the bottom plate. By means of the clamping mechanism, automatic centering work can be rapidly and conveniently conducted on shaft workpieces in the clamping process of the shaft workpieces, the shaft workpieces are made to be located in the center of the containing disc, centering accuracy of the shaft workpieces is improved, follow-up machining work can be conveniently conducted, and by means of the lifting mechanism, machining efficiency is improved. And after the workpiece is automatically centered and clamped in cooperation with the clamping mechanism, the machining height of the workpiece can be adjusted so that machining work at different heights can be conveniently conducted, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, and in particular relates to a precision self-centering clamp mechanism. Background Art

[0002] The self-centering fixture is an efficient and precise fixture device, which is widely used in many fields such as mechanical processing, assembly and inspection. It uses the characteristics of the workpiece itself to automatically position the workpiece at the center under the action of the fixture, thereby ensuring the position accuracy during the processing, assembly or inspection process. In mechanical processing, the self-centering fixture can accurately clamp precision parts such as shafts and gears to ensure processing accuracy.

[0003] A self-centering automobile welding fixture mechanism with patent announcement number CN220739960U in the prior art includes a workbench, and a fixture mechanism is arranged on the top of the workbench; the fixture mechanism includes a motor arranged on the top of the workbench, the output shaft of the motor is transmission-connected with a transmission rod, the outer surface of the transmission rod is fixedly connected with a driving gear, the outer surface of the driving gear is meshed with a passive gear, the middle of the passive gear is fixedly connected with a first threaded rod, the outer surface of the first threaded rod is threadedly connected with a moving frame, the middle of the driving gear is fixedly connected with a second threaded rod, the outer surface of the second threaded rod is threadedly connected with a connecting frame, and the front of the connecting frame is fixedly connected with a fixed rod. The self-centering automobile welding fixture mechanism is provided with a fixture mechanism, and the components can be self-centered frontward, rearward, leftward and rightward through threaded rods, movable frames and fixed blocks, thereby reducing the deviation caused by the impact force of the components during self-centering, thereby improving the self-centering efficiency. However, the following deficiencies still exist in actual use: from a practical point of view, the device cannot automatically and quickly center shaft or tubular parts when processing them, resulting in processing errors due to inaccurate centering when clamping the workpiece, affecting the processing quality. At the same time, the processing height of the parts in the processing clamping process cannot be adjusted, thereby reducing the practicality of the device.

[0004] Therefore, a precise self-centering fixture mechanism is needed to solve the problems in the prior art that the accuracy of the centering process cannot be guaranteed and the height cannot be adjusted. Utility Model Content

[0005] The purpose of the utility model is to provide a precision self-centering clamp mechanism to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precision self-centering fixture mechanism, comprising a mounting plate, a base plate and a support column, the mounting plate being fixedly connected to the upper part of the support column, the base plate being fixedly connected to the bottom of the support column, a placement plate being provided at the upper part of the mounting plate, a connecting shaft being fixedly connected to the bottom of the placement plate, the connecting shaft being slidably mounted on the upper part of the mounting plate through a linear bearing, a lifting mechanism being provided at the bottom of the connecting shaft at the upper part of the base plate, and a clamping mechanism being provided on the placement plate and provided at the upper part of the base plate.

[0007] The clamping mechanism includes a mounting seat, which is fixedly connected to the upper part of the base plate, a motor is fixedly installed on the upper part of the mounting seat, a driving gear is fixedly connected to the top of the motor, a driven gear is meshed with the front side of the driving gear, a fixed shaft is fixedly connected to the top of the driven gear, a sleeve is rotatably installed on the outer side of the fixed shaft and is fixedly connected to the mounting plate, a connecting rod is fixedly connected to the top of the fixed shaft through the sleeve that penetrates the mounting plate, a clamping rod is fixedly connected to the top of one end of the connecting rod away from the fixed shaft, and an adjustment port matching the clamping rod is opened on the placement plate.

[0008] It should be noted in the solution that the bottom end of the connecting shaft passes through the bottom of the mounting plate.

[0009] It is further worth mentioning that three adjustment openings are opened on the placement plate, and the three adjustment openings are arranged at intervals of degrees by rotating around the center of the placement plate, and the adjustment openings are arranged in an arc shape.

[0010] It should be further explained that three clamping rods are arranged through the adjustment port, the three clamping rods are respectively connected to three connecting rods, the three connecting rods are respectively connected to three fixed shafts, the three fixed shafts are respectively rotatably mounted on the mounting plate through bushings and are evenly arranged, and the setting length of the clamping rod is greater than the length of the connecting shaft.

[0011] As a preferred embodiment, the lifting mechanism includes a hydraulic telescopic rod, which is fixedly connected to the upper part of the base plate below the corresponding connecting shaft, and the top of the hydraulic telescopic rod is fixedly connected to a bearing seat, and the bearing seat is connected to the bottom end of the connecting shaft.

[0012] Compared with the prior art, the precision self-centering fixture mechanism provided by the utility model has at least the following beneficial effects:

[0013] (1) Through the provided clamping mechanism, during the clamping process of the shaft workpiece, it can be automatically centered quickly and conveniently, so that it is located at the center of the placement plate, thereby improving its centering accuracy, so as to facilitate subsequent processing work.

[0014] (2) The lifting mechanism is set up to automatically center and clamp the workpiece in cooperation with the clamping mechanism, and its processing height can be adjusted to facilitate processing work at different heights, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0017] Figure 3 This is a schematic diagram of the split structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the partial disassembly structure of the clamping mechanism of the utility model.

[0019] In the figure: 1. mounting plate; 2. bottom plate; 3. support column; 4. placement plate; 401. connecting shaft; 5. clamping mechanism; 501. mounting seat; 502. motor; 503. driving gear; 504. driven gear; 505. fixed shaft; 506. connecting rod; 507. clamping rod; 508. bushing; 509. adjustment port; 6. lifting mechanism; 601. hydraulic telescopic rod; 602. bearing seat. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with embodiments.

[0021] See also Figure 1-4 The utility model provides a precision self-centering fixture mechanism, including a mounting plate 1, a base plate 2 and a support column 3. The mounting plate 1 is fixedly connected to the upper part of the support column 3, the base plate 2 is fixedly connected to the bottom of the support column 3, a placement plate 4 is arranged on the upper part of the mounting plate 1, a connecting shaft 401 is fixedly connected to the bottom of the placement plate 4, the connecting shaft 401 is slidably mounted on the upper part of the mounting plate 1 through a linear bearing, a lifting mechanism 6 is arranged on the bottom of the connecting shaft 401 on the upper part of the base plate 2, and a clamping mechanism 5 is arranged on the placement plate 4 and is arranged on the upper part of the base plate 2.

[0022] Further as Figure 2 , Figure 3 and Figure 4As shown, it is worth specifically explaining that the clamping mechanism 5 includes a mounting seat 501, the mounting seat 501 is fixedly connected to the upper part of the base plate 2, a motor 502 is fixedly installed on the upper part of the mounting seat 501, a driving gear 503 is fixedly connected to the top of the motor 502, a driven gear 504 is meshed with the front side of the driving gear 503, a fixed shaft 505 is fixedly connected to the top of the driven gear 504, a shaft sleeve 508 is rotatably installed on the outer side of the fixed shaft 505 and is fixedly connected to the mounting plate 1, a connecting rod 506 is arranged on the top of the fixed shaft 505 through the shaft sleeve 508 and fixedly connected to the mounting plate 1, a clamping rod 507 is fixedly connected to the top of the connecting rod 506 away from the fixed shaft 505, and the clamping rod 507 corresponds to an adjustment opening 509 matching with it opened on the placement disk 4, the bottom end of the connecting shaft 401 passes through the bottom of the mounting plate 1, three adjustment openings 509 are opened on the placement disk 4, the three adjustment openings 509 are arranged at intervals of 120° rotating around the center of the placement disk 4, the adjustment openings 509 are arranged in an arc shape, three clamping rods 507 are arranged through the adjustment openings 509, the three clamping rods 507 are respectively connected to the three connecting rods 506, the three connecting rods 506 are respectively connected to the three fixed shafts 505, the three fixed shafts 505 are respectively rotatably installed on the mounting plate 1 through the bushings 508 and are evenly arranged, and the length of the clamping rod 507 is set to be greater than the length of the connecting shaft 401.

[0023] When in use, the motor 502 drives the driving gear 503 to rotate, so that the driving gear 503 drives the driven gear 504 to rotate, thereby realizing the rotation of the connecting rod 506. Under the rotation of the connecting rod 506, the clamping rod 507 slides in the adjustment port 509, thereby causing the placement disk 4 to rotate, thereby driving the other two clamping rods 507 to slide in the adjustment port 509 through the other two adjustment ports 509 and rotate in the shaft sleeve 508 through the connecting rod 506 and the fixed shaft 505, thereby realizing the clamping rods 507 moving toward the center of the placement disk 4, thereby performing a centering operation on the workpiece placed on the upper part of the placement disk 4, so that the center of the workpiece is consistent with the center of the placement disk 4, so as to facilitate processing.

[0024] According to the above working process, it can be known that: through the set clamping mechanism 5, during the clamping process of the shaft workpiece, it can be automatically centered quickly and conveniently, so that it is located at the center of the placement plate 4, thereby improving its centering accuracy, so as to facilitate subsequent processing work.

[0025] Further as Figure 2 and Figure 3 As shown, it is worth specifically explaining that the lifting mechanism 6 includes a hydraulic telescopic rod 601, which is fixedly connected to the upper part of the base plate 2 below the corresponding connecting shaft 401, and a bearing seat 602 is fixedly connected to the top of the hydraulic telescopic rod 601, and the bearing seat 602 is connected to the bottom end of the connecting shaft 401.

[0026] When in use, the hydraulic telescopic rod 601 is operated and the connecting shaft 401 is pushed to slide toward the upper part of the mounting plate 1 through the bearing seat 602, and then the workpiece is pushed upward through the placement plate 4, so as to adjust the processing height, thereby improving the practicability of the device.

[0027] This scheme has the following working process: when this device is used, the workpiece to be processed is placed on the upper part of the mounting plate 1, and the driving gear 503 is driven to rotate by the operation of the motor 502, so that the driving gear 503 drives the driven gear 504 to rotate, and the fixed shaft 505 is driven to rotate in the sleeve 508 through the rotation of the driven gear 504, thereby realizing the rotation of the connecting rod 506, and the clamping rod 507 is set in the adjustment port 509, and the clamping rod 507 slides in the adjustment port 509 under the rotation of the connecting rod 506, and then the adjustment port 509 is squeezed by the sliding of the clamping rod 507 to rotate the placement plate 4, because the placement plate 4 is slidably set on the mounting plate 1 through the connecting shaft 401 through the linear bearing, and the bottom end of the connecting shaft 401 By being connected to the bearing seat 602 and being able to rotate, the placement disk 4 is caused to rotate, thereby driving the other two clamping rods 507 to slide in the adjusting ports 509 through the other two adjusting ports 509 and rotating in the shaft sleeve 508 through the connecting rod 506 and the fixed shaft 505, so that the clamping rods 507 move toward the center of the placement disk 4, thereby performing a centering operation on the workpiece placed on the upper part of the placement disk 4, so that the center of the workpiece is consistent with the center of the placement disk 4, so as to facilitate processing. At the same time, through the operation of the hydraulic telescopic rod 601, the connecting shaft 401 is pushed to slide to the upper part of the mounting plate 1 through the bearing seat 602, and then the workpiece is pushed upward through the placement disk 4, so as to adjust the processing height, thereby improving the practicability of the device.

[0028] In summary: through the set clamping mechanism 5, during the process of clamping the shaft workpiece, it is possible to quickly and conveniently perform automatic centering on it, so that it is located in the center of the placement disk 4, thereby improving its centering accuracy, so as to facilitate subsequent processing work; through the set lifting mechanism 6, after the clamping mechanism 5 automatically centers the workpiece, its processing height can be adjusted to facilitate processing work at different heights, thereby improving the practicability of the device.

Claims

1. A precision self-centering fixture mechanism, comprising a mounting plate (1), a base plate (2) and a support column (3), characterized in that: The mounting plate (1) is fixedly connected to the upper part of the support column (3), the base plate (2) is fixedly connected to the bottom of the support column (3), a placement plate (4) is arranged on the upper part of the mounting plate (1), a connecting shaft (401) is fixedly connected to the bottom of the placement plate (4), the connecting shaft (401) is slidably mounted on the upper part of the mounting plate (1) through a linear bearing, a lifting mechanism (6) is arranged at the bottom of the connecting shaft (401) on the upper part of the base plate (2), and a clamping mechanism (5) is arranged on the placement plate (4) and is arranged on the upper part of the base plate (2); The clamping mechanism (5) comprises a mounting seat (501), wherein the mounting seat (501) is fixedly connected to the upper part of the base plate (2), a motor (502) is fixedly installed on the upper part of the mounting seat (501), a driving gear (503) is fixedly connected to the top of the motor (502), a driven gear (504) is meshedly arranged on the front side of the driving gear (503), a fixed shaft (505) is fixedly connected to the top of the driven gear (504), a shaft sleeve (508) is rotatably installed on the outer side of the fixed shaft (505) and is fixedly connected to the mounting plate (1), a connecting rod (506) is arranged on the top of the fixed shaft (505) through the shaft sleeve (508) and is fixedly connected to the mounting plate (1), a clamping rod (507) is fixedly connected to the top of the connecting rod (506) away from the fixed shaft (505), and an adjustment opening (509) matching the clamping rod (507) is opened on the corresponding placement plate (4).

2. The precision self-centering fixture mechanism according to claim 1, characterized in that: The bottom end of the connecting shaft (401) penetrates to the bottom of the mounting plate (1).

3. The precision self-centering fixture mechanism according to claim 1, characterized in that: Three adjusting openings (509) are provided on the placement plate (4). The three adjusting openings (509) are arranged at intervals of (120)° with the placement plate (4) as the center. The adjusting openings (509) are arranged in an arc shape.

4. The precision self-centering fixture mechanism according to claim 1, characterized in that: The clamping rods (507) are provided with three through the adjustment opening (509), the three clamping rods (507) are respectively connected to the three connecting rods (506), the three connecting rods (506) are respectively connected to the three fixed shafts (505), the three fixed shafts (505) are respectively rotatably mounted on the mounting plate (1) through the shaft sleeves (508) and are evenly arranged, and the length of the clamping rods (507) is set to be greater than the length of the connecting shaft (401).

5. The precision self-centering fixture mechanism according to claim 1, characterized in that: The lifting mechanism (6) comprises a hydraulic telescopic rod (601), wherein the hydraulic telescopic rod (601) is fixedly connected to the upper part of the base plate (2) below the corresponding connecting shaft (401), and a bearing seat (602) is fixedly connected to the top of the hydraulic telescopic rod (601), and the bearing seat (602) is connected to the bottom end of the connecting shaft (401).

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