Heavy duty two jaw center holder

Abstract

The utility model relates to machining technical field, concretely relates to a heavy two-claw center rest, and aims at solving the problem of insufficient bearing capacity of three-claw center rest. Its technical scheme main points are: support seat, with the element of waiting and processing resistance; two claw arms and be used for moving claw arm drive part, drive part drive claw arm moves to the required position of clamping element of waiting and processing and fixes claw arm; the inside of claw arm front end rotatoryly connects with gyro wheel, and support seat and gyro wheel bear the gravity of element of waiting and processing together, adopt the composite bearing structure of bottom support and two sides clamping, make support seat and claw arm bear the gravity of element of waiting and processing together, compared with the traditional three-claw suspension clamping mode, disperses workpiece gravity load, reduces the bearing strength of clamping point, reduces the phenomenon that appears slight displacement in the clamping process, is more suitable for the processing of heavy, large size element.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to a heavy-duty two-jaw center support. Background Technology

[0002] The center support serves as an auxiliary device in the turning and grinding processes of shaft parts, ensuring the machining accuracy and stability of the workpiece. It supports and fixes the rotating workpiece to prevent displacement or deformation during machining, thus ensuring the dimensional accuracy and surface quality of the machined parts.

[0003] In practical applications, traditional three-jaw chucks have insufficient load-bearing capacity when the arms are gripping the workpiece. The force points of the three-jaw chuck arms are relatively dispersed, making it difficult to form a stable rigid support when supporting a suspended workpiece. The workpiece's own weight, as well as cutting forces and vibrations during the machining process, can cause slight deformation or positional shifts in the workpiece. This results in the workpiece's machining accuracy deviating from the design requirements, increasing the scrap rate, raising production costs, and potentially accelerating tool wear, reducing tool life, and further affecting machining efficiency and economy.

[0004] Therefore, a new technical solution is proposed to solve the problems existing in the current technology. Utility Model Content

[0005] The purpose of this invention is to provide a heavy-duty two-jaw center frame to solve the problem of insufficient load-bearing capacity of the existing three-jaw center frame.

[0006] The technical solution of this utility model is: a heavy-duty two-jaw center frame, comprising: The support base abuts against the component to be processed; Two claw arms and a drive unit for moving the claw arms, the drive unit driving the claw arms to move to the desired position to hold the element to be processed and then fixing the claw arms.

[0007] Preferably, a roller is rotatably connected to the inner side of the front end of the claw arm, and the support base and the roller jointly bear the weight of the component to be processed.

[0008] Preferably, the movement trajectory of the claw arm is a straight line.

[0009] Preferably, a movable connector is fixedly connected to one end of the claw arm near the support base, the support base has a slide rail for accommodating the movable connector, a fixing member is fixedly connected in the slide rail, the driving member is rotatably connected to the fixing member, and the driving member is drively connected to the movable connector.

[0010] Preferably, the claw arm is slidably connected to the support base, the support base is provided with a plurality of slide rails, and the claw arm is fixedly connected with a plurality of sliding parts that slide in cooperation with the slide rails.

[0011] Preferably, the support base includes a base body and an extension end, the base body and the extension end are fixedly connected, and the base body and the extension end are slidably connected to a claw arm respectively.

[0012] Preferably, the driving component is a screw, and the driving component is connected to the movable connecting component by a thread.

[0013] Preferably, the outer wall of the driving component has a fixing groove, the fixing component has a fixing hole, the fixing component is sleeved on the driving component, the outer diameter of the fixing hole is larger than the diameter of the driving component, and the inner diameter of the fixing hole is equal to the difference between the diameter of the driving component and the depth of the fixing groove.

[0014] Preferably, the side of the claw arm is fixedly connected with a reinforcing rib perpendicular to the rotation direction of the roller.

[0015] Preferably, the support base and the claw arm form a clamping space, and the support base has several channels leading from the clamping space to the outside of the central frame.

[0016] Compared with the prior art, the advantages of this utility model are: (1) The composite load-bearing structure of bottom support and two-sided clamping is adopted, so that the support base and the claw arm jointly bear the weight of the component to be processed. Compared with the traditional three-jaw suspended clamping method, the workpiece gravity load is dispersed, the load-bearing strength of the clamping point is reduced, and the phenomenon of slight displacement during clamping is reduced. It is more suitable for processing heavy and large-sized components. The reinforcing rib improves the structural strength of the claw arm, reduces the bending deformation of the claw arm due to the load, and enhances the torsional rigidity of the claw arm, adapting to the high-intensity load when processing heavy workpieces. The extension end of the support base increases the maximum distance between the two claw arms, which is convenient for accommodating large-sized components.

[0017] (2) The claw arm limits the linear movement of the claw arm through the sliding cooperation of the slide rail and the movable connector, and the slide rail and the sliding component, so as to avoid the deviation and skew during the clamping process and ensure the guiding accuracy. The screw drives the movable connector to move the clamping arm, and the fixed component limits the axial position of the drive component to realize the adjustment and locking of the position of the claw arm, so as to prevent the claw arm from loosening and moving outward due to the processing vibration after clamping, and ensure the stability of the center frame clamping.

[0018] (3) The reinforcing ribs improve the structural strength of the claw arm, reduce the bending deformation of the claw arm due to the load, enhance the torsional rigidity of the claw arm, and adapt to the high-intensity load when processing heavy workpieces. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the heavy-duty two-claw center frame described in this utility model; Figure 2 This is a top view of the heavy-duty two-claw center frame described in this utility model; Figure 3 The present utility model Figure 2 Sectional view of AA; Figure 4 The present utility model Figure 2 A cross-sectional view of BB.

[0020] The components are: 1. Support base; 11. Base body; 12. Extension end; 13. Slide rail; 131. Fixing component; 14. Slide rail; 15. Channel; 2. Claw arm; 21. Roller; 22. Moving connector; 23. Sliding component; 24. Reinforcing rib; 3. Driving component; 31. Fixing groove. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific embodiments: like Figure 1 As shown, a heavy-duty two-jaw center rest includes a support base 1, two jaw arms 2, and a drive unit 3 for moving the jaw arms 2. The support base 1 includes a base body 11 and an extension end 12, which are fixedly connected. The base body 11 and the extension end 12 are slidably connected to one jaw arm 2, respectively. The support base 1 and the jaw arms 2 form a clamping space for placing the workpiece to be processed. The support base 1 abuts against the workpiece to be processed. The support base 1 has several channels 15 leading from the clamping space to the outside of the center rest, which facilitates the flow of cutting fluid and the discharge of iron filings during processing, and avoids the accumulation of waste chips in the clamping space, which may affect the clamping accuracy or even damage the workpiece and / or the center rest. A roller 21 is rotatably connected to the inner side of the front end of the jaw arm 2. The support base 1 and the roller 21 jointly bear the weight of the workpiece to be processed. In at least one embodiment, the side of the jaw arm 2 is fixed. The roller 21 is connected to a reinforcing rib 24 perpendicular to its rotation direction. The movement trajectory of the claw arm 2 is linear. After the driving component 3 drives the claw arm 2 to move to the required position to clamp the component to be processed, the claw arm 2 is fixed. The support base 1 and the claw arm 2 jointly bear the weight of the component to be processed, forming a composite load-bearing structure with bottom support and clamping on both sides. Compared with the traditional three-jaw suspended clamping method, it disperses the gravity load of the workpiece, reduces the load-bearing strength of the clamping point, and reduces the phenomenon of slight displacement during clamping. It is more suitable for processing heavy and large-sized components. The reinforcing rib 24 improves the structural strength of the claw arm 2, reduces the bending deformation of the claw arm 2 due to the load, and enhances the torsional rigidity of the claw arm 2, adapting to the high-intensity load during the processing of heavy workpieces. The extension end 12 of the support base 1 increases the maximum distance between the two claw arms 2, making it easier to accommodate large-sized components.

[0022] like Figures 2-4As shown, the claw arm 2 is slidably connected to the support base 1. The support base 1 has a slide rail 13, and a fixing member 131 is fixedly connected inside the slide rail 13. A movable connecting member 22 is fixedly connected to one end of the claw arm 2 near the support base 1. The driving member 3 is rotatably connected to the fixing member 131, and the driving member 3 is transmissionally connected to the movable connecting member 22. The support base 1 has several slide rails 14, and the claw arm 2 is fixedly connected to several sliding members 23 that slide in cooperation with the slide rails 14. The claw arm 2 moves along a straight trajectory through the cooperation of the slide rails 13 and the movable connecting member 22, and the slide rails 14 and the sliding members 23. Multiple positions are connected to ensure the guiding accuracy of the movement of the claw arm 2, avoid deviation, adapt to heavy workpieces of different diameter ranges, and facilitate adjustment of the clamping range of the claw arm 2.

[0023] like Figures 1-4 As shown, in at least one embodiment, the heavy-duty two-jaw center frame can bear a load of 20 tons. The support base 1 includes an integrally formed base body 11 and an extension end 12. The claw arm 2 is located at the upper end of the support base 1. The support base 1 has two channels 15 leading from the clamping space to the outside of the center frame. A straight slide rail 13 is provided at one end of the support base 1 near the claw arm 2. Rectangular fixing members 131 are welded to the slide rail 13 near the two ends of the claw arm 2. The fixing members 131 have circular fixing holes and are sleeved on the driving member 3. A square connecting groove is provided at one end of the claw arm 2 near the support base 1. A directional movable connecting member 22 is inserted into the connecting groove. The movable connecting member 22 has a connecting hole. The driving member 3 for moving the claw arm 2 is a screw. The driving member 3 and the movable connecting member 22 are connected to the screw through the connecting hole. The self-locking characteristic of the screw drive simplifies the operation of fixing the claw arm 2 after movement. The outer wall of component 3 is provided with an annular fixing groove 31. The diameter of the fixing hole is smaller than the diameter of the driving component 3, and the diameter of the fixing hole is larger than the difference between the diameter of the driving component 3 and the depth of the fixing groove 31. The driving component 3 is connected to the moving connecting component 22 by a screw and a threaded transmission. With the help of the fixing component 131, the driving component 3 is axially limited to achieve adjustment and locking of the position of the claw arm 2. This prevents the claw arm 2 from loosening and moving outward due to processing vibration after clamping, and further ensures the stability of the center frame clamping. The support base 1 is provided with two linear slide rails 14. The cross-sectional shape of the slide rail 14 is convex. Two sliding components 23 that slide in cooperation with the slide rail 14 are installed on both sides of each claw arm 2. The sliding components 23 are bolts. The sliding components 23 connect the support base 1 and the claw arm 2 and restrict and fix the claw arm 2 in the vertical direction, so that the claw arm 2 can only move horizontally along the slide rail 14. This ensures the linear movement of the claw arm 2 while further strengthening the connection strength between the claw arm 2 and the support base 1.

[0024] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A heavy-duty two-jaw center frame, characterized in that, include: The support base (1) abuts against the component to be processed; Two claw arms (2) and a drive unit (3) for moving the claw arms (2), the drive unit (3) driving the claw arms (2) to move to the desired position to hold the element to be processed and then fixing the claw arms (2).

2. The heavy-duty two-jaw center frame according to claim 1, characterized in that: The inner side of the front end of the claw arm (2) is rotatably connected to a roller (21), and the support base (1) and the roller (21) jointly bear the weight of the component to be processed.

3. A heavy-duty two-jaw center frame according to claim 1, characterized in that: The movement trajectory of the claw arm (2) is a straight line.

4. A heavy-duty two-jaw center frame according to claim 1, characterized in that: The claw arm (2) is fixedly connected to a movable connector (22) at one end near the support base (1). The support base (1) has a slide (13) for accommodating the movable connector (22). A fixing member (131) is fixedly connected in the slide (13). The driving member (3) is rotatably connected to the fixing member (131). The driving member (3) is drively connected to the movable connector (22).

5. A heavy-duty two-jaw center frame according to claim 1, characterized in that: The claw arm (2) is slidably connected to the support base (1), the support base (1) is provided with several slide rails (14), and the claw arm (2) is fixedly connected with several sliding parts (23) that slide with the slide rails (14).

6. A heavy-duty two-jaw center frame according to claim 1, characterized in that: The support base (1) includes a base body (11) and an extension end (12), the base body (11) and the extension end (12) are fixedly connected, and the base body (11) and the extension end (12) are slidably connected to a claw arm (2).

7. A heavy-duty two-jaw center frame according to claim 4, characterized in that: The driving component (3) is a screw, and the driving component (3) is connected to the movable connecting component (22) by a thread.

8. A heavy-duty two-jaw center frame according to claim 7, characterized in that: The outer wall of the driving member (3) is provided with a fixing groove (31), and the fixing member (131) is provided with a fixing hole. The fixing member (131) is sleeved on the driving member (3). The outer diameter of the fixing hole is greater than the diameter of the driving member (3), and the inner diameter of the fixing hole is equal to the difference between the diameter of the driving member (3) and the depth of the fixing groove (31).

9. A heavy-duty two-jaw center frame according to claim 2, characterized in that: The side of the claw arm (2) is fixedly connected with a reinforcing rib (24) perpendicular to the rotation direction of the roller (21).

10. A heavy-duty two-jaw center frame according to claim 1, characterized in that: The support base (1) and the claw arm (2) form a clamping space, and the support base (1) has several channels (15) leading from the clamping space to the outside of the central frame.

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