Center frame for slant bed lathe

Abstract

The utility model relates to the technical field of inclined bed center frames, in particular to a center frame for an inclined bed lathe, which comprises a C-shaped seat, a rotating gear, a clamping arm and an adjusting component. The locking piece is arranged at the side part of the C-shaped seat and is used for locking the position of the sliding rail; the driving rack is connected to the sliding rail in a sliding mode in the axial direction, and the driving rack is meshed with the rotating gear; the fine adjustment screw rod is rotationally connected to the sliding rail and is in threaded fit with the driving rack, the driving rack is driven to move through rotation, then the rotating gear is driven to rotate, and the function of fine adjustment of the clamping arm is achieved; according to the utility model, the sliding rail is matched with the multi-stage clamping groove of the locking piece, so that an operator only needs to lift and pull the locking piece to realize large-range coarse adjustment of the clamping arm, and the production changing time of workpieces with larger diameter difference is obviously shortened. And compared with a traditional adjusting mode of screwing bolts step by step, the effect of improving the adjusting efficiency is achieved.

Description

Technical Field

[0001] This utility model relates to the field of slant bed center support technology, and in particular to a center support for a slant bed lathe. Background Technology

[0002] The slant bed lathe is a high-precision, high-efficiency automated machine tool. Equipped with a multi-station turret or power turret, it possesses a wide range of machining capabilities, capable of processing straight cylinders, slanted cylinders, arcs, and various complex workpieces such as threads, grooves, and worm gears. If the workpiece has a large length-to-diameter ratio and low rigidity, a center rest is required for support. This reduces the degree of bending deformation of the workpiece under external forces during machining, thereby minimizing the impact on the machining accuracy.

[0003] Existing Chinese patent application CN104668976A discloses a lathe center rest, including a C-shaped seat (lower seat, upper seat, and pivoting device) and three support devices arranged circumferentially therearound. However, when used on a slant bed CNC lathe, the adjusting bolt of the bottom support device is located below the lower seat, making adjustment inconvenient. Furthermore, the adjustment efficiency is low because the movement of the support device is only driven by the rotation of the adjusting bolt, making it difficult to adapt to the needs of rapid production changeover (two workpieces with significantly different diameters).

[0004] To address this issue, existing Chinese patent application CN111958269B discloses a slant bed center rest, including a base body, a clamping jaw hinged to the base body, and an adjustment assembly for adjusting the rotation of the clamping jaw. The adjustment assembly is located on the side of the base body. The adjustment assembly is threadedly engaged with a hollow rack via a rotating shaft. The hollow rack meshes with a rotating gear located at the inner end of the clamping jaw, thereby rotating the rotating shaft to drive the hollow rack axially, which in turn drives the rotating gear and the clamping jaw to rotate, achieving the effect of the clamping jaw supporting the workpiece. This center rest solves the problem of inconvenient adjustment by placing the adjustment assembly on the side of the base body, but it does not solve the shortcomings of low adjustment efficiency and difficulty in adapting to the needs of rapid production changeover (two workpieces with large diameter differences).

[0005] To address this, we designed a center rest for a slant bed lathe. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model discloses a center rest for a slant bed lathe.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A center rest for a slant bed lathe includes a C-shaped seat and a clamping arm with a rotating gear at its inner end. The C-shaped seat also has an adjustment assembly on its side for driving the rotating gear to rotate and thus rotating the clamping arm. The adjustment assembly comprises:

[0009] The sliding rail is horizontally slidably connected to the C-shaped seat;

[0010] A locking element is provided on the side of the C-shaped seat to lock the position of the sliding rail;

[0011] A drive rack is slidably connected to the sliding rail along the axial direction, and the drive rack meshes with a rotating gear;

[0012] The fine-tuning screw is rotatably connected to the sliding rail and threadedly engaged with the drive rack. By rotating, it drives the drive rack to move, which in turn drives the rotating gear to rotate, thus realizing the function of fine-tuning the clamping arm.

[0013] Furthermore, the sliding rail includes:

[0014] The sliding section is horizontally slidably connected to the C-shaped seat;

[0015] The slide rail section has a groove that engages with the drive rack.

[0016] Furthermore, the slide groove cavity is slidably fitted with a slider, and the drive rack is mounted on the top of the slider;

[0017] The slider has a through threaded hole for engaging the fine-tuning screw.

[0018] Furthermore, the top surface of the sliding section is uniformly provided with a plurality of slots that cooperate with the locking element along its axial direction.

[0019] Furthermore, the locking element includes:

[0020] A fixed seat is located on the side of the C-shaped seat above the sliding section;

[0021] The locking pin is a vertically sliding connection to the fixed base, used to engage with the slot to lock the position of the sliding rail.

[0022] Furthermore, the top of the locking pin is provided with a lifting shaft, the upper end of which slides through the top surface of the fixing seat.

[0023] Furthermore, the lifting shaft is equipped with a spring for pressing the locking pin downwards.

[0024] Furthermore, the locking pins are spaced in two places to engage with two adjacent locking slots.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] 1. Through the multi-stage slot cooperation between the sliding rail and the locking component, the operator only needs to lift the locking component to achieve a wide range of coarse adjustments to the clamping arm, significantly shortening the changeover time for workpieces with large diameter differences. Compared with the traditional adjustment method of tightening bolts step by step, this method achieves improved adjustment efficiency, especially suitable for scenarios with frequent model changes in mass production. At the same time, the threaded engagement design of the fine-tuning screw and the drive rack enables precise displacement control of the clamping arm without introducing new defects compared to existing technologies.

[0027] 2. The spring-loaded locking pin structure of the locking component smoothly engages with the adjacent slot after the lifting shaft is released, while the double-pin design further enhances the locking stability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the rotating gear, sliding rail, locking component, drive rack, and fine-tuning screw in this utility model.

[0030] Figure 3 for Figure 2 A structural diagram in another state;

[0031] Figure 4 This is a schematic diagram of the locking component in this utility model;

[0032] Figure 5 This is a cross-sectional view of the sliding rail, drive rack, and fine-tuning screw in this utility model.

[0033] In the diagram: 1. C-shaped seat; 2. Clamping arm; 3. Rotating gear; 4. Sliding slide rail; 41. Sliding section; 411. Slot; 42. Slide rail section; 43. Slider; 5. Locking element; 51. Fixed seat; 52. Locking pin; 53. Lifting shaft; 54. Spring; 6. Drive rack; 7. Fine-tuning screw. Detailed Implementation

[0034] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0035] Example 1, in conjunction with Appendix Figure 1-3 A center rest for a slant bed lathe, comprising:

[0036] The C-type seat 1, as the main support structure, is preferably made of high-strength cast iron. The open design facilitates the loading and unloading of workpieces and is equipped with a slide rail mounting groove. It should be noted that the C-type seat 1 is existing technology, and its specific structure can be found in relevant literature. It will not be described in detail here.

[0037] The clamping arm 2 has a rotating gear 3 at its inner end, which is rotatably connected to the C-shaped seat 1 via the rotating gear 3; specifically, the clamping arm 2 and

[0038] Adjustment component, which has:

[0039] The sliding rail 4 is horizontally slidably connected to the C-shaped seat 1;

[0040] Furthermore, the sliding rail 4 has a sliding section 41 that is horizontally slidably connected to the C-shaped seat 1 and a rail section 42 that cooperates with the drive rack 6, wherein the rail section 42 has a groove.

[0041] Furthermore, a slider 43 is slidably fitted into the groove cavity, and the top of the slider 43 has a mounting part for mounting the drive rack 6. The drive rack 6 is mounted to the mounting part by bolts or other connecting parts; wherein the drive rack 6 meshes with the rotating gear 3.

[0042] When the slider 43 is provided, the slider 43 is provided with a through threaded hole, which cooperates with the fine-tuning screw 7. That is, by rotating the fine-tuning screw 7, the slider 43 is made to move slowly.

[0043] Locking element 5 is located on the side of C-type seat 1 and is used to lock the position of sliding rail 4.

[0044] Furthermore, the fine-tuning screw 7 is rotatably connected to the sliding rail 4 via bearings and other rotating components. By rotating, it drives the drive rack 6 to move, which in turn drives the rotating gear 3 to rotate, thus realizing the function of fine-tuning the clamping arm 2.

[0045] In one possible implementation, the locking element 5 includes:

[0046] The fixed seat 51 is located on the side of the C-shaped seat 1 above the sliding section 41;

[0047] The locking pin 52 is vertically slidably connected to the fixed base 51;

[0048] In this embodiment, the top surface of the sliding section 41 is uniformly provided with a plurality of slots 411 along its axial direction, and the position of the sliding rail 4 is locked by engaging the slots 411 with the locking pin 52.

[0049] Furthermore, the top of the locking pin 52 is provided with a lifting shaft 53, the upper end of which slides through the top surface of the fixing seat 51. The shaft of the lifting shaft 53 is provided with a spring 54 for pressing the locking pin 52 downward.

[0050] As needed, two locking pins 52 are provided at intervals to engage with two adjacent locking slots 411.

[0051] The specific assembly process includes the following steps:

[0052] Install C-type seat 1: Fix C-type seat 1 with clamping arm 2 to the predetermined position of the slant bed guide rail with M12 bolts, and use a level to calibrate to ensure that the coaxiality error between the center line of the opening and the lathe spindle is ≤0.02mm.

[0053] Install the drive rack 6 and the fine-tuning screw 7: Fix the drive rack 6 to the top of the slider 43 with countersunk screws, ensuring that the center line of the drive rack 6 is parallel to the sliding rail 4; pass the fine-tuning screw 7 through the threaded hole of the slider 43, and connect the end of the screw to the end of the sliding rail 4 through an angular contact ball bearing.

[0054] Assemble the sliding rail 4: Insert the linear guide rail of the sliding section 41 into the mounting groove on the side of the C-shaped seat 1, and make the drive rack 6 mesh with the rotating gear 3.

[0055] Configure locking component 5: Attach the fixing seat 51 to the side wall of the C-type seat 1 by bolts or welding, ensuring that the axis of the locking pin 52 is aligned with the locking groove 411; install the spring 54 on the lifting shaft 53, and adjust the spring compression so that the clamping force of the locking pin 52 is 30N.

[0056] During the coarse adjustment stage, when a significant adjustment of the clamping arm 2 is required: 1. Pull up the lifting shaft 53 of the locking component 5 to release the locking pin 52 from the sliding rail 4; 2. Horizontally push or pull the rail along the sliding section 41, driving the rack 6 to rotate the rotating gear 3, causing the clamping arm 2 to close or open to a position slightly larger than the workpiece diameter; release the lifting shaft 53, and the locking pin 52 will automatically engage with the nearest slot 411 under the action of the spring 54, fixing the position of the rail. It should be noted that when the spring 54 is not designed, the locking pin 52 can also automatically engage with the nearest slot 411 under the action of gravity.

[0057] It should be noted that this stage can effectively improve the production changeover efficiency for two workpieces with significantly different diameters, achieving a rapid production changeover effect.

[0058] During the fine-tuning stage, when precise control of the clamping arm 2 is required: 1. Use the handle on the fine-tuning screw 7 or a wrench to rotate the fine-tuning screw 7, thereby driving the slider 43 to move along the slide rail section 42; 2. After the clamping arm 2 contacts the workpiece surface, continue fine-tuning until the preset value is reached.

[0059] The parts of this utility model not described in detail are prior art. 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 this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A center rest for a slant bed lathe, comprising a C-shaped seat (1) and a clamping arm (2) with a rotating gear (3) at its inner end, wherein the side of the C-shaped seat (1) is further provided with an adjustment assembly for driving the rotating gear (3) to rotate and realizing the rotation of the clamping arm (2), characterized in that: The adjusting assembly comprises: a sliding slide rail (4) horizontally slidingly connected to the C-shaped seat (1); a locking piece (5) arranged at the side of the C-shaped seat (1) and used for locking the position of the sliding slide rail (4); a driving rack (6) axially slidingly connected to the sliding slide rail (4), the driving rack (6) being engaged with the rotating gear (3); a fine adjustment screw rod (7) rotationally connected to the sliding slide rail (4) and threadedly matched with the driving rack (6), the fine adjustment screw rod (7) being used for moving the driving rack (6) by rotation, and further moving the rotating gear (3) to realize the function of fine adjustment of the clamping arm (2).

2. A headstock for a slant bed lathe according to claim 1, characterized in that: The sliding slide rail (4) comprises: a sliding section (41) horizontally slidingly connected to the C-shaped seat (1); a slide rail section (42) having a sliding groove matched with the driving rack (6).

3. A headstock for a slant bed lathe according to claim 2, characterized in that: The sliding groove is slidingly matched with a sliding block (43), the driving rack (6) being arranged on the top of the sliding block (43); the sliding block (43) being provided with a threaded hole penetrating therethrough and used for matching the fine adjustment screw rod (7).

4. A headstock for a slant bed lathe according to claim 2, characterized in that: The top surface of the sliding section (41) is uniformly provided with a plurality of clamping grooves (411) matched with the locking piece (5) along the axial direction thereof.

5. A headstock for a slant bed lathe according to claim 4, characterized in that: The locking piece (5) comprises: a fixing seat (51) arranged at the side of the C-shaped seat (1) and located above the sliding section (41); a clamping pin (52) vertically slidingly connected to the fixing seat (51) and used for clamping the clamping groove (411) to lock the position of the sliding slide rail (4).

6. A headstock for a slant bed lathe according to claim 5, characterized in that: The top of the clamping pin (52) is provided with a pulling shaft (53), the upper end of the pulling shaft (53) slidingly penetrating the top surface of the fixing seat (51).

7. A headstock for a slant bed lathe according to claim 6, characterized in that: The shaft body of the pulling shaft (53) is provided with a spring (54) used for downwardly pressing the clamping pin (52).

8. A headstock for a slant bed lathe according to claim 5, characterized in that: The clamping pin (52) is arranged in two, and is used for clamping the adjacent two clamping grooves (411).

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