CN201792230U - Fixture for draw bar - Google Patents

Abstract

The utility model provides a draw rod clamp, which comprises: a base plate; two cylindrical supports arranged on the base plate, and the two inner holes of the two cylindrical supports and the two inner holes of the end of the draw rod The holes are in one-to-one correspondence; the detachable first pressing structure is installed on the bottom plate and is located between the two cylindrical supports, and forms a clamping space for clamping the drawbar shaft with the two cylindrical supports; And, the center-of-circle clamping structure detachably connected with the bottom plate is arranged at the center of each cylindrical support. According to the drawing rod clamp of the utility model, various clamping requirements in the processing of the drawing rod can be met, and the alignment is convenient and fast, the processing efficiency of the drawing rod is greatly improved, and the manufacturing cost is reduced.

Description

Drawbar Clamp

technical field

The utility model relates to the field of mechanical processing, in particular to a draw bar clamp. the

Background technique

With the continuous development and progress of the social economy, the number of electric locomotives is increasingly required. As an important part of the traction device of the electric locomotive, the drawbar of the locomotive plays a role in connecting the car body and the bogie. The shape of the drawbar 9 can be found in As shown in FIG. 5 , it includes two ends 90 and a shaft 92 connecting the two ends, wherein each end is provided with an inner hole 91 . the

The drawbars of the prior art are generally formed by sheet metal at first, and then the upper and lower end surfaces of each end of the drawbar need to be milled, the shape of the entire drawbar should be milled, and the inner holes of the ends should be bored and chamfered. The traditional drawing rod processing technology is scribing-milling the upper and lower planes-scribing-boring and chamfering-milling the shape. In this processing project, multiple machine tools with different processing functions need to be invested, and multiple clamping is required Alignment, low processing efficiency, time-consuming and labor-intensive. As CNC machine tools are widely used in mechanical processing workshops, using CNC machine tools to process the drawbar can effectively reduce the conversion time between different machine tools for the drawbar, but there is no suitable method for CNC machine tools in the prior art. As for the drawbar clamp, the clamping of the drawbar is complicated, and the clamping speed is still slow, which affects the processing efficiency of the drawbar and makes the manufacturing cost of the drawbar relatively high. the

Utility model content

The utility model aims at providing a clamp for the drawbar, which makes the clamping of the drawbar convenient and saves the clamping time of the drawbar. the

According to one aspect of the present invention, a drawbar clamp is provided, comprising: a bottom plate; two cylindrical supports arranged on the bottom plate, and the two inner holes of the two cylindrical supports are connected with the end of the drawbar The two inner holes of the head correspond one by one; the detachable first pressing structure is installed on the bottom plate and is located between the two cylindrical supports, and forms a clamping drawbar shaft with the two cylindrical supports clamping space; and, the center clamping structure detachably connected with the bottom plate is arranged at the center of each cylindrical support. the

Further, the first pressing structure includes: a concave first base frame, fixed on the bottom plate; two first pressing plates, respectively lapped on the opening ends of the first base frame, and the pressing of the two first pressing plates The ends are arranged opposite to each other; the first connecting bolts and the first compression nuts corresponding to each first pressure plate, wherein, the bolt head of the first connecting bolt is T-shaped, and the T-shaped bottom of the first base frame is clamped. In the positioning groove, its threaded end passes through the through hole on the first pressing plate and is screwed with the first compression nut. the

Further, the clamping structure of the center of the circle includes: a threaded rod with threaded sections at both ends, one end of which is screwed to the bottom plate; a central radial-shaped central pressing arm, which is sleeved on the threaded rod, and forms a suitable shape with the cylindrical support. Clamping space for clamping the end of the drawbar; lock nut, screwed on the other end of the threaded rod. the

Further, a detachable second pressing structure is provided on the outer side of each cylindrical support member, and the second pressing structure includes: a bent second base frame, the first bent part of which is fixed on the bottom plate The second pressing plate is lapped on the second bending part of the second pedestal, and its pressing end has a structure suitable for clamping the outer edge of the end of the drawbar; the second connecting bolt has a T-shaped bolt head and is clamped It is connected to the T-shaped positioning groove of the first bending part of the second base frame, and its threaded end passes through the through hole on the second pressing plate and is screwed with the second compression nut. the

Further, a second pressing structure is provided on the outer side of each cylindrical support, and the two second pressing structures are both arranged on the line connecting the centers of the two cylindrical supports. the

Further, the extension direction of the concave bottom of the first base frame is perpendicular to the line connecting the centers of the two cylindrical supports; the concave bottom of the first base frame is also provided with a height adjustable support structure. the

Further, the support structure is a support bolt, which is screwed to the concave bottom of the first base frame. the

Further, each cylindrical support member is provided with chip removal holes. the

Further, the diameters of the inner holes of the two cylindrical supports are larger than the inner diameters of the ends of the drawbar. the

Further, the bottom plate is provided with a positioning structure matched with the workbench of the numerical control machine tool, and lifting threaded holes for lifting. the

According to the technical solution of the utility model, because the bottom plate is used; two cylindrical supports corresponding to the two inner holes of the end of the drawbar are arranged on the bottom plate; The clamping structure is used to clamp the shaft of the drawbar; and the center clamping structure detachably connected with the bottom plate is arranged at the center of each cylindrical support. When the drawbar is processed, by installing or Removing the first pressing structure or the center clamping mechanism can realize the clamping requirements of different processing techniques of the drawbar, simplify the clamping process of the drawbar, effectively improve the clamping efficiency of the drawbar, and shorten the processing time of the drawbar. process, the effect of reducing the manufacturing cost of the drawbar. the

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 schematically shows the structure of the first use state of the drawbar clamp of the present utility model;

Fig. 2 schematically shows the structure of the second use state of the drawbar clamp of the present utility model;

Fig. 3 schematically shows the structure of the third use state of the drawbar clamp of the present utility model;

Fig. 4 schematically shows the overall structure of the drawbar clamp of the present utility model;

Fig. 5 schematically shows the structure of the drawbar in the prior art. the

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. the

Referring to Fig. 1 to Fig. 4, the structure of the drawbar clamp according to the present utility model is shown, as shown in the figures, the drawbar clamp comprises: a bottom plate 1, two cylindrical supports 2, a first pressing structure 3 And center clamping structure 4. the

Wherein, the bottom plate 1 is clamped and fixed on a numerical control machine tool (such as a numerical control end milling machine tool). Preferably, a positioning structure 7 is provided on the bottom surface of the bottom plate 1 matched with the worktable of the CNC machine tool, so that the bottom plate 1 can be quickly installed on the workbench. The positioning structure 7 is, for example, a positioning groove or a positioning key. In addition, in order to facilitate the replacement of fixtures by the CNC machine tool, two threaded holes 8 are further provided on the bottom plate for hoisting. the

The two cylindrical supports 2 are fixedly arranged on the bottom plate 1 , and the two inner holes 21 of the two cylindrical supports 2 correspond to the two inner holes 91 at the end of the drawbar 1 . That is, the sizes of the inner holes 21 of the two cylindrical supports 2 and the two inner holes 91 of the drawbar end 90 are basically the same, and the distance between the inner holes 21 of the two cylindrical supports 2 on the bottom plate 1 is The distance between the centers of the two inner holes 91 of the drawbar end 90 is basically the same. On the one hand, the cylindrical support 2 plays a role of supporting the drawbar 9, so that the drawbar only contacts with the support end surface of the cylindrical support, which is easy to ensure the machining accuracy; on the other hand, the cylindrical support 2 The inner hole 21 corresponds to the inner hole 91 of the drawbar end 90. When the drawbar 9 is installed, the drawbar 9 is placed on the support end face of the cylindrical support 2. It is only necessary to ensure that the drawbar 9 and the cylindrical Accurate positioning of the drawbar can be realized by aligning the inner holes of the support member 2 one by one, which facilitates alignment of the drawbar and ensures the machining accuracy of the drawbar 9 . Preferably, each cylindrical support 2 is provided with a chip removal hole 22, such as a square hole as shown in the figure, which is used to clean up the steel cutting during processing, so as to avoid the impact of waste piled up in the cylindrical support 2. Processing quality. the

The detachable first pressing structure 3 is installed on the bottom plate 1 and located between the two cylindrical supports 2 , and forms a clamping space for clamping the drawbar shaft 92 with the two cylindrical supports 2 . Because the thickness of the two ends 90 of the drawbar 9 is greater than the thickness of the middle shaft 92, when the drawbar 9 is placed on the cylindrical support 2, the drawbar shaft 92 is clamped by the first pressing structure 3 , the drawbar can be clamped on the basis of not affecting the end 90 of the drawbar 9, so that the upper and lower end faces of the drawbar end can be milled. the

A kind of preferred embodiment of the first pressing structure 3 is shown in Fig. 1, as shown in the figure, comprise: the first base frame 31 of concave shape, its concave bottom is for example fixed on the base plate 1 by the mode of welding; Two first pressing plates 32 are overlapped on the opening ends of the first base frame 31 respectively, and the pressing ends of the two first pressing plates 32 are arranged oppositely, and respectively have a structure suitable for clamping the drawbar shaft 92; A first connecting bolt 33 and a first compression nut 34 corresponding to a pressing plate 32, wherein the bolt head of the first connecting bolt 33 is T-shaped, and snapped into the T-shaped positioning groove 311 of the concave bottom of the first base frame Among them, its threaded end passes through the through hole on the first pressure plate 32 and is screwed with the first compression nut 34 . When the drawbar 9 is supported on the cylindrical support member 2 , the pressing ends of the two first pressing plates 32 are pressed against different sides of the drawbar shaft 92 to clamp the drawbar 9 . It can be seen from the figure that, preferably, the extension direction of the concave bottom of the first base frame 31 is perpendicular to the line connecting the centers of the two cylindrical supports, so that the force on the drawbar 9 is balanced. the

In order to avoid the bending deformation of the middle part of the drawbar shaft 92 under force, a height-adjustable support structure (not shown in the figure) is further provided at the concave bottom of the first base frame 31 at the position corresponding to the drawbar shaft 92 . out). Preferably, the support structure is a support bolt, which is screwed to the concave bottom of the first base frame 31 to achieve the purpose of adjustable support height. the

The drawbar clamp with the above-mentioned cylindrical support 2 and the first compression structure 3 can meet the clamping requirements of the following processing techniques of the drawbar 9: First, under the clamping of the first compression structure 3, the The end faces 90 of the two ends of the drawbar 9 are milled flat, and the second is that the inner holes 91 of the two ends 90 of the drawbar can be bored and chamfered. Because the inner hole 21 of the cylindrical support 2 corresponds to the inner hole 91 of the drawbar 9 one by one, and the size is roughly equal, so when processing the inner hole 91 of the drawbar end, the inner hole of the end and the cylinder It is very convenient to align the machining center by aligning the inner holes of the shaped support, thus saving the machining time. Preferably, the diameters of the inner holes 21 of the two cylindrical supports 2 are slightly larger than the diameters of the inner holes 91 of the drawbar end 90, so as not to affect the drawing rod without affecting the boring process of the inner hole of the drawbar. Alignment of rod 9. the

Referring to FIG. 2 , a center-of-circle clamping structure 4 detachably connected to the bottom plate 1 is also provided at the center of each cylindrical support member 2 . Through the cooperation of the center of circle clamping structure 4 and the cylindrical support member 2, the drawbar 9 can be clamped and fixed to meet the clamping requirements for processing the periphery of the drawbar 9. It can be seen from the figure that the wall thickness of the cylindrical support part only needs to meet the supporting effect of the drawbar. In order not to affect the peripheral processing of the drawbar, the wall thickness of the cylindrical support part 2 is obviously smaller than that of the drawbar end. Head 90 wall thickness. the

A preferred structure of the center-of-circle clamping structure 4 is shown in the figure. As shown in the figure, it includes: a threaded rod 41 with threaded sections at both ends, one end of which is screwed to the bottom plate 1, and the screw hole of the screwed connection is located in the cylinder The center of the inner hole of the support member 2; the central pressing arm 42 of the center radial shape is sleeved on the threaded rod 41, and forms a clamping space suitable for clamping the drawbar end 90 with the cylindrical support member 2, as shown in the figure It can be seen that the central pressing arm 42 has three evenly distributed pressing arms to apply force evenly to the end 90 of the drawbar; the locking nut 43 is screwed to the other end of the threaded rod 41 . the

In addition, in order to avoid twisting or misalignment of the drawbar 9 when the drawbar 9 is bored and inner hole chamfered, a detachable second clamp is provided at the position of the bottom plate 1 corresponding to the outer side of the cylindrical support 2 . The structure 5, the detachable second pressing structure 5 and the cylindrical support 2 cooperate to clamp the end 90 of the drawbar. When processing the inner hole 91 of the draw bar, the second pressing structure 5 cooperates with the first pressing structure 3 to form a reliable clamping of the draw bar 9 . the

A preferred embodiment of the second pressing structure 5 is shown in FIG. 3 , as shown in the figure, it includes: a bent second base frame 51, the first bent portion 511 of which is fixed on the bottom plate 1; The second pressing plate 52 is lapped on the second bending portion 512 of the second base frame 51, and its pressing end has a structure suitable for clamping the outer edge of the drawbar end 90; the second connecting bolt 53 has a bolt head in the shape of T-shaped, clamped in the T-shaped positioning groove of the first bending part 511 of the second base frame 51 , and its threaded end passes through the through hole on the second pressure plate 52 and is screwed with the second compression nut 54 . Preferably, the second pressing structures 5 are arranged on the line connecting the centers of the two cylindrical supports 2 so that the force on the drawbar 9 is uniform. the

The machining process of the draw bar of the numerically controlled machine tool that draw bar clamp of the present utility model is installed is as follows for example:

1) First, use the hoisting tool to hoist the drawbar 9 on the fixture, so that the bottom surface of the drawbar blank is attached to the support surface of the cylindrical support 2, and the operator can adjust the inner hole of the drawbar by hand 91 is roughly aligned with the inner hole 21 of the cylindrical support. the

2) Adjust the height of the support bolt so that the bolt head of the support bolt is close to the workpiece, then press the compression end of the first compression structure 3 to the workpiece, and then turn the first compression nut 34 so that the drawbar 9 is tightly clamped Fasten it tightly, as shown in Figure 1. In this way, one side end face of the drawbar end can be machined. the

3) After the upper surface of the drawbar 9 is processed, the first pressing structure 3 is released, and the drawbar 9 is also aligned and clamped after being reversed, so as to process the other end surface of the drawbar end. the

4) After the end faces of both sides of the drawbar end 90 are processed, install the center clamping structure 4 on the bottom plate 1, fix and clamp the workpiece, and then loosen the first clamping structure 3, as shown in Figure 2, the disassembled The parts of the first pressing structure 3 are placed in other positions, so that the periphery of the draw bar 9 can be processed. the

5) After the peripheral processing of the draw bar 9 is completed, install the first pressing structure 3 and the second pressing structure 5 on the bottom plate 1, press and fix the draw bar 9, and then loosen and take away the center pressing structure 4, Just can carry out boring and chamfering processing to the inner hole of drawbar, as shown in Figure 3. the

To sum up, the drawbar clamp provided by the utility model is equipped with a cylindrical support for supporting the drawbar and facilitating alignment by installing a cylindrical support on the bottom plate matched with the CNC machine tool, and is equipped with multiple pressing structures, Using different clamping structures in different processing techniques can facilitate clamping and alignment, quickly and accurately clamp and fix the drawbar, centralize processing, save a lot of time and labor, and reduce labor intensity and The number of people, greatly improving production efficiency and quality, so that the drawbar can be mass-produced smoothly to meet the production needs of locomotives. Moreover, the drawbar clamp has the advantages of simple structure, convenient manufacture and low cost. the

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model. the

Claims (10)

1. draw bar anchor clamps is characterized in that, comprising:

Base plate (1);

Two cylindrical shape support members (2) are arranged on the described base plate (1), and two endoporus (21) of described two cylindrical shape support members (2) are corresponding one by one with two endoporus (91) of described draw bar (9) termination;

Dismountable first compressing structure (3) is installed in described base plate (1) and goes up and be positioned between described two cylindrical shape support members (2), forms the grasping part of the described draw bar shafts of clamping (92) with described two cylindrical shape support members (2); And,

With the center of circle clamping structure (4) that described base plate (1) removably connects, be arranged on the home position of each described cylindrical shape support member (2).

2. draw bar anchor clamps according to claim 1 is characterized in that, described first compressing structure (3) comprising:

First pedestal (31) of spill is fixed on the described base plate (1);

Two first pressing plates (32) are overlapped on respectively on the openend of described first pedestal (31), and the end that compresses of described two first pressing plates (32) is oppositely arranged;

With each corresponding first connecting bolt of described first pressing plate (32) (33) and first clamp nut (34), wherein, the bolt head of described first connecting bolt (33) is the T type, be connected in the T type locating slot (311) of concave bottom of described first pedestal (31), its end of thread is spirally connected with described first clamp nut (34) after passing through hole on described first pressing plate.

3. draw bar anchor clamps according to claim 2 is characterized in that, described center of circle clamping structure comprises:

Two ends all have the threaded rod (41) of thread segment, and one end and described base plate (1) are spirally connected;

The center pressure arm (42) that is center radiation shape is set on the described threaded rod (41), forms the grasping part that is fit to the described draw bar of clamping (9) termination with described cylindrical shape support member (2);

Locking nut (43) is screwed onto the other end of described threaded rod (41).

4. draw bar anchor clamps according to claim 3 is characterized in that, the outside of each described cylindrical shape support member (2) is provided with dismountable second compressing structure (5),

Described second compressing structure comprises:

Second pedestal (51) that is bending shape, its first bending part (511) is fixed on the described base plate (1);

Second pressing plate (52) is overlapped on second bending part (512) of described second pedestal, and it compresses end and has the structure that is fit to chucking outer, described draw bar termination;

Second connecting bolt (53), its bolt head is the T type, is connected in the T type locating slot of first bending part of described second pedestal, and its end of thread is spirally connected with second clamp nut (54) after passing through hole on described second pressing plate.

5. draw bar anchor clamps according to claim 4, it is characterized in that, the outside of each described cylindrical shape support member (2) all is provided with described second compressing structure (5), and described two second compressing structures all are arranged on the circle center line connecting of described two cylindrical shape support members.

6. draw bar anchor clamps according to claim 5 is characterized in that, the bearing of trend of the concave bottom of described first pedestal (31) is perpendicular to the circle center line connecting of described two cylindrical shape support members; The position of corresponding described draw bar shaft also is provided with Height Adjustable supporting construction (6) on the concave bottom of described first pedestal.

7. draw bar anchor clamps according to claim 6 is characterized in that, described supporting construction (6) is a carrying bolt, are spirally connected with the concave bottom of described first pedestal.

8. draw bar anchor clamps according to claim 1 is characterized in that, each described cylindrical shape support member (2) all offers chip-removal hole (22).

9. draw bar anchor clamps according to claim 1 is characterized in that, the diameter of bore of described two cylindrical shape support members (2) is all greater than the diameter of bore of described draw bar termination.

10. draw bar anchor clamps according to claim 1 is characterized in that, described base plate (1) is provided with the location structure (7) that matches with the workbench of Digit Control Machine Tool, and the lifting screwed hole (8) that is used to lift.

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