A lathe tailstock locking device

Abstract

This utility model discloses a tailstock locking device for lathes, including a tailstock slide plate, a nut seat, several wedges, and several fixing members. The tailstock slide plate has a connecting through hole and a recess. The recess is located on one side of the connecting through hole and communicates with it. The extension direction of the recess is perpendicular to the sliding direction of the tailstock body. The nut seat at least partially passes through the connecting through hole, and the side of the nut seat and the recess form a wedge-shaped groove. The wedges are adapted to the wedge-shaped groove. Several wedges are arranged at intervals along the same straight line in the wedge-shaped groove. The wedges have wedge-shaped inclined surfaces, and the recess has an inner inclined surface adapted to the wedge-shaped inclined surface. Each fixing member is configured to pass through the corresponding wedge and be securely connected to the recess. When the fixing member moves the wedge, the wedge-shaped inclined surface of the wedge and the inner inclined surface of the recess are in close contact to lock the nut seat in the connecting through hole. This solves the problems of high assembly requirements and unstable connection in traditional lathe tailstock fixing methods.

Description

Technical Field

[0001] This utility model relates to the field of lathe tailstock technology, and in particular to a lathe tailstock locking device. Background Technology

[0002] CNC lathes are important machining equipment. When machining long shaft parts, to reduce vibration, a tailstock with a center is installed at one end of the long shaft part. The center on the tailstock holds the part in place, reducing vibration and improving machining accuracy. Currently, most lathe tailstocks are driven by a lead screw mechanism. The lead screw and nut are generally connected and fixed to the lathe tailstock by four screws. Ensuring flatness between the two is crucial, requiring high assembly precision. Furthermore, the connection between the lathe tailstock and the lead screw and nut is easily compromised by screws, leading to slippage and decreased fit accuracy. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides a lathe tailstock locking device to solve the problems of high assembly requirements and unstable connection in traditional lathe tailstock fixing methods.

[0004] This utility model is achieved using the following technical solution:

[0005] A tailstock locking device for a lathe includes a tailstock slide plate for connecting to a tailstock body, a nut seat for connecting to a lead screw nut, several wedges, and several fixing members. The tailstock slide plate has a connecting through hole and a recess. The recess is located on one side of the connecting through hole and communicates with the connecting through hole. The extending direction of the recess is perpendicular to the sliding direction of the tailstock body. The nut seat is at least partially inserted into the connecting through hole, and the side of the nut seat and the recess form a wedge-shaped groove. The wedges are adapted to the wedge-shaped groove and have a wedge-shaped inclined surface. The recess has an inner inclined surface adapted to the wedge-shaped inclined surface. Each fixing member is configured to pass through the corresponding wedge and be securely connected to the recess. When the fixing member moves the wedge, the wedge-shaped inclined surface of the wedge and the inner inclined surface of the recess are in close contact to lock the nut seat in the connecting through hole.

[0006] Furthermore, the angle between the inner inclined surface and the axial direction is an acute angle.

[0007] Furthermore, the angle between the inner inclined surface and the axial direction is 15 degrees.

[0008] Furthermore, a fixing hole is provided on the bottom surface of the recess, and an axial through hole is provided on the wedge. One end of the fixing member passes through the axial through hole and is threadedly connected to the fixing hole.

[0009] Furthermore, the fixing member includes a rod portion having an external thread, and the fixing hole having an internal thread adapted to the external thread of the rod portion. One end of the rod portion passes through the axial through hole and is inserted into the fixing hole, where it is adapted to the internal thread of the fixing hole.

[0010] Furthermore, the wedge block is also provided with a countersunk hole communicating with the axial through hole, and the fixing member also includes a cap connected to the rod, the cap being accommodated in the countersunk hole.

[0011] Furthermore, the nut seat is detachably connected to the lead screw nut.

[0012] Furthermore, the nut seat and the lead screw nut are connected by screws.

[0013] Furthermore, the nut seat includes a mounting portion, the top of which is provided with a fixing portion, the fixing portion extending into the connecting through hole, and the mounting portion sleeved on the outside of the lead screw nut.

[0014] Furthermore, two parallel linear guide rails are provided below the tailstock slide plate. The bottom of the tailstock slide plate slides in cooperation with the linear guide rails via a slider. A transmission screw is provided between the two linear guide rails. The screw nut is sleeved on the transmission screw and the two are threaded together. The nut seat is sleeved on the outside of the screw nut.

[0015] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0016] This invention utilizes the cooperation of wedges and fasteners. By employing the inner inclined surface of the recess and the wedge-shaped inclined surface of the wedge, the wedge is embedded into a wedge-shaped groove, and then the fastener locks the wedge within the groove, thus firmly locking the nut seat within the connecting through hole. This achieves the locking of the tailstock slide plate and the nut seat. Furthermore, the inclined side of the wedge further ensures the nut seat's stability, preventing loosening. With multiple wedges and numerous locking points, the locking force is significantly increased. Compared to traditional screw fixing methods, this invention's locking device offers greater locking force, more uniform locking distribution, greatly reduced assembly requirements, and convenient disassembly and installation. It saves considerable manpower and time, has lower manufacturing costs, and is reusable. Attached Figure Description

[0017] Figure 1 This is an assembly drawing of the tailstock body and the linear guide rail according to an embodiment of this utility model;

[0018] Figure 2 yes Figure 1 A sectional view of the structure;

[0019] Figure 3This is an assembly drawing of the tailstock slide plate and nut seat according to an embodiment of the present utility model;

[0020] Figure 4 yes Figure 3 A sectional view of the structure;

[0021] Figure 5 This is a schematic diagram of the tailstock sliding plate according to an embodiment of the present utility model;

[0022] Figure 6 This is a cross-sectional view of the tailstock sliding plate according to an embodiment of the present utility model;

[0023] Figure 7 This is a schematic diagram of the wedge block according to an embodiment of the present utility model;

[0024] Figure 8 This is a cross-sectional view of the wedge block according to an embodiment of the present utility model;

[0025] Figure 9 This is a schematic diagram of a nut holder according to an embodiment of the present utility model;

[0026] In the diagram: 1. Tailstock body; 2. Lead screw nut; 3. Tailstock slide plate; 31. Connecting through hole; 32. Recessed part; 321. Inner inclined surface; 322. Fixing hole; 4. Nut seat; 41. Mounting part; 42. Fixing part; 5. Wedge block; 51. Wedge inclined surface; 52. Axial through hole; 53. Countersunk hole; 6. Linear guide rail; 7. Slider; 8. Fixing component; 9. Transmission lead screw. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0028] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0029] like Figures 1 to 9As shown, this utility model provides a lathe tailstock locking device, including a tailstock slide plate 3 for connecting to the tailstock body 1, a nut seat 4 for connecting to the lead screw nut 2, several wedges 5, and several fixing parts 8. The tailstock slide plate 3 is provided with a connecting through hole 31 and a recess 32. The recess 32 is located on one side of the connecting through hole 31 and communicates with the connecting through hole 31. The extending direction of the recess 32 is perpendicular to the sliding direction of the tailstock body 1. The nut seat 4 passes through the connecting through hole 31 and the lead screw nut 2... The side of the female seat 4 and the recessed portion 32 form a wedge-shaped groove. The wedge block 5 is adapted to the wedge-shaped groove. The wedge block 5 has a wedge-shaped inclined surface 51. The recessed portion 32 has an inner inclined surface 321 adapted to the wedge-shaped inclined surface 51. Each of the fixing members 8 is configured to pass through the corresponding wedge block 5 and be fastened to the recessed portion 32. When the fixing member 8 moves the wedge block 5, the wedge-shaped inclined surface 51 of the wedge block 5 and the inner inclined surface 321 of the recessed portion 32 are in close contact with each other to lock the nut seat 4 in the connecting through hole 31.

[0030] In this embodiment, during assembly, the nut seat 4 is connected to the lead screw nut 2. The nut seat 4 is at least partially inserted into the connecting through hole 31 of the tailstock slide plate 3, so that the side of the nut seat 4 and the recess 32 surround to form a wedge-shaped groove. Then, several wedges 5 are arranged at intervals along the same straight line in the wedge-shaped groove. Next, the wedges 5 and the recess 32 are fastened together by the fastener 8. During the movement of the wedges 5 driven by the fastener 8, the wedges 5 are locked in the wedge-shaped groove under the cooperation of the wedge inclined surface 51 and the inner inclined surface 321, thereby locking the nut seat 4 in the connecting through hole 31, realizing the fixed connection between the nut seat 4 and the tailstock slide plate 3, and thus fixing the tailstock body 1 and the lead screw nut 2.

[0031] This invention utilizes the cooperation of wedge 5 and fixing member 8. By employing the design of the inner inclined surface 321 of the recessed portion 32 and the wedge inclined surface 51 of the wedge 5, the wedge 5 is embedded into the wedge-shaped groove, and then the fixing member 8 locks the wedge 5 within the wedge-shaped groove. This securely locks the nut seat 4 within the connecting through hole 31, achieving the locking of the tailstock slide plate 3 and the nut seat 4. Furthermore, the inclined surface of the wedge 5 further ensures the firmness of the nut seat 4, preventing loosening. Moreover, the multiple wedges 5 provide numerous locking points, significantly increasing the locking force. Compared to traditional screw fixing methods, this invention's locking device offers greater locking force, more uniform locking distribution, significantly reduced assembly requirements, and convenient disassembly and installation, saving considerable manpower and time. It also has lower manufacturing costs and is reusable.

[0032] In a preferred embodiment, the angle between the inner inclined surface 321 and the axial direction is an acute angle. This results in a greater locking force between the wedge block 5 and the recessed portion 32.

[0033] In a preferred embodiment, the angle between the inner inclined surface 321 and the axial direction is 15 degrees. Tests have shown that this angle of the inner inclined surface 321 provides better locking force. Of course, the angle of the inner inclined surface 321 can be designed and adjusted according to the locking requirements of the recess 32 and the wedge block 5.

[0034] In a preferred embodiment, a fixing hole 322 is provided on the bottom surface of the recessed portion 32, and an axial through hole 52 is provided on the wedge block 5. One end of the fixing member 8 passes through the axial through hole 52 and is threadedly connected to the fixing hole 322.

[0035] In this embodiment, during the process of the fixing member 8 pressing the wedge 5 into the recess 32, the wedge 5 uses the inner inclined surface 321 of the recess 32 to press and fix the nut seat 4, thereby achieving a locking connection between the nut seat 4 and the tailstock slide plate 3. When the fixing member 8 drives the wedge 5 to move in the opposite direction, the wedge 5 gradually loosens from the recess 32 and finally completely disengages from the recess 32, unlocking the nut seat 4 from the tailstock slide plate 3. Pressing the wedge 5 into the recess 32 by the fixing member 8 has the characteristics of simple operation and convenient disassembly.

[0036] In a preferred embodiment, the fixing member 8 includes a rod portion having an external thread, and the fixing hole 322 having an internal thread that matches the external thread of the rod portion. One end of the rod portion passes through the axial through hole 52 and is inserted into the fixing hole 322, where it matches the internal thread of the fixing hole 322.

[0037] In this embodiment, the fastener 8 is locked in the fixing hole 322 by a threaded connection. In this way, the wedge block 5 can be pressed into the wedge groove by pressing the fastener 8 into the recess 32. It has the characteristics of simple structure and convenient operation.

[0038] In a preferred embodiment, the wedge block 5 is further provided with a countersunk hole 53 communicating with the axial through hole 52, and the fixing member 8 also includes a cap connected to the rod, the cap being accommodated in the countersunk hole 53.

[0039] In this embodiment, the fastener 8 is preferably a screw. In order to prevent the screw head from protruding and affecting the assembly of the tailstock body 1, the head is accommodated by the countersunk hole 53 to ensure the flatness of the top surface of the wedge block 5.

[0040] In a preferred embodiment, the nut seat 4 is detachably connected to the lead screw nut 2. This facilitates subsequent maintenance and replacement.

[0041] Specifically, the nut seat 4 and the lead screw nut 2 are connected by screws.

[0042] In a preferred embodiment, the nut seat 4 includes a mounting portion 41, and a fixing portion 42 is provided on the top of the mounting portion 41. The fixing portion 42 extends into the connecting through hole 31, and the mounting portion 41 is sleeved on the outside of the lead screw nut 2. The nut seat 4 of this embodiment includes a two-part structure, wherein the fixing portion 42 is locked in the connecting through hole 31, and the mounting portion 41 is connected to the lead screw nut 2. The structure is simple and the assembly requirements are low.

[0043] In a preferred embodiment, two parallel linear guide rails 6 are provided below the tailstock slide plate 3. The bottom of the tailstock slide plate 3 is slidably engaged with the linear guide rails 6 via a slider 7. A transmission screw 9 is provided between the two linear guide rails 6. The screw nut 2 is sleeved on the transmission screw 9 and the two are threadedly connected. The nut seat 4 is sleeved on the outside of the screw nut 2.

[0044] In this embodiment, the rotation of the transmission screw 9 can be driven by a motor. The tailstock slide plate 3 slides with the linear guide rail 6 through the slider 7. After the tailstock body 1 is installed on the top of the tailstock slide plate 3, the tailstock body 1 can move repeatedly along the extension direction of the linear guide rail 6. The transmission screw 9 is arranged between the two linear guide rails 6, which facilitates the connection of the screw nut 2 and the tailstock body 1.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A lathe tailstock locking device, characterized by, The device includes a tailstock slide plate (3) for connecting to the tailstock body (1), a nut seat (4) for connecting to the lead screw nut (2), several wedges (5), and several fasteners (8). The tailstock slide plate (3) has a connecting through hole (31) and a recess (32). The recess (32) is located on one side of the connecting through hole (31) and communicates with the connecting through hole (31). The extending direction of the recess (32) is perpendicular to the sliding direction of the tailstock body (1). The nut seat (4) is at least partially inserted into the connecting through hole (31), and the side of the nut seat (4) and the recess (32) enclose each other to form a wedge-shaped groove. The wedge (5) is adapted to the wedge groove. Several wedges (5) are arranged at intervals along the same straight line in the wedge groove. The wedge (5) has a wedge slope (51). The recess (32) has an inner slope (321) adapted to the wedge slope (51). Each of the fixing members (8) is configured to pass through the corresponding wedge (5) and be fastened to the recess (32). When the fixing member (8) moves the wedge (5), the wedge slope (51) of the wedge (5) and the inner slope (321) of the recess (32) are in close contact with each other to lock the nut seat (4) in the connecting through hole (31).

2. The lathe tailstock locking device according to claim 1, characterized in that, The angle between the inner inclined surface (321) and the axial direction is an acute angle.

3. The lathe tailstock locking device of claim 2, wherein, The angle between the inner inclined surface (321) and the axial direction is 15 degrees.

4. The lathe tailstock locking device of claim 1, wherein A fixing hole (322) is provided on the bottom surface of the recess (32), and an axial through hole (52) is provided on the wedge (5). One end of the fixing member (8) passes through the axial through hole (52) and is threadedly connected to the fixing hole (322).

5. The lathe tailstock locking device of claim 4, wherein, The fastener (8) includes a rod with an external thread, and the fixing hole (322) has an internal thread that matches the external thread of the rod. One end of the rod passes through the axial through hole (52) and is inserted into the fixing hole (322) and matches the internal thread of the fixing hole (322).

6. The lathe tailstock locking device of claim 5, wherein, The wedge (5) is also provided with a countersunk hole (53) communicating with the axial through hole (52), and the fastener (8) also includes a cap connected to the rod, the cap being accommodated in the countersunk hole (53).

7. The lathe tailstock locking device of claim 1, wherein The nut seat (4) is detachably connected to the lead screw nut (2).

8. The lathe tailstock locking device of claim 7, wherein, The nut seat (4) is connected to the lead screw nut (2) by screws.

9. The lathe tailstock locking device of claim 7, wherein, The nut seat (4) includes a mounting part (41), and a fixing part (42) is provided on the top of the mounting part (41). The fixing part (42) extends into the connecting through hole (31), and the mounting part (41) is sleeved on the outside of the lead screw nut (2).

10. The lathe tailstock locking device according to claim 1, characterized in that, The tailstock slide plate (3) is provided with two parallel linear guide rails (6) below it. The bottom of the tailstock slide plate (3) is slidably engaged with the linear guide rails (6) through a slider (7). A transmission screw (9) is provided between the two linear guide rails (6). The screw nut (2) is sleeved on the transmission screw (9) and the two are threaded together. The nut seat (4) is sleeved on the outside of the screw nut (2).

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