Pushing and pressing structure of axial part of machine tool workbench worm

Abstract

The utility model discloses a pushing and pressing structure of a machine tool workbench worm axial component. The pushing and pressing structure comprises a base and a sliding sleeve. A first shaft shoulder and a second shaft shoulder which are adjacent to each other are arranged on the outer surface of the base; the first shaft shoulder is close to one end of the base, and the outer diameter of the first shaft shoulder is smaller than that of the second shaft shoulder; a counter bore with the diameter smaller than that of the second shaft shoulder is formed in the other end of the base, an oil hole extending along the side wall of the base is formed in the bottom wall of the counter bore, and the tail end of the oil hole is exposed between the first shaft shoulder and the second shaft shoulder. The sliding sleeve is provided with a first step face matched with the step side face of the first shaft shoulder and a second step face matched with the step side face of the second shaft shoulder. The sleeve shaft connecting structure design is adopted, the sliding sleeve is pushed to move through pressure oil, the sliding sleeve extrudes a workpiece, pressure transmission is efficient, the workpiece is prevented from axially moving, the stable axial locking and positioning function is achieved, and stable meshing work of a worm pair of a machine tool workbench is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of machine tool accessories, in particular to a pushing structure of a worm axial component of a machine tool worktable. Background Art

[0002] The rotary indexing worm and worm wheel of the machine tool's worktable will wear out during long-term meshing, causing the gap between the gear teeth of the worm wheel pair to increase. This gap is called the tooth side clearance. The existence of the tooth side clearance causes the worktable indexing worm pair to be unstable, which directly affects the rotary indexing accuracy of the worktable and causes the transmission error to increase. Therefore, in the existing machine tool worktable rotary indexing worm pair transmission structure, an axial push structure is needed to stabilize and eliminate the axial movement of the worm to ensure a stable working state. Utility Model Content

[0003] In view of the defects in the prior art, the utility model provides a pushing structure of the axial component of the worm gear of a machine tool worktable, including a base and a sliding sleeve; the outer surface of the base is provided with a first shoulder and a second shoulder adjacent to each other; the first shoulder is close to one end of the base, and the outer diameter of the first shoulder is smaller than the outer diameter of the second shoulder; the other end of the base is provided with a countersunk hole with a diameter smaller than the second shoulder, the bottom wall of the countersunk hole is provided with an oil hole extending along the side wall of the base, and the end of the oil hole is exposed between the first shoulder and the second shoulder; the sliding sleeve is provided with a first step surface adapted to the step side of the first shoulder, and a second step surface adapted to the step side of the second shoulder; the sliding sleeve is sleeved on the outside of the base, and the step side of the first shoulder is slidably sealed and connected to the first step surface, and the step side of the second shoulder is slidably sealed and connected to the second step surface, and the side of the second step surface is pushed by the hydraulic oil in the oil hole, so that the sliding sleeve slides along the axial direction of the base.

[0004] The beneficial effects of the utility model are: adopting a sleeve-shaft connection structure design, the sleeve is pushed to move by pressure oil, the sleeve squeezes the workpiece, the pressure transmission is efficient, the workpiece is prevented from axial movement, and has a stable axial locking and positioning function, which is beneficial to reducing the tooth side clearance of the machine tool gear, and the movement of the movable worktable is more precise.

[0005] Preferably, the step side of the first shoulder and the first step surface, and the step side of the second shoulder and the second step surface are both sealed by a sealing ring. A sealing cavity is formed between the end of the oil hole and the two sealing rings. When the hydraulic oil reaches the sealing cavity, the hydraulic oil pushes the side of the first step surface to move axially. The two sealing rings ensure that the hydraulic oil does not leak.

[0006] Preferably, the base is provided with a third shoulder having a diameter greater than that of the second shoulder on the outside, and an outer shell is provided on the outside of the third shoulder. The outer shell is connected to other parts to play a connecting role.

[0007] Preferably, a flange is provided on the outside of one end of the base, and a plurality of axial assembly holes are evenly distributed along the circumference of the flange, and the flange and the countersunk hole are located at the same end of the base. The assembly hole of the flange is connected to the machine tool by bolts, meeting the installation requirements of most machine tools.

[0008] Preferably, the side wall of the base is provided with a side hole connected to the oil hole, and a plug is provided at the end of the oil hole at the counterbore. After being blocked by the plug, the hydraulic oil can only enter and exit the oil hole from the side hole, and the hydraulic oil entering the oil hole pushes the sliding sleeve to move, and conversely, the hydraulic oil is sucked out of the oil hole to pull the sliding sleeve to move in the opposite direction.

[0009] Preferably, a mounting hole is provided at the end of the sliding sleeve, and a matching gland is provided in the mounting hole. One side of the gland contacts the bottom wall of the mounting hole, and the other side of the gland is provided with a boss in contact with the workpiece. The entire gland is in the shape of a circular ring with a certain thickness, and the boss on the outside is also a circular ring. The shape of the boss is adapted to the shape of the force contact surface of the workpiece, and is dedicated to a specific machine. The gland structure can also be changed to adapt to other workpieces.

[0010] Preferably, the base and the gland are both provided with axially penetrating through holes. The base sleeve is used on the moving shaft of the machine tool, and the moving shaft, the gland and the sliding sleeve move axially synchronously relative to the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0012] Figure 1 It is a structural schematic diagram of this embodiment;

[0013] Figure 2 for Figure 1 A three-dimensional image with the outer shell hidden in the middle;

[0014] Figure 3 for Figure 1 Schematic diagram of the middle sleeve squeezing the workpiece to the right.

[0015] In the accompanying drawings, base 1, sleeve 2, first shoulder 3, second shoulder 4, third shoulder 5, outer shell 6, countersunk hole 7, flange 8, assembly hole 9, oil hole 10, first step surface 11, second step surface 12, sealing ring 13, side hole 14, plug 15, mounting hole 16, pressure cover 17, boss 18, through hole 19, movable shaft 20, and workpiece 21. DETAILED DESCRIPTION

[0016] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0017] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0018] like Figure 1 As shown, this embodiment provides a pushing structure for the axial component of the worm gear of a machine tool worktable, including a base 1 and a sleeve 2; the outer surface of the base 1 is provided with adjacent first shoulder 3, second shoulder 4 and third shoulder 5, the outer diameters of the first shoulder 3, the second shoulder 4 and the third shoulder 5 increase successively, and the first shoulder 3 is close to the right end of the base 1. An outer shell 6 is provided on the outside of the third shoulder 5. The outer shell 6 is connected with other parts to play a connecting role. The left end of the base 1 is provided with a countersunk hole 7 with a diameter smaller than the second shoulder 4, and the outside of the left end of the base 1 is provided with a flange 8, and a plurality of axial assembly holes 9 are evenly distributed along the circumference of the flange 8, and the flange 8 and the countersunk hole 7 are located at the same end of the base 1. The assembly hole 9 of the flange 8 is connected to the machine tool by bolts, which meets the installation requirements of most machine tools.

[0019] like Figure 1 and Figure 2 As shown, in this embodiment, the bottom wall of the counterbore 7 is provided with an oil hole 10 extending along the side wall of the base 1, and the end of the oil hole 10 is exposed between the first shoulder 3 and the second shoulder 4. The sleeve 2 is provided with a first step surface 11 adapted to the step side surface of the first shoulder 3, and a second step surface 12 adapted to the step side surface of the second shoulder 4.

[0020] The sliding sleeve 2 in this embodiment is sleeved on the outside of the base 1. Specifically, the step side of the first shoulder 3 is connected to the first step surface 11 in a sliding and sealing manner, and the step side of the second shoulder 4 is connected to the second step surface 12 in a sliding and sealing manner. Specifically, the step side of the first shoulder 3 and the first step surface 11, and the step side of the second shoulder 4 and the second step surface 12 are both slidably sealed by a sealing ring 13. The first step surface 11 and the second step surface 12 are both provided with an annular groove adapted to the corresponding sealing ring 13. A sealing cavity is formed between the end of the oil hole 10 and the two sealing rings 13. When the hydraulic oil reaches this sealing cavity, the hydraulic oil pushes the side of the first step surface 11 to move axially. The two sealing rings 13 ensure that the hydraulic oil does not leak.

[0021] In order to facilitate oil supply, a side hole 14 connected to the oil hole 10 is provided on the side wall of the base 1, and a plug 15 is provided at the end of the oil hole 10 at the counterbore 7. After being blocked by the plug 15, the hydraulic oil can only enter and exit the oil hole 10 from the side hole 14. When the hydraulic oil enters the oil hole 10, it pushes the sliding sleeve 2 to move. On the contrary, when the hydraulic oil is sucked out of the oil hole 10, it pulls the sliding sleeve 2 to move in the opposite direction.

[0022] In order to adapt to the workpiece 21 of the machine tool, a mounting hole 16 is provided at the end of the sliding sleeve 2, and a matching gland 17 is provided in the mounting hole 16. One side of the gland 17 contacts the bottom wall of the mounting hole 16, and the other side of the gland 17 is provided with a boss 18 that contacts the workpiece 21. The shape of the entire gland 17 is a circular ring with a certain thickness, and the boss 18 on the outside is also a circular ring. The shape of the boss 18 is adapted to the shape of the force contact surface of the workpiece 21, and it is dedicated to a specific machine. The structure of the gland 17 can also be changed to adapt to other workpieces 21.

[0023] like Figure 3 As shown, the base 1 and the gland 17 in this embodiment are both provided with an axially penetrating through hole 19. The base 1 is sleeved on the moving shaft 20 of the machine tool for use, and the moving shaft 20, the gland 17 and the sleeve 2 move axially synchronously relative to the base 1. After the hydraulic station of the machine tool is connected to the side hole 14, the hydraulic station controls the oil inlet and return of the oil hole 10, and accurately realizes the gland 17 to squeeze the workpiece 21 to the right and retract to the left within a small range, that is, it has a stable axial locking and positioning function, which is conducive to reducing the tooth side clearance of the machine tool gear, and the movement of the movable worktable is more accurate.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A pushing structure for the axial part of a worm gear on a machine tool worktable, characterized in that: Including base and sliding sleeve; The outer surface of the base is provided with a first shoulder and a second shoulder adjacent to each other; the first shoulder is close to one end of the base, and the outer diameter of the first shoulder is smaller than the outer diameter of the second shoulder; the other end of the base is provided with a countersunk hole with a diameter smaller than the second shoulder, the bottom wall of the countersunk hole is provided with an oil hole extending along the side wall of the base, and the end of the oil hole is exposed between the first shoulder and the second shoulder; The sliding sleeve is provided with a first step surface adapted to the step side surface of the first shoulder, and a second step surface adapted to the step side surface of the second shoulder; the sliding sleeve is sleeved on the outside of the base, and the step side surface of the first shoulder is slidingly sealed connected to the first step surface, and the step side surface of the second shoulder is slidingly sealed connected to the second step surface, and the hydraulic oil in the oil hole pushes the side surface of the second step surface, thereby causing the sliding sleeve to slide along the axial direction of the base.

2. The pushing structure of the worm axial component of a machine tool worktable according to claim 1, characterized in that: The step side surface of the first shaft shoulder and the first step surface, as well as the step side surface of the second shaft shoulder and the second step surface are both slidably sealed by a sealing ring.

3. The pushing structure of the axial part of the worm gear of a machine tool worktable according to claim 1, characterized in that: The outside of the base is provided with a third shoulder whose diameter is larger than that of the second shoulder.

4. The pushing structure of the worm axial component of a machine tool worktable according to claim 3, characterized in that: An outer shell is arranged outside the third shoulder.

5. The pushing structure of the axial part of the worm gear of a machine tool worktable according to claim 1, characterized in that: A flange is arranged outside one end of the base, and a plurality of axial assembly holes are evenly distributed along the circumference of the flange.

6. The pushing structure of the axial part of the worm gear of a machine tool worktable according to claim 5, characterized in that: The flange and the countersunk hole are located at the same end of the base.

7. The pushing structure of the axial part of the worm of a machine tool worktable according to claim 1, characterized in that: A side hole communicating with the oil hole is provided on the side wall of the base, and a plug is provided at the end of the oil hole at the counterbore.

8. The pushing structure of the axial part of the worm gear of a machine tool worktable according to claim 1, characterized in that: A mounting hole is provided at the end of the sliding sleeve, and a matching pressure cover is provided in the mounting hole.

9. The pushing structure of the axial part of the worm gear of a machine tool worktable according to claim 8, characterized in that: One side surface of the pressure cover contacts the bottom wall of the mounting hole, and the other side surface of the pressure cover is provided with a boss that contacts the workpiece.

10. The pushing structure of the axial part of the worm of a machine tool worktable according to claim 9, characterized in that: The base and the gland are both provided with a through hole which penetrates axially.

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