Stand column structure of gear hobbing machine

Abstract

The utility model discloses a stand column structure of a gear hobbing machine, which comprises a stand column main body, a base, a lower column body of which the bottom end is arranged at the circle center position of the base, a supporting block arranged at the top of the lower column body, an upper column body of which the bottom end is connected with the center of the top surface of the supporting block, and a limiting column which is in sliding connection with the center position of the top end of the upper column body, the supporting block is connected with a sliding column in the upper column body in a sliding manner; the clamping assembly for lifting the gear blank A comprises a hydraulic cylinder mounted on the supporting block, a clamping seat of which the bottom surface is connected with the top end of the hydraulic cylinder, a pulling column of which the top end is connected with the bottom surface of the clamping seat, and a transmission piece mounted in the supporting block; the stand column is provided with a design for conveniently assembling the gear blank A, when the hydraulic cylinder lifts the clamping base, the limiting cylinder drives the clamping ring to move downwards, when the clamping base makes contact with the gear blank A, the clamping ring is tightly attached to the gear blank A, the clamping base and the clamping ring firmly fix the gear blank A, and installation of the gear blank A is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of gear hobbing machine accessories, and particularly relates to a column structure of a gear hobbing machine. Background Art

[0002] Gear hobbing is the most widely used machine tool among gear processing machines. Gear hobbing machines process gears based on the principle of generating method. The gear hobbing process is equivalent to the process of meshing and rolling of a pair of helical gears. When the machine tool makes the hob and the workpiece rotate relative to each other strictly according to the transmission relationship of a pair of helical gears, teeth can be continuously cut on the workpiece. Gear hobbing machines can be used to cut straight teeth, helical gears, and can also process worm wheels, sprockets, etc.; the column of the gear hobbing machine is a columnar structural component with high strength and rigidity used to support the gear blank workpiece. China's utility model authorized patent CN202121844054.8 discloses a column based on gear hobbing machine gear processing. The column of the gear hobbing machine is a conventional gear hobbing machine accessory, generally installed on the gear hobbing machine tool. Its function is to enable the workpiece to be stably fixed in the processing position to prevent the workpiece from shifting during the processing;

[0003] The workpiece is usually mounted on the top of the column in a ring sleeve and is generally fixed by a fixture, such as a fixed chuck with a strong bolt. The disassembly and assembly of the workpiece requires removing the bolts on the fixed chuck, which is cumbersome and inconvenient to use.

[0004] When installing the existing gear blank workpiece, there is a problem that there is no design on the column for conveniently assembling the gear blank workpiece. For this reason, this application proposes a column structure for a gear hobbing machine. Utility Model Content

[0005] The purpose of the present utility model is to provide a column structure for a gear hobbing machine, so as to solve the problem in the above background technology that there is no design for assembling a gear blank workpiece conveniently on the column.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions: a column structure of a gear hobbing machine, comprising

[0007] The column body includes a base, a lower column with its bottom end mounted at the center of the base, a support block mounted on the top of the lower column, an upper column with its bottom end connected to the center of the top surface of the support block, a limiting cylinder slidably connected to the center of the top of the upper column, and a sliding column slidably connected to the support block and the interior of the upper column;

[0008] The clamping assembly for lifting the gear blank A includes a hydraulic cylinder mounted on the support block, a clamping seat whose bottom surface is connected to the top of the hydraulic cylinder, a pulling column whose top is connected to the bottom surface of the clamping seat, and a transmission member mounted in the support block. The transmission member includes a fixed pin mounted in the support block, a transmission connecting rod rotatably mounted on the fixed pin, a fixed block connected to the bottom end of the sliding column, and a transmission pin extending through both ends of the transmission connecting rod.

[0009] The pressing assembly for pressing the gear blank A includes a clamping ring sleeved on the outside of the limiting cylinder, a stabilizing block installed on the clamping ring, and a hand-tightened locking screw passing through the stabilizing block.

[0010] Preferably, the clamping seat is a frustum structure with a narrow top end and a wide bottom end, and the hydraulic cylinder and the pulling column on the bottom surface of the clamping seat are staggered.

[0011] Preferably, a circular groove is provided at the center position of the top of the upper cylinder for limiting the sliding of the cylinder, a movable cavity is provided inside the support block, and circular holes are provided on the support block and the upper cylinder for the sliding column to slide, and the circular hole on the upper cylinder is connected to the circular groove and the circular hole on the support block is connected to the movable cavity.

[0012] Preferably, the sliding column is located inside the support block and has an inverted "T"-shaped structure at one end. The fixed block is perpendicular to the "T"-shaped end of the sliding column. The pulling columns and fixed blocks at both ends of the transmission connecting rod are penetrated by corresponding transmission pins, and the transmission connecting rod rotates around the fixed pin as the axis.

[0013] Preferably, rectangular grooves corresponding to the pulling column and the fixing block are provided at both ends of the transmission connecting rod, and a long pin hole connected to the rectangular groove is opened on the end of the transmission connecting rod, and the transmission pin passes through the long pin hole.

[0014] Preferably, rolling bodies are provided inside both ends of the transmission connecting rod, a protruding side of the rolling body is located in the long hole of the pin shaft, and the transmission pin shaft is in rolling contact with the protruding side surface of the rolling body.

[0015] Preferably, a compression spring is sleeved on the outer side of the limiting cylinder, and a ring groove cooperating with the compression spring is provided on the bottom surface of the clamping ring. The upward movement distance H1 of the clamping seat is the same as the downward movement distance H2 of the clamping ring driven by the limiting cylinder.

[0016] Preferably, a support frame is provided on the outer side of the bottom end of the base, a vertical telescopic pole is provided at the corner position of the support frame, an air jet rod is provided on the top of the telescopic pole, and one end of the air jet rod is bent toward the gear embryo A.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In the present invention, the column is designed to facilitate the assembly of the gear blank A. When the hydraulic cylinder lifts the clamping seat, the limiting cylinder drives the clamping ring to move downward. When the clamping seat contacts the gear blank A, the clamping ring is pressed against the gear blank A. The clamping seat and the clamping ring firmly hold the gear blank A, completing the installation of the gear blank A. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of the column body of the utility model;

[0021] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of the middle B part;

[0022] Figure 4 This is a schematic cross-sectional view of the support block of the present invention;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the transmission connecting rod of the present utility model;

[0024] Figure 6 For the utility model Figure 5 The enlarged structural diagram of the middle C part;

[0025] Figure 7 This is a schematic diagram of the main structure of the transmission connecting rod rotation transmission of the utility model;

[0026] In the figure: 1. Column body; 11. Base; 12. Lower column; 13. Support block; 14. Upper column; 21. Hydraulic cylinder; 22. Clamping seat; 23. Pulling column; 31. Clamping ring; 32. Compression spring; 33. Stabilizing block; 34. Hand-tightening locking screw; 41. Support frame; 42. Telescopic column; 43. Jet rod; 51. Fixed pin; 52. Transmission connecting rod; 53. Transmission pin; 54. Fixed block; 141. Limiting cylinder; 142. Sliding column; 521. Pin long hole; 522. Rolling element. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figures 1 to 7 The utility model provides a technical solution: a column structure of a gear hobbing machine, including a column body 1, the column body 1 is installed on the machine tool by conventional methods (such as bolt fixing), and includes a base 11, a lower column 12 whose bottom end is installed at the center position of the base 11, a support block 13 installed on the top of the lower column 12, and an upper column 14 whose bottom end is connected to the center of the top surface of the support block 13. The lower column 12 is combined with the base 11 and the support block 13 by conventional methods (such as welding), and the support block 13 is combined with the upper column 14 by conventional methods (such as welding). The limiting cylinder 141 is slidably connected to the center position of the top of the upper column 14, and the bottom end of the limiting cylinder 141 is embedded in the upper column 14. The height of the limiting cylinder 141 is adjustable, and a sliding column 142 is slidably connected to the support block 13 and the upper column 14. The top end of the sliding column 142 is combined with the limiting cylinder 141 by conventional methods (such as welding). Driven by the sliding column 142, the limiting cylinder 141 moves vertically accordingly. The clamping assembly for lifting the gear embryo A includes a hydraulic cylinder 21 installed on the support block 13, a clamping seat 22 whose bottom surface is connected to the top of the hydraulic cylinder 21, a pulling column 23 whose top is connected to the bottom surface of the clamping seat 22, and a transmission member installed in the support block 13. The hydraulic cylinder 21 is combined with the support block 13 and the clamping seat 22 by conventional methods (such as bolt fixing). When the hydraulic cylinder 21 is started and becomes extended, the clamping seat 22 can be lifted, and the pulling column 23 moves up accordingly. The transmission member includes a fixed pin 51 installed in the support block 13, a transmission connecting rod 52 rotatably installed on the fixed pin 51, a fixed block 54 connected to the bottom end of the sliding column 142, and a transmission pin 53 passing through both ends of the transmission connecting rod 52. The bottom end of the upward pulling column 23 pulls one end of the transmission connecting rod 52 to rotate around the fixed pin 51 as the axis, and the other end of the transmission connecting rod 52 drives the fixed block 54, the sliding column 142 and the limiting cylinder 141 to move downward. Figure 7 When the gear is rotated as shown, the transmission pin 53 is in rolling contact with the transmission connecting rod 52. When the pulling column 23 and the transmission pin 53, the fixed block 54 and the sliding column 142 move in the vertical direction respectively, the position of the transmission pin 53 on the transmission connecting rod 52 changes to meet the transmission conditions. According to actual conditions, the combination method of the transmission parts can be adjusted, and the performance, size and shape of the fixed pin 51, the transmission connecting rod 52, the transmission pin 53 and the fixed block 54 that meet the transmission conditions can be selected; the clamping assembly for clamping the gear blank A includes a clamping ring 31 mounted on the outside of the limiting cylinder 141, a stabilizing block 33 installed on the clamping ring 31, and a hand-tightening locking screw 34 that passes through the stabilizing block 33. The clamping ring 31 installed on the outside of the limiting cylinder 141 is parallel to the gear blank A, and the hand-tightening locking screw 34 plays the role of tightening the stabilizing block 33 and the limiting cylinder 141, so that the clamping ring 31 moves in the same direction as the limiting cylinder 141.

[0030] In this embodiment, the clamping seat 22 is a frustum structure with a narrow top and a wide bottom. The inclined surface of the clamping seat 22 is conical in shape, which does not affect the hob processing of the gear blank A on the gear hobbing machine frame. The hydraulic cylinder 21 and the pulling column 23 on the bottom surface of the clamping seat 22 are staggered. The clamping seat 22 lifted by the hydraulic cylinder 21 drives the pulling column 23 to move in the same direction.

[0031] In this embodiment, a circular groove is provided at the center position of the top of the upper cylinder 14 for the limiting cylinder 141 to slide, a movable cavity is provided inside the support block 13, and circular holes are provided on the support block 13 and the upper cylinder 14 for the sliding column 142 to slide. The limiting cylinder 141 and the sliding column 142 can move vertically. The circular hole on the upper cylinder 14 is connected to the circular groove and the circular hole on the support block 13 is connected to the movable cavity, which is conducive to the movement of the upper cylinder 14 and the sliding column 142.

[0032] In this embodiment, the sliding column 142 is located at one end inside the support block 13 and is an inverted "T"-shaped structure. The fixed block 54 is perpendicular to the "T"-shaped end of the sliding column 142. The pulling columns 23 and the fixed blocks 54 at both ends of the transmission link 52 are penetrated by the corresponding transmission pin 53. The transmission link 52 rotates around the fixed pin 51. The bottom end of the upward pulling column 23 pulls one end of the transmission link 52, causing it to rotate around the fixed pin 51. The other end of the transmission link 52 drives the fixed block 54, the sliding column 142 and the limiting cylinder 141 to move downward.

[0033] In this embodiment, rectangular grooves corresponding to the pulling column 23 and the fixing block 54 are provided at both ends of the transmission connecting rod 52, and a pin shaft long hole 521 connected to the rectangular groove is opened on the end of the transmission connecting rod 52, and the transmission pin shaft 53 passes through the pin shaft long hole 521. The two ends of the pin shaft long hole 521 at one end of the transmission connecting rod 52 are c1 and c2 respectively, and the two ends of the pin shaft long hole 521 at the other end of the transmission connecting rod 52 are d1 and d2 respectively. The transmission pin shaft 53 can move in the pin shaft long hole 521. For example, the transmission pin shaft 53 close to the pulling column 23 can move from the c2 side to the c1 side as it moves upward. At the same time, the transmission pin shaft 53 close to the pulling column 23 can move from the c2 side to the c1 side as it moves upward. The transmission pin 53 of the fixed block 54 can move from the d1 side to the d2 side as it moves downward. The transmission pin 53 is movable and will not get stuck during the transmission process, and will not affect the rotation of the transmission connecting rod 52 and the transmission force, so that the fixed block 54 and the sliding column 142 move vertically downward. Rolling bodies 522 are provided inside the two ends of the transmission connecting rod 52. The protruding side of the rolling body 522 is located in the long hole 521 of the pin shaft. The transmission pin 53 is in rolling contact with the surface of the protruding side of the rolling body 522. The friction between the transmission pin 53 and the rolling body 522 is small, and it does not affect the movement of the transmission pin 53.

[0034] In this embodiment, a compression spring 32 is provided on the outer side of the limiting cylinder 141, and a ring groove is provided on the bottom surface of the clamping ring 31 to cooperate with the compression spring 32. The compression spring 32 is limited, and the compression spring 32 supports the clamping ring 31, so that it is in a suspended state, which is convenient for tightening the locking screw 34 by hand. The upward movement distance H1 of the clamping seat 22 is the same as the downward movement distance H2 of the clamping ring 31 driven by the limiting cylinder 141. When the hydraulic cylinder 21 lifts the clamping seat 22, the limiting cylinder 141 drives the clamping ring 31 to move downward. When the clamping seat 22 contacts the gear blank A, the clamping ring 31 is close to the gear blank A, and the clamping seat 22 and the clamping ring 31 firmly hold the gear blank A, completing the installation of the gear blank A.

[0035] Installation steps of gear blank A:

[0036] 1. The gear blank A is sleeved on the outside of the limiting cylinder 141 at the top of the upper cylinder 14, and the clamping ring 31 is also sleeved on the outside of the limiting cylinder 141;

[0037] 2. Adjust the angle of the clamping ring 31 so that the hand-tightening locking screw 34 is aligned with the screw hole on the limiting cylinder 141. Rotate the hand-tightening locking screw 34 so that one end is embedded in the limiting cylinder 141. The clamping ring 31 and the limiting cylinder 141 form a whole.

[0038] 3. The hydraulic cylinder 21 is activated and becomes extended, causing the clamping seat 22 to be lifted in the direction a, and the pulling column 23 moves upward accordingly;

[0039] Fourth, the bottom end of the upward pulling column 23 pulls one end of the transmission connecting rod 52, and the transmission connecting rod 52 rotates around the fixed pin 51 as the axis. The other end of the transmission connecting rod 52 drives the fixed block 54, the sliding column 142 and the limiting cylinder 141 to move downward;

[0040] 5. The limiting cylinder 141 drives the clamping ring 31 to move downward along direction b;

[0041] 6. While the hydraulic cylinder 21 lifts the clamping seat 22, the limiting cylinder 141 drives the clamping ring 31 downward. When the clamping seat 22 contacts the gear blank A, the clamping ring 31 is pressed against the gear blank A. The clamping seat 22 and the clamping ring 31 firmly hold the gear blank A, completing the installation of the gear blank A.

[0042] To sum up: the column is designed to facilitate the assembly of the gear blank A. When the hydraulic cylinder 21 lifts the clamping seat 22, the limiting cylinder 141 drives the clamping ring 31 to move downward. When the clamping seat 22 contacts the gear blank A, the clamping ring 31 is pressed against the gear blank A. The clamping seat 22 and the clamping ring 31 firmly hold the gear blank A, completing the installation of the gear blank A.

[0043] Example 2

[0044] See also Figure 1, which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment. In order to increase the chip removal effect, a support frame 41 is provided on the outside of the bottom end of the base 11. The support frame 41 and the base 11 are rotated and combined by conventional methods (such as bearings). Vertical telescopic rods 42 are provided at the corners of the support frame 41. The telescopic rod 42 and the support frame 41 are fixed by bolts. An air jet rod 43 is provided on the top of the telescopic rod 42. The telescopic rod 42 and the air jet rod 43 are fixed by hand screws. The telescopic rod 42 itself is fixed by hand-tightening plum screws. The height of the telescopic rod 42 can be adjusted. One end of the air jet rod 43 is bent towards the gear embryo A. The air jet end of the air jet rod 43 is aligned with the gear embryo A. The air jet rod 43 is connected to an external open inflation device, such as an air pump. The inflation device provides an air source. The gas is ejected from the air jet rod 43 to remove the debris remaining on the surface of the gear embryo A.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A column structure of a gear hobbing machine, characterized in that: include The column body (1) comprises a base (11), a lower column (12) whose bottom end is mounted at the center of the base (11), a support block (13) mounted on the top of the lower column (12), an upper column (14) whose bottom end is connected to the center of the top surface of the support block (13), a limiting cylinder (141) slidably connected to the center of the top of the upper column (14), and a sliding column (142) slidably connected inside the support block (13) and the upper column (14); A clamping assembly for lifting a gear embryo A comprises a hydraulic cylinder (21) mounted on a support block (13), a clamping seat (22) whose bottom surface is connected to the top of the hydraulic cylinder (21), a pulling column (23) whose top is connected to the bottom surface of the clamping seat (22), and a transmission member mounted in the support block (13), the transmission member comprising a fixed pin (51) mounted in the support block (13), a transmission connecting rod (52) rotatably mounted on the fixed pin (51), a fixed block (54) connected to the bottom end of the sliding column (142), and a transmission pin (53) passing through both ends of the transmission connecting rod (52); The clamping assembly for clamping the gear embryo A comprises a clamping ring (31) sleeved on the outside of the limiting cylinder (141), a stabilizing block (33) mounted on the clamping ring (31), and a hand-tightening locking screw (34) passing through the stabilizing block (33).

2. The column structure of a gear hobbing machine according to claim 1, characterized in that: The clamping seat (22) is a frustum structure with a narrow top end and a wide bottom end, and the hydraulic cylinder (21) and the pulling column (23) on the bottom surface of the clamping seat (22) are staggered.

3. The column structure of a gear hobbing machine according to claim 1, characterized in that: A circular groove for sliding the limiting cylinder (141) is provided at the center of the top of the upper cylinder (14), a movable cavity is provided inside the support block (13), and circular holes for sliding the sliding column (142) are provided on the support block (13) and the upper cylinder (14), the circular hole on the upper cylinder (14) is connected to the circular groove, and the circular hole on the support block (13) is connected to the movable cavity.

4. The column structure of a gear hobbing machine according to claim 1, characterized in that: The sliding column (142) is located inside the support block (13) and has an inverted "T"-shaped structure at one end. The fixed block (54) is perpendicular to the "T"-shaped end of the sliding column (142). The pulling columns (23) and the fixed block (54) at both ends of the transmission connecting rod (52) are penetrated by the corresponding transmission pin shaft (53). The transmission connecting rod (52) rotates around the fixed pin shaft (51) as the axis.

5. The column structure of a gear hobbing machine according to claim 1, characterized in that: Rectangular grooves corresponding to the pulling column (23) and the fixing block (54) are provided at both ends of the transmission connecting rod (52); a pin shaft long hole (521) communicating with the rectangular groove is opened on the end of the transmission connecting rod (52); and the transmission pin shaft (53) passes through the pin shaft long hole (521).

6. The column structure of a gear hobbing machine according to claim 5, characterized in that: Rolling bodies (522) are provided inside both ends of the transmission connecting rod (52), a protruding side of the rolling body (522) is located in the pin shaft long hole (521), and the transmission pin shaft (53) is in rolling contact with the surface of the protruding side of the rolling body (522).

7. The column structure of a gear hobbing machine according to claim 1, characterized in that: The outer side of the limiting cylinder (141) is provided with a compression spring (32), and the bottom surface of the clamping ring (31) is provided with a ring groove that cooperates with the compression spring (32). The distance H1 that the clamping seat (22) moves upward is the same as the distance H2 that the limiting cylinder (141) drives the clamping ring (31) to move downward.

8. The column structure of a gear hobbing machine according to claim 1, characterized in that: A support frame (41) is provided on the outer side of the bottom end of the base (11), and a vertical telescopic vertical rod (42) is provided at the corner position of the support frame (41). An air jet rod (43) is provided on the top end of the telescopic vertical rod (42), and one end of the air jet rod (43) is bent toward the gear embryo A.

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