CN215546945U

CN215546945U - Vertical lathe clamping mechanism

Info

Publication number: CN215546945U
Application number: CN202120939012.6U
Authority: CN
Inventors: 魏全跃
Original assignee: Zhejiang Zhongzhi Jinggong Intelligent Equipment Co ltd
Current assignee: Zhejiang Zhongzhi Jinggong Intelligent Equipment Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-01-18
Anticipated expiration: 2031-04-30

Abstract

The utility model provides a clamping mechanism of a vertical lathe, which solves the problems of low processing efficiency of workpieces and the like and comprises a sliding seat body arranged on the vertical lathe, wherein a transverse moving mechanism for driving the sliding seat body to transversely move relative to the vertical lathe is arranged between the sliding seat body and the vertical lathe, the sliding seat body is provided with a sliding table body capable of vertically lifting relative to the sliding seat body through a vertical moving mechanism, an electric main shaft assembly is arranged on the sliding table body, a rotary hydraulic cylinder is fixed above the electric main shaft assembly, and the rotary hydraulic cylinder is connected with a hydraulic chuck arranged at the lower end of the electric main shaft assembly through a pull rod. The utility model has the advantages of high processing efficiency, good clamping stability and the like.

Description

Vertical lathe clamping mechanism

Technical Field

The utility model belongs to the technical field of lathe fixtures, and particularly relates to a vertical lathe clamping mechanism.

Background

The lathe fixture is used for processing the inner and outer rotary surfaces and the end surface of a workpiece on a lathe. Most lathe fixtures are arranged on the main shaft; a few are mounted on saddles or bedbeds. The vertical lathe is different from the common lathe in that the main shaft of the vertical lathe is vertical, which is equivalent to the common lathe being vertically erected. The workbench is in a horizontal position, so that the machine is suitable for processing heavy parts with large diameter and short length. The vertical lathe can process inner and outer cylinders, conical surfaces, end planes, grooves, chamfers and the like, the operations of clamping, correcting and the like of workpieces are convenient, and the used clamp is arranged at the end head of the vertical lathe. However, in the actual use process, the tool needs to be manually clamped, so that time and labor are wasted, and the large-scale processing and production of parts are inconvenient. In addition, the conventional vertical lathe uses a jig with insufficient response sensitivity, resulting in low machining efficiency.

In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, the chinese patent document discloses an inverted lathe [201410542832.6] having a function of automatically grasping a workpiece by a spindle, which includes a bed and a beam provided on the bed; a pair of transverse guide rails are arranged on the upper side and the lower side of the cross beam, a transverse saddle capable of transversely moving along the transverse guide rails is arranged on the transverse guide rails, a pair of longitudinal guide rails perpendicular to the transverse guide rails is arranged on the transverse saddle, a longitudinal sliding plate capable of longitudinally moving up and down is arranged on the longitudinal guide rails, a main shaft is mounted on the longitudinal sliding plate, and a main shaft chuck for clamping a workpiece is arranged at the lower end of the main shaft; and a workpiece conveying device and a tool rest are respectively arranged at two ends of the lathe bed.

The problem that manual clamping of workpieces is inconvenient is solved to a certain extent by the aid of the scheme, but the scheme still has many defects, such as low workpiece machining efficiency.

Disclosure of Invention

The utility model aims to solve the problems and provides a vertical lathe clamping mechanism which is reasonable in design and high in workpiece machining efficiency.

In order to achieve the purpose, the utility model adopts the following technical scheme: the vertical lathe clamping mechanism comprises a sliding base body arranged on a vertical lathe, wherein a transverse moving mechanism for driving the sliding base body to transversely move relative to the vertical lathe is arranged between the sliding base body and the vertical lathe, a sliding table body capable of vertically lifting relative to the sliding base body is arranged on the sliding base body through the vertical moving mechanism, an electric spindle assembly is arranged on the sliding table body, a rotary hydraulic cylinder is fixed above the electric spindle assembly, and the rotary hydraulic cylinder is connected with a hydraulic chuck arranged at the lower end of the electric spindle assembly through a pull rod. The electric spindle assembly can move transversely and vertically, the upper end of the electric spindle assembly is provided with the rotary hydraulic cylinder, the hydraulic chuck is driven by the pull rod to have higher response sensitivity, the spindle is cut and connected with the mechanical clamping jaw, and the machining efficiency of the vertical lathe is improved.

In the clamping mechanism of the vertical lathe, the transverse moving mechanism comprises two parallel transverse sliding rails extending along the transverse direction of the vertical lathe, a plurality of transverse sliding blocks clamped with the transverse sliding rails are fixed on one side of the sliding base body opposite to the transverse sliding rails, transverse limiting grooves are respectively formed above and below the transverse sliding rails, transverse limiting bulges clamped with the transverse limiting grooves are formed on the transverse sliding blocks, a base plate is arranged between the transverse sliding blocks and the sliding base body, a transverse driving mechanism is installed at one end of the vertical lathe, and the transverse driving mechanism adopts gear rack transmission, lead screw transmission or hydraulic/pneumatic transmission. The transverse moving mechanism drives the sliding seat body to transversely move, the plurality of parallel transverse sliding rails improve the operation stability of the transverse moving mechanism, and a proper transverse driving mechanism is selected according to actual needs.

In foretell vertical lathe fixture, vertical moving mechanism includes two parallels and the vertical slide rail that extends along the vertical direction of the sliding table body, one side that the sliding table body is relative with vertical slide rail is fixed with a plurality of vertical sliders with vertical slide rail block, vertical spacing groove has been opened respectively to vertical slide rail both sides, it has the vertical spacing arch with vertical spacing groove block to open on the vertical slider, be provided with a plurality of slide rail briquetting between vertical slide rail and the sliding table body, the flange support is installed to sliding table body top, install vertical actuating mechanism between flange support and the sliding table body. The vertical moving mechanism is combined with a vertical sliding block by adopting a vertical sliding rail, and a flange bracket above the sliding table body is provided with a vertical driving mechanism to provide driving force.

In foretell vertical lathe fixture, vertical actuating mechanism is including installing the servo motor in flange support top, and servo motor output is down and through the coupling joint with the drive lead screw, installs the lead screw pedestal on the sliding stand body, and lead screw nut and drive lead screw connection are installed to lead screw pedestal center. The vertical driving mechanism adopts a screw rod driving mode, so that the up-and-down stepless lifting of the sliding table body is realized, and the tool setting accuracy of a workpiece is improved.

In the vertical lathe clamping mechanism, the lower end of the sliding table body is provided with the side cover plate, the side cover plate is arranged between the electric spindle assembly and the hydraulic chuck, one side, opposite to the sliding table body, of the lower portion of the side cover plate is fixedly provided with the front baffle, the other side of the lower portion of the side cover plate is fixedly provided with the upper baffle, the lower portion of the side cover plate is fixedly provided with the scrap blocking cover opposite to the side face of the hydraulic chuck, and the upper portion of the side cover plate is fixedly provided with the top cover plate for surrounding and blocking the side face of the electric spindle assembly. Each cover plate isolates the chuck from the electric spindle assembly, and chips and cutting fluid are prevented from splashing to influence the normal operation of the slide rail, the lead screw and the like.

In the clamping mechanism of the vertical lathe, an oil pipe support is fixed on the sliding table body, a plurality of guide holes through which functional oil pipes pass are formed in the oil pipe support, and grease distributors are respectively installed on two sides of the sliding seat body. The oil pipe support and the grease distributor guide lubricating oil to lubricate the lead screw guide rail, so that the running stability of the lead screw guide rail is ensured.

In the above vertical lathe clamping mechanism, the electric spindle assembly comprises a spindle box mounted on the sliding table body, an electric spindle main body is mounted at the center of the spindle box along the vertical direction, a cooling jacket is sleeved outside the electric spindle main body, and a cooling groove which is annularly coiled is formed outside the cooling jacket. When refrigerating fluid flows, the cooling groove on the outer side of the cooling sleeve takes away heat in the electric main shaft assembly, and the cooling groove is coiled to generate positive pressure to isolate external fluid in the rotating process.

In the clamping mechanism of the vertical lathe, a clamping ring is sleeved between the outer side of the upper part of the cooling sleeve and the outer side of the main shaft cover above the main shaft box, a gap is formed in the clamping ring, an adjusting bolt for adjusting the looseness of the clamping ring is arranged between the gaps, a sealing groove opposite to the inner side of the main shaft box is formed in the outer side of the cooling sleeve, and a sealing ring which is tightly attached to the main shaft box is sleeved in the sealing groove. The clamping ring improves the sealing performance of the joint of the cooling sleeve and the main shaft cover under the action of clamping force.

In the clamping mechanism of the vertical lathe, the center of the electric main shaft body is provided with a pull hole for the pull rod to pass through, and the outer side of the lower end of the electric main shaft body is provided with a sealing cylinder which is tightly pressed and fixed with the lower end of the cooling sleeve and an isolating ring which is sleeved on the outer side of the sealing cylinder. The pull rod is pulled up and down in the pull hole, and the lower end of the pull rod penetrates through the sealing cylinder and the isolating ring to be connected with the hydraulic chuck.

In foretell vertical lathe fixture, hydraulic chuck includes chuck body and the clamping jaw piece that relative chuck body centrosymmetric set up, and chuck body is connected and leaves the space between chuck body and the clamping jaw piece through the clamping jaw foot with the clamping jaw piece, and the clamping jaw foot is provided with fixed slot and the fixed strip of pegging graft and cross arrangement each other with clamping jaw piece one side relative. The fixed slot and the fixed strip are arranged in a crossed manner, so that the installation stability of the clamping jaw block is improved, and the clamping jaw block is not easy to loosen in the clamping process.

Compared with the prior art, the utility model has the advantages that: the rotary hydraulic cylinder drives the hydraulic chuck at the lower end of the electric spindle assembly to automatically clamp the tool, and the continuous machining efficiency of the vertical lathe is improved by matching the transverse moving mechanism and the vertical moving mechanism; a plurality of cover plates are arranged below the sliding table body, so that a good isolation effect is achieved on the hydraulic chuck, and chips and cutting fluid are prevented from splashing; the sealing ring and the clamping ring improve the sealing performance of the cooling jacket and avoid the leakage of cooling fluid.

Drawings

FIG. 1 is an assembly schematic of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic structural view from another perspective of the present invention;

FIG. 4 is a schematic structural view from another perspective of the present invention;

FIG. 5 is a structural cross-sectional view of the present invention;

in the figure, a vertical lathe 1, a slide base 2, a lateral moving mechanism 3, a lateral slide rail 31, a lateral slide block 32, a lateral limit groove 33, a lateral limit protrusion 34, a shim plate 35, a lateral driving mechanism 36, a vertical moving mechanism 4, a vertical slide rail 41, a vertical slide block 42, a vertical limit groove 43, a vertical limit protrusion 44, a slide rail press block 45, a flange bracket 46, a slide table body 5, a side cover plate 51, a positive baffle plate 52, an upper baffle plate 53, a chip blocking cover 54, a top cover plate 55, an oil pipe bracket 56, a guide hole 57, a grease distributor 58, an electric spindle assembly 6, a spindle box 61, an electric spindle body 62, a cooling jacket 63, a cooling groove 64, a spindle cover 65, a clamping ring 66, an adjusting bolt 67, a sealing groove 68, a sealing ring 69, a rotary hydraulic cylinder 7, a pull rod 71, a pull hole 72, a sealing cylinder 73, a packing ring 74, a hydraulic chuck 8, a chuck body 81, a clamping jaw block 82, clamping jaws 83, The device comprises a fixing groove 84, a fixing strip 85, a vertical driving mechanism 9, a servo motor 91, a coupler 92, a driving screw 93, a screw base 94 and a screw nut 95.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-5, the clamping mechanism of the vertical lathe comprises a sliding base 2 installed on the vertical lathe 1, a transverse moving mechanism 3 for driving the sliding base 2 to transversely move relative to the vertical lathe 1 is arranged between the sliding base 2 and the vertical lathe 1, a sliding table 5 capable of vertically moving relative to the sliding base 2 is installed on the sliding base 2 through a vertical moving mechanism 4, an electric spindle assembly 6 is installed on the sliding table 5, a rotary hydraulic cylinder 7 is fixed above the electric spindle assembly 6, and the rotary hydraulic cylinder 7 is connected with a hydraulic chuck 8 installed at the lower end of the electric spindle assembly 6 through a pull rod 71. The sliding seat body 2 and the sliding table body 5 move relatively independently to realize the movement of the electric spindle assembly 6 in the transverse and vertical directions, and the hydraulic chuck 8 at the lower end of the electric spindle assembly is linked with the rotary hydraulic cylinder 7 through a pull rod 71 penetrating through the electric spindle assembly 6, so that the high response efficiency is achieved.

Specifically, the transverse moving mechanism 3 includes two transverse slide rails 31 extending in parallel and along the transverse direction of the vertical lathe 1, one side of the sliding base 2 opposite to the transverse slide rails 31 is fixed with a plurality of transverse slide blocks 32 engaged with the transverse slide rails 31, the upper and lower sides of the transverse slide rails 31 are respectively provided with a transverse limiting groove 33, the transverse slide blocks 32 are provided with transverse limiting protrusions 34 engaged with the transverse limiting grooves 33, a backing plate 35 is arranged between the transverse slide blocks 32 and the sliding base 2, one end of the vertical lathe 1 is provided with a transverse driving mechanism 36, and the transverse driving mechanism 36 adopts gear rack transmission, lead screw transmission or hydraulic/pneumatic transmission. The transverse driving mechanism 36 drives the sliding seat 2 to move relative to the transverse slide rail 31, wherein the transverse limiting protrusion 34 is engaged with the transverse limiting groove 33 to keep the sliding seat 2 moving along the axial direction.

Deeply, vertical moving mechanism 4 includes two parallel vertical slide rails 41 that just extend along the vertical direction of sliding stage body 5, one side that sliding stage body 2 is relative with vertical slide rail 41 is fixed with a plurality of vertical sliders 42 with vertical slide rail 41 block, vertical spacing groove 43 has been opened respectively to vertical slide rail 41 both sides, vertical spacing arch 44 with vertical spacing groove 43 block has been opened on the vertical slider 42, be provided with a plurality of slide rail briquetting 45 between vertical slide rail 41 and the sliding stage body 5, flange bracket 46 is installed to sliding stage body 2 top, install vertical actuating mechanism 9 between flange bracket 46 and the sliding stage body 5. The shaft coupling 92 is arranged in the flange support 46, the vertical driving mechanism 9 drives the sliding table body 5 to vertically move relative to the vertical sliding rail 41, so that the hydraulic chuck 8 can vertically lift, and the sliding rail pressing blocks 45 on two sides of the vertical sliding rail 41 improve the installation stability of the vertical sliding rail 41.

Further, the vertical driving mechanism 9 includes a servo motor 91 installed above the flange bracket 46, an output end of the servo motor 91 faces downward and is connected with a driving lead screw 93 through a coupler 92, a lead screw seat 94 is installed on the sliding table 5, a lead screw nut 95 is installed at the center of the lead screw seat 94, and the lead screw nut 95 is connected with the driving lead screw 93. The servo motor 91 drives the driving screw 93 to rotate, and the screw base 94 and the screw nut 95 inside the screw base are lifted up and down under the action of torque.

Further, a side cover plate 51 is attached to the lower end of the slide table 5, the side cover plate 51 is disposed between the electric spindle unit 6 and the hydraulic chuck 8, a front baffle plate 52 is fixed to one side of the lower portion of the side cover plate 51 opposite to the slide table 5, an upper baffle plate 53 is fixed to the other side of the lower portion of the side cover plate 51, a dust blocking cover 54 is fixed to the lower portion of the side cover plate 51 opposite to the side of the hydraulic chuck 8, and a top cover plate 55 for surrounding the side of the electric spindle unit 6 is fixed to the upper portion of the side cover plate 51. The cover plate and the baffle plate are combined to isolate the hydraulic chuck 8, and simultaneously protect the electric spindle assembly 6 to prevent foreign matters from invading into the electric spindle assembly 6.

In addition, an oil pipe bracket 56 is fixed on the sliding table body 5, a plurality of guide holes 57 for oil supply pipes to pass through are formed in the oil pipe bracket 56, and grease distributors 58 are respectively installed on two sides of the sliding table body 2. The oil pipe bracket 56 guides the oil pipe to be connected with a grease distributor 58, so that the lubricating oil can uniformly flow into the rotary joint of the bearing in proportion.

Meanwhile, the electric spindle assembly 6 comprises a spindle box 61 arranged on the sliding table body 5, an electric spindle main body 62 is arranged in the center of the spindle box 61 along the vertical direction, a cooling jacket 63 is sleeved outside the electric spindle main body 62, and a cooling groove 64 which is annularly coiled is formed outside the cooling jacket 63. The cooling groove 64 on the outer side of the cooling jacket 63 faces the inner side of the spindle head 61, and the cooling fluid flows between the cooling groove and the spindle head to carry away heat generated during the operation of the electric spindle assembly 6.

A clamping ring 66 is sleeved between the outer side above the cooling sleeve 63 and the outer side of a spindle cover 65 above the spindle box 61, a gap is formed in the clamping ring 66, an adjusting bolt 67 for adjusting the looseness of the clamping ring 66 is arranged between the gap and the clamping ring, a sealing groove 68 opposite to the inner side of the spindle box 61 is formed in the outer side of the cooling sleeve 63, and a sealing ring 69 which is attached and pressed to the spindle box 61 is sleeved in the sealing groove 68. The clamp ring 66 above the cooling jacket 63 is clamped at the joint with the spindle cover 65, and the seal ring 69 is arranged inside the spindle head 61, thereby having a good sealing function on the upper and lower sides of the cooling groove 64.

Obviously, the electric spindle body 62 is provided with a draw hole 72 at the center for the draw rod 71 to pass through, and the outer side of the lower end of the electric spindle body 62 is provided with a sealing cylinder 73 which is tightly pressed and fixed with the lower end of the cooling jacket 63 and a spacer ring 74 which is sleeved outside the sealing cylinder 73. The pull rod 71 is connected with the hydraulic chuck 8, and the sealing cylinder 73 and the isolating ring 74 maintain the sealing performance of the lower end of the cooling jacket 63 and simultaneously do not influence the rotation of the hydraulic chuck 8 along with the pull rod 71.

Preferably, the hydraulic chuck 8 includes a chuck body 81 and a jaw block 82 arranged symmetrically with respect to the center of the chuck body 81, the chuck body 81 is connected to the jaw block 82 through a jaw foot 83, a gap is left between the chuck body 81 and the jaw block 82, and a fixing groove 84 and a fixing strip 85 are arranged on the opposite side of the jaw foot 83 and the jaw block 82, wherein the fixing groove 84 and the fixing strip 85 are inserted into each other and are arranged crosswise. The clamping jaw block 82 is kept separated from the chuck body 81, so that when a bar is clamped, the central axis of the bar is favorably kept to be matched with the center of the chuck body 81, and the fixing groove 84 and the fixing strip 85 prevent the clamping jaw block 82 from being dislocated and loosened after the clamping jaw block 82 is connected with the clamping jaw foot 83.

In summary, the principle of the present embodiment is: the electric spindle assembly 6 moves transversely or vertically relative to the vertical lathe 1 under the action of the transverse moving mechanism 3 and the vertical moving mechanism 4, and is matched with the hydraulic chuck 8 driven by the rotary hydraulic cylinder 7 to automatically clamp and transfer a workpiece, and the electric spindle assembly 6 provides cutting force required by workpiece processing, so that the workpiece processing efficiency is improved.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Although the vertical lathe 1, the slide base body 2, the lateral movement mechanism 3, the lateral slide rail 31, the lateral slide block 32, the lateral limit groove 33, the lateral limit projection 34, the shim plate 35, the lateral drive mechanism 36, the vertical movement mechanism 4, the vertical slide rail 41, the vertical slide block 42, the vertical limit groove 43, the vertical limit projection 44, the slide rail pressing block 45, the flange bracket 46, the slide table body 5, the side cover plate 51, the positive baffle plate 52, the upper baffle plate 53, the chip blocking cover 54, the top cover plate 55, the oil pipe bracket 56, the guide hole 57, the grease distributor 58, the electric spindle assembly 6, the spindle head 61, the electric spindle body 62, the cooling jacket 63, the cooling groove 64, the spindle cover 65, the clamp ring 66, the adjusting bolt 67, the seal groove 68, the seal ring 69, the rotary hydraulic cylinder 7, the pull rod 71, the pull hole 72, the seal cylinder 73, the packing ring 74, the hydraulic chuck 8, the chuck body 81, the clamp jaw block 82, the slide block 32, the slide table 5, the slide table 4, the slide block 4, the slide block 4, the slide block 6, the slide block 6, the slide block, the, The terms jaw foot 83, fixing groove 84, fixing bar 85, vertical driving mechanism 9, servo motor 91, coupler 92, driving screw 93, screw seat 94, screw nut 95, etc., but do not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a vertical lathe fixture, is including installing slip pedestal (2) on vertical lathe (1), its characterized in that, slip pedestal (2) and vertical lathe (1) between be provided with drive slip pedestal (2) relative vertical lathe (1) lateral shifting's lateral shifting mechanism (3), slip pedestal (2) install slip stage body (5) of slip pedestal (2) oscilaltion relatively through vertical moving mechanism (4), slip stage body (5) on install electric main shaft subassembly (6), electric main shaft subassembly (6) top be fixed with rotary hydraulic cylinder (7), rotary hydraulic cylinder (7) pass through pull rod (71) and be connected with hydraulic chuck (8) of installing at electric main shaft subassembly (6) lower extreme.

2. The vertical lathe clamping mechanism according to claim 1, wherein the transverse moving mechanism (3) comprises two parallel transverse sliding rails (31) extending along the transverse direction of the vertical lathe (1), a plurality of transverse sliding blocks (32) which are clamped with the transverse sliding rails (31) are fixed on one side of the sliding seat body (2) opposite to the transverse sliding rails (31), the upper part and the lower part of the transverse sliding rail (31) are respectively provided with a transverse limiting groove (33), the transverse sliding block (32) is provided with a transverse limiting bulge (34) clamped with the transverse limiting groove (33), a backing plate (35) is arranged between the transverse sliding block (32) and the sliding seat body (2), one end of the vertical lathe (1) is provided with a transverse driving mechanism (36), the transverse driving mechanism (36) adopts gear and rack transmission, lead screw transmission or hydraulic/pneumatic transmission.

3. The vertical lathe clamping mechanism according to claim 2, wherein the vertical moving mechanism (4) comprises two parallel vertical slide rails (41) extending in the vertical direction of the slide table body (5), a plurality of vertical sliding blocks (42) which are clamped with the vertical sliding rails (41) are fixed on one side of the sliding seat body (2) opposite to the vertical sliding rails (41), two sides of the vertical slide rail (41) are respectively provided with a vertical limiting groove (43), the vertical slide block (42) is provided with a vertical limiting bulge (44) clamped with the vertical limiting groove (43), a plurality of slide rail pressing blocks (45) are arranged between the vertical slide rail (41) and the sliding table body (5), the sliding seat body (2) is provided with a flange bracket (46) above, and a vertical driving mechanism (9) is arranged between the flange bracket (46) and the sliding table body (5).

4. The vertical lathe clamping mechanism as claimed in claim 3, wherein the vertical driving mechanism (9) comprises a servo motor (91) installed above the flange bracket (46), the output end of the servo motor (91) faces downwards and is connected with a driving lead screw (93) through a coupler (92), a lead screw base body (94) is installed on the sliding table body (5), a lead screw nut (95) is installed in the center of the lead screw base body (94), and the lead screw nut (95) is connected with the driving lead screw (93).

5. The vertical lathe clamping mechanism according to claim 1, wherein a side cover plate (51) is mounted at the lower end of the sliding table body (5), the side cover plate (51) is arranged between the electric spindle assembly (6) and the hydraulic chuck (8), a positive baffle (52) is fixed on one side of the lower portion of the side cover plate (51) opposite to the sliding table body (5) while an upper baffle (53) is fixed on the other side of the lower portion of the side cover plate, a scrap blocking cover (54) opposite to the side face of the hydraulic chuck (8) is fixed on the lower portion of the side cover plate (51), and a top cover plate (55) for blocking the side face of the electric spindle assembly (6) is fixed on the upper portion of the side cover plate (51).

6. The vertical lathe clamping mechanism according to claim 1, wherein an oil pipe support (56) is fixed on the sliding table body (5), a plurality of guide holes (57) for oil supply pipes to pass through are formed in the oil pipe support (56), and grease distributors (58) are respectively installed on two sides of the sliding table body (2).

7. The vertical lathe clamping mechanism as claimed in claim 1, wherein the electric spindle assembly (6) comprises a spindle box (61) mounted on the sliding table body (5), an electric spindle main body (62) is mounted at the center of the spindle box (61) along the vertical direction, a cooling jacket (63) is sleeved outside the electric spindle main body (62), and a cooling groove (64) which is annularly coiled is formed outside the cooling jacket (63).

8. The vertical lathe clamping mechanism according to claim 7, wherein a clamping ring (66) is sleeved between the outer side above the cooling sleeve (63) and the outer side of the spindle cover (65) above the spindle box (61), a gap is formed in the clamping ring (66), an adjusting bolt (67) for adjusting the looseness of the clamping ring (66) is arranged between the gap and the clamping ring, a sealing groove (68) opposite to the inner side of the spindle box (61) is formed in the outer side of the cooling sleeve (63), and a sealing ring (69) which is attached and pressed against the spindle box (61) is sleeved in the sealing groove (68).

9. The vertical lathe clamping mechanism according to claim 7, wherein a pull hole (72) for a pull rod (71) to pass through is formed in the center of the electric spindle body (62), and a sealing cylinder (73) which is tightly pressed and fixed with the lower end of the cooling sleeve (63) and a separation ring (74) which is sleeved on the outer side of the sealing cylinder (73) are arranged on the outer side of the lower end of the electric spindle body (62).

10. The vertical lathe clamping mechanism according to claim 1, wherein the hydraulic chuck (8) comprises a chuck body (81) and jaw blocks (82) which are arranged symmetrically relative to the center of the chuck body (81), the chuck body (81) is connected with the jaw blocks (82) through jaw feet (83), a gap is reserved between the chuck body (81) and the jaw blocks (82), and fixing grooves (84) and fixing strips (85) which are inserted into each other and are arranged in a crossed mode are arranged on the opposite sides of the jaw feet (83) and the jaw blocks (82).