CN211866788U

CN211866788U - Overlength gear shaft integral key shaft processing frock

Info

Publication number: CN211866788U
Application number: CN202020310201.2U
Authority: CN
Inventors: 樊伟; 路毅; 路建
Original assignee: Laiwu Taishan Coal Mine Machinery Co ltd
Current assignee: Laiwu Taishan Coal Mine Machinery Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-11-06
Anticipated expiration: 2030-03-13

Abstract

The utility model relates to an overlength gear shaft integral key shaft processing frock belongs to the technical field of gear hobbing machine, it includes the lower positioning mechanism of fixed connection on the three-jaw chuck, positioning mechanism and gear shaft one end fixed connection down, lower positioning mechanism includes cylindrical base, the base diameter is less than the gear shaft diameter, threaded connection has many first threaded rods on the base, a plurality of screw holes have been seted up at the gear shaft both ends, when first threaded rod corresponds with the epaxial screw hole of gear on the base, first threaded rod screw in threaded hole, terminal surface fixedly connected with supporting seat under the base, be provided with drive threaded rod pivoted drive assembly on the supporting seat, terminal surface fixedly connected with support column under the base, the support column is fixed connect with the three-jaw chuck on. The utility model discloses have and press from both sides tightly with lower positioning mechanism with three-jaw chuck, positioning mechanism up end installation gear shaft under, be close to down positioning mechanism one end from the gear shaft and begin to process, be convenient for carry out the effect that the spline was processed to overlength gear shaft.

Description

Overlength gear shaft integral key shaft processing frock

Technical Field

The utility model belongs to the technical field of the technique of gear hobbing machine and specifically relates to a overlength gear shaft integral key shaft processing frock is related to.

Background

At present, a gear hobbing machine is the most widely applied machine tool in gear processing machines, and straight teeth and helical cylindrical gears, worm gears, chain wheels and the like can be machined on the gear hobbing machine. A gear processing machine for processing straight teeth, helical teeth, herringbone cylindrical gears and worm gears by a hob according to a generating method. When the machine tool uses a special hob, various workpieces with special tooth shapes such as a spline, a chain wheel and the like can be machined.

The current china that bulletin number is CN206952303U uses novel specially to do benefit to 2018 and 2 months 2 days and discloses a gear hobbing machine, including the workstation, mutual sliding connection has the knife rest that has the gear hobbing cutter towards vertical sliding connection in back stand one side on front stand and the back stand on the workstation, the last rotation of workstation is connected with rotary platform, rotary platform is located between front stand and the back stand, the rotary platform up end is provided with the three-jaw chuck along with rotary platform synchronous revolution, is provided with the nail needle on the back stand. The gear shaft to be machined is fixed on the rotary platform through the three-jaw chuck, the axis of the gear shaft is perpendicular to the ground, the upper end of the gear shaft is abutted tightly through the nail needles, the rotary platform drives the gear shaft to rotate, the hobbing cutter starts machining from the upper end of the gear shaft, and the cutter rest drives the hobbing cutter to slide downwards until the gear shaft is machined.

The above prior art solutions have the following drawbacks: when the gear shaft is subjected to spline machining, the gear shaft is required to be machined from the upper end of the gear shaft, when the axial length of the gear shaft to be machined is too long, the hobbing cutter cannot be lifted to the upper end of the gear shaft due to the limited lifting height of the cutter rest, and the gear shaft cannot be machined conveniently.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing an overlength gear shaft integral key shaft processing frock. And a lower positioning mechanism is arranged at one end of the gear shaft, the lower positioning mechanism is clamped by a three-jaw chuck, and the processing is started from one end of the gear shaft close to the lower positioning mechanism, so that the spline processing is conveniently carried out on the overlong gear shaft.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a processing tool for a spline shaft of an ultra-long gear shaft comprises a lower positioning mechanism fixedly connected on a three-jaw chuck, the lower positioning mechanism is fixedly connected with one end of the gear shaft and comprises a cylindrical base, the diameter of the base is smaller than that of the gear shaft, a plurality of first threaded rods are connected to the base in a threaded manner, a plurality of threaded holes are formed in two ends of the gear shaft, when the first threaded rod on the base corresponds to the threaded hole on the gear shaft, the first threaded rod is screwed into the threaded hole, the lower end face of the base is fixedly connected with a supporting seat, a driving component for driving the threaded rod to rotate is arranged on the supporting seat, the terminal surface fixedly connected with support column under the base, on the support column fixed joint and the three-jaw chuck, be provided with on the gear hobbing machine and be used for fixing a position the last positioning mechanism of gear shaft upper end, it contradicts in the gear shaft lateral wall to go up positioning mechanism.

Through adopting above-mentioned technical scheme, pass through the fixed back of three-jaw chuck with the support column, place the gear shaft at the base up end, first threaded rod aligns on gear shaft screw hole and the base, drive assembly drive first threaded rod rotates in the screw in threaded hole, go up positioning mechanism and carry out the centre gripping to the gear shaft upper end, the gear hobbing machine begins to process the gear shaft from the gear shaft lower extreme, after processing to the take the altitude, the gear shaft upset, from the downward processing of gear shaft spline department, thereby the realization is to overlength gear shaft processing, utilize this location frock to be convenient for to carry out spline processing to overlength gear shaft.

The present invention may be further configured in a preferred embodiment as: the first threaded rod is arranged along the circumferential direction of the axis of the base, and the threaded hole is formed along the circumferential direction of the axis of the gear shaft.

Through adopting above-mentioned technical scheme, first threaded rod sets up along the axial and can increase the stability of being connected of gear shaft and base.

The present invention may be further configured in a preferred embodiment as: the supporting seat comprises a first supporting plate which is vertically and fixedly connected to the upper end face of the base, the first supporting plate deviates from a second supporting plate fixedly connected to one side of the base, the driving assembly comprises a square first connecting rod which is axially and slidably connected to the first threaded rod, the second supporting plate is rotatably connected with a first driving gear towards one side of the base, the first connecting rod is fixedly connected with the first driving gear in a coaxial mode, the supporting column is connected with a second driving gear in a coaxial rotating mode, and the first driving gear is meshed with the second driving gear.

Through adopting above-mentioned technical scheme, the second drive gear rotates and will drive a plurality of first drive gears of while and rotate, and the head rod rotates under first drive gear drives, and the head rod rotates and drives first threaded rod and rotate, and first threaded rod slides and screw in gear shaft threaded hole, accomplishes being connected between gear shaft lower extreme and the base, and easy operation is convenient.

The present invention may be further configured in a preferred embodiment as: first spout has been seted up towards second backup pad one end axial to first threaded rod, first spout is square spout, head rod sliding connection is in first spout, the head rod deviates from the coaxial fixed connection of first threaded rod one end on first drive gear.

Through adopting above-mentioned technical scheme, head rod sliding connection is in first spout, and when first threaded rod screw in screwed hole slided to the top, the head rod still can drive first threaded rod and rotate easy operation convenience.

The present invention may be further configured in a preferred embodiment as: second drive gear is towards the first bevel gear of the coaxial fixedly connected with in base one side, it is connected with second bevel gear to rotate on the first backup pad, second bevel gear and the meshing of first bevel gear, the radial fixedly connected with bracing piece of support column lateral wall, bracing piece one end is contradicted in second bevel gear, coaxial fixedly connected with dwang on the second bevel gear, the dwang deviates from support column one end and passes first backup pad fixedly connected with handle.

Through adopting above-mentioned technical scheme, rotate the handle and drive the dwang and rotate, the dwang drives second bevel gear and rotates, and first bevel gear of second bevel gear drive rotates, and first bevel gear drives second drive gear and rotates to realize driving first threaded rod and rotate, easy operation is laborsaving.

The present invention may be further configured in a preferred embodiment as: the bracing piece is contradicted and has been seted up first recess in second bevel gear one end, dwang lateral wall fixedly connected with latch segment, the keyway has been seted up on the second bevel gear, latch segment sliding connection is in the keyway, first threaded rod one end is contradicted when gear shaft screw hole diapire, the latch segment slides into in the first recess along with dwang one end.

Through adopting above-mentioned technical scheme, when first threaded rod one end is contradicted in gear shaft screw hole diapire, the latch segment is along with dwang one end slide in first recess with drive assembly locking, thereby prevent that drive assembly from rotating in the gear shaft course of working and influencing processing.

The present invention may be further configured in a preferred embodiment as: go up positioning mechanism and include two first dead levers of fixed connection in front column up end and rear column up end, first dead lever up end has two second dead levers along gear hobbing machine main shaft sliding connection, second dead lever up end has two third dead levers along gear hobbing machine main shaft axial sliding connection, second dead lever and third dead lever contradict in the gear shaft lateral wall.

Through adopting above-mentioned technical scheme, second dead lever and third dead lever contradict in the gear shaft lateral wall to carry on spacingly with the gear shaft upper end, prevent that the skew takes place for gear shaft upper end at rotatory in-process.

The present invention may be further configured in a preferred embodiment as: the first fixing rod is provided with a second sliding groove along the length direction, the two ends of the second sliding groove are not completely opened, a first sliding block is connected in the second sliding groove in a sliding mode, a second groove is formed in the upper end face of the first sliding block, a first through hole is formed in the upper end face of the first fixing rod, a second connecting rod is fixedly connected to the lower end face of the second fixing rod, a first connecting block is fixedly connected to the lower end face of the second connecting rod, the first connecting block penetrates through the first through hole to be inserted into the second groove, the two ends of the first fixing rod are in threaded connection with a second threaded rod, and one end of the second threaded rod is rotatably connected to one side of the first sliding block.

Through adopting above-mentioned technical scheme, fix the second dead lever at first dead lever up end through first connecting block and first sliding block, the drive of second threaded rod makes the convenient adjusting position of second dead lever to the gear shaft of adaptation different diameters.

The present invention may be further configured in a preferred embodiment as: the second fixing rod is provided with a third sliding groove along the length direction, two ends of the third sliding groove are not completely opened, a second sliding block is connected in the third sliding groove in a sliding mode, a third groove is formed in the upper end face of the second sliding block, a second through hole is formed in the upper end face of the second fixing rod, a third connecting rod is connected under the third fixing rod in a sliding mode, a second connecting block is fixedly connected under the third connecting rod in an end face mode, the second connecting block penetrates through the second through hole to be inserted into the third groove in an inserted mode, a third threaded rod is connected to two ends of the second fixing rod in a threaded mode, and one end of the third threaded rod is rotatably connected to one side of the second sliding.

Through adopting above-mentioned technical scheme, fix the third dead lever at second dead lever up end through second connecting block and second sliding block, the drive of third threaded rod makes the convenient adjusting position of third dead lever to the gear shaft of different diameters adapts to.

To sum up, the utility model discloses a following at least one useful technological effect:

1. after a support column is fixed through a three-jaw chuck, a gear shaft is placed on the upper end face of a base, a threaded hole of the gear shaft is aligned with a first threaded rod on the base, a driving assembly drives the first threaded rod to rotate and screw into the threaded hole, an upper positioning mechanism clamps the upper end of the gear shaft, a hobbing machine starts to process the gear shaft from the lower end of the gear shaft, after the gear shaft is processed to a certain height, the gear shaft is turned over and is processed downwards from a spline of the gear shaft, and therefore the processing of an overlong gear shaft is achieved, and the positioning tool is convenient for spline processing of the overlong gear;

2. the rotating handle drives the rotating rod to rotate, the rotating rod drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, and the first bevel gear drives the second driving gear to rotate, so that the first threaded rod is driven to rotate, and the operation is simple and labor-saving;

3. the second fixing rod is fixed on the upper end face of the first fixing rod through the first connecting block and the first sliding block, and the second fixing rod is driven by the second threaded rod to be convenient to adjust the position, so that the gear shaft with different diameters is adapted.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a partial cross-sectional view of the upper positioning mechanism of FIG. 1;

FIG. 3 is a cross-sectional view of the lower positioning mechanism of FIG. 1;

fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Reference numerals: 100. a lower positioning mechanism; 110. a base; 120. a supporting seat; 121. a first support plate; 122. a second support plate; 130. a support pillar; 140. a first threaded rod; 150. a drive assembly; 151. a first connecting rod; 152 a first drive gear; 153. a second drive gear; 154. a first bevel gear; 155. a second bevel gear; 156. a handle; 157. rotating the rod; 160. a first chute; 200. an upper positioning mechanism; 210. a first fixing lever; 211. a second chute; 212 a first sliding block; 213. a second groove; 214. a first through hole; 215. a second threaded rod; 220. a second fixing bar; 221. a second connecting rod; 222. a first connection block; 223. a third groove; 224. a second through hole; 225. a third threaded rod; 226. a second sliding block; 227. a third chute; 230. a third fixing bar; 231. a third connecting rod; 232. a second connecting block; 310. a threaded hole; 320. a support bar; 330. a first groove; 340. a locking block; 350. a keyway.

Detailed Description

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

Referring to fig. 1, for the utility model discloses an overlength gear shaft integral key shaft processing frock, including lower positioning mechanism 100 of fixed connection on the three-jaw chuck, lower positioning mechanism 100 and gear shaft one end fixed connection are provided with positioning mechanism 200 on the gear hobbing machine, and last positioning mechanism 200 contradicts in the gear shaft lateral wall.

Referring to fig. 1, lower positioning mechanism 100 includes cylindrical base 110, the diameter of base 110 is less than the gear shaft diameter, terminal surface fixedly connected with supporting seat 120 under base 110, supporting seat 120 includes vertical fixed connection in base 110 first backup pad 121 of terminal surface down, first backup pad 121 deviates from base 110 one side fixedly connected with second backup pad 122, terminal surface fixedly connected with support column 130 under base 110, second backup pad 122 is passed to support column 130 one end, threaded connection has three first threaded rods 140 on base 110, three first threaded rods 140 set up along base 110 axle center circumference, first threaded rod 140 one end is provided with drive assembly 150.

Referring to fig. 1, three threaded holes 310 are formed in both ends of the gear shaft along the circumferential direction of the axis of the gear shaft, and when one end of the gear shaft abuts against the base 110, the first threaded rod 140 is screwed into the threaded hole 310 to fixedly connect one end of the gear shaft to the upper end surface of the base 110. The support column 130 is fixed to the gear hobbing machine rotary platform by a three-jaw chuck.

Referring to fig. 2, the upper positioning mechanism 200 includes two first fixing rods 210 fixedly connected to the upper end surfaces of the front and rear pillars, a second fixing rod 220 slidably connected to the upper end surface of the first fixing rod 210 along the length direction of the first fixing rod 210, two third fixing rods 230 slidably connected to the upper end surface of the second fixing rod 220 along the length direction of the second fixing rod 220, the second fixing rod 220 is perpendicular to the third fixing rods 230, and both the second fixing rod 220 and the third fixing rods 230 are abutted against the gear shaft.

Referring to fig. 2, a second sliding groove 211 is formed in the first fixing rod 210 along the length direction, two ends of the second sliding groove 211 are not completely opened, a first sliding block 212 is slidably connected to the second sliding groove 211, a second groove 213 is formed in the upper end surface of the first sliding block 212, a first through hole 214 (see fig. 1) is formed in the upper end surface of the first fixing rod 210, a second connecting rod 221 is fixedly connected to the lower end surface of the second fixing rod 220, a first connecting block 222 is fixedly connected to the lower end surface of the second connecting rod 221, the first connecting block 222 penetrates through the first through hole 214 and is inserted into the second groove 213, second threaded rods 215 are threadedly connected to two ends of the first fixing rod 210, and one end of each second threaded rod 215 is rotatably connected to one side of.

Referring to fig. 2, a third sliding groove 227 is formed in the second fixing rod 220 along the length direction, two ends of the third sliding groove 227 are not completely opened, a second sliding block 226 is slidably connected to the third sliding groove 227, a third groove 223 is formed in the upper end face of the second sliding block 226, a second through hole 224 is formed in the upper end face of the second fixing rod 220, a third connecting rod 231 is slidably connected to the lower end face of the third fixing rod 230, a second connecting block 232 is fixedly connected to the lower end face of the third connecting rod 231, the second connecting block 232 penetrates through the second through hole 224 to be inserted into the third groove 223, third threaded rods 225 are threadedly connected to two ends of the second fixing rod 220, and one end of each third threaded rod 225 is rotatably connected to one side of the.

Referring to fig. 3, the driving assembly 150 includes a first connecting rod 151 axially slidably connected to the first threaded rod 140, a first driving gear 152 is rotatably connected to the second supporting plate 122 toward the base 110, the first connecting rod 151 is coaxially and fixedly connected to the first driving gear 152, a second driving gear 153 is coaxially and rotatably connected to the supporting column 130, the first driving gear 152 is engaged with the second driving gear 153, a first bevel gear 154 is coaxially and fixedly connected to the second driving gear 153 toward the base 110, a second bevel gear 155 is rotatably connected to the first supporting plate 121, and the second bevel gear 155 is engaged with the first bevel gear 154.

Referring to fig. 3, a first sliding groove 160 is axially formed at one end of the first threaded rod 140 facing the second support plate 122, the first sliding groove 160 is a square sliding groove, the first connecting rod 151 is slidably connected in the first sliding groove 160, and one end of the first connecting rod 151 departing from the first threaded rod 140 is coaxially and fixedly connected to the first driving gear 152.

Referring to fig. 3, a support rod 320 is fixedly connected to the side wall of the support column 130 in the radial direction, one end of the support rod 320 abuts against the second bevel gear 155, a rotating rod 157 is fixedly connected to the second bevel gear 155 in a coaxial manner, and one end of the rotating rod 157, which deviates from the support column 130, penetrates through the first support plate 121 and is fixedly connected with the handle 156.

Referring to fig. 4, the supporting rod 320 is abutted against one end of the second bevel gear 155 to form a first groove 330, the side wall of the rotating rod 157 is fixedly connected with the locking block 340, the second bevel gear 155 is provided with a key groove 350, the locking block 340 is slidably connected in the key groove 350, when one end of the first threaded rod 140 is abutted against the bottom wall of the threaded hole 310 of the gear shaft, the locking block 340 is slid into the first groove 330 along with one end of the rotating rod 157 to lock the driving assembly 150, so that the driving assembly 150 is prevented from rotating in the process of processing the gear shaft to.

The implementation manner of the embodiment is as follows: after the support post 130 is secured by the three-jaw chuck, the gear shaft is placed on the upper end surface of the base 110, and the threaded hole 310 is aligned with the first threaded rod 140. When the handle 156 is rotated, the handle 156 drives the rotating rod 157 and the second bevel gear 155 to rotate, the second bevel gear 155 drives the first bevel gear 154 to rotate, so as to drive the second driving gear 153 to rotate, the second driving gear 153 drives the first driving gear 152 and the connecting rod, the connecting rod drives the first threaded rod 140 to rotate, and the first threaded rod 140 ascends and screws into the threaded hole 310.

When the first threaded rod 140 abuts against the bottom wall of the threaded hole 310, the rotating rod 157 is pushed, so that the locking block 340 is inserted into the first groove 330 along with one end of the rotating rod 157, thereby locking the driving assembly 150.

The second fixing rod 220 is firstly installed on the upper end surface of the first fixing rod 210, the first connecting block 222 is inserted into the second groove 213, the second threaded rod 215 is rotated to enable the first sliding block 212 to drive the second fixing rod 220 to slide and abut against the gear shaft, and another second fixing rod 220 is installed according to the same operation.

And a third fixing rod 230 is installed, a second connecting block 232 is inserted into the third groove 223, and the third threaded rod 225 is rotated to enable the second sliding block 226 to drive the third fixing rod 230 to slide and abut against the gear shaft, so that another third fixing rod 230 is installed according to the same operation.

The hobbing machine starts to process from the lower end of the gear shaft, and when the hobbing cutter cannot continue to process upwards, the third fixing rod 230 and the second fixing rod 220 are removed. Turning the handle 156 causes the first threaded rod 140 to be unscrewed from the gear shaft threaded hole 310.

And (4) inverting the gear shaft, reinstalling the gear shaft according to the operation, and downward processing from the processed region of the gear shaft so as to finish spline processing of the gear shaft.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an overlength gear shaft integral key shaft processing frock which characterized in that: the device comprises a lower positioning mechanism (100) fixedly connected to a three-jaw chuck, wherein the lower positioning mechanism (100) is fixedly connected with one end of a gear shaft, the lower positioning mechanism (100) comprises a cylindrical base (110), the diameter of the base (110) is smaller than that of the gear shaft, a plurality of first threaded rods (140) are in threaded connection with the base (110), a plurality of threaded holes (310) are formed in two ends of the gear shaft, when the first threaded rods (140) on the base (110) correspond to the threaded holes (310) on the gear shaft, the first threaded rods (140) are screwed into the threaded holes (310), a supporting seat (120) is fixedly connected to the lower end face of the base (110), a driving component (150) for driving the threaded rods to rotate is arranged on the supporting seat (120), a supporting column (130) is fixedly connected to the lower end face of the base (110), and the supporting column (130), be provided with on the gear hobbing machine and be used for fixing a position last positioning mechanism (200) of gear shaft upper end, go up positioning mechanism (200) and contradict in the gear shaft lateral wall.

2. The overlong gear shaft spline shaft machining tool according to claim 1, characterized in that: the first threaded rod (140) is arranged along the axial center circumference of the base (110), and the threaded hole (310) is formed along the axial center circumference of the gear shaft.

3. The overlong gear shaft spline shaft machining tool according to claim 2, characterized in that: supporting seat (120) include first backup pad (121) of vertical fixed connection in base (110) up end, first backup pad (121) deviate from base (110) one side fixedly connected with second backup pad (122), drive assembly (150) include square head rod (151) of axial sliding connection on first threaded rod (140), second backup pad (122) are rotated towards base (110) one side and are connected with first drive gear (152), head rod (151) and the coaxial fixed connection of first drive gear (152), coaxial rotation is connected with second drive gear (153) on support column (130), first drive gear (152) and second drive gear (153) meshing.

4. The overlong gear shaft spline shaft machining tool according to claim 3, characterized in that: first spout (160) have been seted up towards second backup pad (122) one end axial to first threaded rod (140), first spout (160) are square spout, first connecting rod (151) sliding connection is in first spout (160), first connecting rod (151) deviate from first threaded rod (140) one end coaxial fixed connection on first drive gear (152).

5. The tool for machining the spline shaft of the overlong gear shaft according to claim 4, wherein the tool comprises: second drive gear (153) are towards first bevel gear (154) of the coaxial fixedly connected with in base (110) one side, it is connected with second bevel gear (155) to rotate on first backup pad (121), second bevel gear (155) and first bevel gear (154) meshing, radial fixedly connected with bracing piece (320) of support column (130) lateral wall, bracing piece (320) one end is contradicted in second bevel gear (155), coaxial fixedly connected with dwang (157) on second bevel gear (155), dwang (157) deviate from support column (130) one end and pass first backup pad (121) fixedly connected with handle (156).

6. The tool for machining the spline shaft of the overlong gear shaft according to claim 5, wherein the tool comprises: first recess (330) has been seted up in second bevel gear (155) one end in conflict bracing piece (320), dwang (157) lateral wall fixedly connected with latch segment (340), keyway (350) have been seted up on second bevel gear (155), latch segment (340) sliding connection is in keyway (350), when first threaded rod (140) one end is contradicted in gear shaft screw hole (310) diapire, latch segment (340) are along with dwang (157) one end and slide in first recess (330).

7. The overlong gear shaft spline shaft machining tool according to claim 6, characterized in that: go up positioning mechanism (200) including two first dead levers (210) of fixed connection in front column up end and rear column up end, first dead lever (210) up end has two second dead levers (220) along gear hobbing machine main shaft sliding connection, second dead lever (220) up end has two third dead levers (230) along gear hobbing machine main shaft axial sliding connection, second dead lever (220) and third dead lever (230) contradict in the gear shaft lateral wall.

8. The tooling for machining the spline shaft of the overlong gear shaft according to claim 7, is characterized in that: the first fixing rod (210) is provided with a second sliding groove (211) along the length direction, the two ends of the second sliding groove (211) are not completely opened, a first sliding block (212) is connected in the second sliding groove (211) in a sliding mode, a second groove (213) is formed in the upper end face of the first sliding block (212), a first through hole (214) is formed in the upper end face of the first fixing rod (210), a second connecting rod (221) is fixedly connected to the lower end face of the second fixing rod (220), a first connecting block (222) is fixedly connected to the lower end face of the second connecting rod (221), the first connecting block (222) penetrates through the first through hole (214) and is inserted into the second groove (213), the two ends of the first fixing rod (210) are connected with a second threaded rod (215) in a threaded mode, and one end of the second threaded rod (215) is rotatably connected to one side of the first sliding block (212).

9. The overlong gear shaft spline shaft machining tool according to claim 8, characterized in that: third spout (227) have been seted up along length direction to second dead lever (220), third spout (227) both ends are not opened completely, sliding connection has second sliding block (226) in third spout (227), third recess (223) have been seted up to second sliding block (226) up end, second through-hole (224) have been seted up to second dead lever (220) up end, end sliding connection has third connecting rod (231) under third dead lever (230), end fixed connection has second connecting block (232) under third connecting rod (231), second connecting block (232) pass second through-hole (224) and peg graft in third recess (223), second dead lever (220) both ends threaded connection has third threaded rod (225), third threaded rod (225) one end is rotated and is connected in second sliding block (226) one side.