CN114538562A

CN114538562A - Slaughterhouse greasy dirt splitter

Info

Publication number: CN114538562A
Application number: CN202210245073.1A
Authority: CN
Inventors: 赵炳昌; 王恩云
Original assignee: Zhucheng Haoze Machinery Co ltd
Current assignee: Zhucheng Haoze Machinery Co ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-05-27
Anticipated expiration: 2042-03-14
Also published as: CN114538562B

Abstract

The invention discloses oil stain separation equipment for a slaughterhouse, which relates to the technical field of separation and comprises a sewage tank, wherein a support frame is fixed on the sewage tank, a sliding frame is slidably mounted on a cross rod, a deflection sleeve block is rotatably mounted on the sliding frame, a scraper is mounted on the deflection sleeve block through an elastic connecting assembly, a lifting sleeve block is slidably mounted on a rotating shaft, a connecting frame is hinged between the lifting sleeve block and the sliding frame, a reversing column I and a reversing column II which correspond to the deflection sleeve block are mounted on the sliding frame, and a locking mechanism for positioning the deflection sleeve block is mounted on the sliding frame; when the scraper blade scrapes oil stains and moves towards the lateral channel, the floating oil stains are scraped into the oil collecting cylinder by the scraper blade, and before the scraper blade moves away from the lateral channel, the deflection sleeve block is pushed by the reversing column I to deflect, so that the scraper blade is not contacted with the oil stains, the one-way oil scraping effect of the scraper blade is realized, and the separation operation efficiency of scraping the oil stains into the oil collecting cylinder is effectively improved.

Description

Slaughterhouse greasy dirt splitter

Technical Field

The invention relates to the technical field of separation, in particular to slaughterhouse oil stain separation equipment.

Background

Slaughterhouses, which are places for efficiently killing livestock on a large scale, are provided with a series of supporting facilities, the slaughtered animals are cleaned, processed, inspected and refrigerated for standby, and oil stains generated in the slaughterhouses need to be separated from oil stains floating on the surface of sewage by virtue of separation equipment, so that the subsequent more detailed treatment is facilitated.

Although the patent with application publication number CN 107792915 a discloses a V-shaped oil scraping plate applied to an oil stain separating device, which comprises a V-shaped oil storage tank, a top seat and a V-shaped oil scraping plate, wherein the V-shaped oil storage tank is fixedly connected to a mounting seat, the left end of the V-shaped oil storage tank is connected with an oil outlet pipe, the right end of the V-shaped oil storage tank is connected with an oil inlet pipe, the top seat is connected to the mounting seat through a stand column, the V-shaped oil storage tank is positioned under the top seat, the shape of the V-shaped oil scraping plate is matched with that of the V-shaped oil storage tank, the V-shaped oil scraping plate is connected with a translation mechanism, the translation mechanism is connected with an output shaft end of an air cylinder, and the air cylinder is installed on the top seat; although the device can scrape oil stains, the one-way moving oil scraping effect of the oil scraping plate cannot be realized, the oil stains can move towards the direction of the oil inlet pipe when the oil scraping plate moves in the reverse direction, the liquid level is easily disturbed, oil-water layering is not facilitated, and the oil stain separation efficiency is reduced; therefore, the oil stain separating equipment for the slaughterhouse is provided to solve the technical problems.

Disclosure of Invention

An oil stain separating device for a slaughterhouse comprises a sewage tank, a supporting frame is fixed on the sewage tank, an oil collecting cylinder is arranged in the center of the sewage tank, the upper end of the oil collecting cylinder is communicated with a vertical cylinder body, a pair of cross rods are installed on the side wall of the vertical cylinder body, a sliding frame is installed on the cross rods in a sliding mode, a deflection sleeve block is installed on the sliding frame in a rotating mode, a scraper is installed on the deflection sleeve block through an elastic connecting assembly, a lateral channel corresponding to the scraper is arranged on the side wall of the vertical cylinder, a rotating shaft is vertically arranged in the vertical cylinder, a lifting sleeve block is slidably arranged on the rotating shaft, a connecting frame I is hinged between the lifting sleeve block and the sliding frame, the support frame is provided with a driving mechanism for driving the lifting sleeve block to reciprocate, the sliding frame is provided with a reversing column I and a reversing column II which correspond to the deflection sleeve block, and the sliding frame is provided with a locking mechanism for positioning the deflection sleeve block.

As a modified scheme of the invention: the driving mechanism comprises a rotary table which is rotatably arranged on the supporting frame, a transmission rod is eccentrically hinged to the rotary table, and one end, far away from the rotary table, of the transmission rod is hinged to the lifting sleeve block.

As a modified scheme of the invention: a ring plate is fixed on the vertical cylinder, the rotating shaft penetrates through the ring plate, and a supporting spring is connected between the lifting sleeve block and the ring plate.

As a modified scheme of the invention: locking mechanical system including rotating the cam of installing on the carriage, the cam with cover piece fixed connection deflects, be fixed with spacing lagging on the carriage, slidable mounting has link II on the spacing lagging, it installs the gyro wheel to rotate on the link II, set up the spacing arc groove with the gyro wheel butt on the cam, be fixed with the spacing post on the carriage, spacing post and the rotatory correspondence of cover piece that deflects.

As a modified scheme of the invention: the elastic connecting assembly comprises a sliding rod fixed on the scraper, the sliding rod slides and extends into the deflection sleeve block, and a spring ring is connected between the deflection sleeve block and the scraper.

As a modified scheme of the invention: side baffles are arranged on two sides of the scraper.

As a modified scheme of the invention: the vertical cylinder is fixedly sleeved with a circular truncated cone sleeve block, the upper edge of the circular truncated cone sleeve block and the lower edge of the lateral channel are located on the same horizontal plane, and the scraper is arranged opposite to the circular truncated cone sleeve block.

As a modified scheme of the invention: the utility model discloses a sewage treatment device, including pivot outer wall, helical blade, oil collecting cylinder, oil drainage pipe, oil collecting cylinder, sewage tank, oil collecting cylinder, sewage tank, and the like.

As a modified scheme of the invention: and the lateral channel is provided with a screen plate.

As a modified scheme of the invention: the supporting frame is provided with a motor, an output shaft of the motor is in driving connection with a main gear, an auxiliary gear is in meshing connection with the main gear, the auxiliary gear is in coaxial connection with the turntable, a driving bevel gear is fixed on the auxiliary gear, and a driven bevel gear which is in coaxial connection with the rotating shaft is in meshing connection with the driving bevel gear.

Compared with the prior art, the invention has the beneficial effects that:

1. the sliding frame slides in a reciprocating mode relative to the cross rod, so that the scraping plates scrape oil stains floating on the liquid level in the sewage tank, the oil stains enter the oil collecting cylinder from the lateral channel to achieve a collecting effect, the oil stains need to cross the circular truncated cone sleeve block in the scraping process, water enters the oil collecting cylinder in the oil scraping process is effectively reduced, and the oil stain and water separation effect is greatly improved.

2. When the scraper blade scrapes oil stains and moves towards the lateral channel, the floating oil stains are scraped into the oil collecting cylinder by the scraper blade, and before the scraper blade moves away from the lateral channel, the deflection sleeve block is pushed by the reversing column I to deflect, so that the scraper blade is not contacted with the oil stains, the one-way oil scraping effect of the scraper blade is realized, and the separation operation efficiency of scraping the oil stains into the oil collecting cylinder is effectively improved.

3. The helical blade can rotate along with the rotation of the rotating shaft, so that oil stains in the oil collecting cylinder can be stirred in a rotating mode, and meanwhile, the heating rod heats the rotating shaft and the helical blade, the fluidity of the oil stains can be effectively improved, and the oil stains can be conveniently and smoothly discharged through the oil discharge pipe.

Drawings

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

FIG. 2 is a partial perspective view of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of another overall structure of the present invention;

FIG. 4 is a schematic view of a part of the structure of the scraper moving towards one side of the vertical cylinder in the invention;

FIG. 5 is a schematic view of the structure of portion B of FIG. 4 according to the present invention;

FIG. 6 is a schematic view of a portion of the scraper moving away from the vertical cylinder according to the present invention;

FIG. 7 is a partial schematic view of the present invention;

fig. 8 is a schematic view of the partial explosion structure of fig. 7 according to the present invention.

In the figure: 1-sewage tank, 2-cross bar, 3-support frame, 4-scraper, 5-oil collecting cylinder, 6-lateral channel, 7-round table sleeve block, 8-vertical cylinder, 9-connecting frame I, 10-rotary table, 11-heating rod, 12-main gear, 13-motor, 14-driven bevel gear, 15-rotating shaft, 16-driving bevel gear, 17-pinion, 18-sliding frame, 19-helical blade, 20-reversing column I, 21-lifting sleeve block, 22-transmission rod, 23-reversing column II, 24-side baffle, 25-spring ring, 26-cam, 27-connecting frame II, 28-limit sleeve plate, 29-pushing column, 30-pushing spring, 31-roller, 32-deflection sleeve block, 33-limit column, 34-limit arc groove, 35-slide bar, 36-support spring, 37-screen plate, 38-oil discharge pipe and 39-ring plate.

Detailed Description

The technical scheme of the patent is further described in detail by combining the following specific embodiments:

example 1

Referring to fig. 1-8, a slaughterhouse oil stain separation device comprises a sewage tank 1, oil-containing sewage of a slaughterhouse is stored in the sewage tank 1, a support frame 3 is fixed on the sewage tank 1, an oil collecting cylinder 5 is installed at the center of the sewage tank 1, a vertical cylinder 8 is installed at the upper end of the oil collecting cylinder 5 in a communicated manner, a pair of cross rods 2 are installed on the side walls of the vertical cylinder 8, a sliding frame 18 is installed on the cross rods 2 in a sliding manner, a deflection sleeve block 32 is installed on the sliding frame 18 in a rotating manner, a scraping plate 4 is installed on the deflection sleeve block 32 through an elastic connection assembly, a lateral channel 6 corresponding to the scraping plate 4 is formed in the side wall of the vertical cylinder 8, and the scraping plate 4 can scrape oil stains floating on the liquid level of the sewage tank 1 in the process that the relative cross rods 2 slide towards the vertical cylinder 8, so that the oil stains are scraped into the vertical cylinder 8 from the lateral channel 6.

A rotating shaft 15 is vertically arranged in the vertical cylinder 8, a lifting sleeve block 21 is slidably mounted on the rotating shaft 15, a connecting frame I9 is hinged between the lifting sleeve block 21 and the sliding frame 18, a driving mechanism for driving the lifting sleeve block 21 to reciprocate is arranged on the supporting frame 3, a reversing column I20 and a reversing column II23 corresponding to the deflection sleeve block 32 are mounted on the sliding frame 18, and a locking mechanism for positioning the deflection sleeve block 32 is mounted on the sliding frame 18.

Wherein, actuating mechanism includes the carousel 10 of rotation installation on support frame 3, and the eccentric articulated transfer line 22 that has on carousel 10, and the one end that the transfer line 22 kept away from carousel 10 articulates on lift sleeve block 21, is fixed with crown plate 39 on the vertical barrel 8, and pivot 15 runs through crown plate 39, is connected with supporting spring 36 between lift sleeve block 21 and the crown plate 39.

When the rotary table 10 rotates, the rotary table 10 drives the transmission rod 22 to swing, the transmission rod 22 drives the lifting sleeve block 21 to vertically and reciprocally slide relative to the rotary shaft 15 under the elastic supporting effect of the supporting spring 36, at the moment, the lifting sleeve block 21 drives the sliding frame 18 to reciprocally slide relative to the cross rod 2 through the connecting frame I9, the scraper 4 can linearly and reciprocally slide relative to the cross rod 2, when the scraper 4 slides towards one side of the vertical barrel 8, the scraper 4 scrapes floating oil stains on the sewage tank 1, the oil stains are scraped into the vertical barrel 8, and the oil stains are gathered into the oil collecting barrel 5 along the vertical barrel 8 to be collected.

Example 2

Referring to fig. 1-8, based on embodiment 1, in addition, the locking mechanism of the apparatus includes a cam 26 rotatably mounted on the sliding frame 18, the cam 26 is fixedly connected to the deflecting sleeve 32, a limiting sleeve 28 is fixed on the sliding frame 18, a connecting frame II27 is slidably mounted on the limiting sleeve 28, a roller 31 is rotatably mounted on the connecting frame II27, a limiting arc groove 34 abutted against the roller 31 is formed on the cam 26, a limiting column 33 is fixed on the sliding frame 18, the limiting column 33 rotatably corresponds to the deflecting sleeve 32, a pushing column 29 slidably connected to the limiting sleeve 28 is fixed on the connecting frame II27, and a pushing spring 30 is connected between the limiting sleeve 28 and the connecting frame II 27.

Through the arrangement, when the sliding frame 18 slides to the lateral channel 6, the scraper 4 is in a vertical state, at the moment, under the elastic pushing action of the supporting spring 36, the roller 31 is abutted against the limiting arc groove 34, the pushing limitation on the cam 26 is realized, and the scraper 4 is ensured to be stable when scraping oil stains floating on the sewage tank 1;

when the sliding frame 18 slides to the deflecting sleeve block 32 and is abutted against the reversing column I20, the reversing column I20 limits the deflecting sleeve block 32, the deflecting sleeve block 32 deflects to separate the limiting arc groove 34 from the roller 31, the roller 31 is abutted against the side wall of the cam 26, the arranged limiting column 33 supports and limits the deflecting sleeve block 32, the scraper 4 rotates to be positioned above the liquid level of the sewage tank 1, the scraper 4 is not contacted with oil stains on the sewage tank 1 when the sliding frame 18 slides away from the vertical cylinder 8, the reverse deflection resetting of the deflecting sleeve block 32 is realized when the deflecting sleeve block 32 moves to be abutted against the reversing column II23, the limiting arc groove 34 is abutted against the roller 31 again, the scraper 4 is reset and is in a vertical state, the operation is repeated, the oil stains on the sewage tank 1 are continuously scraped into the vertical cylinder 8 from the lateral channel 6, and the scraper 4 is not contacted with water bodies when moving away from the vertical oil stain cylinder 8, the disturbance effect on the liquid level is reduced, the stability of the oil stain scraping process is ensured, and the separation efficiency of the oil stain and water is effectively improved.

Further, the elastic connection assembly of the device comprises a slide rod 35 fixed on the scraper 4, the slide rod 35 slidably extends into the deflection sleeve block 32, a spring ring 25 is connected between the deflection sleeve block 32 and the scraper 4, side baffles 24 are mounted on two sides of the scraper 4, the side baffles 24 play a role in gathering oil stains, the scraping efficiency of the oil stains is improved, a circular truncated cone sleeve block 7 is fixedly sleeved on the vertical cylinder 8, the upper edge of the circular truncated cone sleeve block 7 and the lower edge of the lateral channel 6 are located on the same horizontal plane, and the scraper 4 and the circular truncated cone sleeve block 7 are arranged oppositely.

When oil scraping separation is carried out, the height of an oil layer floating on the sewage tank 1 is slightly lower than the height of the top surface of the circular truncated cone sleeve block 7, in the process that the sliding frame 18 slides towards the vertical barrel 8, the scraper 4 scrapes the greasy dirt layer on the sewage tank 1, the greasy dirt flows to the top surface of the circular truncated cone sleeve block 7 along the circular truncated cone sleeve block 7 and then enters the vertical barrel 8 through the lateral channel 6, during the period, the lower end of the scraper 4 is abutted against the side wall of the circular truncated cone sleeve block 7, the spring ring 25 is elastically deformed, the slide rod 35 can slide relative to the deflection sleeve block 32, make scraper blade 4 can be in the altitude variation of adaptation round platform cover piece 7 lateral wall, push vertical barrel 8 with the greasy dirt in, round platform cover piece 7 of setting plays the water barrier effect under the greasy dirt layer, reduces and is scraped the rivers fluctuation that the in-process arouses at the greasy dirt and cause the water to sneak into vertical barrel 8 inside, has effectively promoted greasy dirt separation effect.

And there is helical blade 19 at 15 outer wall fixed mounting of pivot, and helical blade 19 is in inside vertical barrel 8, and the inside setting of pivot 15 installs heating rod 11, and oil discharge pipe 38 is installed to the lateral wall under the oil collecting cylinder 5, and oil discharge pipe 38 extends to the sewage tank 1 outside, installs otter board 37 on the side direction passageway 6, and the otter board 37 of setting can be used for blockking the fixed impurity of large granule in the sewage, avoids causing the jam of vertical barrel 8 and oil discharge pipe 38.

Through the above setting, after the greasy dirt on sewage tank 1 entered into vertical barrel 8 and a collection oil section of thick bamboo 5, owing to set up heating rod 11 and heated countershaft 15 and helical blade 19, and helical blade 19 and 15 can heat the greasy dirt in the vertical barrel 8, avoid condensing of greasy dirt, promote the mobility of greasy dirt, make things convenient for the greasy dirt to discharge smoothly from oil drain pipe 38.

In addition, a motor 13 is installed on the supporting frame 3, a main gear 12 is connected to an output shaft of the motor 13 in a driving manner, a secondary gear 17 is connected to the main gear 12 in a meshing manner, the secondary gear 17 is coaxially connected with the rotating disc 10, a driving bevel gear 16 is fixed to the secondary gear 17, and a driven bevel gear 14 coaxially connected with a rotating shaft 15 is connected to the driving bevel gear 16 in a meshing manner.

Motor 13 drive master gear 12 is rotatory, master gear 12 drive pinion 17 is rotatory, pinion 17 drive carousel 10 rotates, realize the elevating movement of lift sleeve piece 21, and then realize the scraping action of scraper blade 4 to the greasy dirt, meanwhile, carousel 10 drive bevel gear 16 is rotatory, drive bevel gear 16 drive driven bevel gear 14 is rotatory, make pivot 15 rotate, and then realize that helical blade 19 is rotatory, realize carrying the greasy dirt in the vertical barrel 8 downwards and assemble inside oil collecting cylinder 5, realize the stirring to the greasy dirt, do benefit to being heated and promoting mobility of greasy dirt, connect the delivery pump through oil extraction pipe 38 and realize carrying the greasy dirt.

In conclusion, the sliding frame 18 slides in a reciprocating manner relative to the cross rod 2, so that the scraping plate 4 scrapes oil stains floating on the liquid level in the sewage tank 1, the oil stains enter the oil collecting cylinder 5 from the lateral channel 6 to achieve a collecting effect, and the oil stains need to cross the circular truncated cone sleeve block 7 in the scraping process, so that water enters the oil collecting cylinder 5 in the oil scraping process is effectively reduced, and the separation effect of the oil stains and water is greatly improved; when the scraper 4 moves towards the lateral channel 6 in the process of scraping the oil stain, the floating oil stain is scraped into the oil collecting cylinder 5 by the scraper 4, and before the scraper 4 moves away from the lateral channel 6, the deflection sleeve block 32 is pushed by the reversing column I20 to realize deflection, so that the scraper 4 is not contacted with the oil stain, the one-way oil scraping effect of the scraper 4 is realized, and the separation operation efficiency of scraping the oil stain into the oil collecting cylinder 5 is effectively improved; according to the oil-stain-removing device, the helical blade 19 can rotate along with the rotation of the rotating shaft 15, so that oil stains in the oil collecting cylinder 5 can be stirred in a rotating mode, meanwhile, the heating rod 11 heats the rotating shaft 15 and the helical blade 19, the liquidity of the oil stains can be effectively improved, and the oil stains can be conveniently and smoothly discharged through the oil discharge pipe 38.

In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only terms of relationships determined for convenience in describing structural relationships of the parts or elements of the present invention, and are not intended to refer to any parts or elements of the present invention, and are not to be construed as limiting the present invention.

It should be noted that, although the present specification describes embodiments, each embodiment does not include only a single technical solution, and such description of the specification is only for clarity, and those skilled in the art should take the specification as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art, and the above embodiments only express the preferred embodiments of the technical solutions, and the description thereof is more specific and detailed, but not construed as limiting the scope of the claims of the technical solutions. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these changes and substitutions belong to the protection scope of the present invention. The protection scope of this technical solution patent should be subject to the appended claims.

Claims

1. The slaughterhouse oil stain separation equipment comprises a sewage tank (1), wherein a support frame (3) is fixed on the sewage tank (1), an oil collecting barrel (5) is installed at the center of the sewage tank (1), and the slaughterhouse oil stain separation equipment is characterized in that the upper end of the oil collecting barrel (5) is communicated with and installed with a vertical barrel (8), a pair of cross rods (2) are installed on the side wall of the vertical barrel (8), a sliding frame (18) is installed on the cross rods (2) in a sliding manner, a deflection sleeve block (32) is installed on the sliding frame (18) in a rotating manner, a scraper (4) is installed on the deflection sleeve block (32) through an elastic connecting assembly, a lateral channel (6) corresponding to the scraper (4) is arranged on the side wall of the vertical barrel (8), a rotating shaft (15) is vertically arranged in the vertical barrel (8), a lifting sleeve block (21) is installed on the rotating shaft (15) in a sliding manner, and a connecting frame I (9) is hinged between the lifting sleeve block (21) and the sliding frame (18), be equipped with on support frame (3) and be used for driving the reciprocating drive mechanism who goes up and down of lift cover block (21), install on carriage (18) and deflect the switching-over post I (20) and the switching-over post II (23) that the cover block (32) correspond, install on carriage (18) and carry out the locking mechanical system who fixes a position to deflecting cover block (32).

2. Slaughterhouse oil separation equipment according to claim 1, characterized in that the drive mechanism comprises a rotary table (10) rotatably mounted on the support frame (3), a transmission rod (22) is eccentrically hinged on the rotary table (10), and one end of the transmission rod (22) away from the rotary table (10) is hinged on the lifting sleeve block (21).

3. Slaughterhouse oil separation equipment according to claim 1, characterized in that a ring plate (39) is fixed on the vertical cylinder (8), the rotating shaft (15) penetrates through the ring plate (39), and a support spring (36) is connected between the lifting sleeve block (21) and the ring plate (39).

4. The slaughterhouse oil stain separation equipment according to claim 1, wherein the locking mechanism comprises a cam (26) rotatably mounted on a sliding frame (18), the cam (26) is fixedly connected with the deflection sleeve block (32), a limiting sleeve plate (28) is fixed on the sliding frame (18), a connecting frame II (27) is slidably mounted on the limiting sleeve plate (28), a roller (31) is rotatably mounted on the connecting frame II (27), a limiting arc groove (34) abutted against the roller (31) is formed in the cam (26), a limiting column (33) is fixed on the sliding frame (18), and the limiting column (33) corresponds to the deflection sleeve block (32) in a rotating mode.

5. Slaughterhouse oil separation equipment according to claim 1, characterized in that the resilient connection assembly comprises a slide bar (35) fixed to the scraper (4), the slide bar (35) extending slidingly into the deflecting pocket (32), a spring ring (25) being connected between the deflecting pocket (32) and the scraper (4).

6. Slaughterhouse oil separation equipment according to any one of claims 1-5, characterized in that side dams (24) are installed on both sides of the scraper (4).

7. The slaughterhouse oil stain separation equipment according to claim 1, wherein a circular truncated cone sleeve block (7) is fixedly sleeved on the vertical cylinder (8), the upper edge of the circular truncated cone sleeve block (7) and the lower edge of the lateral channel (6) are positioned on the same horizontal plane, and the scraper (4) and the circular truncated cone sleeve block (7) are arranged oppositely.

8. The slaughterhouse oil stain separation equipment according to claim 1, wherein the outer wall of the rotating shaft (15) is fixedly provided with a helical blade (19), the helical blade (19) is positioned inside the vertical cylinder (8), the heating rod (11) is embedded and installed inside the rotating shaft (15), the lower side wall of the oil collecting cylinder (5) is provided with an oil discharge pipe (38), and the oil discharge pipe (38) extends to the outside of the sewage tank (1).

9. Slaughterhouse oil separation equipment according to claim 1, characterized in that a net plate (37) is mounted on the lateral channel (6).

10. The slaughterhouse oil stain separation equipment according to claim 2, wherein a motor (13) is mounted on the support frame (3), a main gear (12) is connected to an output shaft of the motor (13) in a driving manner, an auxiliary gear (17) is connected to the main gear (12) in a meshing manner, the auxiliary gear (17) is coaxially connected with the rotary table (10), a driving bevel gear (16) is fixed on the auxiliary gear (17), and a driven bevel gear (14) which is coaxially connected with the rotary shaft (15) is connected to the driving bevel gear (16) in a meshing manner.