CN106820581A

CN106820581A - A kind of class stump

Info

Publication number: CN106820581A
Application number: CN201710177944.XA
Authority: CN
Inventors: 杨涵
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-23
Filing date: 2017-03-23
Publication date: 2017-06-13

Abstract

The present invention relates to the technical field of education and instruction, more particularly to a kind of class stump, it can increase teaching method, and reduction uses limitation；Height requirement of the not enough faculty of height to this stump can be met simultaneously, adaptability is improved, and enhancing uses reliability；Including stage body, left front leg, left back leg, RAT and right rear leg；Also include mounting table, first support, second support, the 3rd support, the 4th support, front end panel, rear bearing sheet, left supported plate, left connection board, right supported plate and right connection board, mounting table is sleeved in stage body；Also include pillar, plate body, left connecting rod, left clamp, left spring group, left fixed plate, right connecting rod, right clamp, right groups of springs and right fixed plate；Also include that left slip ring, right slip ring, pedal, first place block, the second placement block, the 3rd placement block, the 4th placement block, the first pole, the second pole, the 3rd pole and the 4th pole, the 3rd support casing is in left slip ring.

Description

A kind of class stump

Technical field

The present invention relates to the technical field of education and instruction, more particularly to a kind of class stump.

Background technology

It is well known that class stump is a kind of in teaching process, carrying out teaching lecture, student is facilitated more preferably to receive The servicing unit of teaching knowledge, it is widely used in field of Education and teaching；Existing class with stump include stage body, Left front leg, left back leg, RAT and right rear leg, left front leg top are connected with stage body bottom front left side, left back leg top and stage body Bottom left rear side connection, RAT top is connected with stage body bottom forward right side, and right rear leg top is connected with stage body bottom right lateral side； This class need to only stand when being used with stump and be given a lecture on platform；Its teaching side is found in this class stump use Formula is more single, higher using limitation；And the height of podium is fixed, it is impossible to meet the not enough faculty of height to this The height requirement of stump, adaptability is poor, relatively low using reliability.

The content of the invention

In order to solve the above technical problems, the present invention provides one kind can increase teaching method, reduction uses limitation；Simultaneously can Meet height requirement of the not enough faculty of height to this stump, improve adaptability, enhancing is used using the class of reliability Stump.

A kind of class stump of the invention, including stage body, left front leg, left back leg, RAT and right rear leg；Also include putting Put platform, first support, second support, the 3rd support, the 4th support, front end panel, rear bearing sheet, left supported plate, left connection board, the right side Support plate and right connection board, the stage body include preceding placement plate, place plate, left placement plate and right placement plate, the left placement plate afterwards It is connected with preceding placement plate trailing flank left end and right-hand member respectively with right placement plate leading flank, left placement plate and right placement plate trailing flank divide It is not connected with rear placement plate leading flank left end and right-hand member, the front end panel bottom is connected with preceding placement plate top, front end panel Preceding standing groove is provided with rear wall, the rear bearing sheet bottom is connected with rear placement plate top, is set on rear bearing sheet front side wall Rear standing groove is equipped with, the left supported plate right-hand member is hinged with left connection board left end, and right supported plate left end is hinged with right connection board right-hand member, it is left Support plate, left connection board, right supported plate and right connection board front end are both placed in preceding standing groove, and rear end is both placed in rear standing groove, And left supported plate, left connection board, right supported plate and right connection board can in preceding standing groove and rear standing groove transverse shifting, the left branch Plate bottom left side and it is left placement plate tip contact, right supported plate bottom right side and it is right placement plate tip contact, left connection board right-hand member with Right connection board left end is contacted, and the left front leg, left back leg, RAT and right rear leg include piston rod, piston and pressure pipe, institute State four groups of piston rod tops respectively with preceding placement plate bottom left side, it is rear place plate bottom left side, preceding placement plate bottom right side and after The connection of plate bottom right side is placed, working chamber is provided with four groups of pressure pipes, four groups of pressure pipe tops are provided with sealing Fairlead, four groups of pistons are located in four groups of working chambers respectively, and four groups of piston rod bottoms are each passed through four groups of pressure pipe tops and divide It is not connected with four groups of top lands, needle-valve is provided with four groups of piston rods, through hole, the placement is provided with four groups of pistons Platform is sleeved in stage body, and not with preceding placement plate, place plate, left placement plate and right placement plate afterwards and contact, the first support, the Two supports, the 3rd support and the 4th cantilever tip connect with mounting table bottom front left side, forward right side, left rear side and right lateral side respectively Connect；Also include pillar, plate body, left connecting rod, left clamp, left spring group, left fixed plate, right connecting rod, right clamp, right groups of springs With right fixed plate, the mounting table top is provided with standing groove, and upper ball bearing, the branch are provided with upper standing groove Post bottom is inserted into upper ball bearing, and pillar top is connected with plate body bottom, and the plate body front end is provided with multimedia and inserts Plate, plate body rear end is provided with clipboard, is provided with inserting groove on the multimedia insertion-arrangement plate, the left connecting rod left end with insert Groove left side wall is connected, and left connecting rod right-hand member is connected with left clamp left end, and the left spring group left end is connected with left clamp right-hand member, left Groups of springs right-hand member is connected with left fixed plate left end, and the right connecting rod right-hand member is connected with inserting groove right side wall, right connecting rod left end It is connected with right clamp right-hand member, the right groups of springs right-hand member is connected with right clamp left end, right groups of springs left end and right fixed plate right-hand member Connection；Also include that left slip ring, right slip ring, pedal, first are placed block, second place block, the 3rd place block, the 4th place block, the One pole, the second pole, the 3rd pole and the 4th pole, the 3rd support casing is in left slip ring, and left slip ring can be relative 3rd bracket slide, the 4th support casing is in right slip ring, and right slip ring can be with respect to the 4th bracket slide, the left slip ring It is connected with pedal front end with right slip ring rear end, first pole includes the first threaded rod and the first screwed pipe, described first Place in block and be provided with the first standing groove, and the first ball bearing is placed with standing groove, first screwed pipe is inserted into In first ball bearing, the first threaded rod insertion and spiral shell is filled to inside the first screwed pipe top, the first threaded rod top and pedal Bottom right back connects, and second pole includes the second threaded rod and the second screwed pipe, is provided with the second placement block Second standing groove, and the second ball bearing is placed with standing groove, second screwed pipe is inserted into the second ball bearing, Simultaneously spiral shell is filled to inside the second screwed pipe top the insertion of second threaded rod, and the second threaded rod top connects with pedal bottom left back Connect, the 3rd pole includes the 3rd threaded rod and the 3rd screwed pipe, and the 3rd standing groove is provided with the 3rd placement block, and The 3rd ball bearing is placed with standing groove, the 3rd screwed pipe is inserted into the 3rd ball bearing, the 3rd threaded rod is inserted Enter and spiral shell is filled to inside the 3rd screwed pipe top, the 3rd threaded rod top is connected with pedal bottom right front, the described 4th Pole includes the 4th threaded rod and the 4th screwed pipe, and the 4th standing groove is provided with the 4th placement block, and in standing groove The 4th ball bearing is placed with, the 4th screwed pipe is inserted into the 4th ball bearing, simultaneously spiral shell is filled to the insertion of the 4th threaded rod Inside 4th screwed pipe top, the 4th threaded rod top is connected with pedal bottom left front.

A kind of class stump of the invention, also including left support abutment and right support abutment, the left support abutment top with place plate bottom End left side connection, left support abutment bottom is provided with left chain wheel, left chain wheel bottom and mounting table tip contact, the right support abutment top with The connection of plate bottom right side is placed, right support abutment bottom is provided with right pulley, right pulley bottom and mounting table tip contact.

A kind of class stump of the invention, also including left handle and right handle, the left handle is arranged on left connection board Top, right handle is arranged on right connection board top.

A kind of class stump of the invention, also including holder, is provided with placed cavity in the holder, holder is left Side wall is connected with right placement plate right side wall.

Beneficial effects of the present invention are compared with prior art：By above-mentioned setting, can be by pushing left connection board and the right side open Connecting plate, while being filled with gas mixture by four groups of closed pressure pipes, makes the pressure in four groups of working cavities high In several times of atmospheric pressure or tens times, it is respectively less than four groups of cross-sectional areas of piston using the cross-sectional area of four groups of piston rods and produces Pressure differential realize four groups of motions of piston rod, and then the height of stage body can be adjusted, afterwards can be by opening four Group needle valve switch falls stage body, allows multimedia insertion-arrangement plate and clipboard to expose, and setting by multimedia insertion-arrangement plate and clipboard Increase instructional mode is put, reduction uses limitation, while can be by the setting of pillar and upper ball bearing to multimedia insertion-arrangement plate Arbitrarily changed with clipboard, improved applicability；And can be by rotating the first screwed pipe, the second screwed pipe, the 3rd simultaneously Screwed pipe and the 4th screwed pipe adjust the height of pedal, so as to meet height of the not enough faculty of height to this stump Demand, improves adaptability, and enhancing uses reliability.

Brief description of the drawings

Fig. 1 is structural representation of the invention；

Fig. 2 is right side structure sectional view of the present invention；

Fig. 3 is the right view of Fig. 1；

Fig. 4 is the A-A full sectional views of Fig. 1；

Fig. 5 is the top view of Fig. 1；

Marked in accompanying drawing：1st, stage body, 2, left front leg；3rd, RAT；4th, right rear leg；5th, mounting table；6th, first support；7th, second Frame；8th, the 4th support；9th, front end panel；10th, rear bearing sheet；11st, left supported plate；12nd, left connection board；13rd, right supported plate；14th, right company Fishplate bar；15th, preceding placement plate；16th, plate is placed afterwards；17th, left placement plate；18th, right placement plate；19th, piston rod；20th, piston；21st, press Solenoid；22nd, seal guide sleeve；23rd, needle-valve；24th, through hole；25th, pillar；26th, plate body；27th, left connecting rod；28th, left fixed plate； 29th, right clamp；30th, right groups of springs；31st, right fixed plate；32nd, upper ball bearing；33rd, multimedia insertion-arrangement plate；34th, clipboard；35、 Right slip ring；36th, pedal；37th, first block is placed；38th, the 3rd block is placed；39th, the first pole；40th, the 3rd pole；41st, the first spiral shell Rasp bar；42nd, the first screwed pipe；43rd, the first ball bearing；44th, the 3rd ball bearing；45th, right support abutment；46th, left handle.

Specific embodiment

With reference to the accompanying drawings and examples, specific embodiment of the invention is described in further detail.Hereinafter implement Example is not limited to the scope of the present invention for illustrating the present invention.

As shown in Figures 1 to 5, a kind of class stump of the invention, including stage body 1, left front leg 2, left back leg, RAT 3 and right rear leg 4；Also include mounting table 5, first support 6, second support, the 3rd support 7, the 4th support 8, front end panel 9, after Supporting plate 10, left supported plate 11, left connection board 12, right supported plate 13 and right connection board 14, stage body include preceding placement plate 15, place plate afterwards 16th, it is left placement plate 17 and it is right placement plate 18, it is left placement plate and right placement plate leading flank respectively with it is preceding placement plate trailing flank left end and Right-hand member is connected, and left placement plate and right placement plate trailing flank are connected with rear placement plate leading flank left end and right-hand member respectively, front end panel Bottom is connected with preceding placement plate top, and preceding standing groove, rear bearing sheet bottom and rear placement plate are provided with front end panel rear wall Top is connected, and rear standing groove is provided with rear bearing sheet front side wall, and left supported plate right-hand member is hinged with left connection board left end, and right supported plate is left End is hinged with right connection board right-hand member, and left supported plate, left connection board, right supported plate and right connection board front end are both placed in preceding standing groove, Rear end is both placed in rear standing groove, and left supported plate, left connection board, right supported plate and right connection board can preceding standing groove and after put Put transverse shifting in groove, the left supported plate bottom left side and left placement plate tip contact, right supported plate bottom right side and right placement plate Tip contact, left connection board right-hand member is contacted with right connection board left end, and left front leg, left back leg, RAT and right rear leg include living Stopper rod 19, piston 20 and pressure pipe 21, four groups of piston rod tops are left with preceding placement plate bottom left side, rear placement plate bottom respectively Side, preceding placement plate bottom right side and rear plate bottom right side of placing are connected, and working chamber, four groups of pressure are provided with four groups of pressure pipes Pipe top is provided with seal guide sleeve 22, and four groups of pistons are located in four groups of working chambers respectively, and four groups of piston rod bottoms are worn respectively Cross at the top of four groups of pressure pipes and be connected respectively with four groups of top lands, needle-valve 23, four groups of pistons are provided with four groups of piston rods On be provided with through hole 24, mounting table is sleeved in stage body, and not with preceding placement plate, place plate, left placement plate and right placement afterwards Plate contact, first support, second support, the 3rd support and the 4th cantilever tip respectively with mounting table bottom front left side, the right side before The connection of side, left rear side and right lateral side；Also include pillar 25, plate body 26, left connecting rod 27, left clamp, left spring group, left fixed plate 28th, right connecting rod, right clamp 29, right groups of springs 30 and right fixed plate 31, mounting table top is provided with standing groove, and is put upper Put and be provided with groove upper ball bearing 32, pillar bottom is inserted into upper ball bearing, and pillar top is connected with plate body bottom, plate Body front end is provided with multimedia insertion-arrangement plate 33, and plate body rear end is provided with clipboard 34, inserting groove is provided with multimedia insertion-arrangement plate, Left connecting rod left end is connected with inserting groove left side wall, and left connecting rod right-hand member is connected with left clamp left end, left spring group left end with it is left Clamp right-hand member is connected, and left spring group right-hand member is connected with left fixed plate left end, and right connecting rod right-hand member is connected with inserting groove right side wall, right Connecting rod left end is connected with right clamp right-hand member, and right groups of springs right-hand member is connected with right clamp left end, right groups of springs left end and right fixation Plate right-hand member is connected；Also include left slip ring, right slip ring 35, pedal 36, first place block 37, second place block, the 3rd place block 38, 4th places block, the first pole 39, the second pole, the 3rd pole 40 and the 4th pole, and the 3rd support casing is mounted in left slip ring, and Left slip ring can be with respect to the 3rd bracket slide, and the 4th support casing is in right slip ring, and right slip ring can be left with respect to the 4th bracket slide Slip ring and right slip ring rear end are connected with pedal front end, and the first pole includes the first threaded rod 41 and the first screwed pipe 42, first Place in block and be provided with the first standing groove, and the first ball bearing 43 is placed with standing groove, the first screwed pipe is inserted into the In one ball bearing, the first threaded rod insertion and spiral shell is filled to inside the first screwed pipe top, the first threaded rod top and pedal bottom End right back connection, the second pole includes the second threaded rod and the second screwed pipe, and the second standing groove is provided with the second placement block, And the second ball bearing is placed with standing groove, the second screwed pipe is inserted into the second ball bearing, the insertion of the second threaded rod And spiral shell is filled to inside the second screwed pipe top, the second threaded rod top is connected with pedal bottom left back, and the 3rd pole includes the Three threaded rods and the 3rd screwed pipe, are provided with the 3rd standing groove, and the 3rd ball is placed with standing groove in the 3rd placement block Bearing 44, the 3rd screwed pipe is inserted into the 3rd ball bearing, and simultaneously spiral shell is filled in the 3rd screwed pipe top the insertion of the 3rd threaded rod Portion, the 3rd threaded rod top is connected with pedal bottom right front, and the 4th pole includes the 4th threaded rod and the 4th screwed pipe, the 4th Place in block and be provided with the 4th standing groove, and the 4th ball bearing is placed with standing groove, the 4th screwed pipe is inserted into the 4th In ball bearing, the 4th threaded rod insertion and spiral shell is filled to inside the 4th screwed pipe top, the 4th threaded rod top and pedal bottom Left front connects；By above-mentioned setting, can be by pushing left connection board and right connection board open, while by four groups of closed pressure Gas mixture is filled with pipe, the pressure in four groups of working cavities is above several times or tens times of atmospheric pressure, using four The cross-sectional area of group piston rod is respectively less than four groups of pressure differentials of the cross-sectional areas generation of piston to realize four groups of motions of piston rod, And then the height of stage body can be adjusted, stage body can be fallen by opening four groups of needle valve switch afterwards, allow multimedia to insert Plate and clipboard expose, and the setting increase instructional mode for passing through multimedia insertion-arrangement plate and clipboard, and reduction uses limitation, together When multimedia insertion-arrangement plate and clipboard can arbitrarily be changed by the setting of pillar and upper ball bearing, improve applicability； And the height of pedal can be adjusted by rotating the first screwed pipe, the second screwed pipe, the 3rd screwed pipe and the 4th screwed pipe simultaneously Degree, so as to meet height requirement of the not enough faculty of height to this stump, improves adaptability, and enhancing uses reliable Property.

A kind of class stump of the invention, also including left support abutment and right support abutment 45, left support abutment top with place plate bottom Left side connects, and left support abutment bottom is provided with left chain wheel, left chain wheel bottom and mounting table tip contact, right support abutment top and placement plate Bottom right side connection, right support abutment bottom is provided with right pulley, right pulley bottom and mounting table tip contact；By above-mentioned setting, The support force of plate body and branch intercolumniation can be strengthened, stability is improved.

A kind of class stump of the invention, also including left handle 46 and right handle, left handle is arranged on left connection board top End, right handle is arranged on right connection board top；By above-mentioned setting, can facilitate and left connection board and right connection board are promoted, Improve practicality.

A kind of class stump of the invention, also including holder 47, is provided with placed cavity, holder left side in holder Wall is connected with right placement plate right side wall；By above-mentioned setting, teacher can be facilitated to place realia.

A kind of class stump of the invention, it can hold left handle and right handle when in use, while pushing left connection open Plate and right connection board, gas mixture is filled with by four groups of closed pressure pipes, makes the pressure in four groups of working cavities equal Several times of superatmospheric or tens times, it is respectively less than four groups of cross-sectional areas of piston using the cross-sectional area of four groups of piston rods and produces Raw pressure differential realizes four groups of motions of piston rod, and then the height of stage body can be adjusted, and four groups of pins are opened afterwards Threshold switch falls stage body, allows multimedia insertion-arrangement plate and clipboard to expose, and multimedia display board is consolidated mounted in left fixed plate and the right side Between fixed board, multimedia teaching is carried out, while teaching writing can be carried out on clipboard, and can be by pillar and upper ball bearing Setting multimedia insertion-arrangement plate and clipboard are arbitrarily changed；And can be by rotating the first screwed pipe, the second spiral shell simultaneously Line pipe, the 3rd screwed pipe and the 4th screwed pipe adjust the height of pedal, are stood after mixing up and are taught on pedal.

The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, on the premise of the technology of the present invention principle is not departed from, some improvement and modification can also be made, these are improved and modification Also should be regarded as protection scope of the present invention.

Claims

1. a kind of class stump of the invention, including stage body（1）, left front leg（2）, left back leg, RAT（3）And right rear leg （4）；Characterized in that, also including mounting table（5）, first support（6）, second support（7）, the 3rd support, the 4th support（8）、 Front end panel（9）, rear bearing sheet（10）, left supported plate（11）, left connection board（12）, right supported plate（13）And right connection board（14）, institute State stage body（1）Including preceding placement plate（15）, place plate afterwards（16）, left placement plate（17）With right placement plate（18）, the left placement Plate（17）With right placement plate（18）Leading flank respectively with preceding placement plate（15）Trailing flank left end and right-hand member are connected, left placement plate（17） With right placement plate（18）Trailing flank respectively with rear placement plate（18）Leading flank left end and right-hand member are connected, the front end panel（9）Bottom End and preceding placement plate（18）Top connects, front end panel（9）Preceding standing groove, the rear bearing sheet are provided with rear wall（10）Bottom End and rear placement plate（18）Top connects, rear bearing sheet（10）Rear standing groove, the left supported plate are provided with front side wall（11）It is right End and left connection board（12）Left end is hinged, right supported plate（13）Left end and right connection board（14）Right-hand member is hinged, left supported plate（11）, Zuo Lian Fishplate bar（12）, right supported plate（13）And right connection board（14）Front end is both placed in preceding standing groove, and rear end is both placed in rear standing groove It is interior, and left supported plate（11）, left connection board（12）, right supported plate（13）And right connection board（14）Can be in preceding standing groove and rear standing groove Interior transverse shifting, the left supported plate（11）Bottom left side and left placement plate（17）Tip contact, right supported plate（13）Bottom right side with Right placement plate（18）Tip contact, left connection board（12）Right-hand member and right connection board（14）Left end is contacted, the left front leg（2）, it is left Back leg, RAT（3）And right rear leg（4）Include piston rod（19）, piston（20）And pressure pipe（21）, four groups of piston rods （19）Top respectively with preceding placement plate（15）On the left of bottom, plate is placed afterwards（16）Bottom left side, preceding placement plate（15）Bottom right side With rear placement plate（16）The connection of bottom right side, four groups of pressure pipes（21）Inside it is provided with working chamber, four groups of pressure pipes（21） Top is provided with seal guide sleeve（22）, four groups of pistons（20）It is located in four groups of working chambers respectively, four groups of piston rods（19）Bottom End is each passed through four groups of pressure pipes（21）Top and respectively with four groups of pistons（20）Top connects, four groups of piston rods（19）On be all provided with It is equipped with needle-valve（23）, four groups of pistons（20）On be provided with through hole（24）, the mounting table（5）It is sleeved on stage body（1）It is interior, and not With preceding placement plate（15）, place plate afterwards（16）, left placement plate（17）With right placement plate（18）Contact, the first support（6）, Two supports（7）, the 3rd support and the 4th cantilever tip respectively with mounting table（5）Bottom front left side, forward right side, left rear side and the right side Rear side is connected；Also include pillar（25）, plate body（26）, left connecting rod（27）, left clamp, left spring group, left fixed plate（28）, it is right Connecting rod, right clamp（29）, right groups of springs（30）With right fixed plate（31）, the mounting table（5）Top is provided with standing groove, And it is provided with upper ball bearing in upper standing groove（32）, the pillar（25）Bottom is inserted into upper ball bearing（32）It is interior, branch Post（25）Top and plate body（26）Bottom connects, the plate body（26）Front end is provided with multimedia insertion-arrangement plate（33）, plate body rear end It is provided with clipboard（34）, the multimedia insertion-arrangement plate（33）On be provided with inserting groove, the left connecting rod（27）Left end with insert Put the connection of groove left side wall, left connecting rod（27）Right-hand member is connected with left clamp left end, the left spring group left end and left clamp right-hand member Connection, left spring group right-hand member and left fixed plate（28）Left end is connected, and the right connecting rod right-hand member is connected with inserting groove right side wall, right Connecting rod left end and right clamp（29）Right-hand member is connected, the right groups of springs（30）Right-hand member and right clamp（29）Left end is connected, right bullet Spring group（30）Left end and right fixed plate（31）Right-hand member is connected；Also include left slip ring, right slip ring（35）, pedal（36）, first place Block（37）, second place block（38）, the 3rd place block, the 4th place block, the first pole（39）, the second pole, the 3rd pole （40）With the 4th pole, the 3rd support casing is in left slip ring, and left slip ring can be with respect to the 3rd bracket slide, the described 4th Support（8）It is sleeved on right slip ring（35）It is interior, and right slip ring（35）Can be with respect to the 4th support（8）Slip, the left slip ring and right cunning Ring（8）Rear end is and pedal（36）Front end connects, first pole（39）Including the first threaded rod（40）With the first screwed pipe （41）, described first places block（37）The first standing groove is inside provided with, and the first ball bearing is placed with standing groove（42）, First screwed pipe（41）It is inserted into the first ball bearing（42）It is interior, the first threaded rod（40）Insert and spiral shell is filled to the first screw thread Pipe（41）Inside top, the first threaded rod（40）Top and pedal（36）Bottom right back connects, and second pole includes the Two threaded rods and the second screwed pipe, are provided with the second standing groove, and second is placed with standing groove in the second placement block Ball bearing, second screwed pipe is inserted into the second ball bearing, and simultaneously spiral shell is filled to the second screwed pipe to the insertion of the second threaded rod Inside top, the second threaded rod top is connected with pedal bottom left back, the 3rd pole include the 3rd threaded rod and 3rd screwed pipe, is provided with the 3rd standing groove, and the 3rd ball bearing is placed with standing groove in the 3rd placement block （44）, the 3rd screwed pipe is inserted into the 3rd ball bearing（44）Interior, simultaneously spiral shell is filled to the 3rd screwed pipe to the insertion of the 3rd threaded rod Inside top, the 3rd threaded rod top is connected with pedal bottom right front, the 4th pole include the 4th threaded rod and 4th screwed pipe, the 4th standing groove is provided with the 4th placement block, and the 4th ball bearing is placed with standing groove, institute State the 4th screwed pipe to be inserted into the 4th ball bearing, simultaneously spiral shell is filled to inside the 4th screwed pipe top the insertion of the 4th threaded rod, institute The 4th threaded rod top is stated to be connected with pedal bottom left front.

2. a kind of class stump as claimed in claim 1, it is characterised in that also including left support abutment and right support abutment（45）, institute State left support abutment top and be connected with plate bottom left side is placed, left support abutment bottom is provided with left chain wheel, left chain wheel bottom and mounting table top End in contact, the right support abutment（45）Top is connected with plate bottom right side is placed, right support abutment（45）Bottom is provided with right pulley, right cunning Wheel bottom and mounting table（5）Tip contact.

3. a kind of class stump as claimed in claim 2, it is characterised in that also including left handle（46）With right handle, institute State left handle（46）Left connection board top is arranged on, right handle is arranged on right connection board top.

4. a kind of class stump as claimed in claim 3, it is characterised in that also including holder（47）, the holder （47）Inside it is provided with placed cavity, holder（47）Left side wall and right placement plate（18）Right side wall is connected.