CN111264131B - Sand land planting hole excavating and fixing device - Google Patents

Sand land planting hole excavating and fixing device Download PDF

Info

Publication number
CN111264131B
CN111264131B CN202010181460.4A CN202010181460A CN111264131B CN 111264131 B CN111264131 B CN 111264131B CN 202010181460 A CN202010181460 A CN 202010181460A CN 111264131 B CN111264131 B CN 111264131B
Authority
CN
China
Prior art keywords
positioning cylinder
fixing ring
positioning
fixing
well core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010181460.4A
Other languages
Chinese (zh)
Other versions
CN111264131A (en
Inventor
汤顺福
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaoxing Zhenji Textile Co ltd
Original Assignee
Shaoxing Lanhai Environmental Protection Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shaoxing Lanhai Environmental Protection Technology Co ltd filed Critical Shaoxing Lanhai Environmental Protection Technology Co ltd
Priority to CN202010181460.4A priority Critical patent/CN111264131B/en
Publication of CN111264131A publication Critical patent/CN111264131A/en
Application granted granted Critical
Publication of CN111264131B publication Critical patent/CN111264131B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C5/00Making or covering furrows or holes for sowing, planting or manuring
    • A01C5/04Machines for making or covering holes for sowing or planting

Abstract

The invention discloses a sand planting pit excavating and fixing device which comprises a power box, wherein a central rod vertically penetrates through the inner center of the power box, a positioning cylinder is vertically arranged at the bottom of the power box, a fixing ring is arranged on the outer wall of the fixing ring in a surrounding manner, a positioning sheet is fixedly connected to the bottom of the fixing ring, and a connecting shaft is arranged at the top of the fixing ring in a surrounding manner of the positioning cylinder. According to the invention, the transmission plate in the positioning cylinder is driven by the fixing ring to move towards the rotating head, so that the inner magnet pieces are close to the bottoms of the rhombic plates, the bottoms of the rhombic plates are correspondingly attached to the magnet pieces, the tops of the rhombic plates are inclined outwards and inserted into the side wall of an external foundation pit, the pull rod is clamped with the teeth on the side wall of the positioning cylinder under the action of the telescopic spring, the side wall of the foundation pit can be effectively fixed, the foundation pit collapse can be prevented, the shaking is reduced, and the artificial fixation is not needed.

Description

Sand land planting hole excavating and fixing device
Technical Field
The invention relates to the technical field of environmental protection, in particular to a sand planting pit excavating and fixing device.
Background
The consciousness of the people in China on the environmental protection is gradually deepened, and the nation also calls for the people to plant trees and afforest vigorously, but the environmental protection also needs to be carried out according to the actual situation, in some areas in the northwest of China, because the land is seriously desertified, the method is not suitable for planting higher trees, but small thorns plants are easy to survive, so the people usually plant the plants on sandy land.
But traditional planting mode needs artifical excavation to plant the hole, and this kind of mode is not only inefficient, moreover because the sand and soil is comparatively soft, arouses very easily when excavating great foundation ditch to collapse, leads to can't going to plant the crop to some present mechanized equipment of digging the hole, lack fixing device usually, dig pivoted in-process downwards and need many people to support, just can keep stable very troublesome.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a sand planting pit excavating and fixing device which has the advantages of preventing foundation pit collapse, reducing shaking and avoiding manual fixation, and solves the problems of difficult operation, easy collapse and difficult fixation of the foundation pit in the traditional mode.
(II) technical scheme
In order to achieve the purposes of preventing foundation pit collapse and reducing shaking without manual fixation, the invention provides the following technical scheme: a sand planting pit digging fixing device comprises a power box, wherein a central rod vertically penetrates through the center inside the power box, the bottom of the power box is vertically provided with a positioning cylinder, the outer wall of the fixing ring is provided with a fixing ring in a surrounding manner, the bottom of the fixing ring is fixedly connected with a positioning sheet, the top of the fixing ring is provided with a connecting shaft around the positioning cylinder, one end of the connecting shaft, which is far away from the positioning cylinder, is rotatably connected with a connecting sleeve, one end of the connecting shaft, which is close to the positioning cylinder, is rotatably connected with a tension spring, the tension spring is rotationally connected with the positioning cylinder through a rotating shaft, the surface of the positioning cylinder is provided with a groove, the bottom of the groove of the positioning cylinder is rotatably connected with a diamond plate, the top of each connecting shaft is connected with a fixing line, a plurality of pull rods are arranged among the connecting shafts, and one side, close to the positioning cylinder, of each pull rod is provided with a telescopic spring.
Preferably, the pull rod leads to and solid fixed ring sliding connection each other, the outer wall of a location section of thick bamboo is the slope with the position that the pull rod corresponds each other and is provided with tooth downwards, tooth and the mutual joint of pull rod, tooth is made for rubber.
Preferably, the inside of a location section of thick bamboo is close to the position of rhombus board and is provided with the sliding tray, the inside of sliding tray is the vertical driving plate that is provided with, connecting wire and solid fixed ring interconnect are passed through at the top of driving plate, the inside of driving plate is the intermittent type and is provided with the magnet piece, the rhombus board is made for the metal.
Preferably, the center rod penetrates through the inner center of the positioning cylinder, a rotating head is fixedly connected to the bottom of the center rod, the center rod is rotatably connected with the positioning cylinder, a helical gear is arranged in the power box of the center rod, and the helical gear is connected with a power device in the power box.
Preferably, the top of fixed line passes the inside of headstock and the mutual fixed connection of lateral wall of well core rod, the inside of headstock is provided with drive arrangement, drive arrangement's power take off end and well core rod rotation are connected, well core rod's top is run through the headstock and is rotated and be connected with the connection handle, the inside driving motor that is provided with of headstock.
Preferably, solid fixed ring is the annular shape, the spacer of solid fixed ring bottom is vertical fixed, gu fixed ring's top is connected with adapter sleeve, tension spring rotation each other respectively through the connecting axle, gu fixed ring makes for the metal.
Preferably, the inside of tension spring is provided with the connecting pipe that cup joints each other, the adapter sleeve comprises a plurality of connecting pipes each other, the inside of adapter sleeve is provided with fixed spring, the adapter sleeve is made for the metal.
Preferably, the rotating head is arranged in a conical shape, the connecting handle is in a circular ring shape, an anti-slip rubber sleeve is arranged at the edge of the connecting handle, and the rotating head is made of metal.
Advantageous effects
Compared with the prior art, the invention provides a sand planting pit excavating and fixing device which has the following beneficial effects:
1. when using, move the equipment suitable position, connect the handle through pressing down, make well core rod remove to the bottom, and then lead to the fixed line to relax, make fixed ring move to the bottom under the effect of gravity, and then drive the inside driving plate of a location section of thick bamboo through solid fixed ring and remove to the rotor, make inside magnet piece and the bottom of rhombus board be close to each other, and then make the bottom of rhombus board and the laminating of magnet piece mutual correspondence, and then lead to rhombus board top to the outside slope, insert the inside of outside foundation ditch lateral wall, can effectual fixed foundation ditch lateral wall, prevent to collapse, it is rotatory that the rotor that the headstock drives the bottom through well core rod, it drives the rotor to remove to the bottom to press down to connect the handle, and then to excavate out the planting hole, and it is less to excavate the area, can save time and.
2. The fixing of the fixing ring can be released through the movement of the fixing line, after the positioning cylinder enters the sand soil, the central rod moves downwards to drive the fixed ring to move, so that the tension spring and the connecting sleeve extrude the connecting shaft towards the bottom, the fixing ring is driven by the connecting shaft to automatically move towards the bottom, so that the positioning sheet at the bottom of the fixing ring is attached and fixed with the ground, and the top of the fixing ring is provided with the pull rod, the pull rod is clamped with the teeth on the side wall of the positioning cylinder under the action of the telescopic spring, so that the fixed ring can be prevented from rising, the device is further fixed by the fixing ring, and the positioning cylinder has a tendency of moving upwards and the diamond plate inclines upwards due to the downward extrusion of the fixing ring, so that the diamond plate can be inserted into the soil, and then guarantee location section of thick bamboo rigidity and prevent the incline, prevent that a location section of thick bamboo from popping out, need not artifical the pressing at the during operation, use manpower sparingly.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a side view of the structure of the present invention in use;
FIG. 3 is a top plan view of a retaining ring constructed in accordance with the present invention;
fig. 4 is a sectional view of the inside of the positioning cylinder of the structure of the present invention.
In the figure: 1. a power box; 2. a center pole; 3. a positioning cylinder; 4. a fixing ring; 5. positioning plates; 6. a connecting shaft; 7. connecting sleeves; 8. a tension spring; 9. a rotating shaft; 10. a diamond plate; 11. fixing the wire; 12. a pull rod; 13. a tension spring; 14. a sliding groove; 15. a drive plate; 16. rotating the head; 17. is connected with the handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without any creative effort are within the protection scope of the present invention.
Referring to fig. 1-3, a sand planting pit digging fixing device comprises a power box 1, a central rod 2 vertically penetrates through the inner center of the power box 1, a positioning cylinder 3 vertically arranged at the bottom of the power box 1, a fixing ring 4 surrounding the outer wall of the fixing ring 4, a positioning sheet 5 fixedly connected to the bottom of the fixing ring 4, a connecting shaft 6 arranged at the top of the fixing ring 4 surrounding the positioning cylinder 3, a connecting sleeve 7 rotatably connected to one end of the connecting shaft 6 far away from the positioning cylinder 3, a tension spring 8 rotatably connected to one end of the connecting shaft 6 near the positioning cylinder 3, the tension spring 8 rotatably connected to the positioning cylinder 3 through a rotating shaft 9, a groove arranged on the surface of the positioning cylinder 3, a diamond plate 10 rotatably connected to the bottom of the groove of the positioning cylinder 3, a fixing line 11 connected to the top of the connecting shaft 6, and a pull rod 12 arranged between the, a telescopic spring 13 is arranged on one side of the pull rod 12 close to the positioning cylinder 3.
The pull rod 12 leads to and 4 mutual sliding connection of solid fixed ring, and the outer wall of a location section of thick bamboo 3 is the slope with the position that pull rod 12 corresponds each other and is provided with tooth downwards, tooth and the mutual joint of pull rod 12, and it is fixed to remove through pulling pull rod 12 after processing is accomplished, and solid fixed ring 4 of rebound drives driving plate 15 and rises again for rhombus plate 10 downward sloping can be convenient take out a location section of thick bamboo 3.
The inside position that is close to diamond plate 10 of a location section of thick bamboo 3 is provided with sliding tray 14, and the inside of sliding tray 14 is vertical driving plate 15 that is provided with, and connecting wire and solid fixed ring 4 interconnect are passed through at the top of driving plate 15, and the inside of driving plate 15 is the intermittent type and is provided with the magnet piece.
Well core rod 2 runs through the inside center of a location section of thick bamboo 3, and well core rod 2's bottom fixedly connected with rotates head 16, and well core rod 2 rotates each other with a location section of thick bamboo 3 to be connected, through pressing down connection handle 17 for well core rod 2 removes to the bottom, and then leads to fixed line 11 to relax, makes solid fixed ring 4 move to the bottom under the effect of gravity.
The top of fixed line 11 passes the inside of headstock 1 and the mutual fixed connection of lateral wall of well core rod 2, and the inside of headstock 1 is provided with drive arrangement, and drive arrangement's power take off end is connected with well core rod 2 rotation, and well core rod 2's top is run through headstock 1 and is rotated and be connected with and connect handle 17.
Solid fixed ring 4 is the ring shape, and the spacer 5 of solid fixed ring 4 bottom is vertical fixed, and solid fixed ring 4's top is passed through connecting axle 6 respectively with adapter sleeve 7, tension spring 8 rotation each other, and the spacer 5 of connecting solid fixed ring 4 bottom is fixed with the ground laminating to because solid fixed ring 4's top is provided with pull rod 12, pull rod 12 and the mutual joint of tooth of 3 lateral walls of a location section of thick bamboo under the effect of expanding spring 13, can prevent solid fixed ring 4 from rising.
The inside of tension spring 8 is provided with the connecting pipe that cup joints each other, and adapter sleeve 7 comprises a plurality of connecting pipes each other, and the inside of adapter sleeve 7 is provided with fixed spring, and do the downstream movement through the center and drive solid fixed ring 4 and remove for tension spring 8 all extrudees connecting axle 6 to the bottom with adapter sleeve 7, drives solid fixed ring 4 through connecting axle 6 and moves to the bottom automatically.
The rotating head 16 is in a conical shape, the connecting handle 17 is in a circular ring shape, the edge of the connecting handle 17 is provided with an anti-skidding rubber sleeve, the connecting handle 17 is pressed downwards to drive the rotating head 16 to move towards the bottom, then the planting pit is excavated, the excavating area is smaller, and the time can be saved to prevent collapse.
The working principle is as follows: when the device is used, the device is moved to a proper position, the connecting handle 17 is pressed downwards, the central rod 2 is moved towards the bottom, the fixing wire 11 is loosened, the fixing ring 4 is moved towards the bottom under the action of gravity, the fixing ring 4 drives the transmission plate 15 inside the positioning cylinder 3 to move towards the rotating head 16, the magnet sheet inside the positioning cylinder is moved towards the bottom of the diamond plate 10, the bottom of the diamond plate 10 is correspondingly attached to the magnet sheet, the top of the diamond plate 10 is inclined towards the outside, the positioning cylinder is inserted into the side wall of an external foundation pit, the side wall of the foundation pit can be effectively fixed and prevented from collapsing, the power box 1 drives the rotating head 16 at the bottom to rotate through the central rod 2, the connecting handle 17 is pressed downwards to drive the rotating head 16 to move towards the bottom, the planting pit is excavated out, the excavating area is small, the time can be saved and the collapse can, the fixing of the fixing ring 4 can be released through the movement of the fixing wire 11, after the positioning cylinder 3 enters sandy soil, the fixing ring 4 is driven to move through the downward movement of the central rod, the tension spring 8 and the connecting sleeve 7 extrude the connecting shaft 6 towards the bottom, the fixing ring 4 is driven to automatically displace towards the bottom through the connecting shaft 6, the positioning sheet 5 at the bottom of the fixing ring 4 is attached and fixed with the ground, and the top of the fixing ring 4 is provided with the pull rod 12, the pull rod 12 is clamped with teeth on the side wall of the positioning cylinder 3 under the action of the expansion spring 13, the fixing ring 4 can be prevented from rising, and then the device is fixed through the fixing ring 4, and the positioning cylinder 3 has the tendency of moving upwards due to the downward extrusion of the fixing ring 4, the diamond plate 10 inclines upwards, the diamond plate 10 can be inserted into the soil, and the position of the positioning, prevent that a location section of thick bamboo 3 from popping out, need not the manual work at the during operation and press, use manpower sparingly, remove fixedly through pulling pull rod 12 after processing is accomplished, solid fixed ring 4 of rebound again drives driving plate 15 and rises for rhombus plate 10 downward sloping, can be convenient take out a location section of thick bamboo 3.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a pit excavation fixing device is planted to sand, includes headstock (1), its characterized in that: the power box is characterized in that a central rod (2) vertically penetrates through the inner center of the power box (1), a positioning cylinder (3) is vertically arranged at the bottom of the power box (1), a fixing ring (4) is arranged around the outer wall of the positioning cylinder (3), a positioning sheet (5) is fixedly connected to the bottom of the fixing ring (4), a connecting shaft (6) is arranged at the top of the fixing ring (4) around the positioning cylinder (3), a connecting sleeve (7) is rotatably connected to one end, far away from the positioning cylinder (3), of the connecting shaft (6), a tension spring (8) is rotatably connected to one end, close to the positioning cylinder (3), of the connecting shaft (6), the tension spring (8) is rotatably connected with the positioning cylinder (3) through a rotating shaft (9), a groove is formed in the surface of the positioning cylinder (3), and a diamond plate (10) is rotatably connected to the bottom of the groove of, the top of each connecting shaft (6) is connected with a fixing wire (11), pull rods (12) are arranged among the connecting shafts (6), and one side, close to the positioning barrel (3), of each pull rod (12) is provided with a telescopic spring (13); the pull rod (12) is connected with the fixing ring (4) in a sliding mode, teeth are obliquely and downwards arranged at the positions, corresponding to the pull rod (12), of the outer wall of the positioning cylinder (3), and the teeth are clamped with the pull rod (12) in a clamping mode; a sliding groove (14) is formed in the position, close to the diamond plate (10), in the positioning cylinder (3), a transmission plate (15) is vertically arranged in the sliding groove (14), the top of the transmission plate (15) is connected with the fixing ring (4) through a connecting line, and magnet pieces are intermittently arranged in the transmission plate (15); well core rod (2) run through the inside center of a location section of thick bamboo (3), the bottom fixedly connected with of well core rod (2) rotates head (16), well core rod (2) and a location section of thick bamboo (3) rotation each other are connected.
2. The sand planting pit digging fixture according to claim 1, wherein: the top of fixed line (11) passes the inside of headstock (1) and the mutual fixed connection of lateral wall of well core rod (2), the inside of headstock (1) is provided with drive arrangement, drive arrangement's power take off end is connected with well core rod (2) rotation, the top of well core rod (2) is run through headstock (1) and is rotated and be connected with connection handle (17).
3. The sand planting pit digging fixture according to claim 2, wherein: the fixing ring (4) is in a ring shape, the positioning piece (5) at the bottom of the fixing ring (4) is vertically fixed, and the top of the fixing ring (4) is rotatably connected with the connecting sleeve (7) and the tension spring (8) through the connecting shaft (6).
4. The sand planting pit digging fixture according to claim 3, wherein: the connecting pipe that cup joints each other is provided with in the inside of tension spring (8), adapter sleeve (7) comprises a plurality of connecting pipes each other, the inside of adapter sleeve (7) is provided with fixed spring.
5. The sand planting pit digging fixture according to claim 4, wherein: the rotating head (16) is arranged in a conical shape, the connecting grip (17) is in a circular ring shape, and an anti-skid rubber sleeve is arranged at the edge of the connecting grip (17).
CN202010181460.4A 2020-03-16 2020-03-16 Sand land planting hole excavating and fixing device Active CN111264131B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010181460.4A CN111264131B (en) 2020-03-16 2020-03-16 Sand land planting hole excavating and fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010181460.4A CN111264131B (en) 2020-03-16 2020-03-16 Sand land planting hole excavating and fixing device

Publications (2)

Publication Number Publication Date
CN111264131A CN111264131A (en) 2020-06-12
CN111264131B true CN111264131B (en) 2021-03-12

Family

ID=71000667

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010181460.4A Active CN111264131B (en) 2020-03-16 2020-03-16 Sand land planting hole excavating and fixing device

Country Status (1)

Country Link
CN (1) CN111264131B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113196911B (en) * 2021-05-14 2022-03-18 内蒙古农业大学 Device for digging Saiwai planting hole on sandy land and soil improvement method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1057623A1 (en) * 1982-07-01 1983-11-30 Тюменский инженерно-строительный институт Versions of driven-in pile
FR3006144A1 (en) * 2013-06-04 2014-12-05 Alex Paul Heulin PLANT FOR PLANT OF VINE WITH LONG ROOTS
CN204721824U (en) * 2015-04-24 2015-10-28 垫江县朝阳小学校 A kind of portable manual tree planting digging apparatus
CN107123217A (en) * 2017-06-14 2017-09-01 江苏德溢利新材料科技有限公司 A kind of intelligent monitor-type pile
CN208219644U (en) * 2018-03-11 2018-12-11 肖礼全 A kind of oil exploitation is with beating ground pile
CN209710825U (en) * 2019-01-27 2019-12-03 铁木尔巴格那 A kind of gas sand surfing willow planting unit for sand ground plantation
CN110761284B (en) * 2019-10-24 2021-05-28 张之景 Slope anchor for building municipal works

Also Published As

Publication number Publication date
CN111264131A (en) 2020-06-12

Similar Documents

Publication Publication Date Title
US9924643B2 (en) Intelligent tree transplanter
CN112703852A (en) Intelligent fruit tree machine of digging pit
CN209882521U (en) Forestry is planted tree and is used digging device
CN108782115B (en) Automatic tree planting equipment
CN111264130A (en) Planting device for fruit trees
CN111264131B (en) Sand land planting hole excavating and fixing device
CN107864727A (en) A kind of drum-type kind seedling-planting apparatus
CN108093759A (en) A kind of digging apparatus with collection soil
CN112400419A (en) Seeding device with farmland soil restoration function on accurate planting basis
CN109322530B (en) Anti-loosening telegraph pole burying device based on stepless speed change
CN214316194U (en) Garden tree plants with digging device
CN215301433U (en) Gardening is with planter that digs pit fast
CN111820097B (en) Automatic transplanting and planting device for agricultural seedlings and using method
CN213368587U (en) Gardens are with flowers and plants planting digging device
CN113924847A (en) Directional reaming seedling planting device and method for landscape gardens
CN215223012U (en) Afforestation tree is transplanted and digs device with planting hole
CN211960008U (en) Digging device for preventing mud from splashing for urban landscaping cultivation
CN218570817U (en) Digging device for agricultural planting
CN217742217U (en) Digging device for landscaping
CN215601833U (en) Forestry seedling planting is with equipment of digging pit
CN210298484U (en) Be used for digging hole to mend kind of a device
CN215073828U (en) A earth boring machine for seedling planting
CN218570821U (en) Pit digging machine for fruit tree planting
CN216415049U (en) A quick digging device for tissue culture sapling is planted
CN218784088U (en) Fruit tree bores ground fertilization with fertilization earth boring machine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20230907

Address after: 312030, 2nd Floor, Building 7, Shaoxing Tianchang Polymer Materials Co., Ltd., Ruangang Village, Lanting Street, Keqiao District, Shaoxing City, Zhejiang Province

Patentee after: Shaoxing Zhenji Textile Co.,Ltd.

Address before: 312000 No.72 xihuafan, Qianfan village, Anchang street, Keqiao District, Shaoxing City, Zhejiang Province

Patentee before: Shaoxing Lanhai Environmental Protection Technology Co.,Ltd.

TR01 Transfer of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A fixed device for excavating sand planting pits

Effective date of registration: 20231008

Granted publication date: 20210312

Pledgee: Zhejiang Shaoxing Ruifeng Rural Commercial Bank Co.,Ltd. Lanting Sub branch

Pledgor: Shaoxing Zhenji Textile Co.,Ltd.

Registration number: Y2023980060127

PE01 Entry into force of the registration of the contract for pledge of patent right