CN112586269A

CN112586269A - Tree planting centralizing adjusting device

Info

Publication number: CN112586269A
Application number: CN202110031357.6A
Authority: CN
Inventors: 冯利华
Original assignee: Dongming County Landscaping Management Office
Current assignee: Dongming County Landscaping Management Office
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-04-02
Anticipated expiration: 2041-01-11
Also published as: CN112586269B

Abstract

The invention discloses a tree planting and righting adjusting device which comprises a fixed substrate and a plurality of connecting substrates, wherein the bottom of each connecting substrate is fixedly connected with a connecting column, each connecting substrate is vertically connected with the fixed substrate through the connecting column and is used for fixing parts with different heights on a trunk, one side of each connecting substrate is movably connected with an auxiliary plate, and the auxiliary plate is used for fixing the trunk and controlling the growth direction of branches; can fix the trunk position of co-altitude department through the concatenation of a plurality of connection base plates and fixed baseplate, the effect of accessory plate can change the growing direction of trunk or branch simultaneously, promotes the holistic pleasing to the eye of ornamental trees and gardens.

Description

Tree planting centralizing adjusting device

Technical Field

The invention relates to the technical field of garden tree straightening, in particular to a tree planting straightening adjusting device.

Background

Various gardens are increasingly built in cities for the purpose of beautifying the environment and providing leisure and entertainment places for people. Trees are important green plants essential in gardens.

Under the general condition, the root system of the newly planted trees in the garden needs to be righted due to the fact that the root system is not firm enough, and the trees are prevented from being blown down by strong wind or the growth direction of the newly planted trees deviates from the vertical direction. At present, most of the newly planted trees are supported and bound simply, the effect is not ideal, and after the ornamental trees grow, the trees can grow unattractive, the ornamental value is reduced, and the ornamental value of the garden is reduced.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a tree planting and straightening adjusting device, a trunk is fixed by arranging a fixing base plate and a lantern ring, and the growth direction of the trunk or branches is controlled by matching a connecting base plate and an auxiliary plate, so that the attractiveness of garden trees is improved.

In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:

the utility model provides an adjusting device is right in tree field planting, includes a fixed baseplate and a plurality of connection substrates, every connection substrate bottom equal fixedly connected with spliced pole, every connection substrate pass through the spliced pole and be connected perpendicularly with fixed substrate and be used for the position of fixed trunk high difference, fixed substrate be used for inserting the ground, fixed substrate one side fixedly connected with lantern ring, the lantern ring be used for the joint trunk, every connection substrate one side equal swing joint have an accessory plate, accessory plate bottom cup joint in one side of connecting the substrate through the pivot, the pivot can supply the rotation and the fixing of accessory plate, the accessory plate be used for fixed trunk and control the growth direction of branch.

Preferably, a metal sheet is arranged inside the auxiliary plate, one end of the metal sheet is arranged inside the auxiliary plate through a coil spring, the other end of the metal sheet is leaked out of the auxiliary plate and fixedly connected with a buckling plate, mushroom-shaped convex columns are fixedly connected to the top of the buckling plate at equal intervals, and clamping holes for clamping the mushroom-shaped convex columns are formed in the other side edge of the auxiliary plate.

Preferably, lantern ring top fixedly connected with be used for cup jointing the rampart of trunk, the lantern ring inside run through swing joint and be had the stripper plate, the stripper plate have the three line of all running through between lantern ring and the three stripper plate be isosceles triangle, every the stripper plate on all seted up the centre of a circle of sliding tray and the centre of a circle of the lantern ring be same point, the sliding tray in swing joint have the connection rope, the connection rope be used for three stripper plate along lantern ring centre of a circle synchronous motion when removing to the opposite side.

Preferably, the inner wall of the ring wall is movably connected with two symmetrical damping plates, the top and the bottom of each damping plate are symmetrically and fixedly connected with a sliding rod, the top of each damping plate is fixedly connected with an arc-shaped angle, the inner wall of the ring wall is provided with a sliding hole for the sliding rod to slide, and one side of each damping plate, which is close to the inner wall of the ring wall, is fixedly connected with a resistance spring. Preferably, the other side of the inner wall of the lantern ring is movably connected with a resisting plate, and the resisting plate is connected with the other side of the inner wall of the lantern ring through a spring.

Preferably, the equal fixedly connected with knob of fixed baseplate and connection substrate opposite side, the knob on set up the perforation that supplies to connect the rope and run through, the connection rope run through the perforation and perforate opposite side fixedly connected with fixture block, fixed baseplate and connection substrate opposite side inside all be equipped with the thread groove that supplies knob threaded connection, the knob rotate in the thread groove and be used for driving and connect rope lateral shifting.

Preferably, the top of the other side of the fixed substrate and the connecting substrate is fixedly connected with a sleeve pipe for splicing the connecting column, and the connecting column and the sleeve pipe are provided with slots.

Preferably, the fixed base plate bottom center fixedly connected with stake, fixed base plate bottom equidistance slope be connected with a plurality of supplementary stakes.

Preferably, the sliding groove is connected with a ball in a rolling manner, and the sliding groove is fixedly connected with a limiting arc plate for limiting the ball.

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

1) the tree fixing device is composed of a fixing base plate, a lantern ring, a ring wall, an extrusion plate, a rotating button, a connecting rope and a supporting plate, the tree fixing device is used for fixing the trees of the garden and can fix the trees according to trunks with different thicknesses, the application range is wide, and the tree fixing device is convenient to carry; when fixed trees, the fixed baseplate is fixed at the bottom of the ground at trunk edge, fixed baseplate and lantern ring fixed connection for the lantern ring surrounds the trunk, then rotatory knob drives and connects the rope and move to one side, connects the rope and drives three stripper plate and be close to the center of the lantern ring, until the extrusion trunk, supports the board simultaneously and extrudees the trunk edge that does not have the stripper plate, accomplishes the fixed to the trunk.

2) The tree growth direction control structure is convenient to carry, simple to splice and capable of improving the working efficiency of garden workers; the fixed baseplate is after fixed trunk, insert the connection substrate on fixed baseplate through the spliced pole, then the accessory plate on the connection substrate supports and leans on together with trunk or branch, then the direction of the rotatory accessory plate of pivot, make the direction of accessory plate unanimous with the growth direction of anticipated trunk or branch, then take out the sheetmetal in the accessory plate, wrap up the end of trunk or branch, and the sheetmetal is inside to leave the space and supplies trunk or branch to grow, thereby trunk or branch are when growing, can be because blockking of sheetmetal, change growth direction, with this growth direction of adjustment trunk or branch, wherein can connect the quantity of substrate according to the high selection of trunk or branch.

3) The damping plate on the ring wall is increased in contact area with the trunk in the vertical direction, so that the transverse resistance to the trunk is improved, and an auxiliary plate is matched; when the trunk top received the strong wind slope, the trunk top produced horizontal dynamics of dragging to the trunk bottom, leads to the not hard up of root, in order to avoid this kind of condition, the damping board of trunk bottom and the accessory plate at trunk top can provide the transverse resistance simultaneously to the top and the bottom of trunk, and the stability of trunk has further been consolidated in both collocation, avoids the not hard up of trunk root.

4) The pile inserting and assisting device is provided with the pile inserting and assisting pile, the pile inserting is used for fixing the fixing base plate at the bottom of the ground, the assisting pile is arranged obliquely, when the pile inserting and assisting pile is inserted into the bottom of the ground, the transverse resistance of the fixing base plate can be increased, the firmness degree of the fixing base plate at the bottom of the ground is increased, and the fixing tree is more stable.

5) The utility model discloses a spacing arc board, be provided with the sliding tray, the ball, spacing arc board, the centre of a circle of spacing arc board is the same point with the centre of a circle of the lantern ring, it supports to lean on with the ball to connect the sliding tray that the rope passed in the stripper plate to lean on to be connected, when connecting the rope atress and removing to the lantern ring centre of a circle, can drive the stripper plate and draw close to the centre of a circle simultaneously, with this extrusion trunk, and the centre of a circle of spacing arc board is the same point with the centre of a circle of the lantern ring, make the power of connecting the rope to three stripper plate all towards the lantern ring centre of a circle, make the utilization of connecting the rope to the power maximum efficiency of stripper plate, the ball makes the.

Drawings

FIG. 1 is a schematic plan view of a regulating device for centering and fixing trees according to the present invention;

FIG. 2 is a schematic top view of a fixing base plate of the regulating device for fixing and centering trees according to the present invention;

FIG. 3 is a perspective view of a fixing base plate of the regulating device for fixing and centering trees;

FIG. 4 is a schematic perspective view of an auxiliary plate of the regulating device for centering and fixing trees of the present invention;

FIG. 5 is a schematic perspective view of an auxiliary plate of the regulating device for centering and fixing trees of the present invention;

FIG. 6 is an enlarged view of the A position of the regulating device for the planting and righting of the trees of the invention;

FIG. 7 is a schematic perspective view of a circumferential wall of a regulating device for centering and fixing trees according to the present invention;

FIG. 8 is a schematic cross-sectional view of the side of the ring wall of the regulating device for centering and fixing trees of the invention.

In the figure: 1. fixing the substrate; 2. connecting columns; 3. a collar; 4. an annular wall; 5. a pressing plate; 6. a ball bearing; 7. a sliding groove; 8. sleeving a pipe; 9. a slot; 10. an auxiliary plate; 11. a buckle plate; 12. a rotating shaft; 13. connecting ropes; 14. a clamping block; 15. a rotation knob; 16. perforating; 17. a thread groove; 18. a resisting plate; 19. a spring; 20. mushroom-type posts; 21. a clamping hole; 22. a metal sheet 23, a limit arc plate; 24. pile inserting; 25. auxiliary piles; 26. connecting the substrates; 27. a damping plate; 28. a slide hole; 29. an arc angle; 30. a slide bar; 31. a resistance spring.

Detailed Description

For the convenience of understanding of those skilled in the art, the technical solution of the present invention will be further described in detail with reference to fig. 1 to 8.

Example one

A tree planting and righting adjusting device comprises a fixed base plate 1 and a plurality of connecting base plates 26, wherein the bottom of each connecting base plate 26 is fixedly connected with a connecting column 2, each connecting base plate 26 is vertically connected with the fixed base plate 1 through the connecting column 2 and used for fixing parts with different heights on a trunk, the fixed base plate 1 is used for being inserted into the ground, one side of the fixed base plate 1 is fixedly connected with a lantern ring 3, the lantern ring 3 is used for being clamped with the trunk, one side of each connecting base plate 26 is movably connected with an auxiliary plate 10, the bottom of the auxiliary plate 10 is sleeved on one side of the connecting base plate 26 through a rotating shaft 12, the rotating shaft 12 can be used for rotating and fixing the auxiliary plate 10, and the auxiliary plate 10 is;

a metal sheet 22 is arranged inside the auxiliary plate 10, one end of the metal sheet 22 is arranged inside the auxiliary plate 10 through a coil spring, the other end of the metal sheet leaks out of the auxiliary plate 10 and is fixedly connected with a buckling plate 11, mushroom-shaped convex columns 20 are fixedly connected to the top of the buckling plate 11 at equal intervals, and clamping holes 21 for clamping the mushroom-shaped convex columns 20 are formed in the other side edge of the auxiliary plate 10;

selecting a proper number of connecting substrates 26 according to the height of a trunk or a tree branch, fixing the trunk by fixing the fixing substrates 1 on the ground, fixing the connecting column 2 on the fixing substrates 1, vertically connecting the connecting substrates 26 with the fixing substrates 1, selecting a proper number of connecting substrates 26 according to the height of the trunk, vertically connecting the connecting substrates 26 on the fixing substrates 1 sequentially through the connecting column 2 until the height of the auxiliary plate 10 on the connecting substrates 26 is flush with the position of the trunk to be fixed, adjusting the angle of the auxiliary plate 10 through the rotating shaft 12, extracting the metal sheet 22 through the buckling plate 11, wrapping the trunk or the tree branch to be limited, ensuring that the height of the metal sheet 22 is higher than the tail end of the tree branch or the tree branch, controlling the growth direction of the tree branch or the tree branch and reducing the storage space of the spliced fixing substrates 1 and the connecting substrates 26, is convenient for the carrying and the use of the working personnel.

Example two

This embodiment and embodiment one same characteristic no longer redundantly, this embodiment and embodiment one different characterized in that, in this embodiment, 3 top fixedly connected with of lantern ring are used for cup jointing the rampart 4 of trunk, 3 inside swing joint that runs through of lantern ring has stripper plate 5, stripper plate 5 has three line of all running through between 3 and the three stripper plate 5 of lantern ring to be isosceles triangle, the centre of a circle that all seted up sliding tray 7 and sliding tray 7 on every stripper plate 5 is same point with the centre of a circle of lantern ring 3, swing joint connects rope 13 in the sliding tray 7, be used for three stripper plate 5 along 3 centre of a circle synchronous motion of lantern ring when connecting rope 13 and moving to the opposite side. In the arrangement, when the fixed base plate 1 is fixed on the ground near a trunk, the trunk is sleeved and limited by the lantern ring 3, then the connecting rope 13 is controlled to move towards the other side, so that the three extrusion plates 5 are tensioned and move towards the circle center of the lantern ring 3 at the same time, the trunk is extruded and fixed, the contact area between the lantern ring 3 and the trunk can be effectively increased by the annular wall 4 at the top of the lantern ring 3, and the fixing effect is increased;

the inner wall of the ring wall 4 is movably connected with two symmetrical damping plates 27, the top and the bottom of each damping plate 27 are symmetrically and fixedly connected with a slide bar 30, the top of each damping plate 27 is fixedly connected with an arc-shaped angle 29, the inner wall of the ring wall 4 is provided with a slide hole 28 for the slide bar 30 to slide, and one side of each damping plate 27 close to the inner wall of the ring wall 4 is fixedly connected with a damping spring 31. In the arrangement, when the top of the trunk is inclined by strong wind, the top of the trunk can drive the bottom of the trunk to incline, which easily causes the loosening of the tree root and the situation that the fixed substrate 1 can not fix the bottom of the trunk, to avoid this, when the top of the trunk passes through the ring wall 4, the two damping plates 27 press against the top of the trunk through the damping springs 31, since the arrangement of the resistance spring 31 enables the diameter between the two damping plates 27 to become smaller as the diameter of the trunk becomes larger, the damping plate 27 thus increases the contact area of the fixing base plate 1 to the bottom of the trunk in the vertical direction, simultaneously, the auxiliary plate 10 on the high-position connecting base plate 26 is matched, and the transverse damping is carried out on the bottom and the top of the trunk, the trunk has strong wind resistance, the condition that the tree root is easy to loosen is avoided, and the resistance spring 31 buffers the transverse swinging force of the trunk;

because the auxiliary board 10 is cambered and relatively smooth, when the wind direction faces the direction of the auxiliary board 10, the auxiliary board 10 can play a role of auxiliary support, and when the wind direction is other directions, the auxiliary board 10 can reduce the wind resistance, thereby realizing the effective protection of trees.

The other side of the inner wall of the lantern ring 3 is movably connected with a resisting plate 18, and the resisting plate 18 is connected with the other side of the inner wall of the lantern ring 3 through a spring 19. In the arrangement, when the trunk is positioned in the middle of the lantern ring 3, the three extrusion plates 5 extrude the trunk, the support plate 18 supports the trunk, and the force for extruding the trunk can be buffered through the spring 19, so that the trunk is prevented from being damaged, and the effect of fixing the trunk is further enhanced;

the equal fixedly connected with knob 15 of PMKD 1 and connection base plate 26 opposite side sets up the perforation 16 that supplies to connect rope 13 to run through on the knob 15, connects rope 13 to run through perforation 16 and perforation 16 opposite side fixedly connected with fixture block 14, and PMKD 1 and connection base plate 26 opposite side inside all is equipped with the thread groove 17 that supplies knob 15 threaded connection, and knob 15 is rotatory in thread groove 17 and is used for driving and connects rope 13 lateral shifting. In this setting, knob 15 is screwed out to thread groove 17 inside, then connects rope 13 and is driven to the opposite side removal to taut connection rope 13, the taut degree of rope 13 is connected through this kind of mode control in this process, and is simple convenient, makes things convenient for staff's operation.

In the traditional support rod righting mode, after the support rods are tied and fixed, the support rods cannot be adjusted along with the growth of the trunk, so that the operation is inconvenient, and adverse effects on the growth of trees can be brought; according to the tree planting and centering adjusting device disclosed by the invention, the tightness of the connecting rope 13 can be conveniently adjusted through the rotating button 15, the diameter of a tree can be conveniently adapted, the operation is convenient, and the influence on the normal growth of the tree is avoided. In addition, drive through operation knob 15 and connect rope 13 for a plurality of stripper plates 5 are linked, and it is labour saving and time saving more than prior art tie up a plurality of bracing pieces or adjust a plurality of bracing pieces in proper order.

EXAMPLE III

In this embodiment, the same features as those of the first embodiment are not repeated, and a different feature of this embodiment from those of the first embodiment is that in this embodiment, the top of the other side of the fixing substrate 1 and the connecting substrate 26 is fixedly connected with the socket pipe 8 for splicing the connecting column 2, and the connecting column 2 and the socket pipe 8 are both provided with the slots 9. In the arrangement, the sleeve pipe 8 and the connecting column 2 are sleeved together, and then the plug pin is inserted into the slot 9 to complete the splicing of the connecting substrate 26 and the fixed substrate 1, so that the device is simple and convenient;

the center of the bottom of the fixed base plate 1 is fixedly connected with an inserting pile 24, and the bottom of the fixed base plate 1 is obliquely connected with a plurality of auxiliary piles 25 at equal intervals. In the arrangement, when the inserting piles 24 are fixed at the ground bottom, the fixed substrate 1 is fixed, meanwhile, the auxiliary piles 25 are inserted into the ground bottom, the inclined auxiliary piles 25 and the ground bottom soil layer have transverse resistance, and the firmness degree of the fixed substrate 1 at the ground bottom is further enhanced;

the sliding groove 7 is connected with a ball 6 in a rolling manner, and the sliding groove 7 is fixedly connected with a limiting arc plate 23 for limiting the ball 6. In this setting, connect rope 13 and become rolling friction through setting up of ball 6 at the friction of the removal of sliding tray 7, reduce the resistance, it is more laborsaving convenient when rope 13 is connected in the pulling.

The trees needing field planting and righting are generally thin tree seedlings with trunks when transplanted in the garden, the diameter of the root part of the tree is not too large, and therefore the inner diameter of the ring wall 4 is set to be larger than the diameter of the root part of the tree, so that the lantern ring 3 can be conveniently installed.

A tree planting and righting adjusting device comprises the following working processes: when the fixing base plate 1 is used, when a tree is fixed, the fixing base plate 1 is fixed at the bottom of the edge of a trunk, before an ornamental tree is planted on the ground, the root of the tree firstly penetrates through the lantern ring 3, so that the trunk is surrounded by the lantern ring 3, one section of the lantern ring 3 is of a splicing structure and is fixed and detached through screws, when the tree grows to be required to detach the lantern ring 3, the lantern ring 3 is only detached from the trunk, then the rotary button 15 is rotated to drive the connecting rope 13 to move towards one side, the connecting rope 13 drives the three extrusion plates 5 to approach to the center of the lantern ring until the trunk is extruded, meanwhile, the support plate 18 extrudes the edge of the trunk without the extrusion plates 5 to complete the fixation of the trunk, after the trunk is fixed, the fixing base plate 1 selects a proper number of connecting base plates 24 according to the height of the trunk or branches, and the connecting base plates 24 are inserted into the, then the auxiliary plate 10 on the connecting substrate 24 is abutted against the trunk or the branch, then the direction of the auxiliary plate 10 is rotated through the rotating shaft 12, so that the direction of the auxiliary plate 10 is consistent with the expected growing direction of the trunk or the branch, then the metal sheet 22 in the auxiliary plate 10 is drawn out, the tail end of the trunk or the branch is wrapped, and because the height of the inner space of the metal sheet 22 is higher than that of the tail end of the trunk or the branch, a space is left inside the metal sheet 22 for the trunk or the branch to grow, so that the trunk or the branch can change the growing direction due to the blocking of the metal sheet 22 when growing, and the growing direction of the trunk or the branch is adjusted, therefore, the tree planting and righting adjusting device not only can fix and righting the trunk, but also can adjust the growing direction of the trunk and the branch, improve the appearance of the garden trees, increase the ornamental degree and is convenient, garden worker efficiency improves.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.

Claims

1. The utility model provides a adjusting device is right in tree field planting, includes a fixed base plate (1) and a plurality of connection base plate (26), its characterized in that: every equal fixedly connected with spliced pole (2) in connecting substrate (26) bottom, every connecting substrate (26) pass through spliced pole (2) and fixed substrate (1) and be connected perpendicularly and be used for the position of fixed trunk go up the difference in height, fixed substrate (1) be used for inserting the ground, fixed substrate (1) one side fixedly connected with lantern ring (3), lantern ring (3) be used for the joint trunk, every connecting substrate (26) one side all swing joint have accessory plate (10), accessory plate (10) bottom cup joint in the one side of connecting substrate (26) through pivot (12), pivot (12) can supply the rotation and the fixing of accessory plate (10), accessory plate (10) be used for fixed trunk and control the growth direction of branch.

2. The regulating device for the fixed planting and righting of the trees as claimed in claim 1, wherein: the auxiliary plate (10) internally mounted have sheetmetal (22), sheetmetal (22) one end install in the inside of auxiliary plate (10) through the coil spring and the other end leaks auxiliary plate (10) fixedly connected with buckle board (11), buckle board (11) top equidistance fixedly connected with mushroom type projection (20), auxiliary plate (10) the opposite side seted up supply the card hole (21) of mushroom type projection (20) joint.

3. The regulating device for the fixed planting and righting of the trees as claimed in claim 1, wherein: lantern ring (3) top fixedly connected with be used for cup jointing rampart (4) of trunk, lantern ring (3) inside run through swing joint and be equipped with stripper plate (5), stripper plate (5) have three all to run through the line between lantern ring (3) and three stripper plate (5) and be isosceles triangle, every stripper plate (5) on all set up the centre of a circle of sliding tray (7) and the centre of a circle of lantern ring (3) for the same point, sliding tray (7) in swing joint have connection rope (13), connection rope (13) be used for when removing to the opposite side three stripper plate (5) along lantern ring (3) centre of a circle synchronous motion.

4. The regulating device for the fixed planting and righting of the trees as claimed in claim 1, wherein: the inner wall swing joint of rampart (4) have damping plate (27) of two symmetries, every damping plate (27) top and bottom symmetry fixedly connected with slide bar (30) and top fixedly connected with arc angle (29), rampart (4) inner wall on set up and supply gliding slide opening (28) of slide bar (30), every damping plate (27) be close to one side fixedly connected with resistance spring (31) of rampart (4) inner wall.

5. The regulating device for the fixed planting and righting of the trees as claimed in claim 1, wherein: the other side of the inner wall of the lantern ring (3) is movably connected with a resisting plate (18), and the resisting plate (18) is connected with the other side of the inner wall of the lantern ring (3) through a spring (19).

6. The regulating device for the fixed planting and righting of the trees as claimed in claim 5, wherein: the utility model discloses a fixed baseplate (1) and connection base plate (26) the equal fixedly connected with knob (15) of opposite side, knob (15) on offer and supply to connect perforation (16) that rope (13) run through, connection rope (13) run through perforation (16) and perforation (16) opposite side fixedly connected with fixture block (14), fixed baseplate (1) and connection base plate (26) opposite side inside all be equipped with thread groove (17) that supply knob (15) threaded connection, knob (15) in thread groove (17) rotatory be used for driving and connect rope (13) lateral shifting.

7. The regulating device for the fixed planting and righting of the trees as claimed in claim 1, wherein: the fixing base plate (1) and the connecting base plate (26) are fixedly connected with sleeve pipes (8) used for splicing the connecting columns (2) at the top of the other sides, and the connecting columns (2) and the sleeve pipes (8) are provided with slots (9).

8. The regulating device for the fixed planting and righting of the trees as claimed in claim 1, wherein: the fixed baseplate (1) bottom center fixedly connected with pile inserting (24), the fixed baseplate (1) bottom equidistance slope be connected with a plurality of auxiliary piles (25).

9. The regulating device for the fixed planting and righting of the trees as claimed in claim 1, wherein: the ball bearing (6) is connected in the sliding groove (7) in a rolling manner, and the limiting arc plate (23) used for limiting the ball bearing (6) is fixedly connected in the sliding groove (7).