CN205494875U - Compact table tennis table - Google Patents

Abstract

The utility model provides a compact table tennis table belongs to mechanical technical field. It has been solved prior art and has had the problem that the suitability is not high. This compact table tennis table includes and still includes base, lifter and guiding mechanism by the table, and above -mentioned lifter upper shaft is to linking firmly on the table, the base is located and has the adjustment mechanism that can adjust the lifter height between table lower part and lifter lower extreme and the base, and foretell guiding mechanism is located between table and the base and the table can steady up and down translation under guiding mechanism's effect. This compact table tennis table structure level just suitability is high.

Description

Compact soldier pang ball table

Technical field

This utility model belongs to field of mechanical technique, relates to a kind of compact soldier pang ball table.

Background technology

Table tennis (pingpang) refers to table tennis.The length 274 of horizontal net it is separated with in centre Centimetre, carry out on the billiard table of wide by 152, high 76 centimetres.Bulb diameter 40.00 millimeters, weight Measure 2.40-2.53 gram, white or yellow, make with xylonite or plastics, have when beating " ping Pang " sound, therefore named.

Existing soldier pang platform is typically monolithic construction, say, that at common desk On a block is set.It can be seen that due between table leg and desk body can not folding storage, Therefore, it takes up room.

Chinese patent its publication number CN204671854U provides such a domestic intelligent Table tennis table, include table tennis table, hydraulic oil container, electric oil pump, flexible billiard table post, Check valve, electronic control pressure release valve, pump oil button and pressure relief press button, table tennis table central authorities are provided with Hydraulic oil container, hydraulic oil container bottom is provided with electric oil pump, table tennis table corner is equipped with and stretches Contracting billiard table post, electric oil pump is connected with flexible billiard table post by check valve, flexible billiard table post It is connected with fuel tank by electronic control pressure release valve, on the right side of table tennis table, is provided with pump oil button and pressure release Button, pump oil button is connected with electric oil pump, and pressure relief press button and electronic control pressure release valve connect.

It can be seen that above-mentioned soldier pang Delta is to not taking up space, be applicable to parlor, use Effect easily.But, the connection between desk body and table leg still also exists and takes up room Problem.

And, above-mentioned soldier pang platform structure is the most complicated, causes its structure the compactest and becomes This is higher.

Summary of the invention

The purpose of this utility model is the problems referred to above existed for prior art, it is provided that one Kind of compact conformation and high compact soldier pang the ball table of the suitability.

The purpose of this utility model can be realized by following technical proposal:

A kind of compact soldier pang ball table, including table, it is characterised in that also include base, Elevating lever and guiding mechanism, above-mentioned elevating lever top axial is connected on table, the described end Seat is positioned at table bottom and has between elevating lever lower end and base and can regulate elevating lever height Governor motion, above-mentioned guiding mechanism is between table and base and at guiding mechanism Effect under table can stable upper and lower translation.

Can phase para-position between stable regulation table and base under the effect of governor motion Put, thus adjust the height of table, it is adaptable to the user of various different building shape.

Under the effect of guiding mechanism, it is avoided that desk body rotates relative to base, improves it and make Use stability.

In above-mentioned compact soldier pang ball table, described governor motion includes adjustment barrel, Above-mentioned adjustment barrel is tubular and adjustment barrel lower end is connected on base, in described adjustment barrel also Axially it is fixed with regulation axle, described regulation axle is fixed with gear, above-mentioned elevating lever sidepiece Being fixed with tooth bar, said gear is meshed with tooth bar.

During rotating gear, owing to tooth bar is connected on adjusting rod, therefore, adjust Pole can be along with moving up and down.

Certainly, adjustment barrel has inserted link, adjusting rod axially has along it some Hole, location, inserted link just can make to be formed between adjusting rod and adjustment barrel after being inserted at hole, location to determine Position.

In above-mentioned compact soldier pang ball table, the end of described regulation axle has handwheel.

Regulation axle can easily be rotated by handwheel, thus stabilized zone moving gear rotates.

In above-mentioned compact soldier pang ball table, also have ringwise in described adjustment barrel Fairlead, above-mentioned fairlead is enclosed within elevating lever.

Under the effect of fairlead, it is avoided that elevating lever directly contacts with adjustment barrel.

In above-mentioned compact soldier pang ball table, the quantity of described fairlead is two, institute Stating and also have tubular spacer between two fairleads, above-mentioned two fairlead supports respectively Lean against at the upper and lower end parts of spacer.

In above-mentioned compact soldier pang ball table, the outside of described fairlead and spacer is all supported Lean against inside adjustment barrel.

In above-mentioned compact soldier pang ball table, the internal diameter of described spacer is more than in fairlead Footpath.

In above-mentioned compact soldier pang ball table, described gear is positioned at inside spacer to be located.

Fairlead stably contacts with elevating lever, meanwhile, can dodge elevating lever, make at spacer The gear that must be positioned at spacer can stable being meshed with tooth bar.

In above-mentioned compact soldier pang ball table, described adjustment barrel upper end has end cap, on State end cap to be resisted against on fairlead.

Set and stable being positioned in adjustment barrel of spacer it is directed under the effect of end cap.

In above-mentioned compact soldier pang ball table, the edge of described end cap has protrusion Button edge, described button is along being fastened on adjustment barrel upper end.

The stable connexon adjustment barrel upper end of end cap can be made by buttonhole.

In above-mentioned compact soldier pang ball table, have between described regulation axle and adjustment barrel Have and can have the one-way mechanism that can make the unidirectional continuous rotation of regulation axle.

Effect in check configuration is lowered nodal axisn and can be rotated continuously, it is to avoid when promoting table Table can glide suddenly.

In above-mentioned compact soldier pang ball table, described one-way mechanism includes being connected in tune Ratchet on nodal axisn and be hinged on the ratchet outside adjustment barrel, described ratchet and adjustment barrel it Between also there is unidirectional spring, under the elastic force effect of unidirectional spring, ratchet has and is embedded in ratchet On trend.

Under the elastic force effect of unidirectional spring, ratchet has the trend being embedded on ratchet all the time.

In above-mentioned compact soldier pang ball table, described adjustment barrel also has and can make spine Pawl and the clutch structure of ratchet clutch.

During table normal hoisting, clutch structure keeps merging phase.When needing to move down table from Conjunction structure remains off.

In above-mentioned compact soldier pang ball table, described clutch structure includes pull bar, draws Rope and card edge, the quantity on above-mentioned card edge be two and its be connected in outside adjustment barrel, above-mentioned Pull bar the inner is hinged in adjustment barrel, and described pull bar can block in office after its hinged place swings Anticipating at a card edge, the two ends of described stay cord are respectively fixedly connected with in the middle part of pull bar and in the middle part of ratchet Place.

During its hinged place rotating tension bar, by the pull bar stretchy ratchet swung, Ratchet after being pulled departs from ratchet, and now, table can stably move down.

Certainly, it is positioned by the pull bar after swing by card edge.Because, this clutch Mechanism has merging and disconnects two states, and therefore, the quantity on card edge is two, respectively Pull bar during above two state is positioned.

In above-mentioned compact soldier pang ball table, described card is along being connected in adjustment barrel edge Place.

In above-mentioned compact soldier pang ball table, described card is along including the bar segment one in straight section With bar segment two, above-mentioned bar segment one is inner to be connected with adjustment barrel, above-mentioned bar segment two the inner and bar Section one outer end is fixedly connected with, and above-mentioned bar segment one forms L-shaped card edge with bar segment two.

Such structure comparison material saving, and pull bar stable can be overlapped on Ka Yanshang.

In above-mentioned compact soldier pang ball table, described card is along having elasticity.

In above-mentioned compact soldier pang ball table, described card edge is plastic material.

In above-mentioned compact soldier pang ball table, described card edge is elastic sheet metal.

Have resilient card along the simplicity of operation that can improve clutch structure, say, that After applying external force pulls pull bar, block under external force and make pull bar get over smoothly along deformation energy Cross card edge.Certainly, the stop pull bar that card edge can be stable under not applying External Force Acting.

In above-mentioned compact soldier pang ball table, described end cap includes lid in the form of annular discs, Above-mentioned button edge is positioned at the edge of lid, thickness is lid thickness the 25 of described button edge Times.

Owing to the thickness on button edge is thicker than lid thickness, therefore, the center of gravity of whole end cap is concentrated Button along at so that whole end cap stable be fastened on adjustment barrel upper end, it is to avoid end cap Depart from adjustment barrel.

In above-mentioned compact soldier pang ball table, described lid and button are tied along for integral type Structure.

The end cap of integral structure passes through founder's artistic skill one-shot forming.

In above-mentioned compact soldier pang ball table, described end cap is cast iron materials.

In above-mentioned compact soldier pang ball table, the thickness on described button edge is lid thickness Twice.

In above-mentioned compact soldier pang ball table, described button has the most recessed along inner side Seal receptacle, there is at described seal receptacle sealing ring and sealing ring be pressed on buckle along and tune Between joint cylinder.

Under the effect of seal receptacle, it is avoided that the foreign material in the external world enter in adjustment barrel.

In above-mentioned compact soldier pang ball table, described button is along threadeding with adjustment barrel.

It is threaded connection the stable connection that can increase between end cap and adjustment barrel further Property.

In above-mentioned compact soldier pang ball table, have between described lid and adjustment barrel upper end Pad and pad is had to be pressed between lid and adjustment barrel.

In above-mentioned compact soldier pang ball table, described pad is rubber sheet gasket.

Owing to pad is flexible, it is avoided that under the effect of pad in end cap and adjustment barrel End directly contact.

In above-mentioned compact soldier pang ball table, described guiding mechanism includes tubular leading To cylinder with in shaft-like guide post, above-mentioned guide post upper end is connected on table, above-mentioned leads Being connected on base to cylinder lower end, described guide cylinder upper end is inserted in above-mentioned guide post lower end.

Will not be relative to base during under the guide effect of guide cylinder, table moves up and down Rotate.

In above-mentioned compact soldier pang ball table, also there is in described guide cylinder spring, The two ends of spring are pushed up respectively and are pressed on guide post lower end and base.

Power during table lifting can be reduced under the elastic force effect of spring, facilitate and move on table Regulation.

In above-mentioned compact soldier pang ball table, in described guide cylinder, there is lubricant grease, Above-mentioned spring is immersed in lubricant grease.

The friction resistance between guide post and guide cylinder can be reduced under the effect of lubricant grease Power.

In above-mentioned compact soldier pang ball table, above-mentioned guide cylinder and guide post form one Group pilot unit, the quantity of described pilot unit is two and two pilot unit positions respectively At the both sides of governor motion.

Multiple pilot units can stable increase guiding steady qualitative.

In above-mentioned compact soldier pang ball table, described guide post is prism-shaped, above-mentioned leads Match with guide post inside cylinder.

Guide post and the cooperation of corresponding guide cylinder in Pedicellus et Pericarpium Trapae column are avoided that guide post turns Dynamic, certainly, the most also allowing for table cannot rotate.

In above-mentioned compact soldier pang ball table, also have between described guide post and guide cylinder Having location structure, it is fixed to be formed between guide post and guide cylinder under the effect of location structure Position.

Location can be formed between guide post and guide cylinder under the effect of location structure so that Position after table regulation can be fixed.

In above-mentioned compact soldier pang ball table, described location structure is guide post sidepiece Bayonet socket recessed inside recessed positioning recess and guide cylinder, has in above-mentioned positioning recess Location spring and locating ball, under the elastic force effect of location spring, locating ball has and stretches Go out positioning recess and embed the trend at bayonet socket.

Under the elastic force effect of location spring spring, locating ball is embedded at bayonet socket, thus surely Fixed realization location.

In above-mentioned compact soldier pang ball table, the quantity of described bayonet socket is several and card The axial uniform setting of opening's edge guide cylinder.

In above-mentioned compact soldier pang ball table, described locating ball is spherical shape, on State inside the most recessed guide cylinder of bayonet socket.

In above-mentioned compact soldier pang ball table, described guiding mechanism includes tubular leading To cylinder with in shaft-like guide post, above-mentioned guide post upper end is connected on table, above-mentioned leads Being connected on base to cylinder lower end, described guide cylinder upper end is inserted in above-mentioned guide post lower end, Described guide post lower end connects location gear, has resilient card inside described guide cylinder Part and fastener can embed at the gear of location.

Shackle member with location gear match also can reach location effect.

In above-mentioned compact soldier pang ball table, have recessed inside described guide cylinder Card piece bores, has clamping spring and shackle member in described card piece bores, at the bullet of clamping spring Under power effect shackle member have stretch out card piece bores and be embedded in location adjacent two teeth of gear between Trend.

In above-mentioned compact soldier pang ball table, described shackle member is elongated rod shape, described Shackle member outer end has the Access Division in tip-angled shape, and it is inner that above-mentioned spring is resisted against shackle member Place.

What the Access Division of tip-angled shape can be more prone to is connected to position on gear.

In above-mentioned compact soldier pang ball table, described location gear is hinged on guide post.

The gear rotated is more prone to position mutually with shackle member.

In above-mentioned compact soldier pang ball table, above-mentioned card piece bores, shackle member and clamping Spring forms one group of clamping unit, and the quantity of described clamping unit is several and edge guiding The axial uniform setting of cylinder.

In above-mentioned compact soldier pang ball table, the both sides of described guide cylinder are respectively provided with clamping Unit and two group clamping unit lay respectively at the both sides positioning gear.

Compared with prior art, this compact soldier pang ball table is due to the effect at governor motion Under can move up and down smoothly, meanwhile, table can be made under the effect of guiding mechanism stable Moving up and down, it regulates stable action, has the highest practical value.

Meanwhile, also it is avoided that in upper shifting table process by one-way mechanism during regulation Middle table glides, and its stability is higher, and regulates the easiest.

Accompanying drawing explanation

Fig. 1 is the main TV structure schematic diagram of this compact soldier pang ball table.

Fig. 2 is the plan structure schematic diagram in this compact soldier pang ball table at guide cylinder.

Fig. 3 is the main TV structure schematic diagram in this compact soldier pang ball table at guide cylinder.

Fig. 4 is the contour structures schematic diagram of guide cylinder in this compact soldier pang ball table.

Fig. 5 is the structural representation of guiding mechanism in this compact soldier pang ball table.

Fig. 6 is the structural representation of this compact soldier pang ball another guiding mechanism of table.

In figure, 1, table；2, base；3, elevating lever；4, adjustment barrel；6, regulation Axle；6a, gear；7, tooth bar；8, handwheel；9, fairlead；10, spacer；11、 End cap；11a, lid；11b, button edge；12, ratchet；13, ratchet；14, unidirectional Spring；15, pull bar；16, stay cord；17, card edge；17a, bar segment one；17b, bar Section two；18, sealing ring；19, pad；20, spring；22, guide post；22a, fixed Position recess；23, guide cylinder；23a, bayonet socket；23b, card piece bores；24, location spring； 25, locating ball；26, location gear；27, clamping spring；28, shackle member；28a、 Access Division.

Detailed description of the invention

As shown in Fig. 1 and Fig. 2 and Fig. 3 and Fig. 4 and Fig. 5 and Fig. 6, this compact soldier Pang ball table includes table 1, also includes base 2, elevating lever 3 and guiding mechanism, above-mentioned liter Fall bar 3 top axial be connected on table 1, described base 2 be positioned at table 1 bottom and There is between elevating lever 3 lower end and base 2 governor motion that can regulate elevating lever 3 height, Above-mentioned guiding mechanism is between table 1 and base 2 and under the effect of guiding mechanism Table 1 can stable upper and lower translation.

Described governor motion includes adjustment barrel 4, and above-mentioned adjustment barrel 4 is in tubular and regulation Cylinder 4 lower ends are connected on base, and described adjustment barrel 4 is the most axially fixed with regulation axle 6, Being fixed with gear 6a on described regulation axle 6, above-mentioned elevating lever 3 sidepiece is fixed with tooth bar 7, Said gear 6a is meshed with tooth bar 7.

The end of described regulation axle 6 has handwheel 8.

Also having fairlead 9 ringwise in described adjustment barrel 4, above-mentioned fairlead 9 overlaps On elevating lever 3.

The quantity of described fairlead 9 is two, also has between said two fairlead 9 Tubular spacer 10, it is upper and lower that above-mentioned two fairlead 9 bears against at spacer 10 End.

The outside of described fairlead 9 and spacer 10 is all resisted against inside adjustment barrel 4.

The internal diameter of described spacer 10 is more than fairlead 9 internal diameter.

Described gear 6a is positioned at inside spacer 10 and locates.

Described adjustment barrel 4 upper end has end cap 11, and above-mentioned end cap 11 is resisted against fairlead 9 On.

The edge of described end cap 11 has the button of protrusion along 11b, and described button is along 11b It is fastened on adjustment barrel 4 upper end.

Having between described regulation axle 6 and adjustment barrel 4 to have to make regulation axle 6 single To the one-way mechanism rotated continuously.

Described one-way mechanism includes the ratchet 12 being connected on regulation axle 6 and is hinged on tune Ratchet 13 outside joint cylinder 4, also has unidirectional between described ratchet 13 and adjustment barrel 4 Spring 14, under the elastic force effect of unidirectional spring 14, ratchet 13 has and is embedded in ratchet 12 On trend.

Also there is in described adjustment barrel 4 clutch that can make ratchet 13 with ratchet 12 clutch Structure.

Described clutch structure includes pull bar 15, stay cord 16 and blocks along 17, above-mentioned card edge The quantity of 17 be two and its be connected in outside adjustment barrel 4, the inner hinge of above-mentioned pull bar 15 Being connected in adjustment barrel 4, described pull bar 15 can be stuck in any one after its hinged place swings Blocking at 17, the two ends of described stay cord 16 are respectively fixedly connected with in the middle part of pull bar 15 and ratchet 13 center.

Described card is connected in adjustment barrel 4 edge along 17.

Described card includes bar segment one 17a in straight section and bar segment two 17b, above-mentioned bar along 17 Section one 17a is inner to be connected with adjustment barrel 4, above-mentioned bar segment two 17b the inner and bar segment one 17a Outer end is fixedly connected with, and above-mentioned bar segment one 17a and bar segment two 17b forms L-shaped card along 17.

Described card has elasticity along 17.

Described card is plastic material along 17.According to practical situation, described card is along 17 Also it is feasible for elastic sheet metal.

Described end cap 11 includes lid 11a in the form of annular discs, and above-mentioned button is positioned at lid along 11b The edge of body 11a, described button is along thickness is lid 11a thickness the 25 of 11b Times.

Described lid 11a and button are integral type structure along 11b.

Described end cap 11 is cast iron materials.

Described button is along the twice that thickness is lid 11a thickness of 11b.

Described button has the most recessed seal receptacle inside 11, has at described seal receptacle Have sealing ring 18 and sealing ring 18 to be pressed on to buckle along between 11 and adjustment barrel 4.

Described button is threadeded along 11 with adjustment barrel 4.

There is between described lid 11a and adjustment barrel 4 upper end pad 19 and pad 19 quilt It is pressed between lid 11a and adjustment barrel 4.

Described pad 11 is rubber sheet gasket.

Described guiding mechanism includes tubular guide cylinder 23 and in shaft-like guide post 22, Above-mentioned guide post 22 upper end is connected on table 1, and above-mentioned guide cylinder 23 lower end is connected in On base 2, described guide cylinder 23 upper end is inserted in above-mentioned guide post 22 lower end.

Also having spring 20 in described guide cylinder 23, pressure is pushed up at the two ends of spring 20 respectively On guide post 22 lower end and base 2.

Having lubricant grease in described guide cylinder 23, above-mentioned spring 20 is immersed in lubrication In oils and fats.

Above-mentioned guide cylinder 23 and guide post 22 form one group of pilot unit, described guiding The quantity of unit is two and two pilot units lay respectively at the both sides of governor motion.

Described guide post 22 is in prism-shaped, with guide post 22 inside above-mentioned guide cylinder 23 Match.

Between described guide post 22 and guide cylinder 23, also there is location structure, at location knot Location can be formed between guide post 22 and guide cylinder 23 under the effect of structure.

Described location structure is the recessed positioning recess 22a of guide post 22 sidepiece and guiding Bayonet socket 23a recessed inside cylinder 23, has location spring 24 in above-mentioned positioning recess 22a With locating ball 25, under the elastic force effect of location spring 24, locating ball 25 has and stretches Go out positioning recess 22a and embed the trend at bayonet socket 23a.

The quantity of described bayonet socket 23a be several and bayonet socket 23a along guide cylinder 23 the most all Cloth is arranged.

Described locating ball 25 in spherical shape, the above-mentioned the most recessed guiding of bayonet socket 23a Inside cylinder 23.

Alternatively scheme, described guiding mechanism includes tubular guide cylinder 23 With in shaft-like guide post 22, above-mentioned guide post 22 upper end is connected on table 1, on Stating guide cylinder 23 lower end to be connected on base 2, above-mentioned guide post 22 lower end is inserted described Guide cylinder 23 upper end, described guide post 22 lower end connects location gear 26, described Have resilient fastener inside guide cylinder 23 and fastener can embed at the gear 26 of location.

There is inside described guide cylinder 23 recessed card piece bores 23b, described card piece bores 23b Inside there is clamping spring 27 and shackle member 28, block under the elastic force effect of clamping spring 27 Fitting 28 have stretch out card piece bores 23b and be embedded in location adjacent two teeth of gear 26 between Trend.

Described shackle member 28 is in elongated rod shape, and described shackle member 28 outer end has in wedge angle The Access Division 28a of shape, above-mentioned spring 20 is resisted against at shackle member 28 the inner.

Described location gear 26 is hinged on guide post 22.

Above-mentioned card piece bores 23b, shackle member 28 and clamping spring 27 form one group of clamping Unit, the quantity of described clamping unit is several and axially all lays along guide cylinder 23 Put.

The both sides of described guide cylinder 23 are respectively provided with clamping unit and two group clamping unit divide It is not positioned at the both sides of location gear 26.

Can relative between stable regulation table 1 and base 2 under the effect of governor motion Position, thus adjust the height of table 1, it is adaptable to the user of various different building shape.

Under the effect of guiding mechanism, it is avoided that desk body 1 rotates relative to base 2, improves Its stability in use.

Claims (10)

1. compact soldier pang a ball table, including table, it is characterised in that also include the end Seat, elevating lever and guiding mechanism, above-mentioned elevating lever top axial is connected on table, institute State base in table bottom and to have between elevating lever lower end and base and can regulate elevating lever The governor motion of height, above-mentioned guiding mechanism is between table and base and is guiding Table energy upper and lower translation smoothly under the effect of mechanism, described governor motion includes regulation Cylinder, above-mentioned adjustment barrel is tubular and adjustment barrel lower end is connected on base, described adjustment barrel On be the most axially fixed with regulation axle, described regulation axle is fixed with gear, above-mentioned elevating lever Sidepiece is fixed with tooth bar, and said gear is meshed with tooth bar, described guiding mechanism include in The guide cylinder of tubular and in shaft-like guide post, above-mentioned guide post upper end is connected on table, Above-mentioned guide cylinder lower end is connected on base, and described guide cylinder is inserted in above-mentioned guide post lower end Upper end, described guide post lower end connects location gear, has inside described guide cylinder Elastic fastener and fastener can embed at the gear of location.

Compact soldier the most according to claim 1 pang ball table, it is characterised in that institute There is inside the guide cylinder stated recessed card piece bores, in described card piece bores, there is clamping spring And shackle member, under the elastic force effect of clamping spring, shackle member has and stretches out card piece bores embedding Trend between adjacent two teeth of gear of location.

Compact soldier the most according to claim 2 pang ball table, it is characterised in that institute The shackle member stated is elongated rod shape, and described shackle member outer end has the Access Division in tip-angled shape, Above-mentioned spring is resisted against at shackle member the inner.

Compact soldier the most according to claim 3 pang ball table, it is characterised in that institute State location gear to be hinged on guide post.

Compact soldier the most according to claim 4 pang ball table, it is characterised in that on Card piece bores, shackle member and the clamping spring stated forms one group of clamping unit, described card order Unit quantity be several and along the axial uniform setting of guide cylinder.

Compact soldier the most according to claim 5 pang ball table, it is characterised in that institute State the both sides of guide cylinder and be respectively provided with clamping unit and two group clamping unit lay respectively at location The both sides of gear.

Compact soldier the most according to claim 1 pang ball table, it is characterised in that institute The end stating regulation axle has handwheel.

Compact soldier the most according to claim 7 pang ball table, it is characterised in that institute Also having fairlead ringwise in stating adjustment barrel, above-mentioned fairlead is enclosed within elevating lever.

Compact soldier the most according to claim 8 pang ball table, it is characterised in that institute The quantity stating fairlead is two, also have between said two fairlead tubular every Set, above-mentioned two fairlead bears against at the upper and lower end parts of spacer.

Compact soldier the most according to claim 9 pang ball table, it is characterised in that The outside of described fairlead and spacer is all resisted against inside adjustment barrel.