CN206754322U - The column type gear of bicycle speed-varying unit - Google Patents

Abstract

The column type gear from a kind of bicycle speed-varying unit is the utility model is related to, as substantially including carrying the shaft shoulder of the right step surface for axially position, being co-axially located on the right side of the shaft shoulder and being used for the bearing cylinder shaft body of bearing set, be co-axially located at bearing cylinder shaft body right side and for the splined shaft coordinated with the fluted disc internal splined hole of change-speed gearing assembly, the left side male half coupling being co-axially located on the left of the shaft shoulder and for being sleeved on back axle and through the centre bore of left side male half coupling, the shaft shoulder, bearing cylinder shaft body and splined shaft；It is the utility model is designed reasonably, compact-sized and easy to use.

Description

The column type gear of bicycle speed-varying unit

Technical field

It the utility model is related to the column type gear of bicycle speed-varying unit.

Background technology

At present, column type gear is called gear shaft, and it realizes the effect of the transmission of power and support, belongs to consumable accessory, But existing gear shaft problems with, it is inconvenient to change dismounting after 1. bearing damages, and post is easily damaged when bearing is dismantled The axle of type gear is cylindrical；2., it is necessary to which whole gear shaft is changed after gear generation broken teeth phenomenon, cost is high, and does not overload Protection device, it is dangerous.

Utility model content

Technical problem to be solved in the utility model is generally speaking to provide a kind of column type gear of bicycle speed-varying unit； The technical problem and acquirement beneficial effect solved in detail content in aftermentioned content and combination embodiment is specifically retouched State.

To solve the above problems, technical solution adopted in the utility model is：

A kind of column type gear of bicycle speed-varying unit, include carrying the axle of the right step surface for axially position as basic Shoulder, the bearing cylinder shaft body on the right side of the shaft shoulder and for bearing set is co-axially located at, is co-axially located on the right side of bearing cylinder shaft body and uses In with the splined shaft of the fluted disc internal splined hole of change-speed gearing assembly cooperation, the left side male half coupling being co-axially located on the left of the shaft shoulder, with And for being sleeved on back axle and through the centre bore of left side male half coupling, the shaft shoulder, bearing cylinder shaft body and splined shaft；

Present invention point is also to include noting butter passage, and the right-hand member import of note butter passage is arranged on splined shaft On right side, after note butter passage passes through inside splined shaft and bearing cylinder shaft body, the left end of note butter passage is exported from bearing Expose on the lateral wall of cylinder shaft body, the left end of note butter passage is exported for the gap between bearing cylinder shaft body and bearing to be installed Butter is filled, the right-hand member import of note butter passage is provided with the screw thread for installing filling grease nipple, usually blocked with plug, Play sealing and dustproof effect.

When need to change bearing and bearing removal do not get off when, remove blocking, grease nipple screwed in, pass through jack Or grease gun adds butter, butter enters the gap between bearing cylinder shaft body and bearing to be installed along butter passage of showwing loving care for, plays profit Sliding effect, while bearing inner race is strutted, so as to dismantle bearing easily and fast, without damaging bearing cylinder shaft body.

The inner bolt hole female for the connection screw thread back of the body is provided with endoporus on the right side of centre bore, is provided with centre bore right output port The positioning inner stopper of female step shaft clearance cooperation is carried on the back with screw thread, so as to improve its assembly precision, avoids the screw thread back of the body female because different Axle and cause eccentric wear, reduce noise.

Right step surface and bearing cylinder shaft body junction are provided with grinding undercut, rational technology.

Bearing cylinder shaft body is provided with the annular slot for placing end ring, it is reasonable in design.

Gear ring is set with the male half coupling of left side, gear ring is fixedly connected with left side male half coupling by junction of the edges of two sheets of paper screw/pin, is realized Split connects, so as to reduce manufacture and replacement cost.

The shear strength factor of junction of the edges of two sheets of paper screw/pin is less than the strength factor of the broken teeth of gear ring, and the value can pass through limited number of time Experiment is calculated by handbook, can just there is aluminium or brass or nylon or polytetrafluoroethylene (PTFE) material.

When the unexpected stress of gear or meet more than its fracture coefficient when, due to junction of the edges of two sheets of paper screw/pin be present, therefore give part First it is sheared and fractures, so as to protect the flank of tooth, plays safeguard protection effect.

The beneficial effects of the utility model not limited to this describes, in order to preferably readily appreciate, in embodiment portion Divide and carried out more preferably detailed description.

Brief description of the drawings

Fig. 1 is the three-dimensional structural representation of the utility model.

Fig. 2 is the structural representation inside the utility model.

Wherein：1st, the shaft shoulder；2nd, centre bore；3rd, right step surface；4th, bearing cylinder shaft body；5th, grinding undercut；6th, annular slot；7th, flower Key axle；8th, butter passage is noted；9th, inner bolt hole；10th, inner stopper is positioned；11st, left side male half coupling；12nd, gear ring；13rd, junction of the edges of two sheets of paper screw/ Pin.

Embodiment

As shown in Figure 1-2, the column type gear of the bicycle speed-varying unit of the present embodiment, include carrying for axially as basic The shaft shoulder 1 of the right step surface 3 of positioning, it is co-axially located at the right side of the shaft shoulder 1 and is used for the bearing cylinder shaft body 4 of bearing set, coaxially sets Put on the right side of bearing cylinder shaft body 4 and for the splined shaft 7 with the cooperation of the fluted disc internal splined hole of change-speed gearing assembly, be co-axially located at The left side male half coupling 11 in the left side of the shaft shoulder 1 and for being sleeved on back axle and through left side male half coupling 11, the shaft shoulder 1, bearing circle The centre bore 2 of axis body 4 and splined shaft 7；

Present invention point is also to include noting butter passage 8, and the right-hand member import of note butter passage 8 is arranged on splined shaft On 7 right side, note butter passage 8 is after splined shaft 7 and the inside of bearing cylinder shaft body 4 pass through, the left end outlet of note butter passage 8 Expose from the lateral wall of bearing cylinder shaft body 4, the left end of note butter passage 8 is exported for bearing cylinder shaft body 4 and bearing to be installed Between gap filling butter, note butter passage 8 right-hand member import be provided with for install filling grease nipple screw thread, usually Blocked with plug, play sealing and dustproof effect.

When need to change bearing and bearing removal do not get off when, remove blocking, grease nipple screwed in, pass through jack Or grease gun adds butter, the gap that butter enters between bearing cylinder shaft body 4 and bearing to be installed along butter passage 8 of showwing loving care for, plays Lubrication, while bearing inner race is strutted, so as to dismantle bearing easily and fast, without damaging bearing cylinder shaft body 4.

It is provided with the right side endoporus of centre bore 2 and carries on the back mother for connection screw thread（Dotted line represents in figure）Inner bolt hole 9, in The right output port of heart hole 2 is provided with the positioning inner stopper 10 carried on the back female step shaft clearance with screw thread and coordinated, and so as to improve its assembly precision, keeps away Exempt from screw thread back of the body mother and cause eccentric wear because of not coaxial, reduce noise.

Right step surface 3 and the junction of bearing cylinder shaft body 4 are provided with grinding undercut 5, rational technology.

Bearing cylinder shaft body 4 is provided with the annular slot 6 for placing end ring, it is reasonable in design.

Gear ring 12 is set with left side male half coupling 11, gear ring 12 is solid by junction of the edges of two sheets of paper screw/pin 13 with left side male half coupling 11 Fixed connection, realize that split connects, so as to reduce manufacture and replacement cost.

The shear strength factor of junction of the edges of two sheets of paper screw/pin 13 is less than the strength factor of the broken teeth of gear ring 12, and the value can be by having Limit time experiment is calculated by handbook, can just there is aluminium or brass or nylon or polytetrafluoroethylene (PTFE) material.

When the unexpected stress of gear or meet more than its fracture coefficient when, due to junction of the edges of two sheets of paper screw/pin 13 be present, therefore give portion Part is first sheared and fractureed, and so as to protect the flank of tooth, plays safeguard protection effect.

The utility model is designed reasonably, cost are cheap, durable, safe and reliable, simple to operate, time saving and energy saving, saving It is fund, compact-sized and easy to use.

The utility model, which fully describes, to be disclosed in order to more clear, and is just no longer enumerated for prior art.

Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that： It can still be modified to the technical scheme described in previous embodiment, or which part technical characteristic is equal Replace；It is obvious that multiple technical schemes of the present utility model, which are combined, as those skilled in the art.And these Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical scheme Enclose.

Claims (6)

1. a kind of column type gear of bicycle speed-varying unit, including the shaft shoulder (1) with the right step surface (3) for axially position, It is co-axially located at the bearing cylinder shaft body (4) on the right side of the shaft shoulder (1) and for bearing set, is co-axially located at bearing cylinder shaft body (4) right side Side and it is used for and splined shaft (7) that the fluted disc internal splined hole of change-speed gearing assembly coordinates, the left side that is co-axially located on the left of the shaft shoulder (1) Side male half coupling (11) and for be sleeved on back axle and through left side male half coupling (11), the shaft shoulder (1), bearing cylinder shaft body (4) With the centre bore (2) of splined shaft (7)；It is characterized in that：Also include note butter passage (8), the right-hand member import of note butter passage (8) It is arranged on the right side of splined shaft (7), after note butter passage (8) passes through inside splined shaft (7) and bearing cylinder shaft body (4), The left end outlet of note butter passage (8) is exposed from the lateral wall of bearing cylinder shaft body (4), the left end outlet of note butter passage (8) For filling butter to the gap between bearing cylinder shaft body (4) and bearing to be installed, set in the right-hand member import of note butter passage (8) There is the screw thread for installing filling grease nipple.

2. the column type gear of bicycle speed-varying unit according to claim 1, it is characterised in that:In centre bore (2) right side The inner bolt hole (9) female for the connection screw thread back of the body is provided with hole, is provided with centre bore (2) right output port and carries on the back female Step Shaft with screw thread The positioning inner stopper (10) that gap coordinates.

3. the column type gear of bicycle speed-varying unit according to claim 1, it is characterised in that:In right step surface (3) and axle Hold cylinder shaft body (4) junction and be provided with grinding undercut (5).

4. the column type gear of bicycle speed-varying unit according to claim 1, it is characterised in that:Set in bearing cylinder shaft body (4) It is equipped with the annular slot (6) for placing end ring.

5. the column type gear of bicycle speed-varying unit according to claim 1, it is characterised in that:On left side male half coupling (11) Gear ring (12) is set with, gear ring (12) is fixedly connected with left side male half coupling (11) by junction of the edges of two sheets of paper screw/pin (13).

6. the column type gear of bicycle speed-varying unit according to claim 5, it is characterised in that:Junction of the edges of two sheets of paper screw/the pin (13) shear strength factor is less than the strength factor of the broken teeth of gear ring (12).