CN209478037U - A kind of positioning device and assembling fixture of balance shaft and gear - Google Patents

Abstract

The utility model relates to balance shafts and gear mounting technology field, in particular to the positioning device and assembling fixture of a kind of balance shaft and gear, including pedestal, the first groove is provided on the pedestal, at least two positioning keys are fixedly installed in the first groove circumferential direction, it further include bracket, the bracket is fixed on the pedestal by link block, the cylindrical surface of indent is set as on the bracket side, the radial both ends on the cylindrical surface are fixedly installed the blade for matching with the balance weight in balance shaft respectively, the axis on the cylindrical surface is overlapped with the axis of the gear after the first groove assembling gear, after being positioned by the pointed part that gear is put into the first groove by positioning key, the axis of balance shaft is matched with the cylindrical surface of bracket, balance weight is matched with blade, the positioning of balance shaft is carried out, so It has been rapidly performed by the positioning of gear and balance shaft, the efficiency of gear and balance shaft assembly has been improved, reduces costs.

Description

A kind of positioning device and assembling fixture of balance shaft and gear

Technical field

The utility model relates to balance shaft and gear mounting technology field, in particular to the positioning of a kind of balance shaft and gear Device and assembling fixture.

Background technique

In engine in the working cycles of engine, the movement velocity of piston is very fast, and speed is very uneven, It is inevitable that very big inertia is generated on piston, piston pin and connecting rod since piston does the movement of high-speed straight-line repeatedly in cylinder Power, but the counterweight on connecting rod can only some moving-mass participate in linear motion, another part participate in rotation, in addition to bottom stopper Outside point position, various inertia force cannot be fully balanced, and engine is made to produce vibration.Vibration frequency is higher, and amplitude is also got over It is small.

Commonly used method is exactly to increase a balance shaft to solve on motorcycle.Balance shaft is briefly exactly one It is a to obtain engine using vibrations power caused by eccentric weight equipped with eccentric weight and with the axis that crankshaft-synchronous rotates Good balance is obtained, the vibration of engine is lowered.Currently, balance shaft and gear are worker in many cases in assembling process Alignment by hand, is balanced the assembly of axis and gear, since the balance weight on gear and balance shaft has relative positional relationship, worker The positioning for carrying out gear and balance shaft with itself vision when carrying out gear and balance shaft is assembled, is oriented to by palm Realize the assembly of gear and balance shaft, but vision positioning usually will appear gear and the larger situation of balance shaft assembling deviation, And artificial palm is balanced the guiding that block and gear assemble usually will appear deviation, cause the product qualified rate assembled compared with It is low, and manual installation effectiveness is lower, lavishes labor on and increase cost.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiency in the presence of the prior art, a kind of balance shaft and tooth are provided The positioning device and assembling fixture of wheel position poor situation when being manually balanced axis and gear assembly to reduce, realize The quick positioning of balance shaft and gear, the final quick assembling for realizing balance shaft and gear.

In order to realize above-mentioned purpose of utility model, the utility model provides following technical scheme:

A kind of positioning device of balance shaft and gear, including pedestal, are provided with the first groove on the pedestal, and described first At least two positioning keys are fixedly installed in groove circumferential direction, described positioning key one end is fixed with first groove, the positioning key The other end is pointed to be arranged in first groove, further includes bracket, and the bracket is fixed at described by link block Above pedestal, it is provided with v-shaped opening on the bracket, the v-shaped opening tip is provided with cylinder groove, the axis of the cylinder groove It is overlapped with the axis of the gear after the first groove assembling gear, further includes the second groove, second groove is arranged in institute It states in the middle part of the first groove.

As a preferred embodiment of the present invention, bulge loop, the height of the bulge loop are provided in the circumferential direction of second groove Degree is the 1/3~1/2 of first groove height, and when assembling gear is into the first groove, bulge loop is far from the flat of the second groove Face is in contact with gear, and the positioning of the plane of two positioning keys and bulge loop progress gear keeps subsequent balance shaft more square Just it is efficiently mounted on gear.

As a preferred embodiment of the present invention, circumferential average angle cloth of the positioning key around first groove It sets, increases positioning key to the locating effect of gear.

As a preferred embodiment of the present invention, the angle of the v-shaped opening is in 130 °~170 °, for cooperating well Balance weight in balance shaft.

As a preferred embodiment of the present invention, first groove is arranged on the pedestal by transition disc, described Transition disc is fixedly connected with the pedestal, by way of increasing transition disc on the base, so that the first groove and bracket is whole Body elevated height can reduce bend over angle of the staff when placing gear and balance shaft to a certain extent.

As a preferred embodiment of the present invention, the junction rounding off of the cylinder groove and v-shaped opening, is balance shaft Axis and cylinder groove it is easier for installation quick.

A kind of assembling fixture of balance shaft and gear, the positioning dress including main body frame and above-mentioned balance shaft and gear It sets, the main body frame includes column, upper cover plate, bottom plate and foot prop, and driving mechanism is fixedly installed on the upper cover plate, described Driving mechanism is connected with moving member, and the driving mechanism drives the moving member to move back and forth along upper cover plate to bottom plate direction, In this way, positioning device and assembling fixture are separated, after balance shaft and gear positioning are completed, by whole positioning dress On bottom plate, moving member one end is connect placement location with driving mechanism, and the moving member other end and balance shaft end thereof contacts pass through driving Mechanism pushes balance shaft, assembles balance shaft and gear and completes, positioning device is separated with assembling fixture so that balance shaft and tooth The positioning of wheel is more convenient.

As a preferred embodiment of the present invention, the driving mechanism is oil cylinder or cylinder, and the moving member is cylinder knot Structure, the moving member are fixedly connected with the piston rod of the oil cylinder or cylinder.

In conclusion due to the adoption of the above technical solution, the utility model has the beneficial effects that

1, due to securing the positional relationship between bracket and the first groove in the technical program, have on gear for determining The aperture of position, gear is put into the first groove according to the position of aperture carried out by the pointed part of positioning key it is circumferentially positioned Afterwards, axle journal one end of balance shaft is put into the inner ring of gear, the axis of balance shaft is matched with the cylinder groove of bracket and is balanced The axially position of axis, the balance weight in balance shaft match with v-shaped opening, are balanced the guiding of axis, are so rapidly performed by The positioning of gear and balance shaft improves the efficiency of balance shaft assembly, reduces costs.

2, after gear and balance shaft are positioned, positioning device is placed on, driving mechanism drives moving member Mobile, moving member pushes the axle journal in balance shaft to move axially along the second groove, and balance shaft smoothly enters the inner ring of gear In, the quick assembling of gear and balance shaft is realized, efficiency is improved, is reduced costs.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of positioning device in the application；

Fig. 2 be Fig. 1 in A to perspective view；

Fig. 3 be Fig. 1 in B to perspective view；

Fig. 4 is the structural schematic diagram of the main body frame of assembling fixture in the application；

Fig. 5 is the structural schematic diagram of balance shaft；

Marked in the figure: 1- pedestal, the first groove of 2-, 3- positioning key, 4- bracket, 5- link block, 6-V shape opening, 7- second Groove, 8- bulge loop, 9- transition disc, 10- main body frame, 11- balance shaft, 111- balance weight, 112- axle journal, 113- balance axis connection Section, 101- column, 102- upper cover plate, 103- bottom plate, 104- foot prop, 11- driving mechanism, 12- moving member, 61- cylinder groove.

Specific embodiment

The utility model is described in further detail below with reference to test example and specific embodiment.But it should not be by this The range for being interpreted as the above-mentioned theme of the utility model is only limitted to embodiment below, all to be realized based on the content of the present invention Technology belongs to the scope of the utility model.

Embodiment 1

As shown in FIG. 1 to 3, the positioning device of a kind of balance shaft and gear, including pedestal 1 are provided on the pedestal 1 First groove 2, is fixedly installed at least two positioning keys 3 in 2 circumferential direction of the first groove, described 3 one end of positioning key and described the One groove 2 is fixed, and it further includes bracket 4, the bracket that 3 other end of positioning key is pointed, which to be arranged in first groove 2, 4 are fixed at 1 top of pedestal by link block 5, and 4 side of bracket is provided with v-shaped opening 6, the v-shaped opening 6 Tip is provided with cylinder groove 61, the axis weight of the gear after the axis of the cylinder groove 61 and 2 assembling gear of the first groove It closes, further includes the second groove 7, the setting of the second groove 7 is at 2 middle part of the first groove.

As depicted in figs. 1 and 2, in the present embodiment, the middle part of first groove 2 is additionally provided with bulge loop 8, the bulge loop 8 Height be 2 height of the first groove 1/3~1/2, when assembling gear is into the first groove 2, bulge loop 8 is recessed far from second The plane of slot 7 is in contact with gear, and the plane positioning of two positioning keys 3 and the progress gear of bulge loop 8 enables subsequent balance shaft 11 It is enough more convenient to be mounted on gear.

As depicted in figs. 1 and 2, in the present embodiment, circumferential average angle of the positioning key 3 around first groove 2 Arrangement increases positioning key 3 to the locating effect of gear.

As shown in Fig. 2, the angle α of the v-shaped opening 6 is in 130 °~170 °, on good complex equilibrium axis 11 Balance weight 111.

As shown in FIG. 1 to 3, in the present embodiment, first groove 2 is arranged on the pedestal 1 by transition disc 9, The transition disc 9 is fixedly connected with the pedestal 1, by way of increasing transition disc 9 on pedestal 1, facilitates the first groove 2 Manufacture, and the first groove 2 and the whole height of bracket 4 are had a certain upgrade, work people can be reduced to a certain extent Bend over angle of the member when placing gear and balance shaft 11.

As shown in figure 4, disclosed herein as well is the assembling fixture of a kind of balance shaft and gear, including main body frame 10 and upper The positioning device of the balance shaft 11 and gear stated, the main body frame includes column 101, upper cover plate 102, bottom plate 103 and foot prop 104, driving mechanism 11 is fixedly installed on the upper cover plate 102, and the driving mechanism 11 is connected with moving member 12, the driving Mechanism 11 drives the moving member 12 to move back and forth along upper cover plate 102 to 103 direction of bottom plate.

As shown in figure 4, the driving mechanism 11 is oil cylinder or cylinder, the moving member 12 is cylindrical structure, the movement Part 12 is fixedly connected with the piston rod of the oil cylinder or cylinder.

As shown in figure 5, the axle journal 112 of balance shaft 11 is put into the inner ring of gear, the second groove 7 leads axle journal 112 To balance weight 111 and v-shaped opening 6 cooperate, and balance shaft linkage section 113 is used to be interference fitted with the inner ring of gear and connect.

The specific work process of the utility model: gear is placed in the first groove 2 first, passes through the point of positioning key 3 After shape part carries out axially position, 112 one end of axle journal of balance shaft 11 is put into the inner ring of gear, balance shaft 11 and bracket 4 Cylinder groove 61 match the axially position for being balanced axis 11, the balance weight 111 in balance shaft 11 is matched with v-shaped opening 6, It is balanced the guiding of axis 11, the positioning work of so carry out being over gear early period and balance shaft 11, by the gear having good positioning, flat Weighing apparatus axis 11 and positioning device are placed on the bottom plate 103 of assembling fixture, drive moving member by the driving mechanism 11 on upper cover plate 102 12, moving member is contacted with the axle journal 112 of balance shaft 11, and balance shaft 11 is the axle journal 112 of gear assembly side along the second groove 7 Axial movement balances axis 11 and moves down offer stroke, and balance shaft 11, which applies pressure, makes balance shaft linkage section 113 enter gear Inner hole in complete assembly, the positioning device structure of the application is simple, easy to operate, improves assembly efficiency, reduces costs.

Claims (7)

1. the positioning device of a kind of balance shaft and gear, which is characterized in that including pedestal (1), is provided on the pedestal (1) One groove (2) is fixedly installed at least two positioning keys (3) in the first groove (2) circumferential direction, described positioning key (3) one end with First groove (2) is fixed, and the pointed setting of positioning key (3) other end further includes branch in first groove (2) Frame (4), the bracket (4) are fixed above the pedestal (1) by link block (5), are arranged on bracket (4) side Have v-shaped opening (6), v-shaped opening (6) tip is provided with cylinder groove (61), the axis of the cylinder groove (61) and described the The axis of gear after one groove (2) assembling gear is overlapped, and further includes the second groove (7), and second groove (7) is arranged in institute It states in the middle part of the first groove (2).

2. the positioning device of balance shaft according to claim 1 and gear, which is characterized in that second groove (7) It is provided in circumferential direction bulge loop (8), the height of the bulge loop (8) is the 1/3~1/2 of the first groove (2) height.

3. the positioning device of balance shaft according to claim 1 and gear, which is characterized in that the positioning key (3) around The circumferential average angle of first groove (2) is arranged.

4. the positioning device of balance shaft according to claim 1 and gear, which is characterized in that the folder of the v-shaped opening (6) Angle is in 130 °~170 °.

5. the positioning device of balance shaft according to claim 1 and gear, which is characterized in that first groove (2) is logical It crosses transition disc (9) to be arranged on the pedestal (1), the transition disc (9) is fixedly connected with the pedestal (1).

6. the assembling fixture of a kind of balance shaft and gear, which is characterized in that including one of main body frame and Claims 1 to 5 institute The positioning device of the balance shaft and gear stated, the main body frame (10) include column (101), upper cover plate (102), bottom plate (103) and foot prop (104) it, is fixedly installed driving mechanism (11) on the upper cover plate (102), driving mechanism (11) connection Have moving member (12), the driving mechanism (11) drives the moving member (12) along upper cover plate (102) to bottom plate (103) direction Move back and forth.

7. the assembling fixture of balance shaft according to claim 6 and gear, which is characterized in that the driving mechanism (11) is Oil cylinder or cylinder, the moving member (12) are cylindrical structure, and the moving member (12) is solid with the piston rod of the oil cylinder or cylinder Fixed connection.