CN202491045U - Crankshaft timing gear assembling device - Google Patents

Abstract

The utility model relates to a crankshaft timing gear assembly device, which comprises a supporting positioning plate, a gear positioning pin, a keyway positioning pin and several supporting pins. The supporting positioning plate is provided with a central circular hole, and a square There is a positioning hole on the end surface of the support positioning plate, and several round pin holes are provided on the outer circle of the end surface. The gear positioning pin is installed in the positioning hole, the keyway positioning pin is installed in the square groove, and the several support The pins are installed in the round pin holes corresponding to the spaces between the teeth of the timing gear. When assembling, align the positioning hole of the heated timing gear with the alignment pin of the spur gear, align the gap between the teeth with the corresponding support pin, align the center hole on the support positioning plate with the small head cylinder of the crankshaft, and align the keyway positioning pin with the crankshaft The half-round key on the small end cylinder pushes the support positioning plate forward along the small end cylinder of the crankshaft, and the timing gear is packed on the crankshaft journal. The utility model has the advantages of reasonable structure, accurate positioning, convenient operation and high assembly efficiency.

Description

Crankshaft timing gear assembly device

technical field

The utility model relates to the field of crankshaft gear assembly, in particular to a crankshaft timing gear assembly device.

Background technique

We know that the timing gear is a gear that plays a time-scale positioning role in the completion of related control functions in a mechanical device. The timing gear is installed on the crankshaft of the engine, and the assembly method is to heat and press the gear into the small end of the crankshaft. Due to the working characteristics of its location, the gear has strict requirements on the circumferential position of the crank pin. In order to ensure the correct installation position, a semicircular keyway is usually provided on the side of the small cylinder of the crankshaft, and a positioning hole is provided on the side of the timing gear. It is very difficult to assemble the plane to meet this condition. At present, there is no special crankshaft timing gear assembly device on the market, and there is no literature report in this regard.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a crankshaft timing gear assembly device with reasonable structure, accurate positioning, easy operation and high assembly efficiency.

The technical solution adopted by the utility model to solve the above technical problems is: a crankshaft timing gear assembly device, which is characterized in that it includes a support positioning plate, a gear positioning pin, a keyway positioning pin and several support pins, and the support positioning plate There is a central circular hole, a square groove is provided above the central circular hole, a positioning hole is provided on the end surface of the support positioning plate, and several round pin holes are provided on the outer circle of the end surface. The gear positioning pin is installed in the positioning hole, and it is aligned with the positive The positioning holes provided on the hour gear correspond; the keyway positioning pins are installed in the square grooves, which correspond to the semicircular keys provided on the small head cylinder of the crankshaft; the several support pins are installed in the round pin holes, which correspond to the The spaces between the teeth of the timing gear correspond to each other.

In the utility model, there is an "L"-shaped cutout connected with the square groove on the upper right side of the center hole of the support positioning plate. When assembling, it is convenient to observe the cooperation between the keyway positioning pin and the half-round key.

The rear portion of the keyway locating pin described in the utility model is a square shape, and the front portion is a semicircle with a seam, which is correspondingly positioned with the semicircle key on the small head cylinder of the crankshaft.

According to the utility model, three round pin holes are evenly distributed on the outer circle of the end surface of the support positioning plate, and the three support pins are correspondingly installed in the round pin holes, corresponding to the spaces between the three teeth of the timing gear.

When the utility model is assembled and used, the positioning hole of the heated timing gear is aligned with the positioning pin of the timing gear, and the gaps between teeth of several timing gears are aligned with the corresponding support pins, and the timing gear is closely supported on the end surface of the supporting positioning plate. , supported and positioned by the support pin and the gear positioning pin installed on the support positioning plate. Then, hold the support positioning plate, align the central hole on the support positioning plate with the crankshaft small end cylinder, align the keyway positioning pin with the half-round key on the crankshaft small end cylinder, push the support positioning plate forward along the crankshaft small end cylinder, and The timing gear is installed on the crankshaft journal, and after cooling, the accurate assembly of the crankshaft timing gear is realized. Compared with the prior art, the utility model has the advantages of reasonable structure, accurate positioning, convenient operation and high assembly efficiency, and is an ideal crankshaft timing gear assembly device.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a schematic diagram of the assembled state of the utility model.

FIG. 2 is a schematic left view of FIG. 1 .

Among the figure 1. crankshaft, 2. timing gear, 3. support pin, 4. support positioning plate, 5. keyway positioning pin, 6. gear positioning pin.

Detailed ways

It can be seen from FIG. 1 and FIG. 2 that a crankshaft timing gear assembly device is used for assembling the timing gear 2 onto the crankshaft 1 . Same as prior art, timing gear 2 is provided with positioning hole, and crankshaft 1 small head cylinder is provided with semicircle key, determines the accurate mounting position of timing gear on crankshaft by positioning hole and semicircle key.

The crankshaft timing gear assembly device of the present utility model comprises a supporting positioning plate 4, gear positioning pins 6, keyway positioning pins 5 and several supporting pins 3. The support positioning plate 4 is provided with a central circular hole, a square groove is arranged above the central circular hole, a positioning hole is provided on the end surface of the support positioning plate 4, and several round pin holes are provided on the outer circle of the end surface. The gear positioning pin 6 is installed In the positioning hole, it corresponds to the positioning hole provided on the timing gear 2; the keyway positioning pin 5 is installed in the square groove, which corresponds to the semicircular key provided on the crankshaft 1 small head cylinder; the several Support pin 3 is installed in the circular pin hole, and it corresponds to several interdental spaces of timing gear 2.

The keyway locating pin 4 described in the utility model is used for cooperating with the semicircle key on the crankshaft 1 to locate and arrange. The keyway locating pin 4 rear portion is square, and the front portion is a semicircle with seam, correspondingly cooperating with the semicircle key on the crankshaft 1 small end cylinder.

There is an "L" shaped cutout connected with the square groove on the upper right side of the central circular hole of the support positioning disc 4 in the utility model. During assembly, it is convenient to observe the cooperation of the keyway positioning pin 5 and the semicircular key on the crankshaft 1 small head cylinder from the oblique top.

Several support pins 3 are installed on the support positioning plate 4 described in the utility model, and the support pins 3 are matched with the corresponding interdental space of the timing gear 2 to play the role of supporting the timing gear. Generally speaking, installing three support pins 3 is the best implementation mode. Specifically, the outer circles of the end faces of the support positioning plate 4 are 120 degrees apart, and three round pin holes are evenly arranged, and the three support pins 3 are respectively installed in the round pin holes. , corresponding to the space between the three teeth of the timing gear 2, used to support and hold the timing gear.

When the utility model is assembled and used, the positioning hole of the heated timing gear 2 is aligned with the positioning pin 6 of the timing gear, and the spaces between the teeth of the three timing gears are aligned with the corresponding three support pins 3, and the timing gear 2 is closely supported. On the end face of the support positioning disc 4, it is supported and positioned by the support pin 3 and the gear positioning pin 6 installed on the support positioning disc. Then, hold the support positioning plate 4, align the center hole on the support positioning plate 4 with the crankshaft 1 small head cylinder, keyway positioning pin 5 align with the semicircular key on the crankshaft 1 small head cylinder, and push forward along the crankshaft small head cylinder Support the positioning plate 4, put the timing gear 2 into the journal of the crankshaft 1, and after cooling, the accurate assembly of the crankshaft timing gear is completed.

The utility model has the advantages of reasonable structure, accurate positioning, convenient operation and high assembly efficiency, and is an ideal crankshaft timing gear assembly device.

Claims (4)

1. crankshaft timing gear assembling device; It is characterized in that: it comprises support positioning disk, gear alignment pin, keyway alignment pin and several supporting pins, and said support positioning disk is provided with center hole, and the center hole top is provided with a square groove; Support the positioning disk end face and be provided with a locating hole; The end face cylindrical is provided with several pin hole, and said gear alignment pin is installed in the locating hole, and it is corresponding with the locating hole that timing gears are provided with; Said keyway alignment pin is installed in the square groove, and it is corresponding with the woodruff key that bent axle microcephaly cylinder is provided with; Said several supporting pins are installed in the pin hole, and its several between cog spaces with timing gears are corresponding.

2. crankshaft timing gear assembling device according to claim 1 is characterized in that: said support positioning disk center hole upper right side has " L " shape otch of connecting with said square groove.

3. crankshaft timing gear assembling device according to claim 1 is characterized in that: said keyway alignment pin rear portion is square, anterior semicircle for the band seam, the location of corresponding cooperation with the woodruff key on the bent axle microcephaly cylinder.

4. crankshaft timing gear assembling device according to claim 1 is characterized in that: said support positioning disk end face cylindrical is laid with three pin hole, and three said supporting pin correspondences are installed in the pin hole, and is corresponding with three between cog spaces of timing gears.

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