Belt pulley tightening counterforce device

Abstract

The utility model discloses a belt pulley tightening counter-force device, belongs to the technical field of process equipment, and solves the problems of low assembly quality and potential safety hazards to operators in a manner of manually fixing or assisting in fixing a crankshaft by a simple tool. The belt pulley tightening counter-force device comprises a supporting base installed on one side of a tightening shaft, the supporting base is installed on tightening equipment, a counter-force installation plate is detachably arranged at one end of the supporting base, a positioning shaft is arranged on the counter-force installation plate, the cross section of the supporting base and the cross section of the counter-force installation plate are both in a semi-arc shape, and the positioning shaft is arranged on the positioning shaft. Two counter-force sleeves are detachably arranged on the counter-force mounting plate, and the tightening sleeve and the two counter-force sleeves are arranged in a circumferential mode with the central axis of the positioning shaft as the circle center. According to the belt pulley tightening counter-force device, the assembling quality is effectively ensured, and potential safety hazards are prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to process equipment technical field, more specifically, it relates to a belt pulley tightening counterforce device. BACKGROUND

[0002] In the process of assembling the belt pulley shock absorber of diesel engine or gasoline engine, the shock absorber needs to be assembled on the engine and tightened to the torque value specified by the process. Previously, the engine crankshaft was often fixed manually, and then the bolt on the engine shock absorber was tightened manually, but this method is time-consuming and laborious, and the stability of the counterforce cannot be guaranteed by manual fixing, which may cause safety hazards to the operator and damage the belt pulley shock absorber and related parts.

[0003] Currently, the engine crankshaft is usually fixed by a simple tool, and then the bolt on the engine shock absorber is tightened by the tightening shaft of the tightening device, but this method also has many defects. The precision of fixing the engine crankshaft by a simple tool is poor, which may cause uneven tightening torque of the bolt on the shock absorber, resulting in poor product quality and assembly efficiency. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a belt pulley tightening counterforce device to effectively prevent the crankshaft disc from rotating during tightening, ensure uniform stress on the bolt, effectively ensure assembly quality, and prevent safety hazards.

[0005] The technical scheme of the utility model is as follows: a belt pulley tightening counterforce device, comprising a support seat installed on one side of a tightening shaft, the support seat is installed on a tightening device, one end of the support seat is detachably provided with a counterforce mounting plate, a positioning shaft is arranged on the counterforce mounting plate, the cross sections of the support seat and the counterforce mounting plate are both semicircular arcs, two counterforce sleeves are detachably arranged on the counterforce mounting plate, and the tightening shaft and the two counterforce sleeves are arranged in a circle with the central axis of the positioning shaft as the center.

[0006] As a further improvement, the positioning shaft is provided with a clearance groove on one side close to the lower part of the tightening shaft.

[0007] Further, a hollow cavity with an open top is arranged on the positioning shaft, a through hole is arranged at the bottom of the hollow cavity, a fastening bolt is arranged in the through hole, and the positioning shaft is bolted to the counterforce mounting plate through the fastening bolt.

[0008] Further, the support seat is in a stepped shape.

[0009] Further, a limiting groove is arranged at the top of the support seat, a limiting block is arranged at the bottom of the counterforce mounting plate, and the limiting block is movably inserted into the limiting groove.

[0010] Further, the limiting block and the limiting groove are both cylindrical, and the diameter of the limiting groove is greater than the diameter of the limiting block.

[0011] Further, the length of the positioning shaft is greater than the length of the counterforce sleeve, and the end face of the positioning shaft is flush with the end face of the tightening shaft.

[0012] Advantages

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The belt wheel tightening counterforce device of the utility model, the device is equipped with two counterforce sleeves on the bolt head, thereby achieving the effect of fixing the belt wheel damper as a whole, when the tightening shaft tightens the bolt, the counterforce generated is applied to the support seat through the counterforce sleeve, effectively preventing the crank disc from rotating during tightening, and the bolt is uniformly stressed, effectively ensuring the assembly quality and preventing the occurrence of safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0016] Fig. 2 It is a cross-sectional structure schematic view of the counterforce plate in the utility model;

[0017] Fig. 3 It is a cross-sectional structure schematic view of the support seat and the counterforce mounting plate in the utility model.

[0018] Wherein: 1-tightening equipment, 2-support seat, 3-counterforce mounting plate, 4-positioning shaft, 5-tightening shaft, 6-counterforce sleeve, 7-giving way groove, 8-hollow cavity, 9-fastening bolt, 10-limiting groove, 11-limiting block. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with the specific embodiments in the drawings.

[0020] Reference Figs. 1-3The belt pulley tightening counterforce device comprises a support base 2 installed on one side of a tightening shaft 5, the support base 2 is installed on a tightening device 1, one end of the support base 2 is detachably provided with a counterforce mounting plate 3, the counterforce mounting plate 3 is provided with a positioning shaft 4, the support base 2 and the counterforce mounting plate 3 are both semicircular in cross section, the counterforce mounting plate 3 is detachably provided with two counterforce sleeves 6, the tightening shaft 5 and the two counterforce sleeves 6 are arranged in a circle with the central axis of the positioning shaft 4 as the center.

[0021] In the embodiment, the positioning shaft 4 is provided with a clearance groove 7 near the lower side of the tightening shaft 5, the side surface of the clearance groove 7 is flush with the side surface of the support base 2, so that the positioning shaft 4 does not interfere with other components during installation.

[0022] In the embodiment, the positioning shaft 4 is provided with a hollow cavity 8 with an open top, the bottom of the hollow cavity 8 is provided with a through hole, the through hole is provided with a fastening bolt 9, the positioning shaft 4 is bolted to the counterforce mounting plate 3 through the fastening bolt 9, and the fastening bolt 9 is a hexagonal bolt.

[0023] In the embodiment, the support base 2 is stepped, the larger end of the support base 2 is connected to the tightening device, and the smaller end of the support base 2 is connected to the counterforce mounting plate 3, so that the manufacturing material of the support base 2 is effectively reduced, thereby reducing the manufacturing cost of the support base 2.

[0024] In the embodiment, the top of the support base 2 is provided with a limiting groove 10, the bottom of the counterforce mounting plate 3 is provided with a limiting block 11, the limiting block 11 is movably inserted into the limiting groove 10, the counterforce mounting plate 3 is bolted with the support base 2, when the counterforce mounting plate 3 is installed, a plurality of mounting holes on the counterforce mounting plate 3 need to be aligned with a plurality of bolt holes on the top of the support base 2 one by one, which is more troublesome, the limiting block 11 is inserted into the limiting groove 10, a plurality of mounting holes on the counterforce mounting plate 3 can be quickly aligned with corresponding bolt holes on the support base 2, the installation of the counterforce mounting plate 3 is facilitated, and the installation efficiency is improved.

[0025] In the embodiment, the limiting block 11 and the limiting groove 10 are both cylindrical, the diameter of the limiting groove 10 is greater than the diameter of the limiting block 11, and the diameter of the limiting groove 10 is slightly greater than the diameter of the limiting block 11, when there is an error between the mounting holes on the counterforce mounting plate 3 and the bolt holes on the support base 2, the error can be finely adjusted by the movement of the limiting block 11 in the limiting groove 10, and the cylindrical limiting block 11 and the limiting groove 10 facilitate 360° omnidirectional position adjustment.

[0026] In the embodiment, the length of the positioning shaft 4 is greater than the length of the counterforce sleeve 6, the insertion depth of the counterforce sleeve 6 is limited, and the situation that the counterforce sleeve 6 is inserted too deeply to be stuck with the bolt is avoided, the end surface of the positioning shaft 4 is flush with the end surface of the tightening shaft 5, the tightening shaft 5 is stretchy, can be adjusted in length to adapt to bolts of different specifications, and the working efficiency and applicability are improved.

[0027] The above only describes preferred embodiments of the utility model, and it should be noted that for those skilled in the art, without departing from the structure of the utility model, a number of modifications and improvements can be made, which will not affect the effect and practicality of the utility model.

Claims

1. A pulley tightening counterforce device characterized by, It includes the support seat (2) installed on one side of the tightening shaft (5), the support seat (2) is installed on the tightening device (1), one end of the support seat (2) is detachably provided with a counterforce mounting plate (3), the counterforce mounting plate (3) is provided with a positioning shaft (4), the cross section of the support seat (2) and the counterforce mounting plate (3) is semicircular arc, the counterforce mounting plate (3) is detachably provided with two counterforce sleeves (6), the tightening shaft (5) and the two counterforce sleeves (6) are arranged in a circle around the central axis of the positioning shaft (4).

2. A pulley tightening counterforce device according to claim 1, characterized in that The positioning shaft (4) is provided with a gap slot (7) near one side of the lower part of the tightening shaft (5).

3. A pulley tightening counterforce device according to claim 1, wherein The positioning shaft (4) is provided with a hollow cavity (8) with an open top, the bottom of the hollow cavity (8) is provided with a through hole, the through hole is provided with a fastening bolt (9), the positioning shaft (4) is bolted with the counterforce mounting plate (3) through the fastening bolt (9).

4. A pulley tightening counterforce device according to claim 1, wherein The support seat (2) is in a stepped shape.

5. A pulley tightening counterforce device according to claim 1, wherein The top of the support seat (2) is provided with a limiting slot (10), the bottom of the counterforce mounting plate (3) is provided with a limiting block (11), the limiting block (11) is movably inserted into the limiting slot (10).

6. A pulley tightening counterforce device according to claim 5, wherein The limiting block (11) and the limiting slot (10) are both cylindrical, and the diameter of the limiting slot (10) is greater than the diameter of the limiting block (11).

7. A pulley tightening counterforce device according to claim 1, wherein The length of the positioning shaft (4) is greater than the length of the counterforce sleeve (6), and the end face of the positioning shaft (4) is flush with the end face of the tightening shaft (5).

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