JP4245261B2 - Tappet adjustment jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a jig for adjusting, for example, a tappet clearance of a vehicle engine.
[0002]
[Prior art]
Conventionally, for example, to adjust the tappet clearance of a vehicle engine, adjust the clearance by screwing the adjustment bolt with the thickness gauge inserted into the tappet gap, and tighten the adjustment nut when the desired clearance is obtained. However, after extracting the thickness gauge, it is common to use a torque wrench to tighten the adjustment nut to the specified torque. From the viewpoint of complication, for example, Japanese Patent Application Laid-Open No. 50-119400 discloses a technique for performing a series of operations with a single tool.
[0003]
[Problems to be solved by the invention]
However, the adjustment tool of the above technique has a problem that the mechanism is complicated and handling is required skillful, and it cannot be easily handled by beginners and the like, and the cost of the apparatus configuration is high.
[0004]
Accordingly, an object of the present invention is to provide an adjustment jig having a simple configuration that can be easily handled even by a beginner with a low level of skill, can perform adjustment work smoothly and accurately.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a tappet adjusting jig including an outer wrench for rotating an adjustment nut and an inner wrench for rotating an adjustment bolt. The rotary operation body has an insertion hole through which an inner wrench can be inserted and a rotary operation body . The rotary operation body includes a ring member that is rotatably fitted to the shaft portion of the outer wrench body, and a pair of handle members that are fixed to the ring member. Thus, the torque management mechanism is provided at predetermined intervals on the lower surface of the ring member and adjusts the engagement force between the radial groove having the bottom surface as the cam surface and the steel ball by the biasing force of the spring.
[0006]
If a ratchet type torque management mechanism is provided on the outer wrench in this way, after adjusting the tappet clearance by screwing the adjustment bolt with the inner wrench, the adjustment nut can be tightened and fixed with the outer wrench and simultaneously set to the specified torque. Work is simplified.
Further, if an inner wrench is inserted through the insertion hole, the whole can be compactly assembled and a series of operations can be performed efficiently.
Here, the ratchet torque management mechanism refers to a mechanism that can be fastened and fixed with a prescribed torque by an engagement mechanism using ratchet teeth, for example.
[0008]
If the tightening torque is adjusted by changing the biasing force of the spring, the apparatus is simplified and the tightening torque can be easily adjusted.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is an explanatory view showing a use state of a tappet adjusting jig according to the present invention, FIG. 2 is an explanatory view of an outer wrench, FIGS. 3 and 4 are explanatory views of a torque management mechanism of an outer wrench, and FIG. Is an overall view of the rotary operation body, FIG. 3B is an explanatory view of the radial groove of the ring member, FIG. 3C is a cross-sectional view taken along line AA of FIG. 3B, and FIG. It is explanatory drawing of a part.
[0010]
The tappet adjusting jig according to the present invention can adjust the tappet clearance of a vehicle engine, for example, so that even a low-skilled person can accurately perform the adjusting operation, and the tightening torque is simple in structure. Can be adjusted easily.
[0011]
That is, the tappet adjusting jig 1 includes an outer wrench 2 for tightening the adjusting nut N and an inner wrench 3 for adjusting the adjusting bolt B, as shown in FIG. A thickness gauge g is inserted in between, and the tappet clearance can be adjusted using the tappet adjusting jig 1.
[0012]
As shown in FIG. 2, the outer wrench 2 includes an outer wrench main body 4 having an insertion hole h at the center, a rotary operation body 5 disposed on an upper portion of the intermediate flange portion 4f of the outer wrench main body 4, and the rotation A spring 6 disposed on the upper portion of the operating body 5 and first and second lock nuts 7 and 8 for adjusting the urging force of the spring 6 are provided, and an adjustment nut is provided on the lower end side of the outer wrench 2. The fitting part 4k fitted to N is provided.
[0013]
As shown in FIG. 3A, the rotary operation body 5 includes a ring member 10 that is rotatably fitted to the shaft portion of the outer wrench body 4, and a pair of members fixed to the ring member 10 by welding or the like. A handle member 11 is provided, and a plurality of radial grooves 10m as shown in FIGS. 3B and 3C are provided at predetermined intervals on the lower surface of the ring member 10 (on the side facing the intermediate flange portion 4f). .
[0014]
The bottom surface of the radiating groove 10m is a cam surface. As shown in FIG. 3C, the upstream side in the tightening rotation direction is a stepped portion that drops sharply, and the downstream side is an inclined surface portion.
[0015]
As shown in FIG. 4, a plurality of ball receiving grooves n are formed on the upper surface of the intermediate flange portion 4f of the outer wrench body 4 (on the side facing the rotary operation body 5), and the steel balls 12 ( FIG. 2) is provided.
The radial groove 10 m of the ring member 10 and the steel ball 12 are engaged with each other, and the pressure contact force between the radial groove 10 m and the steel ball 12 can be adjusted by the spring 6.
[0016]
The torque management mechanism T is constituted by the radial groove 10m, the steel ball 12, the spring 6 and the like. When the rotary operation body 5 is rotated, the outer wrench main body 4 is rotated by the engagement of the steel ball 12 and the radial groove 10m. I try to do it.
[0017]
When the outer wrench body 4 as described above is assembled in the state shown in FIG. 2, the adjustment nut N is fitted to the fitting portion 4 k and the handle 11 of the operation rotating body 5 is rotated clockwise. The outer wrench body 4 is rotated by engaging the radial groove 10m and the steel ball 12, and the adjustment nut N is tightened.
When the adjusting nut N is tightened and the rotational torque is increased to a certain value or more, and this torque exceeds the engagement force between the radial groove 10m and the steel ball 12, the steel ball 12 slides off the inclined surface portion of the radial groove 10m. Thus, only the operation rotating body 5 is idled and the rotation of the outer wrench body 4 is stopped.
[0018]
This rotational torque can be adjusted by adjusting the engagement force between the radial groove 10m and the steel ball 12, that is, by changing the urging force of the spring 6. For example, the first and second lock nuts 7 and 8 can be When tightened, it is possible to increase the urging force of the spring 6 and increase the rotational torque. Conversely, when the first and second lock nuts 7 and 8 are loosened, the urging force of the spring 6 is weakened and the rotational torque is reduced. Is possible.
[0019]
The inner wrench 3 is inserted into the insertion hole h of the outer wrench body 4 so that the driver part 3a at the distal end can be engaged with the groove of the adjustment bolt B and rotated, and in the embodiment, on the proximal end side. A general commercial product equipped with an operation part 3s and a ratchet mechanism part 3r is used, and finally tightening with the ratchet mechanism part 3r eliminates the variation in the tightening of the adjustment bolt B and makes the tappet clearance constant. Is made possible.
[0020]
The tappet adjusting jig 1 as described above is set as shown in FIG. 1, the thickness gauge g is set, the adjustment bolt B is tightened by the operation portion 3s of the inner wrench 3, and finally the ratchet mechanism portion 3r is used to ratchet. Tighten while checking the sound. When the thickness gauge g is slid and a desired clearance is confirmed, the adjustment nut N is tightened by the outer wrench 4 and set to a prescribed torque. Then, the thickness gauge g and the tappet adjusting jig 1 are removed.
[0021]
In the adjustment work as described above, work that previously relied on the skillful person's cans and tips can now be performed accurately even by a low-skilled person such as a beginner, and the device configuration is also simple. Therefore, it can be configured at low cost.
[0022]
The present invention is not limited to the above embodiment. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
[0023]
【The invention's effect】
As described above, the tappet adjusting jig according to the present invention is provided with the ratchet type torque management mechanism on the outer wrench for rotating the adjustment nut, so that the adjustment nut is tightened and fixed with the outer wrench at the same time as the specified torque. It can be set, the work is simplified, and a series of work can be efficiently performed by inserting the inner wrench through the insertion hole of the inner wrench.
Further , since the torque management mechanism is configured to adjust the engagement force between the radial groove having the bottom surface as the cam surface and the steel ball by the biasing force of the spring , the device is simplified and the adjustment is easy.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a use state of a tappet adjusting jig according to the present invention. FIG. 2 is an explanatory view of an outer wrench. FIG. 3 is an explanatory view of a rotary operation body, (a) is an overall view, and (b) is a ring. Explanatory drawing of the radiating groove of the member, (c) is a cross-sectional view taken along the line AA of (b). [Fig.
DESCRIPTION OF SYMBOLS 1 ... Tappet adjustment jig, 2 ... Outer wrench, 3 ... Inner wrench, 6 ... Spring, N ... Adjustment nut, B ... Adjustment bolt, T ... Torque management mechanism

Claims (1)

A tappet adjustment jig provided with an outer wrench for rotating an adjustment nut and an inner wrench for rotating an adjustment bolt, the outer wrench having a ratchet type torque management mechanism and for inserting the inner wrench The torque control mechanism includes an insertion hole and a rotation operation body , and the rotation operation body includes a ring member rotatably fitted to the shaft portion of the outer wrench body and a pair of handle members fixed to the ring member. The tappet adjustment jig is configured to adjust the engagement force between the radial groove having the bottom surface as the cam surface and the steel ball and the biasing force of the spring , provided at predetermined intervals on the lower surface of the ring member .

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