JPH0680565U - Tightening tool - Google Patents

Abstract

(57) [Summary] [Purpose] Tighten the adjustment bolt screwed into the screw hole of the work to adjust the screwing position, and lock the adjustment bolt to fix the screwing position after the adjustment. To enable a series of adjustment work for tightening nuts to be performed efficiently and accurately. A T-shaped wrench W having a bolt engaging portion 4 capable of engaging with a head h of an adjusting bolt B in a non-rotatable manner at a shaft end.
r ₁ , a socket S through which the shaft portion 2 of the T-shaped wrench slidably and rotatably penetrates, and a torque wrench Wr ₂ connected to the base portion 6 of the socket, the tip of the socket S includes A receiving port 5a is formed which can receive the bolt engaging portion 4 in a relatively rotatable manner and can be fitted into the lock nut N in a relatively non-rotatable manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a tightening tool, in particular, an adjusting bolt screwed into a screw hole of a workpiece is tightened to adjust the screwing position, and the adjusting bolt is fixed to the adjusting bolt to fix the screwed position. The present invention relates to a tool used for tightening a lock nut.

[0002]

[Prior art]

 Conventionally, for example, an adjusting bolt for finely adjusting the throttle pressure, which is one of the transmission control signal pressures of the transmission, is screwed into the throttle body of an automatic transmission for automobiles. Needs to be performed accurately using a pressure gauge.

To perform such adjustment work, for example, as shown in FIG. 5, a throttle body W is held on a fixing jig A, and a measurement hydraulic circuit (not shown) is connected to the body W. . Then, after the operator directly screwed the adjusting bolt B into the screw hole of the throttle body W by hand, the adjusting bolt B should be T while watching the pressure gauge to finely adjust the screwing position (that is, the throttle pressure). 'tightening operated, the further lock nut N on the bolt B to fix the adjustment position, the T-type wrench Tr _1' type wrench Tr ₁ operation tightened with a spanner-type torque wrench Tr ₂ 'so as not to interfere with I am trying to do it.

[0004]

[Problems to be solved by the device]

By the way, the tightening operation of the lock nut N by the torque wrench Tr ₂ ′ must be performed with the adjusting bolt B fixed after the tightening operation being fixed by the T-shaped wrench Tr ₁ ′ so that the adjusting position is not misaligned. During the series of operations, the worker needs to hold the T-type wrench Tr ₁ ′ in one hand and the spanner-type torque wrench Tr ₂ ′ in the other hand individually, and both hands are closed, so both hands are closed. If there are inconveniences such as not being able to perform other operations in parallel, and if there is a protrusion a on the outer surface of the work W on the lock nut N side as shown in FIG. 5, then a spanner type is used to avoid the protrusion a. When the torque wrench Tr ₂ ′ is slantedly hooked on the lock nut N, the sufficient engagement amount cannot be obtained, and the torque wrench Tr ₂ ′ slips during the tightening and carelessly comes from the lock nut N. Fear of coming off There is. Further, since the torque wrench Tr ₂ ′ is a wrench type, there are some restrictions on the direction in which the wrench can be used, and depending on the direction of the lock nut N, the wrench Tr ₂ ′ becomes difficult to hold and the work efficiency decreases. There is also.

The present invention has been proposed in view of the above, and an object thereof is to provide a tightening tool which solves the above-mentioned problems of the related art and enables the adjustment work for the adjustment bolt to be performed efficiently and accurately. And

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a tightening operation of an adjusting bolt screwed into a screw hole of a workpiece to adjust its screwing position, and a fixing bolt to adjust the screwing position after the adjustment. A T-shaped wrench having a bolt engaging portion at a tip of a shaft portion, which is a tightening tool used for tightening a lock nut, the bolt engaging portion capable of engaging with the head of the adjusting bolt in a relatively non-rotatable manner, The T-type wrench includes a socket through which the shaft portion is slidably and rotatably pierced, and a torque wrench connected to a base portion of the socket, and the bolt engaging portion is provided at a front portion of the socket. A first feature is that a receiving port is formed that can receive the relative rotation so as to be able to fit with the lock nut so as not to rotate relative to the lock nut. Further, in addition to this feature, the torque wrench has a base end portion. A wrench body with a handle on the An engaging portion rotatably fitted to the tip of the wrench body, the engaging portion having an engaging hole that allows the outer circumference of the base portion of the socket to be relatively non-rotatably fitted, and the engaging portion and the wrench body. The second feature is that the eyeglass-type wrench with a ratchet is provided with a ratchet mechanism interposed between the two.

[0007]

[Work]

 According to the above configuration, the fine adjustment work of the screwing position of the adjustment bolt can be performed by the operator without any trouble by using the T-wrench while looking at the gauge such as the pressure gauge, and after the fine adjustment work is completed. Since the worker can support the T-wrench with one hand while holding the adjustment position of the adjustment bolt fixed, the torque wrench can be used to easily tighten the lock nut through the socket. Not only is it convenient for the worker to temporarily release one hand from the torque lench during the work process, but even if there is a protrusion on the outer surface of the work on the lock nut side, it does not interfere with the protrusion. While avoiding, a sufficient allowance for the lock nut can be secured and the tightening operation of the nut can be performed accurately.

Further, when the torque wrench is a box-type wrench with a ratchet, the wrench can be easily tightened from the direction in which the wrench is easy to hold, regardless of the orientation of the lock nut.

[0009]

【Example】

 An embodiment in which the present invention is applied to a tightening tool for adjusting a throttle pressure of an automatic transmission for an automobile will be described below with reference to the drawings. 1 is a partially cutaway side view showing the embodiment, FIG. 2 is a plan sectional view taken along the line 2-2 in FIG. 1, and FIG. 3 is a bottom view taken along the line 3 in FIG. FIG. 4 is a partially cutaway side view similar to FIG. 1, showing a lock nut tightening operation process.

The throttle body W as a work is to generate a throttle pressure as a control signal pressure for the automatic transmission according to the throttle opening, and as shown in FIG. The throttle pressure can be finely adjusted by rotating the adjusting bolt B that is screwed into. The head h of the adjusting bolt B is formed in a hexagonal shape so that the tool can be easily engaged, and the external thread of the outer periphery of the adjusting bolt B is pressed against the outer surface of the body W to fix the screwing position of the adjusting bolt B. A lock nut N that can be tied is screwed.

The tightening tool Tr is used for tightening the adjusting bolt B to adjust its screwing position and for tightening the lock nut N to fix the screwing position after the adjustment. And a T-shaped wrench Tr for tightening and fixing the adjustment bolt B. ₁ And a socket S that serves as an engaging means for the lock nut N, and a T-shaped wrench Tr through the socket S.₁Box-type torque wrench Tr connected to₂It is equipped with.

The T-type wrench Tr ₁ is basically configured in a T-shape by a shaft portion 2 and a rod-shaped grip portion 3 integrally connected to the base end of the shaft portion 2, At the tip of the shaft portion 2, there is provided a large-diameter cylindrical portion 4 as a bolt engaging portion, which has a bolt engaging hole 4a that can be fitted into the hexagonal head h of the adjusting bolt B so as to be relatively non-rotatable. They are connected in a row. The above structure is similar to that of a conventionally known T-wrench.

The socket S has a cylindrical tip portion 5 having a receiving port 5a, and a base portion 6 having at its center portion an insertion hole 6a through which the shaft portion 2 of the T-shaped wrench Tr ₁ is slidably and rotatably passed. The outer peripheral portion of the base portion 6 has a hexagonal cross section (see FIG. 2). The receiving port 5a is an inner small-diameter hole portion 7 capable of receiving the large-diameter cylindrical portion 4 of the T-type wrench Tr _{1 in} a relatively rotatable manner, and is connected to the small-diameter hole portion 7 so as to be non-rotatably fitted to the lock nut N. It is formed in a stepped hole shape with the outer large diameter hole portion 8 to be obtained.

The torque wrench Tr ₂ has a rod-shaped wrench body 9 having a grip portion 9 a at its base end, and a tubular shape rotatably fitted in a support hole 9 b provided at the tip of the wrench body 9. The engaging portion 10 is provided, and between the outer peripheral portion of the engaging portion 10 and the support hole 9b, the direction of the tightening torque that can be transmitted from the wrench body 9 to the engaging portion 10 is clockwise or counterclockwise. A well-known ratchet mechanism R that can be selected for any of the above is interposed, and the ratchet mechanism R is provided with an operation knob (not shown) for switching the tightening direction at any time. . The engaging portion 10 is formed with a hexagonal engaging hole 10a in which the outer periphery of the base portion 6 of the socket S is fitted and held so as to be relatively non-rotatable, and the socket S from the engaging hole 10a is formed. A disk-shaped retaining piece 11 for preventing the falling off is fixed to the outer surface of the base portion 6 of the socket S by a plurality of screws 12.

Next, a procedure for adjusting the throttle pressure using the tool Tr will be described. First, the throttle body W as a work is held by a fixing jig, and a hydraulic circuit for measurement (not shown) is connected to the body W. Then, by manually screwing the adjusting bolt B into the screw hole 1 of the body W by an operator and appropriately screwing the lock nut N onto the outer periphery of the bolt B, the bolt B and the nut N are screwed. Make a temporary attachment.

After that, the worker tightens the adjusting bolt B with the T-shaped wrench Tr ₁ of the tool Tr while observing the pressure gauge to finely adjust the screwing position (that is, the throttle pressure).

After such fine adjustment work, if the worker holds the T-type wrench Tr ₁ firmly with _one hand and holds the adjustment bolt B fixed, the shaft portion 2 of the T-type wrench Tr ₁ Since the socket S equipped with the torque wrench Tr ₂ can be slidably and rotatably supported, hold the handle portion 9a of the torque wrench Tr ₂ or the socket S with the other hand and hold the tip of the socket S. The receiving port 5a can be fitted into the lock nut N without difficulty, and then the lock nut N can be tightened by the torque wrench Tr ₂ through the socket S.

Therefore, the worker can temporarily release one hand from the torque wrench Tr ₂ during the series of work steps, and thus it is possible to perform switch operations of various instruments related to pressure adjustment in parallel, which is convenient. Not only that, even if there is a protrusion a on the outer surface of the throttle body W on the lock nut N side as shown in FIG. 4, it is sufficient for the lock nut N while avoiding interference with the protrusion a. Since a sufficient margin can be secured, the tightening operation for the torque wrench Tr ₂ can always be performed accurately.

Since the torque wrench Tr ₂ is a box-type wrench with a ratchet as described above, the wrench body 9 can be freely idled in the loosening direction of the wrench. Instead, the torque wrench Tr ₂ can be easily tightened from the direction easy to hold.

In the working process of the above-described embodiment, the screwing position fine adjustment work of the adjusting bolt B by the T-type wrench Tr ₁ while looking at the pressure gauge is performed by socketing the lock nut N temporarily attached to the bolt B. This is done before fitting the receiving port 5a for S, but in the present invention, the position where the adjusting bolt B is screwed by the T-type wrench Tr _{1 in} the state where the receiving port 5a for socket S is fitted in the lock nut N. Fine adjustment work may be performed. Further, the tightening tool of the present invention is not limited to the throttle pressure adjusting mechanism as shown in the drawing, but can be applied to various adjusting mechanisms in which adjusting bolts and lock nuts are combined. Of course there is.

[0021]

[Effect of device]

 As described above, according to the present invention, a worker can perform fine adjustment work of the screwing position of the adjustment bolt with the T-type wrench while watching the measuring instrument such as the pressure gauge, and the fine adjustment work can be performed. After completion, the operator can easily tighten the lock nut via the socket with the torque wrench while holding the T-wrench with one hand while holding the adjustment position of the adjustment bolt fixed. Not only is it convenient for the worker to temporarily release one hand from the torque wrench during a series of work steps, but even if there is a protrusion on the outer surface of the work on the lock nut side, it will interfere with the protrusion. While avoiding the above, it is possible to secure a sufficient allowance for the lock nut, and it is possible to always perform accurate tightening operations for the torque wrench, which can greatly contribute to improving the efficiency of adjustment work as a whole. In addition, the above two types of wrenches can be handled as one tool by being bundled, which is convenient for handling and management.

Further, according to the second feature of the present invention, since the torque wrench is a box-type wrench with a ratchet, it is possible to easily perform the tightening operation from the direction in which the wrench is easy to hold regardless of the direction of the lock nut. It is possible to contribute to the further improvement of the adjustment work efficiency.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 2 is a plan sectional view taken along the line 2-2 of FIG.

FIG. 3 is a bottom view seen from the arrow 3 of FIG.

FIG. 4 is a partially cutaway side view similar to FIG. 1, showing a lock nut tightening operation process;

FIG. 5 is a perspective view showing an outline of a tightening process of a conventional example.

[Explanation of symbols]

B ‥‥‥‥ Adjustment bolt h ‥‥‥‥ Head N ‥‥‥‥ Lock nut R ‥‥‥‥ Ratchet mechanism S ‥‥‥‥ Socket Tr ₁ ‥‥ T-type wrench Tr ₂ ‥ Torque wrench 1 ‥‥‥・ ・ ・ Screw hole 4 ‥‥‥ Large cylinder as bolt engaging part 5 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 10 ... Engagement part 10a ... Engagement hole

Claims (2)

[Scope of utility model registration request] 1. An adjusting bolt (B) screwed into a screw hole (1) of a workpiece (W) is tightened to adjust its screwing position, and the screwing position after the adjustment is fixed. A tightening tool used for tightening a lock nut (N) on the adjusting bolt (B), which can be engaged with a head (h) of the adjusting bolt (B) so as not to rotate relative to it. T-type wrench (T having a bolt engaging part (4) at the tip of the shaft part (2)
r ₁ ) and the shaft portion (2) of the T-shaped wrench (Tr ₁ )
Includes a socket (S) penetrating slidably and rotatably and a torque wrench (Tr ₂ ) connected to a base portion (6) of the socket (S), and a tip portion (5) of the socket (S).
The tightening is characterized in that a receiving port (5a) capable of receiving the bolt engaging portion (4) in a relatively rotatable manner and fitting into the lock nut (N) in a relatively non-rotatable manner is formed. Attached tool. 2. The torque wrench (Tr ₂ ) is fitted with a wrench body (9) having a handle portion (9a) at a base end portion thereof, and an outer periphery of a base portion (6) of the socket (S) so as not to rotate relative to each other. An engaging portion (10) having an engaging hole (10a) to be fitted and rotatably fitted to the tip end portion of the wrench body (9), the engaging portion (10) and the wrench body ( 9. The tightening tool according to claim 1, which is a box-type wrench with a ratchet, including a ratchet mechanism (R) interposed between the tightening tool and the ratchet mechanism.