CN209820771U - Clamping tool for diesel engine test machine - Google Patents

Abstract

The utility model discloses a clamping tool for a diesel engine test machine, which belongs to the technical field of diesel engine testing, and solves the problem that the inner thread of the screw hole of the backing plate of a flat car needs to be replaced due to damage; the tooling includes a backing plate and a pressure plate of a flat car, The pressure plate is connected with the backing plate of the flat car through a screw rod, and a nut placement hole is arranged at the bottom of the backing plate of the flat car, and a detachable connecting nut is arranged in the nut placement hole. The utility model can effectively solve the problem that the inner thread of the screw hole of the backing plate of the flat car needs to be replaced due to damage, improves the work efficiency and saves the manufacturing cost.

Description

Clamping tool for diesel engine test machine

technical field

The utility model relates to the technical field of diesel engine testing, in particular to a clamping tool for diesel engine testing.

Background technique

Before the diesel engine leaves the factory, it needs to carry out relevant performance tests and experiments, which is conducive to discovering product problems in advance and mastering product performance data, so that the test data can be analyzed later, and it can also effectively prevent batch quality problems after the product leaves the factory and avoid The interests of the company are damaged and unnecessary maintenance costs are borne. During the performance test of the diesel engine, it is necessary to fix the diesel engine feet on the test stand to test the working performance of the diesel engine. On the test stand, a flat car backing plate matched with these diesel engine feet is installed, and through the screw The diesel engine foot and the flat car backing plate are connected together with the pressing plate, and the flat car backing plate is provided with threaded holes matching the screw rods. Due to the vibration of the diesel engine during operation and the repeated disassembly of the diesel engine foot from the test stand, the internal thread of the threaded hole on the backing plate of the flat car will be irreparably damaged. At this time, the flat car must be replaced The backing plate has high cost and large waste, and is not conducive to the improvement of test machine efficiency.

Utility model content

The purpose of the utility model is to provide a clamping tool for diesel engine testing. Using the clamping tool can effectively solve the problem that the inner thread of the threaded hole of the flat car backing plate is damaged and needs to be replaced, and has the advantages of improving work efficiency and saving manufacturing costs. features.

The technical scheme that the utility model adopts is as follows:

A clamping tool for a diesel engine test machine, comprising a flat car backing plate and a pressure plate, the pressing plate is connected to the flat car backing plate through a screw, the bottom of the flat car backing plate is provided with a nut placement hole, and the nut placement hole There are detachable connecting nuts inside.

Furthermore, a transition hole connected to the nut placement hole is provided on the top of the backing plate of the flat car, and the transition hole and the nut placement hole are located on the same axis.

Further, the nut placement hole is in the shape of a regular hexagon, and is in clearance fit with the connecting nut.

Further, the depth of the nut placement hole is greater than the width of the connecting nut.

Further, the thread specification of the connecting nut is the same as that of the screw rod.

Further, the pressing plate is provided with a fixing hole adapted to the screw, and a locking nut is screwed on the screw above the pressing plate.

Further, the diameter of the fixing hole is larger than the outer diameter of the screw.

Compared with the prior art, the utility model has the beneficial effects that: through the combined use of the flat car backing plate transition hole and the nut placement hole, and the cooperation with the screw, the damage to the threaded hole of the flat car backing plate in the prior art can be effectively solved Unfavorable conditions, so as to improve work efficiency and save manufacturing costs.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is the assembly structure schematic diagram of the present utility model;

Fig. 2 is a front view enlarged structural schematic diagram of the backing plate of the flat car in Fig. 1;

Fig. 3 is a top view enlarged structural schematic diagram of the backing plate of the flat car in Fig. 1;

Among the figure, 1, flat car backing plate, 11, transition hole, 12, nut placement hole, 2, connecting nut, 3, screw rod, 4, pressing plate, 5, locking nut.

Detailed ways

The technical solution of the present utility model will be further described in detail below in combination with specific implementation methods, but this does not constitute any limitation to the present utility model.

Referring to Figures 1 to 3, a clamping tool for a diesel engine test machine of the present invention includes a flat car backing plate 1 and a pressing plate 4, and the pressing plate 4 is connected to the flat car backing plate 1 through a screw rod 3, The bottom of the flat car backing plate 1 is provided with a nut placement hole 12, the nut placement hole 12 is provided with a detachable connecting nut 2, and the top of the flat car backing plate 1 is provided with a The transition hole 11 is located on the same axis as the nut placement hole 12 . The nut installation hole 12 is in the shape of a regular hexagon, and is in clearance fit with the connection nut 2 . Preferably, the fit clearance between the nut installation hole 12 and the connection nut 2 is 1-2 mm. The depth of the nut placement hole 12 is greater than the width of the connecting nut 2. Preferably, the depth of the nut placement hole 12 is greater than the width of the connecting nut 2 by 1-2 mm, and the thread specification of the connecting nut 2 is the same as that of the screw rod. 3 same. Through the fit gap between the nut placement hole 12 and the connection nut 2, it is more convenient to install and disassemble the connection nut 2 in the nut placement hole 12, and at the same time, ensure that the screw rod 3 cooperates with the connection nut 2 The tightening degree prevents the pressure plate 4 from loosening during the diesel engine test run. When the internal thread of the connecting nut 2 is damaged, only the connecting nut 2 needs to be replaced to re-realize the clamping function of the tool, thereby achieving the purpose of improving work efficiency and saving manufacturing costs.

The pressing plate 4 is provided with a fixing hole compatible with the screw rod 3, and a lock nut 5 is screwed on the screw rod 3 above the pressing plate 4, and the diameter of the fixing hole is larger than the outer diameter of the screw rod 3, preferably , the diameter of the fixing hole is 1-2mm larger than the outer diameter of the screw 3, which can offset the matching error caused by the cooperation between the pressure plate 4 and the screw 3 to a certain extent, so that the pressure plate 4 can be better Squeeze the diesel engine foot. Preferably, embossing is provided on the bottom surface of the pressing plate 4 and the top surface of the backing plate 1 of the flat car, so that the pressing plate 4 and the backing plate 1 of the flat car are clamped more tightly to prevent shaking, and the top surface of the pressing plate 4 is also provided with patterns to effectively prevent Lock nut 5 is loose.

When the above-mentioned flat car backing plate 1 is in use, there are four pieces in total, which respectively correspond to the positions of the four machine feet of the diesel engine. The relative positions of the diesel engine and the test machine stand are established and fixed by these four flat car backing plates 1 . When fixing, the connecting nut 2 is pre-installed in the nut placement hole 12 of the backing plate 1 of the flat car, and then the screw 3 is screwed into the connecting nut 2 through the transition hole 11, and then passed through the pressing plate The fixing hole on 4 passes through the screw rod 3, presses down the top surface of the diesel engine foot, and tightens the lock nut 5 to realize the fastening of the diesel engine foot.

The above descriptions are only preferred embodiments of the present utility model, and any modifications, equivalent replacements and improvements made within the spirit and principle scope of the present utility model shall be included in the protection scope of the present utility model.

Claims (7)

1. a kind of clamping frock of diesel engine test machine comprises flat car backing plate (1) and pressing plate (4), and described pressing plate (4) is connected with described flat car backing plate (1) by screw rod (3), and its The feature is that: the bottom of the backing plate (1) of the flat car is provided with a nut placement hole (12), and a detachable connecting nut (2) is arranged in the nut placement hole (12). 2. A clamping tool for a diesel engine test machine according to claim 1, characterized in that: the top of the flat car backing plate (1) is provided with a transition hole ( 11), the transition hole (11) and the nut placement hole (12) are located on the same axis. 3. A clamping tool for a diesel engine test engine according to claim 2, characterized in that: the nut placement hole (12) is in the shape of a regular hexagon, and is in clearance fit with the connecting nut (2). 4. A clamping tool for a diesel engine test machine according to claim 3, characterized in that: the depth of the nut placement hole (12) is greater than the width of the connecting nut (2). 5. A clamping tool for a diesel engine test engine according to claim 4, characterized in that: the thread specification of the connecting nut (2) is the same as that of the screw rod (3). 6. A clamping tool for a diesel engine test machine according to claim 1, characterized in that: the pressing plate (4) is provided with a fixing hole matching the screw (3), and the pressing plate (4) ) is screwed with a lock nut (5) on the screw rod (3) above. 7. A clamping tool for a diesel engine test machine according to claim 6, characterized in that: the diameter of the fixing hole is larger than the outer diameter of the screw (3).