JPH0438204Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an expansion valve pipe assembly device for piping to a heat exchanger mounted on a vehicle such as an automobile.

(Prior Art) This type of expansion valve pipe assembly device forms a connection hole in a housing, and assembles and connects an inlet/outlet pipe and high-pressure and low-pressure pipes to the housing at the same time.

Housings with built-in expansion valves are known; for example, in the case of the expansion valve disclosed in Japanese Utility Model Application Publication No. 58-49168, there are two housings on opposite sides of the housing housing the expansion valves. A connecting hole is opened, and two pipes integrated at a flange are placed simultaneously on both sides of the housing, temporarily fixed, and then assembled by passing a bolt through and tightening with a nut.

For example, when installing the housing at a vehicle production factory, the pipes to be connected are placed on both sides of the housing, and while they are temporarily fixed, a bolt is passed through one side, and then a nut is screwed in from the other side.

(Problems to be Solved by the Invention) However, since such installation work is time consuming and cumbersome, there is a problem that assembly is laborious and time consuming.

Therefore, the object of this invention is to provide an expansion valve pipe assembling device that is easy to assemble and can shorten the assembling time.

(Means for solving the problem) The means for solving the problem with this invention is that a housing is formed with a pair of connection holes connected to the inlet and outlet pipes of the heat exchanger, and has an expansion valve built-in. , comprising a holding plate that presses the outlet pipe and the inlet pipe connected to one side of the pair of connection holes to the housing, and a connection member that connects the high pressure pipe and the low pressure pipe to the other side of the connection hole, In a pipe assembly device for an expansion valve that connects a high-pressure pipe and a low-pressure pipe to an inlet/outlet pipe via a housing with a built-in expansion valve, a bolt is fixed to the holding plate, and the bolt is inserted into the housing. A first insertion hole is formed in the bolt, and a biasing member is disposed on the bolt, one end of the biasing member is engaged with the housing, and the other end is engaged with a first nut screwed onto the bolt. A second insertion hole is formed in the connecting member, through which a bolt is passed, and the connecting member is assembled and fixed to the tip of the bolt. A second nut is screwed together.

(Function) Therefore, the bolt is passed through the first insertion hole of the housing, the biasing member is placed on the bolt, and then the first insertion hole is inserted.
Attach the holding plate to the housing by screwing together the nuts. When attaching the inlet/outlet pipe of the heat exchanger, the presser plate is pulled away from the housing against the biasing force of the biasing member to form a gap, and the inlet/outlet pipe is installed with the flange interposed in this gap. In this way, the inlet and outlet pipes can be temporarily assembled by simply separating the plate from the housing, that is, by one touch.

Next, the tip of the bolt is inserted into the second insertion hole formed in the connection member, and then the second nut is screwed and tightened to assemble the connection member to the housing. Therefore, in assembling the housing and the connecting member, since bolts are commonly used, the assembling is simple, and the assembling time can be shortened compared to the conventional method.

(Example) An example of this invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, a pipe assembly device 1 for an expansion valve according to an embodiment of this invention includes a housing 2 and a holding plate 3 to which the inlet and outlet pipes 4 and 5 of a heat exchanger are assembled, a low pressure pipe 21 and a high pressure pipe 21. A connecting block 6 to which a pipe 19 is connected is provided.

The housing 2 has a pair of connection holes 7 arranged side by side and connected to the inlet and outlet pipes 4 and 5, respectively.
a, 7b are formed, and these connection holes 7
An expansion valve 8 is housed so as to intersect with a and 7b. The expansion valve 8 is provided with a temperature-sensing section in the connection hole 7b on the low-pressure side, and the valve disposed in the connection hole 7a on the high-pressure side opens by a predetermined amount based on the temperature detected by the temperature-sensing section. There is.

Insertion hole portions 12a and 12b are provided above and below the housing 2, with insertion holes 11a and 11b formed on opposite sides.
a and 11b extend in the same direction as the connection holes 7a and 7b. The insertion holes 11a, 11b have one end that abuts the insertion hole portions 12a, 12b.

The holding plate 3 has an inlet/outlet pipe 4 on both sides,
U-shaped grooves 14a, 14b into which the pipes 5 are inserted are formed, and the flanges 15a, 15b engage with the holding plate 3 when the entrance/exit pipes 4, 5 are inserted into the insertion holes. There is.

The holding plate 3 has a pair of U-shaped grooves 14a,
Bolts 16a are placed in the upper and lower positions between 14b,
16b is erected. Bolts 16a, 16b
Its head is fixed to the holding plate 3 by welding. Each bolt 16a, 16b has a thread 17a, 17b formed at its tip. When the bolts 16a and 16b are passed through the first insertion hole, the coil springs 13a and 13b act as biasing members.
is fitted onto the outside, and then this coil spring 13
a, a first nut 18a that fastens the other end of 13b;
18b is screwed together. Therefore, the coil springs 13a, 13b are resiliently loaded between the first nut and the housing.

A holding groove 20 is formed in the connection block 6 in the same direction as the connection holes 7a and 7b so as to hold the high pressure pipe 19.
9a is adapted to engage the connecting block 6. On the other hand, a low pressure pipe 21 is connected to the upper part of the connecting block 6 by screwing.

The connection block 6 has second insertion holes 22a, 22 corresponding to the insertion hole 11a formed in the housing 2.
Second insertion portions 23a and 23b are provided with b formed therein. The aforementioned bolts 16a and 16b are inserted into the second insertion hole 22, and the second nut 2
4a and 24b to be fixed to the housing 2. The second insertion portions 23a, 23b have a recess 25 formed on the side facing the housing 2, and when the connecting block 6 is assembled to the housing 2, the first nuts 18a, 18b are inserted into the recess 25. It is now stored in the

In addition, in the figure, the reference numeral 26 is an O-ring.

In the above-described configuration, the first insertion holes 11a, 11b of the housing 2 and the coil spring 13
Bolts 16a and 16b are passed through a and 13b, and then first nuts 18a and 18b are screwed together and tightened against the urging force of coil springs 13a and 13b.

Next, when connecting the inlet/outlet pipes 4, 5 to the housing 2, as shown in FIG. A gap A is formed between the two. This gap A
3, the inlet/outlet pipes 4, 5 are fitted into the U-shaped grooves with the flanges 15a, 15b interposed between the gap A, as shown in FIG.
Then, as shown in FIG. 4, the inlet/outlet pipe 4,
5 to match the connection holes 7a, 7b of the housing 2, and then release them. Then, coil spring 1
Pressing plate 3 according to the urging force of 3a, 13b
presses the inlet/outlet pipes 4, 5 against the housing 2. That is, when installing the inlet/outlet pipes 4 and 5, the holding plate 3 is directly attached to the coil spring 13.
Since it is attached by simply pulling apart against the biasing force of the inlet and outlet pipes 4 and 5, the inlet and outlet pipes 4 and 5 can be temporarily assembled in a so-called one-touch operation.

Next, the high pressure pipe 19 is fitted into the holding groove 20 formed in the connecting block 6, and the flange 20 is engaged with the connecting block 6. Next, as shown in FIG.
a, 22b, and screw the second nuts 24a, 24b onto the tips thereof to fix them.

In this case, the connecting block 6 is connected by using the bolts 16a, 16b used to attach the housing and screwing the second nuts 24a, 24b thereto, so the bolts etc. for the connecting block 6 are specially designed. Since there is no need to use it, it is possible to reduce the number of parts without requiring much effort.

According to this embodiment, since assembly is easy, not only assembly in the manufacturing process but also installation and removal operations are simplified, for example, when the expansion valve needs to be replaced after being mounted on a vehicle.
In particular, since there is no space for work after it is mounted on a vehicle, the workability is poor, but according to this embodiment, the installation is simple and the work can be done easily.

(Effects of the invention) According to this invention, since the holding plate is separated from the housing by the urging force of the urging member and the inlet/outlet pipe is attached, the connection between the inlet/outlet pipe and the housing can be facilitated. Further, the housing can maintain its state by the biasing member, and temporary assembly is reliable.

Furthermore, since the same bolts are used to attach the housing when assembling the connecting block to the housing, the number of parts for assembling can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a pipe assembly device for an expansion valve according to an embodiment of this invention, Fig. 2 is a side view showing the assembled state of the housing and the holding plate, and Fig. 3 shows how the inlet and outlet pipes are attached to the housing. 4 is a side view showing the connection between the inlet/outlet pipe and the housing, and FIG. 5 is a side view showing the connection between the inlet/outlet pipe and the connecting block. DESCRIPTION OF SYMBOLS 1... Expansion valve pipe assembly device, 2... Housing, 3... Holding plate, 4... Inlet pipe, 5... Outlet pipe, 6... Connection block, 7
a, 7b... Connection hole, 8... Expansion valve, 11a, 1
1b...first insertion hole, 12a, 12b...second
Insertion hole portion, 13a, 13b...Coil spring (biasing member), 16a, 16b...Bolt, 1
8a, 18b...first nut, 24a, 24b
...Second Natsuto.

Claims (1)

[Scope of utility model registration request] A housing having a pair of connection holes connected to the inlet and outlet pipes of the heat exchanger and containing an expansion valve, and an outlet pipe and an inlet pipe connected to one side of the pair of connection holes are pressed against the housing. An expansion valve comprising a holding plate and a connecting member for connecting a high pressure pipe and a low pressure pipe on the other side of the connection hole, and connecting the high pressure pipe and the low pressure pipe to the inlet/outlet pipe via a housing incorporating the expansion valve. In the pipe assembly device, a bolt is fixed to the holding plate, a first insertion hole through which the bolt is inserted is formed in the housing, a biasing member is disposed on the bolt, and the bolt is fixed to the housing. One end of the member is locked to the housing, and the other end is locked to a first nut screwed onto the bolt to urge the housing toward the holding plate, and the bolt passes through the connecting member. A pipe assembly device for an expansion valve, characterized in that a second insertion hole is formed, and a second nut for assembling and fixing a connecting member is screwed into the tip of the bolt.