Gas compressor

Abstract

To provide a pneumatic compressor capable of protecting a site of a cover part in which a vent hole is provided, without deteriorating cooling efficiency.SOLUTION: A gas compressor 1A comprises: a body part 6 having a compression part, a driving part, a ventilation part, and a storage part 5; a cover part 7 that covers at least a part of the body part 6; and a handle part 8 having a grip part 80. The cover part comprises a vent port 73 through which air flows when the ventilation part is driven by the driving part. The handle part 8 comprises a protective part 80c facing the vent port 73. Between the protective part 80c and the vent port 73, a space is provided for air to pass through.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a gas compressor that compresses gas. [Background technology]

[0002] A gas compressor, also known as an air compressor, is configured with a compression section, an electric motor, and a fan enclosed in a cover. The cover of an air compressor must have a vent for internal cooling, but the vent is configured with a grid or row of slits to prevent the entry of foreign objects (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-71467 Summary of the Invention [Problem to be solved by the invention]

[0004] The vents in the cover of an air compressor have narrower sections between the slits, reducing the strength of the cover compared to sections without vents. Portable air compressors used at construction sites, for example, are prone to impacts from contact with tools or building materials. This makes the vents in the cover vulnerable to damage. One possible solution is to reduce the opening area of ​​the slits in the vents, widening the gap between the slits and improving the strength. However, reducing the opening area of ​​the slits reduces cooling efficiency.

[0005] The present invention has been made to solve such problems, and aims to provide a gas compressor that can protect the area of ​​the cover where the air vent is provided without reducing cooling efficiency. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a compressor that compresses gas, a drive unit that drives the compressor, a blower unit that is driven by the drive unit, a main body that has the compressor, drive unit, and blower unit, a cover that covers at least a part of the main body, and a handle unit that has a grip, wherein the cover unit has an air vent through which air flows when the blower unit is driven by the drive unit, and the air vent is provided opposite to the direction of the rotation axis of the blower that is rotated by the drive unit, and the handle unit has a protective part facing the air vent, and the protective part is provided apart from the air vent. The upper end of the protection part has an upper end part that is fixed to the upper surface part of the cover part, and the lower end of the protection part has a lower end part that is fixed to the main body part. It is a gas compressor. [Effects of the Invention]

[0007] In the present invention, the handle part covers a part of the vent with the outside of the cover part, so that the handle part prevents objects from hitting the vent. Also, by providing the protective part at a distance from the vent, a space is formed between the handle part and the vent, so that the handle part does not obstruct the flow of air through the vent. This allows the handle part to protect the vent without reducing cooling efficiency, compared to a configuration in which the vent is directly reinforced. [Brief explanation of the drawings]

[0008] [Figure 1A] 1 is a perspective view showing an example of an air compressor according to an embodiment of the present invention. [Figure 1B] 1 is a perspective view showing an example of an air compressor according to an embodiment of the present invention. [Figure 2] 1 is a perspective view showing an example of an air compressor according to an embodiment of the present invention with a cover removed. [Figure 3A] FIG. 10 is a perspective view showing a modified example of the air compressor of the present embodiment. [Figure 3B] FIG. 10 is a perspective view showing a modified example of the air compressor of the present embodiment. [Figure 3C] FIG. 10 is a perspective view showing a modified example of the air compressor of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air compressor as a gas compressor of the present invention will be described below with reference to the drawings.

[0010] <Configuration example of air compressor according to this embodiment> 1A and 1B are perspective views showing an example of an air compressor according to the present embodiment, and FIG. 2 is a perspective view showing the example of the air compressor according to the present embodiment with a cover removed.

[0011] The air compressor 1A includes a compression section 2 that compresses air as an example of a gas, a drive section 3 that drives the compression section 2, a blower section 4 that is driven by the drive section 3 and generates an air flow that cools the compression section 2 and the drive section 3, and a storage section 5 that stores the air (compressed air) compressed in the compression section 2.

[0012] The air compressor 1A also includes a main body 6 having a compression unit 2, a drive unit 3, a blower unit 4, and a storage unit 5, a cover 7 that covers at least a portion of the main body 6, and a handle 8 that can be held by hand. The up-down direction of the air compressor 1A is determined taking into consideration how it will be used when installed on the ground, a building floor, or other such installation location.

[0013] The compression section 2 includes a primary cylinder 20a and a secondary cylinder 20b. The primary cylinder 20a and the secondary cylinder 20b each include a piston (not shown). In the compression section 2, the pistons in the primary cylinder 20a and the secondary cylinder 20b are connected to a crankshaft (not shown) that is rotatably supported in a crankcase 21. In the compression section 2, the pistons reciprocate as the crankshaft rotates, and the reciprocating movement of the pistons generates compressed air. In the compression section 2, the air compressed in the primary cylinder 20a is further compressed in the secondary cylinder 20b, generating compressed air at a higher pressure.

[0014] The drive unit 3 is an electrically driven motor (electric motor). The drive unit 3 has a rotating shaft 30, one side of which is connected to the crankshaft of the compression unit 2 (not shown).

[0015] The blower unit 4 is composed of an axial flow fan and is attached to the other side of the shaft 30 of the drive unit 3. The blower unit 4 is driven to rotate by the drive unit 3, thereby generating a flow of air from the blower unit 4 toward the drive unit 3 and the compression unit 2.

[0016] The storage unit 5 includes a plurality of tanks 50 that store compressed air. The radial direction of the cylindrical shape of the tanks 50 is the short side direction, and the direction perpendicular to the radial direction (short side direction) is the long side direction. In this example, the storage unit 5 includes two tanks 50, and the two tanks 50 are arranged side by side in the radial direction with the long sides of the tanks 50 parallel to each other.

[0017] In the main body 6, a crankshaft (not shown) of the compression unit 2 is connected to one side of the shaft 30 of the drive unit 3, and the blower unit 4 is attached to the other side of the shaft 30 of the drive unit 3. As a result, in the main body 6, the direction in which the shaft 30 of the drive unit 3 extends becomes the rotational axis direction 40 of the blower unit 4, and the compression unit 2, drive unit 3, and blower unit 4 are arranged coaxially along the rotational axis direction 40 of the blower unit 4. Furthermore, the longitudinal direction of each tank 50 is arranged parallel to the rotational axis direction 40 of the blower unit 4 (the extension direction of the shaft 30 of the drive unit 3). Note that the longitudinal length of the tank 50 is configured to be longer than the length over which the compression unit 2, drive unit 3, and blower unit 4 are aligned along the rotational axis direction 40 of the blower unit 4. As a result, when the longitudinal direction of each tank 50 is arranged in a direction parallel to the rotation axis direction 40 of the blower unit 4, it is easy to secure space for providing the handle unit 8 above both ends along the longitudinal direction of the tank 50, and it is also easy to secure space between the handle unit 8 and the cover unit 7.

[0018] When the blower unit 4 is driven to rotate by the drive unit 3, the main body 6 generates an air flow from the blower unit 4 to the drive unit 3 and the compression unit 2 along the rotation axis direction 40 of the blower unit 4, shown by the dashed line in Figure 2.

[0019] The main body 6 is provided with a compressed air outlet 60 that supplies compressed air stored in a tank 50 in the storage unit 5 to a tool (not shown). The compressed air outlet 60 is connected to the tank 50 by a pipe 61. In this example, the air compressor 1A is provided with two compressed air outlets 60: a compressed air outlet 60a for supplying high-pressure compressed air, and a compressed air outlet 60b for supplying relatively low-pressure compressed air. The compressed air outlets 60a and 60b are each provided with a pressure reducing valve 62 for supplying compressed air reduced to a desired pressure to the tool, and a dial 63 for adjusting the pressure.

[0020] The cover portion 7 includes an upper surface portion 70, a first side portion 71a and a second side portion 71b provided on both sides facing the rotational axis direction 40 of the blower portion 4, a third side portion 71c and a fourth side portion (not shown) provided on both sides facing a direction perpendicular to the rotational axis direction 40 of the blower portion 4.

[0021] The cover unit 7 has a shape that covers the entire compressor unit 2, driver unit 3, and blower unit 4, as well as the upper part of the storage unit 5, with a top surface unit 70, a first side unit 71a, a second side unit 71b, a third side unit 71c, and a fourth side unit (not shown). The cover unit 7 is fixed with screws 74 to mounting units 52a provided on the peripheral surface of the tank 50 of the storage unit 5.

[0022] The cover portion 7 has a vent hole forming portion 72a on a first side portion 71a, which is one side portion facing the rotation axis direction 40 of the blower portion 4. The vent hole forming portion 72a is configured as a recessed portion where the upper surface portion 70 and the first side portion 71a are connected.

[0023] The cover 7 also has a vent hole forming portion 72b on the second side portion 71b, which is the other side portion facing the rotation axis direction 40 of the blower 4. The vent hole forming portion 72b is configured as a recessed portion where the upper surface portion 70 and the second side portion 71b are connected.

[0024] The cover 7 has ventilation holes 73 (first ventilation holes 73a) in the ventilation hole forming portion 72a. The first ventilation holes 73a are configured by providing a plurality of slit-shaped openings that penetrate the front and back of the first side portion 71a.

[0025] The cover 7 also has a ventilation hole 73 (second ventilation hole 73b) in the ventilation hole forming portion 72b. The second ventilation hole 73b is configured by providing a plurality of slit-shaped openings that penetrate the front and back of the second side portion 71b.

[0026] As a result, vents 73 (first vent 73a, second vent 73b) are formed on both sides facing the rotation axis direction 40 of the blower 4. Inside the main body 6, air flows from the blower 4 toward the drive unit 3 and the compressor 2, so the first vent 73a facing the blower 4 serves as an intake port, and the second vent 73b facing the compressor 2 serves as an exhaust port.

[0027] The handle portion 8 includes a handle portion 8a that covers a portion of the first ventilation port 73a, and a handle portion 8b that covers a portion of the second ventilation port 73b.

[0028] The handle portion 8a and the handle portion 8b each have an upper end portion 80a fixed to the upper surface portion 70 of the cover portion 7, a lower end portion 80b fixed to the storage portion 5 that constitutes the main body portion 6, two protective portions 80c that connect the upper end portion 80a and the lower end portion 80b and face the first ventilation port 73a and the second ventilation port 73b, and a grip portion 80d that can be held by hand.

[0029] The upper end 80a connects the upper ends of the two protective portions 80c so that the distance between them is approximately equal to the combined width of the first vent 73a and the second vent 73b. The lower end 80b connects the lower ends of the two protective portions 80c so that the distance between them is approximately equal to the combined width of the first vent 73a and the second vent 73b.

[0030] The protective portion 80c has a bent portion 80e formed by bending a portion between the upper end portion 80a and the lower end portion 80b. The protective portion 80c extends substantially vertically upward from the lower end portion 80b and then extends toward the inside of the main body portion 6 at the bent portion 80e, at which end the upper end portion 80a is provided. As a result, the portion between the upper end portion 80a and the bent portion 80e of the protective portion 80c constitutes an upper surface protective portion 80f that faces the upper portions of the first ventilation port 73a and the second ventilation port 73b, and the portion between the lower end portion 80b and the bent portion 80e constitutes a side surface protective portion 80g that faces the first ventilation port 73a and the second ventilation port 73b. In the handle portions 8a and 8b, side protection portions 80g extend substantially vertically upward from the lower end portions 80b, and top protection portions 80f extend inward from the bent portions 80e toward the top surface portion 70 of the cover portion 7.

[0031] The gripping portion 80d is shaped to connect the two protective portions 80c, and in this example, connects the bent portions 80e of the protective portions 80c.

[0032] An upper end 80a of the handle portion 8a is fixed to one end of the upper surface portion 70 of the cover portion 7 by a screw 82. In addition, a lower end 80b of the handle portion 8a is fixed together with the cover portion 7 by a screw (not shown) to an attachment portion 52b provided at one end of the tank 50 in the storage portion 5 in the longitudinal direction.

[0033] When the handle portion 8a is attached to the cover portion 7 and the main body portion 6 (storage portion 5), the two protective portions 80c and the grip portion 80d cover part of the front side of the first vent port 73a along the rotation axis direction 40 of the blower portion 4. The protective portion 80c has an upper surface protective portion 80f between the upper end portion 80a and the bent portion 80e facing the upper part of the first vent port 73a, and a side surface protective portion 80g between the lower end portion 80b and the bent portion 80e facing the first vent port 73a.

[0034] As a result, the handle portion 8a protects the first ventilation opening 73a by preventing any object from hitting the side or top surface of the first ventilation opening 73a.

[0035] Furthermore, in the handle portion 8a, the protective portion 80c is convex at the bent portion 80e relative to the concave vent hole forming portion 72a, and the protective portion 80c (upper surface protective portion 80f and side surface protective portion 80g) is provided at a distance from the first vent hole 73a, forming a space between the protective portion 80c and the first vent hole 73a. As a result, the handle portion 8a does not obstruct the flow of air sucked into the cover portion 7 from the first vent hole 73a.

[0036] Therefore, compared to a configuration in which the first ventilation port 73a is directly reinforced, the first ventilation port 73a can be protected by the handle portion 8a without reducing the opening area of ​​the first ventilation port 73a.

[0037] An upper end 80a of the handle portion 8b is fixed to the other end of the upper surface portion 70 of the cover portion 7 with a screw 82. In addition, a lower end 80b of the handle portion 8b is fixed together with the cover portion 7 to an attachment portion 52b provided in the storage portion 5 at the other end of the tank 50 in the longitudinal direction with a screw (not shown).

[0038] When the handle portion 8b is attached to the cover portion 7 and the main body portion 6 (storage portion 5), the two protective portions 80c and the grip portion 80d cover part of the front side of the second vent port 73b along the rotation axis direction 40 of the blower portion 4. The protective portion 80c has an upper surface protective portion 80f between the upper end portion 80a and the bent portion 80e facing the upper part of the second vent port 73b, and a side surface protective portion 80g between the lower end portion 80b and the bent portion 80e facing the second vent port 73b.

[0039] As a result, the handle portion 8b protects the second ventilation opening 73b by preventing any object from hitting the side or top surface of the second ventilation opening 73b.

[0040] Furthermore, in the handle portion 8b, the protective portion 80c is convex at the bent portion 80e relative to the concave vent hole forming portion 72b, and the protective portion 80c (upper surface protective portion 80f and side surface protective portion 80g) is provided at a distance from the second vent hole 73b, forming a space between the protective portion 80c and the second vent hole 73b. As a result, the handle portion 8b does not obstruct the flow of air discharged from the second vent hole 73b.

[0041] Therefore, compared to a configuration in which second vent hole 73b is directly reinforced, second vent hole 73b can be protected by handle portion 8b without reducing the opening area of ​​second vent hole 73b.

[0042] To make the heavy air compressor 1A portable, the handle portions 8a and 8b are made strong by increasing the thickness of each part. The handle portions 8a and 8b are also strong because the two protective portions 80c are connected by a grip portion 80d at a bent portion 80e between the upper end portion 80a and the lower end portion 80b. The upper end portions 80a of the handle portions 8a and 8b are connected to the upper surface portion 70 of the cover portion 7.

[0043] In a cover for an air compressor having a vent hole, if the area around the vent hole is not protected by a handle, for example, when a load is applied from above the cover hole, the area around the vent hole, which has low strength, will deform particularly significantly and be easily damaged. In contrast, by connecting the upper surface 70 of the cover hole 7 and the lower end of the cover hole that connects to the storage section 5 with the handle sections 8a and 8b, which have sufficient strength, the rigidity of the cover hole 7 is increased and damage to the cover hole due to deformation can be suppressed.

[0044] Furthermore, the handle portions 8a and 8b have upper surface protection portions 80f that extend obliquely upward from the bent portion 80e relative to the horizontal direction, and the upper end portions 80a are fixed to the upper surface portion 70 of the cover portion 7. This allows the load applied to the upper surface portion 70 of the cover portion 7 to be transmitted to the storage portion 5 to which the lower end portions 80b of the handle portions 8a and 8b are fixed, while reducing the load on the handle portions 8a and 8b.

[0045] The top surface 70 of the cover 7 has a shape that has a flat surface of a predetermined size at least in part, and can be used as a platform for placing tools, etc. In addition, uneven ribs 70a are provided on the top surface 70 of the cover 7 to increase the strength of the top surface 70. As a result, when a tool, etc. is placed on the top surface 70 of the cover 7, the load of the tool, etc., is not absorbed by deformation of the top surface 70 of the cover 7, but is transmitted to the handle portions 8a and 8b, thereby suppressing damage to the cover 7. Furthermore, if the top surface protection portions 80f of the handle portions 8a and 8b are shaped to extend horizontally, the area that forms a flat surface on the top surface 70 of the cover 7 can be expanded.

[0046] <Modifications of the Air Compressor of the Present Embodiment> 3A, 3B, and 3C are perspective views showing modified examples of the air compressor of the present embodiment.

[0047] Air compressor 1B shown in Fig. 3A includes a connecting member 81a connecting an upper end 80a of handle portion 8a that covers a portion of first vent port 73a to an upper end 80a of handle portion 8b that covers a portion of second vent port 73b. Air compressor 1C shown in Fig. 3B includes a connecting member 81b connecting an upper end 80a of handle portion 8a that covers a portion of first vent port 73a to an upper end 80a of handle portion 8b that covers a portion of second vent port 73b.

[0048] The connecting members 81a, 81b are fixed to the upper surface 70 of the cover unit 7 together with the upper ends 80a of the handle portions 8a, 8b by screws 82. As a result, the upper ends 80a of the handle portions 8a and 8b are connected via the upper surface 70 of the cover unit 7 and the connecting members 81a, 81b. This ensures the strength of the pair of handle portions 8a and 8b, which are arranged opposite each other in the rotation axis direction 40 of the blower unit 4. Furthermore, by fixing the handle portions 8a, 8b and the connecting members 81a, 81b to the upper surface 70 of the cover unit 7, the rigidity of the cover unit 7 is increased, and damage due to deformation of the cover unit 7 can be suppressed. Note that the connecting member 81b is made of a flat plate-shaped member having a predetermined plane surface, which allows a flat portion to be formed on the upper surface of the air compressor 1C, and can be used as a platform for placing tools, etc.

[0049] 3C, the handle portion 8a, which covers a portion of the first vent port 73a, and the handle portion 8b, which covers a portion of the second vent port 73b, are integrally formed with a connecting portion 80h. The connecting portion 80h connects the upper end portion 80a of the handle portion 8a to the upper end portion 80a of the handle portion 8b, and covers the upper surface portion 70 of the cover portion 7.

[0050] As a result, handle portion 8a and handle portion 8b are integrally connected, thereby ensuring the strength of the pair of handle portions 8a and 8b that are provided opposite each other in rotation axis direction 40 of blower unit 4. Note that connecting portion 80h is made up of a flat plate-shaped member having a flat surface of a predetermined size, so that a part having a flat surface can be formed on the upper surface of air compressor 1D, and this can be used as a stand for placing tools, etc. [Explanation of symbols]

[0051] 1A, 1B, 1C, 1D... air compressor, 2... compression section, 20a... primary cylinder, 20b... secondary cylinder, 21... crankcase, 3... drive section, 30... shaft, 4... blower section, 5... storage section, 50... tank, 52a... mounting section, 6... main body section, 60 (60a, 60b)... compressed air outlet, 61... piping, 62... pressure reducing valve, 63... dial, 7... cover section, 70... upper surface section, 71a... first side portion, 71b...second side portion, 71c...third side portion, 71d...fourth side portion, 72a...vent hole forming portion, 72b...vent hole forming portion, 73a...first vent hole, 73b...second vent hole, 8(8a, 8b)...handle portion, 80a...upper end portion, 80b...lower end portion, 80c...protective portion, 80d...gripping portion, 80e...bending portion, 80f...upper surface protective portion, 80g...side surface protective portion, 80h...connecting portion, 81a, 81b...connecting member

Claims

1. a compression section that compresses the gas; a drive unit that drives the compression unit; a blower driven by the drive unit; a main body portion having the compression portion, the drive portion, and the blower portion; a cover portion that covers at least a portion of the main body portion; A handle portion having a grip portion; Equipped with the cover portion includes an air vent through which air flows when the blower portion is driven by the drive portion; the vent hole is provided opposite to the rotation axis direction of the blower unit that is rotated by the drive unit, The handle portion includes a protective portion facing the vent hole, the protective portion being spaced apart from the vent hole, an upper end portion of the protective portion being fixed to the upper surface portion of the cover portion, and a lower end portion of the protective portion being fixed to the main body portion. Gas compressor.

2. the protective portion includes an upper surface protective portion facing an upper portion of the ventilation hole and a side surface protective portion facing the ventilation hole, The handle portion has the upper surface protection portion spaced apart from the vent hole, and the side surface protection portion spaced apart from the vent hole.

2. The gas compressor according to claim 1.

3. The handle portion is provided with two protective portions that match the width of the ventilation opening.

2. The gas compressor according to claim 1.

4. The handle portion is provided on both sides opposite to the rotation axis direction of the blower portion.

2. The gas compressor according to claim 1.

5. The handle portion is provided with a connecting portion that covers and connects to at least a portion of the upper surface of the cover portion.

5. A gas compressor according to claim 4.

6. The handle portion is connected by a connecting member that covers at least a part of the upper surface of the cover portion.

5. A gas compressor according to claim 4.

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