Vacuum pump

Abstract

The utility model relates to a vacuum pump which comprises a vacuum pump body and a battery pack, the vacuum pump body comprises a shell, and the battery pack is detachably connected to the shell; the motor assembly is accommodated in the shell; the pump assembly is driven by the motor assembly and used for generating pressure difference so as to exhaust gas in a target space; the handle is connected to the shell, and the handle is provided with a holding section used for holding; the battery pack and the pump assembly are located on the two opposite sides of the motor assembly in the lengthwise extending direction of the vacuum pump correspondingly. The handle and the shell are integrally formed, and when the vacuum pump is horizontally placed on the horizontal plane, the projection of the holding section and the projection of the pump assembly on the horizontal plane are at least partially overlapped. According to the vacuum pump provided by the invention, the problem of unbalanced holding of a machine is solved, and the holding comfort of a user is improved.

Description

Technical Field

[0001] The utility model relates to a vacuum pump. Background Art

[0002] A vacuum pump is a device that uses mechanical, physical, chemical or physical-chemical methods to generate, improve and maintain vacuum in a closed space. It is widely used in refrigeration, pharmaceutical chemicals, electronic technology, vacuum drying and other fields. The vacuum pump used in the field of air conditioning and refrigeration has high requirements for portability due to the stringent requirements of the work location (involving high-altitude work). For this reason, vacuum pumps used in the above fields are usually powered by lithium battery packs. At the same time, this type of machine is equipped with a handle to facilitate users to carry it by hand when moving to another work location. Summary of the invention

[0003] In view of this, the present application provides a vacuum pump to solve the problems of high manufacturing and assembly costs of traditional vacuum pumps and poor user holding experience.

[0004] The present application provides a vacuum pump, which includes: a vacuum pump body and a battery pack; wherein the vacuum pump body includes: a shell, the battery pack is detachably connected to the shell; a motor assembly, the motor assembly is accommodated in the shell; a pump assembly, driven by the motor assembly, and used to generate a pressure difference to discharge the gas in the target space; a handle, connected to the shell, the handle having a gripping section for gripping; the battery pack and the pump assembly are respectively located on opposite sides of the motor assembly along the longitudinal extension direction of the vacuum pump; the handle is integrally formed with the shell, and when the vacuum pump is placed horizontally on a horizontal plane, the projections of the gripping section and the pump assembly on the horizontal plane at least partially overlap.

[0005] In a possible implementation, the vacuum pump body further includes a pump body shell, the pump body shell accommodates the pump assembly, and the pump body shell and the housing are made of different materials.

[0006] In a possible implementation manner, the material strength of the pump body shell is greater than the material strength of the shell.

[0007] In a possible implementation manner, the gripping section is extended along a longitudinal extension direction of the vacuum pump.

[0008] In a possible embodiment, the vacuum pump body has a first center of gravity, and the vacuum pump has a second center of gravity; in the longitudinal extension direction of the vacuum pump, the ratio of the distance between the first center of gravity and the second center of gravity from the center point of the gripping section to the total length of the gripping section is less than or equal to 0.3.

[0009] In a possible implementation, in the longitudinal extension direction of the vacuum pump, the ratio of the distance between the first center of gravity and the second center of gravity from the center point of the gripping section to the total length of the gripping section is less than or equal to 0.16.

[0010] In a possible implementation, in the longitudinal extension direction of the vacuum pump, the total length of the gripping section is greater than or equal to 90 mm and less than or equal to 122.2 mm.

[0011] In a possible implementation, in the longitudinal extension direction of the vacuum pump, a ratio L / S1 of the total length of the gripping section to the length of the vacuum pump body is less than or equal to 0.52 and greater than or equal to 0.33.

[0012] In a possible implementation, the handle further includes a connecting section connected to the shell, and the gripping section includes a first end and a second end that are oppositely disposed, the first end is connected to the connecting section, and the second end is a cantilever end.

[0013] In a possible embodiment, the handle also includes a first connecting section and a second connecting section connected to the shell, the grip section includes a first end away from the pump assembly and a second end close to the pump assembly, the first connecting section is connected to the first end, and the second connecting section is connected to the second end.

[0014] The vacuum pump provided by the present application has a handle integrally formed with the housing, and the projection of the handle grip section and the pump assembly on a horizontal plane are at least partially overlapped. Therefore, the vacuum pump provided by the present application not only has low manufacturing and assembly costs, but also can provide users with a comfortable gripping experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of this application. The illustrative implementation methods and descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of a vacuum pump according to one embodiment of the present application;

[0017] Figure 2 for Figure 1 The schematic diagram of the structure of the vacuum pump shown is a diagram in which the battery pack is removed and part of the shell is hidden;

[0018] Figure 3 for Figure 1 An exploded view of a pump assembly of a vacuum pump is shown;

[0019] Figure 4 for Figure 1 The vacuum pump shown is along Figure 1 Cross-sectional view along the yy direction;

[0020] Figure 5 for Figure 1 A front view of the vacuum pump shown with the battery pack removed and part of the housing hidden;

[0021] Figure 6 for Figure 1 A front view of a hidden portion of the housing of the vacuum pump is shown;

[0022] Figure 7 A front view of a vacuum pump without a battery pack according to another embodiment of the present application;

[0023] Figure 8 A front view of a vacuum pump without a battery pack according to another embodiment of the present application; DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0027] like Figure 1-Figure 4 As shown, some embodiments of the present application provide a vacuum pump 100. For the convenience of description, the following descriptions of the directions are all based on Figure 1 and Figure 4The upper, lower, left, right, front, and rear defined in the figure (when the vacuum pump 100 is placed horizontally on the horizontal plane H) are for reference. The longitudinal extension direction in the above text is the direction of the longest side of the vacuum pump 100, that is, Figure 1 and Figure 4 Left-right direction shown when placing.

[0028] The vacuum pump 100 includes: a vacuum pump body 110 and a battery pack 120; wherein, the vacuum pump body 110 includes: a shell 111, and the battery pack 120 is detachably connected to the shell 111; a motor assembly 112, and the motor assembly 112 is accommodated in the shell 111; a pump assembly 113, driven by the motor assembly 112, for generating a pressure difference to discharge the gas in the target space; a handle 114, connected to the shell 111, and the handle 114 has a gripping section 114a for gripping; the battery pack 120 and the pump assembly 113 are respectively located on opposite sides of the motor assembly 112 along the longitudinal extension direction of the vacuum pump 100; the handle 114 is integrally formed with the shell 111, and when the vacuum pump 100 is placed horizontally on a horizontal plane, the projections of the gripping section 114a and the pump assembly 113 on the horizontal plane H at least partially overlap.

[0029] The handle 114 of the vacuum pump 100 is integrally formed with the shell 111, which can reduce manufacturing costs. In addition, the grip section 114a and the projection of the pump assembly 113 on the horizontal plane H at least partially overlap, so that the grip section 114a overlaps with the center of gravity of the machine in the longitudinal extension direction, so that the user can have a comfortable holding experience.

[0030] The above-mentioned "integrated molding" process refers to the process of completing the molding of the entire part in one mold at one time. This process is relatively simple and low-cost. The handle 114 and the housing 111 are integrally molded, which can reduce the separate manufacturing cost and assembly cost of the handle 114.

[0031] like Figure 1 , Figure 2 As shown, the vacuum pump 100 further includes a base 116 for supporting the housing 111, the base 116 is connected to the bottom of the housing 111, and is longitudinally extended in the left-right direction. Optionally, the housing 111, the handle 114, and the base 116 are integrally formed into two half shells of substantially the same shape, and the two symmetrical half shells are connected in the front-to-back direction by screws and wrap the motor assembly 112.

[0032] The housing 111 is provided with an air inlet 117, and the gas in the target space is extracted by the pump assembly 113 through the air inlet 117. In some embodiments, the pump assembly 113 is a two-stage rotary vane vacuum pump, such as Figure 3As shown, it is composed of a first-stage pump assembly 113a, a second-stage pump assembly 113b and a fastener 113c. The first-stage pump assembly 113a and the second-stage pump assembly 113b are connected by the fastener 113c. The first-stage pump assembly 113a includes: a first-stage pump rotor 113a3, driven by the motor assembly 112; a rotor 113a2, which is arranged in a slot 113a31 of the first-stage pump rotor 113a3 and cooperates with the first-stage pump rotor 113a3 to generate a pressure difference; an elastic member 113a4, which is located between the first-stage pump rotor 113a3 and the rotor 113a2 to provide an elastic force; and a first-stage housing 113a1, which is used to form a pump cavity (the pump cavity is not shown in the figure) to accommodate the first-stage pump rotor 113a3 and the rotor 113a2. Under the elastic force of the elastic member 113a4, the rotor 113a2 slides freely in the slot 113a31. The primary pump rotor 113a3 is eccentrically mounted in the primary housing 113a1, and forms a variable volume during rotation through the sliding of the rotor 113a2, thereby generating a primary pressure difference.

[0033] Optionally, there are two rotary blades 113a2, which are symmetrically assembled in the slot 113a31. The rotary blade 113a2 is usually made of wear-resistant materials, such as composite materials or metal. The elastic member 113a4 can be set as a spring or a compression spring.

[0034] The second-stage pump assembly 113b is similar in principle and structure to the first-stage pump assembly 113a, and includes: a secondary pump rotor 113b2, driven by the primary pump rotor 113a3; a vane 113b3, which cooperates with the secondary pump rotor 113b2 to generate a pressure difference; a secondary housing 113b1, which is used to connect with the tail housing 113b4 to form a pump chamber (the pump chamber is not shown in the figure), accommodating the secondary pump rotor 113b2 and the vane 113b3; a small cover 113b5, which is connected to the tail housing 113b4 through a fastener 113b6, and the fastener 113b6 can be set as a threaded fastener such as a pin or a bolt, a screw, etc. In this embodiment, the number of fasteners 113c is 3, and more or less fasteners are also acceptable. The assembly method of the vane 113b3 and the secondary pump rotor 113b2 is the same as that of the first-stage pump assembly 113a. In the same principle as the first-stage pump assembly 113a, the second-stage pump assembly 113b generates a secondary pressure difference.

[0035] The primary housing 113a1, the secondary housing 113b1 and the tail housing 113b4 are connected through the fastener 113c to form a pump assembly housing 113d. The pump assembly housing 113d is usually made of heavier cast iron or aluminum alloy. The detailed description of the type and quantity of the fastener 113c is the same as the description of the fastener 113b6 above, and is not repeated here.

[0036] When the vacuum pump 100 is working, the motor assembly 112 drives the primary pump rotor 113a3 and the secondary pump rotor 113b2 to rotate. The rotation of the primary pump rotor 113a3 and the secondary pump rotor 113b2 generates a primary and secondary pressure difference. Under the action of the pressure difference, the gas in the target space is extracted through the air inlet 117, passes through the primary pump assembly 113a and the secondary pump assembly 113b in turn, and is discharged through the exhaust port 113b11 on the secondary housing 113b1. The two-stage design can improve the final vacuum degree and working efficiency of the vacuum pump 100.

[0037] The pump assembly 113 may be a double-stage rotary vane vacuum pump head structure of the present embodiment, or a single-stage rotary vane vacuum pump head structure with a similar principle but only one stage, or other types of vane pumps or positive displacement pumps, such as centrifugal pumps, vortex pumps, mixed flow pumps, axial flow pumps, reciprocating pumps, rotor pumps, etc. It only needs to be driven by a motor and provide the pressure difference power required for vacuuming.

[0038] In some embodiments, the vacuum pump body 110 further includes a pump housing 115, which accommodates the pump assembly 113, and the pump housing 115 and the housing 111 are made of different materials. Usually, the pump assembly 113 needs to be immersed in pump oil (pump oil is not shown in the figure) to cool and seal the pump assembly 113. In order to prevent oil leakage, the pump housing 115 is manufactured separately to accommodate the pump assembly 113 and the pump oil separately, and the pump assembly 113 is not accommodated through the housing 111, thereby ensuring the sealing of the space accommodating the pump assembly 113.

[0039] In some embodiments, the material strength of the pump body shell 115 is greater than the material strength of the shell 111. This arrangement allows the pump body shell 115 to better resist external impacts and prevent pump oil leakage caused by damage to the shell. At the same time, the shell 111 uses a material with lower strength, which can better balance the manufacturing cost. In some embodiments, the shell 111 uses ordinary plastic, and the pump body shell 115 uses aluminum with higher impact strength. In other embodiments, the pump body shell 115 can be made of other metals or non-metals with high material strength (such as carbon fiber reinforced composite materials, glass fiber reinforced plastics, ceramic materials, graphene materials, etc.) as long as the performance of resisting impact is met.

[0040] Furthermore, an oil mist filter 118 is connected to the pump housing 115 to filter impurities in the gas exhausted from the exhaust port 113b11 to prevent the vacuum pump 100 from polluting the surrounding environment during use.

[0041] The overall layout of the vacuum pump 100 is described below:

[0042] The battery pack 120 and the pump assembly 113 are arranged on opposite sides of the motor assembly 112 along the longitudinal extension direction of the vacuum pump 100. Because the three are the main weight sources of the vacuum pump 100, and the pump assembly 113 needs to be arranged side by side with the motor assembly 112, so that the motor assembly 112 rotates to drive the pump rotors 113d and 113e inside the pump assembly 113 to rotate coaxially. The three side by side can balance the weight in the left and right directions and make the machine structure compact.

[0043] The projections of the grip section 114a and the pump assembly 113 on the horizontal plane H at least partially overlap. Figure 1 and Figure 4 : When the vacuum pump 100 is placed horizontally on a horizontal plane, the gripping section and the pump body shell 115 are simultaneously projected onto the horizontal plane, and their projections will partially overlap by projection overlap S. Since the battery pack 120 is detachable, when the battery pack 120 is removed, the center of gravity of the vacuum pump 100 will shift toward the pump assembly 113, so that when the vacuum pump 100 removes the battery pack 120, the user can hold the handle 114 at one end close to the pump assembly 113, that is, hold the handle as much as possible in a gripping area that at least partially overlaps with the projection of the pump assembly 113 on the horizontal plane H, and when the vacuum pump 100 is installed with the battery pack 120, the user can hold the handle 114 at one end away from the pump assembly 113, so that the user can find a comfortable gripping position on the gripping section 114a regardless of whether the vacuum pump 100 is installed with or without the battery pack 120.

[0044] In some embodiments, the gripping section 114a is extended along the longitudinal extension direction of the vacuum pump 100. The gripping section 114a extends along the longitudinal extension direction to make the vacuum pump 100 more compact in the vertical direction. At the same time, when the user switches between the state with the battery pack 120 and the state without the battery pack 120, the user can adjust the position of the hand grip along the extension direction of the gripping section 114a to match the change of the center of gravity in the longitudinal extension direction. "Extending along the longitudinal extension direction" should not only be understood as being parallel to the longitudinal extension direction. The angle between the gripping section extension direction and the longitudinal extension direction of 0-45 degrees also falls within the situation described above.

[0045] Table 1 shows the machine parameters related to the handle and the center of gravity of vacuum pumps 1, 2, 3, 4, 5, and 6, wherein L represents the total length of the grip section, S1 represents the length of the vacuum pump body, S2 represents the length of the vacuum pump, x1 represents the distance from the first center of gravity g1 to the center point c of the grip section, and x2 represents the distance from the first center of gravity g2 to the center point c of the grip section:

[0046] Vacuum pump 1 Vacuum Pump 2 Vacuum pump 3 Vacuum pump 4 Vacuum pump 5 Vacuum pump 6 L / mm 108.80 110.00 90.00 116.30 91.00 122.20 S1 / mm 225.00 277.00 225.00 225.00 277.00 277.00 S2 / mm 290.00 342.00 290.00 290.00 342.00 342.00 X1 / mm 12.40 17.70 21.80 8.65 27.20 11.60 X2 / mm 1.40 5.30 10.80 2.35 14.80 0.80 x1 / L 0.11 0.16 0.24 0.07 0.30 0.09 x2 / L 0.01 0.05 0.12 0.02 0.16 0.01 L / S1 0.48 0.40 0.40 0.52 0.33 0.44 L / S2 0.38 0.32 0.31 0.40 0.27 0.36

[0047] Table 1

[0048] In some embodiments, reference Figure 5 , Figure 6, the vacuum pump body 110 has a first center of gravity g1, and the vacuum pump 100 has a second center of gravity g2; in the longitudinal extension direction of the vacuum pump 100, the ratios x1 / L and x2 / L of the distances x1 and x2 between the first center of gravity g1 and the second center of gravity g2 and the center point c of the gripping section 114a to the total length L of the gripping section are less than or equal to 0.3, preferably 0.24 and 0.3, such as the corresponding designs of vacuum pumps 3 and 5 in the above table. The value can be further selected to be less than or equal to 0.16, preferably 0.16, 0.11, 0.09, and 0.07, such as the corresponding designs of vacuum pumps 2, vacuum pumps 1, vacuum pumps 6, and vacuum pumps 4 in the above table.

[0049] Since the distance between the center of gravity of the vacuum pump and the center of the user's palm in the longitudinal extension direction of the vacuum pump is shorter, the torque formed by the deviation between the center of gravity and the center position of the user's palm can be reduced, thereby avoiding the situation where the user needs to use force to overcome the rotation tendency of the vacuum pump and avoiding uncomfortable grip for the user. When the user needs to hold the handle of the vacuum pump and lift the machine, since there needs to be enough area to fine-tune the position of the palm, the user is usually accustomed to holding the handle in the center area, that is, the area close to the center point of the grip section. By setting the ratios of x1 / L and x2 / L in this way, regardless of whether the vacuum pump is installed with a battery pack or removed from the battery pack, the center point of the grip section of the vacuum pump is close to the first center of gravity and the second center of gravity, so that when the user holds the area close to the center point of the grip section, the distance between the center of gravity of the vacuum pump and the center of the user's palm in the longitudinal extension direction of the vacuum pump can be shorter, achieving comfortable grip.

[0050] At the same time, the smaller ratios of x1 / L and x2 / L can also make the distance between the end of the gripping section and the center of gravity in the longitudinal extension direction of the vacuum pump larger, so that the user can have enough space to adjust the position of the palm, so that no matter whether the vacuum pump is installing the battery pack or removing the battery pack, the center of the user's palm can be adjusted to be in the same straight line with the center of gravity in the up and down direction, so that the center of gravity and the center position of the user's palm have basically no deviation in the longitudinal extension direction of the vacuum pump, and the user does not need to overcome the rotation tendency of the vacuum pump and exert force to achieve a comfortable grip.

[0051] As shown in Table 1 for vacuum pumps 1-6, in some embodiments, in the longitudinal extension direction of the vacuum pump, the total length L of the holding section is greater than or equal to 90 mm and less than or equal to 122.2 mm, and preferably 90 mm, 91 mm, 108.8 mm, 110 mm, 116.3 mm and 122.2 mm can be selected, as shown in the corresponding designs of vacuum pumps 3, 5, 1, 2, 4 and 6 in the above table.

[0052] For example, vacuum pumps 1-6 in Table 1, in some embodiments, in the longitudinal extension direction of the vacuum pump, the ratio L / S1 of the total length L of the gripping section to the length S1 of the vacuum pump body is less than or equal to 0.52, greater than or equal to 0.33, preferably 0.33, 0.4, 0.44, 0.48, 0.52 can be selected, such as the corresponding designs of vacuum pumps 5, vacuum pumps 2 and 3, vacuum pumps 6, vacuum pumps 1, and vacuum pumps 4 in the above table. In the longitudinal extension direction of the vacuum pump, the ratio L / S2 of the total length L of the gripping section to the length S2 of the vacuum pump is less than or equal to 0.4, greater than or equal to 0.27, preferably 0.27, 0.31, 0.32, 0.36, 0.38, 0.4 can be selected, such as the corresponding designs of vacuum pumps 5, vacuum pumps 3, vacuum pumps 2, vacuum pumps 6, vacuum pumps 1, and vacuum pumps 4 in the above table. The appropriate ratio of the total length L of the gripping section to the length of the vacuum pump and the vacuum pump body can make the machine more compact. Because too large a length ratio makes the grip section affect the design of other parts of the vacuum pump (such as the exhaust design of the oil mist collector), and too small a length ratio makes the grip section insufficient to provide sufficient gripping space.

[0053] Continue to refer Figure 1 , Figure 2 In some embodiments, the handle 114 further includes a connecting section 114b connected to the housing, and the grip section 114a includes a first end 114a1 and a second end 114a2 that are arranged opposite to each other, the first end 114a1 is connected to the connecting section 114b, and the second end 114a2 is a cantilever end. The handle 114 is designed in a cantilevered manner at one end, so that the manufacturing cost of the handle is lower.

[0054] like Figure 7 As shown, another embodiment of the present application provides a vacuum pump body 210, and the vacuum pump body 210 is different from the vacuum pump 100 only in the handle 214. The same components are denoted by the same reference numerals in the following description. The handle 214 also includes a first connecting section 214b1 and a second connecting section 214b2 connected to the housing, and the grip section 214a includes a first end 214a1 away from the pump assembly 113 and a second end 214a2 close to the pump assembly, the first connecting section 214b1 connects the first end 214a1, and the second connecting section 214b2 connects the second end 214a2. The design of the two connecting sections 214b1 and 214b2 can increase the strength of the handle 214, thereby greatly reducing the risk of the handle 214 being broken. The second connecting section 214b2 extends to the lower right side along a direction that forms a certain angle with the height direction of the vacuum pump body 210, and is connected to the housing 211.

[0055] like Figure 8As shown, another embodiment of the present application provides a vacuum pump body 310, which is different from the vacuum pump body 210 only in the second connecting section 214b2 of the handle and the outer shell 311. The same components are labeled with the same numbers in the following description. The outer shell 311 further wraps the pump assembly 113 to the left. The second connecting section 314b2 close to the pump assembly 113 extends along the height direction of the vacuum pump body 310. Because the gripping section 314a of the vacuum pump body 310 extends along the longitudinal extension direction of the vacuum pump body 310, the extension of the second connecting section 314b2 along the height direction of the vacuum pump body 310 will not hinder the user from using the gripping section 314a, and the structure is more reasonable and beautiful.

[0056] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A vacuum pump (100), comprising: A vacuum pump body (110, 210, 310) and a battery pack (120); Wherein, the vacuum pump body (110, 210, 310) comprises: a housing (111, 211, 311), the battery pack (120) being detachably connected to the housing (111, 211, 311); A motor assembly (112), the motor assembly (112) being accommodated in the housing (111, 211, 311); A pump assembly (113), driven by the motor assembly (112), for generating a pressure difference to discharge the gas in the target space; A handle (114, 214, 314) connected to the housing (111, 211, 311), the handle (114, 214, 314) having a gripping section (114a, 214a, 314a) for gripping; The battery pack (120) and the pump assembly (113) are respectively located on opposite sides of the motor assembly (112) along the longitudinal extension direction of the vacuum pump (100); The invention is characterized in that the handle (114, 214, 314) is integrally formed with the housing (111, 211, 311), and when the vacuum pump (100) is placed horizontally on a horizontal plane, the projections of the gripping section (114a, 214a, 314a) and the pump assembly (113) on the horizontal plane (H) at least partially overlap.

2. The vacuum pump (100) according to claim 1, characterized in that: The vacuum pump body (110, 210, 310) further includes a pump housing (115), The pump body housing (115) accommodates the pump assembly (113), and the pump body housing (115) and the housing (111, 211, 311) are made of different materials.

3. The vacuum pump (100) according to claim 2, characterized in that: The material strength of the pump body shell (115) is greater than the material strength of the shell (111, 211, 311).

4. The vacuum pump (100) according to claim 1, characterized in that: The gripping section (114a, 214a, 314a) is extended along the longitudinal extension direction of the vacuum pump (100).

5. The vacuum pump (100) according to claim 4, characterized in that: The vacuum pump body (110, 210, 310) has a first center of gravity (g1), and the vacuum pump (100) has a second center of gravity (g2); In the longitudinal extension direction of the vacuum pump (100), the ratio (x1 / L, x2 / L) of the distance (x1, x2) between the first center of gravity (g1) and the second center of gravity (g2) and the center point (c) of the gripping section (114a, 214a, 314a) to the total length (L) of the gripping section is less than or equal to 0.

3.

6. The vacuum pump (100) according to claim 5, characterized in that: In the longitudinal extension direction of the vacuum pump (100), the ratio (x1 / L, x2 / L) of the distance (x1, x2) between the first center of gravity (g1) and the second center of gravity (g2) and the center point (c) of the gripping section to the total length (L) of the gripping section is less than or equal to 0.

16.

7. The vacuum pump (100) according to any one of claims 1 to 6, characterized in that: In the longitudinal extension direction of the vacuum pump (100), the total length (L) of the gripping section is greater than or equal to 90 mm and less than or equal to 122.2 mm.

8. The vacuum pump (100) according to any one of claims 1 to 6, characterized in that: In the longitudinal extension direction of the vacuum pump, the ratio L / S1 of the total length (L) of the gripping section to the length (S1) of the vacuum pump body is less than or equal to 0.52 and greater than or equal to 0.

33.

9. The vacuum pump (100) according to any one of claims 1 to 6, characterized in that: The handle (114) further comprises a connecting section (114b) connected to the housing (111); the gripping section (114a) comprises a first end (114a1) and a second end (114a2) arranged opposite to each other; the first end (114a1) is connected to the connecting section (114b); and the second end (114a2) is a cantilever end.

10. The vacuum pump (100) according to any one of claims 1 to 6, characterized in that: The handle (214, 314) also includes a first connecting section (214b1, 314b1) and a second connecting section (214b2, 314b2) connected to the housing (111), the grip section (214a, 314a) includes a first end (214a1, 314a1) away from the pump assembly (113) and a second end (214a2, 314a2) close to the pump assembly (113), the first connecting section (214b1, 314b1) is connected to the first end (214a1, 314a1), and the second connecting section (214b2, 314b2) is connected to the second end (214a2, 314a2).

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