Manual vacuum pump for vacuum chuck

Abstract

The utility model relates to a manual vacuum pump for a suction cup. The manual vacuum pump comprises a sleeve, a one-way valve, a piston rod and a guide rod, one end of the sleeve is an air inlet channel communicated with an inner cavity of the sleeve, the other end of the sleeve is an opening of the inner cavity of the sleeve, the piston rod penetrates into the inner cavity of the sleeve from the opening of the inner cavity of the sleeve, and the one-way valve is arranged at the joint of the air inlet channel and the inner cavity of the sleeve. One end of the guide rod is a pressing plate which abuts against the one-way valve, the outer wall of the guide rod is sleeved with a reset spring, one end of the reset spring abuts against the pressing plate, and the other end of the reset spring penetrates into an inner hole of the piston rod and abuts against the inner end face of the inner hole of the piston rod. According to the manual vacuum pump, the longitudinal size of the whole manual vacuum pump is reduced, meanwhile, the inner cavity of the sleeve serves as a vacuumizing cavity, the longitudinal size of the inner cavity of the sleeve is increased, miniaturization design is better facilitated, and the size of the whole suction cup is reduced.

Description

Technical Field

[0001] The present application relates to a suction cup accessory structure, and more specifically to a manual vacuum pump for a vacuum suction cup. Background Art

[0002] Tools that are often used in many scenarios will have a vacuum suction cup structure, including but not limited to suction cup handrails, suction cup brackets, suction cup clothes drying racks, etc. Some vacuum suction cups use a manual vacuum pump to perform vacuuming. Chinese patent ZL201420704405.9 discloses a handheld vacuum pump suction cup. As can be seen from its attached drawings, the cylinder on the left side of the piston rod of the vacuum pump assembly is convex, the middle cylinder is used to guide the axial movement of the cylinder on the left, and the inner cavity on the right is the vacuum chamber. The vacuum chamber only occupies about one-third of the longitudinal dimension of the vacuum pump assembly. The longitudinal dimension of the entire vacuum pump assembly is large, which is not conducive to miniaturization design and needs to be improved. Utility Model Content

[0003] The purpose of the present application is to overcome the above defects of the prior art and provide a manual vacuum pump for a suction cup to reduce the longitudinal size of the vacuum pump assembly.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a manual vacuum pump for a suction cup, which includes a sleeve, a one-way valve, a piston rod and a guide rod. One end of the sleeve is an air inlet connected to the inner cavity of the sleeve, and the other end is an opening of the inner cavity of the sleeve. The piston rod penetrates into the inner cavity of the sleeve from the opening of the inner cavity of the sleeve. The one-way valve is arranged at the connection between the air inlet and the inner cavity of the sleeve. The guide rod is arranged in the inner cavity of the sleeve and is coaxial with the piston rod. One end of the guide rod is a pressure plate, which abuts against the one-way valve. A reset spring is sleeved on the outer wall of the guide rod. One end of the reset spring abuts against the pressure plate, and the other end penetrates into the inner hole of the piston rod and abuts against the inner end surface of the inner hole of the piston rod.

[0005] Compared with the prior art, the present invention has the following beneficial effects: the piston rod directly penetrates into the inner cavity of the sleeve, the guide rod in the inner cavity of the sleeve can guide the piston rod, and the reset spring is arranged between the guide rod and the piston rod, so the longitudinal dimension of the entire manual vacuum pump is reduced, which is more conducive to miniaturization design and also conducive to reducing the size of the entire suction cup. At the same time, the inner cavity of the sleeve as a vacuum chamber has its longitudinal dimension increased, which is conducive to improving the vacuum efficiency.

[0006] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1This is a three-dimensional diagram of the assembly of the manual vacuum pump of this application.

[0008] Figure 2 A cross-sectional view of the manual vacuum pump of the present application.

[0009] Figure 3 Exploded view of the manual vacuum pump for this application.

[0010] It should be noted that the products shown in the above views have been appropriately reduced / enlarged to suit the size of the drawings and for clarity of the views, and there is no restriction on the size of the products shown in the views. DETAILED DESCRIPTION

[0011] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0012] 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0013] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0014] The embodiment of the present application is a manual vacuum pump for a suction cup, and its specific structure is as follows Figure 1-3 shown.

[0015] like Figure 1 As shown, the manual vacuum pump includes a sleeve 10 and a piston rod 20. One end of the piston rod 20 is inserted into the sleeve 10, and the piston rod 20 serves as a vacuum operation rod. The other end of the sleeve 10 is a straight cylinder 11, which can be connected to the suction surface of the suction cup to remove the air around the suction surface to form a vacuum.

[0016] Combination Figure 2 and Figure 3As shown, the manual vacuum pump further includes a one-way valve 30 and a guide rod 41. One end of the sleeve 10 is an air inlet 12 connected to the inner cavity 13 of the sleeve 10, and the other end is an opening 131 of the inner cavity 13 of the sleeve 10. The air inlet 12 is arranged inside the straight cylinder 11. The air inlet 12 is used to allow air to enter the inner cavity 13 of the sleeve 10, and the one-way valve 30 is placed at the connection between the air inlet 12 and the inner cavity 13 of the sleeve 10. The one-way valve 30 is used to allow air to enter the inner cavity 13 of the sleeve 10 from the air inlet 12 in one direction when vacuuming, and prevent air from flowing back into the air inlet 12 from the inner cavity 13 of the sleeve 10. In addition, the piston rod 20 penetrates into the inner cavity 13 of the sleeve 10 from the opening 131 of the inner cavity 13 of the sleeve 10, and the piston rod 20 can reciprocate in the inner cavity 13 of the sleeve 10. The guide rod 41 is placed in the inner cavity 13 of the sleeve 10 and is coaxial with the piston rod 20. One end of the guide rod 41 is a pressure plate 42, and the pressure plate 42 abuts against the one-way valve 30. The outer wall of the guide rod 41 is sleeved with a reset spring 50. The reset spring 50 is a coil spring. One end of the reset spring 50 abuts against the pressure plate 42, and the other end penetrates into the inner hole 21 of the piston rod 20 and abuts against the inner end surface 22 of the inner hole 21 of the piston rod 20. The guide rod 41 is used to fix one end of the reset spring 50 and to guide the piston rod 20 when the piston rod 20 moves axially. The manual vacuum pump of the embodiment saves the intermediate cylinder for guiding the piston rod 20, so the longitudinal size of the entire manual vacuum pump is reduced, which is more conducive to miniaturized design and also conducive to reducing the size of the entire suction cup. At the same time, the inner cavity 13 of the sleeve 10 serves as a vacuum chamber, and its longitudinal size is increased, which is conducive to improving the vacuum efficiency.

[0017] In some embodiments, Figure 2 As shown, the axial length of the inner hole 21 of the piston rod 20 is not less than the length of the guide rod 41, so the guide rod 41 will not block the piston rod 20 from entering the inner cavity 13 of the sleeve 10. Figure 2 As shown, when the piston rod 20 is in the initial position, the end of the guide rod 41 is just at the opening 24 of the inner hole 21 of the piston rod 20. When the piston rod 20 enters the inner cavity 13 of the sleeve 10 from the initial position, the guide rod 41 is inserted into the inner hole 21 of the piston rod 20.

[0018] In some embodiments, in combination Figure 2 and Figure 3 As shown, the side of the pressure plate 42 facing the one-way valve 30 is provided with an avoidance groove 421, which can prevent the air hole of the one-way valve 30 from being blocked. The pressure plate 42 is also provided with an air hole 422, and the avoidance groove 421 is connected to the inner cavity 13 of the sleeve 10 through the air hole 422. Figure 3 There are four air holes 422 evenly distributed around the central axis of the guide rod 41, and the air holes 422 are arc-shaped. When vacuuming, the air flowing into the air inlet 12 passes through the one-way valve 30, and then enters the inner cavity 13 of the sleeve 10 through the avoidance groove 421 and the air holes 422.

[0019] In some embodiments, in combination Figure 2 and Figure 3 As shown, a one-way sealing ring 70 is sandwiched between the piston rod 20 and the inner wall of the inner cavity 13 of the sleeve 10, and the one-way sealing ring 70 is fixed in the annular groove 25 of the outer wall of the piston rod 20. When the piston rod 20 enters the inner cavity 13 of the sleeve 10, due to the presence of the one-way valve 30, the air in the inner cavity 13 of the sleeve 10 can only be discharged through the one-way sealing ring 70 and the inner wall of the inner cavity 13; and under the action of the reset spring 50, during the stroke of the piston rod 20 gradually returning to its original position, a seal is formed between the one-way sealing ring 70 and the inner wall of the inner cavity 13, and the air is drawn into the inner cavity 13 of the sleeve 10 through the air inlet 12, the one-way valve 30, the avoidance groove 421, and the air vent 422.

[0020] In some embodiments, in combination Figure 2 and Figure 3 As shown, an end cap 60 is clamped at one end of the sleeve 10 corresponding to the opening 131 of the inner cavity 13, and the piston rod 20 passes through the hole 61 in the end cap 60. A limiting convex ring 23 is provided on the outer wall of the piston rod 20, and the outer diameter of the limiting convex ring 23 is larger than the inner diameter of the hole 61 in the end cap 60, that is, the limiting convex ring 23 cannot pass through the hole 61 in the end cap 60. When the piston rod 20 is in the initial position, the restoring force of the return spring 50 makes the limiting convex ring 23 press against the inner wall of the end cap 60, and the piston rod 20 will not be separated from the sleeve 10.

[0021] In some embodiments, Figure 3 As shown, the end cap 60 is provided with two buckle heads 62, which are arranged opposite to each other. The outer wall of the sleeve 10 is provided with a clamping groove 14 corresponding to the buckle heads 62, and the end cap 60 and the sleeve 10 are clamped together by the cooperation between the buckle heads 62 and the clamping groove 14.

[0022] In some embodiments, Figure 3 As shown, the outer edge of the end surface of the sleeve 10 corresponding to the opening 131 of the inner cavity 13 is provided with an arc-shaped positioning groove 15. In the central axis direction of the sleeve 10, the arc-shaped positioning groove 15 corresponds to the clamping groove 14 one by one, and the circumferential width of the arc-shaped positioning groove 15 is equal to the circumferential width of the clamping groove 14. When installing the end cover 60, the end cover 60 is covered on one end of the sleeve 10, and the end cover 60 is rotated so that the buckle head 62 corresponds to the arc-shaped positioning groove 15, and then the end cover 60 is axially pressed so that the buckle head 62 forms a clamping connection with the clamping groove 14, and the end cover 60 is fixed on the sleeve 10. When installing the end cover 60, the arc-shaped positioning groove 15 plays a role of pre-positioning.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] In the specification and claims of the present application, the words "include / comprise" and the words "have / have" and their variations are used to specify the existence of stated features, values, steps or components, but do not exclude the existence or addition of one or more other features, values, steps, components or combinations thereof.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0027] The above examples are only used to further illustrate the technical content of this application so that readers can understand it more easily, but they do not mean that the implementation methods of this application are limited to these. Any technical extension or re-creation made based on this application is protected by this application. The scope of protection of this application shall be subject to the claims.

Claims

1. A manual vacuum pump for a suction cup, characterized in that: It includes a sleeve, a one-way valve, a piston rod and a guide rod. One end of the sleeve is an air inlet connected to the inner cavity of the sleeve, and the other end is an opening of the inner cavity of the sleeve. The piston rod penetrates into the inner cavity of the sleeve from the opening of the inner cavity of the sleeve. The one-way valve is placed at the connection between the air inlet and the inner cavity of the sleeve. The guide rod is placed in the inner cavity of the sleeve and is coaxial with the piston rod. One end of the guide rod is a pressure plate, which abuts against the one-way valve. A reset spring is sleeved on the outer wall of the guide rod. One end of the reset spring abuts against the pressure plate, and the other end penetrates into the inner hole of the piston rod and abuts against the inner end surface of the inner hole of the piston rod.

2. The manual vacuum pump for a suction cup according to claim 1, characterized in that: The axial length of the inner hole of the piston rod is not less than the length of the guide rod.

3. The manual vacuum pump for a suction cup according to claim 1, characterized in that: A side of the pressure plate facing the one-way valve is provided with an avoidance groove, and the pressure plate is also provided with an air vent, and the avoidance groove is connected to the inner cavity of the sleeve through the air vent.

4. The manual vacuum pump for the suction cup according to claim 3, characterized in that: The number of the vent holes is no less than one and the vent holes are evenly distributed around the central axis of the guide rod.

5. The manual vacuum pump for a suction cup according to claim 1, characterized in that: A one-way sealing ring is sandwiched between the piston rod and the inner wall of the inner cavity of the sleeve, and the one-way sealing ring is fixed in an annular groove on the outer wall of the piston rod.

6. The manual vacuum pump for a suction cup according to claim 1, characterized in that: An end cap is clamped on one end of the sleeve corresponding to the inner cavity opening, the piston rod passes through the hole in the end cap, and a limiting convex ring is provided on the outer wall of the piston rod, and the outer diameter of the limiting convex ring is larger than the inner diameter of the hole in the end cap.

7. The manual vacuum pump for a suction cup according to claim 6, characterized in that: The end cover is provided with at least one buckle head, the outer wall of the sleeve is provided with a slot corresponding to the buckle head, and the end cover and the sleeve are connected by the cooperation of the buckle head and the slot.

8. The manual vacuum pump for a suction cup according to claim 7, characterized in that: An arc-shaped positioning groove is provided on the outer edge of the end surface of the sleeve corresponding to the inner cavity opening. In the central axis direction of the sleeve, the arc-shaped positioning groove corresponds to the clamping groove one by one, and the circumferential width of the arc-shaped positioning groove is equal to the circumferential width of the clamping groove.

9. A manual vacuum pump for a suction cup as claimed in any one of claims 1 to 8, characterized in that: The return spring is a coil spring.

Images