A hand pump

Abstract

This invention relates to a hand pump, which includes a pump body, a piston rod installed within the pump body, and an operating lever assembly driven by and for driving the piston rod. The operating lever assembly includes an operating rod, a connecting plate connecting the operating rod and the pump body, and a driving connecting plate connecting the operating rod and the piston rod. The connection between the connecting plate and the operating rod and / or the connecting plate and the pump body is hinged, as is the connection between the driving connecting plate and the operating rod and / or the driving connecting plate and the piston rod. Both the connection between the connecting plate and the pump body and the connection between the driving connecting plate and the piston rod are detachable. The hand pump also includes a limiting member for detachably connecting to the pump body after the driving connecting plate is removed from the piston rod to restrict the movement of the piston rod. This invention effectively solves the problem in the prior art where the operating lever assembly connected to the pump body results in a large space occupation and inconvenient transportation of the hand pump.

Description

Technical Field

[0001] This invention relates to a hand pump, belonging to the field of hand pump technology. Background Technology

[0002] A hand pump, also called a manual pump, is a type of pump that uses manual force. For example, a hand pump for a high-torque pneumatic-hydraulic linkage actuator disclosed in Chinese Utility Model Patent No. CN204493098U includes a pump body, a piston chamber disposed within the pump body, and a piston rod installed within the piston chamber. It also includes a pressure rod (i.e., an operating rod), a first connecting plate (i.e., a connecting plate), and a second connecting plate (i.e., a driving plate). One end of the first connecting plate is hinged to the pressure rod, and the other end is fixedly connected to the pump body. One end of the second connecting plate is hinged to the pressure rod, and the other end is hinged to the end of the piston rod. When the pressure rod rotates around the hinge axis between itself and the first connecting plate, the piston rod can be driven to move within the piston chamber via the second connecting plate. The pressure rod, the first connecting plate, and the second connecting plate constitute the operating rod assembly for driving the piston rod. To prevent accidental actuation of the piston rod via the pressure rod when the hand pump is not in use, a locking rod is hinged between the pressure rod and the pump body to lock the pressure rod and prevent accidental actuation of the piston rod.

[0003] In the aforementioned patent document, although the locking rod can prevent accidental driving of the piston rod by locking the pressure rod when the hand pump is not in operation, the operating rod assembly connected to the pump body not only causes the hand pump to occupy a large space, but also makes it easy to interfere with other objects, making it inconvenient to transport the hand pump. Summary of the Invention

[0004] The purpose of this invention is to provide a hand pump to solve the problem that the operating lever assembly connected to the pump body in the prior art causes the hand pump to occupy a large space and be inconvenient to transport.

[0005] To achieve the above objectives, the hand pump in this invention adopts the following technical solution:

[0006] A hand pump includes a pump body, a piston rod installed in the pump body, and an operating lever assembly that is throttledly connected to the piston rod and used to drive the piston rod to move. The operating lever assembly includes an operating rod, a connecting plate connected between the operating rod and the pump body, and a driving connecting plate connected between the operating rod and the piston rod. The connection between the connecting plate and the operating rod and / or the connecting plate and the pump body is hinged, and the connection between the driving connecting plate and the operating rod and / or the driving connecting plate and the piston rod is hinged. The connection between the connecting plate and the pump body and the connection between the driving connecting plate and the piston rod are detachable. The hand pump also includes a limiting member for detachably connecting to the pump body after the driving connecting plate is disassembled from the piston rod to limit the movement of the piston rod.

[0007] The beneficial effects of the above technical solution are as follows: This invention provides an improved hand pump compared to the prior art. In this hand pump, the connection between the connecting plate and the pump body, as well as the connection between the drive connecting plate and the piston rod, are detachable. Furthermore, the hand pump also includes a limiting member that can be detachably connected to the pump body after the drive connecting plate and the piston rod are disassembled to restrict the movement of the piston rod. Therefore, compared to the prior art, after the hand pump is used, the operating rod assembly can be removed from the pump body by disassembling the connection between the drive connecting plate and the piston rod, and the connection between the connecting plate and the pump body. During transportation, since the operating rod assembly is not connected to the pump body, the space occupied by the hand pump can be reduced, and interference between the hand pump and other objects can also be reduced, which is beneficial for the convenient transportation of the hand pump. In addition, the movement of the piston rod can be restricted by the limiting member to ensure the stable installation of the piston rod on the pump body.

[0008] Furthermore, one end of the drive plate is hinged to the operating lever, and the other end is connected to the piston rod via threaded fasteners.

[0009] The beneficial effects of the above technical solution are that the threaded fasteners not only ensure the connection between the piston rod and the drive connecting plate, but also facilitate the detachable connection between the drive connecting plate and the piston rod.

[0010] Furthermore, the hinge between the drive plate and the operating lever is a detachable hinge, and the operating lever is provided with a mounting structure for threaded engagement with threaded fasteners, so that the drive plate can be installed on the operating lever by threaded fasteners after the drive plate is disassembled.

[0011] The beneficial effects of the above technical solution are as follows: the installation structure allows for easy storage of the drive plate after disassembly between the drive plate and the operating lever, preventing the drive plate from being lost. In addition, the original structure of the drive plate can be utilized to install the drive plate on the operating lever using threaded fasteners, further facilitating the installation of the drive plate on the operating lever.

[0012] Furthermore, the mounting structure is disposed on the end face of the operating lever.

[0013] The advantages of the above technical solution are that it not only facilitates the installation of the mounting structure on the operating lever, but also facilitates the installation of the drive connecting plate on the operating lever, thereby reducing the space occupied by the drive connecting plate on the operating lever.

[0014] Furthermore, the drive connecting plate and the operating lever, as well as the drive connecting plate and the piston rod, are detachably connected. The operating lever is provided with a connection structure for detachably connecting the drive connecting plate to the operating lever after the drive connecting plate is disassembled.

[0015] The beneficial effect of the above technical solution is that, through the connection structure, the drive connecting plate can be easily fixed after disassembly, thus preventing the drive connecting plate from being lost.

[0016] Furthermore, the drive connecting plate is L-shaped and includes a first side plate for hinged to the operating lever and a second side plate for connection with the piston rod via threaded fasteners.

[0017] The beneficial effects of the above technical solution are as follows: by using the L-shaped drive connecting plate, the structure of the drive connecting plate is optimized, which not only facilitates the hinge between the drive connecting plate and the operating rod, but also facilitates the connection between the drive connecting plate and the piston rod through the threaded fastener.

[0018] Furthermore, the drive connecting plate and the operating lever are hinged by a detachable pin. One end of the connecting plate is hinged to the operating lever, and the other end is hinged to the pump body by a detachable pin. This allows the connecting plate to be installed on the operating lever via the pin after disassembly between the connecting plate and the pump body, and between the drive connecting plate and the operating lever.

[0019] The beneficial effects of the above technical solution are as follows: by installing the connecting plate on the operating rod, the shaking of the connecting plate after disassembly from the pump body can be avoided, making the structure of the disassembled operating rod assembly more compact and convenient for transportation and storage.

[0020] Furthermore, the operating lever is provided with a mounting plane that extends along the axial direction of the operating lever, and the connecting plate and the drive plate are hinged to the mounting plane.

[0021] The beneficial effects of the above technical solution are: by using the mounting plane, the connecting plate can be installed more stably on the operating lever, and at the same time, the structure of the disassembled operating lever assembly is made more compact.

[0022] Furthermore, the limiting member is a cover plate that seals with the pump body and is used to cover the piston rod.

[0023] The beneficial effects of the above technical solution are as follows: the cover plate can not only limit the piston rod and ensure its stable installation in the pump body, but also ensure the sealing of the pump body and ensure the normal use of the hand pump.

[0024] Furthermore, the control lever includes a handle and a connecting base detachably connected to the handle, and both the drive plate and the connecting plate are connected to the connecting base.

[0025] The beneficial effect of the above technical solution is that, since the handle is usually long, disassembling the handle and the connecting seat makes it convenient to transport and store the operating lever. Attached Figure Description

[0026] Figure 1This is a partial cross-sectional view of the hand pump in Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the disassembled and reassembled operating lever assembly in Embodiment 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of the cover plate being assembled on the pump body in Embodiment 1 of the present invention.

[0029] In the figure: 10, pump body; 11, piston chamber; 20, piston rod; 21, first internal threaded hole; 30, operating rod; 31, handle; 32, connecting seat; 33, second internal threaded hole; 34, mounting plane; 40, drive connecting plate; 50, connecting plate; 60, pin; 70, cover plate; 80, annular seal. Detailed Implementation

[0030] Example 1 of the hand pump in this invention:

[0031] This invention provides an improved hand pump compared to existing technology. After the hand pump is finished using, the operating lever assembly can be removed from the pump body by disconnecting the connection between the drive connecting plate and the piston rod, as well as the connection between the connecting plate and the pump body. This reduces the space occupied by the hand pump during transportation, as there is no operating lever assembly connected to the pump body, and also reduces interference between the hand pump and other objects, thus facilitating the transportation of the hand pump.

[0032] Specifically, such as Figure 1 As shown, the hand pump includes a pump body 10, a piston chamber 11 disposed within the pump body 10, a piston rod 20 installed within the piston chamber 11, and an operating lever assembly that is pulsatorically connected to the piston rod 20 and used to drive the piston rod 20. The operating lever assembly includes an operating lever 30, a connecting plate 50, and a drive plate 40. The operating lever 30 includes a handle 31 and a connecting seat 32 detachably connected to the handle 31. Specifically, in this embodiment, the handle 31 and the connecting seat 32 are threadedly connected. Figure 2 As shown, the connecting seat 32 is provided with a mounting plane 34 extending axially along the operating rod 30. One end of the connecting plate 50 is hinged to the mounting plane 34 by a pin 60, and the other end is hinged to the pump body 10 by a pin 60. The drive plate 40 is L-shaped and includes a first side plate hinged to the mounting plane 34 by a pin 60 and a second side plate connected to the end of the piston rod 20 by a threaded fastener. In this embodiment, the threaded fastener is a screw. The end face of the piston rod 20 is provided with a first internal thread hole 21 that engages with the screw, and the second side plate is provided with a screw through hole for the screw to pass through. The axis of the screw is parallel to the axis of the piston rod 20.

[0033] like Figure 1 As shown, the connecting plate 50 and the pump body 10 are hinged together by a detachable pin 60. The connecting plate 50 has a first pin through hole for the pin 60 to pass through. The drive connecting plate 40 and the connecting seat 32 are also hinged together by a detachable pin 60. The connecting seat 32 has a second pin through hole for the pin 60 to pass through. After the hand pump is used, to avoid accidental operation, the operating lever assembly can be completely removed from the hand pump, and as shown... Figure 2 As shown, after the connecting plate 50 is disassembled from the pump body 10, it can be installed on the connecting seat 32 by means of the pin 60 that passes through the first pin hole and the second pin hole.

[0034] like Figure 2 As shown, the end face of the handle 31 away from the connecting seat 32 is provided with a mounting structure for threaded engagement with threaded fasteners. In this embodiment, the mounting structure is a second internal threaded hole 33 that engages with screws. Thus, after the drive plate 40 is removed from the connecting seat 32 and the operating rod 30, the drive plate 40 can be fixed to the end of the handle 31 by screws.

[0035] Additionally, the hand pump also includes a limiting member for detachably connecting to the pump body 10 after being removed from the drive connecting plate 40 and the operating lever 30 to limit the movement of the piston rod 20. In this embodiment, such as... Figure 3 As shown, the limiting component is a cover plate 70 that seals with the pump body 10 and covers the piston rod 20. Specifically, the cover plate 70 is installed at the opening of the piston chamber 11 by screws, and the cover plate 70 and the pump body 10 are sealed together by an annular seal 80. The cover plate 70 is provided with an annular groove for installing the annular seal 80. The cover plate 70 not only limits the piston rod 20 but also ensures the sealing of the piston chamber 11, ensuring the normal operation of the hand pump.

[0036] Embodiment 2 of the hand pump in this invention:

[0037] This embodiment provides an operating lever that differs from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the operating lever is integrally formed.

[0038] Example 3 of the hand pump in this invention:

[0039] This embodiment provides a limiting member that differs from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that, in this embodiment, the limiting member is a stop rod connected to the pump body and engaging with the end of the piston rod for stopping and limiting.

[0040] Example 4 of the hand pump in this invention:

[0041] This embodiment provides a drive connecting plate different from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the drive connecting plate is flat, and the end of the piston rod is provided with a boss for connecting with the drive connecting plate by screws. The side of the boss is provided with an internal threaded hole for threaded engagement with the screw, and the screw axis is perpendicular to the axis of the piston rod.

[0042] Example 5 of the hand pump in this invention:

[0043] This embodiment provides an operating lever that differs from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that, in this embodiment, the operating lever does not have a mounting surface, and the entire operating lever is cylindrical.

[0044] Example 6 of the hand pump in this invention:

[0045] This embodiment provides an installation method for the operating lever that differs from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that, in this embodiment, after the connecting plate is separated from the pump body, it is not installed on the operating lever, but one end is only hinged to the operating lever.

[0046] Example 7 of the hand pump in this invention:

[0047] This embodiment provides an installation structure different from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that, in this embodiment, the installation structure is a threaded rod set on the end face of the operating rod. The drive connecting plate makes the threaded rod pass through the screw hole on it and connect with the nut threadedly to achieve the fixed installation of the drive connecting plate on the operating rod. At this time, the threaded fastener is the nut.

[0048] Example 8 of the hand pump in this invention:

[0049] This embodiment provides a different mounting structure location than that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the mounting structure is set on the circumferential surface of the operating lever.

[0050] Example 9 of the hand pump in this invention:

[0051] This embodiment provides a detachable relationship between the drive connecting plate and the operating lever, which differs from that in Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the drive connecting plate and the operating lever are not detachable.

[0052] Example 10 of the hand pump in this invention:

[0053] This embodiment provides a threaded fastener for the connection between the drive connecting plate and the piston rod that differs from that in Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the end of the piston rod is provided with a threaded rod, and the drive connecting plate is provided with a through hole for the threaded rod to pass through. After the threaded rod passes through the through hole and is fixed with a nut, the connection between the drive connecting plate and the piston rod can be realized. In this case, the threaded fastener is a nut.

[0054] Example 11 of the hand pump in this invention:

[0055] This embodiment provides a connection relationship between the drive connecting plate and the operating rod, and between the drive connecting plate and the piston rod, that differs from Embodiment 1. The difference lies in the fact that in this embodiment, the drive connecting plate and the piston rod are detachably hinged. In other embodiments, the drive connecting plate and the piston rod bracket are detachably hinged, while the drive connecting plate and the operating rod are fixedly connected.

[0056] Example 12 of the hand pump in this invention:

[0057] This embodiment provides a connection relationship between the connecting plate and the operating rod, and between the connecting plate and the pump body, that differs from Embodiment 1. The difference lies in the fact that in this embodiment, the connecting plate and the pump body are connected but not hinged. In other embodiments, the connecting plate and the operating rod are fixedly connected.

[0058] Example 13 of the hand pump in this invention:

[0059] This embodiment provides a connection for the drive connecting plate that differs from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the drive connecting plate and the piston rod are hinged by a detachable pin. The operating rod is provided with a connection structure for detachably connecting the drive connecting plate to the operating rod after the drive connecting plate is disassembled. In this embodiment, the connection structure is a socket for inserting a pin.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A hand force pump comprising a pump body (10), a piston rod (20) mounted in the pump body (10), and an operating lever assembly in driving connection with the piston rod (20) and for driving the piston rod (20) into action, the operating lever assembly comprising an operating lever (30), a connecting web (50) connected between the operating lever (30) and the pump body (10), and a driving web (40) connected between the operating lever (30) and the piston rod (20), characterized in that the driving web (40) is connected to the operating lever (30) by means of a hinge (41) and to the piston rod (20) by means of a hinge (42). The operating lever is provided with a mounting plane extending along the axial direction of the operating lever, one end of the connecting link is hingedly connected to the mounting plane through a pin shaft, and the other end is detachably hingedly connected to the pump body through a detachable pin shaft, and the connecting link is provided with a first pin shaft through hole through which the detachable pin shaft hingedly connected to the pump body passes; one end of the driving link is detachably hingedly connected to the mounting plane through a detachable pin shaft, and the other end is detachably connected to the piston rod, and the operating lever is provided with a second pin shaft through hole through which the detachable pin shaft hingedly connected to the driving link passes, so that after the connecting link and the pump body and the driving link and the operating lever are detached, the connecting link is mounted on the operating lever through the pin shaft passing through the first pin shaft through hole and the second pin shaft through hole, and the hand pump further comprises a limiting piece for being detachably connected to the pump body (10) after the driving link (40) and the piston rod (20) are detached to limit the action of the piston rod (20).

2. The hand pump of claim 1, wherein, The other end of the driving link (40) is connected to the piston rod (20) through a threaded fastener.

3. The hand pump of claim 2, wherein, The operating lever (30) is provided with a mounting structure for threadedly cooperating with the threaded fastener, so that after the driving link (40) is detached, the driving link (40) is mounted on the operating lever (30) through the threaded fastener.

4. The hand pump of claim 3, wherein, The mounting structure is arranged on the end face of the end portion of the operating lever (30).

5. The hand pump of claim 1, wherein, The operating lever (30) is provided with a connecting structure for detachably connecting the driving link (40) to the operating lever (30) after the driving link (40) is detached.

6. The hand pump according to any one of claims 2 to 4, wherein The driving link (40) is L-shaped, and the driving link (40) comprises a first side plate for being hingedly connected to the operating lever (30) and a second side plate for being connected to the piston rod (20) through the threaded fastener.

7. The hand pump according to any one of claims 1 to 5, wherein The limiting piece is a cover plate mounted at the cavity opening of the piston cavity through a screw and sealingly matched with the pump body to cover the piston rod.

8. The hand pump of claim 7, wherein, The cover plate and the pump body are sealingly matched through an annular sealing member, and the cover plate is provided with an annular groove for mounting the annular sealing member.

9. The hand pump of any one of claims 2-4, wherein, The driving link is L-shaped, and the driving link comprises a first side plate hingedly connected to the mounting plane through a pin shaft and a second side plate connected to the end portion of the piston rod through a threaded fastener, the threaded fastener is a screw, the end face of the end portion of the piston rod is provided with a first internal thread hole threadedly matched with the screw, and the second side plate is provided with a screw through hole through which the screw passes.

10. The hand pump according to any one of claims 1 to 5, wherein The operating lever (30) comprises a handle (31) and a connecting seat (32) detachably connected to the handle (31), and the driving link (40) and the connecting link (50) are connected to the connecting seat (32).

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