Hand pump capable of preventing mistaken starting

Abstract

The hand pump comprises a pump body and a rocker arm, an operation bin is arranged on the outer side wall of the pump body, a first transmission shaft is arranged in the operation bin, one end of the first transmission shaft penetrates into the pump body, a second transmission shaft is arranged on the operation bin in a sliding mode, one end of the second transmission shaft is arranged outside the operation bin, and the other end of the second transmission shaft penetrates into the operation bin. A first transmission groove is formed in the end, close to the second transmission shaft, of the first transmission shaft, a transmission key corresponding to the first transmission groove is fixedly arranged on the end, close to the first transmission shaft, of the second transmission shaft, a separation mechanism used for enabling the transmission key to retreat from the first transmission groove is arranged in the operation bin, and the rocker arm is detachably connected with the pump body. The rocker arm is provided with a second transmission groove corresponding to the second rotating shaft, the rocker arm is provided with a synchronous rotating mechanism used for enabling the transmission key to enter the first transmission groove, and by means of the structure, when the rocker arm is detached from the pump body, rotation of the second rotating shaft cannot enable the first rotating shaft to rotate, and therefore the problem that the pump body is locked by mistake cannot occur.

Description

TECHNICAL FIELD

[0001] The utility model relates to hand pump technical field, especially a hand pump can prevent false start. BACKGROUND

[0002] Hand pump is a kind of tool to transport liquid with hand shaking power. It is suitable for pumping clean water, gasoline, kerosene and liquid without corrosiveness to iron and copper.

[0003] At present, most hand pumps only need to rotate the rocker arm to work, which is relatively convenient to use, but due to the lack of locking mechanism of the rocker arm, false start may occur. For example, water pump, many application scenarios of hand pump are outdoor, when the hand pump is in a stationary state, the rocker arm may rotate due to external force or accidental touch, when some children play outdoors, they often shake the hand pump, which is not conducive to water conservation, and false start of the hand pump may also cause safety hazards to the operator, especially when handling toxic, corrosive or high-temperature liquid, accidental start may cause liquid to splash or equipment out of control, increasing the risk of accidents. SUMMARY

[0004] The utility model provides a hand pump can prevent false start, solve the above-mentioned problems existing in the use process in the prior art.

[0005] The technical scheme of the utility model is realized as follows: a hand pump can prevent false start, comprising a pump body and a rocker arm, a operation bin is fixedly arranged on the outer side wall of the pump body, a first transmission shaft is arranged in the operation bin, the first transmission shaft is rotatably arranged on the pump body, one end of the first transmission shaft penetrates into the inside of the pump body, a second transmission shaft is slidably arranged on the operation bin, one end of the second transmission shaft is arranged outside the operation bin and the other end penetrates into the operation bin and points to the first transmission shaft, a first transmission groove is arranged on the end of the first transmission shaft close to the second transmission shaft, a transmission key is fixedly arranged on the end of the second transmission shaft close to the first transmission shaft and corresponds to the first transmission groove, a separation mechanism for making the transmission key exit the first transmission groove is arranged in the operation bin, the rocker arm is detachably connected with the pump body, a second transmission groove is arranged in the rocker arm and corresponds to the second transmission shaft, and a synchronous rotation mechanism for making the transmission key enter the first transmission groove is arranged on the rocker arm.

[0006] The utility model is further provided as follows: the operation bin comprises an outer cylinder and an inner cylinder, the outer cylinder is fixedly connected on the pump body, the inner cylinder is slidably arranged on the inner side wall of the inner cylinder, a shutter is arranged on the end of the inner cylinder away from the pump body, the middle part of the second transmission shaft is rotatably connected on the shutter, and the separation mechanism comprises an elastic abutting member arranged between the outer side wall of the pump body and the shutter.

[0007] The utility model further sets up: the synchronous rotation mechanism includes the holding part, the holding part sets up on the swing arm, the holding part with the installation of swing arm pushes the shutter to the pump body direction.

[0008] The utility model further sets up: the holding part includes the connecting cover and the holding ring, the connecting cover is used for and the outer tube carries out detachable connection, the swing arm includes the connecting block for and the second transmission shaft is connected, one end of connecting cover is provided with the mounting plate, the mounting plate is set on the outside wall of connecting block and is connected with connecting block, the holding ring is fixedly arranged on the mounting plate and extends to the other end of connecting cover, the holding ring is set on the outside of connecting block, the end part of the holding ring away from the mounting plate is used for and the end part of the shutter away from the pump body is held.

[0009] The utility model further sets up: the inner side wall of connecting cover passes through the thread cooperation and is detachable connected with the outside wall of outer tube.

[0010] The utility model further sets up: the connecting block rotation is arranged on the mounting plate.

[0011] The utility model further sets up: the elastic holding part is spring.

[0012] Summarized above, the beneficial effects of the utility model lie in:

[0013] 1, through the setting, when the swing arm is detached from the pump body, the transmission key on the second transmission shaft will be under the influence of the separation mechanism and exit the first transmission groove, at this time, the rotation of the second rotating shaft cannot make the first rotating shaft rotate, so the pump body locking will not appear the problem of false start.

[0014] 2, the mounting plate and the connecting block are rotationally connected, which can make the rotation of the swing arm and the thread connection between the connecting cover and the outer tube independent of each other, preventing the swing arm from separating the connecting cover and the outer tube due to rotation. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0016] Figure 1 It is the overall structure schematic diagram of the utility model;

[0017] Figure 2 It is the local section structure schematic diagram of the utility model;

[0018] Figure 3 For Figure 2 A local enlarged view of the middle part.

[0019] Figure label: 1 pump body, 2 rocker arm, 21 connecting block, 22 second transmission groove, 23 connecting cover, 24 mounting plate, 25 abutting ring, 31 outer cylinder, 32 inner cylinder, 33 shutter, 34 elastic abutting piece, 35 first transmission shaft, 36 second transmission shaft, 37 transmission key, 38 first transmission groove. DETAILED DESCRIPTION

[0020] The utility model discloses an embodiment of the utility model will be described below with reference to the drawings of the utility model embodiment Figures 1-3 , the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the embodiment described is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor are within the scope of the utility model protection.

[0021] Embodiment:

[0022] As Figures 1 to 3 shown, the utility model discloses a can prevent false start hand -operated pump, including pump body 1 and rocker arm 2, wherein, the outer side wall of pump body 1 is fixedly arranged with operation store, and the operation store is provided with first transmission shaft 35, and the first transmission shaft 35 is rotatably arranged on pump body 1 and one end is inserted into the inside of pump body 1, and the first rotary shaft is used to drive the inside parts of pump body 1 to work, which is prior art, so this paper does not carry on the detailed description.

[0023] The second transmission shaft 36 is slidably arranged on the operation store, as Figure 3 shown, one end of the second transmission shaft 36 is inserted into the operation store and points to the first transmission shaft 35, and the other end is outside the operation store, and in the structure, the first transmission groove 38 is formed in the end of the first transmission shaft 35 close to the second transmission shaft 36, and correspondingly, the transmission key 37 is fixedly arranged on the end of the second transmission shaft 36 close to the first transmission shaft 35 corresponding to the first transmission groove 38, and at the same time, the separation mechanism for making the transmission key 37 exit the first transmission groove 38 is arranged in the operation store, and in the structure, the rocker arm 2 is detachably connected with the pump body 1, and the second transmission groove 22 is formed in the rocker arm 2 corresponding to the second rotary shaft, and the synchronous rotation mechanism for making the transmission key 37 enter the first transmission groove 38 is arranged on the rocker arm 2.

[0024] The working principle of the above structure is as follows: After the rocker arm 2 is installed on the pump body 1, the rocker arm 2 is connected to the second transmission shaft 36. At the same time, the synchronous rotation mechanism is used to make the transmission key 37 enter the first transmission groove 38. At this time, when the rocker arm 2 rotates, the rocker arm 2, the second transmission shaft 36, and the first transmission shaft 35 rotate together, thereby driving the pump body 1 to work. When the rocker arm 2 is removed from the pump body 1, the separation mechanism is used to make the transmission key 37 exit the first transmission groove 38. At this time, no matter how the exposed second transmission shaft 36 rotates, it will not affect the stationary state of the first transmission shaft 35.

[0025] Furthermore, the operating chamber includes an outer cylinder 31 and an inner cylinder 32, wherein the outer cylinder 31 is fixedly connected to the pump body 1, the inner cylinder 32 is slidably disposed on the inner side wall of the inner cylinder 32, a baffle 33 is disposed on the end of the inner cylinder 32 away from the pump body 1, the middle part of the second drive shaft 36 is rotatably connected to the baffle 33, and the drive key 37 is located between the baffle 33 and the first drive shaft 35, and the separation mechanism includes an elastic abutment member 34 abutting between the outer side wall of the pump body 1 and the baffle 33, the elastic abutment member 34 being a spring.

[0026] The synchronous rotation mechanism includes a supporting part, which is mounted on the rocker arm 2. The supporting part, along with the rocker arm 2, pushes the cover plate 33 toward the pump body 1. Specifically:

[0027] The rocker arm 2 includes a connecting block 21 for connecting to the second drive shaft 36, and the supporting part includes a connecting cover 23 and a supporting ring 25, wherein the connecting cover 23 is used for detachable connection with the outer cylinder 31, see reference. Figure 3 A mounting plate 24 is provided on the end of the connecting cover 23 away from the pump body 1. The mounting plate 24 is sleeved on the outer wall of the connecting block 21 and connected to the connecting block 21. The abutment ring 25 is fixedly installed on the mounting plate 24 and extends in the direction of the pump body 1. In this structure, the abutment ring 25 is sleeved on the outside of the connecting block 21, and the end of the abutment ring 25 away from the mounting plate 24 is used to abut against the end of the cover 33 away from the pump body 1.

[0028] Furthermore, the inner wall of the connecting cover 23 is detachably connected to the outer wall of the outer cylinder 31 via a threaded connection, and the connecting block 21 is rotatably mounted on the mounting plate 24.

[0029] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hand-cranked pump that can prevent accidental start-up, comprising a pump body (1) and a rocker arm (2), characterized in that: An operating chamber is fixedly installed on the outer wall of the pump body (1). A first drive shaft (35) is installed inside the operating chamber. The first drive shaft (35) is rotatably mounted on the pump body (1). One end of the first drive shaft (35) passes into the pump body (1). A second drive shaft (36) is slidably installed on the operating chamber. One end of the second drive shaft (36) is outside the operating chamber, and the other end passes into the operating chamber and points towards the first drive shaft (35). A first transmission shaft is opened on the end of the first drive shaft (35) near the second drive shaft (36). The second drive shaft (36) is fixedly provided with a drive key (37) on the end of the second drive shaft (35) near the first drive shaft (38). The operating chamber is provided with a separation mechanism for disengaging the drive key (37) from the first drive groove (38). The rocker arm (2) is detachably connected to the pump body (1). The rocker arm (2) is provided with a second drive groove (22) corresponding to the second rotating shaft. The rocker arm (2) is provided with a synchronous rotation mechanism for disengaging the drive key (37) into the first drive groove (38).

2. A hand-cranked pump that can prevent accidental start-up according to claim 1, characterized in that: The operating chamber includes an outer cylinder (31) and an inner cylinder (32). The outer cylinder (31) is fixedly connected to the pump body (1). The inner cylinder (32) is slidably disposed on the inner side wall of the inner cylinder (32). A baffle (33) is provided on the end of the inner cylinder (32) away from the pump body (1). The middle part of the second drive shaft (36) is rotatably connected to the baffle (33). The separation mechanism includes an elastic abutment (34) that abuts against the outer side wall of the pump body (1) and the baffle (33).

3. A hand-cranked pump that can prevent accidental start-up according to claim 2, characterized in that: The synchronous rotation mechanism includes a supporting part, which is disposed on the rocker arm (2). The supporting part pushes the cover plate (33) toward the pump body (1) as the rocker arm (2) is installed.

4. A hand-cranked pump that can prevent accidental start-up according to claim 3, characterized in that: The supporting part includes a connecting cover (23) and a supporting ring (25). The connecting cover (23) is used to detachably connect with the outer cylinder (31). The rocker arm (2) includes a connecting block (21) for connecting with the second drive shaft (36). One end of the connecting cover (23) is provided with a mounting plate (24). The mounting plate (24) is sleeved on the outer side wall of the connecting block (21) and connected to the connecting block (21). The supporting ring (25) is fixedly set on the mounting plate (24) and extends to the other end of the connecting cover (23). The supporting ring (25) is sleeved on the outside of the connecting block (21). The end of the supporting ring (25) away from the mounting plate (24) is used to support the end of the shield (33) away from the pump body (1).

5. A hand-cranked pump according to claim 4 that can prevent accidental start-up, characterized in that: The inner wall of the connecting cover (23) is detachably connected to the outer wall of the outer cylinder (31) by means of a threaded connection.

6. A hand-cranked pump according to claim 5 that can prevent accidental start, characterized in that: The connecting block (21) is rotatably mounted on the mounting plate (24).

7. A hand-cranked pump according to claim 2 that can prevent accidental start, characterized in that: The elastic support member (34) is a spring.

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