WO2011026416A1

WO2011026416A1 - Pressure sensor of intelligent mower

Info

Publication number: WO2011026416A1
Application number: PCT/CN2010/076482
Authority: WO
Inventors: 钱兴桂
Original assignee: 嘉兴亚特园林机械研究所
Priority date: 2009-09-04
Filing date: 2010-08-31
Publication date: 2011-03-10
Also published as: CN201595021U

Abstract

A pressure sensor of an intelligent mower comprises a base (1) and an upper cover (2). An on-off control structure is provided between the base and the upper cover for controlling the working state of the mower. The on-off control structure comprises a contact clip assembly (4) which is fixedly connected to the upper cover and in series with the working circuit of the mower and a trigger part provided on the base for triggering the contact clip assembly to start. The trigger part comprises a trigger post provided on the base. The sensor has simple structure and precise control.

Description

Intelligent mower pressure sensor

Technical field

Background technique

With the growing maturity of mowing robot technology and some safety requirements, pressure sensors are gradually being applied to intelligent lawn mowers. On September 26, 2007, the State Intellectual Property Office of China announced a utility model patent entitled Pressure Sensor, Bulletin No. CN200952967. According to the specification and the drawings, the pressure sensor includes an upper cover with a detection hole and a PCB. The plate and the pressure chip connected to the PCB board point, the pressure chip is clamped by the PCB board and the upper cover, the sensing terminal of the pressure chip corresponds to the position of the pressure detecting hole of the upper cover, and the upper cover is provided with an elastic buckle, the PCB board The card hole is matched with the elastic buckle; the buckle fastened in the card hole fixes the relative position of the upper cover, the PCB board and the pressure chip. However, the pressure sensor has a complicated structure, is inconvenient to install, and requires a relatively complicated discriminating circuit, and the cost is also high. Utility model content

The utility model aims to provide a novel intelligent lawn mower pressure sensor, which has the advantages of simple structure, high sensitivity, precise control, stable and reliable measuring range, and improves the quality of the product.

In order to solve the above technical problem, the utility model adopts the following technical solutions: The new intelligent lawn mower pressure sensor comprises a base and an upper cover connected to each other, and is characterized in that: the working state of the lawn mower is controlled between the base and the upper cover. The on-off control structure includes a contact piece assembly fixedly connected to the lawn mower working circuit fixedly connected to the upper cover, and a triggering portion provided on the base for triggering the action of the contact piece assembly, A predetermined safety distance N is maintained between the trigger portion and the contact piece assembly.

Preferably, the top of one side of the base is provided with a connecting post, the bottom of the upper cover is provided with a connecting groove corresponding to the connecting post, and the connecting post is sleeved with an elastic member, and the two ends of the elastic member respectively abut Living connection column Description

And the end of the connecting groove maintains a moving distance M between the top end surface of the connecting post and the bottom end surface of the connecting groove.

The arrangement of the on-off control structure may also be replaced by the following structure, that is, the on-off control structure includes two pieces of contact pieces fixedly connected to the base, and the two contact pieces are separated by an insulating member, and the contact piece extends to the bottom of the bottom of the upper cover. The bottom of the upper cover pushes the two contact pieces into contact.

Preferably, the triggering portion includes a triggering column disposed on the base, and the triggering column is further provided with a telescopic adjustment, and the telescopic adjustment structure is an adjusting screw, and the structure is simple.

The on-off control structure is replaced by a top portion disposed on the other side of the base. The on-off control structure includes two pieces of contact pieces fixedly connected to the base, and the two contact pieces are separated by an insulating member, and the contact piece extends to the bottom of the upper cover. Below, the bottom of the upper cover pushes the two contact pieces into contact.

Preferably, the upper cover is provided with an internally threaded hole and a corresponding fastening bolt, and the fastening bolt is connected to the internal threaded hole from the bottom to the top through the contact piece assembly to realize the fixing of the contact piece, and the fixing manner is reliable.

Preferably, the upper cover is provided with an upper fixing post, and the internally threaded hole is disposed on the upper fixing post.

In addition, the center of the connecting column is provided with a guiding hole, and the guiding column corresponding to the guiding hole is arranged in the base, and the guiding structure ensures the reliability of the upper cover moving up and down, and also limits the horizontal movement of the upper cover.

Preferably, the elastic member is made of a spring or a rubber elastic body, which is reliable in operation and low in price.

The utility model adopts the above technical scheme, effectively realizes the pressure sensing effect through the setting of the on-off control structure, and accurately realizes the on-off of the lawn mower when the pressure reaches the limit value, and the alternative structure discriminating circuit is simple, only the switch In both cases, the cost is lower than that of the sensor. At the same time, the mechanical part of the replacement structure is simple and reliable, and the assembly is simple. The setting of the telescopic adjustment structure can effectively avoid the slight deformation or the installation of the casing due to the production of the product casing. The existing dimensional error has an influence on the action of the on-off control structure, the structure is simple, the sensitivity is high, the control is accurate, the measurement range is stable and reliable, and the quality of the product is improved. Instruction manual

DRAWINGS

The utility model will be further described below with reference to the accompanying drawings:

1 is a schematic structural view of a pressure sensor of a novel intelligent lawn mower according to the present invention;

Figure 2 is a schematic view of the structure of Figure 1 after being pressed;

Figure 3 is a schematic enlarged view of the structure I in Figure 1;

Figure 4 is a schematic enlarged view of the structure II in Figure 1;

Figure 5 is another embodiment of the present invention. detailed description

As shown in FIG. 1 to FIG. 4 , the pressure sensor of the intelligent lawn mower of the utility model comprises a base 1 and an upper cover 2 connected to each other, and an on/off control for controlling the working state of the lawn mower is arranged between the base and the upper cover. Structure, the on/off control structure includes a contact piece assembly 4 fixedly connected to the lawn mower working circuit fixedly connected to the upper cover 2, and a triggering portion provided on the base for triggering the action of the contact piece assembly, the triggering portion The triggering portion 7 includes a triggering post 7 disposed on the base, and the triggering post is further provided with a telescopic adjusting structure for adjusting the distance between the triggering portion and the contact piece assembly to achieve The safety clearance N is predetermined, and the telescopic adjustment structure is preferably an adjustment screw 5.

The base 1 and the upper cover 2 may be rigidly connected, such as a direct screw fixed connection; or may be connected in a flexible manner, that is, FIG.

The bottom portion is provided with a connecting groove 21 corresponding to the connecting post, the connecting post is sleeved with an elastic member 3, and the elastic member is a spring or a rubber elastic body, and the two ends of the elastic member respectively abut the connecting post 11 and the connecting groove 21 The end portion maintains a top surface of the connecting post and a bottom end surface of the connecting groove at a moving distance M, and the predetermined safety distance N is less than or equal to the moving distance M.

The contact piece assembly 4 can be selected from two parallel contact pieces, and the two contact pieces are separated by an insulating member, and the two contact pieces respectively lead a wire to be connected in series in the mower working circuit. Description

The action triggering displacement of the on-off control structure is the pitch of the two contact pieces in the contact piece assembly 4 plus a predetermined safety distance N between the trigger portion and the contact piece assembly, and the sum of the pitches is less than or equal to the moving pitch ^1. N can be 0, that is, the action triggering displacement of the on-off control structure is the spacing of the two contact pieces in the contact piece assembly 4.

In the utility model, the upper cover 1 is provided with an internally threaded hole 13 and a corresponding fastening bolt 6, and the fastening bolt 6 is connected from the bottom to the top through the contact piece assembly 4 in the internal threaded hole 13 to realize the contact piece assembly. The fixing of the 4 is reliable, and the upper cover is provided with an upper fixing post 8 which is arranged on the upper fixing post to reduce the material dosage and cost and reduce the weight of the product. The center of the connecting column 11 is provided with a guiding hole 12, and the base 1 is provided with a guiding column 22 corresponding to the guiding hole 12, which can restrict the movement of the upper cover 2 in a certain range in the horizontal direction while guiding. A plurality of such alternative structures can be provided on the lawn mower to reduce the rigidity requirement of the upper cover 2 and improve the sensitivity of the induction, thereby avoiding the disadvantages of uneven pressure distribution and inconvenience of calculation caused by using multiple pressure sensors.

The contact piece assembly of the present invention may also adopt other structures.

As shown in FIG. 5, the on-off control structure of the present invention can also be replaced with a top portion disposed on the other side of the base. The on-off control structure includes two pieces of contact piece 41 fixedly connected to the base 1, and the two contact pieces are insulated by The pieces are separated, the contact piece extends to the lower side of the bottom of the upper cover 2, and the bottom of the upper cover 2 pushes the two contact pieces to contact. The base is provided with an internally threaded hole 13 and a corresponding fastening bolt 6. The fastening bolt 6 is fastened from top to bottom through two contact pieces to connect the internally threaded holes to secure the contact piece 41.

When the mower is subjected to external pressure, the spring is compressed. When the spring is compressed to the state shown in Fig. 2, the two contact pieces of the contact piece assembly 4 are in contact, the line is turned on, and the mower is suspended. When the external pressure disappears or falls below the limit value, the spring begins to recover and the spring's restoring force pushes the upper cover 2 upwards, the two contact pieces are disengaged, the line is disconnected, and the mower resumes operation.

Claims

Claim

1. The new intelligent lawn mower pressure sensor comprises a base (1) and an upper cover (2) connected to each other, wherein: the base (1) and the upper cover are provided with an on/off switch for controlling the working state of the lawn mower. a control structure, the switch-off control structure comprising a contact piece assembly (4) fixedly connected to the lawn mower working circuit fixedly connected to the upper cover (2) and a triggering component assembly action on the base (1) The triggering portion maintains a predetermined safety distance N between the triggering portion and the contact piece assembly.

2. The novel intelligent lawn mower pressure sensor according to claim 1, wherein: the base

(1) The top of one side is provided with a connecting post (11), and the bottom of the upper cover (2) is provided with a connecting groove (21) corresponding to the connecting post (11), and the connecting post is sleeved with an elastic member ( 3), the two ends of the elastic member respectively abut the end portions of the connecting post (11) and the connecting groove (21) to maintain a moving distance M between the top end surface of the connecting post and the bottom end surface of the connecting groove.

3. The novel intelligent lawn mower pressure sensor according to claim 1 or 2, wherein: the triggering portion (7) comprises a triggering column (7) disposed on the base, and the triggering column (7) is further provided A telescopic adjustment structure (5) is used to adjust the distance between the trigger portion and the contact piece assembly to reach a predetermined safety interval N.

4. The novel intelligent lawn mower pressure sensor according to claim 1 or 2, wherein the telescopic adjustment structure (5) is an adjustment screw.

5. The novel intelligent lawn mower pressure sensor according to claim 1 or 2, wherein: the on-off control structure is replaced with a top portion disposed on the other side of the base, and the on-off control structure includes two pieces of fixed connection The upper part (1) has a contact piece (41), and the two contact pieces are separated by an insulating member, the contact piece extends to the lower side of the bottom of the upper cover (2), and the bottom of the upper cover (2) pushes the two contact pieces to contact.

6. The novel intelligent lawn mower pressure sensor according to claim 3, wherein: the upper cover

(2) an internal threaded hole (13) and a corresponding fastening bolt (6) are provided, and the fastening bolt (6) is connected to the internal threaded hole (13) through the contact piece assembly (4) from bottom to top. The fixing of the contact piece assembly (4) is achieved.

7. The novel intelligent lawn mower pressure sensor according to claim 6, wherein: the upper cover is provided with an upper fixing column (8), and the internal threaded hole is disposed on the upper fixing column. Claim

The new intelligent lawn mower pressure sensor according to claim 1 or 2, characterized in that: the center of the connecting column (11) is provided with a guiding hole (12), and the base (1) is provided and guided The guide post (22) corresponding to the hole.

The novel intelligent lawn mower pressure sensor according to claim 1 or 2, characterized in that the elastic member (3) is made of a spring or a rubber elastic body.