Pulse width modulation driver

Abstract

The utility model discloses a pulse width modulation driver, which belongs to the technical field of electronic equipment, and comprises a protective shell and a driver body arranged in the protective shell, the protective shell comprises a bottom plate and an upper cover, the two sides of the bottom plate are provided with bumps, the two sides of the upper cover are reserved with grooves matched with the bumps, and the bumps are arranged in the grooves. Connecting grooves are formed in the two side walls of the groove, a connecting assembly is arranged in the protruding block, the connecting assembly comprises connecting blocks, springs, buttons, connecting ropes and pulleys, the connecting blocks are installed on the two sides of the protruding block in a sliding mode, the springs abut against one ends of the connecting blocks, the buttons are installed on the outer side of the protruding block in a sliding mode, and the connecting ropes abut against the connecting ropes. The connecting rope is connected between the button and the connecting block; through the arrangement of the convex block, the groove, the connecting groove and the connecting assembly, during disassembly, the upper cover can be opened only by pressing the button and driving the connecting rope through the button to pull out the connecting block from the connecting groove, screws do not need to be disassembled, and installation and maintenance are convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic equipment, and in particular relates to a pulse width modulation driver. Background Art

[0002] PWM (Pulse Width Modulation) control is widely used in DC motor drive. This drive mode has the advantages of continuous regulation and high efficiency. In some applications, it is necessary to achieve the function of keeping the average voltage output of PWM drive basically constant when the supply voltage changes. For example, in automobile fuel control, under certain working conditions, the supply voltage is allowed to fluctuate within a certain range, but the average voltage at the motor end needs to be constant to ensure stable fuel supply.

[0003] In the prior art, a pulse width modulation driver usually has a protective shell. However, the protective shell of the pulse width modulation driver is fixed, installed and removed by a screw structure, which is very troublesome to install and repair. The screws need to be removed before installation. There is an urgent need for a pulse width modulation driver with a simple structure that is easy to repair and install. Utility Model Content

[0004] The purpose of the utility model is to provide a pulse width modulation driver to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a pulse width modulation driver, comprising a protective shell and a driver body arranged in the protective shell, the protective shell comprising a bottom plate and an upper cover, the upper cover is arranged above the bottom plate, both sides of the bottom plate are provided with protrusions, both sides of the upper cover are reserved with grooves adapted to the protrusions, both side walls of the groove are provided with connecting grooves, and the protrusions are provided with connecting components;

[0006] The connecting assembly includes a connecting block, a spring, a button, a connecting rope and a pulley. The connecting block is slidably installed on both sides of the protrusion, the spring abuts against one end of the connecting block, the button is slidably installed on the outside of the protrusion, the connecting rope is connected between the button and the connecting block, the pulley is rotatably installed in the protrusion, and the connecting rope is overlapped on the pulley.

[0007] As a preferred embodiment, positioning holes are provided at the four corners of the bottom plate, and positioning columns matching the positioning holes are fixedly connected to the four corners of the bottom of the upper cover.

[0008] As a preferred implementation, an end of the connection block away from the spring is provided with an inclined surface, and the inclined surface faces in a direction away from the bottom plate.

[0009] As a preferred implementation, a limiting block is provided at one end of the connecting block close to the spring.

[0010] As a preferred implementation, a guide post is provided inside the protrusion, and the button is slidably sleeved on the guide post.

[0011] As a preferred implementation, limiting plates are provided on both sides of the button.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The pulse width modulation driver is provided with a protrusion, a groove, a connection groove and a connection assembly. When installing, the protrusion is inserted into the grooves on both sides of the upper cover. When the connection block is aligned with the connection groove, the elastic force exerted by the spring on the connection block drives the connection block to be inserted into the connection groove to fix the upper cover. When disassembling, it is only necessary to press a button to drive one end of the connection rope to slide toward the guide column through the button. Under the guidance of the pulley, the connection rope moves with the pulley, so that the connection rope pulls the connection block to slide, and the connection block is pulled out of the connection groove, and the upper cover can be opened without removing the screws, which is convenient for installation and maintenance.

[0014] The pulse width modulation driver is provided with a positioning hole and a positioning post. When the upper cover is closed, the positioning post is inserted into the positioning hole to quickly position the upper cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the top cross-sectional structure of the projection of the utility model.

[0018] In the figure: 1. protective shell; 11. bottom plate; 12. upper cover; 13. protrusion; 14. groove; 15. connecting groove; 16. connecting assembly; 161. connecting block; 162. spring; 163. button; 164. connecting rope; 165. pulley; 166. limit block; 167. guide column; 168. limit plate; 17. positioning hole; 18. positioning column; 2. driver body. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0021] See also Figure 1-3 The utility model provides a pulse width modulation driver, including a protective shell 1 and a driver body 2 arranged in the protective shell 1, the protective shell 1 includes a bottom plate 11 and an upper cover 12, the upper cover 12 is arranged above the bottom plate 11, and positioning holes 17 are opened at the four corners of the bottom plate 11, and positioning columns 18 adapted to the positioning holes 17 are fixedly connected to the four corners of the bottom of the upper cover 12. By setting the positioning holes 17 and the positioning columns 18, when the upper cover 12 is covered, the positioning columns 18 are inserted into the positioning holes 17 to quickly position the upper cover 12.

[0022] Reference Figure 2 and Figure 3 , both sides of the bottom plate 11 are provided with protrusions 13, both sides of the upper cover 12 are reserved with grooves 14 adapted to the protrusions 13, both side walls of the grooves 14 are provided with connecting grooves 15, and a connecting assembly 16 is provided in the protrusion 13, and the connecting assembly 16 includes a connecting block 161, a spring 162, a button 163, a connecting rope 164 and a pulley 165, and the connecting block 161 is slidably mounted on both sides of the protrusion 13, and the spring 162 abuts against one end of the connecting block 161, and an end of the connecting block 161 away from the spring 162 is provided with an inclined surface, and the inclined surface faces the direction away from the bottom plate 11, by setting the protrusion 13, The groove 14, the connecting groove 15 and the connecting assembly 16, during installation, the protrusion 13 is inserted into the grooves 14 on both sides of the upper cover 12, and when the connecting block 161 is aligned with the connecting groove 15, the elastic force applied by the spring 162 to the connecting block 161 drives the connecting block 161 to be inserted into the connecting groove 15, thereby fixing the upper cover 12, thereby facilitating installation; a limit block 166 is provided at one end of the connecting block 161 close to the spring 162, and by setting the limit block 166, a limiting effect can be exerted on the connecting block 161, thereby ensuring the stability of the connecting block 161 and preventing the connecting block 161 from detaching from both ends of the protrusion 13.

[0023] Reference Figure 2 and Figure 3 The button 163 is slidably mounted on the outer side of the protrusion 13, and a guide column 167 is provided inside the protrusion 13. The button 163 is slidably sleeved on the guide column 167, and the connecting rope 164 is connected between the button 163 and the connecting block 161. The pulley 165 is rotatably mounted in the protrusion 13, and the connecting rope 164 is overlapped on the pulley 165. By setting the button 163, when disassembling, it is only necessary to press the button 163, and the button 163 drives one end of the connecting rope 164 to slide toward the guide column 167. Under the guidance of the pulley 165, the connecting rope 164 moves with the pulley 165, so that the connecting rope 164 pulls the connecting block 161 to slide, and the connecting block 161 is pulled out of the connecting groove 15, and the upper cover 12 can be opened, which is convenient for disassembly; both sides of the button 163 are provided with a limiting plate 168. By setting the limiting plate 168, the button 163 can be limited and the button 163 can be prevented from detaching from the surface of the protrusion 13.

[0024] The working principle and use process of the utility model are as follows: first, when closing the upper cover 12, the positioning column 18 is inserted into the positioning hole 17 to quickly position the upper cover 12. By setting the protrusions 13, the grooves 14, the connecting grooves 15 and the connecting components 16, during installation, the protrusions 13 are inserted into the grooves 14 on both sides of the upper cover 12. When the connecting block 161 is aligned with the connecting grooves 15, the elastic force applied by the spring 162 to the connecting block 161 drives the connecting block 161 to be inserted into the connecting grooves 15, so as to fix the upper cover 12, thereby facilitating installation. By setting the button 163, when disassembling, it is only necessary to press the button 163, and the button 163 drives one end of the connecting rope 164 to slide toward the guide column 167. Under the guidance of the pulley 165, the connecting rope 164 moves with the pulley 165, so that the connecting rope 164 pulls the connecting block 161 to slide, and the connecting block 161 is pulled out from the connecting groove 15, so that the upper cover 12 can be opened for easy disassembly.

[0025] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulse width modulation driver, comprising a protective housing (1) and a driver body (2) arranged in the protective housing (1), characterized in that: The protective housing (1) comprises a bottom plate (11) and an upper cover (12), wherein the upper cover (12) is arranged above the bottom plate (11), protrusions (13) are arranged on both sides of the bottom plate (11), grooves (14) adapted to the protrusions (13) are reserved on both sides of the upper cover (12), connecting grooves (15) are arranged on both side walls of the grooves (14), and a connecting component (16) is arranged inside the protrusion (13); The connecting assembly (16) comprises a connecting block (161), a spring (162), a button (163), a connecting rope (164) and a pulley (165); the connecting block (161) is slidably mounted on both sides of the protrusion (13); the spring (162) abuts against one end of the connecting block (161); the button (163) is slidably mounted on the outside of the protrusion (13); the connecting rope (164) is connected between the button (163) and the connecting block (161); the pulley (165) is rotatably mounted in the protrusion (13); and the connecting rope (164) is overlapped on the pulley (165).

2. A pulse width modulation driver according to claim 1, characterized in that: The four corners of the bottom plate (11) are provided with positioning holes (17), and the four corners of the bottom of the upper cover (12) are fixedly connected with positioning columns (18) that match the positioning holes (17).

3. A pulse width modulation driver according to claim 1, characterized in that: An end of the connection block (161) away from the spring (162) is provided with an inclined surface, and the inclined surface faces in a direction away from the bottom plate (11).

4. A pulse width modulation driver according to claim 1, characterized in that: A limiting block (166) is provided at one end of the connecting block (161) close to the spring (162).

5. The pulse width modulation driver according to claim 1, characterized in that: A guide post (167) is provided inside the protrusion (13), and the button (163) is slidably sleeved on the guide post (167).

6. The pulse width modulation driver according to claim 1, characterized in that: Limiting plates (168) are provided on both sides of the button (163).

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