Air cylinder assembly of electric hammer

Abstract

The electric hammer air cylinder assembly comprises an output shaft and a connecting shaft sleeve, the connecting shaft sleeve is movably connected to the output shaft in an inserted mode, the end, corresponding to the connecting shaft sleeve, of the output shaft is connected with a thread sleeve through threads, and the outer side of the connecting shaft sleeve is provided with threads used for being in threaded connection with the thread sleeve. A drill bit rod is movably inserted into the connecting shaft sleeve, a reset spring movably sleeves the drill bit rod, a sliding sleeve is movably inserted into the output shaft, an impact block is movably connected into the sliding sleeve, the impact block is in sealed connection with the drill bit rod, and a connecting rod is connected to the end, away from the drill bit rod, of the sliding sleeve through a pin shaft. A micro motor is installed at the end, away from the connecting shaft sleeve, of the output shaft, a driving gear is fixedly installed at the shaft end of the micro motor, the side wall of the output shaft is rotationally connected with a driven gear, and the driving gear is meshed with the driven gear. The electric hammer can reduce contact friction of components in the use process of the electric hammer, and the use effect of the electric hammer is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric hammers, in particular to an electric hammer cylinder assembly. Background Art

[0002] The cylinder impact hammer refers to the core component inside the electric hammer that provides impact force for the impact block. Its stability directly determines the stability of the electric hammer when carrying out subsequent impact work.

[0003] The existing electric hammer cylinder impact hammer generally uses the air pressure generated by the piston block to cause the impact block to impact the impact block. The impact block is usually placed inside the electric hammer cylinder without any restrictions. During the impact process of the impact block moving back and forth, it will also rotate accordingly. The wear between the impact block and the inner wall of the cylinder is relatively serious, which greatly affects its own service life. It is difficult to produce a stable and reliable impact on the external force-bearing object, which affects the service life of the components. To this end, we propose an electric hammer cylinder assembly. Utility Model Content

[0004] The purpose of the utility model is to provide an electric hammer cylinder assembly to solve the problem that the existing electric hammer cylinder impact hammer proposed in the above-mentioned background technology will also produce corresponding rotation during the impact process of the impact block moving back and forth, and the wear between the impact block and the inner wall of the cylinder is relatively serious, which greatly affects the service life of the hammer itself, and it is difficult to generate stable and reliable impact on external force-bearing objects, which affects the service life of the components.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric hammer cylinder assembly comprises an output shaft and a connecting sleeve, the connecting sleeve is movably inserted on the output shaft, the end of the output shaft corresponding to the connecting sleeve is connected with a screw sleeve through a thread, the outer side of the connecting sleeve is provided with a thread for threaded connection with the screw sleeve, a drill rod is movably inserted inside the connecting sleeve, a return spring is movably sleeved on the drill rod, a piston cylinder is movably inserted inside the output shaft, an impact block is movably connected inside the piston cylinder, the impact block is contacted and connected with the drill rod, one end of the piston cylinder away from the drill rod is connected to the connecting rod through a pin, a micro motor is installed on one end of the output shaft away from the connecting sleeve, a driving gear is fixedly installed on the shaft end of the micro motor, a driven gear is rotatably connected to the side wall of the output shaft, and the driving gear and the driven gear are meshed.

[0006] Preferably, the connecting rod and the driven gear are connected via a pin, and the center lines of the driven gear and the driving gear are perpendicular to each other.

[0007] Preferably, the impact block is in active contact with the drill bit rod, and the centers of the impact block and the drill bit rod are collinear.

[0008] Preferably, a ball bearing is provided between the piston cylinder and the output shaft.

[0009] Preferably, the output shaft and the connecting sleeve are respectively provided with a first limiting groove and a second limiting groove for ball sliding.

[0010] Preferably, the first limiting groove and the second limiting groove are internally connected.

[0011] Preferably, the return spring is arranged inside the connecting sleeve.

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

[0013] 1. The electric hammer cylinder assembly is provided with a connecting sleeve on the output shaft of the electric hammer. When the output shaft of the electric hammer drives the drill rod, the micro motor is turned on, the driving gear and the driven gear are meshed, and the driven gear can be rotated. Through the connection of the connecting rod, the piston cylinder can reciprocate inside the output shaft, thereby compressing the gas inside the space formed by the piston cylinder and the impact block. After the gas is compressed to a certain condition, the impact block can hit the drill rod, thereby realizing the reciprocating hammering motion while realizing the rotation of the drill rod;

[0014] 2. The electric hammer cylinder assembly uses a screw sleeve to connect the connecting sleeve and the output shaft, and sets a second limit groove and a first limit groove on the corresponding connecting sleeve and the output shaft, and movably connects the ball inside the second limit groove and the first limit groove. The ball can make the contact between the piston cylinder and the output shaft a rolling contact, which reduces the contact friction during the use of the electric hammer. The impact block is set inside the piston cylinder to avoid the contact friction between the impact block and the output shaft, and will not affect the use of the electric hammer; and when the connecting sleeve and the output shaft are separated, the ball can be replaced, which further ensures the use effect of the electric hammer. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of a half-section structure of the utility model;

[0018] Figure 4 For the utility model Figure 3 Enlarged view of point M.

[0019] In the figure: 1, output shaft; 2, connecting sleeve; 3, screw sleeve; 4, drill rod; 5, limit groove 1; 6, micro motor; 7, driving gear; 8, driven gear; 9, connecting rod; 91, piston cylinder; 92, impact block; 93, return spring; 94, limit groove 2; 95, ball. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example: See Figure 1-4 , the utility model provides a technical solution: an electric hammer cylinder assembly, mainly for the existing electric hammer cylinder impact hammer, in which the impact block will rotate accordingly during the impact process of reciprocating left and right movement, and the wear between the impact block and the inner wall of the cylinder is relatively serious, which greatly affects its own service life, and it is difficult to produce a stable and reliable impact on the external force-bearing object, and the problem of affecting the service life of the components is improved. The specific scheme is as follows: it includes an output shaft 1 and a connecting sleeve 2, wherein the centers of the output shaft 1 and the connecting sleeve 2 are collinear. The connecting sleeve 2 is movably plugged into the output shaft 1, and the end of the output shaft 1 corresponding to the connecting sleeve 2 is threadedly connected with a screw sleeve 3, and the outer side of the connecting sleeve 2 is provided with a thread for threaded connection with the screw sleeve 3. Through the setting of the screw sleeve 3, the output shaft 1 and the connecting sleeve 2 can be easily connected.

[0022] Furthermore, a drill rod 4 is movably inserted inside the connecting sleeve 2, and a reset spring 93 is movably sleeved on the drill rod 4. The reset spring 93 is arranged inside the connecting sleeve 2. The reset spring 93 can restore the drill rod 4 to its initial state. A piston cylinder 91 is movably inserted inside the output shaft 1, and a strike block 92 is movably connected inside the piston cylinder 91. The strike block 92 is in contact with the drill rod 4, and the strike block 92 and the drill rod 4 are in movably contact, and the centers of the strike block 92 and the drill rod 4 are collinear. The strike block 92 continuously strikes the drill rod 4, so that the reset spring 93 is compressed; and when the strike block 92 does not strike, the drill rod 4 is restored to its initial state by the elastic reset action of the reset spring 93. Through the reciprocating operation of the above steps, the drill rod 4 can be processed.

[0023] Furthermore, a connecting rod 9 is connected to one end of the piston cylinder 91 away from the drill rod 4 through a pin shaft, and a micro motor 6 is installed at one end of the output shaft 1 away from the connecting sleeve 2. The micro motor 6 is connected to the control switch through a wire, and a driving gear 7 is fixedly installed on the shaft end of the micro motor 6. After the micro motor 6 is turned on, the micro motor 6 can make the driving gear 7 rotate. A driven gear 8 is rotatably connected to the side wall of the output shaft 1, and the driving gear 7 and the driven gear 8 are meshed. Through the meshing action of the driving gear 7 and the driven gear 8, the driving gear 7 rotates, and then the driven gear 8 can be driven to rotate.

[0024] It is worth noting that the connecting rod 9 and the driven gear 8 are connected by a pin shaft, and the center lines of the driven gear 8 and the driving gear 7 are perpendicular to each other. When the micro motor 6 is turned on, the driving gear 7 and the driven gear 8 are meshed, which can make the driven gear 8 rotate. When the driven gear 8 rotates, the piston cylinder 91 can reciprocate inside the output shaft 1 through the connecting action of the connecting rod 9, thereby compressing the gas inside the space composed of the piston cylinder 91 and the impact block 92. After the gas is compressed to a certain condition, the impact block 92 can hit the drill rod 4, thereby realizing the reciprocating hammering motion of the drill bit.

[0025] See also Figure 3 , wherein a ball 95 is provided between the piston cylinder 91 and the output shaft 1. A limit groove 1 5 and a limit groove 2 94 for the ball 95 to slide are provided on the output shaft 1 and the connecting sleeve 2, respectively. The limit groove 1 5 and the limit groove 2 94 are internally connected. The ball 95 is provided between the piston cylinder 91 and the output shaft 1, so that the contact between the piston cylinder 91 and the output shaft 1 is a rolling contact, which reduces the contact friction during the use of the electric hammer. The impact block 92 is provided inside the piston cylinder 91, which can avoid the contact friction between the impact block 92 and the output shaft 1, and will not affect the use of the electric hammer.

[0026] Working principle: When the electric hammer cylinder assembly is in use, the output shaft 1 drives the drill rod 4 to rotate; in this process, the micro motor 6 is turned on, and when the micro motor 6 is turned on, the driving gear 7 and the driven gear 8 are engaged, which can make the driven gear 8 rotate. When the driven gear 8 rotates, the piston cylinder 91 can reciprocate inside the output shaft 1 through the connecting action of the connecting rod 9, thereby compressing the gas inside the space composed of the piston cylinder 91 and the impact block 92. After the gas is compressed to a certain condition, the impact block 92 can hit the drill rod 4, thereby realizing reciprocating hammering motion while the drill rod 4 rotates.

[0027] Although 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. An electric hammer cylinder assembly, comprising an output shaft (1) and a connecting sleeve (2), characterized in that: The connecting sleeve (2) is movably plugged into the output shaft (1); the end of the output shaft (1) corresponding to the connecting sleeve (2) is connected to a screw sleeve (3) through a thread; the outer side of the connecting sleeve (2) is provided with a thread for being threadedly connected to the screw sleeve (3); a drill rod (4) is movably plugged into the connecting sleeve (2); a return spring (93) is movably sleeved on the drill rod (4); a piston cylinder (91) is movably plugged into the output shaft (1); and the piston cylinder (91) is movably connected to the inner side of the connecting sleeve (2). A striking block (92) is connected, the striking block (92) is in contact with the drill rod (4), one end of the piston cylinder (91) away from the drill rod (4) is connected to a connecting rod (9) via a pin shaft, one end of the output shaft (1) away from the connecting sleeve (2) is installed with a micro motor (6), a driving gear (7) is fixedly installed on the shaft end of the micro motor (6), and a driven gear (8) is rotatably connected to the side wall of the output shaft (1), and the driving gear (7) and the driven gear (8) are meshed.

2. The electric hammer cylinder assembly according to claim 1, characterized in that: The connecting rod (9) and the driven gear (8) are connected via a pin shaft, and the center lines of the driven gear (8) and the driving gear (7) are perpendicular to each other.

3. The electric hammer cylinder assembly according to claim 1, characterized in that: The impact block (92) is in active contact with the drill rod (4), and the centers of the impact block (92) and the drill rod (4) are collinear.

4. The electric hammer cylinder assembly according to claim 1, characterized in that: A ball (95) is provided between the piston cylinder (91) and the output shaft (1).

5. The electric hammer cylinder assembly according to claim 4, characterized in that: The output shaft (1) and the connecting sleeve (2) are respectively provided with a first limiting groove (5) and a second limiting groove (94) for the balls (95) to slide.

6. The electric hammer cylinder assembly according to claim 5, characterized in that: The first limiting groove (5) and the second limiting groove (94) are internally connected.

7. The electric hammer cylinder assembly according to claim 1, characterized in that: The return spring (93) is arranged inside the connecting sleeve (2).

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