Electric hammer and electric drill structure

Abstract

An electric hammer and electric drill structure comprises a machine shell; the motor is arranged at one end of the machine shell; the change gear set is arranged in the machine shell, and the input end of the change gear set is in transmission connection with the output end of the motor; the driving shaft is arranged at the other end of the machine shell, the input end of the driving shaft is in transmission connection with the output end of the change gear set, and the output end of the driving shaft is used for being connected with a drill bit; and the transmission switching mechanism is arranged in the machine shell and is configured to be capable of switching the axial position degree of the driving shaft, so that the function of an electric drill or a hammer drill is achieved. According to the electric hammer and electric drill structure, the axial position degree of the driving shaft is controlled through the transmission switching mechanism, then the driving mode of the driving shaft is switched, the functions of an electric drill or an electric hammer are achieved, and the electric hammer and electric drill structure has the advantages of being simple in structure, convenient to control and switch and convenient to maintain and is suitable for being used and popularized.

Description

Technical Field

[0001] The utility model relates to the technical field of power tools, in particular to a structure of an electric hammer and electric drill. Background Art

[0002] An electric drill is a drilling tool powered by electricity, and some electric drills have the effect of an electric hammer and can be switched between use states. Generally, a drill bit is provided at the end of the electric drill to facilitate drilling into related objects to achieve drilling. In the existing electric hammer and electric drill, the electric hammer function is generally realized by the interference of steel balls and bumps on the output end, in cooperation with a spring. This kind of transmission structure has the following problems: (1) The axial length is relatively long, which is not convenient for miniaturization design; (2) There are many assembly parts, the assembly is complex, and the maintenance is difficult.

[0003] Therefore, in view of the deficiencies of the existing technology, it is necessary to design a structure of an electric hammer and electric drill to solve the above problems. Summary of the Utility Model

[0004] In order to overcome the above deficiencies in the existing technology, the purpose of the utility model is to provide a structure of an electric hammer and electric drill.

[0005] To achieve the above purpose and other related purposes, the technical solution provided by the utility model is: A structure of an electric hammer and electric drill, comprising:

[0006] A housing;

[0007] A motor, which is arranged at one end of the housing;

[0008] A speed change gear set, which is arranged in the housing, and the input end of the speed change gear set is in transmission connection with the output end of the motor;

[0009] A drive shaft, which is arranged at the other end of the housing, the input end of the drive shaft is in transmission connection with the output end of the speed change gear set, and the output end of the drive shaft is used to connect a drill bit;

[0010] A transmission switching mechanism, which is arranged in the housing and is configured to be able to switch the axial position degree of the drive shaft to realize the functions of an electric drill or a hammer drill.

[0011] The preferred technical solution is: The transmission switching mechanism is composed of a fixed ring, a movable ring and a limiting ring. The fixed ring and the limiting ring are both fixedly arranged in the housing and support the rotation of the drive shaft through bearings. The movable ring is fixedly arranged on the outer ring of the drive shaft. The lever on the movable ring extends out of the housing through the window on the housing and is used to control the circumferential position degree of the drive shaft; A spring is also sleeved on the drive shaft. One end of the spring abuts against the limiting ring, and the other end of the spring abuts against the movable ring.

[0012] The preferred technical solution is as follows: an active tooth surface is provided on the end surface of the movable ring facing the fixed ring, a fixed tooth surface is provided on the end surface of the fixed ring facing the movable ring, and the active tooth surface and the fixed tooth surface are correspondingly and matchingly arranged.

[0013] The preferred technical solution is as follows: at least three support claws arranged at equal angles are provided on the end surface of the movable ring facing the fixed ring, at least three grooves arranged at equal angles are provided on the end surface of the fixed ring facing the movable ring, and the support claws and the grooves are arranged in one-to-one correspondence; when the support claws are embedded in the grooves, the active tooth surface is in contact with the fixed tooth surface, and when the support claws are arranged outside the grooves, the active tooth surface is separated from the fixed tooth surface.

[0014] Due to the application of the above technical solution, the beneficial effects of the present utility model are as follows:

[0015] A structure of an electric hammer and an electric drill proposed by the present utility model controls the axial position accuracy of a drive shaft through a transmission switching mechanism, and further switches the driving mode of the drive shaft to realize the functions of an electric drill or an electric hammer. It has the characteristics of simple structure, convenient control and switching, and convenient maintenance, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the electric tool related to the present utility model.

[0017] Figure 2 It is a schematic diagram of the internal structure of the electric tool related to the present utility model.

[0018] Figure 3 It is a schematic diagram of the structure of the fixed ring related to the present utility model.

[0019] Figure 4 It is a schematic diagram of the structure of the movable ring related to the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0021] Please refer to Figures 1 - 4It should be noted that in the description of the present utility model, it should be noted that for the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. Terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0022] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] Embodiment:

[0024] As Figures 1 to 4 shown, according to a general technical concept of the present utility model, there is provided a structure of an electric hammer and electric drill, including:

[0025] Housing 1;

[0026] Motor 2, the motor 2 is arranged at one end of the housing 1;

[0027] Speed change gear set 3, the speed change gear set 3 is arranged in the housing 1, and the input end of the speed change gear set 3 is in transmission connection with the output end of the motor 2;

[0028] Drive shaft 4, the drive shaft 4 is arranged at the other end of the housing 1, the input end of the drive shaft 4 is in transmission connection with the output end of the speed change gear set 3, and the output end of the drive shaft 4 is used to connect the drill bit;

[0029] Transmission switching mechanism 5, the transmission switching mechanism 5 is arranged in the housing 1 and is configured to be able to switch the axial position degree of the drive shaft 4 to realize the functions of an electric drill or a hammer drill.

[0030] As Figures 1 to 4As shown in the figure, in an exemplary embodiment of the present utility model, the transmission switching mechanism 5 is composed of a fixed ring 51, a movable ring 52 and a limit ring 53. The fixed ring 51 and the limit ring 53 are both fixedly arranged in the housing 1 and support the driving shaft 4 to rotate through bearings. The movable ring 52 is fixedly arranged on the outer ring of the driving shaft 4. The lever on the movable ring 52 extends out of the housing 1 through the window on the housing 1 and is used to control the circumferential position accuracy of the driving shaft 4. A spring (not shown) is also sleeved on the driving shaft 4. One end of the spring abuts against the limit ring 53, and the other end of the spring abuts against the movable ring 52.

[0031] As Figures 1 to 4 shown, in an exemplary embodiment of the present utility model, a movable tooth surface 521 is provided on the end surface of the movable ring 52 facing the fixed ring 51, and a fixed tooth surface 511 is provided on the end surface of the fixed ring 51 facing the movable ring 52. The movable tooth surface 521 and the fixed tooth surface 511 are correspondingly and matchingly arranged.

[0032] As Figures 1 to 4 shown, in an exemplary embodiment of the present utility model, at least three support claws 522 arranged at equal angles are provided on the end surface of the movable ring 52 facing the fixed ring 51, and at least three slots 512 arranged at equal angles are provided on the end surface of the fixed ring 51 facing the movable ring 52. The support claws 522 and the slots 512 are correspondingly arranged one by one. When the support claws 522 are embedded in the slots 512, the movable tooth surface 521 is in contact with the fixed tooth surface 511. When the support claws 522 are arranged outside the slots 512, the movable tooth surface 521 is separated from the fixed tooth surface 511.

[0033] In the electric drill mode, under the action of the spring, the movable ring 52 is abutted against one side of the fixed ring 51, the support claws 522 are supported outside the slots 512, the movable tooth surface 521 and the fixed tooth surface 511 are arranged at intervals, and the driving shaft 4 rotates under the drive of the speed change gear set 3 to realize the electric drill function;

[0034] In the electric hammer mode, by rotating the movable ring 52 through the lever, the support claws 522 fall into the slots 512 under the action of the spring, the movable tooth surface 521 is in contact with the fixed tooth surface 511, the driving shaft 4 rotates under the drive of the speed change gear set 3, and the movable tooth surface 521 and the fixed tooth surface 511 transmit an axial acting force, thereby realizing the electric hammer function. And since the support claws 522 are correspondingly arranged with the slots 512 at this time, a space for the axial movement of the driving shaft 4 is formed. And under the action of the spring, the movable tooth surface 521 will always be close to the fixed tooth surface 511, but since the fixed tooth surface 511 is fixedly arranged and the movable tooth surface 521 is rotatably arranged, an axial acting force will be formed when the two are in contact.

[0035] Therefore, the present utility model has the following advantages:

[0036] A structure of an electric hammer and electric drill proposed by the present utility model controls the axial position accuracy of a drive shaft through a transmission switching mechanism, and then switches the driving mode of the drive shaft to achieve the functions of an electric drill or an electric hammer. It has the characteristics of simple structure, convenient control switching, and convenient maintenance, and is suitable for popularization and use.

[0037] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An electric hammer and electric drill structure, characterized in that: include: chassis; A motor, the motor being arranged at one end of the housing; A speed gear set, wherein the speed gear set is disposed in the housing, and an input end of the speed gear set is drivingly connected to an output end of the motor; A drive shaft, the drive shaft is arranged at the other end of the housing, the input end of the drive shaft is drivingly connected to the output end of the speed change gear set, and the output end of the drive shaft is used to connect a drill bit; A transmission switching mechanism, the transmission switching mechanism is disposed in the housing and is configured to be able to switch the axial position of the drive shaft to achieve the function of an electric drill or a hammer drill; The transmission switching mechanism is composed of a fixed ring, a movable ring and a limit ring. The fixed ring and the limit ring are both fixed in the casing and support the drive shaft to rotate through bearings. The movable ring is fixed on the outer ring of the drive shaft. The lever on the movable ring extends out of the casing through a window on the casing and is used to control the circumferential position of the drive shaft. A spring is also sleeved on the drive shaft, one end of the spring is against the limit ring, and the other end of the spring is against the movable ring.

2. The electric hammer and electric drill structure according to claim 1, characterized in that: A movable tooth surface is arranged on the end surface of the movable ring facing the fixed ring, and a fixed tooth surface is arranged on the end surface of the fixed ring facing the movable ring. The movable tooth surface and the fixed tooth surface are arranged correspondingly and matchingly.

3. The electric hammer and electric drill structure according to claim 2, characterized in that: At least three supporting claws arranged at equal angles are provided on the end surface of the movable ring facing the fixed ring, and at least three embedding grooves arranged at equal angles are provided on the end surface of the fixed ring facing the movable ring, and the supporting claws and the embedding grooves are arranged in a one-to-one correspondence; when the supporting claws are embedded in the embedding grooves, the movable tooth surface contacts the fixed tooth surface, and when the supporting claws are arranged outside the embedding grooves, the movable tooth surface is separated from the fixed tooth surface.

Images