Electric hammer air cylinder convenient to maintain

Abstract

The utility model discloses an electric hammer air cylinder convenient to maintain, which comprises a cylinder body, a detachable cylinder sleeve is arranged in the cylinder body, a plurality of limiting grooves are arranged on the inner wall of the cylinder body, limiting convex blocks with the same number as the limiting grooves are arranged on the outer wall of the cylinder sleeve, the limiting convex blocks are positioned in the limiting grooves, a fixed cover is arranged at one end of the cylinder body, and the fixed cover is arranged at the other end of the cylinder body. A plurality of mounting grooves are uniformly formed in the upper surface of the limiting convex block, one end, close to the fixed cover, of the limiting groove is an opening, a ball is rotationally arranged in each mounting groove, the upper surface of each ball abuts against the inner wall of the corresponding limiting groove, a spring is further arranged in each mounting groove, one end of each spring is connected with the corresponding ball, and the other end of each spring is connected with the corresponding ball. The air cylinder has the advantages that the cylinder sleeve can be conveniently taken out of the cylinder body, and then the air cylinder can be conveniently maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cylinder, especially a hammer cylinder convenient to maintain. BACKGROUND

[0002] The electric hammer is a kind of electric tool commonly used in construction, decoration, demolition and other work, which combines electric tool and hammering function, can efficiently complete the tasks such as punching and chiseling in a short time, and is different from traditional electric drill, the electric hammer has additional impact mechanism, and the impact mechanism is usually composed of piston, cylinder and impact head, when the electric hammer works, the piston in the cylinder is reciprocated to compress air in the cylinder by the transmission mechanism, so that the electric hammer starts to work, but the piston reciprocates in the cylinder for a long time, which causes the piston to wear the inner wall of the cylinder, if the entire impact mechanism is replaced to ensure that the electric hammer can be normally used, the replacement cost is higher, so in the prior art, the cylinder is provided with detachable cylinder sleeve, and the piston only wears the cylinder sleeve when reciprocating, so when the inner wall of the cylinder is worn, only the cylinder sleeve can be replaced, thereby reducing the maintenance cost.

[0003] For example, the high-strength electric hammer cylinder with publication number CN 217926561 U sets a detachable inner sleeve, which facilitates replacement of the inner sleeve after damage, reduces replacement cost, avoids the situation that the cylinder sleeve is scrapped as a whole due to wear, and prolongs the service life of other parts of the cylinder sleeve.

[0004] However, it still has some deficiencies, for example, due to the harsh environment (high temperature, high pressure and possible corrosion) in the cylinder, the cylinder sleeve may be stuck or rusted due to long-term use, gas pressure, temperature change and other factors, so it is difficult to take out the damaged cylinder sleeve from the cylinder. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem to provide a kind of electric hammer cylinder convenient to maintain that cylinder sleeve is taken out from cylinder.

[0006] The utility model discloses a technical scheme that the above technical problem is solved, which is an electric hammer cylinder convenient to maintain, comprising a cylinder body, a detachable cylinder sleeve is arranged in the cylinder body, a plurality of limiting grooves are formed on the inner wall of the cylinder body, the same number of limiting protrusions as the limiting grooves are arranged on the outer wall of the cylinder sleeve, when the cylinder sleeve is installed in the cylinder body, the limiting protrusions are located in the limiting grooves, one fixing cover for fixing the cylinder sleeve is detachably arranged at one end of the cylinder body, the limiting grooves are open at the end close to the fixing cover, a plurality of mounting grooves are uniformly formed on the upper surface of the limiting protrusions, one ball is rotatably arranged in each mounting groove, the upper surface of the ball abuts against the inner wall of the limiting groove, one spring is also arranged in each mounting groove, one end of the spring is connected with the ball, and the other end of the spring is connected with the mounting groove.

[0007] Further preferred embodiments of the utility model are as follows: the inner wall of the limiting groove at the end close to the fixing cover is round.

[0008] Further preferred embodiments of the utility model are as follows: a first insertion slot is formed in the inner wall of the cylinder body at the end away from the fixing cover, a first insertion block matched with the first insertion slot is arranged on the side wall of the cylinder sleeve at the end away from the end cover, and the first insertion block is inserted into the first insertion slot.

[0009] Further preferred embodiments of the utility model are as follows: the fixing cover is provided with a containing groove connected with the cylinder body at the side close to the cylinder body, the fixing cover is connected with the cylinder body through the containing groove, the cylinder body is located in the containing groove, a second insertion block in a ring shape is arranged in the containing groove, a second insertion slot matched with the second insertion block is formed on the side wall of the cylinder sleeve close to the fixing cover, the second insertion block is inserted into the second insertion slot, and the cylinder body and the fixing cover are connected through bolts.

[0010] Further preferred embodiments of the utility model are as follows: the first insertion block is integrally formed with the cylinder sleeve.

[0011] Further preferred embodiments of the utility model are as follows: the second insertion block is integrally formed with the fixing cover.

[0012] Further preferred embodiments of the utility model are as follows: a plurality of threaded holes are circumferentially formed on the outer wall of the cylinder body, the threaded holes are located in the containing groove when the cylinder body is connected with the containing groove, a plurality of through holes matched with the threaded holes are formed on the fixing cover at the top of the threaded holes, and the bolts are screwed into the threaded holes through the through holes.

[0013] Further preferred embodiments of the utility model are as follows: the second insertion block is round at the side close to the second insertion slot.

[0014] Compared with the prior art, the cylinder sleeve is convenient to take out from the cylinder body, and the cylinder is convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be described in further detail below in combination with the drawings and preferred embodiments, but the person skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be regarded as limiting the scope of the utility model. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described object conceptually and can contain exaggerated display, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 It is three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is the explosion drawing of the utility model;

[0018] Figure 3 It is isometric explosion drawing of the utility model;

[0019] Figure 4 It is structure schematic diagram of the utility model;

[0020] Figure 5 It is three-dimensional structure schematic diagram of cylinder body in the utility model;

[0021] Figure 6 It is three-dimensional structure schematic diagram of cylinder sleeve in the utility model;

[0022] Figure 7 It is three-dimensional structure schematic diagram of cylinder sleeve in the utility model;

[0023] Figure 8 It is structure schematic diagram of cylinder sleeve in the utility model;

[0024] Figure 9 It is three-dimensional structure schematic diagram of fixed cover in the utility model;

[0025] Figure 10 It is structure schematic diagram of fixed cover in the utility model;

[0026] Figure 11 It is Figure 8 It is the close-up of A in the utility model;

[0027] Figure 12 It is cross-sectional view of the utility model.

[0028] In the diagram: 1. Cylinder block; 2. Fixed cover; 3. Cylinder liner; 4. Limiting protrusion; 41. Mounting groove; 5. Ball bearing; 6. Threaded hole; 7. Second slot; 8. Through hole; 9. Limiting groove; 10. Second insert; 11. Receiving groove; 12. First insert; 13. First slot; 14. Spring. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0030] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0031] This embodiment mainly describes the structure of an easy-to-maintain electric hammer cylinder, as follows:

[0032] like Figures 1-12 As shown, an easy-to-maintain electric hammer cylinder includes a cylinder body 1 and a removable cylinder liner 3 in the cylinder body 1. This allows the cylinder liner 3 to be replaced only when the piston wears it, thus reducing replacement costs. To ensure the stability of the cylinder liner 3 in the cylinder body 1, multiple limiting grooves 9 are provided on the inner wall of the cylinder body 1, and the same number of limiting protrusions 4 as the limiting grooves 9 are provided on the outer wall of the cylinder liner 3. When the cylinder liner 3 is installed in the cylinder body 1, the limiting protrusions 4 are located in the limiting grooves 9. To ensure the firmness of the cylinder liner 3 in the cylinder body 1, a fixing cover 2 for fixing the cylinder liner 3 is detachably provided at one end of the cylinder body 1. In order for the limiting protrusions 4 to enter the limiting grooves 9 when the cylinder liner 3 is inserted into the cylinder body 1, the end of the limiting groove 9 near the fixing cover 2 is open, which facilitates the connection between the limiting groove 9 and the limiting protrusions 4.

[0033] Wherein, in order to be able to replace the cylinder liner 3 when the cylinder liner 3 is convenient to take out from the cylinder body 1, the upper surface of the limiting block 4 is uniformly provided with a plurality of mounting grooves 41, and a ball 5 is arranged in the mounting groove 41, and the upper surface of the ball 5 is in abutment with the inner wall of the limiting groove 9, so that when the cylinder liner 3 is taken out from the cylinder body 1, the ball 5 can roll in the mounting groove 41, and the rolling of the ball 5 reduces the friction between the limiting block 4 and the limiting groove 9, thereby facilitating the taking out of the cylinder liner 3 from the cylinder body 1, and further facilitating the maintenance of the cylinder, because the upper surface of the ball 5 needs to be in abutment with the inner wall of the limiting groove 9, so the upper surface of the ball 5 is higher than the upper surface of the limiting block 4, so that when the cylinder liner 3 is installed, the limiting groove 9 will limit the entry of the limiting block 4, so that the cylinder liner 3 cannot be installed in the cylinder body 1, and in order to avoid the problem, a spring 14 is also arranged in the mounting groove 41, and one end of the spring 14 is connected with the ball 5 and the other end is connected with the mounting groove 41, so that when the cylinder liner 3 is installed in the cylinder body 1, the ball 5 can be pressed into the mounting groove 41, so that the upper surface of the ball 5 is flush with the upper surface of the limiting block 4, so that the limiting groove 9 no longer limits the entry of the limiting block 4, and when the limiting block 4 enters the limiting groove 9, the spring 14 connected with the ball 5 can push the ball 5, so that the upper surface of the ball 5 is in abutment with the inner wall of the limiting groove 9, and the spring 14 can also prevent the ball 5 from being separated from the mounting groove 41.

[0034] Further, in order to facilitate the limiting block 4 to press the ball 5 into the mounting groove 41 when entering the limiting groove 9, the inner wall of the opening of the limiting groove 9 is provided in a rounded shape, so that when the limiting block 4 enters from the opening of the limiting groove 9, the rounded inner wall of the limiting groove 9 can extrude the ball 5, thereby facilitating the pressing of the ball 5 into the mounting groove 41, and also facilitating the installation of the cylinder liner 3 into the cylinder body 1.

[0035] In order to ensure that the cylinder body 1 limits the cylinder liner 3, a first insertion slot 13 is provided on the inner wall of the cylinder body 1 away from the fixed cover 2, and a first insertion block 12 matched with the first insertion slot 13 is arranged on the side wall of the cylinder liner 3 away from the end cover, so that when the cylinder liner 3 is inserted into the cylinder body 1, the first insertion block 12 is inserted with the first insertion slot 13, and in order to ensure the firmness of the connection between the first insertion block 12 and the cylinder liner 3, the first insertion block 12 is integrally formed with the cylinder liner 3.

[0036] In order to facilitate the connection of the fixed cover 2 and the cylinder body 1, a containing groove 11 connected with the cylinder body 1 is formed on the side of the fixed cover 2 close to the cylinder body 1, and the fixed cover 2 is connected with the cylinder body 1 through the containing groove 11, and when the fixed cover 2 is connected with the cylinder body 1, the cylinder body 1 is located in the containing groove 11, and in order to ensure the fixation of the fixed cover 2 to the cylinder sleeve 3, a second insertion block 10 arranged in a ring shape is arranged in the containing groove 11, and a second insertion groove 7 matched with the second insertion block 10 is formed on the side wall of the cylinder sleeve 3 close to the fixed cover 2, and when the fixed cover 2 is connected with the cylinder body 1, the second insertion block 10 located in the containing groove 11 can be inserted into the second insertion groove 7, and in order to facilitate the disassembly of the fixed cover 2, the cylinder body 1 and the fixed cover 2 are connected through bolts, and in order to ensure the firmness of the connection between the second insertion block 10 and the fixed cover 2, the second insertion block 10 is integrally formed with the fixed cover 2, and in order to facilitate the insertion of the second insertion block 10 into the second insertion groove 7, the second insertion block 10 is arranged in a round shape on the side close to the second insertion groove 7.

[0037] Further, in order to facilitate the installation of the bolts, a plurality of threaded holes 6 are formed on the outer wall of the cylinder body 1 in a circumferential direction, and when the cylinder body 1 is connected with the containing groove 11, the threaded holes 6 are located in the containing groove 11, then a plurality of through holes 8 matched with the threaded holes 6 are formed on the fixed cover 2 on the top of the threaded holes 6, so that when the bolts are installed, the bolts are inserted into the through holes 8 and then screwed with the threaded holes 6.

[0038] In the description of the utility model, it should be explained that the terms "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the utility model.

[0039] The utility model provides a kind of electric hammer cylinder of being convenient for maintenance is described in detail above, the principle and implementation mode of the utility model are described in this paper by applying specific examples, the above example is only for helping to understand the utility model and core idea.It should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

Claims

1. A maintenance-friendly electric hammer cylinder, comprising a cylinder body, a detachable cylinder sleeve disposed therein, a plurality of limiting grooves formed on the inner wall of the cylinder body, and limiting protrusions of the same number as the limiting grooves disposed on the outer wall of the cylinder sleeve, wherein when the cylinder sleeve is installed in the cylinder body, the limiting protrusions are located in the limiting grooves, and a fixing cap for fixing the cylinder sleeve is detachably disposed at one end of the cylinder body, wherein the limiting grooves are open at the end near the fixing cap, characterized in that: The upper surface of the limiting convex block is uniformly provided with a plurality of mounting grooves, a ball is rotatably arranged in each of the mounting grooves, the upper surface of the ball is in abutment with the inner wall of the limiting groove, and a spring is also arranged in each of the mounting grooves, one end of the spring is connected with the ball, and the other end of the spring is connected with the mounting groove.

2. A maintenance-friendly hammer cylinder according to claim 1, characterized in that: The inner wall of the limiting groove near the fixed cover is provided with a round corner.

3. The maintenance-friendly hammer cylinder according to claim 1, characterized in that: The first insertion slot is arranged on the inner wall of the cylinder body away from the end cover.

4. The maintenance-friendly hammer cylinder of claim 1, wherein: The fixed cover is provided with a containing groove connected with the cylinder body on the side close to the cylinder body, the cylinder body is connected with the fixed cover through the containing groove, the cylinder body is arranged in the containing groove, a second insertion block is arranged in the containing groove in a ring shape, the second insertion slot matched with the second insertion block is arranged on the side wall of the cylinder sleeve close to the fixed cover, the second insertion block is inserted into the second insertion slot, and the cylinder body and the fixed cover are connected through bolts.

5. The maintenance-friendly hammer air cylinder of claim 3, wherein: The first insertion block is integrally formed with the cylinder sleeve.

6. A maintenance-friendly hammer air cylinder according to claim 4, characterized in that: The second insertion block is integrally formed with the fixed cover.

7. A maintenance-friendly hammer air cylinder according to claim 4, characterized in that: A plurality of threaded holes are circumferentially arranged on the outer wall of the cylinder body, the threaded holes are arranged in the containing groove when the cylinder body is connected with the containing groove, a plurality of through holes matched with the threaded holes are arranged on the fixed cover at the top of the threaded holes, and the bolts are screwed into the threaded holes through the through holes.

8. The maintenance-friendly hammer air cylinder of claim 4, wherein: The second insertion block is provided with a round corner on the side close to the second insertion slot.

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