Module-detachable hydraulic door closer

Abstract

The utility model discloses a hydraulic door closer with a detachable module. The hydraulic door closer comprises a shell, a spring, a cam shaft, a piston and a connecting rod connected with the piston. An inner cavity is formed in the shell, and the shell sequentially comprises a first shell module, a second shell module and a third shell module in the forward direction of the length of the shell, wherein the first shell module, the second shell module and the third shell module are adjacent and detachably assembled and fixed. The piston, the connecting rod, the spring and the cam shaft are all located in the inner cavity, and the piston and the connecting rod can slide in the inner cavity together in the length direction of the shell. The connecting rod is sleeved with the spring, the spring is elastically connected between the piston and the shell in an abutting mode, the cam shaft is rotationally assembled on the shell and upwards extends out of the first shell module in a sealing fit mode, and the cam shaft is further in linkage with the connecting rod so that the cam shaft can be in linkage with the connecting rod and the piston to slide against the elastic force of the spring in the rotating process. The hydraulic door closer with the detachable module has the advantages of being detachable, maintainable and replaceable.

Description

Technical Field

[0001] The utility model relates to a door closer, in particular to a module detachable hydraulic door closer applied to a freezer. Background Art

[0002] As is well known, a floor spring is a hydraulic door closer. When in use, the camshaft in the floor spring is driven to rotate by the door during the opening process, and then the rotating camshaft drives the piston to slide close to the camshaft in the housing through a connecting rod.

[0003] Wherein, during the process of the piston sliding towards the camshaft, on the one hand, the piston compresses the spring in the housing to provide a restoring elastic force for the reset of the piston; on the other hand, the piston squeezes the hydraulic oil in the housing, causing the hydraulic oil to flow to the side of the piston facing away from the camshaft.

[0004] When the door loses the opening force, at this time, the spring pushes the piston to slide and reset in the direction away from the camshaft, and the sliding and resetting piston drives the camshaft and the door to rotate together through the connecting rod, so as to achieve the purpose of closing the door. During the closing process of the door, the hydraulic oil in the housing flows to the side of the piston facing the camshaft due to the extrusion of the piston, thereby realizing the buffered closing of the door.

[0005] Therefore, floor springs are widely used in occasions where buffered closing is required.

[0006] Currently, in the mechanical door-opening delay floor spring disclosed in Chinese Patent Application No. 201510483173.8, since its housing is of an integral structure, the components such as the piston and the spring in the housing cannot be disassembled, repaired, or replaced; at the same time, it only has two oil ports, namely the first oil port and the second oil port, and the distance accuracy requirements for the two are relatively high, resulting in an increase in manufacturing costs.

[0007] Therefore, there is an urgent need for a module detachable hydraulic door closer to overcome one or more of the above defects. Summary of the Utility Model

[0008] The purpose of the utility model is to provide a module detachable hydraulic door closer, which can be applied to a freezer, so as to facilitate the disassembly, repair, and replacement operations of the components in the housing by disassembling the housing itself.

[0009] To achieve the above object, the modular detachable hydraulic door closer of the present utility model includes a housing, a spring, a camshaft, a piston, and a connecting rod connected to the piston. The housing has an inner cavity, and the housing sequentially includes a first housing module, a second housing module, and a third housing module that are adjacent to each other and are detachably assembled and fixed along the positive direction of its length. The piston, the connecting rod, the spring, and the camshaft are all located in the inner cavity, and the piston and the connecting rod can also slide together in the inner cavity along the length direction of the housing. The spring is sleeved on the connecting rod and elastically abuts between the piston and the housing. The camshaft is rotatably assembled in the housing, and the camshaft is arranged in linkage with the connecting rod so that the camshaft drives the connecting rod and the piston to slide against the elastic force of the spring during rotation. The camshaft extends upward out of the first housing module in a sealed fit.

[0010] Compared with the prior art, since the housing sequentially includes a first housing module, a second housing module, and a third housing module that are adjacent to each other and are detachably assembled and fixed along the positive direction of its length, the housing itself is detachable. Therefore, by disassembling the housing itself, it is convenient for the disassembly, maintenance, and replacement operations of the housing and components such as the piston and spring inside it, as well as for later upgrading and transformation.

[0011] Preferably, the modular detachable hydraulic door closer of the present utility model further includes fixing screws. The first housing module and the third housing module are each provided with mounting through holes extending along the length direction of the housing, and the second housing module is provided with threaded holes matching the mounting through holes. The fixing screws penetrate through the mounting through holes and are threadedly connected to the threaded holes.

[0012] Preferably, the mounting through holes on the third housing module are arranged one above the other in the height direction of the housing, and the screw holes corresponding to the mounting through holes on the third housing module are also arranged one above the other.

[0013] Preferably, the inner cavity sequentially includes a first cavity and a second cavity along the positive direction of the length of the housing. The first cavity is located at the first housing module, and the second cavity is located at both the second housing module and the third housing module. The piston is slidably fitted with the second cavity, the connecting rod is placed in the second cavity and the first cavity, and the spring is located in the second cavity.

[0014] Preferably, the inner cavity further includes an intermediate cavity. The second cavity communicates with the first cavity through the intermediate cavity. The size of the intermediate cavity in the width direction of the housing is smaller than that of the second cavity and the first cavity. A step is formed at the intersection of the intermediate cavity and the second cavity, and the spring abuts against the step. The connecting rod is also located in the intermediate cavity.

[0015] Preferably, the middle cavity is located at both the first housing module and the second housing module, and the step is located on the second housing module.

[0016] Preferably, the second cavity penetrates through the end face of the third housing module facing away from the second housing module along the positive direction of the length of the housing to form an open mouth, and a plugging screw for plugging the open mouth is embedded on the third housing module.

[0017] Preferably, the modular detachable hydraulic door closer of the present invention further includes an oil passage, the oil passage includes a main passage extending in the second housing module and the third housing module and a first oil port, a second oil port and a third oil port communicating with the main passage, the first oil port, the second oil port and the third oil port are arranged in sequence along the positive direction of the length of the housing, the piston divides the second cavity into a first oil cavity and a second oil cavity, the first oil port communicates with the first oil cavity, the third oil port communicates with the second oil cavity, and the piston can selectively block or open the second oil port.

[0018] Preferably, a first adjusting screw for adjusting the first oil port is embedded on the second housing module, and a second adjusting screw for adjusting the third oil port is embedded on the third housing module.

[0019] Preferably, the first housing module includes a connecting screw, a fastening screw, and a bottom base shell, a sealing gasket and a top cover arranged in sequence from bottom to top; the connecting screw passes through both the bottom base shell and the top cover, and the connecting screw also fixes the bottom base shell and the top cover together, the sealing gasket is sandwiched between the bottom base shell and the top cover; the fastening screw passes through both the bottom base shell and the second housing module along the positive direction of the length of the housing, the fastening screw fixes the bottom base shell and the second housing module together, the fastening screw also protrudes into the first cavity, and the camshaft extends out from the top cover. Description of the Drawings

[0020] Figure 1 is a perspective view of the modular detachable hydraulic door closer of the present invention.

[0021] Figure 2 is Figure 1 the plan view of the modular detachable hydraulic door closer shown as viewed in the direction of arrow B.

[0022] Figure 3 is along Figure 2 the internal view cut along the D-D line in

[0023] Figure 4 is Figure 3 the perspective view of

[0024] Figure 5 is Figure 1 The three-dimensional exploded view of the modular detachable hydraulic door closer shown

[0025] Figure 6 is Figure 5 The further exploded three-dimensional exploded view

[0026] Figure 7 is Figure 6 The three-dimensional exploded view from another angle Specific embodiments

[0027] In order to describe in detail the technical content and structural features of the present invention, the following further description will be made in conjunction with the embodiments and with reference to the drawings

[0028] Please refer to Figure 1 、 Figure 3 and Figure 4 , the modular detachable hydraulic door closer 100 of the present invention includes a housing 10, a spring 20, a camshaft 30, a piston 40 and a connecting rod 50 connected to the piston 40. The housing 10 has an inner cavity 11. The housing 10 sequentially includes a first housing module 12, a second housing module 13 and a third housing module 14 that are detachably sealed and assembled and fixed along the positive direction of its length (i.e., the direction indicated by arrow A). That is, the first housing module 12 and the second housing module 13 are assembled and fixed, and the first housing module 12 and the second housing module 13 are in sealing cooperation to prevent oil leakage at the joint of the first housing module 12 and the second housing module 13. The first housing module 12 and the second housing module 13 can also be disassembled; the third housing module 14 and the second housing module 13 are assembled and fixed, and the third housing module 14 and the second housing module 13 are in sealing cooperation to prevent oil leakage at the joint of the third housing module 14 and the second housing module 13. The third housing module 14 and the second housing module 13 can also be disassembled

[0029] At the same time, the spring 20, the camshaft 30, the piston 40 and the connecting rod 50 are all located in the inner cavity 11, and the state is shown in Figure 4 shown. The piston 40 and the connecting rod 50 can also slide together in the inner cavity 11 along the length direction of the housing 10 (i.e., the direction indicated by arrow A and the opposite direction). Optionally, in Figure 3 and Figure 4 , as an example, the piston 40 is detachably assembled and connected to the end of the connecting rod 50 away from the camshaft 30 by means of a pin 41 to facilitate the disassembly and assembly operation between the piston 40 and the connecting rod 50; obviously, according to actual needs, the detachable assembly connection method between the piston 40 and the connecting rod 50 can also be other, so it is not limited to Figure 3 and Figure 4 shown

[0030] Furthermore, a spring 20 is sleeved on a connecting rod 50 and elastically abuts between a piston 40 and a housing 10 to provide a restoring elastic force for the restoration of the piston 40. A camshaft 30 is rotatably assembled in the housing 10 to meet the requirement of relative rotation of the camshaft 30 with respect to the housing 10; the camshaft 30 and the connecting rod 50 are arranged in a linked manner so that during the rotation of the camshaft 30, the connecting rod 50 and the piston 40 are linked to perform a sliding movement against the elastic force of the spring 20; the camshaft 30 also extends upward out of the first housing module 12 in a sealed fit to meet the requirement of assembling and connecting the camshaft 30 with an external door. It should be noted that the sealed fit at this time means that the position where the first housing module 12 is extended by the camshaft 30 is in sealed fit with the camshaft 30 to prevent oil leakage. In addition, since the specific linked structure between the camshaft 30 and the connecting rod 50 is already well-known in the art, specifically, reference can be made to the mechanical door-opening delay spring mentioned in the background art, so it will not be elaborated here. More specifically, as follows:

[0031] Combined with Figure 1 and Figures 4 to 7 , as an example, an implementation method for detachably assembling and fixing between the first housing module 12 and the second housing module 13 and between the second housing module 13 and the third housing module 14 is: the module detachable and assembled hydraulic door closer 100 of the present invention further includes fixing screws 60. The first housing module 12 and the third housing module 14 are each provided with mounting through holes 121 (141) extending along the length direction of the housing 10. The second housing module 13 is provided with threaded holes 131 matching the mounting through holes 121 (141). The fixing screws 60 penetrate through the mounting through holes 121 (141) and are threadedly connected to the threaded holes 131; the purpose of such a design is to further facilitate the disassembly and assembly operations between the first housing module 12 and the second housing module 13 and between the second housing module 13 and the third housing module 14. Specifically, combined with Figure 6 and Figure 7 , as an example, the mounting through holes 141 on the third housing module 14 are arranged one above the other in the height direction of the housing 10 (as indicated by the arrow C), and the screw holes 131 corresponding to the mounting through holes 141 on the third housing module 14 are also arranged one above the other; such a design enables the fixing screws 60 to fixedly connect the third housing module 14 and the second housing module 13 from two positions above and below respectively, thereby further improving the reliability of the fixation between the third housing module 14 and the second housing module 13 and better avoiding the position of the inner cavity 11. More specifically, in Figure 7 , as an example, in the third housing module 14, both the upper and lower mounting through holes 141 are two spaced apart along the width direction of the housing 10. Correspondingly, both the upper and lower screw holes 131 corresponding to the mounting through holes 141 on the third housing module 14 are two spaced apart along the width direction of the housing 10; the state is shown inFigure 7 as shown, but not limited to Figure 7 what is shown

[0032] As Figure 3 and Figure 4 shown, the inner cavity 11 sequentially includes a first cavity 111 and a second cavity 112 along the positive direction of the length of the housing 10 (i.e., the direction indicated by arrow A). The first cavity 111 is located at the first housing module 12, and the second cavity 112 is simultaneously located at the second housing module 13 and the third housing module 14. That is to say, the second cavity 112 is composed of a part located at the second housing module 13 and a part located at the third housing module 14. The piston 40 is slidably engaged with the second cavity 112. The connecting rod 50 is placed in the second cavity 112 and the first cavity 111. The spring 20 is located in the second cavity 112. Such a design facilitates the manufacturing and processing of the inner cavity 11 on the one hand, and facilitates the installation and removal of the spring 20 and the piston 40 on the other hand. Specifically, in Figure 3 and Figure 4 , as an example, the inner cavity 11 further includes an intermediate cavity 113. The second cavity 112 communicates with the first cavity 111 through the intermediate cavity 113. The dimension of the intermediate cavity 113 in the width direction of the housing 10 (see the direction indicated by arrow B) is smaller than that of the second cavity 112 and the first cavity 111, so that a step 132 is formed at the intersection of the second cavity 112 and the intermediate cavity 113. At this time, the connecting rod 50 is also located in the intermediate cavity 113, and the spring 20 abuts against the step 132. The state is as shown in Figure 4 . In addition, the second cavity 112 penetrates through the end face 142 of the third housing module 14 facing away from the second housing module 13 along the positive direction of the length of the housing 10 to form an open port 1121. A plugging screw 15 for plugging the open port 1121 is embedded on the third housing module 14, so as to facilitate the operator to inject oil into the inner cavity 11 or drain the oil in the inner cavity 11 by means of the plugging screw 15. More specifically, in Figure 3 and Figure 4 , as an example, the intermediate cavity 113 is simultaneously located at the first housing module 12 and the second housing module 13, so that the step 132 is located at the second housing module 13; obviously, according to actual needs, the intermediate cavity 113 can also be located at the first housing module 12, so it is not limited to Figure 3 and Figure 4 what is shown. In addition, for a more specific structure of the first housing module 12, see the following description:

[0033] Combined with Figures 1 to 7, as an example, the first housing module 12 includes a connecting screw 12a, a fastening screw 12b, and a bottom base case 12c, a gasket 12d, and a top cover 12e arranged in sequence from bottom to top. The connecting screw 12a passes through both the bottom base case 12c and the top cover 12e. The connecting screw 12a also fixes the bottom base case 12c and the top cover 12e together, so as to facilitate the assembly and disassembly operation between the top cover 12e and the bottom base case 12c by means of the connecting screw 12a. The gasket 12d is sandwiched between the bottom base case 12c and the top cover 12e to seal between the bottom base case 12c and the top cover 12e and prevent oil leakage. The fastening screw 12b passes through both the bottom base case 12c and the second housing module 13 along the positive direction of the length of the housing 10. The fastening screw 12b fixes the bottom base case 12c and the second housing module 13 together. The fastening screw 12b also protrudes into the first cavity 111, so that the fastening screw 12b is hidden inside the first housing module 12. Therefore, the fastening screw 12b can be disassembled only after the top cover 12e is disassembled. At this time, the camshaft 30 protrudes from the top cover 12e. Specifically, in Figure 5 and Figure 6 , as an example, at one end of the second housing module 13 facing the first housing module 12, an internal threaded hole 133 matching the fastening screw 12b is provided. The fastening screw 12b is threadedly connected to the internal threaded hole 133, so as to achieve the purpose of fixing the first housing module 12 and the second housing module 13 together by the fastening screw 12b.

[0034] As Figure 3 and Figure 4 shown, as an example, the module-disassemblable hydraulic door closer 100 of the present utility model further includes an oil passage 70. The oil passage 70 includes a main passage 71 extending in the second housing module 12 and the third housing module 13, and a first oil port 72, a second oil port 73, and a third oil port 74 communicating with the main passage 71. The first oil port 72, the second oil port 73, and the third oil port 74 are arranged in sequence along the positive direction of the length of the housing 10. The piston 40 divides the second cavity 112 into a first oil cavity 112a and a second oil cavity 112b. The first oil port 72 communicates with the first oil cavity 112a, and the third oil port 74 communicates with the second oil cavity 112b. The piston 40 can selectively block or open the second oil port 72, that is, the piston 40 will reach a position where it blocks or opens the second oil port 72 during the sliding process, realizing the function of the piston 40 blocking or opening the second oil port 72. Specifically, in Figure 3 and Figure 4Among them, as an example, a first adjusting screw 16 for adjusting the first oil port 72 is embedded on the second housing module 13, and a second adjusting screw 17 for adjusting the third oil port 74 is embedded on the third housing module 17. By means of the first adjusting screw 16 and the second adjusting screw 17, the modular detachable hydraulic door closer 100 of the present invention can flexibly adjust the oil pressure according to actual needs. Among them, by means of the opening of the first oil port 72, the second oil port 73 and the third oil port 74, the requirement for the distance precision between the oil ports is effectively reduced, thereby reducing the manufacturing cost.

[0035] Compared with the prior art, the housing 10 sequentially includes a first housing module 12, a second housing module 13 and a third housing module 14 that are adjacent and detachably assembled and fixed along the positive direction of its length, so that the housing 10 itself is detachable. Therefore, by disassembling the housing 10 itself, the disassembly, maintenance and replacement operations of the housing 10 and components such as the piston 40 and the spring 20 therein, as well as later upgrading and transformation are facilitated.

[0036] It should be noted that the length direction of the housing 10 is bidirectional, including a positive direction and a reverse direction. And the positive direction of the length of the housing 10 is unidirectional and belongs to one direction of the length direction of the housing 10. In addition, the structures of the camshaft 30, the piston 40 and the connecting rod 50 are already well known in the art, and reference can be made to the mechanical door-opening delay spring described in the background technology, so they will not be elaborated here.

[0037] The above-disclosed are only the preferred examples of the present invention, and the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention all fall within the scope covered by the present invention.

Claims

1. A modular detachable hydraulic door closer, comprising a housing, a spring, a camshaft, a piston and a connecting rod connected to the piston. The housing has an inner cavity, and the piston, the connecting rod, the spring and the camshaft are all located in the inner cavity. The piston and the connecting rod can also slide together in the inner cavity along the length direction of the housing. The spring is sleeved on the connecting rod and elastically abuts between the piston and the housing. The camshaft is rotatably assembled in the housing, and the camshaft is also arranged in linkage with the connecting rod so that during the rotation of the camshaft, the connecting rod and the piston are linked to slide against the elastic force of the spring. It is characterized in that, The housing sequentially includes, along the positive direction of its length, a first housing module, a second housing module, and a third housing module that are adjacent and detachably assembled and fixed, and the camshaft extends upward out of the first housing module in a sealed fit.

2. The detachable hydraulic door closer according to claim 1, characterized in that, It further includes fixing screws. The first housing module and the third housing module are each provided with mounting through holes extending along the length direction of the housing, and the second housing module is provided with threaded holes matching the mounting through holes. The fixing screws penetrate through the mounting through holes and are threadedly connected to the threaded holes.

3. The modular detachable hydraulic door closer according to claim 2, characterized in that, The mounting through holes on the third housing module are arranged one above the other in the height direction of the housing, and the screw holes corresponding to the mounting through holes on the third housing module are also arranged one above the other.

4. The modular detachable hydraulic door closer according to claim 2, wherein, The inner cavity sequentially includes a first cavity and a second cavity along the positive direction of the length of the housing. The first cavity is located at the first housing module, and the second cavity is located at both the second housing module and the third housing module; the piston is slidably fitted with the second cavity, the connecting rod is placed in the second cavity and the first cavity, and the spring is located in the second cavity.

5. The modular detachable hydraulic door closer according to claim 4, characterized in that, The inner cavity further includes an intermediate cavity. The second cavity communicates with the first cavity through the intermediate cavity. The size of the intermediate cavity in the width direction of the housing is smaller than that of the second cavity and the first cavity. A step is formed at the intersection of the intermediate cavity and the second cavity, the spring abuts against the step, and the connecting rod is also located in the intermediate cavity.

6. The modular detachable hydraulic door closer according to claim 5, characterized in that, The intermediate cavity is located at both the first housing module and the second housing module, and the step is located on the second housing module.

7. The modular detachable hydraulic door closer according to claim 4, characterized in that, The second cavity penetrates through the end face of the third housing module facing away from the second housing module along the positive direction of the length of the housing to form an open mouth, and a plugging screw for plugging the open mouth is embedded in the third housing module.

8. The modular detachable hydraulic door closer according to claim 4, characterized in that, It further includes an oil passage. The oil passage includes a main passage extending in the second housing module and the third housing module and a first oil port, a second oil port, and a third oil port communicating with the main passage. The first oil port, the second oil port, and the third oil port are sequentially arranged along the positive direction of the length of the housing. The piston divides the second cavity into a first oil cavity and a second oil cavity. The first oil port communicates with the first oil cavity, the third oil port communicates with the second oil cavity, and the piston can selectively block or open the second oil port.

9. The modular detachable hydraulic door closer according to claim 8, wherein, A first adjusting screw for adjusting the first oil port is embedded in the second housing module, and a second adjusting screw for adjusting the third oil port is embedded in the third housing module.

10. The modular detachable hydraulic door closer according to claim 4, characterized in that, The first housing module includes connecting screws, fastening screws, and a bottom base shell, a gasket, and a top cover arranged in sequence from bottom to top; the connecting screws are passed through both the bottom base shell and the top cover, and the connecting screws also fix the bottom base shell and the top cover together, and the gasket is sandwiched between the bottom base shell and the top cover; the fastening screws are passed through both the bottom base shell and the second housing module along the positive direction of the length of the housing, the fastening screws fix the bottom base shell and the second housing module together, and the fastening screws also protrude into the first cavity, and the camshaft extends out from the top cover.

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