A 90° position door closer

Abstract

The utility model discloses a 90 degree positioning door closer, solved the traditional door closer positioning stop door noise, positioning stop door stability is poor and other technical problems. The door closer includes body assembly, support arm subassembly and slide rail subassembly, and the body assembly includes host computer body, hydraulic piston, pin shaft subassembly, linkage assembly, reset spring, first check valve and second check valve etc, when the piston cavity fills in hydraulic oil, and the door opens to the stop door position, the hydraulic oil in the piston cavity cannot make the second check valve open, thereby make the door keep stop door, when the preset value's external force is applied to the door, the second check valve can open under the action of external force, triggers the door. The utility model utilizes hydraulic circuit control stop door, effectively improves the door closer positioning stop door noise, positioning stop door stability is poor and the problem of short service life.

Description

Technical Field

[0001] This utility model belongs to the field of door closer technology, specifically relating to a 90° positioning door closer. Background Technology

[0002] A door closer is a device installed on a door to automatically close it after it has been opened. Door closers are widely used on doors in various buildings, such as residences, office buildings, shopping malls, and hospitals, to ensure that the door closes automatically after use, thereby improving safety, energy efficiency, and convenience.

[0003] Door closers in related technologies typically include a body assembly, a slide rail assembly, and a support arm. The body assembly is installed inside the door, the slide rail assembly is installed and fastened inside the door frame, and one end of the support arm is connected to the toothed shaft tenon on the body assembly, while the other end is fastened to the guide block in the slide rail assembly.

[0004] Door closers in related technologies often adopt sliding rail snap-lock door stop structure or sliding rail leaf spring door stop structure. That is, after the door is opened, the door remains open under the action of the door stop structure. When the door is pushed manually, the limit is released and the door closes automatically.

[0005] However, the sliding rail snap-on door closer structure has the problem of being noisy, while the sliding rail leaf spring door closer structure has the risk of leaf spring breakage, which affects the stability and service life of the door closer and needs to be improved. Utility Model Content

[0006] In order to solve all or some of the above problems, the purpose of this utility model is to provide a 90° positioning door closer that can reduce noise and improve stability and service life.

[0007] This utility model provides a 90° positioning door closer, including a body assembly, a support arm assembly, and a slide rail assembly. The body assembly includes: The main body includes a main housing and a left end cover and a right end cover that are sealed to the main housing, and a piston hole is formed inside the main housing; A hydraulic piston is slidably connected within the piston bore, dividing the piston bore into a piston chamber and a spring chamber. The piston chamber is located on the left side of the hydraulic piston, and the spring chamber is located on the right side of the hydraulic piston. The hydraulic piston has a reduced diameter. The right end of the hydraulic piston is in a sealed sliding fit with the piston bore, and the left end is in a sealed sliding fit with the piston bore through a seal. A strip-shaped hole is provided at the reduced diameter position of the hydraulic piston. A pin assembly is rotatably connected to the main housing, and the pin assembly passes through the strip hole; A linkage component is disposed on the hydraulic piston and the pin assembly, and is used to enable the pin assembly and the hydraulic piston to move in linkage. A reset spring is disposed within the spring cavity and is used to push the hydraulic piston to move to the left; A connecting hole is provided at the right end of the hydraulic piston and connects the strip-shaped hole and the spring cavity; The first oil hole is located at the left end of the hydraulic piston and is connected to the strip hole; A first mounting hole is provided at the left end of the hydraulic piston and connects the first oil hole and the piston chamber; A first check valve is disposed in the first mounting hole and is used to restrict hydraulic oil to enter the piston chamber only through the strip hole; The second oil hole is located at the left end of the hydraulic piston and the right side of the seal, and connects the second mounting hole and the gap between the hydraulic piston and the piston hole on the right side of the seal. The second mounting hole is located at the left end of the hydraulic piston and connects the piston chamber with the second oil hole; The second check valve is disposed in the second mounting hole and is used to restrict the hydraulic oil in the piston chamber that is below the set oil pressure from entering the second check valve through the piston chamber and entering the gap, strip hole and spring cavity on the right side of the seal at the left end of the hydraulic piston and the piston hole through the second oil hole. When the piston chamber is filled with hydraulic oil and the door is opened to the stop position, the hydraulic oil in the piston chamber cannot open the second check valve, thus keeping the door stopped. When a preset external force is applied to the door, the oil pressure of the hydraulic oil in the piston chamber rises to a certain value, causing the second check valve to open under the action of the increased oil pressure hydraulic oil.

[0008] Optionally, the body assembly further includes a speed regulating component for controlling the closing speed, the speed regulating component comprising: A process hole is provided at the left end of the main housing; A sealing ball is used to seal the port of the process hole; The first speed regulating hole is provided on the main housing and connects to the process hole and the piston hole; The second speed regulating hole is disposed on the main housing and connects the process hole and the piston hole, and the second speed regulating hole is located to the right of the first speed regulating hole; A through hole is provided on the main housing and connects the process hole and the piston hole, and the through hole is located between the first speed regulating hole and the second speed regulating hole; The first speed control valve is movably connected to the main housing and is used to control the opening of the first speed control port; The second speed control valve is movably connected to the main housing and is used to control the opening degree of the second speed control port; Specifically, when the door is opened to the stop position, the seal closes the second speed regulating hole; when the door is closed to the point where the closing speed controlled by the second speed regulating valve switches to the point controlled by the first speed regulating valve, the seal closes the through hole.

[0009] Optionally, the speed regulating component further includes: The third speed regulating hole is provided on the main housing and connects the process hole and the piston hole, and the third speed regulating hole is located to the right of the second speed regulating hole; The third speed control valve is movably connected to the main housing and is used to control the opening degree of the third speed control port.

[0010] Optionally, the speed control component is provided in two sets, which are symmetrically arranged along the axis of the main housing, and one set of the speed control component is used when the door opens and closes to the left, while the other set of the speed control component is used when the door opens and closes to the right.

[0011] Optionally, the sealing element includes a piston ring, a sealing ring groove, a sealing O-ring, and a piston oil seal. The piston ring is integrally formed and disposed on the left end of the hydraulic piston, and the piston ring slides with a clearance to the inner wall of the main housing. The sealing ring groove is disposed on the piston ring, and the sealing O-ring and the piston oil seal are respectively embedded in the sealing ring groove. The piston oil seal is located outside the sealing O-ring and is used to seal the through hole or the second speed regulating hole.

[0012] Optionally, the body assembly further includes a connecting plate, both ends of which are connected to the main housing via locking screws, and both ends of the connecting plate are respectively provided with limiting screws for connection with the door panel.

[0013] Optionally, the main housing has two symmetrically arranged mounting holes, and the pin assembly includes: Two shaft caps are provided, each sealed and connected to the corresponding mounting hole. Rotate the pin so that the middle part passes through the strip hole and the two ends pass through the corresponding shaft caps; The rotating pin is rotatably connected to the two shaft caps via bearing assemblies.

[0014] Optionally, the linkage assembly includes a linkage rack and a linkage gear. The linkage rack is disposed on the inner wall of the strip-shaped hole, and the linkage gear is disposed on the pin assembly, and the linkage gear meshes with the linkage rack.

[0015] Optionally, the support arm assembly includes a movable support arm and a guide block. One end of the movable support arm is connected to the pin assembly, and the other end is rotatably connected to the guide block via a locking screw. The guide block is slidably connected to the slide rail assembly.

[0016] Optionally, the slide rail assembly includes a guide slide rail, a blocking block, and a plurality of connecting screws. The blocking block is disposed within the guide slide rail, and when the door is opened to the stop position, the guide block abuts against the blocking block. The plurality of connecting screws are respectively disposed on the guide slide rail and are used to connect with the door frame.

[0017] As can be seen from the above technical solution, the 90° positioning door closer provided by this utility model has the following advantages: This door closer uses a hydraulic circuit to control the door stopping. Compared with the traditional sliding rail snap-lock door stopping structure, this door closer is quieter. Compared with the traditional sliding rail leaf spring door stopping structure, this door closer can effectively improve the stability of use and extend the service life.

[0018] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0020] Figure 1 This is a schematic diagram of the overall structure of the door closer in an embodiment of this utility model; Figure 2 This is an exploded view of the main body component in an embodiment of this utility model; Figure 3 This is a cross-sectional view of the main body component in an embodiment of this utility model; Figure 4 This is a cross-sectional view of the main body component in an embodiment of this utility model; Figure 5 for Figure 4 Enlarged view of region A in the middle; Figure 6 This is a cross-sectional view of the hydraulic piston in an embodiment of this utility model; Figure 7 This is an exploded view of the door closer in an embodiment of this utility model; Figure 8 This is a cross-sectional view of the door closer when the door is opened to 90° in an embodiment of this utility model; Figure 9 This is a cross-sectional view of the door closer when the door is closed to 12° in an embodiment of this utility model; Figure 10This is a cross-sectional view of the door closer when the door is closed to 0° in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures: 1. Main body assembly; 101. Main body; 1011. Main housing; 1012. Left end cover; 1013. Right end cover; 1014. End cover oil seal; 1015. Piston bore; 102. Hydraulic piston; 103. Piston chamber; 104. Spring chamber; 105. Seals; 1051. Piston ring; 1052. Sealing ring groove; 1053. Sealing O-ring; 1054. Piston oil seal; 106. Strip hole; 107. Pin assembly; 1071. Rotary... 1072. Moving pin; 1073. Shaft cover; 1074. Bearing assembly; 1075. Oil seal; 108. Linkage assembly; 1081. Linkage rack; 1082. Linkage gear; 109. Return spring; 110. Connecting hole; 111. First oil hole; 112. First mounting hole; 113. First check valve; 1131. First valve body; 1132. First valve seat; 1133. Filter screen; 1134. First spring; 1135. First valve ball; 1 136. First sealing surface; 114. Second oil hole; 115. Second mounting hole; 116. Second check valve; 1161. Second valve body; 1162. Second valve ball; 1163. Second spring; 1164. Valve body oil seal; 1165. Second sealing surface; 117. Speed ​​regulating assembly; 1171. Process hole; 1172. Sealing ball; 1173. First speed regulating hole; 1174. Second speed regulating hole; 1175. Third speed regulating hole; 1176. Through hole 1177, First speed control valve; 1178, Second speed control valve; 1179, Third speed control valve; 1180, Speed ​​control valve oil seal; 118, Connecting plate; 119, Locking screw; 120, Limiting screw; 121, Mounting hole; 2. Support arm assembly; 21, Movable support arm; 22, Guide block; 23, Screw washer assembly; 24, Locking screw; 3. Slide rail assembly; 31, Guide slide rail; 32, Blocking block; 33, Connecting screw; 34, Set stud. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be arbitrarily combined with each other.

[0023] like Figures 1-10 The present invention is illustrated in an embodiment of the present invention. This embodiment discloses a 90° positioning door closer, including a body assembly 1, a support arm assembly 2, and a slide rail assembly 3. One end of the support arm assembly 2 is connected to the slide rail assembly 3, and the other end is connected to the body assembly 1. The body assembly 1 is used to be installed on the door panel, and the slide rail assembly 3 is used to be installed on the door frame.

[0024] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the main body assembly 1 includes a rectangular main body 101. The main body 101 includes a main body housing 1011, a left end cover 1012 and a right end cover 1013, and the interior of the main body housing 1011 has a piston hole 1015 arranged along its length direction.

[0025] The left end cover 1012 and the right end cover 1013 are threaded to the ends of the main housing 1011, and the left end cover 1012 and the right end cover 1013 respectively seal the corresponding ports of the piston hole 1015. At the same time, the left end cover 1012 and the right end cover 1013 are respectively provided with end cover oil seals 1014 to ensure the sealing effect between the left end cover 1012, the right end cover 1013 and the main housing 1011.

[0026] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the main body assembly 1 also includes a hydraulic piston 102 slidably connected in the piston bore 1015. The hydraulic piston 102 divides the interior of the piston bore 1015 into a piston chamber 103 and a spring chamber 104, with the piston chamber 103 located on the left side of the hydraulic piston 102 and the spring chamber 104 located on the right side of the hydraulic piston 102.

[0027] The hydraulic piston 102 has a reduced diameter. The right end of the hydraulic piston 102 is in a sealed sliding fit with the inner wall of the piston bore 1015, while the left end of the hydraulic piston 102 has a gap with the inner wall of the piston bore 1015. The left end of the hydraulic piston 102 is also in a sealed sliding fit with the piston bore 1015 through a seal 105. A strip-shaped hole 106 is provided at the reduced diameter position of the hydraulic piston 102, and the strip-shaped hole 106 is arranged along the axial direction of the hydraulic piston 102.

[0028] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the main body assembly 1 also includes a pin assembly 107 and a linkage assembly 108. The pin assembly 107 passes through the main housing 1011 and is rotatably connected to the main housing 1011, and the pin assembly 107 passes through the strip hole 106. The linkage assembly 108 is disposed on the hydraulic piston 102 and the pin assembly 107, and is used to make the pin assembly 107 move in linkage with the hydraulic piston 102.

[0029] In this application, "linkage motion" means that when the pin assembly 107 rotates, the hydraulic piston 102 slides synchronously under the action of the linkage assembly 108; similarly, when the hydraulic piston 102 slides, the pin assembly 107 rotates synchronously under the action of the linkage assembly 108.

[0030] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the main body assembly 1 also includes a reset spring 109 disposed in the spring cavity 104. The left end of the reset spring 109 abuts against the right end of the hydraulic piston 102, and the right end of the reset spring 109 abuts against the right end cover 1013. The reset spring 109 is used to push the hydraulic piston 102 to move to the left.

[0031] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the main body assembly 1 also includes a connecting hole 110 disposed at the right end of the hydraulic piston 102, and the connecting hole 110 connects the strip hole 106 and the spring cavity 104.

[0032] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the main body assembly 1 also includes a first oil hole 111, a first mounting hole 112, and a first check valve 113. The first oil hole 111 is located at the left end of the hydraulic piston 102 and communicates with the first mounting hole 112 and the slotted hole 106. The first mounting hole 112 is located at the left end of the hydraulic piston 102 and communicates with the first oil hole 111 and the piston chamber 103. The first check valve 113 is sealed within the first mounting hole 112 and restricts hydraulic oil from entering the piston chamber 103 only through the slotted hole 106.

[0033] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the main body assembly 1 also includes a second oil hole 114, a second mounting hole 115, and a second check valve 116. The second oil hole 114 is located at the left end of the hydraulic piston 102. One port of the second oil hole 114 is connected to the second mounting hole 115, and the other port is located on the side wall of the left end of the hydraulic piston 102. The ports of the second oil hole 114 located on the side wall of the hydraulic piston 102 are distributed on the right side of the seal 105, so that the second oil hole 114 and the second mounting hole 115 communicate with the gap on the right side of the seal 105 between the hydraulic piston 102 and the piston hole 1015.

[0034] The second mounting hole 115 is located at the left end of the hydraulic piston 102, and the second mounting hole 115 connects the piston chamber 103 and the second oil hole 114. The second check valve 116 is sealed inside the second mounting hole 115, and when the valve is opened to 90°, the second check valve 116 restricts hydraulic oil from entering the left end of the hydraulic piston 102 from the piston chamber 103 through the gap between the piston hole 1015 and the right side of the seal 105, which connects to the strip hole 106.

[0035] In this embodiment, when the door is opened, the hydraulic oil in the spring chamber 104 enters the piston chamber 103 through the first check valve 113. When the door is opened to the stop position, the hydraulic oil in the piston chamber 103 cannot open the second check valve 116, thus keeping the door stopped. When a preset external force is applied to the door, the hydraulic oil in the piston chamber 103 with increased oil pressure opens the second check valve 116, meaning the second check valve 116 can be opened under the action of external force.

[0036] In one embodiment, such as Figure 5 As shown, the first one-way valve 113 includes a first valve body 1131, a first valve seat 1132, and a filter screen 1133 disposed within a first mounting hole 112. The first valve seat 1132 presses the filter screen 1133 against the bottom of the first mounting hole 112. The first valve seat 1132 is interference-fitted into the first mounting hole 112, and the outer circumference of the first valve seat 1132 forms an effective seal with the first mounting hole 112. The first valve body 1131 is threadedly connected to the first mounting hole 112, and the first valve body 1131 abuts against the first valve seat 1132.

[0037] The first one-way valve 113 includes a first spring 1134 and a first valve ball 1135. The first spring 1134 is disposed in the first valve body 1131, and the first valve ball 1135 is disposed in the first valve seat 1132. The first spring 1134 is used to push the first valve ball 1135 toward the first valve seat 1132. At the same time, the first valve seat 1132 is provided with a first sealing surface 1136 that can seal with the first valve ball 1135.

[0038] When hydraulic oil flows into the piston chamber 103 through the first oil hole 111, the hydraulic oil pushes the first valve ball 1135 to the left and compresses the first spring 1134. At this time, the first valve ball 1135 separates from the first sealing surface 1136, allowing hydraulic oil to enter the piston chamber 103 through the first oil hole 111, the first valve seat 1132, and the first valve body 1131. When the door is opened to the stop position, the return spring 109 applies a force to the hydraulic piston 102 to the left. At this time, the first valve ball 1135, under the combined action of the first spring 1134 and the hydraulic oil, tightly abuts against the first sealing surface 1136, thereby closing the first check valve 113.

[0039] In one embodiment, such as Figure 5 As shown, the second check valve 116 includes a second valve body 1161, a second valve ball 1162, a second spring 1163, and a valve body oil seal 1164. The second valve body 1161 is threadedly connected to the second mounting hole 115, and the valve body oil seal 1164 is disposed on the second valve body 1161 to achieve effective sealing between the second valve body 1161 and the second mounting hole 115.

[0040] The second valve ball 1162 and the second spring 1163 are respectively disposed inside the second valve body 1161. The second sealing surface 1165 is provided at the left end of the inner wall of the second valve body 1161. The second spring 1163 is used to push the second valve ball 1162 to move to the left and make the second valve ball 1162 abut against the second sealing surface 1165 to seal.

[0041] When an external force is applied to the door, the hydraulic oil in the piston chamber 103 pushes open the second valve ball 1162 and compresses the second spring 1163. At this time, the hydraulic oil in the piston chamber 103 enters the gap between the hydraulic piston 102 and the piston hole 1015 through the second valve body 1161 and the second oil hole 114. When the external force is removed, the second valve ball 1162 presses against the second sealing surface 1165 under the action of the second spring 1163, so that the second check valve 116 is closed.

[0042] In this embodiment, the diameter of the oil inlet hole on the first valve body 1131 is larger than the diameter of the oil inlet hole on the second valve body 1161. That is, the oil intake of the second valve body 1161 is smaller, and the second one-way valve 116 needs a greater force to open, so as to ensure that the door can be stably kept in the stopped state.

[0043] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the main body assembly 1 also includes two sets of speed control components 117. These two sets of speed control components 117 are symmetrically arranged along the axis of the main body housing 1011, and are used to control the closing speed. One set of speed control components 117 is used when the door opens and closes to the left, and the other set is used when the door opens and closes to the right. This design allows the door closer to support both left-opening and right-opening door operation, allowing operators to select which set of speed control components 117 to use based on the actual situation.

[0044] In one embodiment, such as Figure 2 , Figure 3 , Figure 4As shown, each speed control assembly 117 includes a process hole 1171, a blocking ball 1172, a first speed control hole 1173, a second speed control hole 1174, a third speed control hole 1175, a through hole 1176, a first speed control valve 1177, a second speed control valve 1178, and a third speed control valve 1179. The process hole 1171 is located at the left end of the main housing 1011, and the blocking ball 1172 is interference-fitted with the process hole 1171 and blocks the port of the process hole 1171.

[0045] The first speed regulating hole 1173, the second speed regulating hole 1174, and the third speed regulating hole 1175 are respectively disposed on the main housing 1011. The first speed regulating hole 1173, the second speed regulating hole 1174, and the third speed regulating hole 1175 respectively connect the process hole 1171 and the piston hole 1015, and the first speed regulating hole 1173, the second speed regulating hole 1174, and the third speed regulating hole 1175 are arranged sequentially from left to right.

[0046] A through hole 1176 is provided on the main housing 1011, connecting the process hole 1171 and the piston hole 1015, and is located between the first speed regulating hole 1173 and the second speed regulating hole 1174. Simultaneously, when the door is opened to the stop position, the seal 105 closes the second speed regulating hole 1174; when the door is closed to a preset angle, the seal 105 closes the through hole 1176. In this embodiment, the preset angle is 12°.

[0047] The first speed control valve 1177, the second speed control valve 1178, and the third speed control valve 1179 are threadedly connected to the main housing 1011. The first speed control valve 1177 controls the opening of the first speed control orifice 1173, the second speed control valve 1178 controls the opening of the second speed control orifice 1174, and the third speed control valve 1179 controls the opening of the third speed control orifice 1175. Each of the first speed control valve 1177, the second speed control valve 1178, and the third speed control valve 1179 is equipped with a speed control valve oil seal 1180 to ensure effective sealing between the first speed control valve 1177, the second speed control valve 1178, and the third speed control valve 1179 and the main housing 1011.

[0048] In one embodiment, such as Figure 3 , Figure 6As shown, the seal 105 includes a piston ring 1051, a sealing ring groove 1052, a sealing O-ring 1053, and a piston oil seal 1054. The piston ring 1051 is integrally formed and disposed on the left end of the hydraulic piston 102, and the piston ring 1051 slides with a clearance fit to the inner wall of the main housing 1011. The sealing ring groove 1052 is disposed on the piston ring 1051. The sealing O-ring 1053 and the piston oil seal 1054 are respectively embedded in the sealing ring groove 1052, and the piston oil seal 1054 is located outside the sealing O-ring 1053, and is used to close the through hole 1176 or the second speed regulating hole 1174, and slides with the hydraulic piston 102 in the piston hole 1015 for sealing.

[0049] In one embodiment, such as Figure 2 , Figure 7 As shown, the main body assembly 1 also includes a connecting plate 118. Both ends of the connecting plate 118 are connected to the main body housing 1011 by locking screws 119, and both ends of the connecting plate 118 are respectively provided with limiting screws 120 for connecting with the door panel.

[0050] In one embodiment, such as Figure 2 , Figure 3 As shown, the main housing 1011 has two symmetrically arranged mounting holes 121. The pin assembly 107 includes a rotating pin 1071 and two shaft covers 1072. The two shaft covers 1072 are respectively sealed and connected to the corresponding mounting holes 121. The middle part of the rotating pin 1071 passes through the strip hole 106, and both ends pass through the corresponding shaft covers 1072. The rotating pin 1071 and the two shaft covers 1072 are rotatably connected by bearing assemblies 1073. At the same time, the two shaft covers 1072 are respectively provided with sealing oil seals 1074 to ensure the sealing effect between the shaft cover 1072 and the main housing 1011.

[0051] In this embodiment, the bearing assembly 1073 includes an oil seal, a bearing, and a gasket arranged sequentially from top to bottom. The oil seal seals the rotating pin 1071 and the shaft cover 1072, and the gasket prevents the gear from rubbing against the bearing when it rotates, thus providing good protection.

[0052] In one embodiment, such as Figure 2 , Figure 4 As shown, the linkage assembly 108 includes a linkage rack 1081 and a linkage gear 1082. The linkage rack 1081 is disposed on the inner wall of the strip hole 106, and the linkage gear 1082 is disposed on the rotating pin 1071, and the linkage gear 1082 meshes with the linkage rack 1081.

[0053] In one embodiment, such as Figure 1 , Figure 7As shown, the support arm assembly 2 includes a movable support arm 21 and a guide block 22. A square hole at one end of the movable support arm 21 fits onto the square tenon of the rotating pin 1071, and the movable support arm 21 is fixedly connected to the rotating pin 1071 via a screw washer assembly 23. The other end of the movable support arm 21 is connected to the guide block 22 via a locking screw 24, and the movable support arm 21 and the locking screw 24 are in clearance fit, allowing the movable support arm 21 to rotate around the locking screw 24. Simultaneously, the guide block 22 is slidably connected to the slide rail assembly 3.

[0054] In one embodiment, such as Figure 1 , Figure 7 As shown, the slide rail assembly 3 includes a guide slide rail 31, a blocking block 32, and multiple connecting screws 33. The blocking block 32 is limited and connected to the guide slide rail 31 by a set screw 34, and when the door is opened to the stop position, the guide block 22 abuts against the blocking block 32. The multiple connecting screws 33 are respectively disposed on the guide slide rail 31 and are used to connect with the door frame, thereby realizing the fixed connection between the slide rail assembly 3 and the door frame.

[0055] In this embodiment, the angle from the door opening to the stopped position is 90°.

[0056] like Figure 8 , Figure 9 , Figure 10 As shown, the door closer in this embodiment has two usage modes, which are described in detail below: 1. The door needs to be stopped when it is opened. According to the opening and closing direction of the door, the first speed regulating valve 1177 and the second speed regulating valve 1178 of one set of speed regulating components 117 are opened, and the third speed regulating valve 1179 is locked. When the door is opened, the rotating pin 1071 drives the linkage gear 1082 to rotate. The hydraulic piston 102 moves to the right under the action of the linkage rack 1081 and the linkage gear 1082, and squeezes the hydraulic oil in the spring cavity 104. At this time, the first one-way valve 113 is opened, and the hydraulic oil in the spring cavity 104 enters the piston cavity 103 through the connecting hole 110, the strip hole 106, the first oil hole 111, and the first one-way valve 113. When the door is opened to 90°, the guide block 22 abuts against the blocking block 32, and the piston oil seal 1054 closes the second speed regulating hole 1174. When the door is opened, the first valve ball 1135 presses against the first sealing surface 1136 under the action of the first spring 1134, which means the first one-way valve 113 is closed. At this time, the return spring 109 cannot move the hydraulic piston 102 to return to its original position, thus stopping the door.

[0057] When the door is closed by hand, the rotating pin 1071 drives the linkage gear 1082 to rotate. Under the action of the linkage rack 1081 and the linkage gear 1082, the hydraulic piston 102 moves to the left and squeezes the hydraulic oil in the piston chamber 103. At this time, the hydraulic oil in the piston chamber 103 pushes open the second valve ball 1162, that is, the second one-way valve 116 opens. The hydraulic oil in the piston chamber 103 enters the gap between the hydraulic piston 102 and the piston hole 1015 through the second one-way valve 116 and the second oil hole 114, and then enters the reduced diameter position of the hydraulic piston 102, and then enters the spring chamber 104 through the tightening strip hole 106 and the connecting hole.

[0058] As the hydraulic piston 102 moves to the left, when the piston oil seal 1054 does not completely seal the second speed regulating hole 1174 (i.e., the piston oil seal 1054 and the second speed regulating hole 1174 are misaligned), the hydraulic oil in the piston chamber 103 enters the gap between the hydraulic piston 102 and the piston hole 1015 through the guide hole 1176, the process hole 1171, and the second speed regulating hole 1174, then enters the reduced diameter position of the hydraulic piston 102, and then enters the spring chamber 104 through the tightening strip hole 106 and the connecting hole. At this time, under the action of the return spring 109, the door closes automatically. Since the second speed regulating valve 1178 controls the opening of the second speed regulating hole 1174, that is, when the door closes from 90° to 12°, the second speed regulating valve 1178 adjusts the closing speed. It should be noted that when the second speed regulating hole 1174 is connected, the oil pressure in the piston chamber 103 drops, the second spring 1163 pushes the second valve ball 1162 to move, and the second valve ball 1162 abuts against the second sealing surface 1165, that is, the second one-way valve 116 is closed.

[0059] When the door is closed to 12°, the piston oil seal 1054 aligns with and seals the through hole 1176. Hydraulic oil in the piston chamber 103 enters the spring chamber 104 through the first speed regulating hole 1173, process hole 1171, second speed regulating hole 1174, the gap between the hydraulic piston 102 and piston hole 1015, the strip hole 106, and the connecting hole 110. As the piston oil seal 1054 shifts to the left and misaligns with the through hole 1176, the hydraulic oil in the piston chamber 103 enters the spring chamber 104 through the first speed regulating hole 1173, process hole 1171, through hole 1176, the gap between the hydraulic piston 102 and piston hole 1015, the strip hole 106, and the connecting hole 110. Since the first speed regulating valve 1177 controls the opening of the first speed regulating hole 1173, that is, when the door closes from 12° to 0°, the first speed regulating valve 1177 adjusts the closing speed.

[0060] Second: No need to stop the door when it opens. According to the opening and closing direction of the door, the first speed regulating valve 1177 and the third speed regulating valve 1179 of one set of speed regulating components 117 are opened, and the second speed regulating valve 1178 is locked. When the door is opened, the rotating pin 1071 drives the linkage gear 1082 to rotate. The hydraulic piston 102 moves to the right under the action of the linkage rack 1081 and the linkage gear 1082, and squeezes the hydraulic oil in the spring cavity 104. At this time, the first one-way valve 113 is opened, and the hydraulic oil in the spring cavity 104 enters the piston cavity 103 through the connecting hole 110, the strip hole 106, and the first oil hole 111. When the door is opened to 90°, the guide block 22 abuts against the blocking block 32, and the piston oil seal 1054 cannot close the third speed regulating hole 1175.

[0061] When the door is released, the return spring 109 pushes the hydraulic piston 102 to the left, the first one-way valve 113 closes, and the hydraulic oil in the piston chamber 103 enters the spring chamber 104 through the guide hole 1176, process hole 1171, third speed regulating hole 1175, strip hole 106, and connecting hole 110, causing the door to close automatically. Since the third speed regulating valve 1179 controls the opening degree of the third speed regulating hole 1175, that is, when the door closes from 90° to 12°, the third speed regulating valve 1179 adjusts the closing speed.

[0062] When the door is closed to 12°, the piston oil seal 1054 aligns with and seals the through hole 1176. Hydraulic oil in the piston chamber 103 enters the spring chamber 104 through the first speed regulating hole 1173, process hole 1171, third speed regulating hole 1175, strip hole 106, and connecting hole 110. As the piston oil seal 1054 shifts to the left and misaligns with the through hole 1176, the hydraulic oil in the piston chamber 103 enters the spring chamber 104 through the first speed regulating hole 1173, process hole 1171, through hole 1176, the gap between the hydraulic piston 102 and piston hole 1015, strip hole 106, and connecting hole 110. Since the first speed regulating valve 1177 controls the opening of the first speed regulating hole 1173, that is, when the door closes from 12° to 0°, the first speed regulating valve 1177 adjusts the closing speed. Therefore, this door closer uses hydraulic oil. Compared to the traditional sliding rail snap-lock door stop structure, this door closer has lower positioning noise when stopping the door. Compared to the traditional sliding rail leaf spring door stop structure, this door closer can effectively improve the stability of use and extend the service life.

[0063] It should be noted that, unless otherwise stated, the technical or scientific terms used in this utility model shall have the ordinary meaning as understood by those skilled in the art to which this utility model pertains.

[0064] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A 90° positioning door closer, comprising a body assembly (1), a support arm assembly (2), and a slide rail assembly (3), characterized in that, The body component (1) includes: The main body (101) includes a main housing (1011) and a left end cover (1012) and a right end cover (1013) sealed and connected to the main housing (1011), and a piston hole (1015) is formed inside the main housing (1011). A hydraulic piston (102) is slidably connected in the piston hole (1015), dividing the piston hole (1015) into a piston chamber (103) and a spring chamber (104). The piston chamber (103) is located on the left side of the hydraulic piston (102), and the spring chamber (104) is located on the right side of the hydraulic piston (102). The hydraulic piston (102) is provided with a reduced diameter. The right end of the hydraulic piston (102) is in a sealed sliding fit with the piston hole (1015), and the left end is in a sealed sliding fit with the piston hole (1015) through a seal (105). A strip-shaped hole (106) is provided at the reduced diameter position of the hydraulic piston (102). A pin assembly (107) is rotatably connected to the main housing (1011), and the pin assembly (107) passes through the strip hole (106); A linkage component (108) is disposed on the hydraulic piston (102) and the pin assembly (107), and is used to cause the pin assembly (107) and the hydraulic piston (102) to move in linkage. A return spring (109) is disposed in the spring cavity (104) and is used to push the hydraulic piston (102) to move to the left; A connecting hole (110) is provided at the right end of the hydraulic piston (102) and connects the strip hole (106) and the spring cavity (104); The first oil hole (111) is located at the left end of the hydraulic piston (102) and is connected to the strip hole (106); The first mounting hole (112) is provided at the left end of the hydraulic piston (102) and connects the first oil hole (111) and the piston chamber (103); A first check valve (113) is disposed in the first mounting hole (112) and is used to restrict hydraulic oil to enter the piston chamber (103) only through the strip hole (106); The second mounting hole (115) is located at the left end of the hydraulic piston (102) and connects the piston chamber (103) with the second oil hole (114); The second oil hole (114) is located at the left end of the hydraulic piston (102) and the right side of the seal (105), and connects the second mounting hole (115) and the gap between the hydraulic piston (102) and the piston hole (1015) on the right side of the seal (105). The second check valve (116) is disposed in the second mounting hole (115) and is used to restrict the hydraulic oil in the piston chamber (103) that is below the set oil pressure from entering the second check valve (116) through the piston chamber (103) and then enters the gap, strip hole (106), and spring cavity (104) on the right side of the seal (105) of the left end of the hydraulic piston (102) and the piston hole (1015); When hydraulic oil is filled into the piston chamber (103) and the door is opened to the stop position, the hydraulic oil in the piston chamber (103) cannot open the second check valve (116), thus keeping the door stopped. When a preset external force is applied to the door, the oil pressure of the hydraulic oil in the piston chamber (103) rises to a certain value, causing the second check valve (116) to open under the action of the increased oil pressure hydraulic oil.

2. The door closer according to claim 1, characterized in that, The main body assembly (1) further includes a speed regulating assembly (117) for controlling the closing speed, the speed regulating assembly (117) comprising: A process hole (1171) is provided at the left end of the main housing (1011); A plugging ball (1172) is used to plug the port of the process hole (1171); The first speed regulating hole (1173) is disposed on the main housing (1011) and connects the process hole (1171) and the piston hole (1015); The second speed regulating hole (1174) is disposed on the main housing (1011) and connects the process hole (1171) and the piston hole (1015), and the second speed regulating hole (1174) is located to the right of the first speed regulating hole (1173). A through hole (1176) is provided on the main housing (1011) and connects the process hole (1171) and the piston hole (1015), and the through hole (1176) is located between the first speed regulating hole (1173) and the second speed regulating hole (1174); The first speed control valve (1177) is movably connected to the main housing (1011) and is used to control the opening degree of the first speed control hole (1173); The second speed control valve (1178) is movably connected to the main housing (1011) and is used to control the opening degree of the second speed control hole (1174); When the door is opened to the stop position, the seal (105) closes the second speed regulating hole (1174). When the door is closed to the point where the closing speed controlled by the second speed regulating valve (1178) switches to the point controlled by the first speed regulating valve (1177), the seal (105) closes the through hole (1176).

3. The door closer according to claim 2, characterized in that, The speed regulating component (117) also includes: The third speed regulating hole (1175) is disposed on the main housing (1011) and connects the process hole (1171) and the piston hole (1015), and the third speed regulating hole (1175) is located to the right of the second speed regulating hole (1174). The third speed control valve (1179) is movably connected to the main housing (1011) and is used to control the opening degree of the third speed control hole (1175).

4. The door closer according to claim 3, characterized in that, The speed control component (117) is provided in two sets. The two sets of speed control components (117) are symmetrically arranged along the axis of the main housing (1011). One set of speed control components (117) is used when the door opens and closes to the left, and the other set of speed control components (117) is used when the door opens and closes to the right.

5. The door closer according to claim 2, characterized in that, The sealing element (105) includes a piston ring (1051), a sealing ring groove (1052), a sealing O-ring (1053), and a piston oil seal (1054). The piston ring (1051) is integrally formed and disposed on the left end of the hydraulic piston (102), and the piston ring (1051) slides with clearance with the inner wall of the main housing (1011). The sealing ring groove (1052) is disposed on the piston ring (1051). The sealing O-ring (1053) and the piston oil seal (1054) are respectively embedded in the sealing ring groove (1052), and the piston oil seal (1054) is located outside the sealing O-ring (1053) and is used to close the through hole (1176) or the second speed regulating hole (1174).

6. The door closer according to claim 1, characterized in that, The main body assembly (1) also includes a connecting plate (118), the two ends of which are connected to the main body housing (1011) by locking screws (119), and the two ends of the connecting plate (118) are respectively provided with limiting screws (120) for connecting with the door panel.

7. The door closer according to claim 1, characterized in that, The main housing (1011) has two symmetrically arranged mounting holes (121), and the pin assembly (107) includes: Two shaft caps (1072) are provided, and each is sealed and connected to the corresponding mounting hole (121); Rotate the pin (1071), with the middle part passing through the strip hole (106) and both ends passing through the corresponding shaft caps (1072); The rotating pin (1071) and the two shaft caps (1072) are rotatably connected by bearing assemblies (1073).

8. The door closer according to claim 1, characterized in that, The linkage assembly (108) includes a linkage rack (1081) and a linkage gear (1082). The linkage rack (1081) is disposed on the inner wall of the strip hole (106), and the linkage gear (1082) is disposed on the pin assembly (107), and the linkage gear (1082) meshes with the linkage rack (1081).

9. The door closer according to claim 1, characterized in that, The arm assembly (2) includes a movable arm (21) and a guide block (22). One end of the movable arm (21) is connected to the pin assembly (107), and the other end is rotatably connected to the guide block (22) by a locking screw (24). The guide block (22) is slidably connected to the slide rail assembly (3).

10. The door closer according to claim 9, characterized in that, The slide rail assembly (3) includes a guide slide rail (31), a blocking block (32) and a plurality of connecting screws (33). The blocking block (32) is disposed inside the guide slide rail (31), and when the door is opened to the stop position, the guide block (22) abuts against the blocking block (32). The plurality of connecting screws (33) are respectively disposed on the guide slide rail (31) and are used to connect with the door frame.

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