Orthogonal rack engagement structure

Abstract

The present application relates to a kind of orthogonal rack engagement structure, including axial rack, radial rack, positioning housing;The positioning housing has the positioning hole of mutual perpendicular for axial rack, radial rack insertion;The front end of the radial rack has a flat surface two with tooth bottom flush, the rack root of the most front end of radial rack has a flat surface one with the vertical flat surface two;The front of the most front end tooth of the axial rack has a flat surface three with tooth top flush, and the front of the flat surface three has a positioning step;Axial rack is inserted into corresponding positioning hole first, radial rack is inserted into corresponding positioning hole, and when two racks just engage, the edge of radial rack has a set gap from the positioning step.The present application does not need positioning tool positioning when installing radial rack, and also does not need ruler to measure size positioning;Rack engagement installation is convenient, and error rate is low.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of orthogonal rack engagement structure, belong to mechanical transmission technical field. BACKGROUND

[0002] Axial flow regulating valve is by a pair of orthogonal 45 ° helical rack as transmission mechanism. Actuator drives radial rack up and down movement, drives axial rack left and right movement by 45 ° rack pair, thereby drives the movement of valve core fixed on axial rack, and the throttle hole on cage is shielded by valve core, and downstream pressure, flow is regulated.

[0003] Two racks need to find the position of engagement when assembling, otherwise meshing error can occur during installation, leading to radial rack position is biased up or down. The existing solution is to position the axial rack first by positioning during assembly, and then find the position of engagement by positioning tool or ruler, which is very inconvenient and inefficient. SUMMARY

[0004] The purpose of the present application is to provide a kind of orthogonal rack engagement structure, which does not need positioning tool during installation, does not need to find the size of positioning by ruler, and is reliable and fast in installation.

[0005] The present application adopts the following technical solutions:

[0006] A kind of orthogonal rack engagement structure, including axial rack 2, radial rack 1, positioning housing;The positioning housing has the mutually perpendicular positioning hole that can be inserted into axial rack 2, radial rack 1;The front end of the radial rack 1 has a flat surface two 102 flush with the tooth bottom, and the tooth root of the most front end of the radial rack 1 has a flat surface one 101 perpendicular to the flat surface two 102;The front of the most front end tooth of the axial rack 2 has a flat surface three 201 flush with the tooth top, and the front of the flat surface three 201 has a positioning step 202;Axial rack 2 is inserted into the corresponding positioning hole first, and then radial rack 1 is inserted into the corresponding positioning hole, when the teeth of the two racks just engage, the edge of the radial rack has a set gap from the positioning step 202.

[0007] Preferably, the set gap is 2mm.

[0008] Preferably, the positioning housing is the valve body of the axial flow regulating valve.

[0009] Further, an axial sleeve 3 for limiting the axial rack is also installed in the valve body.

[0010] Further, the valve body is provided with a valve core 4, and the valve core 4 is fixedly connected with the front end of the axial rack 2.

[0011] Further, the valve core 4 and the cage 5 can slide relative to each other, and the valve opening degree is adjusted by shielding the hole of the cage 5 by the valve core 4.

[0012] The installation method of the orthogonal rack meshing structure comprises the following steps: inserting the axial rack 2 into the axial sleeve 3, and inserting the radial rack 1 so that the plane two 102 cooperates with the plane three 201; in this way, the axial rack 2 can only move left and right, and the radial rack 1 can only move up and down, and will not rotate; the axial rack 2 is pulled outwards so that the positioning step 202 contacts the radial rack 1, the radial rack 1 is pressed downwards so that the plane one 101 contacts the axial rack 2, the radial rack 1 is pressed, and the axial rack 2 is slowly pushed inwards; when the axial rack reaches the meshing position, the two racks start to mesh after the teeth of the two racks collide under the action of the force since the radial rack 1 is pressed all the time; the axial rack 2 is continuously pushed inwards, and the radial rack 1 will move downwards, thereby completing effective meshing.

[0013] The axial rack 2 is pulled outwards so that the positioning step 202 contacts the radial rack 1, the radial rack 1 is pressed downwards so that the plane one 101 contacts the axial rack 2, the radial rack 1 is pressed, and the axial rack 2 is slowly pushed inwards; when the axial rack reaches the meshing position, the two racks start to mesh after the teeth of the two racks collide under the action of the force since the radial rack 1 is pressed all the time; the axial rack 2 is continuously pushed inwards, and the radial rack 1 will move downwards, thereby completing effective meshing. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the working principle of the axial flow regulating valve.

[0015] Figure 2 It is a schematic diagram of the radial rack in the application. (a) is the front view of the plane of the helical gear of the radial rack, and (b) is the right view of (a).

[0016] Figure 3 It is a schematic diagram of the axial rack in the application. (a) is the front view of the plane of the helical gear of the axial rack, and (b) is the top view of (a).

[0017] Figure 4 It is a schematic diagram of the installation of the rack in the application. (a) is the main view of the installation, and (b) is the right view of the installation.

[0018] Figure 5 It is a schematic diagram of the two racks just meshing in the application.

[0019] Figure 6 It is a schematic diagram of the orthogonal rack meshing structure of the application.

[0020] In the figure, 1. radial rack, 2. axial rack, 3. axial sleeve, 4. valve core, 5. cage, 101. plane one, 102. plane two, 201. plane three, 202. positioning step. DETAILED DESCRIPTION

[0021] The application will be further described below in connection with the drawings and specific embodiments.

[0022] Figure 1 The working principle of the axial flow regulating valve is shown. The orthogonal rack meshing structure in the embodiment is applied to the axial flow regulating valve,

[0023] Referring to Figure 1 An orthogonal rack meshing structure comprises an axial rack 2, a radial rack 1, and a positioning shell. The positioning shell has mutually perpendicular positioning holes for the axial rack 2 and the radial rack 1 to be inserted into.

[0024] In combination with Figure 2 The front end of the radial rack 1 has a flat surface two 102 flush with the tooth bottom. The tooth root of the front end of the radial rack 1 has a flat surface one 101 perpendicular to the flat surface two 102.

[0025] In combination with Figure 3 The front of the front end tooth of the axial rack 2 has a flat surface three 201 flush with the tooth top. The front part of the flat surface three 201 has a positioning step 202.

[0026] It can be understood that the axial rack 2 is first inserted into the corresponding positioning hole, and then the radial rack 1 is inserted into the corresponding positioning hole. When the teeth of the two racks just mesh, the edge of the radial rack has a set gap from the positioning step 202, as shown in Figure 5 .

[0027] In this embodiment, the set gap is preferably 2 mm.

[0028] In this embodiment, the positioning shell is a valve body of the axial flow regulating valve.

[0029] Referring to Figure 1 An axial sleeve 3 for limiting the axial rack is further installed in the valve body.

[0030] Referring to Figure 1 A valve core 4 is arranged in the valve body. The valve core 4 is fixedly connected to the front end of the axial rack 2.

[0031] Continuing to refer to Figure 1 The valve core 4 can relatively slide with a cage 5. The valve core 4 shields the hole of the cage 5 to adjust the valve opening degree.

[0032] When installing, the axial rack 2 is inserted into the axial sleeve 3, and the radial rack 1 is inserted, so that the plane two 102 cooperates with the plane three 201. In this way, the axial rack 2 only moves left and right, and the radial rack 1 only moves up and down, and does not rotate. The axial rack 2 is pulled outwards, so that the positioning step 202 contacts the radial rack 1, the radial rack 1 is pressed downwards, so that the plane one 101 contacts the axial rack 2, and the radial rack 1 is pressed. Slowly push the axial rack 2 inwards, when the axial rack reaches the meshing position, due to the radial rack 1 being pressed all the time, the two racks will collide under the action of force, a "pop" sound is heard, and the teeth of the two racks begin to mesh. Continue to push the axial rack inwards, the radial rack will follow downwards, thereby completing effective meshing.

[0033] The present application does not need positioning tool positioning when installing the radial rack, and does not need a ruler to measure the size for positioning; the rack is convenient to mesh and install, and the error rate is low.

[0034] The above is the preferred embodiment of the present application, and various transformations and improvements can be made by those skilled in the art on the basis of the present application, and these transformations or improvements are within the scope of the present application without departing from the general concept of the present application.

Claims

1. A mounting method of orthogonal rack meshing structure, characterized in that: the orthogonal rack meshing structure comprises an axial rack (2), a radial rack (1), and a positioning shell; the positioning shell has mutually perpendicular positioning holes for the axial rack (2) and the radial rack (1) to be inserted; the front end of the radial rack (1) has a second plane (102) flush with the tooth bottom, and the most front end of the radial rack (1) has a first plane (101) perpendicular to the second plane (102); the front of the most front end tooth of the axial rack (2) has a third plane (201) flush with the tooth top, and the front of the third plane (201) has a positioning step (202); the axial rack (2) is first inserted into the corresponding positioning hole, the radial rack (1) is inserted into the corresponding positioning hole, and when the two racks are just meshed, the edge of the radial rack has a set gap from the positioning step (202); the positioning shell is a valve body of an axial flow regulating valve; the valve body is provided with a valve core (4), and the valve core (4) is fixedly connected with the front end of the axial rack (2); the valve core (4) and a cage (5) are relatively movable, the valve core (4) shields the hole of the cage (5), and the valve opening degree is adjusted; the mounting method comprises the following steps: the axial rack (2) is inserted into an axial sleeve (3) and the radial rack (1), so that the second plane (102) cooperates with the third plane (201); in this way, the axial rack (2) can only move left and right, the radial rack (1) can only move up and down, and rotation does not occur; the axial rack (2) is pulled outwards, the positioning step (202) is in contact with the radial rack (1), the radial rack (1) is pressed downwards, the first plane (101) is in contact with the axial rack (2), the radial rack (1) is pressed, the axial rack (2) is pushed inwards, when the axial rack reaches the meshing position, due to the continuous pressing of the radial rack (1), the teeth of the two racks are impacted and then start to mesh under the action of force; the axial rack (2) is continuously pushed inwards, the radial rack (1) moves downwards, and effective meshing is completed. The set gap is 2 mm. The valve body is further provided with an axial sleeve (3) for limiting the axial rack. ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The mounting method of the orthogonal rack engagement structure according to claim 1, characterized by: ​ 3. The mounting method of the orthogonal rack engagement structure according to claim 1, characterized by: ​

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