Lower wheel of sliding door

Abstract

The utility model discloses a lower wheel of a sliding door, belongs to the field of sliding hardware fittings of the sliding door, is used for sliding of the bottom of the sliding door, and solves the problems of limiting and fixing of a door body mounting structure. The pulley comprises a shell, a pulley body is arranged in the shell, the pulley body protrudes out of the top of the shell, the bottom of the shell extends out of a buckle piece along the two sides of the shell, and the buckle piece is provided with an upward boss.

Description

Technical Field

[0001] The utility model belongs to the field of sliding hardware fittings for sliding doors, and particularly relates to a lower wheel of a sliding door. Background Art

[0002] Lower pulleys are usually installed at the bottom of sliding doors. The lower pulleys slide along the ground, enabling the door body to be supported by the ground and assisting the sliding of the door body. The lower pulleys need to be installed on door profiles. To overcome the inconveniences brought by the traditional screw installation method, the existing lower pulleys are installed by clamping the rotating pieces with the slot openings of the door profiles. Since there is an installation gap between the rotating pieces and the profile slot openings, during the sliding process of the door body, the vibration of the door body easily causes the rotating pieces to come out of the profile slot openings, resulting in loosening of the lower pulleys and affecting normal use. Content of the Utility Model

[0003] The purpose of the utility model is to provide a clamping installation structure between the lower pulley and the slot of the door profile, and the installation structure is limited to prevent it from coming out of the profile slot.

[0004] A lower wheel of a sliding door includes a housing. A pulley is disposed inside the housing, and the pulley protrudes from the top of the housing. Clamping pieces extend from both sides of the bottom of the housing, and the clamping pieces are provided with upward convex platforms.

[0005] The housing includes an outer housing, a middle housing and an inner housing which are nested in sequence. The pulley is disposed inside the inner housing. Clamping pieces symmetrically extend from both sides of the bottom of the outer housing, and the clamping pieces are symmetrically provided with upward convex platforms along both sides of the outer housing.

[0006] An inclined screw installation hole is formed inward from the bottom end surface of the outer housing.

[0007] An installation hole is formed at the bottom of the outer housing.

[0008] One end surface of the outer housing and one end surface of the middle housing adjacent thereto are threadedly connected by a longitudinal adjusting screw. First obliquely elongated holes are symmetrically formed on the side walls of the middle housing. The middle housing and the inner housing are penetrated by a transverse connecting rod, and the transverse connecting rod passes through the first obliquely elongated holes.

[0009] Vertically elongated holes are symmetrically formed on the side walls of the outer housing, and the transverse connecting rod passes through the vertically elongated holes.

[0010] Second obliquely elongated holes are symmetrically formed on the side walls of the outer housing, and the inclination direction of the second obliquely elongated holes is opposite to that of the first obliquely elongated holes.

[0011] A longitudinal sliding groove is formed on the side wall of the outer housing, and a longitudinal sliding rail is formed on the side wall of the middle housing. The longitudinal sliding rail is slidably installed in the longitudinal sliding groove.

[0012] Advantages of the present utility model: The buckle piece integrally formed with the bottom of the housing is inserted into the notch of the door profile groove, and the boss presses against the notch. Then, screws are obliquely installed through the screw installation holes to fix the housing to the door body. This installation method can not only ensure accurate positioning but also achieve reliable fixation. Description of the Drawings

[0013] Figure 1 FIG. 6 is a perspective view of the first embodiment of the lower pulley of the sliding door of the present utility model;

[0014] Figure 2 is Figure 1 exploded view of;

[0015] Figure 3 FIG. 16 is a perspective view of the second embodiment of the lower pulley of the sliding door of the present utility model;

[0016] Figure 4 FIG. 20 is a perspective view of the third embodiment of the lower pulley of the sliding door of the present utility model;

[0017] Figure 5 FIG. 24 is a perspective view of the fourth embodiment of the lower pulley of the sliding door of the present utility model. Detailed Embodiment

[0018] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] Figure 1 、 2 As shown in FIGS. 35 and 50, the lower pulley of the sliding door includes a housing and a pulley 1. The housing is composed of an outer shell 2, a middle shell 3, and an inner shell 4 nested in sequence. The pulley 1 is placed inside the inner shell 4 and protrudes from the top of the housing. Buckle pieces 5 symmetrically extend from both sides of the bottom of the outer shell 2. The buckle pieces 5 are symmetrically provided with upward bosses 6 on both sides of the outer shell 2. The bottom of the outer shell 2 is provided with inclined screw installation holes 7 inward along its end face, and the bottom of the outer shell 2 is provided with installation holes 8.

[0020] When the lower pulley of the sliding door is installed with the door profile groove, the buckle pieces are inserted into the notch of the door profile groove, and the bosses press against the notch to limit the buckle pieces. At the same time, screws are installed through the screw installation holes to fix the outer shell to the door profile groove, so as to firmly fix the lower pulley of the sliding door to the door body. For more secure fixation, screws can also be installed through the installation holes into the door profile groove for reinforcement. This installation method can not only ensure accurate positioning but also achieve reliable fixation.

[0021] The lower pulley of the push-pull door is also provided with a lifting structure for the pulley. One end face of the outer shell and one end face of the middle shell adjacent thereto are threadedly connected through a longitudinal adjusting screw 9. The side walls of the middle shell are symmetrically provided with first obliquely elongated holes 10. The middle shell and the inner shell are penetrated by a transverse connecting rod 11, and the transverse connecting rod passes through the first obliquely elongated holes. By turning the adjusting screw, a screw drive is formed between the adjusting screw and the middle shell, so that the middle shell moves longitudinally relative to the outer shell, thereby driving the transverse connecting rod to move along the first obliquely elongated holes. Further, the transverse connecting rod drives the inner shell and the pulley to achieve a lifting motion, so as to adjust the height of the pulley from the ground.

[0022] In order to enable the inner shell and the pulley to vertically lift, the side walls of the outer shell are symmetrically provided with vertically elongated holes 12, and the transverse connecting rod 11 passes through the vertically elongated holes 12. In order to guide the movement of the middle shell, the side walls of the outer shell are symmetrically provided with longitudinal chutes 13, and the side walls of the middle shell are symmetrically provided with longitudinal sliding rails 14. The longitudinal sliding rails are correspondingly slidably installed in the longitudinal chutes, which is Embodiment 1 (as Figure 1 、 2 shown); Further, in order to enable the shell and the pulley to obliquely lift, the side walls of the outer shell are symmetrically provided with second obliquely elongated holes 15, and the inclination direction of the second obliquely elongated holes is opposite to that of the first obliquely elongated holes, and the transverse connecting rod passes through the second obliquely elongated holes, which is Embodiment 2 (as Figure 3 shown);

[0023] The outer shell has no longitudinal chute, and the middle shell has no longitudinal sliding rail. The side walls of the outer shell are symmetrically provided with second obliquely elongated holes 15, and the inclination direction of the second obliquely elongated holes is opposite to that of the first obliquely elongated holes, and the transverse connecting rod passes through the second obliquely elongated holes, which is Embodiment 3 (as Figure 4 shown); Further, the side walls of the outer shell are symmetrically provided with vertically elongated holes 12, and the transverse connecting rod passes through the vertically elongated holes 12, which is Embodiment 4 (as Figure 5 shown).

Claims

1. A lower pulley for a sliding door, characterized in that, It includes a housing, with a pulley (1) built inside the housing. The pulley (1) protrudes from the top of the housing. The bottom of the housing extends out buckle pieces (5) along both sides of the housing, and the buckle pieces (5) are provided with upward convex platforms (6).

2. The lower pulley of the sliding door according to claim 1, characterized in that The housing includes an outer shell (2), a middle shell (3) and an inner shell (4) nested in sequence. The pulley (1) is built inside the inner shell (4). The bottom of the outer shell (2) symmetrically extends out buckle pieces (5) along both sides of the outer shell (2), and the buckle pieces (5) are symmetrically provided with upward convex platforms (6) along both sides of the outer shell (2).

3. The lower pulley of the sliding door according to claim 2, characterized in that The bottom of the outer shell (2) is provided with inclined screw mounting holes (7) inward along its end face.

4. The lower pulley of the sliding door according to claim 2, characterized in that, The bottom of the outer shell (2) is provided with mounting holes (8).

5. The lower pulley of the sliding door according to claim 2, wherein One end face of the outer shell (2) and one end face of the middle shell (3) adjacent to it are threadedly connected by a longitudinal adjusting screw (9). The side wall of the middle shell (3) is symmetrically provided with first obliquely elongated holes (10). The middle shell (3) and the inner shell (4) are penetrated by a transverse connecting rod (11), and the transverse connecting rod (11) passes through the first obliquely elongated holes (10).

6. The lower pulley of the sliding door according to claim 5, wherein The side wall of the outer shell (2) is symmetrically provided with vertically elongated holes (12), and the transverse connecting rod (11) passes through the vertically elongated holes (12).

7. The lower pulley of the sliding door according to claim 5, characterized in that, The side wall of the outer shell (2) is symmetrically provided with second obliquely elongated holes (15), and the inclination direction of the second obliquely elongated holes (15) is opposite to that of the first obliquely elongated holes (10).

8. The lower pulley of the push-pull door according to claim 6 or 7, characterized in that The side wall of the outer shell (2) is provided with a longitudinal sliding groove (13), and the side wall of the middle shell (3) is provided with a longitudinal sliding rail (14). The longitudinal sliding rail (14) is slidably mounted in the longitudinal sliding groove (13).

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