Limiting device for side door of excavator

Abstract

The utility model relates to the technical field of excavator parts, in particular to an excavator side door limiting device which comprises a fixed mounting plate, a limiting rod and a side door sliding groove. The limiting device is mounted in the middle of the side door; the limiting rods are four telescopic rod pieces which are connected with one another in a sleeving manner; the first rod section of the limiting rod is connected with the door side sliding groove. The right side of the first rod section of the limiting rod is bent towards the interior of the door side sliding groove and extends into the sliding block. A hollow lubricating cylinder is arranged at the right bent part of the first rod section of the limiting rod; a movable shaft I is arranged at the tail part of the lubricating cylinder; the first rod section of the limiting rod is rotationally connected with the sliding block through a movable shaft I; a pressing assembly is arranged in the lubricating cylinder; a circular hole is formed in the cylinder wall at the contact part of the tail part of the lubricating cylinder and the sliding block; lubricating oil can be placed in the lubricating cylinder, the lubricating oil flows to the sliding block through the circular hole by pressing the assembly, and the lubricating effect is achieved. After the side door is opened, the limiting rod slides in the sliding groove to control the opening angle of the side door.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator parts, in particular to a side door limiting device for an excavator. Background Art

[0002] An excavator, also known as a backhoe, is a heavy-duty engineering machinery, and the side door is one of the side doors of the cab component of the excavator; the door panel at the traditional excavator side door body lacks a limit device, which causes the door panel to move automatically when blown by the wind after it is opened, and collides with the excavator body, which can easily cause damage to the door panel and reduce its service life; because the environment in which the excavator is located generally contains more dust-like substances, coupled with the frequent opening and closing of the door, the limit device is easily worn or there is an abnormal sound when the door is opened, and it is necessary to regularly apply lubricating oil to reduce friction. Utility Model Content

[0003] The purpose of the present application is to provide a side door limiting device for an excavator, aiming to solve the problems in the prior art.

[0004] The embodiment of the present application provides a side door limit device of an excavator, wherein the limit device comprises a fixed mounting plate, a limit rod and a door side slide groove; the limit device is installed in the middle position of the side door; the limit rod is a retractable rod member with four sections that are mutually sleeved; the first rod section of the limit rod is connected to the door side slide groove; the right side of the first rod section of the limit rod is bent into the door side slide groove and extends into the interior of the sliding block; the right side bending part of the first rod section of the limit rod is an internal hollow lubrication cylinder, and a movable shaft 1 is provided at the tail end of the lubrication cylinder; the first rod section of the limit rod is rotatably connected to the sliding block through the movable shaft 1; a pressing assembly is provided inside the lubrication cylinder, and the pressing assembly comprises a pressing rod, a rubber sealing plug and a return spring; a circular hole is provided on the cylinder wall where the tail end of the lubrication cylinder contacts the sliding block; a return spring is provided in front of the movable shaft 1, and a first rubber sealing plug is provided at the front end of the return spring; a second rubber sealing plug is provided at the front end of the lubrication cylinder; the pressing rod connects the two rubber sealing plugs and extends out of the lubrication cylinder.

[0005] Furthermore, the sliding block is located in the door side sliding groove and is spherical in shape.

[0006] Furthermore, the left ends of the second rod section and the third rod section of the limiting rod are provided with spring buckles, and the right ends of the third rod section and the fourth rod section are provided with slots.

[0007] Furthermore, a second movable shaft is provided at the left end of the fourth rod section of the limiting rod; the limiting rod is connected to the fixed mounting plate via the second movable shaft.

[0008] Furthermore, an opening is provided on the top of the lubrication cylinder.

[0009] Furthermore, the cross-section of the fixed mounting plate is L-shaped, and there are two of them, which are fixed to the inner wall of the cab by screws.

[0010] The beneficial effects of the utility model are as follows: lubricating oil can be put into the lubrication cylinder, and by pressing, the lubricating oil flows to the sliding block to achieve lubrication, and the sliding block and the sliding groove can be lubricated at any time, which is convenient for operation and keeps the entire limiting device in a good sliding state; after the side door is opened, the limiting rod slides in the sliding groove to control the opening angle of the side door; the position between the slot and the buckle is adjusted by rotating the limiting rod section, and the length of the fixing limiting rod is achieved to limit the position of the side door. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the overall structure diagram of the utility model.

[0012] Figure 2 This is a cross-sectional view of the interior of the lubrication cylinder.

[0013] Figure 3 This is a cross-sectional view of the limit rod.

[0014] In the figure:

[0015] 1. Fixed mounting plate; 21. Active axis 1; 2. Active axis 2; 3. Limit rod; 4. Lubricating cylinder; 5. Door side slide groove; 6. Sliding block; 40. Opening; 41. Pressing rod; 42. First rubber sealing plug; 43. Second rubber sealing plug; 44. Reset spring; 45. Round hole; 31. First rod section; 32. Second rod section; 33. Third rod section; 34. Fourth rod section; 35. Slot; 36. Spring buckle. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figures 1 to 3The illustrated embodiment shows a side door limit device for an excavator, the limit device comprising a fixed mounting plate 1, a limit rod 3 and a door side slide groove 5; the limit device is installed in the middle position of the side door; the limit rod 3 is a retractable rod member with four sections which are mutually sleeved; the first rod section 31 of the limit rod is connected to the door side slide groove 5; the right side of the first rod section 31 of the limit rod is bent into the door side slide groove 5 and extends into the sliding block 6; the right side bending part of the first rod section 31 of the limit rod is an internal hollow lubrication cylinder 4, and a movable shaft 21 is provided at the tail end of the lubrication cylinder 4; the first rod section 31 of the limit rod is rotatably connected to the sliding block 6 through the movable shaft 21; the limit rod 3 and the sliding block 6 can be rotated at any angle; the lubrication cylinder 4 is provided with a press A pressing assembly comprises a pressing rod 41, a rubber sealing plug and a return spring 44; a circular hole 45 is provided on the wall of the lubricating cylinder 4 where the tail of the lubricating cylinder 4 contacts the sliding block 6; a return spring 44 is provided in front of the movable shaft 21, and a first rubber sealing plug 42 is provided at the front end of the return spring 44; a second rubber sealing plug 43 is provided at the front end of the lubricating cylinder 4; the pressing rod 41 connects the two rubber sealing plugs and extends out of the lubricating cylinder 4; the lubricating oil is poured into the lubricating cylinder 4, which is located in the closed space between the two rubber sealing plugs, and the pressing rod 41 is pressed from the outside to make the lubricating oil move toward the sliding block under the drive of the two rubber sealing plugs until it reaches the circular hole 45 and flows out of the hole to achieve the lubrication effect.

[0018] The sliding block 6 is located in the door side sliding groove 5 and is spherical in shape.

[0019] The left ends of the second rod section 32 and the third rod section 33 of the limiting rod 3 are provided with spring buckles 36, and the right ends of the third rod section 33 and the fourth rod section 34 are provided with slots 35; the second and third rod sections can rotate. If it is necessary to fix the door opening angle, the spring buckle 36 and the slot 35 can be engaged with each other by rotating the second and third rod sections, and the length of the telescopic rod can be adjusted and fixed to control the opening angle of the side door.

[0020] A movable shaft 2 is disposed at the left end of the fourth rod section 34 of the limiting rod 3 ; the limiting rod 3 is connected to the fixed mounting plate 1 via the movable shaft 2 .

[0021] The top of the lubricating cylinder 4 is provided with an opening 40; lubricating oil can be added from this opening.

[0022] There are two fixed installation plates 1, each of which has an L-shaped cross section and is fixed to the inner wall of the cab by screws.

[0023] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A side door limiting device for an excavator, characterized in that: The limit device includes a fixed mounting plate, a limit rod and a door side slide groove; the limit device is installed in the middle position of the side door; the limit rod is a retractable rod with four sections that are mutually sleeved; the first rod section of the limit rod is connected to the door side slide groove; the right side of the first rod section of the limit rod is bent into the door side slide groove and extends into the sliding block; the right side bending part of the first rod section of the limit rod is an internal hollow lubrication cylinder, and a movable shaft 1 is provided at the tail end of the lubrication cylinder; the first rod section of the limit rod is rotatably connected to the sliding block through the movable shaft; a pressing assembly is provided inside the lubrication cylinder, and the pressing assembly includes a pressing rod, a rubber sealing plug and a return spring; a circular hole is provided on the cylinder wall where the tail end of the lubrication cylinder contacts the sliding block; a return spring is provided in front of the movable shaft, and a first rubber sealing plug is provided at the front end of the return spring; a second rubber sealing plug is provided at the front end of the lubrication cylinder; the pressing rod connects the two rubber sealing plugs and extends out of the lubrication cylinder.

2. The excavator side door limiting device according to claim 1, characterized in that: The sliding block is located in the door side sliding groove and is spherical in shape.

3. The excavator side door limiting device according to claim 1, characterized in that: The left ends of the second rod section and the third rod section of the limiting rod are provided with spring buckles, and the right ends of the third rod section and the fourth rod section are provided with clamping grooves.

4. The excavator side door limiting device according to claim 1, characterized in that: A second movable shaft is arranged at the left end of the fourth rod section of the limiting rod; the limiting rod is connected to the fixed mounting plate via the movable shaft.

5. The excavator side door limiting device according to claim 1, characterized in that: The top of the lubricating cylinder is provided with an opening.

6. The excavator side door limiting device according to claim 1, characterized in that: There are two fixed mounting plates in total, each of which has an L-shaped cross section and is fixed to the inner wall of the cab by screws.

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